sftpgo/internal/common/eventmanager.go

// Copyright (C) 2019-2023 Nicola Murino
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, version 3.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

package common

import (
	"bytes"
	"context"
	"encoding/csv"
	"encoding/json"
	"errors"
	"fmt"
	"io"
	"mime"
	"mime/multipart"
	"net/http"
	"net/textproto"
	"net/url"
	"os"
	"os/exec"
	"path"
	"path/filepath"
	"strconv"
	"strings"
	"sync"
	"sync/atomic"
	"time"

	"github.com/bmatcuk/doublestar/v4"
	"github.com/klauspost/compress/zip"
	"github.com/robfig/cron/v3"
	"github.com/rs/xid"
	"github.com/sftpgo/sdk"
	"github.com/wneessen/go-mail"

	"github.com/drakkan/sftpgo/v2/internal/dataprovider"
	"github.com/drakkan/sftpgo/v2/internal/logger"
	"github.com/drakkan/sftpgo/v2/internal/plugin"
	"github.com/drakkan/sftpgo/v2/internal/smtp"
	"github.com/drakkan/sftpgo/v2/internal/util"
	"github.com/drakkan/sftpgo/v2/internal/vfs"
)

const (
	ipBlockedEventName = "IP Blocked"
	maxAttachmentsSize = int64(10 * 1024 * 1024)
)

// Supported IDP login events
const (
	IDPLoginUser  = "IDP login user"
	IDPLoginAdmin = "IDP login admin"
)

var (
	// eventManager handle the supported event rules actions
	eventManager          eventRulesContainer
	multipartQuoteEscaper = strings.NewReplacer("\\", "\\\\", `"`, "\\\"")
)

func init() {
	eventManager = eventRulesContainer{
		schedulesMapping: make(map[string][]cron.EntryID),
		// arbitrary maximum number of concurrent asynchronous tasks,
		// each task could execute multiple actions
		concurrencyGuard: make(chan struct{}, 200),
	}
	dataprovider.SetEventRulesCallbacks(eventManager.loadRules, eventManager.RemoveRule,
		func(operation, executor, ip, objectType, objectName, role string, object plugin.Renderer) {
			eventManager.handleProviderEvent(EventParams{
				Name:       executor,
				ObjectName: objectName,
				Event:      operation,
				Status:     1,
				ObjectType: objectType,
				IP:         ip,
				Role:       role,
				Timestamp:  time.Now().UnixNano(),
				Object:     object,
			})
		})
}

// HandleCertificateEvent checks and executes action rules for certificate events
func HandleCertificateEvent(params EventParams) {
	eventManager.handleCertificateEvent(params)
}

// HandleIDPLoginEvent executes actions defined for a successful login from an Identity Provider
func HandleIDPLoginEvent(params EventParams, customFields *map[string]any) (*dataprovider.User, *dataprovider.Admin, error) {
	return eventManager.handleIDPLoginEvent(params, customFields)
}

// eventRulesContainer stores event rules by trigger
type eventRulesContainer struct {
	sync.RWMutex
	lastLoad          atomic.Int64
	FsEvents          []dataprovider.EventRule
	ProviderEvents    []dataprovider.EventRule
	Schedules         []dataprovider.EventRule
	IPBlockedEvents   []dataprovider.EventRule
	CertificateEvents []dataprovider.EventRule
	IPDLoginEvents    []dataprovider.EventRule
	schedulesMapping  map[string][]cron.EntryID
	concurrencyGuard  chan struct{}
}

func (r *eventRulesContainer) addAsyncTask() {
	activeHooks.Add(1)
	r.concurrencyGuard <- struct{}{}
}

func (r *eventRulesContainer) removeAsyncTask() {
	activeHooks.Add(-1)
	<-r.concurrencyGuard
}

func (r *eventRulesContainer) getLastLoadTime() int64 {
	return r.lastLoad.Load()
}

func (r *eventRulesContainer) setLastLoadTime(modTime int64) {
	r.lastLoad.Store(modTime)
}

// RemoveRule deletes the rule with the specified name
func (r *eventRulesContainer) RemoveRule(name string) {
	r.Lock()
	defer r.Unlock()

	r.removeRuleInternal(name)
	eventManagerLog(logger.LevelDebug, "event rules updated after delete, fs events: %d, provider events: %d, schedules: %d",
		len(r.FsEvents), len(r.ProviderEvents), len(r.Schedules))
}

func (r *eventRulesContainer) removeRuleInternal(name string) {
	for idx := range r.FsEvents {
		if r.FsEvents[idx].Name == name {
			lastIdx := len(r.FsEvents) - 1
			r.FsEvents[idx] = r.FsEvents[lastIdx]
			r.FsEvents = r.FsEvents[:lastIdx]
			eventManagerLog(logger.LevelDebug, "removed rule %q from fs events", name)
			return
		}
	}
	for idx := range r.ProviderEvents {
		if r.ProviderEvents[idx].Name == name {
			lastIdx := len(r.ProviderEvents) - 1
			r.ProviderEvents[idx] = r.ProviderEvents[lastIdx]
			r.ProviderEvents = r.ProviderEvents[:lastIdx]
			eventManagerLog(logger.LevelDebug, "removed rule %q from provider events", name)
			return
		}
	}
	for idx := range r.IPBlockedEvents {
		if r.IPBlockedEvents[idx].Name == name {
			lastIdx := len(r.IPBlockedEvents) - 1
			r.IPBlockedEvents[idx] = r.IPBlockedEvents[lastIdx]
			r.IPBlockedEvents = r.IPBlockedEvents[:lastIdx]
			eventManagerLog(logger.LevelDebug, "removed rule %q from IP blocked events", name)
			return
		}
	}
	for idx := range r.CertificateEvents {
		if r.CertificateEvents[idx].Name == name {
			lastIdx := len(r.CertificateEvents) - 1
			r.CertificateEvents[idx] = r.CertificateEvents[lastIdx]
			r.CertificateEvents = r.CertificateEvents[:lastIdx]
			eventManagerLog(logger.LevelDebug, "removed rule %q from certificate events", name)
			return
		}
	}
	for idx := range r.IPDLoginEvents {
		if r.IPDLoginEvents[idx].Name == name {
			lastIdx := len(r.IPDLoginEvents) - 1
			r.IPDLoginEvents[idx] = r.IPDLoginEvents[lastIdx]
			r.IPDLoginEvents = r.IPDLoginEvents[:lastIdx]
			eventManagerLog(logger.LevelDebug, "removed rule %q from IDP login events", name)
			return
		}
	}
	for idx := range r.Schedules {
		if r.Schedules[idx].Name == name {
			if schedules, ok := r.schedulesMapping[name]; ok {
				for _, entryID := range schedules {
					eventManagerLog(logger.LevelDebug, "removing scheduled entry id %d for rule %q", entryID, name)
					eventScheduler.Remove(entryID)
				}
				delete(r.schedulesMapping, name)
			}

			lastIdx := len(r.Schedules) - 1
			r.Schedules[idx] = r.Schedules[lastIdx]
			r.Schedules = r.Schedules[:lastIdx]
			eventManagerLog(logger.LevelDebug, "removed rule %q from scheduled events", name)
			return
		}
	}
}

func (r *eventRulesContainer) addUpdateRuleInternal(rule dataprovider.EventRule) {
	r.removeRuleInternal(rule.Name)
	if rule.DeletedAt > 0 {
		deletedAt := util.GetTimeFromMsecSinceEpoch(rule.DeletedAt)
		if deletedAt.Add(30 * time.Minute).Before(time.Now()) {
			eventManagerLog(logger.LevelDebug, "removing rule %q deleted at %s", rule.Name, deletedAt)
			go dataprovider.RemoveEventRule(rule) //nolint:errcheck
		}
		return
	}
	if rule.Status != 1 || rule.Trigger == dataprovider.EventTriggerOnDemand {
		return
	}
	switch rule.Trigger {
	case dataprovider.EventTriggerFsEvent:
		r.FsEvents = append(r.FsEvents, rule)
		eventManagerLog(logger.LevelDebug, "added rule %q to fs events", rule.Name)
	case dataprovider.EventTriggerProviderEvent:
		r.ProviderEvents = append(r.ProviderEvents, rule)
		eventManagerLog(logger.LevelDebug, "added rule %q to provider events", rule.Name)
	case dataprovider.EventTriggerIPBlocked:
		r.IPBlockedEvents = append(r.IPBlockedEvents, rule)
		eventManagerLog(logger.LevelDebug, "added rule %q to IP blocked events", rule.Name)
	case dataprovider.EventTriggerCertificate:
		r.CertificateEvents = append(r.CertificateEvents, rule)
		eventManagerLog(logger.LevelDebug, "added rule %q to certificate events", rule.Name)
	case dataprovider.EventTriggerIDPLogin:
		r.IPDLoginEvents = append(r.IPDLoginEvents, rule)
		eventManagerLog(logger.LevelDebug, "added rule %q to IDP login events", rule.Name)
	case dataprovider.EventTriggerSchedule:
		for _, schedule := range rule.Conditions.Schedules {
			cronSpec := schedule.GetCronSpec()
			job := &eventCronJob{
				ruleName: dataprovider.ConvertName(rule.Name),
			}
			entryID, err := eventScheduler.AddJob(cronSpec, job)
			if err != nil {
				eventManagerLog(logger.LevelError, "unable to add scheduled rule %q, cron string %q: %v", rule.Name, cronSpec, err)
				return
			}
			r.schedulesMapping[rule.Name] = append(r.schedulesMapping[rule.Name], entryID)
			eventManagerLog(logger.LevelDebug, "schedule for rule %q added, id: %d, cron string %q, active scheduling rules: %d",
				rule.Name, entryID, cronSpec, len(r.schedulesMapping))
		}
		r.Schedules = append(r.Schedules, rule)
		eventManagerLog(logger.LevelDebug, "added rule %q to scheduled events", rule.Name)
	default:
		eventManagerLog(logger.LevelError, "unsupported trigger: %d", rule.Trigger)
	}
}

func (r *eventRulesContainer) loadRules() {
	eventManagerLog(logger.LevelDebug, "loading updated rules")
	modTime := util.GetTimeAsMsSinceEpoch(time.Now())
	rules, err := dataprovider.GetRecentlyUpdatedRules(r.getLastLoadTime())
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to load event rules: %v", err)
		return
	}
	eventManagerLog(logger.LevelDebug, "recently updated event rules loaded: %d", len(rules))

	if len(rules) > 0 {
		r.Lock()
		defer r.Unlock()

		for _, rule := range rules {
			r.addUpdateRuleInternal(rule)
		}
	}
	eventManagerLog(logger.LevelDebug, "event rules updated, fs events: %d, provider events: %d, schedules: %d, ip blocked events: %d, certificate events: %d, IDP login events: %d",
		len(r.FsEvents), len(r.ProviderEvents), len(r.Schedules), len(r.IPBlockedEvents), len(r.CertificateEvents), len(r.IPDLoginEvents))

	r.setLastLoadTime(modTime)
}

func (*eventRulesContainer) checkIPDLoginEventMatch(conditions *dataprovider.EventConditions, params *EventParams) bool {
	switch conditions.IDPLoginEvent {
	case dataprovider.IDPLoginUser:
		if params.Event != IDPLoginUser {
			return false
		}
	case dataprovider.IDPLoginAdmin:
		if params.Event != IDPLoginAdmin {
			return false
		}
	}
	return checkEventConditionPatterns(params.Name, conditions.Options.Names)
}

func (*eventRulesContainer) checkProviderEventMatch(conditions *dataprovider.EventConditions, params *EventParams) bool {
	if !util.Contains(conditions.ProviderEvents, params.Event) {
		return false
	}
	if !checkEventConditionPatterns(params.Name, conditions.Options.Names) {
		return false
	}
	if !checkEventConditionPatterns(params.Role, conditions.Options.RoleNames) {
		return false
	}
	if len(conditions.Options.ProviderObjects) > 0 && !util.Contains(conditions.Options.ProviderObjects, params.ObjectType) {
		return false
	}
	return true
}

func (*eventRulesContainer) checkFsEventMatch(conditions *dataprovider.EventConditions, params *EventParams) bool {
	if !util.Contains(conditions.FsEvents, params.Event) {
		return false
	}
	if !checkEventConditionPatterns(params.Name, conditions.Options.Names) {
		return false
	}
	if !checkEventConditionPatterns(params.Role, conditions.Options.RoleNames) {
		return false
	}
	if !checkEventGroupConditionPatters(params.Groups, conditions.Options.GroupNames) {
		return false
	}
	if !checkEventConditionPatterns(params.VirtualPath, conditions.Options.FsPaths) {
		return false
	}
	if len(conditions.Options.Protocols) > 0 && !util.Contains(conditions.Options.Protocols, params.Protocol) {
		return false
	}
	if params.Event == operationUpload || params.Event == operationDownload {
		if conditions.Options.MinFileSize > 0 {
			if params.FileSize < conditions.Options.MinFileSize {
				return false
			}
		}
		if conditions.Options.MaxFileSize > 0 {
			if params.FileSize > conditions.Options.MaxFileSize {
				return false
			}
		}
	}
	return true
}

