From e958e0ecc7c6ad8e17ce2e7dc2c65daedf968267 Mon Sep 17 00:00:00 2001
From: Gergely Polonkai <gergely@polonkai.eu>
Date: Tue, 8 Mar 2016 20:49:34 +0000
Subject: [PATCH] Add event handler for m.room.redaction

---
 .gitignore                           |  1 +
 src/Makefile.am                      |  1 +
 src/matrix-event-room-redaction.vala | 85 ++++++++++++++++++++++++++++
 src/matrix-event-types.c             |  3 +
 4 files changed, 90 insertions(+)
 create mode 100644 src/matrix-event-room-redaction.vala

diff --git a/.gitignore b/.gitignore
index 9882c01..69ebc2f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -73,3 +73,4 @@ Makefile.in
 /src/matrix-event-room-avatar.c
 /src/matrix-event-room-message-feedback.c
 /src/matrix-event-room-guest-access.c
+/src/matrix-event-room-redaction.c
diff --git a/src/Makefile.am b/src/Makefile.am
index fd62d74..1d8dcb6 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -43,6 +43,7 @@ libmatrix_glib_0_0_la_VALA_SOURCES = \
 	matrix-event-room-avatar.vala \
 	matrix-event-room-message-feedback.vala \
 	matrix-event-room-guest-access.vala \
+	matrix-event-room-redaction.vala \
 	$(NULL)
 
 AM_CPPFLAGS += \
diff --git a/src/matrix-event-room-redaction.vala b/src/matrix-event-room-redaction.vala
new file mode 100644
index 0000000..dff18ca
--- /dev/null
+++ b/src/matrix-event-room-redaction.vala
@@ -0,0 +1,85 @@
+/*
+ * This file is part of matrix-glib-sdk
+ *
+ * matrix-glib-sdk is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * matrix-glib-sdk is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with matrix-glib-sdk. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Class to hold a m.room.redaction event
+ *
+ * Events can be redacted by either room or server admins. Redacting
+ * an event means that all keys not required by the protocol are
+ * stripped off, allowing admins to remove offensive or illegal
+ * content that may have been attached to any event. This cannot be
+ * undone, allowing server owners to physically delete the offending
+ * data. There is also a concept of a moderator hiding a message
+ * event, which can be undone, but cannot be applied to state
+ * events. The event that has been redacted is specified in the
+ * redacts event level key.
+ */
+public class Matrix.Event.RoomRedaction : Matrix.Event.Room {
+    /**
+     * The reason for the redaction, if any.
+     */
+    public string? reason { get; set; default = null; }
+
+    /**
+     * The event ID that was redacted.
+     */
+    public string? redacted_event_id { get; set; default = null; }
+
+    protected override void
+    from_json(Json.Node json_data)
+        throws Matrix.Error
+    {
+        var root = json_data.get_object();
+        var content_root = root.get_member("content").get_object();
+        Json.Node? node;
+
+        if ((node = content_root.get_member("reason")) != null) {
+            _reason = node.get_string();
+        }
+
+        if ((node = root.get_member("redacts")) != null) {
+            _redacted_event_id = node.get_string();
+        } else {
+            warning("redacts is missing from a m.room.redaction event");
+        }
+
+        base.from_json(json_data);
+    }
+
+    protected override void
+    to_json(Json.Node json_data)
+        throws Matrix.Error
+    {
+        if (_redacted_event_id == null) {
+            throw new Matrix.Error.INCOMPLETE(
+                    "Won't generate a m.room.redaction event without the redacts field");
+        }
+
+        var root = json_data.get_object();
+
+        root.set_string_member("redacts", _redacted_event_id);
+
+        if (_reason != null) {
+            var content_root = root.get_member("content").get_object();
+
+            content_root.set_string_member("reason", _reason);
+        }
+
+        base.to_json(json_data);
+    }
+}
diff --git a/src/matrix-event-types.c b/src/matrix-event-types.c
index 22168b7..2373880 100644
--- a/src/matrix-event-types.c
+++ b/src/matrix-event-types.c
@@ -203,6 +203,9 @@ matrix_event_types_ctor(void)
     matrix_event_register_type("m.room.guest_access",
                                MATRIX_EVENT_TYPE_ROOM_GUEST_ACCESS,
                                NULL);
+    matrix_event_register_type("m.room.redaction",
+                               MATRIX_EVENT_TYPE_ROOM_REDACTION,
+                               NULL);
 }
 
 void