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export class Resolver {
constructor(factory) {
this.factory = factory;
}
resolveWith(container) {
if (this.isConstructor()) {
return this.resolveDependenciesUsing(container);
}
else {
return this.factory(container);
}
}
parseConstructor(func) {
let code = func.toString();
let regex = /function ([a-zA-Z]*)\((.*)\) *\{/;
return code.match(regex);
}
isConstructor() {
return this.parseConstructor(this.factory)[1] != '';
}
resolveDependenciesUsing(container) {
let parameters = this.parseConstructor(this.factory).slice(2)[0].split(',').filter(Boolean);
let dependencies = parameters.map((parameter) => container.resolve(parameter));
return new this.factory(...dependencies);
}
}
export class Registration {
constructor(key, factory) {
this.key = key;
this.factory = factory;
}
create(container) {
return new Resolver(this.factory).resolveWith(container);
}
asSingleton() {
let originalFactory = this.factory;
let item = null;
this.factory = (container) => {
if (item == null) {
item = new Resolver(originalFactory).resolveWith(container);
}
return item;
};
}
}
export default class Registry {
constructor() {
this.registrations = {};
}
register(key, factory) {
if (this.registrations[key] == undefined) {
this.registrations[key] = [];
}
let registration = new Registration(key, factory);
this.registrations[key].push(registration);
return registration;
}
resolve(key) {
try {
return this.registrations[key][0].create(this);
} catch(error) {
console.error(`ERROR: Could Not Resolve ${key}`);
console.error(error);
throw error;
}
}
resolveAll(key) {
return this.registrations[key].map(registration => registration.create(this));
}
}
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