mirror of
https://github.com/shaka-project/shaka-player.git
synced 2026-06-19 16:47:01 +03:00
Aaron Vaage
1cf0a38843
Added a DB Upgrade path for converting content from version 1 to the version 2 format. Issue #1047 Change-Id: Id8dc626d8289b08ca300c40b137173c0c6ec9d35
88 lines
2.2 KiB
JavaScript
88 lines
2.2 KiB
JavaScript
/**
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* @license
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* Copyright 2016 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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goog.provide('shaka.offline.DBUtils');
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/**
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* @enum {string}
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*/
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shaka.offline.DBUtils.Mode = {
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READ_ONLY: 'readonly',
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READ_WRITE: 'readwrite'
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};
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/**
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* The name for the stores that are used in the version 2 of our
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* indexed db storage.
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*
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* @enum {string}
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*/
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shaka.offline.DBUtils.StoreV2 = {
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MANIFEST: 'manifest-v2',
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SEGMENT: 'segment-v2'
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};
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/**
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* The name for the stores that are used in the version 1 of our
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* indexed db storage.
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*
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* @enum {string}
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*/
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shaka.offline.DBUtils.StoreV1 = {
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MANIFEST: 'manifest',
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SEGMENT: 'segment'
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};
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/**
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* @param {IDBObjectStore} store
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* @param {function(number, Object)} callback
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*/
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shaka.offline.DBUtils.forEach = function(store, callback) {
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/** @type {IDBRequest} */
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var request = store.openCursor();
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request.onsuccess = function(event) {
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/** @type {IDBCursor} */
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var cursor = event.target.result;
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if (!cursor) {
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// When we reach the end of the data that the cursor is iterating
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// over, |event.target.result| will be null to signal the end of the
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// iteration.
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// https://developer.mozilla.org/en-US/docs/Web/API/IDBCursor/continue
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return;
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}
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// Save the key and value so that we can still access them even if the
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// database's state changes because of the callback.
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/** @type {number} */
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var key = /** @type {number} */ (cursor.key);
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/** @type {Object} */
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var value = /** @type {Object} */ (cursor.value);
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// Advance the cursor before calling the callback so that it will work
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// even if the database's state changes because of the callback.
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cursor.continue();
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callback(key, value);
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};
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};
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