began to implement old declaration method

1 files changed, 117 insertions, 0 deletions

diff --git a/legacy_license_check.js b/legacy_license_check.js
new file mode 100644
index 0000000..dc3458a
--- /dev/null
+++ b/legacy_license_check.js
@@ -0,0 +1,117 @@
+/**
+* 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];
+	
+	console.log("Got to this point");
+	console.log(declaration);
+
+	return search_table(declaration);
+
+};
+
+module.exports.check = check;