Restore locally deleted collections and searches that changed remotely

Also restore items that were in the collections

chrome/content/zotero/xpcom/sync/syncEngine.js

@@ -463,7 +463,7 @@ Zotero.Sync.Data.Engine.prototype._downloadUpdatedObjects = Zotero.Promise.corou
  *
  * @return {Promise<Integer>} - A download result code (this.DOWNLOAD_RESULT_*)
  */
-Zotero.Sync.Data.Engine.prototype._downloadObjects = Zotero.Promise.coroutine(function* (objectType, keys) {
+Zotero.Sync.Data.Engine.prototype._downloadObjects = async function (objectType, keys) {
 	var objectTypePlural = Zotero.DataObjectUtilities.getObjectTypePlural(objectType);
 	
 	var remainingKeys = [...keys];
@@ -506,12 +506,13 @@ Zotero.Sync.Data.Engine.prototype._downloadObjects = Zotero.Promise.coroutine(fu
 		);
 		
 		var conflicts = [];
+		var restored = [];
 		var num = 0;
 		
 		// Process batches of object data as they're available, one at a time
-		yield Zotero.Promise.map(
+		await Zotero.Promise.map(
 			json,
-			Zotero.Promise.coroutine(function* (batch) {
+			async function (batch) {
 				this._failedCheck();
 				
 				Zotero.debug(`Processing batch of downloaded ${objectTypePlural} in ${this.library.name}`);
@@ -527,7 +528,7 @@ Zotero.Sync.Data.Engine.prototype._downloadObjects = Zotero.Promise.coroutine(fu
 				});
 				
 				// Process objects
-				let results = yield Zotero.Sync.Data.Local.processObjectsFromJSON(
+				let results = await Zotero.Sync.Data.Local.processObjectsFromJSON(
 					objectType,
 					this.libraryID,
 					batch,
@@ -563,6 +564,11 @@ Zotero.Sync.Data.Engine.prototype._downloadObjects = Zotero.Promise.coroutine(fu
 					// If data was processed, remove JSON
 					if (x.processed) {
 						delete objectData[x.key];
+						
+						// We'll need to add items back to restored collections
+						if (x.restored) {
+							restored.push(x.key);
+						}
 					}
 					// If object shouldn't be retried, mark as processed
 					if (x.processed || !x.retry) {
@@ -574,12 +580,18 @@ Zotero.Sync.Data.Engine.prototype._downloadObjects = Zotero.Promise.coroutine(fu
 				});
 				remainingKeys = Zotero.Utilities.arrayDiff(remainingKeys, processedKeys);
 				conflicts.push(...conflictResults);
-			}.bind(this)),
+			}.bind(this),
 			{
 				concurrency: 1
 			}
 		);
 		
+		// If any locally deleted collections were restored, either add them back to the collection
+		// (if the items still exist) or remove them from the delete log and add them to the sync queue
+		if (restored.length && objectType == 'collection') {
+			await this._restoreRestoredCollectionItems(restored);
+		}
+		
 		this._failedCheck();
 		
 		// If all requests were successful, such that we had a chance to see all keys, remove keys we
@@ -590,7 +602,7 @@ Zotero.Sync.Data.Engine.prototype._downloadObjects = Zotero.Promise.coroutine(fu
 				Zotero.debug(`Removing ${missingKeys.length} missing `
 					+ Zotero.Utilities.pluralize(missingKeys.length, [objectType, objectTypePlural])
 					+ " from sync queue");
-				yield Zotero.Sync.Data.Local.removeObjectsFromSyncQueue(objectType, this.libraryID, missingKeys);
+				await Zotero.Sync.Data.Local.removeObjectsFromSyncQueue(objectType, this.libraryID, missingKeys);
 				remainingKeys = Zotero.Utilities.arrayDiff(remainingKeys, missingKeys);
 			}
 		}
@@ -602,7 +614,7 @@ Zotero.Sync.Data.Engine.prototype._downloadObjects = Zotero.Promise.coroutine(fu
 				Zotero.debug(`Queueing ${failedKeys.length} failed `
 					+ Zotero.Utilities.pluralize(failedKeys.length, [objectType, objectTypePlural])
 					+ " for later", 2);
-				yield Zotero.Sync.Data.Local.addObjectsToSyncQueue(
+				await Zotero.Sync.Data.Local.addObjectsToSyncQueue(
 					objectType, this.libraryID, failedKeys
 				);
 				
@@ -629,7 +641,7 @@ Zotero.Sync.Data.Engine.prototype._downloadObjects = Zotero.Promise.coroutine(fu
 	
