Oop exercise (#416)

* OOP_exercise task

* delete comment

* Friends list is a list of objects refs

* delete comments

* New Perspective on the Task

* Tried to make a woman and a cat friends;
Changed the default parameter settings;
Removed the static method of creating world in a inhabitant;

* Made method introduceYourSelf DRY;
Fixed bug with adding friends.

* Correcting strong tag

submissions/OlexiyDobroskok/OOP_exercise/index.js

@@ -0,0 +1,146 @@
+/* Refer to https://github.com/OleksiyRudenko/a-tiny-JS-world for the task details
+   Complete the below for code reviewers' convenience:
+
+   Code repository: https://github.com/OlexiyDobroskok/a-tiny-JS-world
+   Web app: https://olexiydobroskok.github.io/a-tiny-JS-world/
+   */
+
+// ======== OBJECTS DEFINITIONS ========
+class Inhabitant {
+  constructor({
+    species = "No species",
+    name = "No name",
+    gender = "No gender",
+    saying = "Hello",
+    friends = [],
+  }) {
+    this.species = species;
+    this.name = name;
+    this.gender = gender;
+    this.saying = saying;
+    this.friends = friends;
+  }
+
+  addFriend(person) {
+    this.friends.push(person);
+  }
+
+  introduceYourSelf() {
+    const template = `<strong>${this.saying}! My name is ${this.name}. Species: ${this.species}. Gender: ${this.gender}.</strong>`;
+    if (this.friends.length !== 0) {
+      const friendsName = this.friends.map((friend) => friend.name).join(", ");
+      return template + `<strong>Friends: ${friendsName}.</strong>`;
+    }
+    return template + `<strong>Friends: Looking for friends!</strong>`;
+  }
+}
+
+class Human extends Inhabitant {
+  constructor({ name, gender, saying, legs = 2, hands = 2, friends }) {
+    super({ species: "human", name, gender, saying, friends });
+    this.hands = hands;
+    this.legs = legs;
+  }
+  introduceYourSelf() {
+    return (
+      super.introduceYourSelf() +
+      `<strong>I have ${this.hands} hands and ${this.legs} legs!</strong>`
+    );
+  }
+}
+
+class Man extends Human {
+  constructor({ name, saying, friends, legs, hands }) {
+    super({ name, gender: "male", saying, legs, hands, friends });
+  }
+}
+
+class Woman extends Human {
+  constructor({ name, saying, friends, legs, hands }) {
+    super({ name, gender: "female", saying, legs, hands, friends });
+  }
+}
+
+class Pets extends Inhabitant {
+  constructor({ species, name, gender, paws = 4, saying, friends }) {
+    super({ species, name, gender, saying, friends });
+    this.paws = paws;
+  }
+  introduceYourSelf() {
+    return (
+      super.introduceYourSelf() + `<strong>I have ${this.paws} paws!</strong>`
+    );
+  }
+}
+
+class Cat extends Pets {
+  static meow;
+  constructor({ name, gender, saying = "¡miau miau", friends, paws }) {
+    super({
+      species: "cat",
+      name,
+      gender,
+      saying,
+      paws,
+      friends,
+    });
+    Cat.meow = saying;
+    this.saying = Cat.getMeow();
+  }
+  static getMeow() {
+    return this.meow;
+  }
+}
+
+class Dog extends Pets {
+  static bark;
+  constructor({ name, gender, saying = "¡guau guau", friends, paws }) {
+    super({
+      species: "dog",
+      name,
+      gender,
+      saying,
+      paws,
+      friends,
+    });
+    Dog.bark = this.saying;
+  }
+}
+
+class CatWoman extends Woman {
+  constructor({ name, saying = "", friends, legs, hands }) {
+    super({ name, saying, friends, legs, hands });
+    this.saying = Cat.getMeow() + " " + saying;
+  }
+}
+
+const manJose = new Man({ name: "José", saying: "Hola, amigo" });
+const womanMartina = new Woman({ name: "Martina", saying: "Buenos días" });
+const catLalo = new Cat({ name: "Lalo", gender: "female" });
+const dogPako = new Dog({ name: "Pako", gender: "male" });
+const catwomanNerea = new CatWoman({ name: "Nerea", saying: "muchachos" });
+
+manJose.addFriend(catwomanNerea);
+womanMartina.addFriend(dogPako);
+catwomanNerea.addFriend(catLalo);
+catwomanNerea.addFriend(manJose);
+
+const worldPopulation = [
+  manJose,
+  womanMartina,
+  catLalo,
+  dogPako,
+  catwomanNerea,
+];
+
+function showWorldPopulation() {
+  const inhabitantNames = worldPopulation.map((inhabitant) => inhabitant.name);
+  print(
+    `<strong>Population: ${worldPopulation.length} inhabitants! It is: ${inhabitantNames}</strong>`
+  );
+  worldPopulation.forEach((inhabitant) =>
+    print(inhabitant.introduceYourSelf())
+  );
+}
+
+showWorldPopulation();