/******************************************************************************
 *  swmgr.h   - definition of class SWMgr used to interact with an install
 *				base of sword modules.
 *
 * $Id: swmgr.h 2340 2009-04-26 13:51:42Z scribe $
 *
 * Copyright 1998-2008 CrossWire Bible Society (http://www.crosswire.org)
 *	CrossWire Bible Society
 *	P. O. Box 2528
 *	Tempe, AZ  85280-2528
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation version 2.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 */

/** @mainpage The SWORD Project - API documentation
 * This is the API documentation for The SWORD Project.
 * It describes the structure of the SWORD library and documents the functions of the classes.
 * From time to time this documentation gives programming examples, too.
 *
 * SWORD provides a simple to use engine for working with many types of texts including Bibles,
 *	commentaries, lexicons, glossaries, daily devotionals, and others.
 *
 * Some main classes:
 *
 * SWMgr gives access to an installed library of modules (books).
 * SWModule represents an individual module
 * SWKey represents a location into a module (e.g. "John 3:16")
 *
 * An API Primer can be found at:
 *
 * http://crosswire.org/sword/develop/swordapi/apiprimer.jsp
 *
 * If you're interested in working on a client which uses SWORD, please first have a look at
 *	some of the existing ones.  They can always use help, and will also prove to be good examples
 *	if you decide to start a new project.
 *
 * Well known frontends are:\n
 *	-BibleTime (http://www.bibletime.info)\n
 *	-BPBible (http://bpbible.com)\n
 *	-MacSword (http://www.macsword.com)\n
 *	-Xiphos (http://xiphos.org)\n
 *	-SWORD for Windows (http://crosswire.org/sword/software/biblecs/)\n
 */

#ifndef SWMGR_H
#define SWMGR_H

#include <map>
#include <list>
#include <swbuf.h>
#include <swconfig.h>

#include <defs.h>

SWORD_NAMESPACE_START

class SWModule;
class SWFilter;
class SWOptionFilter;
class SWFilterMgr;
class SWBuf;
class SWKey;

typedef std::map < SWBuf, SWModule *, std::less < SWBuf > >ModMap;
typedef std::map < SWBuf, SWFilter * >FilterMap;
typedef std::map < SWBuf, SWOptionFilter * >OptionFilterMap;
typedef std::list < SWBuf >StringList;
typedef std::list < SWFilter* >FilterList;
typedef std::list < SWOptionFilter* >OptionFilterList;

class FileDesc;
class SWOptionFilter;

/** SWMgr exposes an installed module set
 *
 * SWMgr exposes an installed module set and can be asked to configure the desired
 *	markup and options which modules will produce.
 *
 * @version $Id: swmgr.h 2340 2009-04-26 13:51:42Z scribe $
 */
class SWDLLEXPORT SWMgr {


private:
	bool mgrModeMultiMod;
	bool augmentHome;
	void commonInit(SWConfig *iconfig, SWConfig *isysconfig, bool autoload, SWFilterMgr *filterMgr, bool multiMod = false);

protected:
	SWFilterMgr *filterMgr;		//made protected because because BibleTime needs it
	SWConfig *myconfig;		//made protected because because BibleTime needs it
	SWConfig *mysysconfig;
	SWConfig *homeConfig;
	void CreateMods(bool multiMod = false);
	SWModule *CreateMod(const char *name, const char *driver, ConfigEntMap &section);
	void DeleteMods();
	char configType;		// 0 = file; 1 = directory
	OptionFilterMap optionFilters;
	FilterMap cipherFilters;
	SWFilter *gbfplain;
	SWFilter *thmlplain;
	SWFilter *osisplain;
	SWFilter *teiplain;
	SWOptionFilter *transliterator;
	FilterList cleanupFilters;
	StringList options;
	virtual void init(); // use to initialize before loading modules
	virtual char AddModToConfig(FileDesc *conffd, const char *fname);
	virtual void loadConfigDir(const char *ipath);
	virtual void AddGlobalOptions(SWModule *module, ConfigEntMap &section, ConfigEntMap::iterator start, ConfigEntMap::iterator end);
	virtual void AddLocalOptions(SWModule *module, ConfigEntMap &section, ConfigEntMap::iterator start, ConfigEntMap::iterator end);
	StringList augPaths;

