Unload conversations and old messages every half-hour

FREEBIE

js/conversation_controller.js

@@ -19,6 +19,7 @@
             this.on('add remove change:unreadCount',
                 _.debounce(this.updateUnreadCount.bind(this), 1000)
             );
+            this.startPruning();
         },
         comparator: function(m1, m2) {
             var timestamp1 = m1.get('timestamp');
@@ -65,6 +66,14 @@
             if (newUnreadCount === 0) {
                 window.clearAttention();
             }
+        },
+        startPruning: function() {
+            var halfHour = 30 * 60 * 1000;
+            this.interval = setInterval(function() {
+                this.forEach(function(conversation) {
+                    conversation.trigger('prune');
+                });
+            }.bind(this), halfHour);
         }
     }))();
 

js/models/messages.js

@@ -13,6 +13,7 @@
             this.on('destroy', this.revokeImageUrl);
             this.on('change:expirationStartTimestamp', this.setToExpire);
             this.on('change:expireTimer', this.setToExpire);
+            this.on('unload', this.revokeImageUrl);
             this.setToExpire();
         },
         idForLogging: function() {

js/views/attachment_view.js

@@ -81,6 +81,21 @@
     events: {
         'click': 'onclick'
     },
+    unload: function() {
+        this.blob = null;
+
+        if (this.lightBoxView) {
+            this.lightBoxView.remove();
+        }
+        if (this.fileView) {
+            this.fileView.remove();
+        }
+        if (this.view) {
+            this.view.remove();
+        }
+
+        this.remove();
+    },
     getFileType: function() {
         switch(this.model.contentType) {
             case 'video/quicktime': return 'mov';
@@ -89,10 +104,10 @@
     },
     onclick: function(e) {
         if (this.isImage()) {
-            var view = new Whisper.LightboxView({ model: this });
-            view.render();
-            view.$el.appendTo(this.el);
-            view.$el.trigger('show');
+            this.lightBoxView = new Whisper.LightboxView({ model: this });
+            this.lightBoxView.render();
+            this.lightBoxView.$el.appendTo(this.el);
+            this.lightBoxView.$el.trigger('show');
 
         } else {
             this.saveFile();

js/views/conversation_view.js

@@ -109,6 +109,7 @@
             this.listenTo(this.model, 'delivered', this.updateMessage);
             this.listenTo(this.model, 'opened', this.onOpened);
             this.listenTo(this.model, 'expired', this.onExpired);
+            this.listenTo(this.model, 'prune', this.onPrune);
             this.listenTo(this.model.messageCollection, 'expired', this.onExpiredCollection);
 
             this.lazyUpdateVerified = _.debounce(
@@ -126,7 +127,7 @@
             this.loadingScreen.render();
             this.loadingScreen.$el.prependTo(this.el);
 
-            new TimerMenuView({ el: this.$('.timer-menu'), model: this.model });
+            this.timerMenu = new TimerMenuView({ el: this.$('.timer-menu'), model: this.model });
 
             emoji_util.parse(this.$('.conversation-name'));
 
@@ -151,15 +152,15 @@
 
             this.$messageField = this.$('.send-message');
 
-            var onResize = this.forceUpdateMessageFieldSize.bind(this);
-            this.window.addEventListener('resize', onResize);
+            this.onResize = this.forceUpdateMessageFieldSize.bind(this);
+            this.window.addEventListener('resize', this.onResize);
 
-            var onFocus = function() {
+            this.onFocus = function() {
                 if (this.$el.css('display') !== 'none') {
                     this.markRead();
                 }
             }.bind(this);
-            this.window.addEventListener('focus', onFocus);
+            this.window.addEventListener('focus', this.onFocus);
 
             extension.windows.onClosed(function () {
                 this.window.removeEventListener('resize', onResize);
@@ -207,6 +208,83 @@
             'show-identity': 'showSafetyNumber'
         },
 
