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/**
* Enum
* @exports
* @class Enum
*/
export default class Enum {
/**
* Creates an instance of EnumBase.
*
* @param {...string|object} ... - enum keys
* @memberOf Enum
*/
constructor() {
const items = [...arguments];
let allKeys = [];
let reverseMap = new Map();
for(const item of items) {
if(typeof(item) === 'string') {
Object.defineProperty(this, item, {
enumerable: true,
value: item,
writable: false
});
allKeys.push(item);
reverseMap.set(item, item);
} else if(typeof(item) === 'object') {
for(const key of Object.keys(item)) {
Object.defineProperty(this, key, {
enumerable: true,
value: item[key],
writable: false
});
allKeys.push(key);
reverseMap.set(item[key], key);
}
} else {
throw new Error('Unsupported argument type: ' + typeof(item));
}
}
Object.defineProperty(this, 'allKeys', {
enumerable: false,
value: allKeys,
writable: false
});
Object.defineProperty(this, 'reverseMap', {
enumerable: false,
value: reverseMap,
writable: false
});
Object.freeze(this);
}
/**
* Check if key is registered in this enum
*
* @param {string} key
* @returns {bool}
*
* @memberOf Enum
*/
isValid(key) {
return this.allKeys.includes(key);
}
/**
* Return key for value
*
* @param {any} value
* @returns {any|undefined} returns undefined if key is not found
*
* @memberOf Enum
*/
reverse(value) {
return this.reverseMap.get(value);
}
}
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