	/**
	 * Called to add appropriate Encoding Filters to a module.  Override to do special actions,
	 *	if desired.	See the module.conf Encoding= entry.
	 * @param module module to which to add Encoding Filters
	 * @param section configuration information from module.conf
	 */
	virtual void AddEncodingFilters(SWModule *module, ConfigEntMap &section);

	/**
	 * Called to add appropriate Render Filters to a module.  Override to do special actions,
	 *	if desired.	See the module.conf SourceType= entry.
	 * @param module module to which to add Render Filters
	 * @param section configuration information from module.conf
	 */
	virtual void AddRenderFilters(SWModule *module, ConfigEntMap &section);

	/**
	 * Called to add appropriate Strip Filters to a module.  Override to do special actions,
	 *	if desired.	See the module.conf SourceType= entry.
	 * @param module module to which to add Strip Filters
	 * @param section configuration information from module.conf
	 */
	virtual void AddStripFilters(SWModule *module, ConfigEntMap &section);

	// ones manually specified in .conf file
	virtual void AddStripFilters(SWModule *module, ConfigEntMap &section, ConfigEntMap::iterator start, ConfigEntMap::iterator end);

	/**
	 * Called to add appropriate Raw Filters to a module.  Override to do special actions,
	 *	if desired.	See the module.conf CipherKey= entry.
	 * @param module module to which to add Raw Filters
	 * @param section configuration information from module.conf
	 */
	virtual void AddRawFilters(SWModule *module, ConfigEntMap &section);


public:

	static bool isICU;
	static const char *globalConfPath;
	static SWBuf getHomeDir();

	/**
	 *
	 */
	static void findConfig(char *configType, char **prefixPath, char **configPath, StringList *augPaths = 0, SWConfig **providedSysConf = 0);

	SWConfig *config;
	SWConfig *sysConfig;

	/** The path to main module set and locales
	 */
	char *prefixPath;

	/** path to main module set configuration 
	 */
	char *configPath;

	/** The map of available modules.
	 *	This map exposes the installed modules.
	 *	Here's an example how to iterate over the map and check the module type of each module.
	 *
	 *@code
	 * ModMap::iterator it;
	 * SWModule *curMod = 0;
	 *
	 * for (it = Modules.begin(); it != Modules.end(); it++) {
	 *      curMod = (*it).second;
	 *      if (!strcmp(curMod->Type(), "Biblical Texts")) {
	 *           // do something with curMod
	 *      }
	 *      else if (!strcmp(curMod->Type(), "Commentaries")) {
	 *           // do something with curMod
	 *      }
	 *      else if (!strcmp(curMod->Type(), "Lexicons / Dictionaries")) {
	 *           // do something with curMod
	 *      }
	 * }
	 * @endcode
	 */
	ModMap Modules;

	/** Gets a specific module by name.  e.g. SWModule *kjv = myManager.getModule("KJV");
	 * @param modName the name of the module to retrieve
	 * @return the module, if found, otherwise 0
	 */
	SWModule *getModule(const char *modName) { ModMap::iterator it = Modules.find(modName); return ((it != Modules.end()) ? it->second : 0); }
	const SWModule *getModule(const char *modName) const { ModMap::const_iterator it = Modules.find(modName); return ((it != Modules.end()) ? it->second : 0); }


	/** Constructs an instance of SWMgr
	 *
	 * @param iconfig manually supply a configuration.  If not supplied, SWMgr will look on the system
	 *	using a complex hierarchical search.  See README for detailed specifics.
	 * @param isysconfig
	 * @param autoload whether or not to immediately load modules on construction of this SWMgr.
	 *	If you reimplemented SWMgr you can set this to false and call SWMgr::Load() after you have
	 *	completed the contruction and setup of your SWMgr subclass.
	 * @param filterMgr an SWFilterMgr subclass to use to manager filters on modules
	 *	SWMgr TAKES OWNERSHIP FOR DELETING THIS OBJECT
	 *	For example, this will create an SWMgr and cause its modules to produce HTMLHREF formatted output
	 *	when asked for renderable text:
	 *
	 *	SWMgr *myMgr = new SWMgr(0, 0, true, new MarkupFilterMgr(FMT_HTMLHREF));
	 */
	SWMgr(SWConfig *iconfig = 0, SWConfig *isysconfig = 0, bool autoload = true, SWFilterMgr *filterMgr = 0, bool multiMod = false);

	/**
	 */
	SWMgr(SWFilterMgr *filterMgr, bool multiMod = false);

