/*
 * Copyright(c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

/*
 * Modification History
 *
 * June 1, 2001			Allan Nathanson <ajn@apple.com>
 * - public API conversion
 *
 * November 9, 2000		Allan Nathanson <ajn@apple.com>
 * - initial revision
 */

#include <SystemConfiguration/SystemConfiguration.h>
#include <SystemConfiguration/SCPrivate.h>
#include "SCPreferencesInternal.h"

#include <fcntl.h>
#include <pwd.h>
#include <unistd.h>
#include <sys/errno.h>
#include <sys/param.h>

__private_extern__ CFDataRef
__SCPSignatureFromStatbuf(const struct stat *statBuf)
{
	CFMutableDataRef	signature;
	SCPSignatureDataRef	sig;

	signature = CFDataCreateMutable(NULL, sizeof(SCPSignatureData));
	CFDataSetLength(signature, sizeof(SCPSignatureData));
	sig = (SCPSignatureDataRef)CFDataGetBytePtr(signature);
	sig->st_dev       = statBuf->st_dev;
	sig->st_ino       = statBuf->st_ino;
	sig->st_mtimespec = statBuf->st_mtimespec;
	sig->st_size      = statBuf->st_size;
	return signature;
}


__private_extern__ char *
__SCPreferencesPath(CFAllocatorRef	allocator,
		    CFStringRef		prefsID,
		    Boolean		perUser,
		    CFStringRef		user,
		    Boolean		useNewPrefs)
{
	CFStringRef	path		= NULL;
	char		*pathStr;

	if (perUser) {
		if (prefsID == NULL) {
			/* no user prefsID specified */
			return NULL;
		} else if (CFStringHasPrefix(prefsID, CFSTR("/"))) {
			/* if absolute path */
			path = CFStringCreateCopy(allocator, prefsID);
		} else {
			/*
			 * relative (to the user's preferences) path
			 */
			char		login[MAXLOGNAME+1];
			struct passwd	*pwd;

			bzero(&login, sizeof(login));
			if (user == NULL) {
				CFStringRef	u;

				/* get current console user */
				u = SCDynamicStoreCopyConsoleUser(NULL, NULL, NULL);
				if (!u) {
					/* if could not get console user */
					return NULL;
				}

				(void)_SC_cfstring_to_cstring(u, login, sizeof(login), kCFStringEncodingASCII);
				CFRelease(u);
			} else {
				/* use specified user */
				(void)_SC_cfstring_to_cstring(user, login, sizeof(login), kCFStringEncodingASCII);
			}

			/* get password entry for user */
			pwd = getpwnam(login);
			if (pwd == NULL) {
				/* if no home directory */
				return NULL;
			}

			/* create prefs ID */
			path = CFStringCreateWithFormat(allocator,
							NULL,
							CFSTR("%s/%@/%@"),
							pwd->pw_dir,
							PREFS_DEFAULT_USER_DIR,
							prefsID);
		}
	} else {
		if (prefsID == NULL) {
			/* default preference ID */
			path = CFStringCreateWithFormat(allocator,
							NULL,
							CFSTR("%@/%@"),
							useNewPrefs ? PREFS_DEFAULT_DIR    : PREFS_DEFAULT_DIR_OLD,
							useNewPrefs ? PREFS_DEFAULT_CONFIG : PREFS_DEFAULT_CONFIG_OLD);
		} else if (CFStringHasPrefix(prefsID, CFSTR("/"))) {
			/* if absolute path */
			path = CFStringCreateCopy(allocator, prefsID);
		} else {
			/* relative path */
			path = CFStringCreateWithFormat(allocator,
							NULL,
							CFSTR("%@/%@"),
							useNewPrefs ? PREFS_DEFAULT_DIR : PREFS_DEFAULT_DIR_OLD,
							prefsID);
			if (useNewPrefs && CFStringHasSuffix(path, CFSTR(".xml"))) {
				CFMutableStringRef	newPath;

				newPath = CFStringCreateMutableCopy(allocator, 0, path);
				CFStringReplace(newPath,
						CFRangeMake(CFStringGetLength(newPath)-4, 4),
						CFSTR(".plist"));
				CFRelease(path);
				path = newPath;
			}
		}
	}

	/*
	 * convert CFStringRef path to C-string path
	 */
	pathStr = _SC_cfstring_to_cstring(path, NULL, 0, kCFStringEncodingASCII);
	if (pathStr == NULL) {
		SCLog(_sc_verbose, LOG_DEBUG, CFSTR("could not convert path to C string"));
	}

	CFRelease(path);
	return pathStr;
}


CFDataRef
SCPreferencesGetSignature(SCPreferencesRef prefs)
{
	SCPreferencesPrivateRef	prefsPrivate	= (SCPreferencesPrivateRef)prefs;

	if (prefs == NULL) {
		/* sorry, you must provide a session */
		_SCErrorSet(kSCStatusNoPrefsSession);
		return NULL;
	}

	__SCPreferencesAccess(prefs);

	return prefsPrivate->signature;
}


__private_extern__ CFStringRef
_SCPNotificationKey(CFAllocatorRef	allocator,
		    CFStringRef		prefsID,
		    Boolean		perUser,
		    CFStringRef		user,
		    int			keyType)
{
	CFStringRef	keyStr;
	char		*path;
	CFStringRef	pathStr;
	CFStringRef	storeKey;

	switch (keyType) {
		case kSCPreferencesKeyLock :
			keyStr = CFSTR("lock");
			break;
		case kSCPreferencesKeyCommit :
			keyStr = CFSTR("commit");
			break;
		case kSCPreferencesKeyApply :
			keyStr = CFSTR("apply");
			break;
		default :
			return NULL;
	}

	path = __SCPreferencesPath(allocator, prefsID, perUser, user, TRUE);
	if (path == NULL) {
		return NULL;
	}

	pathStr = CFStringCreateWithCStringNoCopy(allocator,
						  path,
						  kCFStringEncodingASCII,
						  kCFAllocatorNull);

	storeKey = CFStringCreateWithFormat(allocator,
					    NULL,
					    CFSTR("%@%@:%@"),
					    kSCDynamicStoreDomainPrefs,
					    keyStr,
					    pathStr);

	CFRelease(pathStr);
	CFAllocatorDeallocate(NULL, path);
	return storeKey;
}


CFStringRef
SCDynamicStoreKeyCreatePreferences(CFAllocatorRef	allocator,
				   CFStringRef		prefsID,
				   SCPreferencesKeyType	keyType)
{
	return _SCPNotificationKey(allocator, prefsID, FALSE, NULL, keyType);
}


CFStringRef
SCDynamicStoreKeyCreateUserPreferences(CFAllocatorRef		allocator,
				       CFStringRef		prefsID,
				       CFStringRef		user,
				       SCPreferencesKeyType	keyType)
{
	return _SCPNotificationKey(allocator, prefsID, TRUE, user, keyType);
}