cookie adaptor for fallback on older mobile browsers

ahaedike · Dec 3, 2009 · 4944e4a · 4944e4a
1 parent e0cfc4f
commit 4944e4a
Show file tree

Hide file tree

Showing 3 changed files with 115 additions and 1 deletion.
diff --git a/spec/cookie.html b/spec/cookie.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+<head>
+	<title>Lawnchair Spec</title>
+	<link rel="stylesheet" href="shoulda.css" type="text/css" media="screen" title="no title" charset="utf-8">
+
+	<script src="qunit.js" type="text/javascript" charset="utf-8"></script>
+	<script src="shoulda.js" type="text/javascript" charset="utf-8"></script>
+
+	<script src="../src/adaptors/Helpers.js" type="text/javascript" charset="utf-8"></script>
+	<script src="../src/adaptors/CookieAdaptor.js" type="text/javascript" charset="utf-8"></script>
+	<script src="../src/lawnchair.js" type="text/javascript" charset="utf-8"></script>
+
+	<script type="text/javascript" charset="utf-8">
+		var	store = new Lawnchair({adaptor:'cookie'});
+	</script>
+	<script src="lawnchair-spec.js" type="text/javascript" charset="utf-8"></script>
+
+</head>
+<body>
+	<h2 id="qunit-banner">Lawnchair Spec</h2>
+	<h2 id="qunit-userAgent"></h2>
+	<ol id="qunit-tests"></ol>
+</body>
+</html>
diff --git a/src/adaptors/CookieAdaptor.js b/src/adaptors/CookieAdaptor.js
@@ -0,0 +1,88 @@
+/**
+ * CookieAdaptor
+ * ===================
+ * Cookie implementation for Lawnchair for older browsers.
+ * 
+ * Based on ppk's http://www.quirksmode.org/js/cookies.html
+ *
+ */
+var CookieAdaptor = function(options) {
+    for (var i in LawnchairAdaptorHelpers) {
+        this[i] = LawnchairAdaptorHelpers[i];
+    }
+    this.init(options);
+};
+
+CookieAdaptor.prototype = {
+	init:function(){
+		this.createCookie = function(name, value, days) {
+			if (days) {
+				var date = new Date();
+				date.setTime(date.getTime()+(days*24*60*60*1000));
+				var expires = "; expires="+date.toGMTString();
+			}
+			else var expires = "";
+			document.cookie = name+"="+value+expires+"; path=/";
+		};
+	},
+	get:function(key, callback){
+		var readCookie = function(name) {
+			var nameEQ = name + "=";
+			var ca = document.cookie.split(';');
+			var len = ca.length;
+			for (var i=0; i < len; i++) {
+				var c = ca[i];
+				while (c.charAt(0)==' ') c = c.substring(1,c.length);
+				if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
+			}
+			return null;
+		};
+		var obj = this.deserialize(readCookie(key));
+        if (obj) {
+            obj.key = key;
+            if (callback)
+                callback(obj);
+        }
+	},
+	save:function(obj, callback){
+		var id = obj.key || this.uuid();
+        delete obj.key;
+		this.createCookie(id, this.serialize(obj), 365);
+		if (callback)
+            callback(obj);
+	},
+	all:function(callback){
+		var cb = this.terseToVerboseCallback(callback);
+		var ca = document.cookie.split(';');
+
+		var len = ca.length;
+		var yar = [];
+		var c,k,v,o;
+		// yo ho yo ho a pirates life for me
+		for (var i = 0; i < len; i++) {
+			c = ca[i].split('=');
+			k = c[0];
+			v = c[1];
+			o = this.deserialize(v)
+			if (o) {
+				o.key = k;
+				yar.push(o);
+			}
+		}
+		if (cb)
+            cb(yar);
+	},
+	remove:function(keyOrObj) {
+		var key = (typeof keyOrObj == 'string') ? keyOrObj : keyOrObj.key;
+		this.createCookie(key, '', -1);
+	}, 
+	nuke:function() {
+		var that = this;
+		this.all(function(r){
+			var l = r.length;
+			for (var i = 0; i < l; i++) {
+				that.remove(r[i].key)
+			}
+		});
+	}
+};
diff --git a/src/lawnchair.js b/src/lawnchair.js
@@ -14,7 +14,8 @@ Lawnchair.prototype = {
 		var adaptors = {
 			'webkit':window.WebkitSQLiteAdaptor,
 			'gears':window.GearsSQLiteAdaptor,
-			'dom':window.DOMStorageAdaptor
+			'dom':window.DOMStorageAdaptor,
+			'cookie':window.CookieAdaptor
 		};
 
 		this.adaptor = opts.adaptor ? new adaptors[opts.adaptor](opts) : new WebkitSQLiteAdaptor(opts);