Implemented loading of short URLs

src/api/ShlinkApiClient.js

@@ -0,0 +1,70 @@
+import axios from 'axios';
+import { isEmpty } from 'ramda';
+
+export class ShlinkApiClient {
+  constructor(axios) {
+    this.axios = axios;
+    this._baseUrl = '';
+    this._apiKey = '';
+    this._token = '';
+  }
+
+  /**
+   * Sets the base URL to be used on any request
+   * @param {String} baseUrl
+   * @param {String} apiKey
+   */
+  setConfig = ({ url, apiKey }) => {
+    this._baseUrl = url;
+    this._apiKey = apiKey;
+  };
+
+  /**
+   * Returns the list of short URLs
+   * @param params
+   * @returns {Promise<Array>}
+   */
+  listShortUrls = (params = {}) => {
+    const { page = 1 } = params;
+    return this._performRequest(`/rest/short-codes?page=${page}`)
+      .then(resp => resp.data.shortUrls.data)
+      .catch(e => {
+        // If auth failed, reset token to force it to be regenerated, and perform a new request
+        if (e.response.status === 401) {
+          this._token = '';
+          return this.listShortUrls(params);
+        }
+
+        // Otherwise, let caller handle the rejection
+        return Promise.reject(e);
+      });
+  };
+
+  _performRequest = async (url, method = 'GET') => {
+    if (isEmpty(this._token)) {
+      this._token = await this._handleAuth();
+    }
+
+    return await this.axios({
+      method,
+      url: `${this._baseUrl}${url}`,
+      headers: { 'Authorization': `Bearer ${this._token}` }
+    }).then(resp => {
+      // Save new token
+      const { authorization = '' } = resp.headers;
+      this._token = authorization.substr('Bearer '.length);
+      return resp;
+    });
+  };
+
+  _handleAuth = async () => {
+    const resp = await this.axios({
+      method: 'POST',
+      url: `${this._baseUrl}/rest/authenticate`,
+      data: { apiKey: this._apiKey }
+    });
+    return resp.data.token;
+  };
+}
+
+export default new ShlinkApiClient(axios);