rdv: init vue component for calendar range editing + refactor vue calendar code

src/Bundle/ChillCalendarBundle/Resources/public/vuejs/_api/api.js

@@ -0,0 +1,32 @@
+/*
+* Endpoint chill_api_single_calendar_range
+* method GET, get Calendar ranges
+* @returns {Promise} a promise containing all Calendar ranges objects
+*/
+const fetchCalendarRanges = () => {
+   const url = `/api/1.0/calendar/calendar-range-available.json`;
+   return fetch(url)
+      .then(response => {
+         if (response.ok) { return response.json(); }
+         throw Error('Error with request resource response');
+      });
+};
+
+/*
+* Endpoint chill_api_single_calendar
+* method GET, get Calendar events, can be filtered by mainUser
+* @returns {Promise} a promise containing all Calendar objects
+*/
+const fetchCalendar = (mainUserId) => {
+   const url = `/api/1.0/calendar/calendar.json?main_user=${mainUserId}&item_per_page=1000`;
+   return fetch(url)
+      .then(response => {
+         if (response.ok) { return response.json(); }
+         throw Error('Error with request resource response');
+      });
+};
+
+export {
+   fetchCalendarRanges,
+   fetchCalendar
+};