michael@0: const {Cc,Ci,Cu} = require("chrome");
michael@0: const ObservableObject = require("devtools/shared/observable-object");
michael@0: const promise = require("devtools/toolkit/deprecated-sync-thenables");
michael@0: 
michael@0: const {EventEmitter} = Cu.import("resource://gre/modules/devtools/event-emitter.js");
michael@0: const {generateUUID} = Cc['@mozilla.org/uuid-generator;1'].getService(Ci.nsIUUIDGenerator);
michael@0: 
michael@0: /**
michael@0:  * IndexedDB wrapper that just save project objects
michael@0:  *
michael@0:  * The only constraint is that project objects have to have
michael@0:  * a unique `location` object.
michael@0:  */
michael@0: 
michael@0: const global = this;
michael@0: const IDB = {
michael@0:   _db: null,
michael@0: 
michael@0:   open: function () {
michael@0:     let deferred = promise.defer();
michael@0: 
michael@0:     var idbManager = Cc["@mozilla.org/dom/indexeddb/manager;1"]
michael@0:                        .getService(Ci.nsIIndexedDatabaseManager);
michael@0:     idbManager.initWindowless(global);
michael@0: 
michael@0:     let request = global.indexedDB.open("AppProjects", 5);
michael@0:     request.onerror = function(event) {
michael@0:       deferred.reject("Unable to open AppProjects indexedDB. " +
michael@0:                       "Error code: " + event.target.errorCode);
michael@0:     };
michael@0:     request.onupgradeneeded = function(event) {
michael@0:       let db = event.target.result;
michael@0:       db.createObjectStore("projects", { keyPath: "location" });
michael@0:     };
michael@0: 
michael@0:     request.onsuccess = function() {
michael@0:       let db = IDB._db = request.result;
michael@0:       let objectStore = db.transaction("projects").objectStore("projects");
michael@0:       let projects = []
michael@0:       objectStore.openCursor().onsuccess = function(event) {
michael@0:         let cursor = event.target.result;
michael@0:         if (cursor) {
michael@0:           if (cursor.value.location) {
michael@0:             // We need to make sure this object has a `.location` property.
michael@0:             // The UI depends on this property.
michael@0:             // This should not be needed as we make sure to register valid
michael@0:             // projects, but in the past (before bug 924568), we might have
michael@0:             // registered invalid objects.
michael@0:             projects.push(cursor.value);
michael@0:           }
michael@0:           cursor.continue();
michael@0:         } else {
michael@0:           deferred.resolve(projects);
michael@0:         }
michael@0:       };
michael@0:     };
michael@0: 
michael@0:     return deferred.promise;
michael@0:   },
michael@0: 
michael@0:   add: function(project) {
michael@0:     let deferred = promise.defer();
michael@0: 
michael@0:     if (!project.location) {
michael@0:       // We need to make sure this object has a `.location` property.
