Open API Typescript Client - Simplified Example

ApiConfigurator.ts

// ApiConfiguration.ts
export class ApiConfiguration {
  public static readonly BASE_URL: string = 'https://api.example.com';
  // possibly include API keys, custom headers, etc.
}

HttpClient.ts

// HttpClient.ts
import axios, { AxiosInstance } from 'axios';

export class HttpClient {
  private axiosInstance: AxiosInstance;

  constructor(baseURL: string) {
    this.axiosInstance = axios.create({
      baseURL
    });
  }

  public async get<T>(url: string): Promise<T> {
    const response = await this.axiosInstance.get<T>(url);
    return response.data;
  }

  public async post<T>(url: string, data: any): Promise<T> {
    const response = await this.axiosInstance.post<T>(url, data);
    return response.data;
  }

  // Add methods for PUT, DELETE, etc.
}

Index.ts

import { PetApi } from './PetApi';
import { HttpClient } from './HttpClient';
import { ApiConfiguration } from './ApiConfiguration';

const httpClient = new HttpClient(ApiConfiguration.BASE_URL);
const petApi = new PetApi(httpClient);

const main = async () => {
  try {
    const newPet = await petApi.addPet({ id: 0, name: 'Fido' });
    console.log(newPet);

    const pet = await petApi.getPetById(newPet.id);
    console.log(pet);
  } catch (error) {
    console.error('Error calling API', error);
  }
};

main();

Pet.ts

// Pet.ts
export interface Pet {
  id: number;
  name: string;
  tag?: string;
}

PetApi.ts

// PetApi.ts
import { Pet } from './Pet';
import { HttpClient } from './HttpClient'; // This is a simplified example of an HTTP client

export class PetApi {
  constructor(private httpClient: HttpClient) {}

  public async getPetById(petId: number): Promise<Pet> {
    return this.httpClient.get<Pet>(`/pets/${petId}`);
  }

  public async addPet(pet: Pet): Promise<Pet> {
    return this.httpClient.post<Pet>('/pets', pet);
  }
}