// hasFsRules returns true if there are any rules for filesystem event triggers
func (r *eventRulesContainer) hasFsRules() bool {
	r.RLock()
	defer r.RUnlock()

	return len(r.FsEvents) > 0
}

// handleFsEvent executes the rules actions defined for the specified event.
// The boolean parameter indicates whether a sync action was executed
func (r *eventRulesContainer) handleFsEvent(params EventParams) (bool, error) {
	if params.Protocol == protocolEventAction {
		return false, nil
	}
	r.RLock()

	var rulesWithSyncActions, rulesAsync []dataprovider.EventRule
	for _, rule := range r.FsEvents {
		if r.checkFsEventMatch(&rule.Conditions, &params) {
			if err := rule.CheckActionsConsistency(""); err != nil {
				eventManagerLog(logger.LevelWarn, "rule %q skipped: %v, event %q",
					rule.Name, err, params.Event)
				continue
			}
			hasSyncActions := false
			for _, action := range rule.Actions {
				if action.Options.ExecuteSync {
					hasSyncActions = true
					break
				}
			}
			if hasSyncActions {
				rulesWithSyncActions = append(rulesWithSyncActions, rule)
			} else {
				rulesAsync = append(rulesAsync, rule)
			}
		}
	}

	r.RUnlock()

	params.sender = params.Name
	if len(rulesAsync) > 0 {
		go executeAsyncRulesActions(rulesAsync, params)
	}

	if len(rulesWithSyncActions) > 0 {
		return true, executeSyncRulesActions(rulesWithSyncActions, params)
	}
	return false, nil
}

func (r *eventRulesContainer) handleIDPLoginEvent(params EventParams, customFields *map[string]any) (*dataprovider.User,
	*dataprovider.Admin, error,
) {
	r.RLock()

	var rulesWithSyncActions, rulesAsync []dataprovider.EventRule
	for _, rule := range r.IPDLoginEvents {
		if r.checkIPDLoginEventMatch(&rule.Conditions, &params) {
			if err := rule.CheckActionsConsistency(""); err != nil {
				eventManagerLog(logger.LevelWarn, "rule %q skipped: %v, event %q",
					rule.Name, err, params.Event)
				continue
			}
			hasSyncActions := false
			for _, action := range rule.Actions {
				if action.Options.ExecuteSync {
					hasSyncActions = true
					break
				}
			}
			if hasSyncActions {
				rulesWithSyncActions = append(rulesWithSyncActions, rule)
			} else {
				rulesAsync = append(rulesAsync, rule)
			}
		}
	}

	r.RUnlock()

	if len(rulesAsync) == 0 && len(rulesWithSyncActions) == 0 {
		return nil, nil, nil
	}

	params.addIDPCustomFields(customFields)
	if len(rulesWithSyncActions) > 1 {
		var ruleNames []string
		for _, r := range rulesWithSyncActions {
			ruleNames = append(ruleNames, r.Name)
		}
		return nil, nil, fmt.Errorf("more than one account check action rules matches: %q", strings.Join(ruleNames, ","))
	}

	if len(rulesAsync) > 0 {
		go executeAsyncRulesActions(rulesAsync, params)
	}

	if len(rulesWithSyncActions) > 0 {
		return executeIDPAccountCheckRule(rulesWithSyncActions[0], params)
	}
	return nil, nil, nil
}

// username is populated for user objects
func (r *eventRulesContainer) handleProviderEvent(params EventParams) {
	r.RLock()
	defer r.RUnlock()

	var rules []dataprovider.EventRule
	for _, rule := range r.ProviderEvents {
		if r.checkProviderEventMatch(&rule.Conditions, &params) {
			if err := rule.CheckActionsConsistency(params.ObjectType); err == nil {
				rules = append(rules, rule)
			} else {
				eventManagerLog(logger.LevelWarn, "rule %q skipped: %v, event %q object type %q",
					rule.Name, err, params.Event, params.ObjectType)
			}
		}
	}

	if len(rules) > 0 {
		params.sender = params.ObjectName
		go executeAsyncRulesActions(rules, params)
	}
}

func (r *eventRulesContainer) handleIPBlockedEvent(params EventParams) {
	r.RLock()
	defer r.RUnlock()

	if len(r.IPBlockedEvents) == 0 {
		return
	}
	var rules []dataprovider.EventRule
	for _, rule := range r.IPBlockedEvents {
		if err := rule.CheckActionsConsistency(""); err == nil {
			rules = append(rules, rule)
		} else {
			eventManagerLog(logger.LevelWarn, "rule %q skipped: %v, event %q",
				rule.Name, err, params.Event)
		}
	}

	if len(rules) > 0 {
		go executeAsyncRulesActions(rules, params)
	}
}

func (r *eventRulesContainer) handleCertificateEvent(params EventParams) {
	r.RLock()
	defer r.RUnlock()

	if len(r.CertificateEvents) == 0 {
		return
	}
	var rules []dataprovider.EventRule
	for _, rule := range r.CertificateEvents {
		if err := rule.CheckActionsConsistency(""); err == nil {
			rules = append(rules, rule)
		} else {
			eventManagerLog(logger.LevelWarn, "rule %q skipped: %v, event %q",
				rule.Name, err, params.Event)
		}
	}

	if len(rules) > 0 {
		go executeAsyncRulesActions(rules, params)
	}
}

type executedRetentionCheck struct {
	Username   string
	ActionName string
	Results    []folderRetentionCheckResult
}

// EventParams defines the supported event parameters
type EventParams struct {
	Name                  string
	Groups                []sdk.GroupMapping
	Event                 string
	Status                int
	VirtualPath           string
	FsPath                string
	VirtualTargetPath     string
	FsTargetPath          string
	ObjectName            string
	ObjectType            string
	FileSize              int64
	Elapsed               int64
	Protocol              string
	IP                    string
	Role                  string
	Timestamp             int64
	IDPCustomFields       *map[string]string
	Object                plugin.Renderer
	sender                string
	updateStatusFromError bool
	errors                []string
	retentionChecks       []executedRetentionCheck
}

func (p *EventParams) getACopy() *EventParams {
	params := *p
	params.errors = make([]string, len(p.errors))
	copy(params.errors, p.errors)
	retentionChecks := make([]executedRetentionCheck, 0, len(p.retentionChecks))
	for _, c := range p.retentionChecks {
		executedCheck := executedRetentionCheck{
			Username:   c.Username,
			ActionName: c.ActionName,
		}
		executedCheck.Results = make([]folderRetentionCheckResult, len(c.Results))
		copy(executedCheck.Results, c.Results)
		retentionChecks = append(retentionChecks, executedCheck)
	}
	params.retentionChecks = retentionChecks
	if p.IDPCustomFields != nil {
		fields := make(map[string]string)
		for k, v := range *p.IDPCustomFields {
			fields[k] = v
		}
		params.IDPCustomFields = &fields
	}

	return &params
}

func (p *EventParams) addIDPCustomFields(customFields *map[string]any) {
	if customFields == nil {
		return
	}

	fields := make(map[string]string)
	for k, v := range *customFields {
		switch val := v.(type) {
		case string:
			fields[k] = val
		}
	}
	p.IDPCustomFields = &fields
}

// AddError adds a new error to the event params and update the status if needed
func (p *EventParams) AddError(err error) {
	if err == nil {
		return
	}
	if p.updateStatusFromError && p.Status == 1 {
		p.Status = 2
	}
	p.errors = append(p.errors, err.Error())
}

func (p *EventParams) setBackupParams(backupPath string) {
	if p.sender != "" {
		return
	}
	p.sender = dataprovider.ActionExecutorSystem
	p.FsPath = backupPath
	p.ObjectName = filepath.Base(backupPath)
	p.VirtualPath = "/" + p.ObjectName
	p.Timestamp = time.Now().UnixNano()
	info, err := os.Stat(backupPath)
	if err == nil {
		p.FileSize = info.Size()
	}
}

func (p *EventParams) getStatusString() string {
	switch p.Status {
	case 1:
		return "OK"
	default:
		return "KO"
	}
}

// getUsers returns users with group settings not applied
func (p *EventParams) getUsers() ([]dataprovider.User, error) {
	if p.sender == "" {
		dump, err := dataprovider.DumpData([]string{dataprovider.DumpScopeUsers})
		if err != nil {
			eventManagerLog(logger.LevelError, "unable to get users: %+v", err)
			return nil, errors.New("unable to get users")
		}
		return dump.Users, nil
	}
	user, err := p.getUserFromSender()
	if err != nil {
		return nil, err
	}
	return []dataprovider.User{user}, nil
}

func (p *EventParams) getUserFromSender() (dataprovider.User, error) {
	if p.sender == dataprovider.ActionExecutorSystem {
		return dataprovider.User{
			BaseUser: sdk.BaseUser{
				Status:   1,
				Username: p.sender,
				HomeDir:  dataprovider.GetBackupsPath(),
				Permissions: map[string][]string{
					"/": {dataprovider.PermAny},
				},
			},
		}, nil
	}
	user, err := dataprovider.UserExists(p.sender, "")
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to get user %q: %+v", p.sender, err)
		return user, fmt.Errorf("error getting user %q", p.sender)
	}
	return user, nil
}

func (p *EventParams) getFolders() ([]vfs.BaseVirtualFolder, error) {
	if p.sender == "" {
		dump, err := dataprovider.DumpData([]string{dataprovider.DumpScopeFolders})
		return dump.Folders, err
	}
	folder, err := dataprovider.GetFolderByName(p.sender)
	if err != nil {
		return nil, fmt.Errorf("error getting folder %q: %w", p.sender, err)
	}
	return []vfs.BaseVirtualFolder{folder}, nil
}

func (p *EventParams) getCompressedDataRetentionReport() ([]byte, error) {
	if len(p.retentionChecks) == 0 {
		return nil, errors.New("no data retention report available")
	}
	var b bytes.Buffer
	if _, err := p.writeCompressedDataRetentionReports(&b); err != nil {
		return nil, err
	}
	return b.Bytes(), nil
}

