feat: bookmark flow — tag→channel, notifyBlogroll, update tracking

- bookmark-import: find/create channel from first tag (no more fallback-only)
- bookmark-import: call notifyBlogroll() after creating feed so blogroll gets
  its entries from microsub, not independently
- bookmark-import: store micropubPostUrl on feed for update/delete tracking
- bookmark-import: move feed when tag changes (delete old, create in new channel)
- feeds: add micropubPostUrl field to createFeed()
- feeds: add getFeedByMicropubPostUrl() for update hook lookup
- feeds: add deleteFeedById() for channel-agnostic removal
- index: pass full tags array (not just first) to importBookmarkAsFollow
- index: capture Location header as postUrl for tracking
- index: handle update action — detect tag change or bookmark-of removal
  and call updateBookmarkFollow() accordingly

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/bookmark-import.js

@@ -2,34 +2,85 @@
  * Bookmark-to-microsub import
  *
  * When a Micropub bookmark-of post is created, automatically follow that URL
- * as a feed in the Microsub reader. Mirrors the blogroll bookmark-import pattern.
+ * as a feed in the Microsub reader.
+ *
+ * Flow: bookmark created → find/create channel from tag → create feed →
+ *       notify blogroll (which gets its entry from microsub, not independently).
+ *
  * @module bookmark-import
  */
 
 import { detectCapabilities } from "./feeds/capabilities.js";
 import { refreshFeedNow } from "./polling/scheduler.js";
-import { getChannels } from "./storage/channels.js";
-import { createFeed, findFeedAcrossChannels } from "./storage/feeds.js";
+import { createChannel, getChannels } from "./storage/channels.js";
+import {
+  createFeed,
+  deleteFeedById,
+  findFeedAcrossChannels,
+  getFeedByMicropubPostUrl,
+  updateFeed,
+} from "./storage/feeds.js";
+import { notifyBlogroll } from "./utils/blogroll-notify.js";
 
 const BOOKMARKS_CHANNEL_NAME = "Bookmarks";
+const SYSTEM_CHANNELS = new Set(["notifications", "activitypub"]);
+
+/**
+ * Resolve (find or create) a Microsub channel by name.
+ * Uses exact case-insensitive match; creates a new channel if none found.
+ *
+ * @param {object} application - Indiekit application context
+ * @param {string} channelName - Desired channel name
+ * @param {string} userId - User ID
+ * @returns {Promise<object>} Full channel document (with _id)
+ */
+async function resolveChannel(application, channelName, userId) {
+  const channelsCollection = application.collections.get("microsub_channels");
+  const nameLower = channelName.toLowerCase();
+
+  // Try to find existing channel (full documents needed for _id)
+  const channels = await channelsCollection
+    .find(userId ? { userId } : {})
+    .sort({ order: 1 })
+    .toArray();
+
+  const existing = channels.find(
+    (ch) => ch.name?.toLowerCase() === nameLower,
+  );
+  if (existing) return existing;
+
+  // Create new channel
+  const created = await createChannel(application, { name: channelName, userId });
+
+  // createChannel returns the document from collection but may not have _id if
+  // it was returned before insertOne; fetch it back to be safe.
+  const fresh = await channelsCollection.findOne(
+    userId ? { uid: created.uid, userId } : { uid: created.uid },
+  );
+  return fresh || created;
+}
 
 /**
  * Follow a bookmarked URL as a Microsub feed subscription.
  *
- * Finds the best matching channel (by category name → "Bookmarks" → first
- * non-special channel) and creates a feed subscription if one does not
- * already exist.
+ * - Uses the FIRST tag as the channel name (creates the channel if needed).
+ * - Falls back to "Bookmarks" channel if no tag is given.
+ * - If the feed already exists in a DIFFERENT channel, move it.
+ * - Notifies the blogroll plugin after creating/moving the feed.
+ * - Stores micropubPostUrl on the feed for future update/delete tracking.
  *
  * @param {object} application - Indiekit application context
  * @param {string|string[]} bookmarkUrl - The bookmarked URL
- * @param {string} [category="bookmarks"] - Micropub category hint for channel selection
+ * @param {string|string[]} [tags=[]] - Micropub category/tags for channel selection
  * @param {string} [userId="default"] - User ID for channel lookup
+ * @param {string} [postUrl] - Permalink of the micropub post (for tracking)
  */
 export async function importBookmarkAsFollow(
   application,
   bookmarkUrl,
-  category = "bookmarks",
+  tags = [],
   userId = "default",
+  postUrl,
 ) {
   const url = Array.isArray(bookmarkUrl) ? bookmarkUrl[0] : bookmarkUrl;
 
