1 files changed, 41 insertions, 0 deletions
diff --git a/lib/js_checker/js_checker.js b/lib/js_checker/js_checker.js
index 3b03084..21bfeaf 100644
--- a/lib/js_checker/js_checker.js
+++ b/lib/js_checker/js_checker.js
@@ -3,6 +3,7 @@
  * *
  * Copyright (C) 2011, 2012, 2013, 2014 Loic J. Duros
  * Copyright (C) 2014, 2015 Nik Nyby
+ * Copyright (C) 2015 Ruben Rodriguez
  *
  * This file is part of GNU LibreJS.
  *
@@ -115,6 +116,46 @@ var JsChecker = function() {
 };
 
 /**
+ * isFreeLicensed
+ *
+ * This function returns true if the input script is licensed under
+ * a free license. Otherwise, it returns false.
+ */
+JsChecker.prototype.isFreeLicensed = function(script) {
+    var magnets = '(' +
+        'magnet:\\?xt=urn:btih:90dc5c0be029de84e523b9b3922520e79e0e6f08&dn=cc0.txt|' +
+        'magnet:\\?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt|' +
+        'magnet:\\?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt|' +
+        'magnet:\\?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7&dn=apache-2.0.txt|' +
+        'magnet:\\?xt=urn:btih:5de60da917303dbfad4f93fb1b985ced5a89eac2&dn=lgpl-2.1.txt|' +
+        'magnet:\\?xt=urn:btih:0ef1b8170b3b615170ff270def6427c317705f85&dn=lgpl-3.0.txt|' +
+        'magnet:\\?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt|' +
+        'magnet:\\?xt=urn:btih:c80d50af7d3db9be66a4d0a86db0286e4fd33292&dn=bsd-3-clause.txt|' +
+        'magnet:\\?xt=urn:btih:3877d6d54b3accd4bc32f8a48bf32ebc0901502a&dn=mpl-2.0.txt|' +
+        'magnet:\\?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt|' +
+        'magnet:\\?xt=urn:btih:5305d91886084f776adcf57509a648432709a7c7&dn=x11.txt|' +
+        'magnet:\\?xt=urn:btih:12f2ec9e8de2a3b0002a33d518d6010cc8ab2ae9&dn=xfree86.txt|' +
+        'magnet:\\?xt=urn:btih:87f119ba0b429ba17a44b4bffcab33165ebdacc0&dn=freebsd.txt|' +
+        'magnet:\\?xt=urn:btih:b8999bbaf509c08d127678643c515b9ab0836bae&dn=ISC.txt|' +
+        'magnet:\\?xt=urn:btih:54fd2283f9dbdf29466d2df1a98bf8f65cafe314&dn=artistic-2.0.txt|' +
+        'magnet:\\?xt=urn:btih:e95b018ef3580986a04669f1b5879592219e2a7a&dn=public-domain.txt' +
+        ')';
+
+    // Remove licensed parts
+    var re = new RegExp(
+        '@license +' + magnets + '.*([\n\r].*?)*@license-end', 'g');
+    script = script.replace(re, '');
+
+    // Remove comments and empty lines
+    re = new RegExp('\/\/.*|/\\*.*?\\*/|^\s*[\n\r]*', 'gm');
+
+    script = script.replace(re, "");
+
+    // If only spaces remain, the file has a free license
+    return (script.match(/\S/) === null);
+};
+
+/**
  * searchJs
  *
  * Takes in some javascript code (as string).