Add Synology DiskStation widget

closes #523

public/locales/en/common.json

@@ -118,6 +118,12 @@
         "leech": "Leech",
         "seed": "Seed"
     },
+    "diskstation": {
+        "download": "Download",
+        "upload": "Upload",
+        "leech": "Leech",
+        "seed": "Seed"
+    },
     "sonarr": {
         "wanted": "Wanted",
         "queued": "Queued",

src/widgets/components.js

@@ -8,6 +8,7 @@ const components = {
   changedetectionio: dynamic(() => import("./changedetectionio/component")),
   coinmarketcap: dynamic(() => import("./coinmarketcap/component")),
   deluge: dynamic(() => import("./deluge/component")),
+  diskstation: dynamic(() => import("./diskstation/component")),
   docker: dynamic(() => import("./docker/component")),
   emby: dynamic(() => import("./emby/component")),
   gluetun: dynamic(() => import("./gluetun/component")),

src/widgets/diskstation/component.jsx

@@ -0,0 +1,41 @@
+import { useTranslation } from "next-i18next";
+
+import Container from "components/services/widget/container";
+import Block from "components/services/widget/block";
+import useWidgetAPI from "utils/proxy/use-widget-api";
+
+export default function Component({ service }) {
+  const { t } = useTranslation();
+  const { widget } = service;
+  const { data: listData, error: listError } = useWidgetAPI(widget, "list");
+
+  if (listError) {
+    return <Container error={listError} />;
+  }
+
+  const tasks = listData?.data?.tasks;
+  if (!tasks) {
+    return (
+      <Container service={service}>
+        <Block label="diskstation.leech" />
+        <Block label="diskstation.download" />
+        <Block label="diskstation.seed" />
+        <Block label="diskstation.upload" />
+      </Container>
+    );
+  }
+
+  const rateDl = tasks.reduce((acc, task) => acc + (task?.additional?.transfer?.speed_download ?? 0), 0);
+  const rateUl = tasks.reduce((acc, task) => acc + (task?.additional?.transfer?.speed_upload ?? 0), 0);
+  const completed = tasks.filter((task) => task?.additional?.transfer?.size_downloaded === task?.size)?.length || 0;
+  const leech = tasks.length - completed || 0;
+
+  return (
+    <Container service={service}>
+      <Block label="diskstation.leech" value={t("common.number", { value: leech })} />
+      <Block label="diskstation.download" value={t("common.bitrate", { value: rateDl })} />
+      <Block label="diskstation.seed" value={t("common.number", { value: completed })} />
+      <Block label="diskstation.upload" value={t("common.bitrate", { value: rateUl })} />
+    </Container>
+  );
+}

src/widgets/diskstation/proxy.js

@@ -0,0 +1,70 @@
+import { formatApiCall } from "utils/proxy/api-helpers";
+import { httpProxy } from "utils/proxy/http";
+import createLogger from "utils/logger";
+import widgets from "widgets/widgets";
+import getServiceWidget from "utils/config/service-helpers";
+
+const logger = createLogger("diskstationProxyHandler");
+const authApi = "{url}/webapi/auth.cgi?api=SYNO.API.Auth&version=2&method=login&account={username}&passwd={password}&session=DownloadStation&format=cookie"
+
+async function login(widget) {
+  const loginUrl = formatApiCall(authApi, widget);
+  const [status, contentType, data] = await httpProxy(loginUrl);
+  if (status !== 200) {
+    return [status, contentType, data];
+  }
+
+  const json = JSON.parse(data.toString());
+  if (json?.success !== true) {
+    // from https://global.download.synology.com/download/Document/Software/DeveloperGuide/Package/DownloadStation/All/enu/Synology_Download_Station_Web_API.pdf
+    /*
+      Code Description
+      400  No such account or incorrect password
+      401  Account disabled
+      402  Permission denied
+      403  2-step verification code required
+      404  Failed to authenticate 2-step verification code
+    */
+    let message = "Authentication failed.";
+    if (json?.error?.code >= 403) message += " 2FA enabled.";
+    logger.warn("Unable to login.  Code: %d", json?.error?.code);
+    return [401, "application/json", JSON.stringify({ code: json?.error?.code, message })];
+  }
+
+  return [status, contentType, data];
+}
+
+export default async function diskstationProxyHandler(req, res) {
+  const { group, service, endpoint } = req.query;
+
+  if (!group || !service) {
+    return res.status(400).json({ error: "Invalid proxy service type" });
+  }
+
+  const widget = await getServiceWidget(group, service);
+  const api = widgets?.[widget.type]?.api;
+  if (!api) {
+    return res.status(403).json({ error: "Service does not support API calls" });
+  }
+
+  const url = formatApiCall(api, { endpoint, ...widget });
+  let [status, contentType, data] = await httpProxy(url);
+  if (status !== 200) {
+    logger.debug("Error %d calling endpoint %s", status, url);
+    return res.status(status, data);
+  }
+
+  const json = JSON.parse(data.toString());
+  if (json?.success !== true) {
+    logger.debug("Logging in to DiskStation");
+    [status, contentType, data] = await login(widget);
+    if (status !== 200) {
+      return res.status(status).end(data)
+    }
+
+    [status, contentType, data] = await httpProxy(url);
+  }
+
+  if (contentType) res.setHeader("Content-Type", contentType);
+  return res.status(status).send(data);
+}

src/widgets/diskstation/widget.js

@@ -0,0 +1,14 @@
+import diskstationProxyHandler from "./proxy";
+
+const widget = {
+  api: "{url}/webapi/DownloadStation/task.cgi?api=SYNO.DownloadStation.Task&version=1&method={endpoint}",
+  proxyHandler: diskstationProxyHandler,
+
+  mappings: {
+    "list": {
+      endpoint: "list&additional=transfer",
+    },
+  },
+};
+
+export default widget;

src/widgets/widgets.js

@@ -5,6 +5,7 @@ import bazarr from "./bazarr/widget";
 import changedetectionio from "./changedetectionio/widget";
 import coinmarketcap from "./coinmarketcap/widget";
 import deluge from "./deluge/widget";
+import diskstation from "./diskstation/widget";
 import emby from "./emby/widget";
 import gluetun from "./gluetun/widget";
 import gotify from "./gotify/widget";
@@ -51,6 +52,7 @@ const widgets = {
   changedetectionio,
   coinmarketcap,
   deluge,
+  diskstation,
   emby,
   gluetun,
   gotify,