/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2008, Eliel C. Sardanons (LU1ALY) <eliels@gmail.com>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

#ifndef _ASTERISK_XMLDOC_H
#define _ASTERISK_XMLDOC_H

/*! \file
 *  \brief Asterisk XML Documentation API
 */

#include "asterisk/xml.h"
#include "asterisk/stringfields.h"
#include "asterisk/strings.h"

/*! \brief From where the documentation come from, this structure is useful for
 *  use it inside application/functions/manager actions structure. */
enum ast_doc_src {
	AST_XML_DOC,            /*!< From XML documentation */
	AST_STATIC_DOC          /*!< From application/function registration */
};

#ifdef AST_XML_DOCS

struct ao2_container;
struct ast_xml_node;

/*!
 * \brief The struct to be used as the head of an ast_xml_doc_item list
 *        when being manipulated
 * \since 13.0.0
 */
AST_LIST_HEAD(ast_xml_doc_item_list, ast_xml_doc_item);

/*! \brief Struct that contains the XML documentation for a particular item.  Note
 * that this is an ao2 ref counted object.
 *
 * \note
 * Each of the ast_str objects are built from the corresponding ast_xmldoc_build_*
 * calls
 *
 * \since 11
 */
struct ast_xml_doc_item {
	/*! The syntax of the item */
	struct ast_str *syntax;
	/*! Seealso tagged information, if it exists */
	struct ast_str *seealso;
	/*! The arguments to the item */
	struct ast_str *arguments;
	/*! A synopsis of the item */
	struct ast_str *synopsis;
	/*! A description of the item */
	struct ast_str *description;
	AST_DECLARE_STRING_FIELDS(
		/*! The name of the item */
		AST_STRING_FIELD(name);
		/*! The type of the item */
		AST_STRING_FIELD(type);
		/*! Reference to another field */
		AST_STRING_FIELD(ref);
	);
	/*! The node that this item was created from. Note that the life time of
	 * the node is not tied to the lifetime of this object.
	 */
	struct ast_xml_node *node;
	/*! The next XML documentation item that matches the same name/item type */
	AST_LIST_ENTRY(ast_xml_doc_item) next;
	/*! Since tagged information, if it exists */
	struct ast_str *since;
	/*! The provided-by of the item */
	struct ast_str *provided_by;
};

/*! \brief Execute an XPath query on the loaded XML documentation
 * \param fmt The XPath query string to execute
 * \param ... Variable printf style format arguments
 * \retval An XPath results object on success
 * \retval NULL if no match found
 *
 * \since 12
 */
struct ast_xml_xpath_results *__attribute__((format(printf, 1, 2))) ast_xmldoc_query(const char *fmt, ...);

/*!
 *  \brief Get the syntax for a specified application or function.
 *  \param type Application, Function or AGI ?
 *  \param name Name of the application or function.
 *  \param module The module the item is in (optional, can be NULL)
 *  \retval NULL on error.
 *  \retval The generated syntax in a ast_malloc'ed string.
 */
char *ast_xmldoc_build_syntax(const char *type, const char *name, const char *module);

/*!
 *  \brief Parse the <see-also> node content.
 *  \param type 'application', 'function' or 'agi'.
 *  \param name Application or functions name.
 *  \param module The module the item is in (optional, can be NULL)
 *  \retval NULL on error.
 *  \retval Content of the see-also node.
 */
char *ast_xmldoc_build_seealso(const char *type, const char *name, const char *module);

/*!
 *  \brief Parse the <since> node content.
 *  \param type 'application', 'function' or 'agi'.
 *  \param name Application or functions name.
 *  \param module The module the item is in (optional, can be NULL)
 *  \retval NULL on error.
 *  \retval Content of the since node.
 */
char *ast_xmldoc_build_since(const char *type, const char *name, const char *module);

/*!
 *  \brief Generate the [arguments] tag based on type of node ('application',
 *         'function' or 'agi') and name.
 *  \param type 'application', 'function' or 'agi' ?
 *  \param name Name of the application or function to build the 'arguments' tag.
 *  \param module The module the item is in (optional, can be NULL)
 *  \retval NULL on error.
 *  \retval Output buffer with the [arguments] tag content.
 */
char *ast_xmldoc_build_arguments(const char *type, const char *name, const char *module);

/*!
 * \brief Generate the [final response] tag based on type of node ('application',
 *        'function' or 'agi') and name.
 *
 * \param type 'application', 'function' or 'agi'
 * \param name Name of the application or function to build the 'responses' tag.
 * \param module The module the item is in (optional, can be NULL)
 *
 * \return An XMLDoc item list with the [final response] tag content.
 *
 * \since 13.0.0
 */
struct ast_xml_doc_item *ast_xmldoc_build_final_response(const char *type, const char *name, const char *module);

/*!
 * \brief Generate the [list responses] tag based on type of node ('application',
 *        'function' or 'agi') and name.
 *
 * \param type 'application', 'function' or 'agi'
 * \param name Name of the application or function to build the 'responses' tag.
 * \param module The module the item is in (optional, can be NULL)
 *
 * \return An XMLDoc item list with the [list responses] tag content.
 *
 * \since 13.0.0
 */
struct ast_xml_doc_item *ast_xmldoc_build_list_responses(const char *type, const char *name, const char *module);

/*!
 *  \brief Colorize and put delimiters (instead of tags) to the xmldoc output.
 *  \param bwinput Not colorized input with tags.
 *  \param withcolors Result output with colors.
 *  \retval NULL on error.
 *  \retval New malloced buffer colorized and with delimiters.
 */
char *ast_xmldoc_printable(const char *bwinput, int withcolors);

/*!
 *  \brief Generate synopsis documentation from XML.
 *  \param type The source of documentation (application, function, etc).
 *  \param name The name of the application, function, etc.
 *  \param module The module the item is in (optional, can be NULL)
 *  \retval NULL on error.
 *  \retval A malloc'ed string with the synopsis.
 */
char *ast_xmldoc_build_synopsis(const char *type, const char *name, const char *module);

/*!
 *  \brief Generate provided-by documentation from XML.
 *  \param type The source of documentation (application, function, etc).
 *  \param name The name of the application, function, etc.
 *  \param module The module the item is in (optional, can be NULL)
 *  \retval NULL on error.
 *  \retval A malloc'ed string with the provided-by.
 *
 *  \note The value actually comes from the "module" attribute.
 */
char *ast_xmldoc_build_provided_by(const char *type, const char *name, const char *module);

/*!
 *  \brief Generate description documentation from XML.
 *  \param type The source of documentation (application, function, etc).
 *  \param name The name of the application, function, etc.
 *  \param module The module the item is in (optional, can be NULL)
 *  \retval NULL on error.
 *  \retval A malloc'ed string with the formatted description.
 */
char *ast_xmldoc_build_description(const char *type, const char *name, const char *module);

/*!
 *  \brief Build the documentation for a particular source type
 *  \param type The source of the documentation items (application, function, etc.)
 *
 *  \retval NULL on error
 *  \retval An ao2_container populated with ast_xml_doc instances for each item
 *  that exists for the specified source type
 *
 *  \since 11
 */
struct ao2_container *ast_xmldoc_build_documentation(const char *type);

/*!
 *  \brief Regenerate the documentation for a particular item
 *  \param item The documentation item to regenerate
 *
 *  \retval -1 on error
 *  \retval 0 on success
 *
 *  \since 12
 */
int ast_xmldoc_regenerate_doc_item(struct ast_xml_doc_item *item);

#endif /* AST_XML_DOCS */

#endif /* _ASTERISK_XMLDOC_H */
