guilds: add message contexts

- guilds: fix fetch_readable_channels()

litecord/blueprints/guilds.py

@@ -391,7 +391,7 @@ async def fetch_readable_channels(guild_id: int, user_id: int) -> List[int]:
     for channel_id in channel_ids:
         perms = await get_permissions(user_id, channel_id)
 
-        if perms.read_messages:
+        if perms.bits.read_messages:
             res.append(channel_id)
 
     return res
@@ -416,30 +416,39 @@ async def search_messages(guild_id):
     can_read = await fetch_readable_channels(guild_id, user_id)
 
     rows = await app.db.fetch(f"""
-    SELECT messages.id,
-        COUNT(*) OVER() as total_results
-    FROM messages
+    SELECT orig.id AS current_id,
+        COUNT(*) OVER() as total_results,
+        array((SELECT messages.id AS before_id
+         FROM messages WHERE messages.id < orig.id
+         ORDER BY messages.id DESC LIMIT 2)) AS before,
+        array((SELECT messages.id AS after_id
+         FROM messages WHERE messages.id > orig.id
+         ORDER BY messages.id ASC LIMIT 2)) AS after
+
+    FROM messages AS orig
     WHERE guild_id = $1
-      AND messages.content LIKE '%'||$2||'%'
-      AND ARRAY[messages.channel_id] <@ $4::bigint[]
-    ORDER BY messages.id DESC
+      AND orig.content LIKE '%'||$2||'%'
+      AND ARRAY[orig.channel_id] <@ $4::bigint[]
+    ORDER BY orig.id DESC
     LIMIT 50
     OFFSET $3
     """, guild_id, j['content'], j['offset'], can_read)
 
     results = 0 if not rows else rows[0]['total_results']
-    main_messages = [r['id'] for r in rows]
-
-    # fetch contexts for each message
-    # (2 messages before, 2 messages after).
-
-    # TODO: actual contexts
     res = []
 
-    for message_id in main_messages:
-        msg = await app.storage.get_message(message_id)
+    for row in rows:
+        before, after = [], []
+
+        for before_id in reversed(row['before']):
+            before.append(await app.storage.get_message(before_id))
+
+        for after_id in row['after']:
+            after.append(await app.storage.get_message(after_id))
+
+        msg = await app.storage.get_message(row['current_id'])
         msg['hit'] = True
-        res.append([msg])
+        res.append(before + [msg] + after)
 
     return jsonify({
         'total_results': results,