useful angular filters

filters.js

// converts link in text into anchor
app.filter("link_finder", function(){
	return function(input){
		return input? input.replace(/(\bhttps?:\/\/[^\s<>"`{}|\^\[\]\\]+)/g, "<a href='$1' target='new'>$1</a>") : "";
	};
});

// escape '<' and '>'
app.filter("escape_html", function(){
	return function(input){
		return input? input.replace(/</g, "&lt;").replace(/>/g, "&gt;") : "";
	};
});

// allow <br> only
app.filter("enable_br", function(){
	return function(input){
		return input? input.replace(/&lt;br\/?\ ?&gt;/g, "<br>").replace(/\n/g, "<br>") : "";
	};
});

// forcely add 'http(s)?://' infront of link, if not
app.filter("external_link", function(){
	return function(input){
		if(typeof(input) == "string") {
			return input.substr(0, 4) == "http"? input : "http://" + input;
		} else {
			return input;
		}
	};
});