Add event signup (without additional fields)

src/models/event.js

 import { apiUrl } from './config';
-import { getToken } from './auth';
+import { getToken, getUserId, isLoggedIn } from './auth';
+import { log } from './log';
 
 const m = require('mithril');
 
@@ -19,6 +20,61 @@ export function getCurrent() {
   return this.current;
 }
 
+export function getCurrentSignup() {
+  return this.currentSignup;
+}
+
+export function checkCurrentSignup() {
+  const queryString = m.buildQueryString({
+    where: JSON.stringify({
+      user: getUserId(),
+      event: this.getCurrent()._id,
+    }),
+  });
+
+  return m.request({
+    method: 'GET',
+    url: `${apiUrl}/eventsignups?${queryString}`,
+    headers: getToken() ? {
+      Authorization: `Token ${getToken()}`,
+    } : {},
+  }).then((result) => {
+    [this.currentSignup] = result._items;
+    log(this.currentSignup);
+  });
+}
+
+export function signupCurrent(email = '') {
+  if (isLoggedIn()) {
+    log(`UserId: ${getUserId()}`);
+    m.request({
+      method: 'POST',
+      url: `${apiUrl}/eventsignups`,
+      data: {
+        event: this.current._id,
+        user: getUserId(),
+      },
+      headers: getToken() ? {
+        Authorization: `Token ${getToken()}`,
+      } : {},
+    }).then(() => { this.checkCurrentSignup(); });
+  } else if (this.current.allow_email_signup) {
+    if (email.length > 0) {
+      m.request({
+        method: 'POST',
+        url: `${apiUrl}/eventsignups`,
+        data: {
+          event: this.current._id,
+          email,
+        },
+        headers: getToken() ? {
+          Authorization: `Token ${getToken()}`,
+        } : {},
+      }).then(() => { this.checkCurrentSignup(); });
+    }
+  }
+}
+
 export function load(query = {}) {
   querySaved = query;
 
@@ -32,9 +88,9 @@ export function load(query = {}) {
   return m.request({
     method: 'GET',
     url: `${apiUrl}/events?${queryString}`,
-    headers: {
+    headers: getToken() ? {
       Authorization: `Token ${getToken()}`,
-    },
+    } : {},
   }).then((result) => {
     this.list = result._items.map((event) => {
       const newEvent = Object.assign({}, event);

src/views/eventDetails.js

 import * as events from '../models/event';
+import { isLoggedIn } from '../models/auth';
 
 const m = require('mithril');
 
+let signupEmail = '';
+
+class EventSignupForm {
+  static oninit() {
+    if (isLoggedIn()) {
+      events.checkCurrentSignup();
+    }
+  }
+
+  static view() {
+    if (typeof events.getCurrent() === 'undefined') {
+      return m('div');
+    }
+    if (isLoggedIn()) {
+      if (typeof events.getCurrentSignup() === 'undefined') {
+        return m('button', { onclick() { events.signupCurrent(); } }, 'signup');
+      }
+    } else if (events.getCurrent().allow_email_signup) {
+      return m('div', [
+        m('input', {
+          type: 'text',
+          placeholder: 'Email',
+          oninput: m.withAttr('value', (value) => { signupEmail = value; }),
+          value: signupEmail,
+        }),
+        m('button', { onclick() { events.signupCurrent(signupEmail); } }, 'signup'),
+      ]);
+    }
+    return m('div');
+  }
+}
+
 export default class EventDetails {
   static oninit(vnode) {
     events.loadCurrent(vnode.attrs.eventId);
@@ -17,6 +50,7 @@ export default class EventDetails {
       m('span', events.getCurrent().signup_count),
       m('span', events.getCurrent().spots),
       m('p', events.getCurrent().description_de),
+      m(EventSignupForm),
     ]);
   }
 }