define([ "underscore", "core", "utils", "extension-manager", "file-manager", "google-helper" ], function(_, core, utils, extensionMgr, fileMgr, googleHelper) { var PROVIDER_GDRIVE = "gdrive"; var gdriveProvider = { providerId: PROVIDER_GDRIVE, providerName: "Google Drive", defaultPublishFormat: "template", exportPreferencesInputIds: [ "gdrive-parentid" ] }; function createSyncIndex(id) { return "sync." + PROVIDER_GDRIVE + "." + id; } function createSyncAttributes(id, etag, content, title) { var syncAttributes = {}; syncAttributes.provider = gdriveProvider; syncAttributes.id = id; syncAttributes.etag = etag; syncAttributes.contentCRC = utils.crc32(content); syncAttributes.titleCRC = utils.crc32(title); syncAttributes.syncIndex = createSyncIndex(id); utils.storeAttributes(syncAttributes); return syncAttributes; } function importFilesFromIds(ids) { googleHelper.downloadMetadata(ids, function(error, result) { if(error) { return; } googleHelper.downloadContent(result, function(error, result) { if(error) { return; } var fileDescList = []; _.each(result, function(file) { var syncAttributes = createSyncAttributes(file.id, file.etag, file.content, file.title); var syncLocations = {}; syncLocations[syncAttributes.syncIndex] = syncAttributes; var fileDesc = fileMgr.createFile(file.title, file.content, syncLocations); fileMgr.selectFile(fileDesc); fileDescList.push(fileDesc); }); if(fileDescList.length !== 0) { extensionMgr.onSyncImportSuccess(fileDescList, gdriveProvider); } }); }); } ; gdriveProvider.importFiles = function() { googleHelper.picker(function(error, ids) { if(error || ids.length === 0) { return; } var importIds = []; _.each(ids, function(id) { var syncIndex = createSyncIndex(id); var fileDesc = fileMgr.getFileFromSyncIndex(syncIndex); if(fileDesc !== undefined) { extensionMgr.onError('"' + fileDesc.title + '" was already imported.'); return; } importIds.push(id); }); importFilesFromIds(importIds); }); }; gdriveProvider.exportFile = function(event, title, content, callback) { var parentId = utils.getInputTextValue("#input-sync-export-gdrive-parentid"); googleHelper.upload(undefined, parentId, title, content, undefined, function(error, result) { if(error) { callback(error); return; } var syncAttributes = createSyncAttributes(result.id, result.etag, content, title); callback(undefined, syncAttributes); }); }; gdriveProvider.exportManual = function(event, title, content, callback) { var id = utils.getInputTextValue("#input-sync-manual-gdrive-id", event); if(!id) { return; } // Check that file is not synchronized with another an existing document var syncIndex = createSyncIndex(id); var fileDesc = fileMgr.getFileFromSyncIndex(syncIndex); if(fileDesc !== undefined) { extensionMgr.onError('File ID is already synchronized with "' + fileDesc.title + '".'); callback(true); return; } googleHelper.upload(id, undefined, title, content, undefined, function(error, result) { if(error) { callback(error); return; } var syncAttributes = createSyncAttributes(result.id, result.etag, content, title); callback(undefined, syncAttributes); }); }; gdriveProvider.syncUp = function(uploadContent, uploadContentCRC, uploadTitle, uploadTitleCRC, syncAttributes, callback) { var syncContentCRC = syncAttributes.contentCRC; var syncTitleCRC = syncAttributes.titleCRC; // Skip if CRC has not changed if(uploadContentCRC == syncContentCRC && uploadTitleCRC == syncTitleCRC) { callback(undefined, false); return; } googleHelper.upload(syncAttributes.id, undefined, uploadTitle, uploadContent, syncAttributes.etag, function(error, result) { if(error) { callback(error, true); return; } syncAttributes.etag = result.etag; syncAttributes.contentCRC = uploadContentCRC; syncAttributes.titleCRC = uploadTitleCRC; callback(undefined, true); }); }; gdriveProvider.syncDown = function(callback) { var lastChangeId = parseInt(localStorage[PROVIDER_GDRIVE + ".lastChangeId"]); googleHelper.checkChanges(lastChangeId, function(error, changes, newChangeId) { if(error) { callback(error); return; } var interestingChanges = []; _.each(changes, function(change) { var syncIndex = createSyncIndex(change.fileId); var syncAttributes = fileMgr.getSyncAttributes(syncIndex); if(syncAttributes === undefined) { return; } // Store syncAttributes to avoid 2 times