+        onPrune: function() {
+            if (!this.model.messageCollection.length || !this.lastActivity) {
+                return;
+            }
+
+            var oneHourAgo = Date.now() - 60 * 60 * 1000;
+            if (this.isHidden() && this.lastActivity < oneHourAgo) {
+                this.unload();
+            } else if (this.view.atBottom()) {
+                this.trim();
+            }
+        },
+
+        unload: function() {
+            console.log('unloading conversation', this.model.id, 'due to inactivity');
+
+            this.timerMenu.remove();
+            this.fileInput.remove();
+            this.titleView.remove();
+
+            if (this.captureAudioView) {
+                this.captureAudioView.remove();
+            }
+            if (this.banner) {
+                this.banner.remove();
+            }
+            if (this.lastSeenIndicator) {
+                this.lastSeenIndicator.remove();
+            }
+            if (this.scrollDownButton) {
+                this.scrollDownButton.remove();
+            }
+            if (this.panels && this.panels.length) {
+                for (var i = 0, max = this.panels.length; i < max; i += 1) {
+                    var panel = this.panels[i];
+                    panel.remove();
+                }
+            }
+
+            this.window.removeEventListener('resize', this.onResize);
+            this.window.removeEventListener('focus', this.onFocus);
+
+            this.view.remove();
+
+            this.remove();
+
+            this.model.messageCollection.forEach(function(model) {
+                model.trigger('unload');
+            });
+            this.model.messageCollection.reset([]);
+            this.model.revokeAvatarUrl();
+        },
+
+        trim: function() {
+            var MAX = 100;
+            var toRemove = this.model.messageCollection.length - MAX;
+            if (toRemove <= 0) {
+                return;
+            }
+
+            var models = [];
+            for (var i = 0; i < toRemove; i += 1) {
+                var model = this.model.messageCollection.at(i);
+                models.push(model);
+            }
+
+            if (!models.length) {
+                return;
+            }
+
+            console.log('trimming conversation', this.model.id, 'of', models.length, 'old messages');
+
+            this.model.messageCollection.remove(models);
+            _.forEach(models, function(model) {
+                model.trigger('unload');
+            });
+        },
 
         markAllAsVerifiedDefault: function(unverified) {
             return Promise.all(unverified.map(function(contact) {
@@ -292,10 +370,18 @@
         },
         captureAudio: function(e) {
             e.preventDefault();
-            var view = new Whisper.RecorderView().render();
+
+            if (this.captureAudioView) {
+                this.captureAudioView.remove();
+                this.captureAudioView = null;
+            }
+
+            var view = this.captureAudioView = new Whisper.RecorderView();
+            view.render();
             view.on('send', this.handleAudioCapture.bind(this));
             view.on('closed', this.endCaptureAudio.bind(this));
             view.$el.appendTo(this.$('.capture-audio'));
+
             this.$('.send-message').attr('disabled','disabled');
             this.$('.microphone').hide();
         },
@@ -308,6 +394,7 @@
         endCaptureAudio: function() {
             this.$('.send-message').removeAttr('disabled');
             this.$('.microphone').show();
+            this.captureAudioView = null;
         },
 
         unfocusBottomBar: function() {
@@ -322,6 +409,7 @@
             //   of messages are added to the DOM, one by one, changing window size and
             //   generating scroll events.
             if (!this.isHidden() && window.isFocused() && !this.inProgressFetch) {
+                this.lastActivity = Date.now();
                 this.markRead();
             }
         },
@@ -340,6 +428,8 @@
         },
 
         onOpened: function() {
+            this.lastActivity = Date.now();
+
             this.statusFetch = this.throttledGetProfiles().then(function() {
                 this.model.updateVerified().then(function() {
                     this.onVerifiedChange();
@@ -664,6 +754,16 @@
             view.render();
         },
 
+        // not currently in use
+        newGroupUpdate: function() {
+            var view = new Whisper.NewGroupUpdateView({
+                model: this.model,
+                window: this.window
+            });
+            view.render();
+            this.listenBack(view);
+        },
+
         listenBack: function(view) {
             this.panels = this.panels || [];
             if (this.panels.length > 0) {
@@ -715,14 +815,6 @@
             this.$('.conversation-menu .menu-list').toggle();
         },
 
-        newGroupUpdate: function() {
-            this.newGroupUpdateView = new Whisper.NewGroupUpdateView({
-                model: this.model,
-                window: this.window
-            });
-            this.listenBack(this.newGroupUpdateView);
-        },
-
         destroyMessages: function(e) {
             this.confirm(i18n('deleteConversationConfirmation')).then(function() {
                 this.model.destroyMessages();