@@ -41,37 +92,66 @@ export async function importBookmarkAsFollow(
   }
 
   if (!application.collections?.has("microsub_channels")) {
-    console.warn("[Microsub] bookmark-import: microsub collections not available");
+    console.warn(
+      "[Microsub] bookmark-import: microsub collections not available",
+    );
     return { error: "microsub not initialised" };
   }
 
+  // Normalise tags to an array of trimmed, non-empty strings
+  const tagList = (Array.isArray(tags) ? tags : [tags])
+    .map((t) => String(t).trim())
+    .filter(Boolean);
+
+  // Desired channel: first tag or "Bookmarks" fallback
+  const desiredChannelName =
+    tagList[0] ||
+    BOOKMARKS_CHANNEL_NAME;
+
+  // Resolve (find or create) the target channel
+  const targetChannel = await resolveChannel(
+    application,
+    desiredChannelName,
+    userId,
+  );
+
+  if (!targetChannel) {
+    console.warn("[Microsub] bookmark-import: could not resolve channel");
+    return { error: "could not resolve channel" };
+  }
+
   // Check if already followed in any channel
   const existing = await findFeedAcrossChannels(application, url);
+
   if (existing) {
-    console.log(`[Microsub] bookmark-import: ${url} already followed`);
-    return { alreadyExists: true, url };
+    const existingFeed = existing.feed;
+    const existingChannelName = existing.channelName;
+
+    // If in the correct channel already, nothing to do
+    if (
+      existingFeed.channelId.toString() === targetChannel._id.toString()
+    ) {
+      // Update micropubPostUrl if we now know it and it wasn't set
+      if (postUrl && !existingFeed.micropubPostUrl) {
+        await updateFeed(application, existingFeed._id, {
+          micropubPostUrl: postUrl,
+        });
+      }
+      console.log(
+        `[Microsub] bookmark-import: ${url} already followed in "${existingChannelName}" (correct channel)`,
+      );
+      return { alreadyExists: true, url, channel: existingChannelName };
+    }
+
+    // Wrong channel — move the feed: delete from old channel, create in new one.
+    console.log(
+      `[Microsub] bookmark-import: moving ${url} from "${existingChannelName}" → "${targetChannel.name}"`,
+    );
+    await deleteFeedById(application, existingFeed._id);
+    // Fall through to create below
   }
 
