history_internal.h
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history_internal.h
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	/*
	* Copyright 2004-2024 the Pacemaker project contributors
	*
	* The version control history for this file may have further details.
	*
	* This source code is licensed under the GNU Lesser General Public License
	* version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
	*/

	#ifndef PCMK__CRM_COMMON_HISTORY_INTERNAL__H
	#define PCMK__CRM_COMMON_HISTORY_INTERNAL__H

	#include <stdio.h> // NULL
	#include <libxml/tree.h> // xmlNode

	#include <crm/common/xml.h> // crm_element_value()
	#include <crm/common/internal.h> // pcmk__str_empty()
	#include <crm/common/xml_names_internal.h> // PCMK__XA_OPERATION_KEY

	#ifdef __cplusplus
	extern "C" {
	#endif

	/*!
	* \internal
	* \brief Get the operation key from an action history entry
	*
	* \param[in] xml Action history entry
	*
	* \return Entry's operation key
	*/
	static inline const char *
	pcmk__xe_history_key(const xmlNode *xml)
	{
	if (xml == NULL) {
	return NULL;
	} else {
	/* @COMPAT Pacemaker <= 1.1.5 did not add the key, and used the ID
	* instead. Checking for that allows us to process old saved CIBs,
	* including some regression tests.
	*/
	const char *key = crm_element_value(xml, PCMK__XA_OPERATION_KEY);

	return pcmk__str_empty(key)? pcmk__xe_id(xml) : key;
	}
	}

	#ifdef __cplusplus
	}
	#endif

	#endif // PCMK__CRM_COMMON_HISTORY_INTERNAL__H