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/**
* GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
* *
* Copyright (C) 2011, 2012, 2013, 2014 Loic J. Duros
* Copyright (C) 2014, 2015 Nik Nyby
*
* This file is part of GNU LibreJS.
*
* GNU LibreJS is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GNU LibreJS 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 GNU LibreJS. If not, see <http://www.gnu.org/licenses/>.
*/
/*jshint esnext: true */
const { Cc, Ci, Cu, components } = require("chrome");
const { NetUtil } = Cu.import("resource://gre/modules/NetUtil.jsm");
const { FileUtils } = Cu.import("resource://gre/modules/FileUtils.jsm");
var relationChecker = require("../js_checker/relation_checker")
.relationChecker;
var rc = relationChecker(); // a dummy object for legacy module.
const AUTHOR_REASON = require("../script_entries/free_libraries")
.AUTHOR_REASON;
var relationChecker = require("../js_checker/relation_checker")
.relationChecker;
const scriptsCached = require("../script_entries/scripts_cache")
.scriptsCached;
let librejsStorage = {
file: null,
filename: 'librejs-whitelist.json',
data: [],
onLoad: function (callback) {
// will read the json file.
this.init();
this.read(callback);
},
init: function () {
// get the "librejs-whitelist.json" file in the profile directory
this.file = FileUtils.getFile("ProfD", [this.filename]);
},
read: function (callback) {
// Content type hint is useful on mobile platforms where the filesystem
// would otherwise try to determine the content type.
var channel = NetUtil.newChannel(this.file);
var that = this;
channel.contentType = "application/json";
try {
NetUtil.asyncFetch(channel, function(inputStream, status) {
if (!components.isSuccessCode(status)) {
require("../script_entries/free_libraries").init();
that.initialWrite();
}
var raw_data = NetUtil.readInputStreamToString(
inputStream, inputStream.available());
// expand json file back to original contents.
var re = new RegExp(
"[freelib]".replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'),
'g'
);
raw_data = raw_data.replace(re, AUTHOR_REASON);
//console.debug("raw_data is ", raw_data);
// The file data is contained within inputStream.
// You can read it into a string with
// get string into json also
that.data = JSON.parse(raw_data);
callback(that.data);
});
} catch (e) {
that.initialWrite();
}
},
initialWrite: function (callback) {
console.debug("About to write free libraries");
// our file is not populated with default contents.
// use free_libraries.js to populate.
require("../script_entries/free_libraries").init();
this.writeCacheToDB(callback);
},
/**
* writes the contents of scriptsCached to the persistent
* JSON file.
*/
writeCacheToDB: function (callback) {
console.debug("writing to db");
data = scriptsCached.getCacheForWriting();
json = JSON.stringify(data);
// make json file smaller.
var re = new RegExp(
AUTHOR_REASON.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'), 'g');
json = json.replace(re, "[freelib]");
var rc = JSON.stringify(relationChecker());
re = new RegExp(rc.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'), 'g');
json = json.replace(re, "\"[rl]\"");
//console.debug("this.data is now", this.data);
this.write(callback, json);
},
generateCacheFromDB: function (callback) {
if (typeof callback === 'undefined') {
callback = function () {
// nothing to do.
};
}
this.read(function (data) {
scriptsCached.bulkImportCache(data);
});
},
write: function (onDataWritten, json) {
this.init();
var str;
if (typeof json === 'undefined') {
str = JSON.stringify(this.data);
} else {
// we are passing json already formatted.
str = json;
}
var ostream = FileUtils.openSafeFileOutputStream(this.file);
var converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]
.createInstance(Ci.nsIScriptableUnicodeConverter);
converter.charset = "UTF-8";
var istream = converter.convertToInputStream(str);
// The last argument (the callback) is optional.
NetUtil.asyncCopy(istream, ostream, function(status) {
if (!components.isSuccessCode(status)) {
// Handle error!
return;
}
if (!onDataWritten) {
console.debug("onDataWritten is not defined");
onDataWritten = function () {
console.debug("onDataWritten dummy callback triggered");
};
}
// Data has been written to the file.
onDataWritten();
});
},
/**
* getEntry -- Returns a storage entry if it is present.
*/
getEntry: function (hash) {
var entry = this.data[hash];
if (entry) {
if (entry.result === '[freelib]') {
entry.result = {
'type': 4,
'reason': 'This script has been tagged as free ' +
'software by LibreJS authors.'
};
}
entry.relationChecker = rc;
return entry;
}
return false;
}
};
exports.librejsStorage = librejsStorage;
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