From af07890853cd01721bca81dd1e693b62635dda80 Mon Sep 17 00:00:00 2001
From: Richard Park <objectiv@gmail.com>
Date: Tue, 2 Aug 2016 00:14:14 -0400
Subject: [PATCH] feat(api): dispatch requests to soundcloud api

---
 src/core/api/_specs/api-service.spec.js | 107 ++++++++++++++++++++++++
 src/core/api/api-service.js             |  30 +++++++
 src/core/constants.js                   |  16 ++++
 3 files changed, 153 insertions(+)
 create mode 100644 src/core/api/_specs/api-service.spec.js
 create mode 100644 src/core/api/api-service.js
 create mode 100644 src/core/constants.js

diff --git a/src/core/api/_specs/api-service.spec.js b/src/core/api/_specs/api-service.spec.js
new file mode 100644
index 0000000..782b4d2
--- /dev/null
+++ b/src/core/api/_specs/api-service.spec.js
@@ -0,0 +1,107 @@
+import { API_BASE_URL, CLIENT_ID_PARAM, PAGINATION_PARAMS } from 'src/core/constants';
+import { api, dispatch, requestUrl } from '../api-service';
+
+
+describe('api', () => {
+  describe('service', () => {
+    let body;
+    let server;
+    let successResponse;
+
+
+    beforeEach(() => {
+      body = {};
+      server = sinon.fakeServer.create();
+      successResponse = [200, {'Content-type': 'application/json'}, JSON.stringify(body)];
+    });
+
+
+    afterEach(() => {
+      server.restore();
+    });
+
+
+    describe('requestUrl()', () => {
+      it('should add client id param to url', () => {
+        let url = requestUrl({url: API_BASE_URL});
+        expect(url).toMatch(CLIENT_ID_PARAM);
+      });
+
+      it('should NOT add duplicate client id param to url', () => {
+        let regExp = new RegExp(CLIENT_ID_PARAM, 'gi');
+        let url = requestUrl({url: `${API_BASE_URL}?${CLIENT_ID_PARAM}`});
+        expect(url.match(regExp).length).toBe(1);
+      });
+
+      it('should add pagination params to url if options.paginate is true', () => {
+        let url = requestUrl({paginate: true, url: API_BASE_URL});
+        expect(url).toMatch(PAGINATION_PARAMS);
+      });
+
+      it('should NOT add pagination params to url by default', () => {
+        let url = requestUrl({url: API_BASE_URL});
+        expect(url).not.toMatch(PAGINATION_PARAMS);
+      });
+    });
+
+
+    describe('dispatch()', () => {
+      const url = `${API_BASE_URL}?${CLIENT_ID_PARAM}`;
+
+      it('should set request header `Accept: application/json`', () => {
+        server.respondWith('get', url, ({requestHeaders}) => {
+          expect(requestHeaders.Accept).toBe('application/json');
+          return successResponse;
+        });
+
+        dispatch({url: API_BASE_URL});
+        server.respond();
+      });
+
+      it('should resolve promise with response body', done => {
+        server.respondWith('get', url, successResponse);
+
+        dispatch({url: API_BASE_URL})
+          .then(responseBody => {
+            expect(responseBody).toEqual(body);
+            done();
+          })
+          .catch(error => {
+            fail(error);
+            done();
+          });
+
+        server.respond();
+      });
+
+      it('should reject promise for soundcloud error codes', () => {
+        [400, 401, 403, 404, 406, 422, 429, 500, 503, 504]
+          .forEach(code => {
+            server.respondWith([code, {}, JSON.stringify({})]);
+
+            dispatch({url: API_BASE_URL})
+              .catch(error => {
+                expect(error.status).toBe(code);
+              });
+
+            server.respond();
+          });
+      });
+    });
+
+
+    describe('api.fetch()', () => {
+      it('should perform GET request with correct url', () => {
+        const url = `${API_BASE_URL}?${CLIENT_ID_PARAM}`;
+
+        server.respondWith('get', url, request => {
+          expect(request.url).toBe(url);
+          return successResponse;
+        });
+
+        api.fetch(url);
+        server.respond();
+      });
+    });
+  });
+});
diff --git a/src/core/api/api-service.js b/src/core/api/api-service.js
new file mode 100644
index 0000000..97e2a57
--- /dev/null
+++ b/src/core/api/api-service.js
@@ -0,0 +1,30 @@
+import request from 'superagent';
+import { CLIENT_ID_PARAM, PAGINATION_PARAMS } from 'src/core/constants';
+
+
+export const api = {
+  fetch(url) {
+    return dispatch({url});
+  }
+};
+
+
+export function dispatch(options) {
+  return request[options.method || 'get'](requestUrl(options))
+    .set('Accept', 'application/json')
+    .then(response => response.body);
+}
+
+export function requestUrl({paginate, url}) {
+  let params = [];
+
+  if (!url.includes(CLIENT_ID_PARAM)) params.push(CLIENT_ID_PARAM);
+  if (paginate) params.push(PAGINATION_PARAMS);
+
+  if (params.length) {
+    url += url.indexOf('?') === -1 ? '?' : '&';
+    url += params.join('&');
+  }
+
+  return url;
+}
diff --git a/src/core/constants.js b/src/core/constants.js
new file mode 100644
index 0000000..eb66444
--- /dev/null
+++ b/src/core/constants.js
@@ -0,0 +1,16 @@
+//=========================================================
+//  CONSTANTS
+//---------------------------------------------------------
+export const APP_NAME = 'soundcloud-redux';
+
+
+//=====================================
+//  API
+//-------------------------------------
+export const API_BASE_URL = 'https://api.soundcloud.com';
+
+export const CLIENT_ID = process.env.SOUNDCLOUD_CLIENT_ID || 'd02c42795f3bcac39f84eee0ae384b00';
+export const CLIENT_ID_PARAM = `client_id=${CLIENT_ID}`;
+
+export const PAGINATION_LIMIT = 3;
+export const PAGINATION_PARAMS = `limit=${PAGINATION_LIMIT}&linked_partitioning=1`;