+/*
+ * Copyright (c) 2018, JANET(UK)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of JANET(UK) nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+#include <talloc.h>
+#include <tr_name_internal.h>
+
+#include <mon_internal.h>
+
+/* Monitoring response message common code */
+
+/**
+ * Destructor used by talloc to ensure proper cleanup
+ */
+static int mon_resp_destructor(void *object)
+{
+ MON_RESP *resp = talloc_get_type_abort(object, MON_RESP);
+ /* free the message */
+ if (resp->message) {
+ tr_free_name(resp->message);
+ }
+ /* free the payload */
+ if (resp->payload) {
+ json_decref(resp->payload);
+ }
+ return 0;
+}
+
+/**
+ * Allocate a new monitoring response
+ *
+ * Caller must free using mon_resp_free().
+ *
+ * Makes its own copy of the message, so caller can dispose of
+ * that after allocating the response.
+ *
+ * Increments the reference count of the payload if it is not null.
+ *
+ * @param mem_ctx talloc context for allocation
+ * @param req MON_REQ this response corresponds to
+ * @param code numeric response code
+ * @param msg string description of response code
+ * @param payload JSON object to be send as payload, or null for no payload
+ * @return response allocated in the requested talloc context, null on failure
+ */
+MON_RESP *mon_resp_new(TALLOC_CTX *mem_ctx, MON_RESP_CODE code, const char *msg, json_t *payload)
+{
+ MON_RESP *resp = talloc(mem_ctx, MON_RESP);
+ if (resp) {
+ resp->code = code;
+ resp->message = tr_new_name(msg);
+
+ resp->payload = payload;
+ if (resp->payload)
+ json_incref(resp->payload);
+
+ talloc_set_destructor((void *)resp, mon_resp_destructor);
+ if (resp->message == NULL) {
+ talloc_free(resp); // destructor will be called
+ resp = NULL;
+ }
+ }
+ return resp;
+}
+
+/**
+ * Set or replace the response message
+ *
+ * Does not change the message if it fails
+ *
+ * @param resp
+ * @param new_msg
+ * @return 1 on success, 0 on error
+ */
+int mon_resp_set_message(MON_RESP *resp, const char *new_msg)
+{
+ TR_NAME *n = tr_new_name(new_msg);
+
+ if (n == NULL)
+ return 0; /* failed */
+
+ if (resp->message)
+ tr_free_name(resp->message);
+ resp->message = n;
+ return 1; /* succeeded */
+}
+
+/**
+ * Set or replace the payload
+ *
+ * Manages JSON reference counts
+ *
+ * @param resp
+ * @param new_payload
+ */
+void mon_resp_set_payload(MON_RESP *resp, json_t *new_payload)
+{
+ if (resp->payload)
+ json_decref(resp->payload);
+ resp->payload = new_payload;
+ if (resp->payload)
+ json_incref(new_payload);
+}
+
+/**
+ * Free a monitoring response
+ *
+ * @param resp request to free, must not be null
+ */
+void mon_resp_free(MON_RESP *resp)
+{
+ talloc_free(resp);
+}