Allow specifying a custom lobsters URL or instance

docs/configuration.md

@@ -573,11 +573,23 @@ Preview:
 #### Properties
 | Name | Type | Required | Default |
 | ---- | ---- | -------- | ------- |
+| instance-url | string | no | https://lobste.rs/ |
+| custom-url | string | no | |
 | limit | integer | no | 15 |
 | collapse-after | integer | no | 5 |
 | sort-by | string | no | hot |
 | tags | array | no | |
 
+##### `instance-url`
+The base URL for a lobsters instance hosted somewhere other than on lobste.rs. Example:
+
+```yaml
+instance-url: https://www.journalduhacker.net/
+```
+
+##### `custom-url`
+A custom URL to retrieve lobsters posts from. If this is specified, the `instance-url`, `sort-by` and `tags` properties are ignored.
+
 ##### `limit`
 The maximum number of posts to show.
 

internal/feed/lobsters.go

@@ -55,20 +55,30 @@ func getLobstersPostsFromFeed(feedUrl string) (ForumPosts, error) {
 	return posts, nil
 }
 
-func FetchLobstersPosts(sortBy string, tags []string) (ForumPosts, error) {
+func FetchLobstersPosts(customURL string, instanceURL string, sortBy string, tags []string) (ForumPosts, error) {
 	var feedUrl string
 
-	if sortBy == "hot" {
-		sortBy = "hottest"
-	} else if sortBy == "new" {
-		sortBy = "newest"
-	}
-
-	if len(tags) == 0 {
-		feedUrl = "https://lobste.rs/" + sortBy + ".json"
+	if customURL != "" {
+		feedUrl = customURL
 	} else {
-		tags := strings.Join(tags, ",")
-		feedUrl = "https://lobste.rs/t/" + tags + ".json"
+		if instanceURL != "" {
+			instanceURL = strings.TrimRight(instanceURL, "/") + "/"
+		} else {
+			instanceURL = "https://lobste.rs/"
+		}
+
+		if sortBy == "hot" {
+			sortBy = "hottest"
+		} else if sortBy == "new" {
+			sortBy = "newest"
+		}
+
+		if len(tags) == 0 {
+			feedUrl = instanceURL + sortBy + ".json"
+		} else {
+			tags := strings.Join(tags, ",")
+			feedUrl = instanceURL + "t/" + tags + ".json"
+		}
 	}
 
 	posts, err := getLobstersPostsFromFeed(feedUrl)

internal/widget/lobsters.go

@@ -12,6 +12,8 @@ import (
 type Lobsters struct {
 	widgetBase     `yaml:",inline"`
 	Posts          feed.ForumPosts `yaml:"-"`
+	InstanceURL    string          `yaml:"instance-url"`
+	CustomURL      string          `yaml:"custom-url"`
 	Limit          int             `yaml:"limit"`
 	CollapseAfter  int             `yaml:"collapse-after"`
 	SortBy         string          `yaml:"sort-by"`
@@ -38,7 +40,7 @@ func (widget *Lobsters) Initialize() error {
 }
 
 func (widget *Lobsters) Update(ctx context.Context) {
-	posts, err := feed.FetchLobstersPosts(widget.SortBy, widget.Tags)
+	posts, err := feed.FetchLobstersPosts(widget.CustomURL, widget.InstanceURL, widget.SortBy, widget.Tags)
 
 	if !widget.canContinueUpdateAfterHandlingErr(err) {
 		return