rest: Add uri to update center

Add uri to allow the change of a center's properties such as 'name' or
'comment'

Refuse to update center's name if that name is already in use by another
center. This is because a center should not share name with another one.

src/rest.c

@@ -1733,6 +1733,99 @@ static int og_cmd_get_client_info(json_t *element,
 	return 0;
 }
 
+static int og_cmd_post_center_update(json_t *element,
+				     struct og_msg_params *params)
+{
+	const char *key, *msglog;
+	struct og_dbi *dbi;
+	dbi_result result;
+	json_t *value;
+	int err = 0;
+	unsigned int center_id;
+
+	json_object_foreach(element, key, value) {
+		if (!strcmp(key, "name")) {
+			err = og_json_parse_string(value, &params->name);
+			params->flags |= OG_REST_PARAM_NAME;
+		} else if (!strcmp(key, "comment")) {
+			err = og_json_parse_string(value, &params->comment);
+		} else if (!strcmp(key, "id")) {
+			err = og_json_parse_uint(value, &center_id);
+			params->flags |= OG_REST_PARAM_CENTER;
+		}
+
+		if (err < 0)
+			return err;
+	}
+
+	if (!og_msg_params_validate(params, OG_REST_PARAM_CENTER | OG_REST_PARAM_NAME))
+		return -1;
+	if (!params->comment)
+		params->comment = "";
+
+	dbi = og_dbi_open(&ogconfig.db);
+	if (!dbi) {
+		syslog(LOG_ERR, "cannot open conection database (%s:%d)\n",
+		       __func__, __LINE__);
+		return -1;
+	}
+
+	result = dbi_conn_queryf(dbi->conn,
+			 "SELECT idcentro FROM centros WHERE idcentro='%u'",
+			 center_id);
+	if (!result) {
+		dbi_conn_error(dbi->conn, &msglog);
+		syslog(LOG_ERR, "failed to query database (%s:%d) %s\n",
+		       __func__, __LINE__, msglog);
+		og_dbi_close(dbi);
+		return -1;
+	}
+	if (dbi_result_get_numrows(result) == 0) {
+		syslog(LOG_ERR, "could not find a center with that id: %u\n",
+		       center_id);
+		dbi_result_free(result);
+		og_dbi_close(dbi);
+		return -1;
+	}
+	dbi_result_free(result);
+
+	result = dbi_conn_queryf(dbi->conn,
+			 "SELECT nombrecentro FROM centros WHERE nombrecentro='%s'",
+			 params->name);
+	if (!result) {
+		dbi_conn_error(dbi->conn, &msglog);
+		syslog(LOG_ERR, "failed to query database (%s:%d) %s\n",
+		       __func__, __LINE__, msglog);
+		og_dbi_close(dbi);
+		return -1;
+	}
+	if (dbi_result_get_numrows(result) != 0) {
+		syslog(LOG_ERR, "a center with that name already exists: %s\n",
+		       params->name);
+		dbi_result_free(result);
+		og_dbi_close(dbi);
+		return -1;
+	}
+	dbi_result_free(result);
+
+	result = dbi_conn_queryf(dbi->conn,
+				 "UPDATE centros"
+				 " SET nombrecentro='%s',"
+				 "  comentarios='%s'"
+				 " WHERE idcentro='%u';",
+				params->name, params->comment, center_id);
+	if (!result) {
+		dbi_conn_error(dbi->conn, &msglog);
+		syslog(LOG_ERR, "failed to update center in database (%s:%d) %s\n",
+		       __func__, __LINE__, msglog);
+		og_dbi_close(dbi);
+		return -1;
+	}
+	dbi_result_free(result);
+
+	return 0;
+}
+
 static int og_cmd_post_client_update(json_t *element,
 				     struct og_msg_params *params,
 				     char *buffer_reply)
@@ -6904,6 +6997,7 @@ struct {
 	[OG_URI_OGLIVE_LIST]	= { "oglive/list", },
 	[OG_URI_OGLIVE_SET]	= { "oglive/set", },
 	[OG_URI_CENTER_ADD]	= { "center/add", },
+	[OG_URI_CENTER_UPDATE]	= { "center/update", },
 	[OG_URI_CENTER_DELETE]	= { "center/delete", },
 	[OG_URI_ROOM_ADD]	= { "room/add", },
 	[OG_URI_ROOM_DELETE]	= { "room/delete", },
@@ -7574,6 +7668,19 @@ int og_client_state_process_payload_rest(struct og_client *cli)
 			goto err_process_rest_payload;
 		}
 		err = og_cmd_post_center_delete(root, &params);
+	} else if (!strncmp(cmd, "center/update", strlen("center/update"))) {
+		if (method != OG_METHOD_POST) {
+			err = og_client_method_not_found(cli);
+			goto err_process_rest_payload;
+		}
+
+		if (!root) {
+			syslog(LOG_ERR,
+			       "command center update with no payload\n");
+			err = og_client_bad_request(cli);
+			goto err_process_rest_payload;
+		}
+		err = og_cmd_post_center_update(root, &params);
 	} else if (!strncmp(cmd, "room/add",
 			    strlen("room/add"))) {
 		if (method != OG_METHOD_POST) {

src/rest.h

@@ -126,6 +126,7 @@ enum og_rest_uri {
 	OG_URI_OGLIVE_LIST,
 	OG_URI_OGLIVE_SET,
 	OG_URI_CENTER_ADD,
+	OG_URI_CENTER_UPDATE,
 	OG_URI_CENTER_DELETE,
 	OG_URI_ROOM_ADD,
 	OG_URI_ROOM_DELETE,