Port MatrixEventCallCandidates to C

.gitignore

@@ -53,5 +53,4 @@ Makefile.in
 /src/matrix-http-client.c
 /src/namespace-info.vala
 /src/namespace-info.c
-/src/matrix-event-call-candidates.c
 /src/matrix-glib-0.0.pc

src/Makefile.am

@@ -21,7 +21,6 @@ libmatrix_glib_0_0_la_VALA_SOURCES = \
 	matrix-client.vala \
 	matrix-http-api.vala \
 	matrix-http-client.vala \
-	matrix-event-call-candidates.vala \
 	$(NULL)
 
 AM_CPPFLAGS += \
@@ -82,6 +81,7 @@ INST_H_SRC_FILES = \
 	matrix-event-call-answer.h \
 	matrix-event-call-hangup.h \
 	matrix-event-call-invite.h \
+	matrix-event-call-candidates.h \
 	matrix-message-base.h \
 	matrix-message-text.h \
 	matrix-message-location.h \
@@ -140,6 +140,7 @@ libmatrix_glib_0_0_la_SOURCES = \
 	matrix-event-call-answer.c \
 	matrix-event-call-hangup.c \
 	matrix-event-call-invite.c \
+	matrix-event-call-candidates.c \
 	matrix-message-base.c \
 	matrix-message-text.c \
 	matrix-message-location.c \

