You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
1.7 KiB
60 lines
1.7 KiB
/**
|
|
* Copyright (c) 2013-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
*
|
|
* @typechecks
|
|
*/
|
|
'use strict';
|
|
|
|
var invariant = require("./invariant");
|
|
|
|
/**
|
|
* Constructs an enumeration with keys equal to their value. If the value is an
|
|
* object, the method is run recursively, including the parent key as a suffix.
|
|
* An optional prefix can be provided that will be prepended to each value, but
|
|
* note that if a prefix is provided, the types the values of the object are
|
|
* just strings, not string literals.
|
|
*
|
|
* For example:
|
|
*
|
|
* var ACTIONS = keyMirror({FOO: '', BAR: { BAZ: '', BOZ: '' }}});
|
|
* ACTIONS.BAR.BAZ = 'BAR.BAZ';
|
|
*
|
|
* Input: {key1: '', key2: { nested1: '', nested2: '' }}}
|
|
* Output: {key1: key1, key2: { nested1: nested1, nested2: nested2 }}}
|
|
*
|
|
* var CONSTANTS = keyMirror({FOO: {BAR: ''}}, 'NameSpace');
|
|
* console.log(CONSTANTS.FOO.BAR); // NameSpace.FOO.BAR
|
|
*/
|
|
var keyMirrorRecursive = function keyMirrorRecursive(obj, prefix) {
|
|
var ret = {};
|
|
!isObject(obj) ? process.env.NODE_ENV !== "production" ? invariant(false, 'keyMirrorRecursive(...): Argument must be an object.') : invariant(false) : void 0;
|
|
|
|
for (var key in obj) {
|
|
if (!obj.hasOwnProperty(key)) {
|
|
continue;
|
|
}
|
|
|
|
var val = obj[key];
|
|
var newPrefix = prefix != null && Boolean(prefix) ? prefix + '.' + key : key;
|
|
|
|
if (isObject(val)) {
|
|
val = keyMirrorRecursive(val, newPrefix);
|
|
} else {
|
|
val = newPrefix;
|
|
}
|
|
|
|
ret[key] = val;
|
|
}
|
|
|
|
return ret;
|
|
};
|
|
|
|
function isObject(obj) {
|
|
return obj instanceof Object && !Array.isArray(obj);
|
|
}
|
|
|
|
module.exports = keyMirrorRecursive; |