func (p *EventParams) writeCompressedDataRetentionReports(w io.Writer) (int64, error) {
	var n int64
	wr := zip.NewWriter(w)

	for _, check := range p.retentionChecks {
		data, err := getCSVRetentionReport(check.Results)
		if err != nil {
			return n, fmt.Errorf("unable to get CSV report: %w", err)
		}
		dataSize := int64(len(data))
		n += dataSize
		// we suppose a 3:1 compression ratio
		if n > (maxAttachmentsSize * 3) {
			eventManagerLog(logger.LevelError, "unable to get retention report, size too large: %s",
				util.ByteCountIEC(n))
			return n, fmt.Errorf("unable to get retention report, size too large: %s", util.ByteCountIEC(n))
		}

		fh := &zip.FileHeader{
			Name:     fmt.Sprintf("%s-%s.csv", check.ActionName, check.Username),
			Method:   zip.Deflate,
			Modified: time.Now().UTC(),
		}
		f, err := wr.CreateHeader(fh)
		if err != nil {
			return n, fmt.Errorf("unable to create zip header for file %q: %w", fh.Name, err)
		}
		_, err = io.CopyN(f, bytes.NewBuffer(data), dataSize)
		if err != nil {
			return n, fmt.Errorf("unable to write content to zip file %q: %w", fh.Name, err)
		}
	}
	if err := wr.Close(); err != nil {
		return n, fmt.Errorf("unable to close zip writer: %w", err)
	}
	return n, nil
}

func (p *EventParams) getRetentionReportsAsMailAttachment() (*mail.File, error) {
	if len(p.retentionChecks) == 0 {
		return nil, errors.New("no data retention report available")
	}
	return &mail.File{
		Name:   "retention-reports.zip",
		Header: make(map[string][]string),
		Writer: p.writeCompressedDataRetentionReports,
	}, nil
}

func (*EventParams) getStringReplacement(val string, jsonEscaped bool) string {
	if jsonEscaped {
		return util.JSONEscape(val)
	}
	return val
}

func (p *EventParams) getStringReplacements(addObjectData, jsonEscaped bool) []string {
	replacements := []string{
		"{{Name}}", p.getStringReplacement(p.Name, jsonEscaped),
		"{{Event}}", p.Event,
		"{{Status}}", fmt.Sprintf("%d", p.Status),
		"{{VirtualPath}}", p.getStringReplacement(p.VirtualPath, jsonEscaped),
		"{{FsPath}}", p.getStringReplacement(p.FsPath, jsonEscaped),
		"{{VirtualTargetPath}}", p.getStringReplacement(p.VirtualTargetPath, jsonEscaped),
		"{{FsTargetPath}}", p.getStringReplacement(p.FsTargetPath, jsonEscaped),
		"{{ObjectName}}", p.getStringReplacement(p.ObjectName, jsonEscaped),
		"{{ObjectType}}", p.ObjectType,
		"{{FileSize}}", fmt.Sprintf("%d", p.FileSize),
		"{{Elapsed}}", fmt.Sprintf("%d", p.Elapsed),
		"{{Protocol}}", p.Protocol,
		"{{IP}}", p.IP,
		"{{Role}}", p.getStringReplacement(p.Role, jsonEscaped),
		"{{Timestamp}}", fmt.Sprintf("%d", p.Timestamp),
		"{{StatusString}}", p.getStatusString(),
	}
	if p.VirtualPath != "" {
		replacements = append(replacements, "{{VirtualDirPath}}", p.getStringReplacement(path.Dir(p.VirtualPath), jsonEscaped))
	}
	if p.VirtualTargetPath != "" {
		replacements = append(replacements, "{{VirtualTargetDirPath}}", p.getStringReplacement(path.Dir(p.VirtualTargetPath), jsonEscaped))
		replacements = append(replacements, "{{TargetName}}", p.getStringReplacement(path.Base(p.VirtualTargetPath), jsonEscaped))
	}
	if len(p.errors) > 0 {
		replacements = append(replacements, "{{ErrorString}}", p.getStringReplacement(strings.Join(p.errors, ", "), jsonEscaped))
	} else {
		replacements = append(replacements, "{{ErrorString}}", "")
	}
	replacements = append(replacements, "{{ObjectData}}", "")
	if addObjectData {
		data, err := p.Object.RenderAsJSON(p.Event != operationDelete)
		if err == nil {
			replacements[len(replacements)-1] = string(data)
		}
	}
	if p.IDPCustomFields != nil {
		for k, v := range *p.IDPCustomFields {
			replacements = append(replacements, fmt.Sprintf("{{IDPField%s}}", k), p.getStringReplacement(v, jsonEscaped))
		}
	}
	return replacements
}

func getCSVRetentionReport(results []folderRetentionCheckResult) ([]byte, error) {
	var b bytes.Buffer
	csvWriter := csv.NewWriter(&b)
	err := csvWriter.Write([]string{"path", "retention (hours)", "deleted files", "deleted size (bytes)",
		"elapsed (ms)", "info", "error"})
	if err != nil {
		return nil, err
	}

	for _, result := range results {
		err = csvWriter.Write([]string{result.Path, strconv.Itoa(result.Retention), strconv.Itoa(result.DeletedFiles),
			strconv.FormatInt(result.DeletedSize, 10), strconv.FormatInt(result.Elapsed.Milliseconds(), 10),
			result.Info, result.Error})
		if err != nil {
			return nil, err
		}
	}

	csvWriter.Flush()
	err = csvWriter.Error()
	return b.Bytes(), err
}

func closeWriterAndUpdateQuota(w io.WriteCloser, conn *BaseConnection, virtualSourcePath, virtualTargetPath string,
	numFiles int, truncatedSize int64, errTransfer error, operation string, startTime time.Time,
) error {
	var fsDstPath string
	var errDstFs error
	errWrite := w.Close()
	targetPath := virtualSourcePath
	if virtualTargetPath != "" {
		targetPath = virtualTargetPath
		var fsDst vfs.Fs
		fsDst, fsDstPath, errDstFs = conn.GetFsAndResolvedPath(virtualTargetPath)
		if errTransfer != nil && errDstFs == nil {
			// try to remove a partial file on error. If this fails, we can't do anything
			errRemove := fsDst.Remove(fsDstPath, false)
			conn.Log(logger.LevelDebug, "removing partial file %q after write error, result: %v", virtualTargetPath, errRemove)
		}
	}
	info, err := conn.doStatInternal(targetPath, 0, false, false)
	if err == nil {
		updateUserQuotaAfterFileWrite(conn, targetPath, numFiles, info.Size()-truncatedSize)
		var fsSrcPath string
		var errSrcFs error
		if virtualSourcePath != "" {
			_, fsSrcPath, errSrcFs = conn.GetFsAndResolvedPath(virtualSourcePath)
		}
		if errSrcFs == nil && errDstFs == nil {
			elapsed := time.Since(startTime).Nanoseconds() / 1000000
			if errTransfer == nil {
				errTransfer = errWrite
			}
			if operation == operationCopy {
				logger.CommandLog(copyLogSender, fsSrcPath, fsDstPath, conn.User.Username, "", conn.ID, conn.protocol, -1, -1,
					"", "", "", info.Size(), conn.localAddr, conn.remoteAddr, elapsed)
			}
			ExecuteActionNotification(conn, operation, fsSrcPath, virtualSourcePath, fsDstPath, virtualTargetPath, "", info.Size(), errTransfer, elapsed) //nolint:errcheck
		}
	} else {
		eventManagerLog(logger.LevelWarn, "unable to update quota after writing %q: %v", targetPath, err)
	}
	if errTransfer != nil {
		return errTransfer
	}
	return errWrite
}

func updateUserQuotaAfterFileWrite(conn *BaseConnection, virtualPath string, numFiles int, fileSize int64) {
	vfolder, err := conn.User.GetVirtualFolderForPath(path.Dir(virtualPath))
	if err != nil {
		dataprovider.UpdateUserQuota(&conn.User, numFiles, fileSize, false) //nolint:errcheck
		return
	}
	dataprovider.UpdateVirtualFolderQuota(&vfolder.BaseVirtualFolder, numFiles, fileSize, false) //nolint:errcheck
	if vfolder.IsIncludedInUserQuota() {
		dataprovider.UpdateUserQuota(&conn.User, numFiles, fileSize, false) //nolint:errcheck
	}
}

func checkWriterPermsAndQuota(conn *BaseConnection, virtualPath string, numFiles int, expectedSize, truncatedSize int64) error {
	if numFiles == 0 {
		if !conn.User.HasPerm(dataprovider.PermOverwrite, path.Dir(virtualPath)) {
			return conn.GetPermissionDeniedError()
		}
	} else {
		if !conn.User.HasPerm(dataprovider.PermUpload, path.Dir(virtualPath)) {
			return conn.GetPermissionDeniedError()
		}
	}
	q, _ := conn.HasSpace(numFiles > 0, false, virtualPath)
	if !q.HasSpace {
		return conn.GetQuotaExceededError()
	}
	if expectedSize != -1 {
		sizeDiff := expectedSize - truncatedSize
		if sizeDiff > 0 {
			remainingSize := q.GetRemainingSize()
			if remainingSize > 0 && remainingSize < sizeDiff {
				return conn.GetQuotaExceededError()
			}
		}
	}
	return nil
}

func getFileWriter(conn *BaseConnection, virtualPath string, expectedSize int64) (io.WriteCloser, int, int64, func(), error) {
	fs, fsPath, err := conn.GetFsAndResolvedPath(virtualPath)
	if err != nil {
		return nil, 0, 0, nil, err
	}
	var truncatedSize, fileSize int64
	numFiles := 1
	isFileOverwrite := false

	info, err := fs.Lstat(fsPath)
	if err == nil {
		fileSize = info.Size()
		if info.IsDir() {
			return nil, numFiles, truncatedSize, nil, fmt.Errorf("cannot write to a directory: %q", virtualPath)
		}
		if info.Mode().IsRegular() {
			isFileOverwrite = true
			truncatedSize = fileSize
		}
		numFiles = 0
	}
	if err != nil && !fs.IsNotExist(err) {
		return nil, numFiles, truncatedSize, nil, conn.GetFsError(fs, err)
	}
	if err := checkWriterPermsAndQuota(conn, virtualPath, numFiles, expectedSize, truncatedSize); err != nil {
		return nil, numFiles, truncatedSize, nil, err
	}
	f, w, cancelFn, err := fs.Create(fsPath, 0, conn.GetCreateChecks(virtualPath, numFiles == 1))
	if err != nil {
		return nil, numFiles, truncatedSize, nil, conn.GetFsError(fs, err)
	}
	vfs.SetPathPermissions(fs, fsPath, conn.User.GetUID(), conn.User.GetGID())

	if isFileOverwrite {
		if vfs.HasTruncateSupport(fs) || vfs.IsCryptOsFs(fs) {
			updateUserQuotaAfterFileWrite(conn, virtualPath, numFiles, -fileSize)
			truncatedSize = 0
		}
	}
	if cancelFn == nil {
		cancelFn = func() {}
	}
	if f != nil {
		return f, numFiles, truncatedSize, cancelFn, nil
	}
	return w, numFiles, truncatedSize, cancelFn, nil
}