searching change.syncAttributes = syncAttributes; // Delete if(change.deleted === true) { interestingChanges.push(change); return; } // Modify if(syncAttributes.etag != change.file.etag) { interestingChanges.push(change); } }); googleHelper.downloadContent(interestingChanges, function(error, changes) { if(error) { callback(error); return; } _.each(changes, function(change) { var syncAttributes = change.syncAttributes; var syncIndex = syncAttributes.syncIndex; var fileDesc = fileMgr.getFileFromSyncIndex(syncIndex); // No file corresponding (file may have been deleted // locally) if(fileDesc === undefined) { return; } var localTitle = fileDesc.title; // File deleted if(change.deleted === true) { extensionMgr.onError('"' + localTitle + '" has been removed from Google Drive.'); fileMgr.removeSync(syncAttributes); return; } var localTitleChanged = syncAttributes.titleCRC != utils.crc32(localTitle); var localContent = fileDesc.content; var localContentChanged = syncAttributes.contentCRC != utils.crc32(localContent); var file = change.file; var remoteTitleCRC = utils.crc32(file.title); var remoteTitleChanged = syncAttributes.titleCRC != remoteTitleCRC; var fileTitleChanged = localTitle != file.title; var remoteContentCRC = utils.crc32(file.content); var remoteContentChanged = syncAttributes.contentCRC != remoteContentCRC; var fileContentChanged = localContent != file.content; // Conflict detection if((fileTitleChanged === true && localTitleChanged === true && remoteTitleChanged === true) || (fileContentChanged === true && localContentChanged === true && remoteContentChanged === true)) { fileMgr.createFile(localTitle + " (backup)", localContent); extensionMgr.onMessage('Conflict detected on "' + localTitle + '". A backup has been created locally.'); } // If file title changed if(fileTitleChanged && remoteTitleChanged === true) { fileDesc.title = file.title; extensionMgr.onMessage('"' + localTitle + '" has been renamed to "' + file.title + '" on Google Drive.'); } // If file content changed if(fileContentChanged && remoteContentChanged === true) { fileDesc.content = file.content; extensionMgr.onMessage('"' + file.title + '" has been updated from Google Drive.'); if(fileMgr.isCurrentFile(fileDesc)) { fileMgr.selectFile(); // Refresh editor } } // Update syncAttributes syncAttributes.etag = file.etag; syncAttributes.contentCRC = remoteContentCRC; syncAttributes.titleCRC = remoteTitleCRC; utils.storeAttributes(syncAttributes); }); localStorage[PROVIDER_GDRIVE + ".lastChangeId"] = newChangeId; callback(); }); }); }; gdriveProvider.publish = function(publishAttributes, title, content, callback) { googleHelper.upload(publishAttributes.id, undefined, publishAttributes.fileName || title, content, undefined, function(error, result) { if(error) { callback(error); return; } publishAttributes.id = result.id; callback(); }); }; gdriveProvider.newPublishAttributes = function(event) { var publishAttributes = {}; publishAttributes.id = utils.getInputTextValue("#input-publish-gdrive-fileid"); publishAttributes.fileName = utils.getInputTextValue("#input-publish-gdrive-filename"); if(event.isPropagationStopped()) { return undefined; } return publishAttributes; }; core.onReady(function() { var state = localStorage[PROVIDER_GDRIVE + ".state"]; if(state === undefined) { return; } localStorage.removeItem(PROVIDER_GDRIVE + ".state"); state = JSON.parse(state); if(state.action == "create") { googleHelper.upload(undefined, state.folderId, GDRIVE_DEFAULT_FILE_TITLE, "", undefined, function(error, file) { if(error) { return; } var syncAttributes = createSyncAttributes(file.id, file.etag, file.content, file.title); var syncLocations = {}; syncLocations[syncAttributes.syncIndex] = syncAttributes; var fileDesc = fileMgr.createFile(file.title, file.content, syncAttributes); fileMgr.selectFile(fileDesc); extensionMgr.onMessage('"' + file.title + '" created successfully on Google Drive.'); }); } else if(state.action == "open") { var importIds = []; _.each(state.ids, function(id) { var syncIndex = createSyncIndex(id); var fileDesc = fileMgr.getFileFromSyncIndex(syncIndex); if(fileDesc !== undefined) { fileMgr.selectFile(fileDesc); } else { importIds.push(id); } }); importFilesFromIds(importIds); } }); return gdriveProvider; });