diff options
Diffstat (limited to 'mascara/src/lib/index-db-controller.js')
-rw-r--r-- | mascara/src/lib/index-db-controller.js | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/mascara/src/lib/index-db-controller.js b/mascara/src/lib/index-db-controller.js deleted file mode 100644 index 8db1d5d21..000000000 --- a/mascara/src/lib/index-db-controller.js +++ /dev/null @@ -1,88 +0,0 @@ -const EventEmitter = require('events') -module.exports = class IndexDbController extends EventEmitter { - - constructor (opts) { - super() - this.migrations = opts.migrations - this.key = opts.key - this.dbObject = global.indexedDB - this.IDBTransaction = global.IDBTransaction || global.webkitIDBTransaction || global.msIDBTransaction || {READ_WRITE: "readwrite"}; // This line should only be needed if it is needed to support the object's constants for older browsers - this.IDBKeyRange = global.IDBKeyRange || global.webkitIDBKeyRange || global.msIDBKeyRange; - this.version = opts.version - this.logging = opts.logging - this.initialState = opts.initialState - if (this.logging) this.on('log', logger) - } - - // Opens the database connection and returns a promise - open (version = this.version) { - return new Promise((resolve, reject) => { - const dbOpenRequest = this.dbObject.open(this.key, version) - dbOpenRequest.onerror = (event) => { - return reject(event) - } - dbOpenRequest.onsuccess = (event) => { - this.db = dbOpenRequest.result - this.emit('success') - resolve(this.db) - } - dbOpenRequest.onupgradeneeded = (event) => { - this.db = event.target.result - this.db.createObjectStore('dataStore') - } - }) - .then((openRequest) => { - return this.get('dataStore') - }) - .then((data) => { - if (!data) { - return this._add('dataStore', this.initialState) - .then(() => this.get('dataStore')) - .then((versionedData) => Promise.resolve(versionedData)) - } - return Promise.resolve(data) - }) - } - - requestObjectStore (key, type = 'readonly') { - return new Promise((resolve, reject) => { - const dbReadWrite = this.db.transaction(key, type) - const dataStore = dbReadWrite.objectStore(key) - resolve(dataStore) - }) - } - - get (key = 'dataStore') { - return this.requestObjectStore(key) - .then((dataObject)=> { - return new Promise((resolve, reject) => { - const getRequest = dataObject.get(key) - getRequest.onsuccess = (event) => resolve(event.currentTarget.result) - getRequest.onerror = (event) => reject(event) - }) - }) - } - - put (state) { - return this.requestObjectStore('dataStore', 'readwrite') - .then((dataObject)=> { - const putRequest = dataObject.put(state, 'dataStore') - putRequest.onsuccess = (event) => Promise.resolve(event.currentTarget.result) - putRequest.onerror = (event) => Promise.reject(event) - }) - } - - _add (key, objStore, cb = logger) { - return this.requestObjectStore(key, 'readwrite') - .then((dataObject)=> { - const addRequest = dataObject.add(objStore, key) - addRequest.onsuccess = (event) => Promise.resolve(event.currentTarget.result) - addRequest.onerror = (event) => Promise.reject(event) - }) - } - -} - -function logger (err, ress) { - err ? console.error(`Logger says: ${err}`) : console.dir(`Logger says: ${ress}`) -} |