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Unified Diff: lib/storage/io.js

Issue 5088751004942336: Issue 370 - Right-clicked element is removed independent of created filter (Closed)
Patch Set: Rebase to rev 3c9cea80c481 Created July 18, 2014, 8:54 a.m.
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Index: lib/storage/io.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/lib/storage/io.js
@@ -0,0 +1,129 @@
+/*
+ * This file is part of Adblock Plus <http://adblockplus.org/>,
+ * Copyright (C) 2006-2014 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+//
+// No direct file system access, using LocalStorage API
+//
+
+var IO = exports.IO =
+{
+ _getFilePath: function(file)
+ {
+ if (file instanceof FakeFile)
+ return file.path;
+ else if ("spec" in file)
+ return file.spec;
+
+ throw new Error("Unexpected file type");
+ },
+
+ _setFileContents: function(path, contents, lastModified)
+ {
+ ext.storage[path] = contents;
+ ext.storage[path + "/lastModified"] = lastModified || 0;
+ },
+
+ lineBreak: "\n",
+
+ resolveFilePath: function(path)
+ {
+ return new FakeFile(path);
+ },
+
+ readFromFile: function(file, listener, callback, timeLineID)
+ {
+ var Utils = require("utils").Utils;
+ Utils.runAsync(function()
+ {
+ var path = this._getFilePath(file);
+ if (!(path in ext.storage))
+ {
+ callback(new Error("File doesn't exist"))
+ return;
+ }
+
+ var lines = ext.storage[path].split(/[\r\n]+/);
+ for (var i = 0; i < lines.length; i++)
+ listener.process(lines[i]);
+ listener.process(null);
+ callback(null);
+ }.bind(this));
+ },
+
+ writeToFile: function(file, data, callback, timeLineID)
+ {
+ var path = this._getFilePath(file);
+ this._setFileContents(path, data.join(this.lineBreak) + this.lineBreak, Date.now());
+
+ var Utils = require("utils").Utils;
+ Utils.runAsync(callback, null, null);
+ },
+
+ copyFile: function(fromFile, toFile, callback)
+ {
+ // Simply combine read and write operations
+ var data = [];
+ this.readFromFile(fromFile, {
+ process: function(line)
+ {
+ if (line !== null)
+ data.push(line);
+ }
+ }, function(e)
+ {
+ if (e)
+ callback(e);
+ else
+ this.writeToFile(toFile, data, callback);
+ }.bind(this));
+ },
+
+ renameFile: function(fromFile, newName, callback)
+ {
+ var path = this._getFilePath(fromFile);
+ if (!(path in ext.storage))
+ {
+ callback(new Error("File doesn't exist"))
+ return;
+ }
+
+ this._setFileContents(newName, ext.storage[path], ext.storage[path + "/lastModified"]);
+ this.removeFile(fromFile, callback);
+ },
+
+ removeFile: function(file, callback)
+ {
+ var path = this._getFilePath(file);
+ delete ext.storage[path];
+ delete ext.storage[path + "/lastModified"];
+ callback(null);
+ },
+
+ statFile: function(file, callback)
+ {
+ var path = this._getFilePath(file);
+
+ // This needs to use Utils.runAsync(), otherwise FilterStorage might
+ // initialize too early - see #337.
+ require("utils").Utils.runAsync(callback.bind(null, null, {
+ exists: path in ext.storage,
+ isDirectory: false,
+ isFile: true,
+ lastModified: parseInt(ext.storage[path + "/lastModified"], 10) || 0
+ }));
+ }
+};
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