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kami-parse-server/src/Controllers/AdaptableController.js
2016-02-21 17:04:34 -05:00

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/*
AdaptableController.js
AdaptableController is the base class for all controllers
that support adapter,
The super class takes care of creating the right instance for the adapter
based on the parameters passed
*/
const DefaultAdapters = {};
export class AdaptableController {
/**
* Check whether the api call has master key or not.
* @param {options} the adapter options
* @param {defaultAdapter} the default adapter class or object to use
* @discussion
* Supported options types:
* - string: the options will be loaded with required, when loaded, if default
* is set on the returned object, we'll use that one to support modules
* - object: a plain javascript object (options.constructor === Object), if options.adapter is set, we'll try to load it with the same mechanics.
* - function: we'll create a new instance from that function, and pass the options object
*/
constructor(options) {
let adapter;
// We have options and options have adapter key
if (options) {
// Pass an adapter as a module name, a function or an instance
if (typeof options == "string" || typeof options == "function" || options.constructor != Object) {
adapter = options;
}
if (options.adapter) {
adapter = options.adapter;
}
}
if (!adapter) {
adapter = this.defaultAdapter();
}
// This is a string, require the module
if (typeof adapter === "string") {
adapter = require(adapter);
// If it's define as a module, get the default
if (adapter.default) {
adapter = adapter.default;
}
}
// From there it's either a function or an object
// if it's an function, instanciate and pass the options
if (typeof adapter === "function") {
var Adapter = adapter;
adapter = new Adapter(options);
}
this.adapter = adapter;
this.options = options;
}
defaultAdapter() {
return DefaultAdapters[this.constructor.name];
}
// Sets the default adapter for that Class
static setDefaultAdapter(defaultAdapter) {
DefaultAdapters[this.name] = defaultAdapter;
}
}
export default AdaptableController;