michael@0:       deferred.reject("Missing location property on project object.");
michael@0:     } else {
michael@0:       let transaction = IDB._db.transaction(["projects"], "readwrite");
michael@0:       let objectStore = transaction.objectStore("projects");
michael@0:       let request = objectStore.add(project);
michael@0:       request.onerror = function(event) {
michael@0:         deferred.reject("Unable to add project to the AppProjects indexedDB: " +
michael@0:                         this.error.name + " - " + this.error.message );
michael@0:       };
michael@0:       request.onsuccess = function() {
michael@0:         deferred.resolve();
michael@0:       };
michael@0:     }
michael@0: 
michael@0:     return deferred.promise;
michael@0:   },
michael@0: 
michael@0:   update: function(project) {
michael@0:     let deferred = promise.defer();
michael@0: 
michael@0:     var transaction = IDB._db.transaction(["projects"], "readwrite");
michael@0:     var objectStore = transaction.objectStore("projects");
michael@0:     var request = objectStore.put(project);
michael@0:     request.onerror = function(event) {
michael@0:       deferred.reject("Unable to update project to the AppProjects indexedDB: " +
michael@0:                       this.error.name + " - " + this.error.message );
michael@0:     };
michael@0:     request.onsuccess = function() {
michael@0:       deferred.resolve();
michael@0:     };
michael@0: 
michael@0:     return deferred.promise;
michael@0:   },
michael@0: 
michael@0:   remove: function(location) {
michael@0:     let deferred = promise.defer();
michael@0: 
michael@0:     let request = IDB._db.transaction(["projects"], "readwrite")
michael@0:                     .objectStore("projects")
michael@0:                     .delete(location);
michael@0:     request.onsuccess = function(event) {
michael@0:       deferred.resolve();
michael@0:     };
michael@0:     request.onerror = function() {
michael@0:       deferred.reject("Unable to delete project to the AppProjects indexedDB: " +
michael@0:                       this.error.name + " - " + this.error.message );
michael@0:     };
michael@0: 
michael@0:     return deferred.promise;
michael@0:   }
michael@0: };
michael@0: 
michael@0: const store = new ObservableObject({ projects:[] });
michael@0: 
michael@0: let loadDeferred = promise.defer();
michael@0: 
michael@0: IDB.open().then(function (projects) {
michael@0:   store.object.projects = projects;
michael@0:   AppProjects.emit("ready", store.object.projects);
michael@0:   loadDeferred.resolve();
michael@0: });
michael@0: 
michael@0: const AppProjects = {
michael@0:   load: function() {
michael@0:     return loadDeferred.promise;
michael@0:   },
michael@0: 
michael@0:   addPackaged: function(folder) {
michael@0:     let project = {
michael@0:       type: "packaged",
michael@0:       location: folder.path,
michael@0:       // We need a unique id, that is the app origin,
michael@0:       // in order to identify the app when being installed on the device.
michael@0:       // The packaged app local path is a valid id, but only on the client.
michael@0:       // This origin will be used to generate the true id of an app:
michael@0:       // its manifest URL.
michael@0:       // If the app ends up specifying an explicit origin in its manifest,
michael@0:       // we will override this random UUID on app install.
michael@0:       packagedAppOrigin: generateUUID().toString().slice(1, -1)
michael@0:     };
michael@0:     return IDB.add(project).then(function () {
michael@0:       store.object.projects.push(project);
michael@0:       // return the added objects (proxified)
michael@0:       return store.object.projects[store.object.projects.length - 1];
michael@0:     });
michael@0:   },
michael@0: 
michael@0:   addHosted: function(manifestURL) {
michael@0:     let project = {
michael@0:       type: "hosted",
michael@0:       location: manifestURL
michael@0:     };
michael@0:     return IDB.add(project).then(function () {
michael@0:       store.object.projects.push(project);
michael@0:       // return the added objects (proxified)
michael@0:       return store.object.projects[store.object.projects.length - 1];
michael@0:     });
michael@0:   },
michael@0: 
michael@0:   update: function (project) {
michael@0:     return IDB.update({
michael@0:       type: project.type,
michael@0:       location: project.location,
michael@0:       packagedAppOrigin: project.packagedAppOrigin
michael@0:     }).then(() => project);
michael@0:   },
michael@0: 
michael@0:   remove: function(location) {
michael@0:     return IDB.remove(location).then(function () {
michael@0:       let projects = store.object.projects;
michael@0:       for (let i = 0; i < projects.length; i++) {
michael@0:         if (projects[i].location == location) {
michael@0:           projects.splice(i, 1);
michael@0:           return;
michael@0:         }
michael@0:       }
michael@0:       throw new Error("Unable to find project in AppProjects store");
michael@0:     });
michael@0:   },
michael@0: 
michael@0:   get: function(location) {
michael@0:     let projects = store.object.projects;
michael@0:     for (let i = 0; i < projects.length; i++) {
michael@0:       if (projects[i].location == location) {
michael@0:         return projects[i];
michael@0:       }
michael@0:     }
michael@0:     return null;
michael@0:   },
michael@0: 
michael@0:   store: store
michael@0: };
michael@0: 
michael@0: EventEmitter.decorate(AppProjects);
michael@0: 
michael@0: exports.AppProjects = AppProjects;
michael@0: