1 files changed, 187 insertions, 0 deletions
diff --git a/js/redirect.js b/js/redirect.js
new file mode 100644
index 0000000..41e3c1d
--- /dev/null
+++ b/js/redirect.js
@@ -0,0 +1,187 @@
+
+function Redirect(o) {
+	this._init(o);
+}
+
+//Static
+Redirect.WILDCARD = 'W';
+Redirect.REGEX = 'R';
+
+Redirect.prototype = {
+	
+	//attributes
+	description : '',
+	exampleUrl : '',
+	includePattern : '',
+	excludePattern : '',
+	redirectUrl : '',
+	patternType : '',
+	unescapeMatches : false,
+	escapeMatches : false,
+	disabled : false,
+	
+	compile : function() {
+		this._rxInclude = this._compile(this._includePattern); 
+		this._rxExclude = this._compile(this._excludePattern); 
+	},
+
+	equals : function(redirect) {
+		return this.description == redirect.description
+			&& this.exampleUrl == redirect.exampleUrl
+			&& this.includePattern == redirect.includePattern
+			&& this.excludePattern == redirect.excludePattern
+			&& this.redirectUrl == redirect.redirectUrl
+			&& this.patternType == redirect.patternType
+			&& this.unescapeMatches == redirect.unescapeMatches
+			&& this.escapeMatches == redirect.escapeMatches
+			&& this.appliesTo.toString() == redirect.appliesTo.toString();
+	},
+	
+	toObject : function() {
+		return {
+			description : this.description,
+			exampleUrl : this.exampleUrl,
+			includePattern : this.includePattern,
+			excludePattern : this.excludePattern,
+			redirectUrl : this.redirectUrl,
+			patternType : this.patternType,
+			unescapeMatches : this.unescapeMatches,
+			escapeMatches : this.escapeMatches,
+			disabled : this.disabled,
+			appliesTo : this.appliesTo.slice(0)
+		};
+	},
+
+	getMatch: function(url) {
+		var result = { 
+			isMatch : false, 
+			isExcludeMatch : false, 
+			isDisabledMatch : false, 
+			redirectTo : '',
+			toString : function() { return JSON.stringify(this); }
+		};
+		var redirectTo = null;
+
+		redirectTo = this._includeMatch(url);
+		if (redirectTo !== null) {
+			if (this.disabled) {
+				result.isDisabledMatch = true;
+			} else if (this._excludeMatch(url)) {
+				result.isExcludeMatch = true;
+			} else {
+				result.isMatch = true;
+				result.redirectTo = redirectTo;
+			}
+		}
+		return result;	 
+	},
+	
+	isRegex: function() {
+		return this.patternType == Redirect.REGEX;
+	},
+	
+	isWildcard : function() {
+		return this.patternType == Redirect.WILDCARD;	
+	},
+
+	test : function() {
+		return this.getMatch(this.exampleUrl);	
+	},
+
+	//Private functions below	
+
+	_includePattern : null,
+	_excludePattern : null,
+	_patternType : null,
+	_rxInclude : null,
+	_rxExclude : null,
+	
+	_preparePattern : function(pattern) {
+		if (this.patternType == Redirect.REGEX) {
+			return pattern; 
+		} else { //Convert wildcard to regex pattern
+			var converted = '^';
+			for (var i = 0; i < pattern.length; i++) {
+				var ch = pattern.charAt(i);
+				if ('()[]{}?.^$\\+'.indexOf(ch) != -1) {
+					converted += '\\' + ch;
+				} else if (ch == '*') {
+					converted += '(.*?)';
+				} else {
+					converted += ch;
+				}
+			}
+			converted += '$';
+			return converted;
+		}
+	},
+
+	_compile : function(pattern) {
+		if (!pattern) {
+			return null;
+		}
+		return new RegExp(this._preparePattern(pattern),"gi");
+	},
+	
+	_init : function(o) {
+		this.description = o.description || '',
+		this.exampleUrl = o.exampleUrl || '';
+		this.includePattern = o.includePattern || '';
+		this.excludePattern = o.excludePattern || '';
+		this.redirectUrl = o.redirectUrl || '';
+		this.patternType = o.patternType || Redirect.WILDCARD;
+		this.unescapeMatches = !!o.unescapeMatches;
+		this.escapeMatches = !!o.escapeMatches;
+		this.disabled = !!o.disabled;
+		if (o.appliesTo && o.appliesTo.length) {
+			this.appliesTo = o.appliesTo.slice(0);
+		} else {
+			this.appliesTo = ['main_frame'];
+		}
+	},
+	
+	toString : function() {
+		return 'REDIRECT: {'
+			+  '\n\tExample url 	 : ' + this.exampleUrl
+			+  '\n\tInclude pattern  : ' + this.includePattern
+			+  '\n\tExclude pattern  : ' + this.excludePattern
+			+  '\n\tRedirect url	 : ' + this.redirectUrl
+			+  '\n\tPattern type	 : ' + this.patternType
+			+  '\n\tUnescape matches : ' + this.unescapeMatches
+			+  '\n\tEscape matches : ' + this.escapeMatches
+			+  '\n\tDisabled		 : ' + this.disabled
+			+  '\n}\n';
+	},
+	
+	_includeMatch : function(url) {
+		if (!this._rxInclude) {
+			return null;
+		}	
+		var matches = this._rxInclude.exec(url);
+		if (!matches) {
+			return null;
+		}
+		var resultUrl = this.redirectUrl;
+		for (var i = 1; i < matches.length; i++) {
+			var repl = matches[i] || '';
+			if (this.unescapeMatches) {
+				repl = unescape(repl);
+			}
+			if (this.escapeMatches) {
+				repl = encodeURIComponent(repl);
+			}
+			resultUrl = resultUrl.replace(new RegExp('\\$' + i, 'gi'), repl);
+		}
+		this._rxInclude.lastIndex = 0;
+		return resultUrl;
+	},
+	
+	_excludeMatch : function(url) {
+		if (!this._rxExclude) {
+			return false;	
+		}
+		var shouldExclude = !!this._rxExclude.exec(url);	
+		this._rxExclude.lastIndex = 0;
+		return shouldExclude;
+	}
+};