func addZipEntry(wr *zipWriterWrapper, conn *BaseConnection, entryPath, baseDir string) error {
	if entryPath == wr.Name {
		// skip the archive itself
		return nil
	}
	info, err := conn.DoStat(entryPath, 1, false)
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to add zip entry %q, stat error: %v", entryPath, err)
		return err
	}
	entryName, err := getZipEntryName(entryPath, baseDir)
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to get zip entry name: %v", err)
		return err
	}
	if _, ok := wr.Entries[entryName]; ok {
		eventManagerLog(logger.LevelInfo, "skipping duplicate zip entry %q, is dir %t", entryPath, info.IsDir())
		return nil
	}
	wr.Entries[entryName] = true
	if info.IsDir() {
		_, err = wr.Writer.CreateHeader(&zip.FileHeader{
			Name:     entryName + "/",
			Method:   zip.Deflate,
			Modified: info.ModTime(),
		})
		if err != nil {
			eventManagerLog(logger.LevelError, "unable to create zip entry %q: %v", entryPath, err)
			return fmt.Errorf("unable to create zip entry %q: %w", entryPath, err)
		}
		contents, err := conn.ListDir(entryPath)
		if err != nil {
			eventManagerLog(logger.LevelError, "unable to add zip entry %q, read dir error: %v", entryPath, err)
			return fmt.Errorf("unable to add zip entry %q: %w", entryPath, err)
		}
		for _, info := range contents {
			fullPath := util.CleanPath(path.Join(entryPath, info.Name()))
			if err := addZipEntry(wr, conn, fullPath, baseDir); err != nil {
				eventManagerLog(logger.LevelError, "unable to add zip entry: %v", err)
				return err
			}
		}
		return nil
	}
	if !info.Mode().IsRegular() {
		// we only allow regular files
		eventManagerLog(logger.LevelInfo, "skipping zip entry for non regular file %q", entryPath)
		return nil
	}
	reader, cancelFn, err := getFileReader(conn, entryPath)
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to add zip entry %q, cannot open file: %v", entryPath, err)
		return fmt.Errorf("unable to open %q: %w", entryPath, err)
	}
	defer cancelFn()
	defer reader.Close()

	f, err := wr.Writer.CreateHeader(&zip.FileHeader{
		Name:     entryName,
		Method:   zip.Deflate,
		Modified: info.ModTime(),
	})
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to create zip entry %q: %v", entryPath, err)
		return fmt.Errorf("unable to create zip entry %q: %w", entryPath, err)
	}
	_, err = io.Copy(f, reader)
	return err
}

func getZipEntryName(entryPath, baseDir string) (string, error) {
	if !strings.HasPrefix(entryPath, baseDir) {
		return "", fmt.Errorf("entry path %q is outside base dir %q", entryPath, baseDir)
	}
	entryPath = strings.TrimPrefix(entryPath, baseDir)
	return strings.TrimPrefix(entryPath, "/"), nil
}

func getFileReader(conn *BaseConnection, virtualPath string) (io.ReadCloser, func(), error) {
	if !conn.User.HasPerm(dataprovider.PermDownload, path.Dir(virtualPath)) {
		return nil, nil, conn.GetPermissionDeniedError()
	}
	fs, fsPath, err := conn.GetFsAndResolvedPath(virtualPath)
	if err != nil {
		return nil, nil, err
	}
	f, r, cancelFn, err := fs.Open(fsPath, 0)
	if err != nil {
		return nil, nil, conn.GetFsError(fs, err)
	}
	if cancelFn == nil {
		cancelFn = func() {}
	}

	if f != nil {
		return f, cancelFn, nil
	}
	return r, cancelFn, nil
}

func writeFileContent(conn *BaseConnection, virtualPath string, w io.Writer) error {
	reader, cancelFn, err := getFileReader(conn, virtualPath)
	if err != nil {
		return err
	}

	defer cancelFn()
	defer reader.Close()

	_, err = io.Copy(w, reader)
	return err
}

func getFileContentFn(conn *BaseConnection, virtualPath string, size int64) func(w io.Writer) (int64, error) {
	return func(w io.Writer) (int64, error) {
		reader, cancelFn, err := getFileReader(conn, virtualPath)
		if err != nil {
			return 0, err
		}

		defer cancelFn()
		defer reader.Close()

		return io.CopyN(w, reader, size)
	}
}

func getMailAttachments(conn *BaseConnection, attachments []string, replacer *strings.Replacer) ([]*mail.File, error) {
	var files []*mail.File
	totalSize := int64(0)

	for _, virtualPath := range replacePathsPlaceholders(attachments, replacer) {
		info, err := conn.DoStat(virtualPath, 0, false)
		if err != nil {
			return nil, fmt.Errorf("unable to get info for file %q, user %q: %w", virtualPath, conn.User.Username, err)
		}
		if !info.Mode().IsRegular() {
			return nil, fmt.Errorf("cannot attach non regular file %q", virtualPath)
		}
		totalSize += info.Size()
		if totalSize > maxAttachmentsSize {
			return nil, fmt.Errorf("unable to send files as attachment, size too large: %s", util.ByteCountIEC(totalSize))
		}
		files = append(files, &mail.File{
			Name:   path.Base(virtualPath),
			Header: make(map[string][]string),
			Writer: getFileContentFn(conn, virtualPath, info.Size()),
		})
	}
	return files, nil
}

func replaceWithReplacer(input string, replacer *strings.Replacer) string {
	if !strings.Contains(input, "{{") {
		return input
	}
	return replacer.Replace(input)
}

func checkEventConditionPattern(p dataprovider.ConditionPattern, name string) bool {
	var matched bool
	var err error
	if strings.Contains(p.Pattern, "**") {
		matched, err = doublestar.Match(p.Pattern, name)
	} else {
		matched, err = path.Match(p.Pattern, name)
	}
	if err != nil {
		eventManagerLog(logger.LevelError, "pattern matching error %q, err: %v", p.Pattern, err)
		return false
	}
	if p.InverseMatch {
		return !matched
	}
	return matched
}

func checkUserConditionOptions(user *dataprovider.User, conditions *dataprovider.ConditionOptions) bool {
	if !checkEventConditionPatterns(user.Username, conditions.Names) {
		return false
	}
	if !checkEventConditionPatterns(user.Role, conditions.RoleNames) {
		return false
	}
	if !checkEventGroupConditionPatters(user.Groups, conditions.GroupNames) {
		return false
	}
	return true
}

// checkConditionPatterns returns false if patterns are defined and no match is found
func checkEventConditionPatterns(name string, patterns []dataprovider.ConditionPattern) bool {
	if len(patterns) == 0 {
		return true
	}
	for _, p := range patterns {
		if checkEventConditionPattern(p, name) {
			return true
		}
	}

	return false
}

func checkEventGroupConditionPatters(groups []sdk.GroupMapping, patterns []dataprovider.ConditionPattern) bool {
	if len(patterns) == 0 {
		return true
	}
	for _, group := range groups {
		for _, p := range patterns {
			if checkEventConditionPattern(p, group.Name) {
				return true
			}
		}
	}

	return false
}

func getHTTPRuleActionEndpoint(c dataprovider.EventActionHTTPConfig, replacer *strings.Replacer) (string, error) {
	u, err := url.Parse(c.Endpoint)
	if err != nil {
		return "", fmt.Errorf("invalid endpoint: %w", err)
	}
	if strings.Contains(u.Path, "{{") {
		pathComponents := strings.Split(u.Path, "/")
		for idx := range pathComponents {
			part := replaceWithReplacer(pathComponents[idx], replacer)
			if part != pathComponents[idx] {
				pathComponents[idx] = url.PathEscape(part)
			}
		}
		u.Path = ""
		u = u.JoinPath(pathComponents...)
	}
	if len(c.QueryParameters) > 0 {
		q := u.Query()

		for _, keyVal := range c.QueryParameters {
			q.Add(keyVal.Key, replaceWithReplacer(keyVal.Value, replacer))
		}

		u.RawQuery = q.Encode()
	}
	return u.String(), nil
}

func writeHTTPPart(m *multipart.Writer, part dataprovider.HTTPPart, h textproto.MIMEHeader,
	conn *BaseConnection, replacer *strings.Replacer, params *EventParams, addObjectData bool,
) error {
	partWriter, err := m.CreatePart(h)
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to create part %q, err: %v", part.Name, err)
		return err
	}
	if part.Body != "" {
		cType := h.Get("Content-Type")
		if strings.Contains(strings.ToLower(cType), "application/json") {
			replacements := params.getStringReplacements(addObjectData, true)
			jsonReplacer := strings.NewReplacer(replacements...)
			_, err = partWriter.Write([]byte(replaceWithReplacer(part.Body, jsonReplacer)))
		} else {
			_, err = partWriter.Write([]byte(replaceWithReplacer(part.Body, replacer)))
		}
		if err != nil {
			eventManagerLog(logger.LevelError, "unable to write part %q, err: %v", part.Name, err)
			return err
		}
		return nil
	}
	if part.Filepath == dataprovider.RetentionReportPlaceHolder {
		data, err := params.getCompressedDataRetentionReport()
		if err != nil {
			return err
		}
		_, err = partWriter.Write(data)
		if err != nil {
			eventManagerLog(logger.LevelError, "unable to write part %q, err: %v", part.Name, err)
			return err
		}
		return nil
	}
	err = writeFileContent(conn, util.CleanPath(replacer.Replace(part.Filepath)), partWriter)
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to write file part %q, err: %v", part.Name, err)
		return err
	}
	return nil
}

func getHTTPRuleActionBody(c *dataprovider.EventActionHTTPConfig, replacer *strings.Replacer,
	cancel context.CancelFunc, user dataprovider.User, params *EventParams, addObjectData bool,
) (io.ReadCloser, string, error) {
	var body io.ReadCloser
	if c.Method == http.MethodGet {
		return body, "", nil
	}
	if c.Body != "" {
		if c.Body == dataprovider.RetentionReportPlaceHolder {
			data, err := params.getCompressedDataRetentionReport()
			if err != nil {
				return body, "", err
			}
			return io.NopCloser(bytes.NewBuffer(data)), "", nil
		}
		if c.HasJSONBody() {
			replacements := params.getStringReplacements(addObjectData, true)
			jsonReplacer := strings.NewReplacer(replacements...)
			return io.NopCloser(bytes.NewBufferString(replaceWithReplacer(c.Body, jsonReplacer))), "", nil
		}
		return io.NopCloser(bytes.NewBufferString(replaceWithReplacer(c.Body, replacer))), "", nil
	}
	if len(c.Parts) > 0 {
		r, w := io.Pipe()
		m := multipart.NewWriter(w)

		var conn *BaseConnection
		if user.Username != "" {
			var err error
			user, err = getUserForEventAction(user)
			if err != nil {
				return body, "", err
			}
			connectionID := fmt.Sprintf("%s_%s", protocolEventAction, xid.New().String())
			err = user.CheckFsRoot(connectionID)
			if err != nil {
				user.CloseFs() //nolint:errcheck
				return body, "", fmt.Errorf("error getting multipart file/s, unable to check root fs for user %q: %w",
					user.Username, err)
			}
			conn = NewBaseConnection(connectionID, protocolEventAction, "", "", user)
		}

