ENH: Set up ember-simple-auth (initial) (#12)

Fixes #6

app/authenticators/application.js

@@ -0,0 +1,50 @@
+import Ember from 'ember';
+import BaseAuthenticator from 'ember-simple-auth/authenticators/base';
+import config from '../config/environment';
+
+const { RSVP: { Promise }, $, get, isEmpty, run } = Ember;
+
+export default BaseAuthenticator.extend({
+  serverTokenEndpoint: `${config.APP.API_HOST}/api/auth/login/`,
+  tokenAttributeName: 'data.token',
+  identificationAttributeName: 'username',
+  verificationAttributeName: 'password',
+
+  restore(data) {
+    const tokenAttributeName = this.get('tokenAttributeName');
+    const tokenAttribute = get(data, tokenAttributeName);
+
+    if (!isEmpty(tokenAttribute)) {
+      return Promise.resolve(data);
+    } else {
+      return Promise.reject();
+    }
+  },
+
+  authenticate(username, password) {
+    return new Promise((resolve, reject) => {
+      const { identificationAttributeName: id, verificationAttributeName: verify } = this.getProperties('identificationAttributeName', 'verificationAttributeName');
+      const data = {};
+      data[id] = username;
+      data[verify] = password;
+      return this.makeRequest(data).then(
+        (response) => run(null, resolve, response),
+        (xhr) => run(null, reject, xhr.responseJSON || xhr.responseText)
+      );
+    });
+  },
+
+  invalidate() {
+    return Promise.resolve();
+  },
+
+  makeRequest(data, options) {
+    const serverTokenEndpoint = this.get('serverTokenEndpoint');
+    const requestOptions = $.extend({}, {
+      url: serverTokenEndpoint,
+      type: 'POST',
+      data,
+    }, options || {});
+    return $.ajax(requestOptions);
+  },
+});