Реализует CLI приложение.

package.json

@@ -30,5 +30,8 @@
   "engines": {
     "node": "^20.0.0",
     "npm": ">=10"
+  },
+  "dependencies": {
+    "chalk": "5.3.0"
   }
 }

src/cli/cli.application.ts

@@ -0,0 +1,44 @@
+import { CommandParser } from './command-parser.js';
+import { Command } from './commands/command.interface.js';
+
+type CommandCollection = Record<string, Command>
+
+export class CLIApplication {
+
+  constructor(
+    private readonly defaultCommand: string = '--help'
+  ) {}
+
+  private commands: CommandCollection = {};
+
+  public registerCommands(commandList: Command[]): void {
+    commandList.forEach((command) => {
+
+      if (Object.hasOwn(this.commands, command.getName())) {
+        throw new Error (`Command ${command.getName()} is already registered`);
+      }
+
+      this.commands[command.getName()] = command;
+    });
+  }
+
+  public getDefaultCommand(): Command | never {
+    if (! this.commands[this.defaultCommand]) {
+      throw new Error(`The default command (${this.defaultCommand}) is not registered.`);
+    }
+
+    return this.commands[this.defaultCommand];
+  }
+
+  public getCommand(commandName: string): Command {
+    return this.commands[commandName] ?? this.getDefaultCommand();
+  }
+
+  public processCommand(argv: string[]): void {
+    const parsedCommand = CommandParser.parse(argv);
+    const [commandName] = Object.keys(parsedCommand);
+    const command = this.getCommand(commandName);
+    const commandArguments = parsedCommand[commandName] ?? [];
+    command.execute(...commandArguments);
+  }
+}

src/cli/command-parser.ts

@@ -0,0 +1,19 @@
+type ParsedCommand = Record<string, string[]>
+
+export class CommandParser {
+  static parse(cliArguments: string[]): ParsedCommand {
+    const parsedCommand: ParsedCommand = {};
+    let currentCommand = '';
+
+    for (const argument of cliArguments) {
+      if (argument.startsWith('--')) {
+        parsedCommand[argument] = [];
+        currentCommand = argument;
+      } else if (currentCommand && argument) {
+        parsedCommand[currentCommand].push(argument);
+      }
+    }
+
+    return parsedCommand;
+  }
+}

src/cli/commands/command.interface.ts

@@ -0,0 +1,5 @@
+export interface Command {
+  getName(): string;
+  execute(... parameters: string[]): void;
+}
+

src/cli/commands/help.command.ts

@@ -0,0 +1,21 @@
+import { Command } from './command.interface.js';
+
+export class HelpCommand implements Command {
+
+  public getName(): string {
+    return '--help';
+  }
+
+  public async execute(..._parameters: string[]): Promise<void> {
+    console.info(`
+    Программа для подготовки данных для REST API сервера.
+      Пример:
+        cli.js --<command> [--arguments]
+    Команды:
+        --version:                   # выводит номер версии
+        --help:                      # печатает этот текст
+        --import <path>:             # импортирует данные из TSV
+        --generate <n> <path> <url>  # генерирует произвольное количество тестовых данных
+    `);
+  }
+}

src/cli/commands/import.command.ts

@@ -0,0 +1,25 @@
+import { TSVFileReader } from '../../shared/libs/file-reader/tsv-file-reader.js';
+import { Command } from './command.interface.js';
+
+export class ImportCommand implements Command {
+  public getName(): string {
+    return '--import';
+  }
+
+  public execute(...parameters: string[]): void {
+    const [filename] = parameters;
+    const fileReader = new TSVFileReader(filename.trim());
+
+    try {
+      fileReader.read();
+      console.log(fileReader.toArray());
+    } catch (err) {
+      if (!(err instanceof Error)) {
+        throw err;
+      }
+
+      console.error(`Can't import data from file: ${filename}`);
+      console.error(`Details: ${err.message}`);
+    }
+  }
+}