		go func() {
			defer w.Close()
			defer user.CloseFs() //nolint:errcheck

			for _, part := range c.Parts {
				h := make(textproto.MIMEHeader)
				if part.Body != "" {
					h.Set("Content-Disposition", fmt.Sprintf(`form-data; name="%s"`, multipartQuoteEscaper.Replace(part.Name)))
				} else {
					h.Set("Content-Disposition",
						fmt.Sprintf(`form-data; name="%s"; filename="%s"`,
							multipartQuoteEscaper.Replace(part.Name), multipartQuoteEscaper.Replace(path.Base(part.Filepath))))
					contentType := mime.TypeByExtension(path.Ext(part.Filepath))
					if contentType == "" {
						contentType = "application/octet-stream"
					}
					h.Set("Content-Type", contentType)
				}
				for _, keyVal := range part.Headers {
					h.Set(keyVal.Key, replaceWithReplacer(keyVal.Value, replacer))
				}
				if err := writeHTTPPart(m, part, h, conn, replacer, params, addObjectData); err != nil {
					cancel()
					return
				}
			}
			m.Close()
		}()

		return r, m.FormDataContentType(), nil
	}
	return body, "", nil
}

func executeHTTPRuleAction(c dataprovider.EventActionHTTPConfig, params *EventParams) error {
	if err := c.TryDecryptPassword(); err != nil {
		return err
	}
	addObjectData := false
	if params.Object != nil {
		addObjectData = c.HasObjectData()
	}

	replacements := params.getStringReplacements(addObjectData, false)
	replacer := strings.NewReplacer(replacements...)
	endpoint, err := getHTTPRuleActionEndpoint(c, replacer)
	if err != nil {
		return err
	}

	ctx, cancel := c.GetContext()
	defer cancel()

	var user dataprovider.User
	if c.HasMultipartFiles() {
		user, err = params.getUserFromSender()
		if err != nil {
			return err
		}
	}
	body, contentType, err := getHTTPRuleActionBody(&c, replacer, cancel, user, params, addObjectData)
	if err != nil {
		return err
	}
	if body != nil {
		defer body.Close()
	}
	req, err := http.NewRequestWithContext(ctx, c.Method, endpoint, body)
	if err != nil {
		return err
	}
	if contentType != "" {
		req.Header.Set("Content-Type", contentType)
	}
	if c.Username != "" {
		req.SetBasicAuth(replaceWithReplacer(c.Username, replacer), c.Password.GetPayload())
	}
	for _, keyVal := range c.Headers {
		req.Header.Set(keyVal.Key, replaceWithReplacer(keyVal.Value, replacer))
	}
	client := c.GetHTTPClient()
	defer client.CloseIdleConnections()

	startTime := time.Now()
	resp, err := client.Do(req)
	if err != nil {
		eventManagerLog(logger.LevelDebug, "unable to send http notification, endpoint: %s, elapsed: %s, err: %v",
			endpoint, time.Since(startTime), err)
		return fmt.Errorf("error sending HTTP request: %w", err)
	}
	defer resp.Body.Close()

	eventManagerLog(logger.LevelDebug, "http notification sent, endpoint: %s, elapsed: %s, status code: %d",
		endpoint, time.Since(startTime), resp.StatusCode)
	if resp.StatusCode < http.StatusOK || resp.StatusCode > http.StatusNoContent {
		return fmt.Errorf("unexpected status code: %d", resp.StatusCode)
	}

	return nil
}

func executeCommandRuleAction(c dataprovider.EventActionCommandConfig, params *EventParams) error {
	addObjectData := false
	if params.Object != nil {
		for _, k := range c.EnvVars {
			if strings.Contains(k.Value, "{{ObjectData}}") {
				addObjectData = true
				break
			}
		}
	}
	replacements := params.getStringReplacements(addObjectData, false)
	replacer := strings.NewReplacer(replacements...)

	args := make([]string, 0, len(c.Args))
	for _, arg := range c.Args {
		args = append(args, replaceWithReplacer(arg, replacer))
	}

	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(c.Timeout)*time.Second)
	defer cancel()

	cmd := exec.CommandContext(ctx, c.Cmd, args...)
	cmd.Env = []string{}
	for _, keyVal := range c.EnvVars {
		cmd.Env = append(cmd.Env, fmt.Sprintf("%s=%s", keyVal.Key, replaceWithReplacer(keyVal.Value, replacer)))
	}

	startTime := time.Now()
	err := cmd.Run()

	eventManagerLog(logger.LevelDebug, "executed command %q, elapsed: %s, error: %v",
		c.Cmd, time.Since(startTime), err)

	return err
}

func executeEmailRuleAction(c dataprovider.EventActionEmailConfig, params *EventParams) error {
	addObjectData := false
	if params.Object != nil {
		if strings.Contains(c.Body, "{{ObjectData}}") {
			addObjectData = true
		}
	}
	replacements := params.getStringReplacements(addObjectData, false)
	replacer := strings.NewReplacer(replacements...)
	body := replaceWithReplacer(c.Body, replacer)
	subject := replaceWithReplacer(c.Subject, replacer)
	recipients := make([]string, 0, len(c.Recipients))
	for _, recipient := range c.Recipients {
		recipients = append(recipients, replaceWithReplacer(recipient, replacer))
	}
	startTime := time.Now()
	var files []*mail.File
	fileAttachments := make([]string, 0, len(c.Attachments))
	for _, attachment := range c.Attachments {
		if attachment == dataprovider.RetentionReportPlaceHolder {
			f, err := params.getRetentionReportsAsMailAttachment()
			if err != nil {
				return err
			}
			files = append(files, f)
			continue
		}
		fileAttachments = append(fileAttachments, attachment)
	}
	if len(fileAttachments) > 0 {
		user, err := params.getUserFromSender()
		if err != nil {
			return err
		}
		user, err = getUserForEventAction(user)
		if err != nil {
			return err
		}
		connectionID := fmt.Sprintf("%s_%s", protocolEventAction, xid.New().String())
		err = user.CheckFsRoot(connectionID)
		defer user.CloseFs() //nolint:errcheck
		if err != nil {
			return fmt.Errorf("error getting email attachments, unable to check root fs for user %q: %w", user.Username, err)
		}
		conn := NewBaseConnection(connectionID, protocolEventAction, "", "", user)
		res, err := getMailAttachments(conn, fileAttachments, replacer)
		if err != nil {
			return err
		}
		files = append(files, res...)
	}
	err := smtp.SendEmail(recipients, subject, body, smtp.EmailContentTypeTextPlain, files...)
	eventManagerLog(logger.LevelDebug, "executed email notification action, elapsed: %s, error: %v",
		time.Since(startTime), err)
	if err != nil {
		return fmt.Errorf("unable to send email: %w", err)
	}
	return nil
}

func getUserForEventAction(user dataprovider.User) (dataprovider.User, error) {
	err := user.LoadAndApplyGroupSettings()
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to get group for user %q: %+v", user.Username, err)
		return dataprovider.User{}, fmt.Errorf("unable to get groups for user %q", user.Username)
	}
	user.UploadDataTransfer = 0
	user.UploadBandwidth = 0
	user.DownloadBandwidth = 0
	user.Filters.DisableFsChecks = false
	user.Filters.FilePatterns = nil
	user.Filters.BandwidthLimits = nil
	user.Filters.DataTransferLimits = nil
	for k := range user.Permissions {
		user.Permissions[k] = []string{dataprovider.PermAny}
	}
	return user, nil
}

func replacePathsPlaceholders(paths []string, replacer *strings.Replacer) []string {
	results := make([]string, 0, len(paths))
	for _, p := range paths {
		results = append(results, util.CleanPath(replaceWithReplacer(p, replacer)))
	}
	return util.RemoveDuplicates(results, false)
}

func executeDeleteFileFsAction(conn *BaseConnection, item string, info os.FileInfo) error {
	fs, fsPath, err := conn.GetFsAndResolvedPath(item)
	if err != nil {
		return err
	}
	return conn.RemoveFile(fs, fsPath, item, info)
}

func executeDeleteFsActionForUser(deletes []string, replacer *strings.Replacer, user dataprovider.User) error {
	user, err := getUserForEventAction(user)
	if err != nil {
		return err
	}
	connectionID := fmt.Sprintf("%s_%s", protocolEventAction, xid.New().String())
	err = user.CheckFsRoot(connectionID)
	defer user.CloseFs() //nolint:errcheck
	if err != nil {
		return fmt.Errorf("delete error, unable to check root fs for user %q: %w", user.Username, err)
	}
	conn := NewBaseConnection(connectionID, protocolEventAction, "", "", user)
	for _, item := range replacePathsPlaceholders(deletes, replacer) {
		info, err := conn.DoStat(item, 0, false)
		if err != nil {
			if conn.IsNotExistError(err) {
				continue
			}
			return fmt.Errorf("unable to check item to delete %q, user %q: %w", item, user.Username, err)
		}
		if info.IsDir() {
			if err = conn.RemoveDir(item); err != nil {
				return fmt.Errorf("unable to remove dir %q, user %q: %w", item, user.Username, err)
			}
		} else {
			if err = executeDeleteFileFsAction(conn, item, info); err != nil {
				return fmt.Errorf("unable to remove file %q, user %q: %w", item, user.Username, err)
			}
		}
		eventManagerLog(logger.LevelDebug, "item %q removed for user %q", item, user.Username)
	}
	return nil
}

func executeDeleteFsRuleAction(deletes []string, replacer *strings.Replacer,
	conditions dataprovider.ConditionOptions, params *EventParams,
) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	executed := 0
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping fs delete for user %s, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if err = executeDeleteFsActionForUser(deletes, replacer, user); err != nil {
			params.AddError(err)
			failures = append(failures, user.Username)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("fs delete failed for users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no delete executed")
		return errors.New("no delete executed")
	}
	return nil
}

func executeMkDirsFsActionForUser(dirs []string, replacer *strings.Replacer, user dataprovider.User) error {
	user, err := getUserForEventAction(user)
	if err != nil {
		return err
	}
	connectionID := fmt.Sprintf("%s_%s", protocolEventAction, xid.New().String())
	err = user.CheckFsRoot(connectionID)
	defer user.CloseFs() //nolint:errcheck
	if err != nil {
		return fmt.Errorf("mkdir error, unable to check root fs for user %q: %w", user.Username, err)
	}
	conn := NewBaseConnection(connectionID, protocolEventAction, "", "", user)
	for _, item := range replacePathsPlaceholders(dirs, replacer) {
		if err = conn.CheckParentDirs(path.Dir(item)); err != nil {
			return fmt.Errorf("unable to check parent dirs for %q, user %q: %w", item, user.Username, err)
		}
		if err = conn.createDirIfMissing(item); err != nil {
			return fmt.Errorf("unable to create dir %q, user %q: %w", item, user.Username, err)
		}
		eventManagerLog(logger.LevelDebug, "directory %q created for user %q", item, user.Username)
	}
	return nil
}

func executeMkdirFsRuleAction(dirs []string, replacer *strings.Replacer,
	conditions dataprovider.ConditionOptions, params *EventParams,
) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	executed := 0
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping fs mkdir for user %s, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if err = executeMkDirsFsActionForUser(dirs, replacer, user); err != nil {
			failures = append(failures, user.Username)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("fs mkdir failed for users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no mkdir executed")
		return errors.New("no mkdir executed")
	}
	return nil
}

func executeRenameFsActionForUser(renames []dataprovider.KeyValue, replacer *strings.Replacer,
	user dataprovider.User,
) error {
	user, err := getUserForEventAction(user)
	if err != nil {
		return err
	}
	connectionID := fmt.Sprintf("%s_%s", protocolEventAction, xid.New().String())
	err = user.CheckFsRoot(connectionID)
	defer user.CloseFs() //nolint:errcheck
	if err != nil {
		return fmt.Errorf("rename error, unable to check root fs for user %q: %w", user.Username, err)
	}
	conn := NewBaseConnection(connectionID, protocolEventAction, "", "", user)
	for _, item := range renames {
		source := util.CleanPath(replaceWithReplacer(item.Key, replacer))
		target := util.CleanPath(replaceWithReplacer(item.Value, replacer))
		if err = conn.renameInternal(source, target, true); err != nil {
			return fmt.Errorf("unable to rename %q->%q, user %q: %w", source, target, user.Username, err)
		}
		eventManagerLog(logger.LevelDebug, "rename %q->%q ok, user %q", source, target, user.Username)
	}
	return nil
}

