Pattern solutions

src/patterns/01-abstractFactory/index.js

@@ -5,18 +5,36 @@ export class ErrorNotification {}
 
 export class SuccessControl {
   create (type = '') {
-    // todo: implement logic
+    if (type === 'button') {
+      return new SuccessButton();
+    }
+
+    if (type === 'notification') {
+      return new SuccessNotification();
+    }
   }
 }
 
 export class ErrorControl {
   create (type = '') {
-    // todo: implement logic
+    if (type === 'button') {
+      return new ErrorButton();
+    }
+
+    if (type === 'notification') {
+      return new ErrorNotification();
+    }
   }
 }
 
 export default class ControlsFactory {
   getFactory (factoryType = '') {
-    // todo: implement logic
+    if (factoryType === 'success') {
+      return new SuccessControl();
+    }
+
+    if (factoryType === 'error') {
+      return new ErrorControl();
+    }
   }
 }

src/patterns/02-builder/index.js

@@ -4,14 +4,24 @@ export default class RequestBuilder {
   }
 
   addPagination (start, end) {
-    // todo: implement logic
+    this.url.searchParams.append('start', start);
+    this.url.searchParams.append('end', end);
+
+    return this;
   }
 
   addSort (sort, order) {
-    // todo: implement logic
+    this.url.searchParams.append('sort', sort);
+    this.url.searchParams.append('order', order);
+
+    return this;
   }
 
   addFilter (filter, filterLte, filterGte) {
-    // todo: implement logic
+    this.url.searchParams.append('filter', filter);
+    this.url.searchParams.append('filter_lte', filterLte);
+    this.url.searchParams.append('filter_gte', filterGte);
+
+    return this;
   }
 }

src/patterns/03-factoryMethod/index.js

@@ -7,17 +7,29 @@ class Input {
 }
 
 export class TextInput extends Input {
-  // todo: implement logic
+  static create() {
+    return new TextInput();
+  }
 }
 
 export class NumberInput extends Input {
-  // todo: implement logic
+  static create() {
+    return new NumberInput();
+  }
 }
 
 export class EmailInput extends Input {
-  // todo: implement logic
+  static create() {
+    return new EmailInput();
+  }
 }
 
 export const inputFactory = (type = '') => {
-  // todo: implement logic
+  const inputs = {
+    text: TextInput,
+    number: NumberInput,
+    email: EmailInput,
+  }
+
+  return inputs[type].create();
 };

src/patterns/04-prototype/index.js

@@ -1,20 +1,36 @@
 class Monster {
-  // todo: implement logic
+  constructor(settings) {
+    this.settings = settings;
+  }
 }
 
 export default class Location {
   monsters = [];
 
   constructor(name = '', monstersCount = 0, monstersSettings = {}) {
     this.name = name;
-    // todo: implement logic
+    this.monstersCount = monstersCount;
+    this.monstersSettings = monstersSettings;
+  }
+
+  get monstersSettings() {
+    return this._settings;
+  }
+
+  set monstersSettings(value) {
+    this._settings = value;
+    this.initMonsters();
   }
 
   initMonsters () {
-    // todo: implement logic
+    const newMonsters = [];
+    for(let i = 0; i < this.monstersCount; i++) {
+      newMonsters.push(new Monster(this._settings));
+    }
+    this.monsters = newMonsters;
   }
 
   clone () {
-    // todo: implement logic
+    return new Location(this.name, this.monstersCount, { ...this._settings });
   }
 }

src/patterns/05-singleton/index.js

@@ -1,5 +1,11 @@
 export default class Singleton {
+  static instance;
+
   constructor() {
-    // todo: implement logic
+    if (Singleton.instance) {
+      return Singleton.instance;
+    }
+
+    Singleton.instance = this;
   }
 }

src/patterns/06-adapter/index.js

@@ -17,7 +17,8 @@ export class Rectangle {
 
 export class Adapter {
   constructor(shape) {
-    // todo: add implementation
+    this.width = shape.size;
+    this.height = shape.size;
   }
 }
 

src/patterns/07-bridge/index.js

@@ -11,8 +11,9 @@ export class GreenColorsPallet {
 }
 
 export class Notification {
-  constructor () {
-    // todo: add implementation
+  constructor (name, pallet) {
+    this.name = name;
+    this.colorsPallet = pallet;
   }
 
   toString () {

src/patterns/08-composite/index.js

@@ -4,7 +4,7 @@ export class Child {
   }
 
   getSum () {
-    // todo: add implementation
+    return this.value;
   }
 }
 
@@ -14,7 +14,7 @@ export class Parent {
   }
 
   getSum () {
-    // todo: add implementation
+    return this.values.reduce((acc, value) => acc + value.getSum(), 0);
   }
 }
 

src/patterns/09-decorator/index.js

@@ -1,13 +1,26 @@
 export class Milk {
   price = 2;
 
