Created
June 21, 2017 04:59
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JS object differ
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var deepDiffMapper = function() { | |
return { | |
VALUE_CREATED: 'created', | |
VALUE_UPDATED: 'updated', | |
VALUE_DELETED: 'deleted', | |
VALUE_UNCHANGED: 'unchanged', | |
map: function(obj1, obj2) { | |
if (this.isFunction(obj1) || this.isFunction(obj2)) { | |
throw 'Invalid argument. Function given, object expected.'; | |
} | |
if (this.isValue(obj1) || this.isValue(obj2)) { | |
return { | |
type: this.compareValues(obj1, obj2), | |
data: (obj1 === undefined) ? obj2 : obj1 | |
}; | |
} | |
var diff = {}; | |
for (var key in obj1) { | |
if (this.isFunction(obj1[key])) { | |
continue; | |
} | |
var value2 = undefined; | |
if ('undefined' != typeof(obj2[key])) { | |
value2 = obj2[key]; | |
} | |
diff[key] = this.map(obj1[key], value2); | |
} | |
for (var key in obj2) { | |
if (this.isFunction(obj2[key]) || ('undefined' != typeof(diff[key]))) { | |
continue; | |
} | |
diff[key] = this.map(undefined, obj2[key]); | |
} | |
return diff; | |
}, | |
compareValues: function(value1, value2) { | |
if (value1 === value2) { | |
return this.VALUE_UNCHANGED; | |
} | |
if (this.isDate(value1) && this.isDate(value2) && value1.getTime() === value2.getTime()) { | |
return this.VALUE_UNCHANGED; | |
} | |
if ('undefined' == typeof(value1)) { | |
return this.VALUE_CREATED; | |
} | |
if ('undefined' == typeof(value2)) { | |
return this.VALUE_DELETED; | |
} | |
return this.VALUE_UPDATED; | |
}, | |
isFunction: function(obj) { | |
return {}.toString.apply(obj) === '[object Function]'; | |
}, | |
isArray: function(obj) { | |
return {}.toString.apply(obj) === '[object Array]'; | |
}, | |
isDate: function(obj) { | |
return {}.toString.apply(obj) === '[object Date]'; | |
}, | |
isObject: function(obj) { | |
return {}.toString.apply(obj) === '[object Object]'; | |
}, | |
isValue: function(obj) { | |
return !this.isObject(obj) && !this.isArray(obj); | |
} | |
} | |
}(); | |
var result = deepDiffMapper.map({ | |
a:'i am unchanged', | |
b:'i am deleted', | |
e:{ a: 1,b:false, c: null}, | |
f: [1,{a: 'same',b:[{a:'same'},{d: 'delete'}]}], | |
g: new Date('2017.11.25') | |
}, | |
{ | |
a:'i am unchanged', | |
c:'i am created', | |
e:{ a: '1', b: '', d:'created'}, | |
f: [{a: 'same',b:[{a:'same'},{c: 'create'}]},1], | |
g: new Date('2017.11.25') | |
}); | |
console.log(result); |
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