src/matrix-event-call-candidates.c

@@ -0,0 +1,491 @@
+/*
+ * 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/>.
+ */
+
+#include "matrix-event-call-candidates.h"
+#include "matrix-enumtypes.h"
+
+/**
+ * SECTION:matrix-event-call-candidates
+ * @short_description: Event to represent call candidates
+ *
+ */
+
+struct _MatrixCallCandidate {
+    gchar *sdp_mid;     /// The SDP media type this candidate is intended for.
+    int sdp_line_index; /// The index of the SDP 'm' line this candidate is intended for.
+    gchar *candidate;   /// The SDP 'a' line of the candidate.
+
+    guint refcount;
+};
+
+/**
+ * MatrixCallCandidate:
+ *
+ * An opaque data structure to represent a call candidate.
+ */
+G_DEFINE_BOXED_TYPE(MatrixCallCandidate, matrix_call_candidate, (GBoxedCopyFunc)matrix_call_candidate_unref, (GBoxedFreeFunc)matrix_call_candidate_unref);
+
+/**
+ * matrix_call_candidate_new:
+ *
+ * Create a new #MatrixCallCandidate object with a reference count of 1.
+ *
+ * Returns: (transfer full): a new #MatrixCallCandidate object
+ */
+MatrixCallCandidate *
+matrix_call_candidate_new(void)
+{
+    MatrixCallCandidate *ret;
+
+    ret = g_new0(MatrixCallCandidate, 1);
+    ret->refcount = 1;
+
+    return ret;
+}
+
+/**
+ * matrix_call_candidate_ref:
+ * @candidate: a #MatrixCallCandidate
+ *
+ * Increment reference count on @candidate.
+ *
+ * Returns: (transfer full): the same object
+ */
+MatrixCallCandidate *
+matrix_call_candidate_ref(MatrixCallCandidate *matrix_call_candidate)
+{
+    g_return_val_if_fail(matrix_call_candidate != NULL, NULL);
+
+    matrix_call_candidate->refcount++;
+
+    return matrix_call_candidate;
+}
+
+/**
+ * matrix_call_candidate_unref:
+ * @candidate: a #MatrixCallCandidate
+ *
+ * Decrement reference count on @candidate.
+ *
+ * If reference count reaches zero, @candidate gets freed.
+ */
+void
+matrix_call_candidate_unref(MatrixCallCandidate *matrix_call_candidate)
+{
+    g_return_if_fail(matrix_call_candidate != NULL);
+
+    g_free(matrix_call_candidate->sdp_mid);
+    g_free(matrix_call_candidate->candidate);
+    g_free(matrix_call_candidate);
+}
+
+/**
+ * matrix_call_candidate_get_sdp_mid:
+ * @candidate: a #MatrixCallCandidate
+ *
+ * Get the SDP mid of @candidate.
+ *
+ * Returns: (transfer none) (nullable): the SDP mid
+ */
+const gchar *
+matrix_call_candidate_get_sdp_mid(MatrixCallCandidate *matrix_call_candidate)
+{
+    g_return_val_if_fail(matrix_call_candidate != NULL, NULL);
+
+    return matrix_call_candidate->sdp_mid;
+}
+
+/**
+ * matrix_call_candidate_set_sdp_mid:
+ * @candidate: a #MatrixCallCandidate
+ * @sdp_mid: an SDP mid
+ *
+ * Set the SDP mid for @candidate.
+ */
+void
+matrix_call_candidate_set_sdp_mid(MatrixCallCandidate *matrix_call_candidate, const gchar *sdp_mid)
+{
+    g_return_if_fail(matrix_call_candidate);
+
+    g_free(matrix_call_candidate->sdp_mid);
+    matrix_call_candidate->sdp_mid = g_strdup(sdp_mid);
+}
+
+/**
+ * matrix_call_candidate_get_sdp_line_index:
+ * @candidate: a #MatrixCallCandidate
+ *
+ * Get the SDP line of @candidate.
+ *
+ * The value returned is owned by @candidate and should not be freed.
+ *
+ * Returns: (transfer none) (nullable): the SDP line
+ */
+int
+matrix_call_candidate_get_sdp_line_index(MatrixCallCandidate *matrix_call_candidate)
+{
+    g_return_val_if_fail(matrix_call_candidate != NULL, 0);
+
+    return matrix_call_candidate->sdp_line_index;
+}
+
+/**
+ * matrix_call_candidate_set_sdp_line_index:
+ * @candidate: a #MatrixCallCandidate
+ * @sdp_line_index: an SDP line index
+ *
+ * Set the SDP line index of @candidate.
+ */
+void
+matrix_call_candidate_set_sdp_line_index(MatrixCallCandidate *matrix_call_candidate, int sdp_line_index)
+{
+    g_return_if_fail(matrix_call_candidate != NULL);
+
+    matrix_call_candidate->sdp_line_index = sdp_line_index;
+}
+
+/**
+ * matrix_call_candidate_get_candidate:
+ * @candidate: a #MatrixCallCandidate
+ *