func executeCopyFsActionForUser(copy []dataprovider.KeyValue, replacer *strings.Replacer,
	user dataprovider.User,
) error {
	user, err := getUserForEventAction(user)
	if err != nil {
		return err
	}
	connectionID := fmt.Sprintf("%s_%s", protocolEventAction, xid.New().String())
	err = user.CheckFsRoot(connectionID)
	defer user.CloseFs() //nolint:errcheck
	if err != nil {
		return fmt.Errorf("copy error, unable to check root fs for user %q: %w", user.Username, err)
	}
	conn := NewBaseConnection(connectionID, protocolEventAction, "", "", user)
	for _, item := range copy {
		source := util.CleanPath(replaceWithReplacer(item.Key, replacer))
		target := util.CleanPath(replaceWithReplacer(item.Value, replacer))
		if strings.HasSuffix(item.Key, "/") {
			source += "/"
		}
		if strings.HasSuffix(item.Value, "/") {
			target += "/"
		}
		if err = conn.Copy(source, target); err != nil {
			return fmt.Errorf("unable to copy %q->%q, user %q: %w", source, target, user.Username, err)
		}
		eventManagerLog(logger.LevelDebug, "copy %q->%q ok, user %q", source, target, user.Username)
	}
	return nil
}

func executeExistFsActionForUser(exist []string, replacer *strings.Replacer,
	user dataprovider.User,
) error {
	user, err := getUserForEventAction(user)
	if err != nil {
		return err
	}
	connectionID := fmt.Sprintf("%s_%s", protocolEventAction, xid.New().String())
	err = user.CheckFsRoot(connectionID)
	defer user.CloseFs() //nolint:errcheck
	if err != nil {
		return fmt.Errorf("existence check error, unable to check root fs for user %q: %w", user.Username, err)
	}
	conn := NewBaseConnection(connectionID, protocolEventAction, "", "", user)
	for _, item := range replacePathsPlaceholders(exist, replacer) {
		if _, err = conn.DoStat(item, 0, false); err != nil {
			return fmt.Errorf("error checking existence for path %q, user %q: %w", item, user.Username, err)
		}
		eventManagerLog(logger.LevelDebug, "path %q exists for user %q", item, user.Username)
	}
	return nil
}

func executeRenameFsRuleAction(renames []dataprovider.KeyValue, replacer *strings.Replacer,
	conditions dataprovider.ConditionOptions, params *EventParams,
) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	executed := 0
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping fs rename for user %s, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if err = executeRenameFsActionForUser(renames, replacer, user); err != nil {
			failures = append(failures, user.Username)
			params.AddError(err)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("fs rename failed for users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no rename executed")
		return errors.New("no rename executed")
	}
	return nil
}

func executeCopyFsRuleAction(copy []dataprovider.KeyValue, replacer *strings.Replacer,
	conditions dataprovider.ConditionOptions, params *EventParams,
) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	var executed int
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping fs copy for user %s, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if err = executeCopyFsActionForUser(copy, replacer, user); err != nil {
			failures = append(failures, user.Username)
			params.AddError(err)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("fs copy failed for users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no copy executed")
		return errors.New("no copy executed")
	}
	return nil
}

func getArchiveBaseDir(paths []string) string {
	var parentDirs []string
	for _, p := range paths {
		parentDirs = append(parentDirs, path.Dir(p))
	}
	parentDirs = util.RemoveDuplicates(parentDirs, false)
	baseDir := "/"
	if len(parentDirs) == 1 {
		baseDir = parentDirs[0]
	}
	return baseDir
}

func getSizeForPath(conn *BaseConnection, p string, info os.FileInfo) (int64, error) {
	if info.IsDir() {
		var dirSize int64
		entries, err := conn.ListDir(p)
		if err != nil {
			return 0, err
		}
		for _, entry := range entries {
			size, err := getSizeForPath(conn, path.Join(p, entry.Name()), entry)
			if err != nil {
				return 0, err
			}
			dirSize += size
		}
		return dirSize, nil
	}
	if info.Mode().IsRegular() {
		return info.Size(), nil
	}
	return 0, nil
}

func estimateZipSize(conn *BaseConnection, zipPath string, paths []string) (int64, error) {
	q, _ := conn.HasSpace(false, false, zipPath)
	if q.HasSpace && q.GetRemainingSize() > 0 {
		var size int64
		for _, item := range paths {
			info, err := conn.DoStat(item, 1, false)
			if err != nil {
				return size, err
			}
			itemSize, err := getSizeForPath(conn, item, info)
			if err != nil {
				return size, err
			}
			size += itemSize
		}
		eventManagerLog(logger.LevelDebug, "archive paths %v, archive name %q, size: %d", paths, zipPath, size)
		// we assume the zip size will be half of the real size
		return size / 2, nil
	}
	return -1, nil
}

func executeCompressFsActionForUser(c dataprovider.EventActionFsCompress, replacer *strings.Replacer,
	user dataprovider.User,
) error {
	user, err := getUserForEventAction(user)
	if err != nil {
		return err
	}
	connectionID := fmt.Sprintf("%s_%s", protocolEventAction, xid.New().String())
	err = user.CheckFsRoot(connectionID)
	defer user.CloseFs() //nolint:errcheck
	if err != nil {
		return fmt.Errorf("compress error, unable to check root fs for user %q: %w", user.Username, err)
	}
	conn := NewBaseConnection(connectionID, protocolEventAction, "", "", user)
	name := util.CleanPath(replaceWithReplacer(c.Name, replacer))
	conn.CheckParentDirs(path.Dir(name)) //nolint:errcheck
	paths := make([]string, 0, len(c.Paths))
	for idx := range c.Paths {
		p := util.CleanPath(replaceWithReplacer(c.Paths[idx], replacer))
		if p == name {
			return fmt.Errorf("cannot compress the archive to create: %q", name)
		}
		paths = append(paths, p)
	}
	paths = util.RemoveDuplicates(paths, false)
	estimatedSize, err := estimateZipSize(conn, name, paths)
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to estimate size for archive %q: %v", name, err)
		return fmt.Errorf("unable to estimate archive size: %w", err)
	}
	writer, numFiles, truncatedSize, cancelFn, err := getFileWriter(conn, name, estimatedSize)
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to create archive %q: %v", name, err)
		return fmt.Errorf("unable to create archive: %w", err)
	}
	defer cancelFn()

	baseDir := getArchiveBaseDir(paths)
	eventManagerLog(logger.LevelDebug, "creating archive %q for paths %+v", name, paths)

	zipWriter := &zipWriterWrapper{
		Name:    name,
		Writer:  zip.NewWriter(writer),
		Entries: make(map[string]bool),
	}
	startTime := time.Now()
	for _, item := range paths {
		if err := addZipEntry(zipWriter, conn, item, baseDir); err != nil {
			closeWriterAndUpdateQuota(writer, conn, name, "", numFiles, truncatedSize, err, operationUpload, startTime) //nolint:errcheck
			return err
		}
	}
	if err := zipWriter.Writer.Close(); err != nil {
		eventManagerLog(logger.LevelError, "unable to close zip file %q: %v", name, err)
		closeWriterAndUpdateQuota(writer, conn, name, "", numFiles, truncatedSize, err, operationUpload, startTime) //nolint:errcheck
		return fmt.Errorf("unable to close zip file %q: %w", name, err)
	}
	return closeWriterAndUpdateQuota(writer, conn, name, "", numFiles, truncatedSize, err, operationUpload, startTime)
}

func executeExistFsRuleAction(exist []string, replacer *strings.Replacer, conditions dataprovider.ConditionOptions,
	params *EventParams,
) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	executed := 0
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping fs exist for user %s, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if err = executeExistFsActionForUser(exist, replacer, user); err != nil {
			failures = append(failures, user.Username)
			params.AddError(err)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("fs existence check failed for users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no existence check executed")
		return errors.New("no existence check executed")
	}
	return nil
}

func executeCompressFsRuleAction(c dataprovider.EventActionFsCompress, replacer *strings.Replacer,
	conditions dataprovider.ConditionOptions, params *EventParams,
) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	executed := 0
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping fs compress for user %s, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if err = executeCompressFsActionForUser(c, replacer, user); err != nil {
			failures = append(failures, user.Username)
			params.AddError(err)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("fs compress failed for users: %s", strings.Join(failures, ","))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no file/folder compressed")
		return errors.New("no file/folder compressed")
	}
	return nil
}

func executeFsRuleAction(c dataprovider.EventActionFilesystemConfig, conditions dataprovider.ConditionOptions,
	params *EventParams,
) error {
	addObjectData := false
	replacements := params.getStringReplacements(addObjectData, false)
	replacer := strings.NewReplacer(replacements...)
	switch c.Type {
	case dataprovider.FilesystemActionRename:
		return executeRenameFsRuleAction(c.Renames, replacer, conditions, params)
	case dataprovider.FilesystemActionDelete:
		return executeDeleteFsRuleAction(c.Deletes, replacer, conditions, params)
	case dataprovider.FilesystemActionMkdirs:
		return executeMkdirFsRuleAction(c.MkDirs, replacer, conditions, params)
	case dataprovider.FilesystemActionExist:
		return executeExistFsRuleAction(c.Exist, replacer, conditions, params)
	case dataprovider.FilesystemActionCompress:
		return executeCompressFsRuleAction(c.Compress, replacer, conditions, params)
	case dataprovider.FilesystemActionCopy:
		return executeCopyFsRuleAction(c.Copy, replacer, conditions, params)
	default:
		return fmt.Errorf("unsupported filesystem action %d", c.Type)
	}
}

func executeQuotaResetForUser(user *dataprovider.User) error {
	if err := user.LoadAndApplyGroupSettings(); err != nil {
		eventManagerLog(logger.LevelError, "skipping scheduled quota reset for user %s, cannot apply group settings: %v",
			user.Username, err)
		return err
	}
	if !QuotaScans.AddUserQuotaScan(user.Username, user.Role) {
		eventManagerLog(logger.LevelError, "another quota scan is already in progress for user %q", user.Username)
		return fmt.Errorf("another quota scan is in progress for user %q", user.Username)
	}
	defer QuotaScans.RemoveUserQuotaScan(user.Username)

	numFiles, size, err := user.ScanQuota()
	if err != nil {
		eventManagerLog(logger.LevelError, "error scanning quota for user %q: %v", user.Username, err)
		return fmt.Errorf("error scanning quota for user %q: %w", user.Username, err)
	}
	err = dataprovider.UpdateUserQuota(user, numFiles, size, true)
	if err != nil {
		eventManagerLog(logger.LevelError, "error updating quota for user %q: %v", user.Username, err)
		return fmt.Errorf("error updating quota for user %q: %w", user.Username, err)
	}
	return nil
}

func executeUsersQuotaResetRuleAction(conditions dataprovider.ConditionOptions, params *EventParams) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	executed := 0
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping quota reset for user %q, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if err = executeQuotaResetForUser(&user); err != nil {
			params.AddError(err)
			failures = append(failures, user.Username)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("quota reset failed for users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no user quota reset executed")
		return errors.New("no user quota reset executed")
	}
	return nil
}