	/**
	 * @param iConfigPath provide a custom path to use for module set location, instead of
	 *	searching the system for it.
	 */
	SWMgr(const char *iConfigPath, bool autoload = true, SWFilterMgr *filterMgr = 0, bool multiMod = false, bool augmentHome = true);

	/** The destructor of SWMgr.
	 * This function cleans up the modules and deletes the created object.
	 * Destroying the SWMgr causes all retrieved SWModule object to be invalid, so
	 *	be sure to destroy only when retrieved objects are no longer needed.
	 */
	virtual ~SWMgr();

	/**
	 * Adds books from a new path to the library
	 * @param path the path in which to search for books
	 * @param multiMod whether or not to keep multiple copies of the same book if found in different paths
	 *		default - false, uses last found version of the book
	 */
	virtual void augmentModules(const char *path, bool multiMod = false);

	void deleteModule(const char *);

	/** Looks for any newly installed module.conf file in the path provided,
	 *	displays the copyright information to the user, and then copies the
	 *	module.conf to the main module set's mods.d directory
	 * @param dir where to search for new modules
	 */
	virtual void InstallScan(const char *dir);

	/** Load all modules.  Should only be manually called if SWMgr was constructed
	 *	without autoload; otherwise, this will be called on SWMgr construction
	 * Reimplement this function to supply special functionality when modules are
	 * initially loaded.
	 */
	virtual signed char Load();

	/** Change the values of global options (e.g. Footnotes, Strong's Number, etc.)
	 * @param option The name of the option, for which you want to change the
	 * value. Well known and often used values are "Footnotes" or "Strong's Numbers"
	 * @param value new value. Common values are "On" and "Off"
	 */
	virtual void setGlobalOption(const char *option, const char *value);

	/** Get the current value of the given option
	 * @param option the name of the option, who's value is desired
	 * @return the value of the given option
	 */
	virtual const char *getGlobalOption(const char *option);

	/** Gets a brief description for the given option
	 * @param option the name of the option, who's tip is desired
	 * @return description text
	 * @see setGlobalOption, getGlobalOption, getGlobalOptions
	 */
	virtual const char *getGlobalOptionTip(const char *option);

	/** Gets a list of all available option names
	 * @return list of option names
	 */
	virtual StringList getGlobalOptions();

	/** Gets a list of legal values to which a specific option 
	 *	may be set
	 * @param option the name of the option, who's legal values are desired
	 * @return a list of legal values for the given option
	 */
	virtual StringList getGlobalOptionValues(const char *option);

	/** Filters a buffer thru a named filter
	 * @param filterName
	 * @param text buffer to filter
	 * @param key context key if filter needs this for processing
	 * @param module context module if filter needs this for processing
	 * @return error status
	 */
	virtual char filterText(const char *filterName, SWBuf &text, const SWKey *key = 0, const SWModule *module = 0);

	/**
	 * Sets the cipher key for the given module. This function updates the key
	 * at runtime, but it does not write to the config file.
	 * To write the new unlock key to the config file use code like this:
	 *
	 * @code
	 * SectionMap::iterator section;
	 * ConfigEntMap::iterator entry;
	 * DIR *dir = opendir(configPath);
	 * struct dirent *ent;
	 * char* modFile;
	 * if (dir) {    // find and update .conf file
	 *   rewinddir(dir);
	 *   while ((ent = readdir(dir)))
	 *   {
	 *     if ((strcmp(ent->d_name, ".")) && (strcmp(ent->d_name, "..")))
	 *     {
	 *       modFile = m_backend->configPath;
	 *       modFile += "/";
	 *       modFile += ent->d_name;
	 *       SWConfig *myConfig = new SWConfig( modFile );
	 *       section = myConfig->Sections.find( m_module->Name() );
	 *       if ( section != myConfig->Sections.end() )
	 *       {
	 *         entry = section->second.find("CipherKey");
	 *         if (entry != section->second.end())
	 *         {
	 *           entry->second = unlockKey;//set cipher key
	 *           myConfig->Save();//save config file
	 *         }
	 *       }
	 *       delete myConfig;
	 *     }
	 *   }
	 * }
	 * closedir(dir);
	 * @endcode
	 *
	 * @param modName For this module we change the unlockKey
	 * @param key This is the new unlck key we use for te module.
	 */
	virtual signed char setCipherKey(const char *modName, const char *key);
};

SWORD_NAMESPACE_END
#endif