1 files changed, 274 insertions, 0 deletions
diff --git a/js/dav/lib/calendars.js b/js/dav/lib/calendars.js
new file mode 100644
index 00000000..89a44fe1
--- /dev/null
+++ b/js/dav/lib/calendars.js
@@ -0,0 +1,274 @@
+import co from 'co';
+import url from 'url';
+
+import fuzzyUrlEquals from './fuzzy_url_equals';
+import { Calendar, CalendarObject } from './model';
+import * as ns from './namespace';
+import * as request from './request';
+import * as webdav from './webdav';
+
+let debug = require('./debug')('dav:calendars');
+
+const ICAL_OBJS = new Set([
+  'VEVENT',
+  'VTODO',
+  'VJOURNAL',
+  'VFREEBUSY',
+  'VTIMEZONE',
+  'VALARM'
+]);
+
+/**
+ * @param {dav.Account} account to fetch calendars for.
+ */
+export let listCalendars = co.wrap(function *(account, options) {
+  debug(`Fetch calendars from home url ${account.homeUrl}`);
+  var req = request.propfind({
+    props: [
+      { name: 'calendar-description', namespace: ns.CALDAV },
+      { name: 'calendar-timezone', namespace: ns.CALDAV },
+      { name: 'displayname', namespace: ns.DAV },
+      { name: 'getctag', namespace: ns.CALENDAR_SERVER },
+      { name: 'resourcetype', namespace: ns.DAV },
+      { name: 'supported-calendar-component-set', namespace: ns.CALDAV },
+      { name: 'sync-token', namespace: ns.DAV }
+    ],
+    depth: 1
+  });
+
+  let responses = yield options.xhr.send(req, account.homeUrl, {
+    sandbox: options.sandbox
+  });
+
+  debug(`Found ${responses.length} calendars.`);
+  let cals = responses
+    .filter(res => {
+      // We only want the calendar if it contains iCalendar objects.
+      let components = res.props.supportedCalendarComponentSet || [];
+      return components.reduce((hasObjs, component) => {
+          return hasObjs || ICAL_OBJS.has(component)
+      }, false)
+    })
+    .map(res => {
+      debug(`Found calendar ${res.props.displayname},
+             props: ${JSON.stringify(res.props)}`);
+      return new Calendar({
+        data: res,
+        account: account,
+        description: res.props.calendarDescription,
+        timezone: res.props.calendarTimezone,
+        url: url.resolve(account.rootUrl, res.href),
+        ctag: res.props.getctag,
+        displayName: res.props.displayname,
+        components: res.props.supportedCalendarComponentSet,
+        resourcetype: res.props.resourcetype,
+        syncToken: res.props.syncToken
+      });
+    });
+
+  yield cals.map(co.wrap(function *(cal) {
+    cal.reports = yield webdav.supportedReportSet(cal, options);
+  }));
+
+  return cals;
+});
+
+/**
+ * @param {dav.Calendar} calendar the calendar to put the object on.
+ * @return {Promise} promise will resolve when the calendar has been created.
+ *
+ * Options:
+ *
+ *   (String) data - rfc 5545 VCALENDAR object.
+ *   (String) filename - name for the calendar ics file.
+ *   (dav.Sandbox) sandbox - optional request sandbox.
+ *   (dav.Transport) xhr - request sender.
+ */
+export function createCalendarObject(calendar, options) {
+  var objectUrl = url.resolve(calendar.url, options.filename);
+  return webdav.createObject(objectUrl, options.data, options);
+};
+
+/**
+ * @param {dav.CalendarObject} calendarObject updated calendar object.
+ * @return {Promise} promise will resolve when the calendar has been updated.
+ *
+ * Options:
+ *
+ *   (dav.Sandbox) sandbox - optional request sandbox.
+ *   (dav.Transport) xhr - request sender.
+ */
+export function updateCalendarObject(calendarObject, options) {
+  return webdav.updateObject(
+    calendarObject.url,
+    calendarObject.calendarData,
+    calendarObject.etag,
+    options
+  );
+}
+
+/**
+ * @param {dav.CalendarObject} calendarObject target calendar object.
+ * @return {Promise} promise will resolve when the calendar has been deleted.
+ *
+ * Options:
+ *
+ *   (dav.Sandbox) sandbox - optional request sandbox.
+ *   (dav.Transport) xhr - request sender.
+ */
+export function deleteCalendarObject(calendarObject, options) {
+  return webdav.deleteObject(
+    calendarObject.url,
+    calendarObject.etag,
+    options
+  );
+}
+
+/**
+ * @param {dav.Calendar} calendar the calendar to fetch objects for.
+ *
+ * Options:
+ *
+ *   (Array.<Object>) filters - optional caldav filters.
