TypeScript-Fluent-API/dog.ts at master · RyannosaurusRex/TypeScript-Fluent-API · GitHub

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class Dog {
    constructor() {

    }

    public Bark(): Dog {
        console.log("Bark!!");
        return this;
    }

    public Scratch(): Dog {
        return this;
    }

    public Woof(): Dog {
        return this;
    }

    public GoOnWalk(): WalkCommand {
        return new WalkCommand(this);
    }

    public GoForRun(): RunCommand {
        return new RunCommand(this);
    }
}

class WalkCommand {
    dog: Dog;
    constructor(dog: Dog) {
        this.dog = dog;
    }

    public GoToPark(): WalkCommand {
        return this;
    }
    public GoHome(): Dog {
        return this.dog;
    }
}

class RunCommand {
    dog: Dog;
    constructor(dog: Dog) {
        this.dog = dog;
    }

    public RunToPark(): RunCommand {
        return this;
    }

    public GoHome(): Dog {
        return this.dog;
    }
}

new Dog().Bark().Woof().GoForRun().RunToPark().RunToPark().GoHome().Bark();