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var Class = require('./Class');
var safeSet = require('./safeSet');
var safeGet = require('./safeGet');
var map = require('./map');
var filter = require('./filter');
var isFn = require('./isFn');
var safeDel = require('./safeDel');
var toArr = require('./toArr');
var each = require('./each');
exports = Class({
className: 'JsonTransformer',
initialize: function(data) {
this._data = data || {};
},
set: function(key, val) {
if (arguments.length === 1) {
this._data = key;
return this;
}
safeSet(this._data, key, val);
return this;
},
get: function(key) {
if (key == null) return this._data;
return safeGet(this._data, key);
},
map: function(from, to, fn) {
if (isFn(from)) return this.set(map(this._data, from, this));
if (isFn(to)) {
fn = to;
to = from;
}
return this.set(to, map(this.get(from), fn, this));
},
filter: function(from, to, fn) {
if (isFn(from)) return this.set(filter(this._data, from, this));
if (isFn(to)) {
fn = to;
to = from;
}
return this.set(to, filter(this.get(from), fn, this));
},
remove: function(keys) {
keys = toArr(keys);
var data = this._data;
each(keys, function(key) {
safeDel(data, key);
});
return this;
},
compute: function(from, to, fn) {
if (isFn(from)) return this.set(from.call(this, this._data));
if (isFn(to)) return this.set(from, to.call(this, this.get(from)));
from = map(
toArr(from),
function(key) {
return safeGet(this._data, key);
},
this
);
return this.set(to, fn.apply(this, from));
},
toString: function() {
return JSON.stringify(this._data);
}
});
module.exports = exports;