From 890a71ec131ecd9e24bb1d55b3df944d718ad7f6 Mon Sep 17 00:00:00 2001
From: benweet <benoit.schweblin@gmail.com>
Date: Sun, 21 Jul 2013 23:18:35 +0100
Subject: [PATCH] Google Drive realtime sync

---
 css/default.css                |   2 +-
 img/icons.png                  | Bin 5551 -> 4768 bytes
 js/classes/AsyncTask.js        |   6 ++++
 js/core.js                     |   6 ++--
 js/helpers/googleHelper.js     |  17 +++++----
 js/providers/gdriveProvider.js |  61 +++++++++++++++++++++------------
 js/synchronizer.js             |   9 ++---
 js/utils.js                    |   1 +
 8 files changed, 64 insertions(+), 38 deletions(-)

diff --git a/css/default.css b/css/default.css
index f648e252..bf47a172 100644
--- a/css/default.css
+++ b/css/default.css
@@ -480,7 +480,7 @@ div.dropdown-menu textarea {
 
 .icon-gdrive.realtime {
 	width: 18px;
-	background-position: -180px 0;
+	background-position: -162px 0;
 }
 
 .icon-dropbox {
diff --git a/img/icons.png b/img/icons.png
index a656096d5a56e99b94ccdaf704ef0076ccb69b73..84b27f79f9c38429b343d25e9cf21fd92ba4cfa5 100644
GIT binary patch
delta 4727
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diff --git a/js/classes/AsyncTask.js b/js/classes/AsyncTask.js
index 56c14e49..bc1d1531 100644
--- a/js/classes/AsyncTask.js
+++ b/js/classes/AsyncTask.js
@@ -127,6 +127,12 @@ define([
 
     // Run the next task in the queue if any and no other running
     function runTask() {
+        
+        // Wait for user first interaction before running first task
+        if(core.isUserReal === false) {
+            return
+        }
+        
         // Use defer to avoid stack overflow
         _.defer(function() {
 
diff --git a/js/core.js b/js/core.js
index d5d2b1b2..567bb60a 100644
--- a/js/core.js
+++ b/js/core.js
@@ -26,12 +26,12 @@ define([
     };
 
     // Used to detect user activity
-    var userReal = false;
+    core.isUserReal = false;
     var userActive = false;
     var windowUnique = true;
     var userLastActivity = 0;
     function setUserActive() {
-        userReal = true;
+        core.isUserReal = true;
         userActive = true;
         userLastActivity = utils.currentTime;
     }
@@ -46,7 +46,7 @@ define([
     // Used to only have 1 window of the application in the same browser
     var windowId = undefined;
     function checkWindowUnique() {
-        if(userReal === false || windowUnique === false) {
+        if(core.isUserReal === false || windowUnique === false) {
             return;
         }
         if(windowId === undefined) {
diff --git a/js/helpers/googleHelper.js b/js/helpers/googleHelper.js
index 4c870941..7febb083 100644
--- a/js/helpers/googleHelper.js
+++ b/js/helpers/googleHelper.js
@@ -85,6 +85,13 @@ define([
             task.chain(localAuthenticate);
         });
     }
+    googleHelper.forceAuthenticate = function() {
+        authenticated = false;
+        var task = new AsyncTask();
+        connect(task);
+        authenticate(task);
+        task.enqueue();
+    };
 
     googleHelper.upload = function(fileId, parentId, title, content, etag, callback) {
         var result = undefined;
@@ -458,7 +465,7 @@ define([
         task.enqueue();
     };
 
