60 lines
1.7 KiB
JavaScript
60 lines
1.7 KiB
JavaScript
var assert = require('./assert');
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var isTypeName = require('./isTypeName');
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var forbidNewOperator = require('./forbidNewOperator');
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var isNumber = require('./isNumber');
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var isString = require('./isString');
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var isObject = require('./isObject');
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function getDefaultName(map) {
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return Object.keys(map).map(function (k) { return assert.stringify(k); }).join(' | ');
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}
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function enums(map, name) {
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if (process.env.NODE_ENV !== 'production') {
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assert(isObject(map), function () { return 'Invalid argument map ' + assert.stringify(map) + ' supplied to enums(map, [name]) combinator (expected a dictionary of String -> String | Number)'; });
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assert(isTypeName(name), function () { return 'Invalid argument name ' + assert.stringify(name) + ' supplied to enums(map, [name]) combinator (expected a string)'; });
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}
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var displayName = name || getDefaultName(map);
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function Enums(value, path) {
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if (process.env.NODE_ENV !== 'production') {
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forbidNewOperator(this, Enums);
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path = path || [displayName];
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assert(Enums.is(value), function () { return 'Invalid value ' + assert.stringify(value) + ' supplied to ' + path.join('/') + ' (expected one of ' + assert.stringify(Object.keys(map)) + ')'; });
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}
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return value;
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}
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Enums.meta = {
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kind: 'enums',
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map: map,
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name: name,
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identity: true
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};
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Enums.displayName = displayName;
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Enums.is = function (x) {
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return (isString(x) || isNumber(x)) && map.hasOwnProperty(x);
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};
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return Enums;
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}
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enums.of = function (keys, name) {
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keys = isString(keys) ? keys.split(' ') : keys;
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var value = {};
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keys.forEach(function (k) {
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value[k] = k;
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});
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return enums(value, name);
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};
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enums.getDefaultName = getDefaultName;
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module.exports = enums;
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