103 lines
2.9 KiB
JavaScript
103 lines
2.9 KiB
JavaScript
"use strict";
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var OldFileStore = function(storage, prefix) {
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var self = this;
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this.saveFile = function(name, text) {
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storage.setItem(prefix + name, text);
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}
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this.loadFile = function(name) {
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return storage.getItem(prefix + name) || storage.getItem(name);
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}
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this.getFiles = function(prefix2) {
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// iterate over files with <platform>/<dir> prefix
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var files = [];
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for (var i = 0; i < storage.length; i++) {
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var key = storage.key(i);
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if (key.startsWith(prefix + prefix2)) {
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var name = key.substring(prefix.length + prefix2.length);
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files.push(name);
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}
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}
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return files;
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}
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this.deleteFile = function(name) {
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storage.removeItem(prefix + name);
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storage.removeItem(prefix + 'local/' + name);
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}
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}
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// localforage-compatible driver for old file store format
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var OldFileStoreDriver = {
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_driver: 'oldFileStoreDriver',
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_initStorage: function(options) {
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this._store = new OldFileStore(localStorage, options.name + '/');
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},
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clear: function(callback) {
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// Custom implementation here...
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},
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getItem: function(key, callback) {
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callback(null, this._store.loadFile(key));
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},
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iterate: function(iteratorCallback, successCallback) {
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// Custom implementation here...
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},
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key: function(n, callback) {
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// Custom implementation here...
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},
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keys: function(callback) {
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callback(this._store.getFiles(''));
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},
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length: function(callback) {
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callback(this._store.getFiles('').length);
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},
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removeItem: function(key, callback) {
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this._store.deleteFile(key);
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callback();
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},
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setItem: function(key, value, callback) {
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this._store.saveFile(key, value);
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callback();
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}
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}
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localforage.defineDriver(OldFileStoreDriver);
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// copy localStorage to new driver
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function copyFromOldStorageFormat(platform_id, newstore) {
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var alreadyMigratedKey = "__migrated_" + platform_id;
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//localStorage.removeItem(alreadyMigratedKey);
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if (localStorage.getItem(alreadyMigratedKey))
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return;
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var oldstore = new OldFileStore(localStorage, platform_id + '/');
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var keys = oldstore.getFiles('');
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// no files to convert?
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if (keys.length == 0) {
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localStorage.setItem(alreadyMigratedKey, 'true');
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return;
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}
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// convert function
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function migrateNext() {
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var key = keys.shift();
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var value = oldstore.loadFile(key);
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newstore.setItem(key, value, function(err, result) {
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if (err) {
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console.log(err);
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} else {
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console.log("Converted " + key);
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if (keys.length) {
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migrateNext();
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} else {
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newstore.length(function(err, len) {
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console.log("Migrated " + len + " local files to new data store");
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if (len) {
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localStorage.setItem(alreadyMigratedKey, 'true');
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window.location.reload();
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}
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});
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}
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}
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});
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}
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migrateNext(); // start the conversion
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}
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