-    googleHelper.loadRealtime = function(fileId, content, callback) {
+    googleHelper.loadRealtime = function(fileId, content, callback, errorCallback) {
         var doc = undefined;
         var task = new AsyncTask();
         connect(task);
@@ -473,10 +480,8 @@ define([
                 var string = model.createString(content);
                 model.getRoot().set('content', string);
             }, function(err) {
-                // handleErrors
-                handleError({
-                    code: err.type
-                }, task);
+                errorCallback(err);
+                task.error(new Error(err.message));
             });
         });
         task.onSuccess(function() {
@@ -503,7 +508,7 @@ define([
                     task.retry(new Error(errorMsg));
                     return;
                 }
-                else if(error.code === 401 || error.code === 403) {
+                else if(error.code === 401 || error.code === 403 || error.code == "token_refresh_required") {
                     authenticated = false;
                     errorMsg = "Access to Google account is not authorized.";
                     task.retry(new Error(errorMsg), 1);
diff --git a/js/providers/gdriveProvider.js b/js/providers/gdriveProvider.js
index eb422296..d85f6f80 100644
--- a/js/providers/gdriveProvider.js
+++ b/js/providers/gdriveProvider.js
@@ -89,7 +89,7 @@ define([
             callback(undefined, syncAttributes);
         });
     };
-    
+
     gdriveProvider.exportRealtimeFile = function(event, title, content, callback) {
         var parentId = utils.getInputTextValue("#input-sync-export-gdrive-parentid");
         googleHelper.createRealtimeFile(parentId, title, function(error, result) {
@@ -266,33 +266,38 @@ define([
     extensionMgr.addHookCallback("onEditorConfigure", function(editorParam) {
         editor = editorParam;
     });
-    
+
     // Start realtime synchronization
     var realtimeDocument = undefined;
     var realtimeBinding = undefined;
     var undoExecute = undefined;
     var redoExecute = undefined;
-    gdriveProvider.startRealtimeSync = function(localTitle, localContent, syncAttributes, callback) {
-        logger.log("Starting Google Drive realtime synchronization");
-        googleHelper.loadRealtime(syncAttributes.id, localContent, function(err, doc) {
+    gdriveProvider.startRealtimeSync = function(fileDesc, syncAttributes) {
+        googleHelper.loadRealtime(syncAttributes.id, fileDesc.content, function(err, doc) {
             if(err || !doc) {
-                callback(err);
                 return;
             }
+            
+            // If user just switched to another document
+            if(fileMgr.currentFile !== fileDesc) {
+                doc.close();
+                return;
+            }
+            
+            logger.log("Starting Google Drive realtime synchronization");
             realtimeDocument = doc;
             var model = realtimeDocument.getModel();
             var string = model.getRoot().get('content');
-            
+
             // Saves model content checksum
             function updateContentState() {
                 syncAttributes.contentCRC = utils.crc32(string.getText());
                 utils.storeAttributes(syncAttributes);
             }
-            
+
             var debouncedRefreshPreview = _.debounce(editor.refreshPreview, 100);
             // Called when a modification has been detected
             function contentChangeListener(e) {
-                console.log(e);
                 // If modification comes down from a collaborator
                 if(e.isLocal === false) {
                     logger.log("Google Drive realtime document updated from server");
@@ -304,15 +309,15 @@ define([
             string.addEventListener(gapi.drive.realtime.EventType.TEXT_INSERTED, contentChangeListener);
             string.addEventListener(gapi.drive.realtime.EventType.TEXT_DELETED, contentChangeListener);
             realtimeDocument.addEventListener(gapi.drive.realtime.EventType.DOCUMENT_SAVE_STATE_CHANGED, function(e) {
-                console.log(e);
                 // Save success event
                 if(e.isPending === false && e.isSaving === false) {
                     logger.log("Google Drive realtime document successfully saved on server");
                     updateContentState();
                 }
             });
-            
+
             // Try to merge offline modifications
+            var localContent = fileDesc.content;
             var localContentChanged = syncAttributes.contentCRC != utils.crc32(localContent);
             var remoteContent = string.getText();
             var remoteContentCRC = utils.crc32(remoteContent);
@@ -321,25 +326,25 @@ define([
             if(fileContentChanged === true && localContentChanged === true) {
                 if(remoteContentChanged === true) {
                     // Conflict detected
-                    fileMgr.createFile(localTitle + " (backup)", localContent);
-                    extensionMgr.onMessage('Conflict detected on "' + localTitle + '". A backup has been created locally.');
+                    fileMgr.createFile(fileDesc.title + " (backup)", localContent);
+                    extensionMgr.onMessage('Conflict detected on "' + fileDesc.title + '". A backup has been created locally.');
                 }
                 else {
                     // Add local modifications if no collaborators change
                     string.setText(localContent);
                 }
             }
-            
+
             // Binds model with textarea
             realtimeBinding = gapi.drive.realtime.databinding.bindString(string, $("#wmd-input")[0]);
-            
+
             // Update content state according to collaborators changes
             if(remoteContentChanged === true) {
                 logger.log("Google Drive realtime document updated from server");
                 updateContentState();
                 debouncedRefreshPreview();
             }
-            
+
             // Save undo/redo buttons actions
             undoExecute = editor.uiManager.buttons.undo.execute;
             redoExecute = editor.uiManager.buttons.redo.execute;
@@ -351,18 +356,30 @@ define([
             editor.uiManager.buttons.redo.execute = function() {
                 model.canRedo && model.redo();
             };
-            
+
             // Add event handler for model's UndoRedoStateChanged events
             function setUndoRedoState() {
                 editor.uiManager.setButtonState(editor.uiManager.buttons.undo, model.canUndo);
                 editor.uiManager.setButtonState(editor.uiManager.buttons.redo, model.canRedo);
             }
-            model.addEventListener(
-                gapi.drive.realtime.EventType.UNDO_REDO_STATE_CHANGED,
-                setUndoRedoState);
+            model.addEventListener(gapi.drive.realtime.EventType.UNDO_REDO_STATE_CHANGED, setUndoRedoState);
             setUndoRedoState();
             
