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/**
* GNU LibreJS - A browser add-on to block nonfree nontrivial JavaScript.
* *
* Copyright (C) 2018 Nathan Nichols
*
* 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/>.
*/
var data = require("./license_definitions.js");
var match_utils = require("./pattern_utils.js").patternUtils;
var licStartLicEndRe = /@licstartThefollowingistheentirelicensenoticefortheJavaScriptcodeinthis(?:page|file)(.*)?@licendTheaboveistheentirelicensenoticefortheJavaScriptcodeinthis(?:page|file)/mi;
/**
* stripLicenseToRegexp
*
* Removes all non-alphanumeric characters except for the
* special tokens, and replace the text values that are
* hardcoded in license_definitions.js
*
*/
var stripLicenseToRegexp = function (license) {
var max = license.licenseFragments.length;
var item;
for (var i = 0; i < max; i++) {
item = license.licenseFragments[i];
item.regex = match_utils.removeNonalpha(item.text);
item.regex = new RegExp(
match_utils.replaceTokens(item.regex), 'g');
}
return license;
};
var license_regexes = [];
var init = function(){
console.log("initializing regexes");
for (var item in data.licenses) {
license_regexes.push(stripLicenseToRegexp(data.licenses[item]));
}
//console.log(license_regexes);
}
module.exports.init = init;
/**
*
* Takes in the declaration that has been preprocessed and
* tests it against regexes in our table.
*/
var search_table = function(stripped_comment){
var stripped = match_utils.removeNonalpha(stripped_comment);
//stripped = stripped.replaceTokens(stripped_comment);
//console.log("Looking up license");
//console.log(stripped);
for (license in data.licenses) {
frag = data.licenses[license].licenseFragments;
max_i = data.licenses[license].licenseFragments.length;
for (i = 0; i < max_i; i++) {
if (frag[i].regex.test(stripped)) {
console.log(data.licenses[license].licenseName);
return true;
}
}
}
console.log("No license found.");
return false;
}
/**
* Takes the "first comment available on the page"
* returns true for "free" and false for anything else
*/
var check = function(license_text){
//console.log("checking...");
//console.log(license_text);
if(license_text === undefined || license_text === null || license_text == ""){
//console.log("Was not an inline script");
return false;
}
// remove whitespace
var stripped = match_utils.removeWhitespace(license_text);
// Search for @licstart/@licend
// This assumes that there isn't anything before the comment
var matches = stripped.match(licStartLicEndRe);
if(matches == null){
return false;
}
var declaration = matches[0];
return search_table(declaration);
};
module.exports.check = check;
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