+ * Get the call candidate from @candidate.
+ *
+ * The returned value is owned by @candidate and should not be freed.
+ *
+ * Returns: (transfer none) (nullable): the candidate name
+ */
+const gchar *
+matrix_call_candidate_get_candidate(MatrixCallCandidate *matrix_call_candidate)
+{
+    g_return_val_if_fail(matrix_call_candidate != NULL, NULL);
+
+    return matrix_call_candidate->candidate;
+}
+
+/**
+ * matrix_call_candidate_set_candidate:
+ * @candidate: a #MatrixCallCandidate
+ * @candidate_name: (transfer none) (nullable): the name of the candidate
+ *
+ * Set the name of the call candidate.
+ */
+void
+matrix_call_candidate_set_candidate(MatrixCallCandidate *matrix_call_candidate, const gchar *candidate)
+{
+    g_return_if_fail(matrix_call_candidate != NULL);
+
+    g_free(matrix_call_candidate->candidate);
+    matrix_call_candidate->candidate = g_strdup(candidate);
+}
+
+enum {
+    PROP_0,
+    PROP_CANDIDATES,
+    NUM_PROPS
+};
+
+static GParamSpec *matrix_event_call_candidates_properties[NUM_PROPS];
+
+typedef struct {
+    MatrixCallCandidate** _candidates;
+    gint _candidates_len;
+} MatrixEventCallCandidatesPrivate;
+
+/**
+ * MatrixEventCallCandidates:
+ *
+ * This event is sent by callers after sending an invite and by the callee after answering.
+ * Its purpose is to give the other party additional ICE candidates to try using to communicate.
+ */
+G_DEFINE_TYPE_WITH_PRIVATE(MatrixEventCallCandidates, matrix_event_call_candidates, MATRIX_EVENT_TYPE_CALL);
+
+static void
+matrix_event_call_candidates_real_from_json(MatrixEventBase *matrix_event_base, JsonNode *json_data, GError **error)
+{
+    MatrixEventCallCandidatesPrivate *priv;
+    JsonObject *root;
+    JsonObject *content_root;
+    JsonNode *content_node;
+    JsonNode *node;
+
+    g_return_if_fail(json_data != NULL);
+
+    priv = matrix_event_call_candidates_get_instance_private(MATRIX_EVENT_CALL_CANDIDATES(matrix_event_base));
+    root = json_node_get_object(json_data);
+    content_node = json_object_get_member(root, "content");
+    content_root = json_node_get_object(content_node);
+
+    if ((node = json_object_get_member(content_root, "candidates")) != NULL) {
+        JsonArray *candidates = json_node_get_array(node);
+        gint len = json_array_get_length(candidates);
+
+        priv->_candidates = g_new(MatrixCallCandidate *, len);
+
+        for (gint i = 0; i < len; i++) {
+            JsonNode *cand_node = json_array_get_element(candidates, i);
+            JsonObject *cand_root = json_node_get_object(cand_node);
+            priv->_candidates[i] = matrix_call_candidate_new();
+
+            if ((node = json_object_get_member(cand_root, "sdpMid")) != NULL) {
+                priv->_candidates[i]->sdp_mid = g_strdup(json_node_get_string(node));
+            } else {
+                g_warning("sdpMid is missing from a candidate of a m.call.candidates event");
+            }
+
+            if ((node = json_object_get_member(cand_root, "sdpMLineIndex")) != NULL) {
+                priv->_candidates[i]->sdp_line_index = json_node_get_int(node);
+            } else {
+                g_warning("sdpMLineIndex is missing from a candidate of a m.call.candidates event");
+            }
+
+            if ((node = json_object_get_member(cand_root, "candidate")) != NULL) {
+                priv->_candidates[i]->candidate = g_strdup(json_node_get_string(node));
+            } else {
+                g_warning("candidate is missing from a candidate of a m.call.candidates event");
+            }
+        };
+    } else {
+        g_warning("content.candidates is missing from a m.call.candidates event");
+    }
+
+    MATRIX_EVENT_BASE_CLASS(matrix_event_call_candidates_parent_class)->from_json(matrix_event_base, json_data, error);
+}
+
+static void
+matrix_event_call_candidates_real_to_json(MatrixEventBase *matrix_event_base, JsonNode *json_data, GError **error)
+{