-            callback();
+        }, function(err) {
+            console.error(err);
+            if(err.type == "token_refresh_required") {
+                googleHelper.forceAuthenticate();
+            }
+            else if(err.type == "not_found") {
+                extensionMgr.onError('"' + fileDesc.title + '" has been removed from Google Drive.');
+                fileDesc.removeSyncLocation(syncAttributes);
+                extensionMgr.onSyncRemoved(fileDesc, syncAttributes);
+                gdriveProvider.stopRealtimeSync();
+            }
+            else if(err.isFatal) {
+                extensionMgr.onError('An error has forced real time synchronization to stop.');
+                gdriveProvider.stopRealtimeSync();
+            }
         });
     };
 
@@ -377,7 +394,7 @@ define([
             realtimeDocument.close();
             realtimeDocument = undefined;
         }
-        
+
         // Set back original undo/redo actions
         editor.uiManager.buttons.undo.execute = undoExecute;
         editor.uiManager.buttons.redo.execute = redoExecute;
diff --git a/js/synchronizer.js b/js/synchronizer.js
index 64f1fa65..2d14abad 100644
--- a/js/synchronizer.js
+++ b/js/synchronizer.js
@@ -240,10 +240,7 @@ define([
     // 2. we are online
     function tryStartRealtimeSync() {
         if(realtimeFileDesc !== undefined && isOnline === true) {
-            core.lockUI(true);
-            realtimeSyncAttributes.provider.startRealtimeSync(realtimeFileDesc.title, realtimeFileDesc.content, realtimeSyncAttributes, function() {
-                core.lockUI(false);
-            });
+            realtimeSyncAttributes.provider.startRealtimeSync(realtimeFileDesc, realtimeSyncAttributes);
         }
     }
 
@@ -319,7 +316,7 @@ define([
                     });
                 }
                 else {
-                    if(_.size(fileDesc.syncLocations) > 0 && _.first(_.values(obj)).isRealtime) {
+                    if(_.size(fileDesc.syncLocations) > 0 && _.first(_.values(fileDesc.syncLocations)).isRealtime) {
                         extensionMgr.onError("Realtime collaboration document can't be synchronized with multiple locations");
                         return;
                     }
@@ -344,7 +341,7 @@ define([
             // Provider's manual export button
             $(".action-sync-manual-" + provider.providerId).click(function(event) {
                 var fileDesc = fileMgr.currentFile;
-                if(_.size(fileDesc.syncLocations) > 0 && _.first(_.values(obj)).isRealtime) {
+                if(_.size(fileDesc.syncLocations) > 0 && _.first(_.values(fileDesc.syncLocations)).isRealtime) {
                     extensionMgr.onError("Realtime collaboration document can't be synchronized with multiple locations");
                     return;
                 }
diff --git a/js/utils.js b/js/utils.js
index d13b4276..faa854a5 100644
--- a/js/utils.js
+++ b/js/utils.js
@@ -137,6 +137,7 @@ define([
     // Reset input control in all modals
     utils.resetModalInputs = function() {
         $(".modal input[type=text]:not([disabled]), .modal input[type=password], .modal textarea").val("");
+        $(".modal input[type=checkbox]").prop("checked", false);
     };
 
     // Basic trim function