add: pulse endpoint

src/command.c

@@ -139,3 +139,47 @@ command_send(controller_t *controller, int command_code, char *payload, uint32_t
     close(fd_controller);
     return 0;
 }
+
+int
+command_pulse(relay_t *relay, uint8_t duration)
+{
+    controller_t *controller = controller_get_by_id(relay->controller_id);
+    if(!controller)
+    {
+        LOG_ERROR("couldn't find controller\n");
+        return 1;
+    }
+
+    char* payload;
+    size_t payload_size;
+    mpack_writer_t writer;
+    mpack_writer_init_growable(&writer, &payload, &payload_size);
+
+    // 3 = code, relay num, relay name, schedules(array)
+    mpack_start_map(&writer, 3);
+
+    mpack_write_uint(&writer, COMMAND_MAPPING_CODE);
+    mpack_write_u8(&writer, COMMAND_CODE_PULSE);
+
+    mpack_write_uint(&writer, COMMAND_MAPPING_RELAY_NUM);
+    mpack_write_u8(&writer, relay->number);
+
+    mpack_write_uint(&writer, COMMAND_MAPPING_PULSE_DURATION);
+    mpack_write_u8(&writer, duration);
+
+    mpack_finish_map(&writer);
+
+    // finish writing
+    if (mpack_writer_destroy(&writer) != mpack_ok)
+    {
+        LOG_ERROR("an error occurred encoding the data");
+        controller_free(controller);
+        return 1;
+    }
+
+    int result = command_send(controller, COMMAND_CODE_PULSE, payload, payload_size);
+
+    controller_free(controller);
+    free(payload);
+    return result;
+}