+    MatrixEventCallCandidatesPrivate *priv;
+    JsonObject *root;
+    JsonObject *content_root;
+    JsonArray *cands;
+    JsonNode *content_node;
+    JsonNode *cands_node;
+
+    g_return_if_fail(json_data != NULL);
+
+    priv = matrix_event_call_candidates_get_instance_private(MATRIX_EVENT_CALL_CANDIDATES(matrix_event_base));
+    root = json_node_get_object(json_data);
+    content_node = json_object_get_member(root, "content");
+    content_root = json_node_get_object(content_node);
+
+    if (priv->_candidates_len < 1) {
+        g_set_error(error, MATRIX_ERROR, MATRIX_ERROR_INCOMPLETE,
+                    "Won't generate a m.call.candidates event without candidates");
+
+        return;
+    }
+
+    cands = json_array_new();
+    cands_node = json_node_new(JSON_NODE_ARRAY);
+    json_node_set_array(cands_node, cands);
+    json_object_set_member(content_root, "candidates", cands_node);
+
+    for (gint i = 0; i < priv->_candidates_len; i++) {
+        MatrixCallCandidate *entry = priv->_candidates[i];
+        JsonObject *cand_root;
+        JsonNode *cand_node;
+
+        if (entry->sdp_mid == NULL) {
+            g_set_error(error, MATRIX_ERROR, MATRIX_ERROR_INCOMPLETE,
+                        "Won't generate a m.call.candidates event with a missing sdpMid for candidates");
+
+            return;
+        }
+
+        if (entry->candidate == NULL) {
+            g_set_error(error, MATRIX_ERROR, MATRIX_ERROR_INCOMPLETE,
+                        "Won't generate a m.call.candidates event with a missing candidate for candidates");
+
+            return;
+        }
+
+        cand_root = json_object_new();
+        cand_node = json_node_new(JSON_NODE_OBJECT);
+        json_node_set_object(cand_node, cand_root);
+
+        json_object_set_string_member(cand_root, "sdpMid", entry->sdp_mid);
+        json_object_set_int_member(cand_root, "sdpMLineIndex", entry->sdp_line_index);
+        json_object_set_string_member(cand_root, "candidate", entry->candidate);
+
+        json_array_add_element(cands, cand_node);
+    }
+
+    if (json_array_get_length(cands) < 1) {
+        g_set_error(error, MATRIX_ERROR, MATRIX_ERROR_INCOMPLETE,
+                    "Won't generate a m.call.candidates event with empty candidates list");
+
+        return;
+    }
+
+    MATRIX_EVENT_BASE_CLASS(matrix_event_call_candidates_parent_class)->to_json(matrix_event_base, json_data, error);
+}
+
+MatrixEventCallCandidates *
+matrix_event_call_candidates_construct(GType object_type)
+{
+    return (MatrixEventCallCandidates *)matrix_event_call_construct(object_type);
+}
+
+/**
+ * matrix_event_call_candidates_new:
+ *
+ * Create a new #MatrixEventCallCandidates object.
+ *
+ * Returns: (transfer full): a new #MatrixEventCallCandidates object
+ */
+MatrixEventCallCandidates *
+matrix_event_call_candidates_new(void)
+{
+    return matrix_event_call_candidates_construct(MATRIX_EVENT_TYPE_CALL_CANDIDATES);
+}
+
+/**
+ * matrix_event_call_candidates_get_candidates:
+ * @event: a #MatrixEventCallCandidates:
+ * @n_candidates: (nullable): placeholder for the length of the list, or %NULL to ignore
+ *
+ * Get the list of the candidates from @event.
+ *
+ * The returned value is owned by @event, and should not be freed.
+ *
+ * Returns: (transfer none) (nullable): the list of candidates
+ */
+MatrixCallCandidate **
+matrix_event_call_candidates_get_candidates(MatrixEventCallCandidates *matrix_event_call_candidates, int *n_candidates)
+{
+    MatrixEventCallCandidatesPrivate *priv;
+
+    g_return_val_if_fail(matrix_event_call_candidates != NULL, NULL);
+
+    priv = matrix_event_call_candidates_get_instance_private(matrix_event_call_candidates);
+
+    if (n_candidates != NULL) {
+        *n_candidates = priv->_candidates_len;
+    }
+
+    return priv->_candidates;
+}
+
+/**
+ * matrix_event_call_candidates_set_candidates:
+ * @event: a #MatrixEventCallCandidates
+ * @candidates: a list of #MatrixCallCandidate objects