-  // todo: add implementation
+  constructor (extra) {
+    this.extra = extra;
+  }
+
+  getPrice () {
+    return this.extra ? this.extra.getPrice() + this.price : this.price;
+  }
 }
 
 export class Sugar {
   price = 1;
 
-  // todo: add implementation
+  // Смущает что получилось два одинаковых решения для Milk и для Sugar
+  constructor (extra) {
+    this.extra = extra;
+  }
+
+  getPrice () {
+    return this.extra ? this.extra.getPrice() + this.price : this.price;
+  }
 }
 
 export class Coffee {

src/patterns/10-facade/index.js

@@ -1,6 +1,14 @@
 export class Game {
+  constructor() {
+    this.hero = new Hero();
+    this.location = new Location();
+  }
   start () {
-    // todo: add implementation
+    this.hero.name = 'Barbarian';
+    this.location.name = 'darkForest';
+    this.location.addMonster(new Monster('demon'));
+    this.location.addMonster(new Monster('demon'));
+    this.location.addMonster(new Monster('undead'));
   }
 }
 

src/patterns/11-flyweight/index.js

@@ -1,5 +1,9 @@
 class Flyweight {
-  // todo: add implementation
+  constructor(name, country, color) {
+    this.name = name;
+    this.country = country;
+    this.color = color;
+  }
 }
 
 export class ProductsStore {
@@ -9,10 +13,18 @@ export class ProductsStore {
   addProduct (productData = {}) {
     const productFlyweight = this.getOrCreateFlyweight(productData.info);
 
-    // todo: add implementation
+    this.products.push({
+      ...productData,
+      info: productFlyweight,
+    });
   }
 
   getOrCreateFlyweight (info = {}) {
-    // todo: add implementation
+    const flyweightKey = `${info.name}${info.country}${info.color}`;
+    if (!this.flyweights[flyweightKey]) {
+      this.flyweights[flyweightKey] = info;
+    }
+
+    return this.flyweights[flyweightKey];
   }
 }

src/patterns/12-proxy/index.js

@@ -10,14 +10,19 @@ export class User {
 }
 
 export class ProxyUser {
+  // Не понимаю зачем здесь это свойство
   rights = [];
 
-  constructor() {
-    // todo: add implementation
+  constructor(user) {
+    this.user = user;
   }
 
   write () {
-    // todo: add implementation
+    if (this.user.rights.includes('admin')) {
+      return this.user.write();
+    }
+
+    return "user does not have permissions to write";
   }
 }
 

src/patterns/13-chainOfResponsibility/index.js

@@ -1,17 +1,29 @@
 class Handler {
   name = '';
   regExp = /./;
+  nextHandler;
 
   setNext (handler) {
-    // todo: implement
+    this.nextHandler = handler;
+    return this.nextHandler;
   }
 
   next (data) {
-    // todo: implement
+    if (this.nextHandler) {
+      return this.nextHandler?.validate(data);
+    }
   }
 
   validate (data) {
-    // todo: implement
+    if (this.regExp.test(data)) {
+      /* 
+        Непонятно для чего нужно свойство next, если можно записать короче:
+        return this.nextHandler?.validate(data);
+      */
+      return this.next(data);
+    }
+
+    return `Validation rule \"${this.name}\" didn\'t pass for string \"${data}\"`;
   }
 }
 

src/patterns/14-command/index.js

@@ -1,12 +1,20 @@
 export class NextPage {
+  constructor(pagination) {
+    this.pagination = pagination;
+  }
+
   execute () {
-    // todo: add implementation
+    this.pagination.nextPage();
   }
 }
 
 export class PrevPage {
+  constructor(pagination) {
+    this.pagination = pagination;
+  }
+
   execute () {
-    // todo: add implementation
+    this.pagination.prevPage();
   }
 }
 
@@ -24,10 +32,10 @@ export class Pagination {
 
 export class Button {
   constructor (command) {
-    // todo: add implementation
+    this.onClick = command;
   }
 
   click () {
-    // todo: add implementation
+    this.onClick.execute();
   }
 }

src/patterns/15-iterator/index.js

@@ -5,11 +5,18 @@ export class Range {
   }
 
   forEach (callback) {
-    // todo: add implementation
+    for(let i = this.start; i <= this.end; i++) {
+      callback(i);
+    }
   }
 
   getRange () {
-    // todo: add implementation
+    const array = [];
+    this.forEach((number) => {
+      array.push(number);
+    })
+
+    return array;
   }
 }