src/cli/commands/version.command.ts

@@ -0,0 +1,49 @@
+import { Command } from './command.interface.js';
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+type PackageJSONConfig = {
+  version: string;
+}
+
+const isPackageJSONConfig = (value: unknown): value is PackageJSONConfig => (
+  typeof value === 'object' &&
+    value !== null &&
+    !Array.isArray(value) &&
+    Object.hasOwn(value, 'version')
+);
+
+export class VersionCommand implements Command {
+
+  constructor(
+    private readonly filePath: string = 'package.json'
+  ) {}
+
+  private readVersion(): string {
+    const jsonContent = readFileSync(resolve(this.filePath), 'utf-8');
+    const importedContent: unknown = JSON.parse(jsonContent);
+
+    if (! isPackageJSONConfig(importedContent)) {
+      throw new Error('Failed to parse json content.');
+    }
+
+    return importedContent.version;
+  }
+
+  public getName(): string {
+    return '--version';
+  }
+
+  public async execute(..._parameters: string[]): Promise<void> {
+    try {
+      const version = this.readVersion;
+      console.info(version);
+    } catch (error: unknown) {
+      console.error(`Failed to read version from ${this.filePath}`);
+
+      if (error instanceof Error) {
+        console.error(error.message);
+      }
+    }
+  }
+}

src/cli/index.ts

@@ -0,0 +1,5 @@
+export { CLIApplication } from './cli.application.js';
+export { CommandParser } from './command-parser.js';
+export { HelpCommand } from './commands/help.command.js';
+export { VersionCommand } from './commands/version.command.js';
+export { ImportCommand } from './commands/import.command.js';

src/main.cli.ts

@@ -0,0 +1,10 @@
+import { CLIApplication, HelpCommand, VersionCommand, ImportCommand } from './cli/index.js';
+
+const bootstrap = () => {
+  const cliApplication = new CLIApplication();
+  cliApplication.registerCommands([new HelpCommand(), new VersionCommand(), new ImportCommand()]);
+
+  cliApplication.processCommand(process.argv);
+};
+
+bootstrap();

src/shared/libs/file-reader/file-reader.interface.ts

@@ -0,0 +1,3 @@
+export interface FileReader {
+  read(): void;
+}

src/shared/libs/file-reader/index.ts

@@ -0,0 +1,2 @@
+export { TSVFileReader } from './tsv-file-reader.js';
+export { FileReader } from './file-reader.interface.js';

src/shared/libs/file-reader/tsv-file-reader.ts

@@ -0,0 +1,97 @@
+import { readFileSync } from 'node:fs';
+import { FileReader } from './index.js';
+import { Offer, TypeUser } from '../../types/index.js';
+export class TSVFileReader implements FileReader {
+  private rawData = '';
+
+  constructor(
+    private readonly filename: string
+  ) {}
+
+  private parseRawDataToOffers(): Offer[] {
+    return this.rawData
+      .split('\n')
+      .filter((row) => row.trim().length > 0)
+      .map((line) => this.parseLineToOffer(line));
+  }
+
+  private parseLineToOffer(line: string): Offer {
+    const [
+      title,
+      description,
+      date,
+      city,
+      previewImage,
+      images,
+      isFavorite,
+      isPremium,
+      rating,
+      type,
+      bedrooms,
+      maxAdults,
+      price,
+      goods,
+      name,
+      email,
+      avatarUser,
+      password,
+      typeUser,
+    ] = line.split('\t');
+
+    return {
+      title,
+      description,
+      postDate: new Date(date),
+      city,
+      previewImage,
+      images: this.parseImages(images),
+      isFavorite: this.parseBoolean(isFavorite),
+      isPremium: this.parseBoolean(isPremium),
+      rating: this.parseStringToNumber(rating),
+      type,
+      bedrooms: this.parseStringToNumber(bedrooms),
+      maxAdults: this.parseStringToNumber(maxAdults),
+      price: this.parseStringToNumber(price),
+      goods: this.parseGoods(goods),
+      host: this.parseHost(name, email, avatarUser, password, typeUser)
+    };
+  }
+
+  private parseBoolean(itemString: string): boolean {
+    if (itemString === 'true') {
+      return true;
+    }
+    return false;
+  }
+
+  private parseStringToNumber(itemString: string): number {
+    return Number.parseInt(itemString, 10);
+  }
+
+  private parseGoods(goods: string): {good: string}[] {
+    return goods.split(',').map((good) => ({good}));
+  }
+
+  private parseImages(images: string): {img: string}[] {
+    return images.split(',').map((img) => ({img}));
+  }
+
+  private parseHost(name: string, email: string, avatarUser: string, password: string, typeUser: string) {
+    return {name, email, avatarUser, password, typeUser:TypeUser[typeUser as 'Pro' | 'Usual']};
+  }
+
+  private validateRawData(): void {
+    if (! this.rawData) {
+      throw new Error('File was not read');
+    }
+  }
+
+  public read(): void {
+    this.rawData = readFileSync(this.filename, 'utf-8');
+  }
+
+  public toArray(): Offer[] {
+    this.validateRawData();
+    return this.parseRawDataToOffers();
+  }
+}