func executeFoldersQuotaResetRuleAction(conditions dataprovider.ConditionOptions, params *EventParams) error {
	folders, err := params.getFolders()
	if err != nil {
		return fmt.Errorf("unable to get folders: %w", err)
	}
	var failures []string
	executed := 0
	for _, folder := range folders {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" && !checkEventConditionPatterns(folder.Name, conditions.Names) {
			eventManagerLog(logger.LevelDebug, "skipping scheduled quota reset for folder %s, name conditions don't match",
				folder.Name)
			continue
		}
		if !QuotaScans.AddVFolderQuotaScan(folder.Name) {
			eventManagerLog(logger.LevelError, "another quota scan is already in progress for folder %q", folder.Name)
			params.AddError(fmt.Errorf("another quota scan is already in progress for folder %q", folder.Name))
			failures = append(failures, folder.Name)
			continue
		}
		executed++
		f := vfs.VirtualFolder{
			BaseVirtualFolder: folder,
			VirtualPath:       "/",
		}
		numFiles, size, err := f.ScanQuota()
		QuotaScans.RemoveVFolderQuotaScan(folder.Name)
		if err != nil {
			eventManagerLog(logger.LevelError, "error scanning quota for folder %q: %v", folder.Name, err)
			params.AddError(fmt.Errorf("error scanning quota for folder %q: %w", folder.Name, err))
			failures = append(failures, folder.Name)
			continue
		}
		err = dataprovider.UpdateVirtualFolderQuota(&folder, numFiles, size, true)
		if err != nil {
			eventManagerLog(logger.LevelError, "error updating quota for folder %q: %v", folder.Name, err)
			params.AddError(fmt.Errorf("error updating quota for folder %q: %w", folder.Name, err))
			failures = append(failures, folder.Name)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("quota reset failed for folders: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no folder quota reset executed")
		return errors.New("no folder quota reset executed")
	}
	return nil
}

func executeTransferQuotaResetRuleAction(conditions dataprovider.ConditionOptions, params *EventParams) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	executed := 0
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping scheduled transfer quota reset for user %s, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		err = dataprovider.UpdateUserTransferQuota(&user, 0, 0, true)
		if err != nil {
			eventManagerLog(logger.LevelError, "error updating transfer quota for user %q: %v", user.Username, err)
			params.AddError(fmt.Errorf("error updating transfer quota for user %q: %w", user.Username, err))
			failures = append(failures, user.Username)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("transfer quota reset failed for users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no transfer quota reset executed")
		return errors.New("no transfer quota reset executed")
	}
	return nil
}

func executeDataRetentionCheckForUser(user dataprovider.User, folders []dataprovider.FolderRetention,
	params *EventParams, actionName string,
) error {
	if err := user.LoadAndApplyGroupSettings(); err != nil {
		eventManagerLog(logger.LevelError, "skipping scheduled retention check for user %s, cannot apply group settings: %v",
			user.Username, err)
		return err
	}
	check := RetentionCheck{
		Folders: folders,
	}
	c := RetentionChecks.Add(check, &user)
	if c == nil {
		eventManagerLog(logger.LevelError, "another retention check is already in progress for user %q", user.Username)
		return fmt.Errorf("another retention check is in progress for user %q", user.Username)
	}
	defer func() {
		params.retentionChecks = append(params.retentionChecks, executedRetentionCheck{
			Username:   user.Username,
			ActionName: actionName,
			Results:    c.results,
		})
	}()
	if err := c.Start(); err != nil {
		eventManagerLog(logger.LevelError, "error checking retention for user %q: %v", user.Username, err)
		return fmt.Errorf("error checking retention for user %q: %w", user.Username, err)
	}
	return nil
}

func executeDataRetentionCheckRuleAction(config dataprovider.EventActionDataRetentionConfig,
	conditions dataprovider.ConditionOptions, params *EventParams, actionName string,
) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	executed := 0
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping scheduled retention check for user %s, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if err = executeDataRetentionCheckForUser(user, config.Folders, params, actionName); err != nil {
			failures = append(failures, user.Username)
			params.AddError(err)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("retention check failed for users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no retention check executed")
		return errors.New("no retention check executed")
	}
	return nil
}

func executeUserExpirationCheckRuleAction(conditions dataprovider.ConditionOptions, params *EventParams) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	var executed int
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping expiration check for user %q, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if user.ExpirationDate > 0 {
			expDate := util.GetTimeFromMsecSinceEpoch(user.ExpirationDate)
			if expDate.Before(time.Now()) {
				failures = append(failures, user.Username)
			}
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("expired users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no user expiration check executed")
		return errors.New("no user expiration check executed")
	}
	return nil
}

func executeMetadataCheckForUser(user *dataprovider.User) error {
	if err := user.LoadAndApplyGroupSettings(); err != nil {
		eventManagerLog(logger.LevelError, "skipping scheduled quota reset for user %s, cannot apply group settings: %v",
			user.Username, err)
		return err
	}
	if !ActiveMetadataChecks.Add(user.Username, user.Role) {
		eventManagerLog(logger.LevelError, "another metadata check is already in progress for user %q", user.Username)
		return fmt.Errorf("another metadata check is in progress for user %q", user.Username)
	}
	defer ActiveMetadataChecks.Remove(user.Username)

	if err := user.CheckMetadataConsistency(); err != nil {
		eventManagerLog(logger.LevelError, "error checking metadata consistence for user %q: %v", user.Username, err)
		return fmt.Errorf("error checking metadata consistence for user %q: %w", user.Username, err)
	}
	return nil
}

func executeMetadataCheckRuleAction(conditions dataprovider.ConditionOptions, params *EventParams) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	var executed int
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping metadata check for user %q, condition options don't match",
					user.Username)
				continue
			}
		}
		executed++
		if err = executeMetadataCheckForUser(&user); err != nil {
			params.AddError(err)
			failures = append(failures, user.Username)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("metadata check failed for users: %s", strings.Join(failures, ", "))
	}
	if executed == 0 {
		eventManagerLog(logger.LevelError, "no metadata check executed")
		return errors.New("no metadata check executed")
	}
	return nil
}

func executePwdExpirationCheckForUser(user *dataprovider.User, config dataprovider.EventActionPasswordExpiration) error {
	if err := user.LoadAndApplyGroupSettings(); err != nil {
		eventManagerLog(logger.LevelError, "skipping password expiration check for user %q, cannot apply group settings: %v",
			user.Username, err)
		return err
	}
	if user.ExpirationDate > 0 {
		if expDate := util.GetTimeFromMsecSinceEpoch(user.ExpirationDate); expDate.Before(time.Now()) {
			eventManagerLog(logger.LevelDebug, "skipping password expiration check for expired user %q, expiration date: %s",
				user.Username, expDate)
			return nil
		}
	}
	if user.Filters.PasswordExpiration == 0 {
		eventManagerLog(logger.LevelDebug, "password expiration not set for user %q skipping check", user.Username)
		return nil
	}
	days := user.PasswordExpiresIn()
	if days > config.Threshold {
		eventManagerLog(logger.LevelDebug, "password for user %q expires in %d days, threshold %d, no need to notify",
			user.Username, days, config.Threshold)
		return nil
	}
	body := new(bytes.Buffer)
	data := make(map[string]any)
	data["Username"] = user.Username
	data["Days"] = days
	if err := smtp.RenderPasswordExpirationTemplate(body, data); err != nil {
		eventManagerLog(logger.LevelError, "unable to notify password expiration for user %s: %v",
			user.Username, err)
		return err
	}
	subject := "SFTPGo password expiration notification"
	startTime := time.Now()
	if err := smtp.SendEmail([]string{user.Email}, subject, body.String(), smtp.EmailContentTypeTextHTML); err != nil {
		eventManagerLog(logger.LevelError, "unable to notify password expiration for user %s: %v, elapsed: %s",
			user.Username, err, time.Since(startTime))
		return err
	}
	eventManagerLog(logger.LevelDebug, "password expiration email sent to user %s, days: %d, elapsed: %s",
		user.Username, days, time.Since(startTime))
	return nil
}

func executePwdExpirationCheckRuleAction(config dataprovider.EventActionPasswordExpiration, conditions dataprovider.ConditionOptions,
	params *EventParams) error {
	users, err := params.getUsers()
	if err != nil {
		return fmt.Errorf("unable to get users: %w", err)
	}
	var failures []string
	for _, user := range users {
		// if sender is set, the conditions have already been evaluated
		if params.sender == "" {
			if !checkUserConditionOptions(&user, &conditions) {
				eventManagerLog(logger.LevelDebug, "skipping password check for user %q, condition options don't match",
					user.Username)
				continue
			}
		}
		if err = executePwdExpirationCheckForUser(&user, config); err != nil {
			params.AddError(err)
			failures = append(failures, user.Username)
		}
	}
	if len(failures) > 0 {
		return fmt.Errorf("password expiration check failed for users: %s", strings.Join(failures, ", "))
	}

	return nil
}

func executeAdminCheckAction(c *dataprovider.EventActionIDPAccountCheck, params *EventParams) (*dataprovider.Admin, error) {
	admin, err := dataprovider.AdminExists(params.Name)
	exists := err == nil
	if exists && c.Mode == 1 {
		return &admin, nil
	}
	if err != nil && !errors.Is(err, util.ErrNotFound) {
		return nil, err
	}

	replacements := params.getStringReplacements(false, true)
	replacer := strings.NewReplacer(replacements...)
	data := replaceWithReplacer(c.TemplateAdmin, replacer)

	var newAdmin dataprovider.Admin
	err = json.Unmarshal([]byte(data), &newAdmin)
	if err != nil {
		return nil, err
	}
	if newAdmin.Password == "" {
		newAdmin.Password = util.GenerateUniqueID()
	}
	if exists {
		eventManagerLog(logger.LevelDebug, "updating admin %q after IDP login", params.Name)
		err = dataprovider.UpdateAdmin(&newAdmin, dataprovider.ActionExecutorSystem, "", "")
	} else {
		eventManagerLog(logger.LevelDebug, "creating admin %q after IDP login", params.Name)
		err = dataprovider.AddAdmin(&newAdmin, dataprovider.ActionExecutorSystem, "", "")
	}
	return &newAdmin, err
}

func executeUserCheckAction(c *dataprovider.EventActionIDPAccountCheck, params *EventParams) (*dataprovider.User, error) {
	user, err := dataprovider.UserExists(params.Name, "")
	exists := err == nil
	if exists && c.Mode == 1 {
		err = user.LoadAndApplyGroupSettings()
		return &user, err
	}
	if err != nil && !errors.Is(err, util.ErrNotFound) {
		return nil, err
	}
	replacements := params.getStringReplacements(false, true)
	replacer := strings.NewReplacer(replacements...)
	data := replaceWithReplacer(c.TemplateUser, replacer)

	var newUser dataprovider.User
	err = json.Unmarshal([]byte(data), &newUser)
	if err != nil {
		return nil, err
	}
	if exists {
		eventManagerLog(logger.LevelDebug, "updating user %q after IDP login", params.Name)
		err = dataprovider.UpdateUser(&newUser, dataprovider.ActionExecutorSystem, "", "")
	} else {
		eventManagerLog(logger.LevelDebug, "creating user %q after IDP login", params.Name)
		err = dataprovider.AddUser(&newUser, dataprovider.ActionExecutorSystem, "", "")
	}
	if err != nil {
		return nil, err
	}
	u, err := dataprovider.GetUserWithGroupSettings(params.Name, "")
	return &u, err
}