+ * @n_candidates: the number of elements in @candidates
+ *
+ * Set the list of call candidates in @event.
+ */
+void
+matrix_event_call_candidates_set_candidates(MatrixEventCallCandidates *matrix_event_call_candidates, MatrixCallCandidate **candidates, int n_candidates)
+{
+    MatrixEventCallCandidatesPrivate *priv;
+
+    g_return_if_fail(matrix_event_call_candidates != NULL);
+
+    priv = matrix_event_call_candidates_get_instance_private(matrix_event_call_candidates);
+
+    for (gint i = 0; i < priv->_candidates_len; i++) {
+        matrix_call_candidate_unref(priv->_candidates[i]);
+    }
+
+    g_free(priv->_candidates);
+
+    priv->_candidates = (MatrixCallCandidate **)g_new(MatrixCallCandidate, n_candidates);
+    priv->_candidates_len = n_candidates;
+
+    for (gint i = 0; i < n_candidates; i++) {
+        priv->_candidates[i] = matrix_call_candidate_ref(candidates[i]);
+    }
+}
+
+static void
+matrix_event_call_candidates_finalize(GObject *gobject)
+{
+    MatrixEventCallCandidatesPrivate *priv = matrix_event_call_candidates_get_instance_private(MATRIX_EVENT_CALL_CANDIDATES(gobject));
+
+    for (gint i = 0; i < priv->_candidates_len; i++) {
+        matrix_call_candidate_unref(priv->_candidates[i]);
+    }
+
+    g_free(priv->_candidates);
+
+    G_OBJECT_CLASS(matrix_event_call_candidates_parent_class)->finalize(gobject);
+}
+
+static void
+matrix_event_call_candidates_get_property(GObject *gobject, guint property_id, GValue *value, GParamSpec *pspec)
+{
+    MatrixEventCallCandidates *matrix_event_call_candidates = MATRIX_EVENT_CALL_CANDIDATES(gobject);
+
+    switch (property_id) {
+        case PROP_CANDIDATES:
+            g_value_set_boxed(value, matrix_event_call_candidates_get_candidates(matrix_event_call_candidates, NULL));
+
+            break;
+        default:
+            G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, property_id, pspec);
+            break;
+    }
+}
+
+static void
+matrix_event_call_candidates_set_property(GObject *gobject, guint property_id, const GValue *value, GParamSpec *pspec)
+{
+    MatrixEventCallCandidates *matrix_event_call_candidates = MATRIX_EVENT_CALL_CANDIDATES(gobject);
+
+    switch (property_id) {
+        case PROP_CANDIDATES:
+        {
+            gpointer boxed = g_value_get_boxed(value);
+
+            matrix_event_call_candidates_set_candidates(matrix_event_call_candidates, g_value_get_boxed(value), (boxed == NULL) ? 0 : g_strv_length(boxed));
+        }
+        default:
+            G_OBJECT_WARN_INVALID_PROPERTY_ID(gobject, property_id, pspec);
+
+            break;
+    }
+}
+
+static void
+matrix_event_call_candidates_class_init(MatrixEventCallCandidatesClass *klass)
+{
+    ((MatrixEventBaseClass *)klass)->from_json = matrix_event_call_candidates_real_from_json;
+    ((MatrixEventBaseClass *)klass)->to_json = matrix_event_call_candidates_real_to_json;
+    G_OBJECT_CLASS(klass)->get_property = matrix_event_call_candidates_get_property;
+    G_OBJECT_CLASS(klass)->set_property = matrix_event_call_candidates_set_property;
+    G_OBJECT_CLASS(klass)->finalize = matrix_event_call_candidates_finalize;
+
+    /**
+     * MatrixEventCallCandidates:candidates:
+     *
+     * The list of call candidates.
+     */
+    matrix_event_call_candidates_properties[PROP_CANDIDATES] = g_param_spec_boxed(
+            "candidates", "candidates", "candidates",
+            MATRIX_TYPE_CALL_CANDIDATE,
+            G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE);
+    g_object_class_install_property(G_OBJECT_CLASS(klass), PROP_CANDIDATES, matrix_event_call_candidates_properties[PROP_CANDIDATES]);
+}
+
+static void
+matrix_event_call_candidates_init(MatrixEventCallCandidates *matrix_event_call_candidates)
+{
+    MatrixEventCallCandidatesPrivate *priv = matrix_event_call_candidates_get_instance_private(matrix_event_call_candidates);
+
+    priv->_candidates = NULL;
+}

