Merge branch 'follows' into 'develop'

Implement followers/following endpoints and account counters

Closes #69 and #68

See merge request soapbox-pub/ditto!29

src/app.ts

@@ -18,6 +18,8 @@ import {
   accountStatusesController,
   createAccountController,
   followController,
+  followersController,
+  followingController,
   relationshipsController,
   updateCredentialsController,
   verifyCredentialsController,
@@ -105,6 +107,8 @@ app.get('/api/v1/accounts/search', accountSearchController);
 app.get('/api/v1/accounts/lookup', accountLookupController);
 app.get('/api/v1/accounts/relationships', relationshipsController);
 app.post('/api/v1/accounts/:pubkey{[0-9a-f]{64}}/follow', followController);
+app.get('/api/v1/accounts/:pubkey{[0-9a-f]{64}}/followers', followersController);
+app.get('/api/v1/accounts/:pubkey{[0-9a-f]{64}}/following', followingController);
 app.get('/api/v1/accounts/:pubkey{[0-9a-f]{64}}/statuses', accountStatusesController);
 app.get('/api/v1/accounts/:pubkey{[0-9a-f]{64}}', accountController);
 

src/controllers/api/accounts.ts

@@ -1,13 +1,14 @@
 import { type AppController } from '@/app.ts';
 import { type Filter, findReplyTag, z } from '@/deps.ts';
 import * as mixer from '@/mixer.ts';
-import { getAuthor, getFollows, syncUser } from '@/queries.ts';
+import { getAuthor, getFollowedPubkeys, getFollows, syncUser } from '@/queries.ts';
 import { booleanParamSchema } from '@/schema.ts';
 import { jsonMetaContentSchema } from '@/schemas/nostr.ts';
 import { toAccount, toRelationship, toStatus } from '@/transformers/nostr-to-mastoapi.ts';
 import { isFollowing, lookupAccount } from '@/utils.ts';
 import { paginated, paginationSchema, parseBody } from '@/utils/web.ts';
 import { createEvent } from '@/utils/web.ts';
+import { renderEventAccounts } from '@/views.ts';
 
 const createAccountController: AppController = (c) => {
   return c.json({ error: 'Please log in with Nostr.' }, 405);
@@ -173,6 +174,25 @@ const followController: AppController = async (c) => {
   return c.json(relationship);
 };
 
+const followersController: AppController = (c) => {
+  const pubkey = c.req.param('pubkey');
+  const params = paginationSchema.parse(c.req.query());
+  return renderEventAccounts(c, [{ kinds: [3], '#p': [pubkey], ...params }]);
+};
+
+const followingController: AppController = async (c) => {
+  const pubkey = c.req.param('pubkey');
+  const pubkeys = await getFollowedPubkeys(pubkey);
+
+  // TODO: pagination by offset.
+  const accounts = await Promise.all(pubkeys.map(async (pubkey) => {
+    const event = await getAuthor(pubkey);
+    return event ? await toAccount(event) : undefined;
+  }));
+
+  return c.json(accounts.filter(Boolean));
+};
+
 export {
   accountController,
   accountLookupController,
@@ -180,6 +200,8 @@ export {
   accountStatusesController,
   createAccountController,
   followController,
+  followersController,
+  followingController,
   relationshipsController,
   updateCredentialsController,
   verifyCredentialsController,

src/controllers/api/statuses.ts

@@ -1,9 +1,9 @@
 import { type AppController } from '@/app.ts';
 import { type Event, ISO6391, z } from '@/deps.ts';
-import * as mixer from '@/mixer.ts';
-import { getAncestors, getAuthor, getDescendants, getEvent } from '@/queries.ts';
-import { toAccount, toStatus } from '@/transformers/nostr-to-mastoapi.ts';
-import { createEvent, paginated, parseBody } from '@/utils/web.ts';
+import { getAncestors, getDescendants, getEvent } from '@/queries.ts';
+import { toStatus } from '@/transformers/nostr-to-mastoapi.ts';
+import { createEvent, paginationSchema, parseBody } from '@/utils/web.ts';
+import { renderEventAccounts } from '@/views.ts';
 
 const createStatusSchema = z.object({
   in_reply_to_id: z.string().regex(/[0-9a-f]{64}/).nullish(),
@@ -129,34 +129,16 @@ const favouriteController: AppController = async (c) => {
   }
 };
 
-const favouritedByController: AppController = async (c) => {
+const favouritedByController: AppController = (c) => {
   const id = c.req.param('id');
-
-  const events = await mixer.getFilters([{ kinds: [7], '#e': [id] }]);
-
-  const accounts = await Promise.all(events.map(async ({ pubkey }) => {
-    const author = await getAuthor(pubkey);
-    if (author) {
-      return toAccount(author);
-    }
-  }));
-
-  return paginated(c, events, accounts);
+  const params = paginationSchema.parse(c.req.query());
+  return renderEventAccounts(c, [{ kinds: [7], '#e': [id], ...params }]);
 };
 