func executeRuleAction(action dataprovider.BaseEventAction, params *EventParams,
	conditions dataprovider.ConditionOptions,
) error {
	var err error

	switch action.Type {
	case dataprovider.ActionTypeHTTP:
		err = executeHTTPRuleAction(action.Options.HTTPConfig, params)
	case dataprovider.ActionTypeCommand:
		err = executeCommandRuleAction(action.Options.CmdConfig, params)
	case dataprovider.ActionTypeEmail:
		err = executeEmailRuleAction(action.Options.EmailConfig, params)
	case dataprovider.ActionTypeBackup:
		var backupPath string
		backupPath, err = dataprovider.ExecuteBackup()
		if err == nil {
			params.setBackupParams(backupPath)
		}
	case dataprovider.ActionTypeUserQuotaReset:
		err = executeUsersQuotaResetRuleAction(conditions, params)
	case dataprovider.ActionTypeFolderQuotaReset:
		err = executeFoldersQuotaResetRuleAction(conditions, params)
	case dataprovider.ActionTypeTransferQuotaReset:
		err = executeTransferQuotaResetRuleAction(conditions, params)
	case dataprovider.ActionTypeDataRetentionCheck:
		err = executeDataRetentionCheckRuleAction(action.Options.RetentionConfig, conditions, params, action.Name)
	case dataprovider.ActionTypeMetadataCheck:
		err = executeMetadataCheckRuleAction(conditions, params)
	case dataprovider.ActionTypeFilesystem:
		err = executeFsRuleAction(action.Options.FsConfig, conditions, params)
	case dataprovider.ActionTypePasswordExpirationCheck:
		err = executePwdExpirationCheckRuleAction(action.Options.PwdExpirationConfig, conditions, params)
	case dataprovider.ActionTypeUserExpirationCheck:
		err = executeUserExpirationCheckRuleAction(conditions, params)
	default:
		err = fmt.Errorf("unsupported action type: %d", action.Type)
	}

	if err != nil {
		err = fmt.Errorf("action %q failed: %w", action.Name, err)
	}
	params.AddError(err)
	return err
}

func executeIDPAccountCheckRule(rule dataprovider.EventRule, params EventParams) (*dataprovider.User,
	*dataprovider.Admin, error,
) {
	for _, action := range rule.Actions {
		if action.Type == dataprovider.ActionTypeIDPAccountCheck {
			startTime := time.Now()
			var user *dataprovider.User
			var admin *dataprovider.Admin
			var err error
			var failedActions []string
			paramsCopy := params.getACopy()

			switch params.Event {
			case IDPLoginAdmin:
				admin, err = executeAdminCheckAction(&action.BaseEventAction.Options.IDPConfig, paramsCopy)
			case IDPLoginUser:
				user, err = executeUserCheckAction(&action.BaseEventAction.Options.IDPConfig, paramsCopy)
			default:
				err = fmt.Errorf("unsupported IDP login event: %q", params.Event)
			}
			if err != nil {
				paramsCopy.AddError(fmt.Errorf("unable to handle %q: %w", params.Event, err))
				eventManagerLog(logger.LevelError, "unable to handle IDP login event %q, err: %v", params.Event, err)
				failedActions = append(failedActions, action.Name)
			} else {
				eventManagerLog(logger.LevelDebug, "executed action %q for rule %q, elapsed %s",
					action.Name, rule.Name, time.Since(startTime))
			}
			// execute async actions if any, including failure actions
			go executeRuleAsyncActions(rule, paramsCopy, failedActions)
			return user, admin, err
		}
	}
	eventManagerLog(logger.LevelError, "no action executed for IDP login event %q, event rule: %q", params.Event, rule.Name)
	return nil, nil, errors.New("no action executed")
}

func executeSyncRulesActions(rules []dataprovider.EventRule, params EventParams) error {
	var errRes error

	for _, rule := range rules {
		var failedActions []string
		paramsCopy := params.getACopy()
		for _, action := range rule.Actions {
			if !action.Options.IsFailureAction && action.Options.ExecuteSync {
				startTime := time.Now()
				if err := executeRuleAction(action.BaseEventAction, paramsCopy, rule.Conditions.Options); err != nil {
					eventManagerLog(logger.LevelError, "unable to execute sync action %q for rule %q, elapsed %s, err: %v",
						action.Name, rule.Name, time.Since(startTime), err)
					failedActions = append(failedActions, action.Name)
					// we return the last error, it is ok for now
					errRes = err
					if action.Options.StopOnFailure {
						break
					}
				} else {
					eventManagerLog(logger.LevelDebug, "executed sync action %q for rule %q, elapsed: %s",
						action.Name, rule.Name, time.Since(startTime))
				}
			}
		}
		// execute async actions if any, including failure actions
		go executeRuleAsyncActions(rule, paramsCopy, failedActions)
	}

	return errRes
}

func executeAsyncRulesActions(rules []dataprovider.EventRule, params EventParams) {
	eventManager.addAsyncTask()
	defer eventManager.removeAsyncTask()

	for _, rule := range rules {
		executeRuleAsyncActions(rule, params.getACopy(), nil)
	}
}

func executeRuleAsyncActions(rule dataprovider.EventRule, params *EventParams, failedActions []string) {
	for _, action := range rule.Actions {
		if !action.Options.IsFailureAction && !action.Options.ExecuteSync {
			startTime := time.Now()
			if err := executeRuleAction(action.BaseEventAction, params, rule.Conditions.Options); err != nil {
				eventManagerLog(logger.LevelError, "unable to execute action %q for rule %q, elapsed %s, err: %v",
					action.Name, rule.Name, time.Since(startTime), err)
				failedActions = append(failedActions, action.Name)
				if action.Options.StopOnFailure {
					break
				}
			} else {
				eventManagerLog(logger.LevelDebug, "executed action %q for rule %q, elapsed %s",
					action.Name, rule.Name, time.Since(startTime))
			}
		}
	}
	if len(failedActions) > 0 {
		params.updateStatusFromError = false
		// execute failure actions
		for _, action := range rule.Actions {
			if action.Options.IsFailureAction {
				startTime := time.Now()
				if err := executeRuleAction(action.BaseEventAction, params, rule.Conditions.Options); err != nil {
					eventManagerLog(logger.LevelError, "unable to execute failure action %q for rule %q, elapsed %s, err: %v",
						action.Name, rule.Name, time.Since(startTime), err)
					if action.Options.StopOnFailure {
						break
					}
				} else {
					eventManagerLog(logger.LevelDebug, "executed failure action %q for rule %q, elapsed: %s",
						action.Name, rule.Name, time.Since(startTime))
				}
			}
		}
	}
}

type eventCronJob struct {
	ruleName string
}

func (j *eventCronJob) getTask(rule *dataprovider.EventRule) (dataprovider.Task, error) {
	if rule.GuardFromConcurrentExecution() {
		task, err := dataprovider.GetTaskByName(rule.Name)
		if err != nil {
			if errors.Is(err, util.ErrNotFound) {
				eventManagerLog(logger.LevelDebug, "adding task for rule %q", rule.Name)
				task = dataprovider.Task{
					Name:     rule.Name,
					UpdateAt: 0,
					Version:  0,
				}
				err = dataprovider.AddTask(rule.Name)
				if err != nil {
					eventManagerLog(logger.LevelWarn, "unable to add task for rule %q: %v", rule.Name, err)
					return task, err
				}
			} else {
				eventManagerLog(logger.LevelWarn, "unable to get task for rule %q: %v", rule.Name, err)
			}
		}
		return task, err
	}

	return dataprovider.Task{}, nil
}

func (j *eventCronJob) Run() {
	eventManagerLog(logger.LevelDebug, "executing scheduled rule %q", j.ruleName)
	rule, err := dataprovider.EventRuleExists(j.ruleName)
	if err != nil {
		eventManagerLog(logger.LevelError, "unable to load rule with name %q", j.ruleName)
		return
	}
	if err := rule.CheckActionsConsistency(""); err != nil {
		eventManagerLog(logger.LevelWarn, "scheduled rule %q skipped: %v", rule.Name, err)
		return
	}
	task, err := j.getTask(&rule)
	if err != nil {
		return
	}
	if task.Name != "" {
		updateInterval := 5 * time.Minute
		updatedAt := util.GetTimeFromMsecSinceEpoch(task.UpdateAt)
		if updatedAt.Add(updateInterval*2 + 1).After(time.Now()) {
			eventManagerLog(logger.LevelDebug, "task for rule %q too recent: %s, skip execution", rule.Name, updatedAt)
			return
		}
		err = dataprovider.UpdateTask(rule.Name, task.Version)
		if err != nil {
			eventManagerLog(logger.LevelInfo, "unable to update task timestamp for rule %q, skip execution, err: %v",
				rule.Name, err)
			return
		}
		ticker := time.NewTicker(updateInterval)
		done := make(chan bool)

		defer func() {
			done <- true
			ticker.Stop()
		}()

		go func(taskName string) {
			eventManagerLog(logger.LevelDebug, "update task %q timestamp worker started", taskName)
			for {
				select {
				case <-done:
					eventManagerLog(logger.LevelDebug, "update task %q timestamp worker finished", taskName)
					return
				case <-ticker.C:
					err := dataprovider.UpdateTaskTimestamp(taskName)
					eventManagerLog(logger.LevelInfo, "updated timestamp for task %q, err: %v", taskName, err)
				}
			}
		}(task.Name)

		executeAsyncRulesActions([]dataprovider.EventRule{rule}, EventParams{Status: 1, updateStatusFromError: true})
	} else {
		executeAsyncRulesActions([]dataprovider.EventRule{rule}, EventParams{Status: 1, updateStatusFromError: true})
	}
	eventManagerLog(logger.LevelDebug, "execution for scheduled rule %q finished", j.ruleName)
}

// RunOnDemandRule executes actions for a rule with on-demand trigger
func RunOnDemandRule(name string) error {
	eventManagerLog(logger.LevelDebug, "executing on demand rule %q", name)
	rule, err := dataprovider.EventRuleExists(name)
	if err != nil {
		eventManagerLog(logger.LevelDebug, "unable to load rule with name %q", name)
		return util.NewRecordNotFoundError(fmt.Sprintf("rule %q does not exist", name))
	}
	if rule.Trigger != dataprovider.EventTriggerOnDemand {
		eventManagerLog(logger.LevelDebug, "cannot run rule %q as on demand, trigger: %d", name, rule.Trigger)
		return util.NewValidationError(fmt.Sprintf("rule %q is not defined as on-demand", name))
	}
	if rule.Status != 1 {
		eventManagerLog(logger.LevelDebug, "on-demand rule %q is inactive", name)
		return util.NewValidationError(fmt.Sprintf("rule %q is inactive", name))
	}
	if err := rule.CheckActionsConsistency(""); err != nil {
		eventManagerLog(logger.LevelError, "on-demand rule %q has incompatible actions: %v", name, err)
		return util.NewValidationError(fmt.Sprintf("rule %q has incosistent actions", name))
	}
	eventManagerLog(logger.LevelDebug, "on-demand rule %q started", name)
	go executeAsyncRulesActions([]dataprovider.EventRule{rule}, EventParams{Status: 1, updateStatusFromError: true})
	return nil
}

type zipWriterWrapper struct {
	Name    string
	Entries map[string]bool
	Writer  *zip.Writer
}

func eventManagerLog(level logger.LogLevel, format string, v ...any) {
	logger.Log(level, "eventmanager", "", format, v...)
}