src/matrix-event-call-candidates.h

@@ -0,0 +1,56 @@
+/*
+ * 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/>.
+ */
+
+#ifndef __MATRIX_GLIB_SDK_EVENT_CALL_CANDIDATES_H__
+# define __MATRIX_GLIB_SDK_EVENT_CALL_CANDIDATES_H__
+
+# include <glib-object.h>
+# include "matrix-event-call-base.h"
+
+G_BEGIN_DECLS
+
+# define MATRIX_TYPE_CALL_CANDIDATE matrix_call_candidate_get_type()
+typedef struct _MatrixCallCandidate MatrixCallCandidate;
+
+GType matrix_call_candidate_get_type(void) G_GNUC_CONST;
+MatrixCallCandidate *matrix_call_candidate_new(void);
+MatrixCallCandidate *matrix_call_candidate_ref(MatrixCallCandidate *candidate);
+void matrix_call_candidate_unref(MatrixCallCandidate *candidate);
+const gchar *matrix_call_candidate_get_sdp_mid(MatrixCallCandidate *candidate);
+void matrix_call_candidate_set_sdp_mid(MatrixCallCandidate *candidate, const gchar *sdp_mid);
+int matrix_call_candidate_get_sdp_line_index(MatrixCallCandidate *candidate);
+void matrix_call_candidate_set_sdp_line_index(MatrixCallCandidate *candidate, int sdp_line_index);
+const gchar *matrix_call_candidate_get_candidate(MatrixCallCandidate *candidate);
+void matrix_call_candidate_set_candidate(MatrixCallCandidate *candidate, const gchar *candidate_name);
+
+#define MATRIX_EVENT_TYPE_CALL_CANDIDATES (matrix_event_call_candidates_get_type ())
+G_DECLARE_DERIVABLE_TYPE(MatrixEventCallCandidates, matrix_event_call_candidates, MATRIX_EVENT, CALL_CANDIDATES, MatrixEventCall);
+
+struct _MatrixEventCallCandidatesClass {
+    MatrixEventCallClass parent_class;
+};
+
+MatrixEventCallCandidates* matrix_event_call_candidates_new (void);
+MatrixEventCallCandidates* matrix_event_call_candidates_construct (GType object_type);
+MatrixCallCandidate* matrix_event_call_candidates_candidate_dup (const MatrixCallCandidate *event);
+MatrixCallCandidate** matrix_event_call_candidates_get_candidates (MatrixEventCallCandidates *event, int *n_candidates);
+void matrix_event_call_candidates_set_candidates (MatrixEventCallCandidates *event, MatrixCallCandidate **candidates, int n_candidates);
+
+G_END_DECLS
+
+#endif  /* __MATRIX_GLIB_SDK_EVENT_CALL_CANDIDATES_H__ */