-const rebloggedByController: AppController = async (c) => {
+const rebloggedByController: AppController = (c) => {
   const id = c.req.param('id');
-
-  const events = await mixer.getFilters([{ kinds: [6], '#e': [id] }]);
-
-  const accounts = await Promise.all(events.map(async ({ pubkey }) => {
-    const author = await getAuthor(pubkey);
-    if (author) {
-      return toAccount(author);
-    }
-  }));
-
-  return paginated(c, events, accounts);
+  const params = paginationSchema.parse(c.req.query());
+  return renderEventAccounts(c, [{ kinds: [6], '#e': [id], ...params }]);
 };
 
 export {

src/queries.ts

@@ -87,4 +87,14 @@ async function syncUser(pubkey: string): Promise<void> {
   ], { timeout: 5000 });
 }
 
-export { getAncestors, getAuthor, getDescendants, getEvent, getFeedPubkeys, getFollows, isLocallyFollowed, syncUser };
+export {
+  getAncestors,
+  getAuthor,
+  getDescendants,
+  getEvent,
+  getFeedPubkeys,
+  getFollowedPubkeys,
+  getFollows,
+  isLocallyFollowed,
+  syncUser,
+};

src/transformers/nostr-to-mastoapi.ts

@@ -5,7 +5,7 @@ import * as eventsDB from '@/db/events.ts';
 import { type Event, findReplyTag, lodash, nip19, sanitizeHtml, TTLCache, unfurl, z } from '@/deps.ts';
 import { verifyNip05Cached } from '@/nip05.ts';
 import { getMediaLinks, type MediaLink, parseNoteContent } from '@/note.ts';
-import { getAuthor, getFollows } from '@/queries.ts';
+import { getAuthor, getFollowedPubkeys, getFollows } from '@/queries.ts';
 import { emojiTagSchema, filteredArray } from '@/schema.ts';
 import { jsonMetaContentSchema } from '@/schemas/nostr.ts';
 import { isFollowing, type Nip05, nostrDate, parseNip05, Time } from '@/utils.ts';
@@ -24,14 +24,12 @@ async function toAccount(event: Event<0>, opts: ToAccountOpts = {}) {
   const { name, nip05, picture, banner, about } = jsonMetaContentSchema.parse(event.content);
   const npub = nip19.npubEncode(pubkey);
 
-  let parsed05: Nip05 | undefined;
-  try {
-    if (nip05 && await verifyNip05Cached(nip05, pubkey)) {
-      parsed05 = parseNip05(nip05);
-    }
-  } catch (_e) {
-    //
-  }
+  const [parsed05, followersCount, followingCount, statusesCount] = await Promise.all([
+    parseAndVerifyNip05(nip05, pubkey),
+    eventsDB.countFilters([{ kinds: [3], '#p': [pubkey] }]),
+    getFollowedPubkeys(pubkey).then((pubkeys) => pubkeys.length),
+    eventsDB.countFilters([{ kinds: [1], authors: [pubkey] }]),
+  ]);
 
   return {
     id: pubkey,
@@ -45,8 +43,8 @@ async function toAccount(event: Event<0>, opts: ToAccountOpts = {}) {
     emojis: toEmojis(event),
     fields: [],
     follow_requests_count: 0,
-    followers_count: 0,
-    following_count: 0,
+    followers_count: followersCount,
+    following_count: followingCount,
     fqn: parsed05?.handle || npub,
     header: banner || DEFAULT_BANNER,
     header_static: banner || DEFAULT_BANNER,
@@ -64,12 +62,18 @@ async function toAccount(event: Event<0>, opts: ToAccountOpts = {}) {
         follow_requests_count: 0,
       }
       : undefined,
-    statuses_count: 0,
+    statuses_count: statusesCount,
     url: Conf.local(`/users/${pubkey}`),
     username: parsed05?.nickname || npub.substring(0, 8),
   };
 }
 
+async function parseAndVerifyNip05(nip05: string | undefined, pubkey: string): Promise<Nip05 | undefined> {
+  if (nip05 && await verifyNip05Cached(nip05, pubkey)) {
+    return parseNip05(nip05);
+  }
+}
+
 async function toMention(pubkey: string) {
   const profile = await getAuthor(pubkey);
   const account = profile ? await toAccount(profile) : undefined;

src/views.ts

@@ -0,0 +1,27 @@
+import { AppContext } from '@/app.ts';
+import { type Filter } from '@/deps.ts';
+import * as mixer from '@/mixer.ts';
+import { getAuthor } from '@/queries.ts';
+import { toAccount } from '@/transformers/nostr-to-mastoapi.ts';
+import { paginated } from '@/utils/web.ts';
+
+/** Render account objects for the author of each event. */
+async function renderEventAccounts(c: AppContext, filters: Filter[]) {
+  const events = await mixer.getFilters(filters);
+  const pubkeys = new Set(events.map(({ pubkey }) => pubkey));
+
+  if (!pubkeys.size) {
+    return c.json([]);
+  }
+
+  const accounts = await Promise.all([...pubkeys].map(async (pubkey) => {
+    const author = await getAuthor(pubkey);
+    if (author) {
+      return toAccount(author);
+    }
+  }));
+
+  return paginated(c, events, accounts);
+}
+
+export { renderEventAccounts };