Created
August 3, 2010 17:06
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| var DiffJSON = (function() { | |
| var isObject = function(obj) { | |
| return Object.prototype.toString.apply(obj) == "[object Object]"; | |
| }; | |
| var retrieve = function(nested_key) { | |
| var keys = nested_key.split("."), current_object = this; | |
| for (var i = 0; i < keys.length; i++) { current_object = current_object[keys[i]] } | |
| return current_object; | |
| }; | |
| var changed_objects = function(what) { | |
| var objs = []; | |
| for (var i=0; i < this.diff.changed[what].length; i++) { | |
| var o = this.diff.retrieve(this.diff.changed[what][i]); | |
| o.name = this.diff.changed[what][i]; | |
| objs.push(o); | |
| } | |
| return objs; | |
| }; | |
| var check = function(neue, original, namespace) { | |
| var removed = [], added = [], modified = [], all = [], result = {}; | |
| if (typeof namespace != "string") { namespace = ""; } | |
| for (var element in neue) { | |
| if (typeof original[element] == "undefined") { | |
| added.push(namespace + element); | |
| all.push(namespace + element); | |
| result[element] = { change: "+", neue: neue[element], original: undefined }; | |
| } else if (original[element] != neue[element] && !(isObject(original[element]) && isObject(neue[element]))) { | |
| modified.push(namespace + element); | |
| all.push(namespace + element); | |
| result[element] = { change: "/", neue: neue[element], original: original[element] }; | |
| } else if (isObject(original[element]) && isObject(neue[element])) { | |
| result[element] = check(neue[element], original[element], namespace+element+"."); | |
| removed = removed.concat(result[element].diff.changed.removed); | |
| added = added.concat(result[element].diff.changed.added); | |
| modified = modified.concat(result[element].diff.changed.modified); | |
| all = all.concat(result[element].diff.changed.all); | |
| delete result[element].diff; | |
| } else { | |
| result[element] = original[element]; | |
| } | |
| } | |
| for (var element in original) { | |
| if (typeof neue[element] == "undefined") { | |
| removed.push(namespace + element); | |
| all.push(namespace + element); | |
| result[element] = { change: "-", neue: undefined, original: original[element] }; | |
| } | |
| } | |
| result.diff = { | |
| changed: { removed:removed, added:added, modified:modified, all:all }, | |
| original: original, | |
| neue: neue, | |
| retrieve: function(what) { return retrieve.apply(result, [what]); } | |
| }; | |
| removed.objects = function() { return changed_objects.apply(result, ["removed"]); }; | |
| added.objects = function() { return changed_objects.apply(result, ["added"]); }; | |
| modified.objects = function() { return changed_objects.apply(result, ["modified"]); }; | |
| all.objects = function() { return changed_objects.apply(result, ["all"]); }; | |
| return result; | |
| }; | |
| return check; | |
| })(); |
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| { | |
| "name":"Nathan Herald", | |
| "age":{ | |
| "change":"/", | |
| "neue":26, | |
| "original":25 | |
| }, | |
| "pets":{ | |
| "dog":{ | |
| "name":{ | |
| "change":"+", | |
| "neue":"Fred" | |
| }, | |
| "legs":4 | |
| }, | |
| "cat":{ | |
| "change":"-", | |
| "original":{ | |
| "name":"Charles", | |
| "legs":4 | |
| } | |
| } | |
| }, | |
| "hat":{ | |
| "change":"+", | |
| "neue":{ | |
| "type":"Baseball Cap", | |
| "color":"White", | |
| "hex_color":"#eee" | |
| } | |
| }, | |
| "diff":{ | |
| "changed":{ | |
| "removed":["pets.cat"], | |
| "added":["pets.dog.name", | |
| "hat"], | |
| "modified":["age"], | |
| "all":["age", | |
| "pets.dog.name", | |
| "pets.cat", | |
| "hat"] | |
| }, | |
| "original":{ | |
| "name":"Nathan Herald", | |
| "age":25, | |
| "pets":{ | |
| "dog":{ | |
| "legs":4 | |
| }, | |
| "cat":{ | |
| "name":"Charles", | |
| "legs":4 | |
| } | |
| } | |
| }, | |
| "neue":{ | |
| "name":"Nathan Herald", | |
| "age":26, | |
| "pets":{ | |
| "dog":{ | |
| "name":"Fred", | |
| "legs":4 | |
| } | |
| }, | |
| "hat":{ | |
| "type":"Baseball Cap", | |
| "color":"White", | |
| "hex_color":"#eee" | |
| } | |
| } | |
| } | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Test of diff-json.js</title> | |
| </head> | |
| <body> | |
| <pre id="output"></pre> | |
| <script type="text/javascript" src="http://www.JSON.org/json2.js"></script> | |
| <script type="text/javascript" src="diff-json.js"></script> | |
| <script type="text/javascript"> | |
| var o = { | |
| name: "Nathan Herald", | |
| age: 25, | |
| pets: { | |
| dog: { | |
| legs: 4 | |
| }, | |
| cat: { | |
| name: "Charles", | |
| legs: 4 | |
| } | |
| } | |
| } | |
| var n = { | |
| name: "Nathan Herald", | |
| age: 26, | |
| pets: { | |
| dog: { | |
| name: "Fred", | |
| legs: 4 | |
| }, | |
| }, | |
| hat: { | |
| type: "Baseball Cap", | |
| color: "White", | |
| hex_color: "#eee" | |
| } | |
| } | |
| var test = DiffJSON(n, o); | |
| // --- This is only to prettify the result --- // | |
| var s = JSON.stringify(test).replace(/,/g, ",\n").replace(/{/g, "{\n").replace(/}/g, "\n}"); | |
| var ss = s.split("\n"); | |
| var count = 0; | |
| var new_s = ""; | |
| for (var i=0; i<ss.length; i++) { | |
| var this_ss = ss[i].replace(/^\s+|\s+$/g, ""); | |
| if (this_ss.match(/^}/)) { count--; } | |
| new_s += Array(count+1).join(" ") + this_ss + "\n"; | |
| if (this_ss.match(/{$/)) { count++; } | |
| } | |
| document.getElementById("output").innerHTML = new_s; | |
| </script> | |
| </body> | |
| </html> |
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