lib/websql/io.js - Issue 5732725684174848: Use safari.extension.settings instead of localStorage and WebSQL

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Issue 5732725684174848: Use safari.extension.settings instead of localStorage and WebSQL (Closed)

Patch Set: Created March 12, 2014, 2:11 p.m.

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1 /*

2 * This file is part of Adblock Plus <http://adblockplus.org/>,

3 * Copyright (C) 2006-2013 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 //

19 // No direct file system access, using WebSQL API

20 //

21

22 var IO = exports.IO =

23 {

24 _db: null,

25 lineBreak: "\n",

26

27 _transaction: function(callback)

28 {

29 var dbCreated = false;

30 if (!this._db)

31 this._db = openDatabase("adblockplus", "1.0", "", 102400, function() { dbC reated = true; });

32

33 this._db.transaction(function(tx)

34 {

35 if (dbCreated)

36 tx.executeSql("CREATE TABLE files (path unique, last_modified, content)" );

37

38 callback(tx);

39 });

40 },

41 _getFilePath: function(file)

42 {

43 if (file instanceof FakeFile)

44 return file.path;

45 if ("spec" in file)

46 return file.spec;

47

48 throw new Error("Unexpected file type");

49 },

50 resolveFilePath: function(path)

51 {

52 return new FakeFile(path);

53 },

54 readFromFile: function(file, decode, listener, callback, timeLineID)

55 {

56 if ("spec" in file && /^defaults\b/.test(file.spec))

57 {

58 // Code attempts to read the default patterns.ini, we don't have that.

59 // Make sure to execute first-run actions instead.

60 var Utils = require("utils").Utils;

61 Utils.runAsync(function()

62 {

63 if (localStorage.currentVersion)

64 seenDataCorruption = true;

65 delete localStorage.currentVersion;

66 callback(null);

67 });

68 return;

69 }

70

71 var path = this._getFilePath(file);

72 var runAsync = require("utils").Utils.runAsync;

73

74 this._transaction(function(tx)

75 {

76 tx.executeSql(

77 "SELECT content FROM files WHERE path = ?",

78 [path],

79 function(tx, results)

80 {

81 if (results.rows.length == 0)

82 {

83 runAsync(callback, null, new Error("File doesn't exist"));

84 return;

85 }

86

87 var lines = results.rows.item(0).content.split(/[\r\n]+/);

88 runAsync(function()

89 {

90 for (var i = 0; i < lines.length; i++)

91 listener.process(lines[i]);

92 listener.process(null);

93 callback(null);

94 });

95 }

96 );

97 });

98 },

99 writeToFile: function(file, encode, data, callback, timeLineID)

100 {

101 var path = this._getFilePath(file);

102 var lnbr = this.lineBreak;

103 var runAsync = require("utils").Utils.runAsync;

104

105 this._transaction(function(tx)

106 {

107 tx.executeSql(

108 "INSERT OR REPLACE INTO files VALUES (?, ?, ?)",

109 [path, Date.now(), data.join(lnbr) + lnbr],

110 function() { runAsync(callback, null, null); }

111 );

112 });

113 },

114 copyFile: function(fromFile, toFile, callback)

115 {

116 var fromPath = this._getFilePath(fromFile);

117 var toPath = this._getFilePath(toFile);

118 var runAsync = require("utils").Utils.runAsync;

119

120 this._transaction(function(tx)

121 {

122 tx.executeSql(

123 "INSERT OR REPLACE INTO files SELECT ?, ?, content FROM files WHERE path = ?",

124 [toPath, Date.now(), fromPath],

125 function(tx, results)

126 {

127 if (results.rowsAffected == 0)

128 runAsync(callback, null, new Error("File doesn't exist"));

129 else

130 runAsync(callback, null, null);

131 }

132 );

133 });

134 },

135 renameFile: function(fromFile, newName, callback)

136 {

137 var path = this._getFilePath(fromFile);

138 var runAsync = require("utils").Utils.runAsync;

139

140 this._transaction(function(tx)

141 {

142 tx.executeSql(

143 "UPDATE files SET path = ? WHERE path = ?",

144 [newName, path],

145 function(tx, results)

146 {

147 if (results.rowsAffected == 0)

148 runAsync(callback, null, new Error("File doesn't exist"));

149 else

150 runAsync(callback, null, null);

151 }

152 );

153 });

154 },

155 removeFile: function(file, callback)

156 {

157 var path = this._getFilePath(file);

158 var runAsync = require("utils").Utils.runAsync;

159

160 this._transaction(function(tx)

161 {

162 tx.executeSql(

163 "DELETE FROM files WHERE path = ?",

164 [path],

165 function() { runAsync(callback, null, null); }

166 );

167 });

168 },

169 statFile: function(file, callback)

170 {

171 var path = this._getFilePath(file);

172 var runAsync = require("utils").Utils.runAsync;

173

174 this._transaction(function(tx)

175 {

176 tx.executeSql(

177 "SELECT last_modified FROM files WHERE path = ?",

178 [path],

179 function(tx, results)

180 {

181 if (results.rows.length == 0)

182 runAsync(callback, null, null, {

183 exists: false,

184 isDirectory: false,

185 isFile: false,

186 lastModified: 0

187 });

188 else

189 runAsync(callback, null, null, {

190 exists: true,

191 isDirectory: false,

192 isFile: true,

193 lastModified: results.rows.item(0).last_modified

194 });

195 }

196 );

197 });

198 }

199 };

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