 	// Show conflict resolution window
 	if (conflicts.length) {
-		let results = yield Zotero.Sync.Data.Local.processConflicts(
+		let results = await Zotero.Sync.Data.Local.processConflicts(
 			objectType, this.libraryID, conflicts, this._getOptions()
 		);
 		// Keys can be unprocessed if conflict resolution is cancelled
@@ -637,11 +649,77 @@ Zotero.Sync.Data.Engine.prototype._downloadObjects = Zotero.Promise.coroutine(fu
 		if (!keys.length) {
 			throw new Zotero.Sync.UserCancelledException();
 		}
-		yield Zotero.Sync.Data.Local.removeObjectsFromSyncQueue(objectType, this.libraryID, keys);
+		await Zotero.Sync.Data.Local.removeObjectsFromSyncQueue(objectType, this.libraryID, keys);
 	}
 	
 	return this.DOWNLOAD_RESULT_CONTINUE;
-});
+};
+
+
+/**
+ * If a collection is deleted locally but modified remotely between syncs, the local collection is
+ * restored, but collection membership is a property of items, the local items that were previously
+ * in that collection won't be any longer (or they might have been deleted along with the collection),
+ * so we have to get the current collection items from the API and either add them back
+ * (if they exist) or clear them from the delete log and mark them for download.
+ *
+ * Remote items in the trash aren't currently restored and will be removed from the collection when the
+ * local collection-item removal syncs up.
+ */
+Zotero.Sync.Data.Engine.prototype._restoreRestoredCollectionItems = async function (collectionKeys) {
+	for (let collectionKey of collectionKeys) {
+		let { keys: itemKeys } = await this.apiClient.getKeys(
+			this.library.libraryType,
+			this.libraryTypeID,
+			{
+				target: `collections/${collectionKey}/items/top`,
+				format: 'keys'
+			}
+		);
+		
+		if (itemKeys.length) {
+			let collection = Zotero.Collections.getByLibraryAndKey(this.libraryID, collectionKey);
+			let addToCollection = [];
+			let addToQueue = [];
+			for (let itemKey of itemKeys) {
+				let o = Zotero.Items.getByLibraryAndKey(this.libraryID, itemKey);
+				if (o) {
+					addToCollection.push(o.id);
+					// Remove item from trash if it's there, since it's not in the trash remotely.
+					// (This would happen if items were moved to the trash along with the collection
+					// deletion.)
+					if (o.deleted) {
+						o.deleted = false
+						await o.saveTx();
+					}
+				}
+				else {
+					addToQueue.push(itemKey);
+				}
+			}
+			if (addToCollection.length) {
+				Zotero.debug(`Restoring ${addToCollection.length} `
+					+ `${Zotero.Utilities.pluralize(addToCollection.length, ['item', 'items'])} `
+					+ `to restored collection ${collection.libraryKey}`);
+				await Zotero.DB.executeTransaction(function* () {
+					yield collection.addItems(addToCollection);
+				}.bind(this));
+			}
+			if (addToQueue.length) {
+				Zotero.debug(`Restoring ${addToQueue.length} deleted `
+					+ `${Zotero.Utilities.pluralize(addToQueue.length, ['item', 'items'])} `
+					+ `in restored collection ${collection.libraryKey}`);
+				await Zotero.Sync.Data.Local.removeObjectsFromDeleteLog(
+					'item', this.libraryID, addToQueue
+				);
+				await Zotero.Sync.Data.Local.addObjectsToSyncQueue(
+					'item', this.libraryID, addToQueue
+				);
+			}
+		}
+	}
+};
+
 
 
 /**

chrome/content/zotero/xpcom/sync/syncLocal.js

@@ -665,6 +665,7 @@ Zotero.Sync.Data.Local = {
 	 *         {Boolean} processed
 	 *         {Object} [error]
 	 *         {Boolean} [retry]
+	 *         {Boolean} [restored=false] - Locally deleted object was added back
 	 *         {Boolean} [conflict=false]
 	 *         {Object} [left] - Local JSON data for conflict (or .deleted and .dateDeleted)
 	 *         {Object} [right] - Remote JSON data for conflict
@@ -783,6 +784,7 @@ Zotero.Sync.Data.Local = {
 						let obj = yield objectsClass.getByLibraryAndKeyAsync(
 							libraryID, objectKey, { noCache: true }
 						);
+						let restored = false;
 						if (obj) {
 							Zotero.debug("Matching local " + objectType + " exists", 4);
 							
@@ -921,13 +923,14 @@ Zotero.Sync.Data.Local = {
 								// Auto-restore some locally deleted objects that have changed remotely
 								case 'collection':
 								case 'search':
+									Zotero.debug(`${ObjectType} ${objectKey} was modified remotely `
+										+ '-- restoring');
 									yield this.removeObjectsFromDeleteLog(
 										objectType,
 										libraryID,
 										[objectKey]
 									);
-									
-									throw new Error("Unimplemented");
+									restored = true;
 									break;
 								
 								default:
@@ -946,6 +949,9 @@ Zotero.Sync.Data.Local = {
 						}
 						
 						let saveResults = yield this._saveObjectFromJSON(obj, jsonObject, saveOptions);
+						if (restored) {
+							saveResults.restored = true;
+						}
 						results.push(saveResults);
 						if (!saveResults.processed) {
 							throw saveResults.error;

test/content/support.js

@@ -393,7 +393,7 @@ function createUnsavedDataObject(objectType, params = {}) {
 	var itemType;
 	if (objectType == 'item' || objectType == 'feedItem') {
 		itemType = params.itemType || 'book';
-		allowedParams.push('dateAdded', 'dateModified');
+		allowedParams.push('deleted', 'dateAdded', 'dateModified');
 	}
 	if (objectType == 'item') {
 		allowedParams.push('inPublications');