-  // Find a suitable channel — category match > "Bookmarks" > first non-special
-  const channels = await getChannels(application, userId);
-  const categoryLower = (category || "").toLowerCase();
-
-  const targetChannel =
-    channels.find((ch) => ch.name?.toLowerCase() === categoryLower) ||
-    channels.find(
-      (ch) => ch.name?.toLowerCase() === BOOKMARKS_CHANNEL_NAME.toLowerCase(),
-    ) ||
-    channels.find(
-      (ch) => ch.name !== "Notifications" && ch.name !== "ActivityPub",
-    ) ||
-    channels[0];
-
-  if (!targetChannel) {
-    console.warn("[Microsub] bookmark-import: no channels available");
-    return { error: "no channels available" };
-  }
-
-  // Create feed subscription
+  // Create feed subscription in the target channel
   let feed;
   try {
     feed = await createFeed(application, {
@@ -79,10 +159,13 @@ export async function importBookmarkAsFollow(
       url,
       title: undefined,
       photo: undefined,
+      micropubPostUrl: postUrl || undefined,
     });
   } catch (error) {
     if (error.code === "DUPLICATE_FEED") {
-      console.log(`[Microsub] bookmark-import: feed already exists for ${url}`);
+      console.log(
+        `[Microsub] bookmark-import: duplicate feed detected for ${url}`,
+      );
       return { alreadyExists: true, url };
     }
     throw error;
@@ -95,19 +178,136 @@ export async function importBookmarkAsFollow(
       error.message,
     );
   });
-  detectCapabilities(url)
-    .then((_capabilities) => {
-      // capabilities are stored by refreshFeedNow/processor; nothing needed here
-    })
-    .catch((error) => {
-      console.error(
-        `[Microsub] bookmark-import: capability detection error for ${url}:`,
-        error.message,
-      );
-    });
+  detectCapabilities(url).catch((error) => {
+    console.error(
+      `[Microsub] bookmark-import: capability detection error for ${url}:`,
+      error.message,
+    );
+  });
+
+  // Notify blogroll (it gets its entries from microsub, not independently)
+  notifyBlogroll(application, "follow", {
+    url,
+    title: feed.title,
+    channelName: targetChannel.name,
+    feedId: feed._id.toString(),
+    channelId: targetChannel._id.toString(),
+  }).catch((error) => {
+    console.error(`[Microsub] bookmark-import: blogroll notify error:`, error.message);
+  });
 
   console.log(
     `[Microsub] bookmark-import: added ${url} to channel "${targetChannel.name}"`,
   );
   return { added: 1, url, channel: targetChannel.name };
 }
+
+/**
+ * Handle a bookmark post UPDATE.
+ *
+ * Called when a micropub update action is detected and the post previously
+ * created a feed subscription. Handles:
+ *   - Tag change → move feed to new channel, update blogroll category
+ *   - bookmark-of removed → unfollow from microsub and remove from blogroll
+ *
+ * @param {object} application - Indiekit application context
+ * @param {string} postUrl - Permalink of the micropub post being updated
+ * @param {object} changes - Detected changes from the micropub update body
+ * @param {string[]} [changes.newTags] - New category/tag values (if changed)
+ * @param {boolean} [changes.bookmarkRemoved] - True if bookmark-of was deleted
+ * @param {string} [changes.newBookmarkUrl] - New bookmark-of URL (if changed)
+ * @param {string} [userId="default"] - User ID
+ */
+export async function updateBookmarkFollow(
+  application,
+  postUrl,
+  changes,
+  userId = "default",
+) {
+  if (!application.collections?.has("microsub_channels")) return;
+
+  // Find the feed that was created from this post
+  const existing = await getFeedByMicropubPostUrl(application, postUrl);
+  if (!existing) {
+    console.log(
+      `[Microsub] bookmark-update: no feed found for post ${postUrl}`,
+    );
+    return;
+  }
+
+  const { feed, channel } = existing;
+
+  // Case 1: bookmark-of removed or post type changed → unfollow
+  if (changes.bookmarkRemoved) {
+    console.log(
+      `[Microsub] bookmark-update: bookmark-of removed for ${postUrl}, unfollowing ${feed.url}`,
+    );
+    await deleteFeedById(application, feed._id);
+    notifyBlogroll(application, "unfollow", { url: feed.url }).catch(
+      (error) => {
+        console.error(
+          `[Microsub] bookmark-update: blogroll notify error:`,
+          error.message,
+        );
+      },
+    );
+    return;
+  }
+
+  // Case 2: tag/category changed → move feed to new channel
+  if (changes.newTags && changes.newTags.length > 0) {
+    const desiredChannelName = changes.newTags[0];
+
+    // Already in the right channel?
+    if (channel?.name?.toLowerCase() === desiredChannelName.toLowerCase()) {
+      console.log(
+        `[Microsub] bookmark-update: channel unchanged for ${feed.url}`,
+      );
+      return;
+    }
+
+    const newChannel = await resolveChannel(
+      application,
+      desiredChannelName,
+      userId,
+    );
+
+    // Move: delete from old, create in new
+    console.log(
+      `[Microsub] bookmark-update: moving ${feed.url} → channel "${newChannel.name}"`,
+    );
+    await deleteFeedById(application, feed._id);
+
+    let newFeed;
+    try {
+      newFeed = await createFeed(application, {
+        channelId: newChannel._id,
+        url: feed.url,
+        title: feed.title,
+        photo: feed.photo,
+        micropubPostUrl: postUrl,
+      });
+    } catch (error) {
+      if (error.code !== "DUPLICATE_FEED") throw error;
+      // If it ended up there already, that's fine
+      return;
+    }
+
+    // Refresh the feed in its new home
+    refreshFeedNow(application, newFeed._id).catch(() => {});
+
+    // Update blogroll category
+    notifyBlogroll(application, "follow", {
+      url: newFeed.url,
+      title: newFeed.title,
+      channelName: newChannel.name,
+      feedId: newFeed._id.toString(),
+      channelId: newChannel._id.toString(),
+    }).catch((error) => {
+      console.error(
+        `[Microsub] bookmark-update: blogroll notify error:`,
+        error.message,
+      );
+    });
+  }
+}

