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/**
* Copyright 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
*/
/* global hasOwnProperty:true */
'use strict';
var _prodInvariant = require('./reactProdInvariant'),
_assign = require('object-assign');
var invariant = require('fbjs/lib/invariant');
var hasOwnProperty = {}.hasOwnProperty;
function shallowCopy(x) {
if (Array.isArray(x)) {
return x.concat();
} else if (x && typeof x === 'object') {
return _assign(new x.constructor(), x);
} else {
return x;
}
}
var COMMAND_PUSH = '$push';
var COMMAND_UNSHIFT = '$unshift';
var COMMAND_SPLICE = '$splice';
var COMMAND_SET = '$set';
var COMMAND_MERGE = '$merge';
var COMMAND_APPLY = '$apply';
var ALL_COMMANDS_LIST = [COMMAND_PUSH, COMMAND_UNSHIFT, COMMAND_SPLICE, COMMAND_SET, COMMAND_MERGE, COMMAND_APPLY];
var ALL_COMMANDS_SET = {};
ALL_COMMANDS_LIST.forEach(function (command) {
ALL_COMMANDS_SET[command] = true;
});
function invariantArrayCase(value, spec, command) {
!Array.isArray(value) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'update(): expected target of %s to be an array; got %s.', command, value) : _prodInvariant('1', command, value) : void 0;
var specValue = spec[command];
!Array.isArray(specValue) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'update(): expected spec of %s to be an array; got %s. Did you forget to wrap your parameter in an array?', command, specValue) : _prodInvariant('2', command, specValue) : void 0;
}
/**
* Returns a updated shallow copy of an object without mutating the original.
* See https://facebook.github.io/react/docs/update.html for details.
*/
function update(value, spec) {
!(typeof spec === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'update(): You provided a key path to update() that did not contain one of %s. Did you forget to include {%s: ...}?', ALL_COMMANDS_LIST.join(', '), COMMAND_SET) : _prodInvariant('3', ALL_COMMANDS_LIST.join(', '), COMMAND_SET) : void 0;
if (hasOwnProperty.call(spec, COMMAND_SET)) {
!(Object.keys(spec).length === 1) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Cannot have more than one key in an object with %s', COMMAND_SET) : _prodInvariant('4', COMMAND_SET) : void 0;
return spec[COMMAND_SET];
}
var nextValue = shallowCopy(value);
if (hasOwnProperty.call(spec, COMMAND_MERGE)) {
var mergeObj = spec[COMMAND_MERGE];
!(mergeObj && typeof mergeObj === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'update(): %s expects a spec of type \'object\'; got %s', COMMAND_MERGE, mergeObj) : _prodInvariant('5', COMMAND_MERGE, mergeObj) : void 0;
!(nextValue && typeof nextValue === 'object') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'update(): %s expects a target of type \'object\'; got %s', COMMAND_MERGE, nextValue) : _prodInvariant('6', COMMAND_MERGE, nextValue) : void 0;
_assign(nextValue, spec[COMMAND_MERGE]);
}
if (hasOwnProperty.call(spec, COMMAND_PUSH)) {
invariantArrayCase(value, spec, COMMAND_PUSH);
spec[COMMAND_PUSH].forEach(function (item) {
nextValue.push(item);
});
}
if (hasOwnProperty.call(spec, COMMAND_UNSHIFT)) {
invariantArrayCase(value, spec, COMMAND_UNSHIFT);
spec[COMMAND_UNSHIFT].forEach(function (item) {
nextValue.unshift(item);
});
}
if (hasOwnProperty.call(spec, COMMAND_SPLICE)) {
!Array.isArray(value) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'Expected %s target to be an array; got %s', COMMAND_SPLICE, value) : _prodInvariant('7', COMMAND_SPLICE, value) : void 0;
!Array.isArray(spec[COMMAND_SPLICE]) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'update(): expected spec of %s to be an array of arrays; got %s. Did you forget to wrap your parameters in an array?', COMMAND_SPLICE, spec[COMMAND_SPLICE]) : _prodInvariant('8', COMMAND_SPLICE, spec[COMMAND_SPLICE]) : void 0;
spec[COMMAND_SPLICE].forEach(function (args) {
!Array.isArray(args) ? process.env.NODE_ENV !== 'production' ? invariant(false, 'update(): expected spec of %s to be an array of arrays; got %s. Did you forget to wrap your parameters in an array?', COMMAND_SPLICE, spec[COMMAND_SPLICE]) : _prodInvariant('8', COMMAND_SPLICE, spec[COMMAND_SPLICE]) : void 0;
nextValue.splice.apply(nextValue, args);
});
}
if (hasOwnProperty.call(spec, COMMAND_APPLY)) {
!(typeof spec[COMMAND_APPLY] === 'function') ? process.env.NODE_ENV !== 'production' ? invariant(false, 'update(): expected spec of %s to be a function; got %s.', COMMAND_APPLY, spec[COMMAND_APPLY]) : _prodInvariant('9', COMMAND_APPLY, spec[COMMAND_APPLY]) : void 0;
nextValue = spec[COMMAND_APPLY](nextValue);
}
for (var k in spec) {
if (!(ALL_COMMANDS_SET.hasOwnProperty(k) && ALL_COMMANDS_SET[k])) {
nextValue[k] = update(value[k], spec[k]);
}
}
return nextValue;
}
module.exports = update;
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