js/views/message_view.js

@@ -43,6 +43,9 @@
     });
     var TimerView = Whisper.View.extend({
         templateName: 'hourglass',
+        initialize: function() {
+            this.listenTo(this.model, 'unload', this.remove);
+        },
         update: function() {
             if (this.timeout) {
               clearTimeout(this.timeout);
@@ -74,6 +77,7 @@
         initialize: function() {
             this.conversation = this.model.getExpirationTimerUpdateSource();
             this.listenTo(this.conversation, 'change', this.render);
+            this.listenTo(this.model, 'unload', this.remove);
         },
         render_attributes: function() {
             var seconds = this.model.get('expirationTimerUpdate').expireTimer;
@@ -100,6 +104,7 @@
         initialize: function() {
             this.conversation = this.model.getModelForKeyChange();
             this.listenTo(this.conversation, 'change', this.render);
+            this.listenTo(this.model, 'unload', this.remove);
         },
         events: {
             'click .content': 'showIdentity'
@@ -124,6 +129,7 @@
         initialize: function() {
             this.conversation = this.model.getModelForVerifiedChange();
             this.listenTo(this.conversation, 'change', this.render);
+            this.listenTo(this.model, 'unload', this.remove);
         },
         events: {
             'click .content': 'showIdentity'
@@ -173,6 +179,7 @@
             this.listenTo(this.model, 'change', this.renderSent);
             this.listenTo(this.model, 'change:flags change:group_update', this.renderControl);
             this.listenTo(this.model, 'destroy', this.onDestroy);
+            this.listenTo(this.model, 'unload', this.onUnload);
             this.listenTo(this.model, 'expired', this.onExpired);
             this.listenTo(this.model, 'pending', this.renderPending);
             this.listenTo(this.model, 'done', this.renderDone);
@@ -209,11 +216,39 @@
             // Failsafe: if in the background, animation events don't fire
             setTimeout(this.remove.bind(this), 1000);
         },
+        onUnload: function() {
+            if (this.avatarView) {
+                this.avatarView.remove();
+            }
+            if (this.errorIconView) {
+                this.errorIconView.remove();
+            }
+            if (this.networkErrorView) {
+                this.networkErrorView.remove();
+            }
+            if (this.someFailedView) {
+                this.someFailedView.remove();
+            }
+            if (this.timeStampView) {
+                this.timeStampView.remove();
+            }
+            if (this.loadedAttachments && this.loadedAttachments.length) {
+                for (var i = 0, max = this.loadedAttachments.length; i < max; i += 1) {
+                    var view = this.loadedAttachments[i];
+                    view.unload();
+                }
+            }
+
+            // No need to handle this one, since it listens to 'unload' itself:
+            //   this.timerView
+
+            this.remove();
+        },
         onDestroy: function() {
             if (this.$el.hasClass('expired')) {
               return;
             }
-            this.remove();
+            this.onUnload();
         },
         select: function(e) {
             this.$el.trigger('select', {message: this.model});
@@ -245,24 +280,41 @@
         },
         renderErrors: function() {
             var errors = this.model.get('errors');
+
             if (_.size(errors) > 0) {
                 if (this.model.isIncoming()) {
                     this.$('.content').text(this.model.getDescription()).addClass('error-message');
                 }
-                var view = new ErrorIconView({ model: errors[0] });
-                view.render().$el.appendTo(this.$('.bubble'));
+                this.errorIconView = new ErrorIconView({ model: errors[0] });
+                this.errorIconView.render().$el.appendTo(this.$('.bubble'));
             } else {
                 this.$('.error-icon-container').remove();
+                if (this.errorIconView) {
+                    this.errorIconView.remove();
+                    this.errorIconView = null;
+                }
             }
-            this.$('.meta .hasRetry').remove();
+
             if (this.model.hasNetworkError()) {
-                var networkErrorView = new NetworkErrorView({model: this.model});
-                this.$('.meta').prepend(networkErrorView.render().el);
+                this.networkErrorView = new NetworkErrorView({model: this.model});
+                this.$('.meta').prepend(this.networkErrorView.render().el);
+            } else {
+                this.$('.meta .hasRetry').remove();
+                if (this.networkErrorView) {
+                    this.networkErrorView.remove();
+                    this.networkErrorView = null;
+                }
             }
-            this.$('.meta .some-failed').remove();
+
             if (this.model.someRecipientsFailed()) {
-                var someFailedView = new SomeFailedView();
-                this.$('.meta').prepend(someFailedView.render().el);
+                this.someFailedView = new SomeFailedView();
+                this.$('.meta').prepend(this.someFailedView.render().el);
+            } else {
+                this.$('.meta .some-failed').remove();
+                if (this.someFailedView) {
+                    this.someFailedView.remove();
+                    this.someFailedView = null;
+                }
             }
         },
         renderControl: function() {
@@ -321,11 +373,11 @@
             if (color) {
                 bubble.addClass(color);
             }
-            var avatarView = new (Whisper.View.extend({
+            this.avatarView = new (Whisper.View.extend({
                 templateName: 'avatar',
                 render_attributes: { avatar: model.getAvatar() }
             }))();
-            this.$('.avatar').replaceWith(avatarView.render().$('.avatar'));
+            this.$('.avatar').replaceWith(this.avatarView.render().$('.avatar'));
         },
         appendAttachmentView: function(view) {
             // We check for a truthy 'updated' here to ensure that a race condition in a