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#include < amxmodx >
#include < amxmisc >
#include < regex >

new Regex:g_pPattern = REGEX_PATTERN_FAIL;

new Regex:g_pPatternFlags;

public plugin_init( )
{
	register_plugin( "Regex Tester", "0.0.1", "Exolent" );
	
	register_concmd( "regex_pattern", "CmdPattern", _, "<pattern>" );
	register_concmd( "regex_test", "CmdTest", _, "<test data>" );
	
	new iReturn, szError[ 128 ];
	g_pPatternFlags = regex_compile( "^^\/(.*)\/([imsx]*)$", iReturn, szError, charsmax( szError ) );
	
	if( g_pPatternFlags == REGEX_PATTERN_FAIL )
	{
		log_amx( "Error creating pattern for patterns: %s", szError );
	}
}

public CmdPattern( iPlayer, iLevel, iCID )
{
	if( !cmd_access( iPlayer, iLevel, iCID, 2 ) )
	{
		return PLUGIN_HANDLED;
	}
	
	new szPattern[ 128 ];
	read_args( szPattern, charsmax( szPattern ) );
	trim( szPattern );
	remove_quotes( szPattern );
	
	new szFlags[ 5 ];
	
	new iReturn;
	
	if( regex_match_c( szPattern, g_pPatternFlags, iReturn ) > 0 )
	{
		regex_substr( g_pPatternFlags, 1, szPattern, charsmax( szPattern ) );
		regex_substr( g_pPatternFlags, 2, szFlags, charsmax( szFlags ) );
	}
	
	new szError[ 128 ];
	g_pPattern = regex_compile( szPattern, iReturn, szError, charsmax( szError ), szFlags );
	
	if( g_pPattern == REGEX_PATTERN_FAIL )
	{
		console_print( iPlayer, "Error with pattern: %s", szError );
	}
	else
	{
		console_print( iPlayer, "Pattern set to: %s", szPattern );
		console_print( iPlayer, "Flags set to: %s", szFlags );
	}
	
	return PLUGIN_HANDLED;
}

public CmdTest( iPlayer, iLevel, iCID )
{
	if( !cmd_access( iPlayer, iLevel, iCID, 2 ) )
	{
		return PLUGIN_HANDLED;
	}
	
	if( g_pPattern == REGEX_PATTERN_FAIL )
	{
		console_print( iPlayer, "No pattern set. Use regex_pattern first." );
		return PLUGIN_HANDLED;
	}
	
	new szData[ 256 ];
	read_args( szData, charsmax( szData ) );
	trim( szData );
	remove_quotes( szData );
	
	new iReturn;
	if( regex_match_c( szData, g_pPattern, iReturn ) != -2 )
	{
		console_print( iPlayer, "%d matches", iReturn );
		
		for( new i = 0; i < iReturn; i++ )
		{
			regex_substr( g_pPattern, i, szData, charsmax( szData ) );
			
			console_print( iPlayer, "%d. ^"%s^"", ( i + 1 ), szData );
		}
	}
	else
	{
		console_print( iPlayer, "Regex match error code %d", iReturn );
	}
	
	return PLUGIN_HANDLED;
}