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Simple and Small Dependency Injection Container inspired by Pimple.
/*
* Flyspeck is Dependency Injection Container.
*
* Copyright (c) 2014 Anton Medvedev
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
class Flyspeck {
constructor() {
this.values = {};
this.factories = {};
}
set(name, callable) {
if (typeof callable === "function") {
this.factories[name] = callable;
} else {
this.values[name] = callable;
}
}
get(name) {
if (this.values[name] === undefined) {
this.values[name] = this.factories[name](this);
}
return this.values[name];
}
extend(name, callable) {
var factory = this.factories[name];
if (factory === undefined) {
throw "Factory `" + name + "` does not found.";
}
this.factories[name] = function (container) {
return callable(factory(container), container);
};
}
}
@antonmedv

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antonmedv commented Apr 28, 2014

Example usage:

var c = new Flyspeck();

c.set('one', () => {
    return 1;
});

c.set('two', (c) => {
    return 1 + c.get('one');
});

c.extend('one', (one, c) => {
    return one + 0.1;
});

c.get('two') == 2.1; // true
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antonmedv commented Apr 28, 2014

More:

var c = new Flyspeck();

c.set('name', 'GistHub');

c.set('config', {
    server: 'https://gist.github.com'
});

c.set('user', function (c) {
    return new User(c.get('name'));
});

c.extend('user', function (user, c) {
    return new ProxyUser(user);
});

c.set('app', function (c) {
    return new Application(c.get('config'), c.get('user'));
});

c.extend('app', function (app, c) {
    app.setSomething();
    return app;
});

var app = c.get('app');
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