111 lines
5.1 KiB
JavaScript
111 lines
5.1 KiB
JavaScript
/**
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* Copyright 2013-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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/* global hasOwnProperty:true */
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'use strict';
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var _prodInvariant = require('./reactProdInvariant'),
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_assign = require('object-assign');
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var invariant = require('fbjs/lib/invariant');
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var hasOwnProperty = {}.hasOwnProperty;
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function shallowCopy(x) {
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if (Array.isArray(x)) {
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return x.concat();
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} else if (x && typeof x === 'object') {
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return _assign(new x.constructor(), x);
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} else {
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return x;
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}
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}
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var COMMAND_PUSH = '$push';
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var COMMAND_UNSHIFT = '$unshift';
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var COMMAND_SPLICE = '$splice';
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var COMMAND_SET = '$set';
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var COMMAND_MERGE = '$merge';
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var COMMAND_APPLY = '$apply';
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var ALL_COMMANDS_LIST = [COMMAND_PUSH, COMMAND_UNSHIFT, COMMAND_SPLICE, COMMAND_SET, COMMAND_MERGE, COMMAND_APPLY];
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var ALL_COMMANDS_SET = {};
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ALL_COMMANDS_LIST.forEach(function (command) {
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ALL_COMMANDS_SET[command] = true;
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});
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function invariantArrayCase(value, spec, command) {
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!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;
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var specValue = spec[command];
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!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;
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}
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/**
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* Returns a updated shallow copy of an object without mutating the original.
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* See https://facebook.github.io/react/docs/update.html for details.
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*/
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function update(value, spec) {
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!(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;
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if (hasOwnProperty.call(spec, COMMAND_SET)) {
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!(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;
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return spec[COMMAND_SET];
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}
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var nextValue = shallowCopy(value);
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if (hasOwnProperty.call(spec, COMMAND_MERGE)) {
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var mergeObj = spec[COMMAND_MERGE];
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!(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;
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!(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;
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_assign(nextValue, spec[COMMAND_MERGE]);
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}
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if (hasOwnProperty.call(spec, COMMAND_PUSH)) {
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invariantArrayCase(value, spec, COMMAND_PUSH);
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spec[COMMAND_PUSH].forEach(function (item) {
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nextValue.push(item);
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});
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}
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if (hasOwnProperty.call(spec, COMMAND_UNSHIFT)) {
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invariantArrayCase(value, spec, COMMAND_UNSHIFT);
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spec[COMMAND_UNSHIFT].forEach(function (item) {
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nextValue.unshift(item);
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});
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}
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if (hasOwnProperty.call(spec, COMMAND_SPLICE)) {
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!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;
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!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;
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spec[COMMAND_SPLICE].forEach(function (args) {
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!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;
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nextValue.splice.apply(nextValue, args);
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});
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}
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if (hasOwnProperty.call(spec, COMMAND_APPLY)) {
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!(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;
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nextValue = spec[COMMAND_APPLY](nextValue);
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}
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for (var k in spec) {
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if (!(ALL_COMMANDS_SET.hasOwnProperty(k) && ALL_COMMANDS_SET[k])) {
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nextValue[k] = update(value[k], spec[k]);
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}
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}
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return nextValue;
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}
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module.exports = update; |