src/matrix-event-call-candidates.vala

@@ -1,132 +0,0 @@
-/*
- * 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/>.
- */
-
-/**
- * This event is sent by callers after sending an invite and by the
- * callee after answering. Its purpose is to give the other party
- * additional ICE candidates to try using to communicate.
- */
-public class Matrix.Event.CallCandidates : Matrix.Event.Call {
-    public struct Candidate {
-        string? sdp_mid;     /// The SDP media type this candidate is
-                             /// intended for.
-        int? sdp_line_index; /// The index of the SDP 'm' line this
-                             /// candidate is intended for.
-        string? candidate;   /// The SDP 'a' line of the candidate.
-    }
-
-    /**
-     * The list of candidates.
-     */
-    public Candidate[] candidates { get; set; }
-
-    protected override void
-    from_json(Json.Node json_data)
-        throws Matrix.Error
-    {
-        var content_root = json_data.get_object()
-            .get_member("content").get_object();
-        Json.Node? node;
-
-        if ((node = content_root.get_member("candidates")) != null) {
-            _candidates = new Candidate[node.get_array().get_length()];
-
-            node.get_array().foreach_element((ary, idx, cand_node) => {
-                    var cand_root = cand_node.get_object();
-                    var cand = Candidate();
-
-                    if ((node = cand_root.get_member("sdpMid")) != null) {
-                        cand.sdp_mid = node.get_string();
-                    } else {
-                        warning("sdpMid is missing from a candidate of a m.call.candidates event");
-                    }
-
-                    if ((node = cand_root.get_member("sdpMLineIndex")) != null) {
-                        cand.sdp_line_index = (int)node.get_int();
-                    } else {
-                        warning("sdpMLineIndex is missing from a candidate of a m.call.candidates event");
-                    }
-
-                    if ((node = cand_root.get_member("candidate")) != null) {
-                        cand.candidate = node.get_string();
-                    } else {
-                        warning("candidate is missing from a candidate of a m.call.candidates event");
-                    }
-
-                    _candidates[idx] = cand;
-                });
-        } else {
-            warning("content.candidates is missing from a m.call.candidates event");
-        }
-
-        base.from_json(json_data);
-    }
-
-    protected override void
-    to_json(Json.Node json_data)
-        throws Matrix.Error
-    {
-        if (_candidates.length < 1) {
-            throw new Matrix.Error.INCOMPLETE(
-                    "Won't generate a m.call.candidates event without candidates");
-        }
-
-        var content_root = json_data.get_object()
-            .get_member("content").get_object();
-
-        var cands = new Json.Array();
-
-        foreach (var entry in _candidates) {
-            if (entry.sdp_mid == null) {
-                throw new Matrix.Error.INCOMPLETE(
-                        "Won't generate a m.call.candidates event with a missing sdpMid for candidates");
-            }
-
-            if (entry.sdp_line_index == null) {
-                throw new Matrix.Error.INCOMPLETE(
-                        "Won't generate a m.call.candidates event with a missing sdpMLineIndex for candidates");
-            }
-
-            if (entry.candidate == null) {
-                throw new Matrix.Error.INCOMPLETE(
-                        "Won't generate a m.call.candidates event with a missing candidate for candidates");
-            }
-
-            var cand_obj = new Json.Object();
-            var cand_node = new Json.Node(Json.NodeType.OBJECT);
-            cand_node.set_object(cand_obj);
-
-            cand_obj.set_string_member("sdpMid", entry.sdp_mid);
-            cand_obj.set_int_member("sdpMLineIndex", entry.sdp_line_index);
-            cand_obj.set_string_member("candidate", entry.candidate);
-
-            cands.add_element(cand_node);
-        }
-
-        if (cands.get_length() < 1) {
-            throw new Matrix.Error.INCOMPLETE(
-                    "Won't generate a m.call.candidates event with empty candidates list");
-        }
-
-        var cands_node = new Json.Node(Json.NodeType.ARRAY);
-        cands_node.set_array(cands);
-        content_root.set_member("candidates", cands_node);
-
-        base.to_json(json_data);
-    }
-}

src/matrix-event-types.c

@@ -40,6 +40,7 @@
 #include "matrix-event-call-answer.h"
 #include "matrix-event-call-hangup.h"
 #include "matrix-event-call-invite.h"
+#include "matrix-event-call-candidates.h"
 
 #include "matrix-message-text.h"
 #include "matrix-message-location.h"

vapi/c-api.vapi

@@ -287,6 +287,9 @@ namespace Matrix {
     public struct ThirdPartyInvitePublicKey {
     }
 
+    public struct CallCandidate {
+    }
+
     /* Compact classes */
     [CCode (cheader_filename = "matrix-compacts.h")]
     public abstract class JsonCompact {
@@ -879,6 +882,17 @@ namespace Matrix {
             protected override void to_json(Json.Node json_data)
             throws Matrix.Error;
         }
+
+        [CCode (cheader_filename = "matrix-event-call-candidates.h")]
+        public class CallCandidates : Call {
+            public Matrix.CallCandidate[] candidates { get; set; }
+
+            protected override void from_json(Json.Node json_data)
+                throws Matrix.Error;
+
+            protected override void to_json(Json.Node json_data)
+                throws Matrix.Error;
+        }
     }
 
     [CCode (gir_namespace = "MatrixMessage", gir_version = "0.0")]