Created
July 31, 2015 20:10
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Wrap a Firebase Query to include a toString with the parameters.
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| // Not all API methods are implemented in this proof | |
| // See https://www.firebase.com/docs/web/api/query/ | |
| var FirebaseQueryWrapper = (function() { | |
| function FirebaseQueryWrapper(url) { | |
| this.ref = new Firebase(url); | |
| this.parms = {}; | |
| } | |
| var proto = FirebaseQueryWrapper.prototype; | |
| proto.on = function() { | |
| return this.ref.on.apply(this.ref, arguments); | |
| }; | |
| proto.once = function() { | |
| return this.ref.once.apply(this.ref, arguments); | |
| }; | |
| proto.toString = function() { | |
| var args = getArgsList(this.parms); | |
| return this.ref.toString() + (args.length? '?' + args.join('&') : ''); | |
| }; | |
| proto.orderByChild = meta('orderByChild'); | |
| proto.orderByPriority = meta('orderByPriority'); | |
| proto.orderByKey = meta('orderByKey'); | |
| proto.orderByValue = meta('orderByValue'); | |
| proto.limitToFirst = meta('limitToFirst'); | |
| proto.limitToLast = meta('limitToLast'); | |
| proto.startAt = meta('startAt'); | |
| proto.endAt = meta('endAt'); | |
| proto.equalTo = meta('equalTo'); | |
| function meta(name) { | |
| return function(x) { | |
| this.ref = this.ref[name](x); | |
| this.parms[name] = x; | |
| return this; | |
| } | |
| } | |
| function getArgsList(parms) { | |
| var args = []; | |
| for(var key in parms) { | |
| if( parms.hasOwnProperty(key) ) { | |
| args.push(key + '=' + encodeURIComponent(parms[key])); | |
| } | |
| } | |
| return args; | |
| } | |
| return FirebaseQueryWrapper; | |
| })(); |
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| <!DOCTYPE html> | |
| <html> | |
| <head lang="en"> | |
| <meta charset="UTF-8"> | |
| <title>Muck Around</title> | |
| <script type="text/javascript" src="http://code.jquery.com/jquery-2.1.1.min.js"></script> | |
| <script type="text/javascript" src="https://cdn.firebase.com/js/client/2.2.9/firebase.js"></script> | |
| <script type="text/javascript" src="tmp.js"></script> | |
| <script type="text/javascript"> | |
| var query = new FirebaseQueryWrapper('https://kato-books.firebaseio.com/') | |
| .orderByChild('date').limitToFirst(5); | |
| console.log(query.toString()); | |
| query.on('value', function(snap) { | |
| console.log(snap.val()); | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <p>Open the JavaScript console.</p> | |
| </body> | |
| </html> |
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