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/**
* Stores an object and it's public methods
*/
class InterfaceAccessor {
/**
* Creates new accessor for object with publicMethods being exposed
* @param {object} object
* @param {array<String>} publicMethods
*/
constructor(object, publicMethods) {
this.object = object;
this.publicMethods = publicMethods;
}
/**
* Executes method if it is a public method
* @param {string} method Name of method to call
* @return {number} 0 success, 1 method not public, 2 method not found
*/
execute(method, ...args) {
if (!this.publicMethods.includes(method)) return 1;
if (typeof this.object[method] != 'function') return 2;
this.object[method](...args);
return 0;
}
}
/**
* Implements communication between objects
*/
export default class Interface {
/**
* Initializes interface
*/
constructor() {
this.objects = {};
}
/**
* Adds a new object to array at objKey and assigns public methods
* @param {object} object Object to reference in Interface
* @param {String} objKey Key to reference the object under
* @param {Array} publicMethods Names of public methods
*/
addObject(object, objKey, publicMethods) {
if (!this.objects[objKey]) this.objects[objKey] = [];
this.objects[objKey].push(new InterfaceAccessor(object, publicMethods));
}
/**
* Unregisters object
* @param {Object} object
* @param {String} objKey
*/
removeObject(object, objKey) {
if (!this.objects[objKey]) return;
// Remove all instances of object from objKey
objects[objKey] = objects[objKey].filter(elt => elt.object != object);
// Remove reference, if none remain
if (objects[objKey].length == 0) objects[objKey] = undefined;
}
/**
* Calls a method on all objects with the key objKey
* @param {String} objKey Object Key of objects to call method on
* @param {String} method Method name to call on the objects
* @param {...*} args Arguments to pass
* @return {number} 0 Success, 1 no objects with objKey, 2 method not public
*/
callMethod(objKey, method, ...args) {
if (!this.objects[objKey]) return 1;
let returnCode = 0;
for (let obj of this.objects[objKey]) {
if (obj.execute(method, ...args) != 0) returnCode = 2;
}
return returnCode;
}
}
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