Side by Side Diff: lib/io.js
Issue 29796555:
Issue 6621 (Closed)
Patch Set:
Created June 1, 2018, 1:58 p.m.
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« ensure_dependencies.py ('k')
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lib/ioIndexedDB.js » ('j')
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lib/ioIndexedDB.js » ('J')
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| 1 /* | |
| 2 * This file is part of Adblock Plus <https://adblockplus.org/>, | |
| 3 * Copyright (C) 2006-present eyeo GmbH | |
| 4 * | |
| 5 * Adblock Plus is free software: you can redistribute it and/or modify | |
| 6 * it under the terms of the GNU General Public License version 3 as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * Adblock Plus is distributed in the hope that it will be useful, | |
| 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 * GNU General Public License for more details. | |
| 13 * | |
| 14 * You should have received a copy of the GNU General Public License | |
| 15 * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>. | |
| 16 */ | |
| 17 | |
| 18 "use strict"; | |
| 19 | |
| 20 const keyPrefix = "file:"; | |
| 21 | |
| 22 function fileToKey(fileName) | |
| 23 { | |
| 24 return keyPrefix + fileName; | |
| 25 } | |
| 26 | |
| 27 function loadFile(fileName) | |
| 28 { | |
| 29 let key = fileToKey(fileName); | |
| 30 return browser.storage.local.get(key).then(items => | |
| 31 { | |
| 32 let entry = items[key]; | |
| 33 if (entry) | |
| 34 return entry; | |
| 35 throw {type: "NoSuchFile"}; | |
| 36 }); | |
| 37 } | |
| 38 | |
| 39 function saveFile(fileName, data) | |
| 40 { | |
| 41 return browser.storage.local.set({ | |
| 42 [fileToKey(fileName)]: { | |
| 43 content: Array.from(data), | |
| 44 lastModified: Date.now() | |
| 45 } | |
| 46 }); | |
| 47 } | |
| 48 | |
| 49 exports.IO = | |
| 50 { | |
| 51 /** | |
| 52 * Reads text lines from a file. | |
| 53 * @param {string} fileName | |
| 54 * Name of the file to be read | |
| 55 * @param {TextSink} listener | |
| 56 * Function that will be called for each line in the file | |
| 57 * @return {Promise} | |
| 58 * Promise to be resolved or rejected once the operation is completed | |
| 59 */ | |
| 60 readFromFile(fileName, listener) | |
| 61 { | |
| 62 return loadFile(fileName).then(entry => | |
| 63 { | |
| 64 for (let line of entry.content) | |
| 65 listener(line); | |
| 66 }); | |
| 67 }, | |
| 68 | |
| 69 /** | |
| 70 * Writes text lines to a file. | |
| 71 * @param {string} fileName | |
| 72 * Name of the file to be written | |
| 73 * @param {Iterable.<string>} data | |
| 74 * An array-like or iterable object containing the lines (without line | |
| 75 * endings) | |
| 76 * @return {Promise} | |
| 77 * Promise to be resolved or rejected once the operation is completed | |
| 78 */ | |
| 79 writeToFile(fileName, data) | |
| 80 { | |
| 81 return saveFile(fileName, data); | |
| 82 }, | |
| 83 | |
| 84 /** | |
| 85 * Copies a file. | |
| 86 * @param {string} fromFile | |
| 87 * Name of the file to be copied | |
| 88 * @param {string} toFile | |
| 89 * Name of the file to be written, will be overwritten if exists | |
| 90 * @return {Promise} | |
| 91 * Promise to be resolved or rejected once the operation is completed | |
| 92 */ | |
| 93 copyFile(fromFile, toFile) | |
| 94 { | |
| 95 return loadFile(fromFile).then(entry => saveFile(toFile, entry.content)); | |
| 96 }, | |
| 97 | |
| 98 /** | |
| 99 * Renames a file. | |
| 100 * @param {string} fromFile | |
| 101 * Name of the file to be renamed | |
| 102 * @param {string} newName | |
| 103 * New file name, will be overwritten if exists | |
| 104 * @return {Promise} | |
| 105 * Promise to be resolved or rejected once the operation is completed | |
| 106 */ | |
| 107 renameFile(fromFile, newName) | |
| 108 { | |
| 109 return loadFile(fromFile) | |
| 110 .then(entry => browser.storage.local.set({[fileToKey(newName)]: entry})) | |
| 111 .then(() => this.removeFile(fromFile)); | |
| 112 }, | |
| 113 | |
| 114 /** | |
| 115 * Removes a file. | |
| 116 * @param {string} fileName | |
| 117 * Name of the file to be removed | |
| 118 * @return {Promise} | |
| 119 * Promise to be resolved or rejected once the operation is completed | |
| 120 */ | |
| 121 removeFile(fileName) | |
| 122 { | |
| 123 return browser.storage.local.remove(fileToKey(fileName)); | |
| 124 }, | |
| 125 | |
| 126 /** | |
| 127 * Retrieves file metadata. | |
| 128 * @param {string} fileName | |
| 129 * Name of the file to be looked up | |
| 130 * @return {Promise.<StatData>} | |
| 131 * Promise to be resolved with file metadata once the operation is | |
| 132 * completed | |
| 133 */ | |
| 134 statFile(fileName) | |
| 135 { | |
| 136 return loadFile(fileName).then(entry => | |
| 137 { | |
| 138 return { | |
| 139 exists: true, | |
| 140 lastModified: entry.lastModified | |
| 141 }; | |
| 142 }).catch(error => | |
| 143 { | |
| 144 if (error.type == "NoSuchFile") | |
| 145 return {exists: false}; | |
| 146 throw error; | |
| 147 }); | |
| 148 } | |
| 149 }; | |
| OLD | NEW |
« dependencies ('K')
|
« ensure_dependencies.py ('k')
|
lib/ioIndexedDB.js » ('j')
|
lib/ioIndexedDB.js » ('J')