lib/storage/feeds.js

@@ -91,11 +91,12 @@ export async function findFeedAcrossChannels(application, url) {
  * @param {string} data.url - Feed URL
  * @param {string} [data.title] - Feed title
  * @param {string} [data.photo] - Feed icon URL
+ * @param {string} [data.micropubPostUrl] - Micropub post URL that created this feed (for update tracking)
  * @returns {Promise<object>} Created feed
  */
 export async function createFeed(
   application,
-  { channelId, url, title, photo },
+  { channelId, url, title, photo, micropubPostUrl },
 ) {
   const collection = getCollection(application);
 
@@ -122,6 +123,7 @@ export async function createFeed(
     url,
     title: title || undefined,
     photo: photo || undefined,
+    micropubPostUrl: micropubPostUrl || undefined,
     tier: 1, // Start at tier 1 (2 minutes)
     unmodified: 0,
     nextFetchAt: new Date(), // Fetch immediately (kept as Date for query compatibility)
@@ -177,6 +179,47 @@ export async function getFeedById(application, id) {
   return collection.findOne({ _id: objectId });
 }
 
+/**
+ * Get a feed by the micropub post URL that created it.
+ * Used for update/delete tracking when a bookmark post changes.
+ * @param {object} application - Indiekit application
+ * @param {string} postUrl - The micropub post permalink
+ * @returns {Promise<{feed: object, channel: object}|null>} Feed + channel, or null
+ */
+export async function getFeedByMicropubPostUrl(application, postUrl) {
+  const collection = getCollection(application);
+  const feed = await collection.findOne({ micropubPostUrl: postUrl });
+  if (!feed) return null;
+
+  const channelsCollection = application.collections.get("microsub_channels");
+  const channel = await channelsCollection.findOne({ _id: feed.channelId });
+
+  return { feed, channel };
+}
+
+/**
+ * Delete a feed by its ObjectId (regardless of channel).
+ * Used when removing a feed without knowing the channel.
+ * @param {object} application - Indiekit application
+ * @param {ObjectId|string} feedId - Feed ObjectId
+ * @returns {Promise<boolean>} True if deleted
+ */
+export async function deleteFeedById(application, feedId) {
+  const collection = getCollection(application);
+  const objectId = typeof feedId === "string" ? new ObjectId(feedId) : feedId;
+
+  const feed = await collection.findOne({ _id: objectId });
+  if (!feed) return false;
+
+  const itemsDeleted = await deleteItemsForFeed(application, feed._id);
+  console.info(
+    `[Microsub] Deleted ${itemsDeleted} items from feed ${feed.url}`,
+  );
+
+  const result = await collection.deleteOne({ _id: objectId });
+  return result.deletedCount > 0;
+}
+
 /**
  * Update a feed
  * @param {object} application - Indiekit application