Receive support for View Once photos

js/view_syncs.js

@@ -0,0 +1,67 @@
+/* global
+  Backbone,
+  Whisper,
+  MessageController
+*/
+
+/* eslint-disable more/no-then */
+
+// eslint-disable-next-line func-names
+(function() {
+  'use strict';
+
+  window.Whisper = window.Whisper || {};
+  Whisper.ViewSyncs = new (Backbone.Collection.extend({
+    forMessage(message) {
+      const sync = this.findWhere({
+        source: message.get('source'),
+        timestamp: message.get('sent_at'),
+      });
+      if (sync) {
+        window.log.info('Found early view sync for message');
+        this.remove(sync);
+        return sync;
+      }
+
+      return null;
+    },
+    async onSync(sync) {
+      try {
+        const messages = await window.Signal.Data.getMessagesBySentAt(
+          sync.get('timestamp'),
+          {
+            MessageCollection: Whisper.MessageCollection,
+          }
+        );
+
+        const found = messages.find(
+          item => item.get('source') === sync.get('source')
+        );
+        const syncSource = sync.get('source');
+        const syncTimestamp = sync.get('timestamp');
+        const wasMessageFound = Boolean(found);
+        window.log.info('Receive view sync:', {
+          syncSource,
+          syncTimestamp,
+          wasMessageFound,
+        });
+
+        if (!found) {
+          return;
+        }
+
+        const message = MessageController.register(found.id, found);
+
+        const viewedAt = sync.get('viewedAt');
+        await message.startTapToViewTimer(viewedAt, { fromSync: true });
+
+        this.remove(sync);
+      } catch (error) {
+        window.log.error(
+          'ViewSyncs.onSync error:',
+          error && error.stack ? error.stack : error
+        );
+      }
+    },
+  }))();
+})();