Save the last retrieved message for public chats on the conversation

js/background.js

@@ -227,7 +227,7 @@
       );
       channel.refreshModStatus();
     });
-  }
+  };
 
   const initAPIs = async () => {
     const ourKey = textsecure.storage.user.getNumber();

js/models/conversations.js

@@ -2079,6 +2079,24 @@
       );
       return channelAPI;
     },
+    getLastRetrievedMessage() {
+      if (!this.isPublic()) {
+        return null;
+      }
+      const lastMessageId = this.get('lastPublicMessage') || 0;
+      return lastMessageId;
+    },
+    async setLastRetrievedMessage(newLastMessageId) {
+      if (!this.isPublic()) {
+        return;
+      }
+      if (this.get('lastPublicMessage') !== newLastMessageId) {
+        this.set({ lastPublicMessage: newLastMessageId });
+        await window.Signal.Data.updateConversation(this.id, this.attributes, {
+          Conversation: Whisper.Conversation,
+        });
+      }
+    },
     isModerator() {
       if (!this.isPublic()) {
         return false;

js/modules/loki_public_chat_api.js

@@ -205,7 +205,7 @@ class LokiPublicChannelAPI {
     this.baseChannelUrl = `channels/${this.channelId}`;
     this.groupName = 'unknown';
     this.conversationId = conversationId;
-    this.lastGot = 0;
+    this.lastGot = null;
     this.stopPolling = false;
     this.modStatus = false;
     this.deleteLastId = 1;
@@ -416,9 +416,14 @@ class LokiPublicChannelAPI {
       count: -20,
       include_deleted: false,
     };
-    if (this.lastGot) {
-      params.since_id = this.lastGot;
+    const conversation = ConversationController.get(this.conversationId);
+    if (!conversation) {
+      log.warn('Trying to poll for non-existing public conversation');
+      this.lastGot = 0;
+    } else if (!this.lastGot) {
+      this.lastGot = conversation.getLastRetrievedMessage();
     }
+    params.since_id = this.lastGot;
     const res = await this.serverRequest(`${this.baseChannelUrl}/messages`, {
       params,
     });
@@ -485,6 +490,7 @@ class LokiPublicChannelAPI {
         this.lastGot = !this.lastGot
           ? adnMessage.id
           : Math.max(this.lastGot, adnMessage.id);
+        conversation.setLastRetrievedMessage(this.lastGot);
       });
     }
 

js/modules/loki_rss_api.js

@@ -49,7 +49,6 @@ class LokiRssAPI extends EventEmitter {
     this.closeable = settings.closeable;
     // non configureable options
     this.feedTimer = null;
-    this.conversationSetup = false;
     // initial set up
     this.getFeed();
   }

js/modules/loki_snode_api.js

@@ -89,6 +89,7 @@ class LokiSnodeAPI {
   async initialiseRandomPool(seedNodes = [...window.seedNodeList]) {
     const params = {
       limit: 20,
+      active_only: true,
       fields: {
         public_ip: true,
         storage_port: true,