PromiseClass

Create your own chain Promise Class easily.

Features

1. All method will warp to chain Promise
2. Support constructor define
3. Support property define
4. Support sync & async method define
5. Support addMethod & addPropertie after class define
6. Support generator & ES7 await
7. Support async callback & promise & generator mix use
8. Supoort define generator method, and promise callback support generator function
9. Support chai

Quick start

Try it:

var PromiseClass = require('promiseclass');
var co = require('co');

var App = PromiseClass.create({

    constructor(str){
        console.log('constructor:',str);
    },

    syncMethod(n){
        console.log('syncMethod called : '+n);
        return 'syncMethod return : '+n;
    },

    asyncMethod1(n, done){
        console.log('asyncMethod1 called : '+n);
        this.asyncMethod2(n).then(function(){
            console.log('asyncMethod1 done : '+n);
            done(null, 'asyncMethod1 return : '+n);
        }).catch(done);
    },

    asyncMethod2(n, done){
        console.log('asyncMethod2 called : '+n);
        setTimeout(function(){
            console.log('asyncMethod2 done : '+n);
            done(null, 'asyncMethod2 return : '+n);
        }, n);
    },

    *generatorMethod1(n){
        console.log('generatorMethod1 called : '+n);
        return yield this.asyncMethod2(n);
    },

    propertie1: 1,
    propertie2: 2

});

// add async method
App.addMethod('asyncMethod3', function(n, done){
    console.log('asyncMethod3 called : '+n);
    setTimeout(function(){
        console.log('asyncMethod3 done : '+n);
        done(null, 'asyncMethod3 return : '+ n);
    }, n);
});
// add generator method
App.addMethod('generatorMethod2', function*(n){
    console.log('generatorMethod2 called : '+n);
    return yield this.asyncMethod2(n);
});
// add propertie
App.addPropertie('propertie3', 3);

// async callback
function async(){
    console.log('================ async start ================');
    var deferred = Promise.defer();
    var app = new App('async');
    app.syncMethod(0, function(error, ret){
        console.log(ret);
        console.log('--------------------------');
        app.asyncMethod1(1, function(error, ret){
            console.log(ret);
            console.log('================ async end ================');
            console.log('');
            deferred.resolve();
        });
    });
    return deferred.promise;
}

// promise
function promise(){
    console.log('================ promise start ================');
    var deferred = Promise.defer();
    var app = new App('promise');
    app.syncMethod(0).then(function(ret){
        console.log(ret);
        console.log('--------------------------');
    }).asyncMethod1(1).then(function(ret){
        console.log(ret);
        console.log('--------------------------');
    }).asyncMethod2(2).then(function(ret){
        console.log(ret);
        console.log('--------------------------');
    }).asyncMethod3(3).then(function(ret){
        console.log(ret);
        console.log('================ promise end ================');
        console.log('');
        deferred.resolve();
    });
    return deferred.promise;
}

// generator
function generator(){
    console.log('================ generator start ================');
    var deferred = Promise.defer();
    co(function *(){
        var app = new App('generator');
        yield app.syncMethod(0).then(function(ret){
            console.log(ret);
        });
        console.log('--------------------------');
        yield app.asyncMethod1(1).then(function(ret){
            console.log(ret);
        });
        console.log('--------------------------');
        yield app.asyncMethod2(2).then(function(ret){
            console.log(ret);
        });
        console.log('--------------------------');
        yield app.asyncMethod3(3).then(function(ret){
            console.log(ret);
        });
        console.log('--------------------------');
        yield app.generatorMethod1(4).then(function*(ret){
            console.log(ret);
            return yield this.asyncMethod1(5);
        }).then(function(ret){
            console.log(ret);
        });
    }).then(function(){
        console.log('done!');
        console.log('================ generator end ================');
        console.log('');
        deferred.resolve();
    });
    return deferred.promise;
}

async().then(function(){
    return promise();
}).then(function(){
    return generator();
});

Try chai

var PromiseClass = require('promiseclass');
var chai = require("chai");
chai.should();
chai.use(PromiseClass.chaiSupportChainPromise);

var App = PromiseClass.create({
    asyncMethod(n, done){
        setTimeout(function(){
            done(null, n);
        }, n);
    },
});

var app = new App();

describe('chai test', function(){
    it('test', function(){
        return app.asyncMethod(100).should.equal(100)
        .asyncMethod(88).should.equal(88);
    });
});

License

PromiseClass is released under the MIT license:

The MIT License

Copyright (c) 2015-2016 Yanis Wang < [email protected] >

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.

Thanks

• mocha: https://github.com/visionmedia/mocha
• chai: https://github.com/chaijs/chai
• istanbul: https://github.com/gotwarlost/istanbul
• Grunt: http://gruntjs.com/
• jshint: https://github.com/jshint/jshint
• GitHub: https://github.com/