Zelgadis87/ML.js

const a = 1 // eslint-disable-line no-unused-vars
    , defer = require( './defer' );

module.exports = function createTask( fn ) {
    if ( typeof fn !== 'function' )
        throw new Error( 'A task should be created with a function' );
    let deferred = defer();
    let task = deferred.promise.then( fn ? fn : () => {} );
    deferred.promise.task = task;
    task.execute = ( ...args ) => {
        if ( task.executed )
            throw new Error( 'Task already executed' );
        task.executed = true;
        deferred.resolve( ...args );
        return task;
    };
    task.executed = false;
    return task;
};