+ *   (dav.Sandbox) sandbox - optional request sandbox.
+ *   (dav.Transport) xhr - request sender.
+ */
+export let listCalendarObjects = co.wrap(function *(calendar, options) {
+  debug(`Doing REPORT on calendar ${calendar.url} which belongs to
+         ${calendar.account.credentials.username}`);
+
+  let filters = options.filters || [{
+    type: 'comp-filter',
+    attrs: { name: 'VCALENDAR' },
+    children: [{
+      type: 'comp-filter',
+      attrs: { name: 'VEVENT' }
+    }]
+  }];
+
+  let req = request.calendarQuery({
+    depth: 1,
+    props: [
+      { name: 'getetag', namespace: ns.DAV },
+      { name: 'calendar-data', namespace: ns.CALDAV }
+    ],
+    filters: filters
+  });
+
+  let responses = yield options.xhr.send(req, calendar.url, {
+    sandbox: options.sandbox
+  });
+
+  return responses.map(res => {
+    debug(`Found calendar object with url ${res.href}`);
+    return new CalendarObject({
+      data: res,
+      calendar: calendar,
+      url: url.resolve(calendar.account.rootUrl, res.href),
+      etag: res.props.getetag,
+      calendarData: res.props.calendarData
+    });
+  });
+});
+
+/**
+ * @param {dav.Calendar} calendar the calendar to fetch updates to.
+ * @return {Promise} promise will resolve with updated calendar object.
+ *
+ * Options:
+ *
+ *   (Array.<Object>) filters - list of caldav filters to send with request.
+ *   (dav.Sandbox) sandbox - optional request sandbox.
+ *   (String) syncMethod - either 'basic' or 'webdav'. If unspecified, will
+ *       try to do webdav sync and failover to basic sync if rfc 6578 is not
+ *       supported by the server.
+ *   (String) timezone - VTIMEZONE calendar object.
+ *   (dav.Transport) xhr - request sender.
+ */
+export function syncCalendar(calendar, options) {
+  options.basicSync = basicSync;
+  options.webdavSync = webdavSync;
+  return webdav.syncCollection(calendar, options);
+}
+
+/**
+ * @param {dav.Account} account the account to fetch updates for.
+ * @return {Promise} promise will resolve with updated account.
+ *
+ * Options:
+ *
+ *   (dav.Sandbox) sandbox - optional request sandbox.
+ *   (dav.Transport) xhr - request sender.
+ */
+export let syncCaldavAccount = co.wrap(function *(account, options={}) {
+  options.loadObjects = false;
+  if (!account.calendars) account.calendars = [];
+
+  let cals = yield listCalendars(account, options);
+  cals
+    .filter(cal => {
+      // Filter the calendars not previously seen.
+      return account.calendars.every(prev => !fuzzyUrlEquals(prev.url, cal.url));
+    })
+    .forEach(cal => {
+      // Add them to the account's calendar list.
+      account.calendars.push(cal);
+    });
+
+  options.loadObjects = true;
+  yield account.calendars.map(co.wrap(function *(cal, index) {
+    try {
+      yield syncCalendar(cal, options);
+    } catch (error) {
+      debug(`Sync calendar ${cal.displayName} failed with ${error}`);
+      account.calendars.splice(index, 1);
+    }
+  }));
+
+  return account;
+});
+
+let basicSync = co.wrap(function *(calendar, options) {
+  let sync = yield webdav.isCollectionDirty(calendar, options);
+  if (!sync) {
+    debug('Local ctag matched remote! No need to sync :).');
+    return calendar;
+  }
+
+  debug('ctag changed so we need to fetch stuffs.');
+  calendar.objects = yield listCalendarObjects(calendar, options);
+  return calendar;
+});
+
+let webdavSync = co.wrap(function *(calendar, options) {
+  var req = request.syncCollection({
+    props: [
+      { name: 'getetag', namespace: ns.DAV },
+      { name: 'calendar-data', namespace: ns.CALDAV }
+    ],
+    syncLevel: 1,
+    syncToken: calendar.syncToken
+  });
+
+  let result = yield options.xhr.send(req, calendar.url, {
+    sandbox: options.sandbox
+  });
+
+  // TODO(gareth): Handle creations and deletions.
+  result.responses.forEach(function(response) {
+    // Find the calendar object that this response corresponds with.
+    var calendarObject = calendar.objects.filter(function(object) {
+      return fuzzyUrlEquals(object.url, response.href);
+    })[0];
+
+    if (!calendarObject) {
+      return;
+    }
+
+    calendarObject.etag = response.props.getetag;
+    calendarObject.calendarData = response.props.calendarData;
+  });
+
+  calendar.syncToken = result.syncToken;
+  return calendar;
+});