test/tests/syncEngineTest.js

@@ -2188,6 +2188,99 @@ describe("Zotero.Sync.Data.Engine", function () {
 			var keys = yield Zotero.Sync.Data.Local.getObjectsFromSyncQueue(objectType, libraryID);
 			assert.sameMembers(keys, ['BBBBBBBB']);
 		});
+		
+		
+		it("should add items that exist remotely in a locally deleted, remotely modified collection back to collection", async function () {
+			({ engine, client, caller } = await setup({
+				stopOnError: false
+			}));
+			var libraryID = Zotero.Libraries.userLibraryID;
+			
+			var collection = await createDataObject('collection');
+			var collectionKey = collection.key;
+			await collection.eraseTx();
+			var item1 = await createDataObject('item');
+			var item2 = await createDataObject('item', { deleted: true });
+			
+			var headers = {
+				"Last-Modified-Version": 5
+			};
+			setResponse({
+				method: "GET",
+				url: `users/1/collections?format=json&collectionKey=${collectionKey}`,
+				status: 200,
+				headers,
+				json: [
+					makeCollectionJSON({
+						key: collectionKey,
+						version: 5,
+						name: "A"
+					})
+				]
+			});
+			setResponse({
+				method: "GET",
+				url: `users/1/collections/${collectionKey}/items/top?format=keys`,
+				status: 200,
+				headers,
+				text: item1.key + "\n" + item2.key + "\n"
+			});
+			await engine._downloadObjects('collection', [collectionKey]);
+			
+			var collection = Zotero.Collections.getByLibraryAndKey(libraryID, collectionKey);
+			assert.sameMembers(collection.getChildItems(true), [item1.id, item2.id]);
+			// Item should be removed from trash
+			assert.isFalse(item2.deleted);
+		});
+		
+		
+		it("should add locally deleted items that exist remotely in a locally deleted, remotely modified collection to sync queue and remove from delete log", async function () {
+			({ engine, client, caller } = await setup({
+				stopOnError: false
+			}));
+			var libraryID = Zotero.Libraries.userLibraryID;
+			
+			var collection = await createDataObject('collection');
+			var collectionKey = collection.key;
+			await collection.eraseTx();
+			var item = await createDataObject('item');
+			await item.eraseTx();
+			
+			var headers = {
+				"Last-Modified-Version": 5
+			};
+			setResponse({
+				method: "GET",
+				url: `users/1/collections?format=json&collectionKey=${collectionKey}`,
+				status: 200,
+				headers,
+				json: [
+					makeCollectionJSON({
+						key: collectionKey,
+						version: 5,
+						name: "A"
+					})
+				]
+			});
+			setResponse({
+				method: "GET",
+				url: `users/1/collections/${collectionKey}/items/top?format=keys`,
+				status: 200,
+				headers,
+				text: item.key + "\n"
+			});
+			await engine._downloadObjects('collection', [collectionKey]);
+			
+			var collection = Zotero.Collections.getByLibraryAndKey(libraryID, collectionKey);
+			
+			assert.sameMembers(
+				await Zotero.Sync.Data.Local.getObjectsFromSyncQueue('item', libraryID),
+				[item.key]
+			);
+			assert.isFalse(
+				await Zotero.Sync.Data.Local.getDateDeleted('item', libraryID, item.key)
+			);
+		});
 	});
 	
 	

test/tests/syncLocalTest.js

@@ -494,6 +494,38 @@ describe("Zotero.Sync.Data.Local", function() {
 			assert.isFalse(obj.synced);
 		});
 		
+		it("should restore locally deleted collections and searches that changed remotely", async function () {
+			var libraryID = Zotero.Libraries.userLibraryID;
+			
+			for (let type of ['collection', 'search']) {
+				let objectsClass = Zotero.DataObjectUtilities.getObjectsClassForObjectType(type);
+				let obj = await createDataObject(type, { version: 1 });
+				let data = obj.toJSON();
+				
+				await obj.eraseTx();
+				
+				data.key = obj.key;
+				data.version = 2;
+				let json = {
+					key: obj.key,
+					version: 2,
+					data
+				};
+				let results = await Zotero.Sync.Data.Local.processObjectsFromJSON(
+					type, libraryID, [json], { stopOnError: true }
+				);
+				assert.isTrue(results[0].processed);
+				assert.notOk(results[0].conflict);
+				assert.isTrue(results[0].restored);
+				assert.isUndefined(results[0].changes);
+				assert.isUndefined(results[0].conflicts);
+				obj = objectsClass.getByLibraryAndKey(libraryID, data.key);
+				assert.equal(obj.version, 2);
+				assert.isTrue(obj.synced);
+				assert.isFalse(await Zotero.Sync.Data.Local.getDateDeleted(type, libraryID, data.key));
+			}
+		});
+		
 		it("should delete older versions in sync cache after processing", function* () {
 			var libraryID = Zotero.Libraries.userLibraryID;