1 files changed, 92 insertions, 0 deletions
diff --git a/comm/calendar/base/modules/utils/calACLUtils.jsm b/comm/calendar/base/modules/utils/calACLUtils.jsm
new file mode 100644
index 0000000000..507d9f232d
--- /dev/null
+++ b/comm/calendar/base/modules/utils/calACLUtils.jsm
@@ -0,0 +1,92 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * Helpers for permission checks and other ACL features
+ */
+
+// NOTE: This module should not be loaded directly, it is available when
+// including calUtils.jsm under the cal.acl namespace.
+
+const EXPORTED_SYMBOLS = ["calacl"];
+
+var calacl = {
+  /**
+   * Check if the specified calendar is writable. This is the case when it is
+   * not marked readOnly, we are not offline, or we are offline and the
+   * calendar is local.
+   *
+   * @param aCalendar     The calendar to check
+   * @returns True if the calendar is writable
+   */
+  isCalendarWritable(aCalendar) {
+    return (
+      !aCalendar.getProperty("disabled") &&
+      !aCalendar.readOnly &&
+      (!Services.io.offline ||
+        aCalendar.getProperty("cache.enabled") ||
+        aCalendar.getProperty("cache.always") ||
+        aCalendar.getProperty("requiresNetwork") === false)
+    );
+  },
+
+  /**
+   * Check if the specified calendar is writable from an ACL point of view.
+   *
+   * @param aCalendar     The calendar to check
+   * @returns True if the calendar is writable
+   */
+  userCanAddItemsToCalendar(aCalendar) {
+    let aclEntry = aCalendar.aclEntry;
+    return (
+      !aclEntry || !aclEntry.hasAccessControl || aclEntry.userIsOwner || aclEntry.userCanAddItems
+    );
+  },
+
+  /**
+   * Check if the user can delete items from the specified calendar, from an
+   * ACL point of view.
+   *
+   * @param aCalendar     The calendar to check
+   * @returns True if the calendar is writable
+   */
+  userCanDeleteItemsFromCalendar(aCalendar) {
+    let aclEntry = aCalendar.aclEntry;
+    return (
+      !aclEntry || !aclEntry.hasAccessControl || aclEntry.userIsOwner || aclEntry.userCanDeleteItems
+    );
+  },
+
+  /**
+   * Check if the user can fully modify the specified item, from an ACL point
+   * of view.  Note to be confused with the right to respond to an
+   * invitation, which is handled instead by userCanRespondToInvitation.
+   *
+   * @param aItem         The calendar item to check
+   * @returns True if the item is modifiable
+   */
+  userCanModifyItem(aItem) {
+    let aclEntry = aItem.aclEntry;
+    return (
+      !aclEntry ||
+      !aclEntry.calendarEntry.hasAccessControl ||
+      aclEntry.calendarEntry.userIsOwner ||
+      aclEntry.userCanModify
+    );
+  },
+
+  /**
+   * Checks if the user can modify the item and has the right to respond to
+   * invitations for the item.
+   *
+   * @param aItem         The calendar item to check
+   * @returns True if the invitation w.r.t. the item can be
+   *                        responded to.
+   */
+  userCanRespondToInvitation(aItem) {
+    let aclEntry = aItem.aclEntry;
+    // TODO check if || is really wanted here
+    return calacl.userCanModifyItem(aItem) || aclEntry.userCanRespond;
+  },
+};