fix: remove servers that no longer exist

Signed-off-by: Infi <infi@infi.sh>

app/src/main/java/chat/revolt/api/realtime/RealtimeSocket.kt

@@ -175,6 +175,21 @@ object RealtimeSocket {
                     )
                 }
 
+                // Remove servers that are not in the ready frame
+                val serversThatExist = readyFrame.servers.mapNotNull { it.id }
+                val serversInDatabase = database.serverQueries.selectAllIds().executeAsList()
+                val serversToDelete = serversInDatabase.filter { it !in serversThatExist }
+
+                serversToDelete.forEach {
+                    database.serverQueries.delete(it)
+                    Log.d(
+                        "RealtimeSocket",
+                        "Deleted server $it from local database due to not being in ready frame."
+                    )
+                    // Conversely, remove the server from the API state
+                    RevoltAPI.serverCache.remove(it)
+                }
+
                 Log.d("RealtimeSocket", "Adding channels to cache.")
                 val channelMap = readyFrame.channels.associateBy { it.id!! }
                 RevoltAPI.channelCache.putAll(channelMap)
@@ -201,6 +216,21 @@ object RealtimeSocket {
                     )
                 }
 
+                // Remove channels that are not in the ready frame
+                val channelsThatExist = readyFrame.channels.mapNotNull { it.id }
+                val channelsInDatabase = database.channelQueries.selectAllIds().executeAsList()
+                val channelsToDelete = channelsInDatabase.filter { it !in channelsThatExist }
+
+                channelsToDelete.forEach {
+                    database.channelQueries.delete(it)
+                    Log.d(
+                        "RealtimeSocket",
+                        "Deleted channel $it from local database due to not being in ready frame."
+                    )
+                    // Conversely, remove the channel from the API state
+                    RevoltAPI.channelCache.remove(it)
+                }
+
                 Log.d("RealtimeSocket", "Adding emojis to cache.")
                 val emojiMap = readyFrame.emojis.associateBy { it.id!! }
                 RevoltAPI.emojiCache.putAll(emojiMap)

app/src/main/sqldelight/chat/revolt/persistence/cache/Channel.sq

@@ -24,6 +24,10 @@ selectAll:
 SELECT *
 FROM Channel;
 
+selectAllIds:
+SELECT id
+FROM Channel;
+
 upsert:
 INSERT OR REPLACE
 INTO Channel (id, channelType, userId, name, owner, description, dmPartner, iconId, lastMessageId, active, nsfw, server)

app/src/main/sqldelight/chat/revolt/persistence/cache/Server.sq

@@ -15,6 +15,10 @@ selectAll:
 SELECT *
 FROM Server;
 
+selectAllIds:
+SELECT id
+FROM Server;
+
 upsert:
 INSERT OR REPLACE
 INTO Server (id, owner, name, description, iconId, bannerId, flags)