<?php
$FunctionsModule_functions = array();
$FunctionsModule_local_functions = array();
$FunctionsModule_file = '';
$FunctionsModule_instance = new FunctionsModule();

function FunctionsModule_callback_global( $object ) {
	global $FunctionsModule_functions, $FunctionsModule_file;
	$FunctionsModule_functions[$object['name']] = array(
		'used' => 0,
		'file' => $FunctionsModule_file
	);
}
function FunctionsModule_callback_local( $object ) {
	global $FunctionsModule_local_functions, $FunctionsModule_file;
	$file = $FunctionsModule_file;
	if( !isset( $FunctionsModule_local_functions[$file] ) ) {
		$FunctionsModule_local_functions[$file] = array();
	}
	$FunctionsModule_local_functions[$file][strtolower( $object['name'] )] = array(
		'used' => 0,
		'file' => $object['file']
	);
}

class FunctionsModule extends ScannerModule {
	var $include_paths;
	var $internal_functions;
	var $included_files;
	
	function FunctionsModule() {
		$this->ScannerModule();
		// Preload library function declarations
		$library_folders = array(
			'libs',
			'inc',
			'incs',
			'includes'
		);
		global $base_path;
		$parser = new PHPParser( PHPPARSER_FETCH_FUNCTIONS );
		$parser->registerCallback( 'FunctionsModule_callback_global' );
		//$parser->registerCallback( 'FunctionsModule_callback_local' );
		$this->include_paths = array();
		$paths = array();
		$path = realpath( $base_path );
		if( !in_array( $path, $paths ) ) {
			$paths[] = $path;
			$contents = scandir( $path );
			foreach( $contents as $node ) {
				if(
					is_dir( "$path/$node" )
					&& in_array( strtolower( $node ), $library_folders )
					&& !in_array( "$path/$node", $this->include_paths ) 
				) {
					$this->include_paths[] = "$path/$node";
				}
			}
		}
		$include_files = array();
		$functions = array();
		foreach( $this->include_paths as $path ) {
			exec( "find $path -iname '*.php' 2>/dev/null", $output, $result );
			$include_files = array_merge( $include_files, $output );
		}
		err( "Parsing function libraries...\n" );
		$counter = 0; $total = count( $include_files );
		foreach( $include_files as $file ) {
			$counter++;
			scan_progress( $counter, $total, 'Scanning Function Libraries [%d/%d]' );
			$parser->parseFile( $file );
		}
		$this->internal_functions = get_defined_functions();
		$this->internal_functions = $this->internal_functions['internal'];
	}
	function parserCallback( $object ) {
		global $FunctionsModule_functions;
		global $FunctionsModule_local_functions;
		global $FunctionsModule_file;
		
		$FunctionsModule_file = filename( $object['file'] );
		switch( $object['type'] ) {
			case PHPPARSER_INCLUDE:
				$this->included_files[] = $object;
				if( $object['name'] == 'global.php' ) {
					$object['name'] = 'libs/security/lib_security_input.php';
					$this->included_files[] = $object;
					$object['name'] = 'libs/get/lib_get_portal.php';
					$this->included_files[] = $object;
					$object['name'] = 'libs/logging/lib_logging_errors.php';
					$this->included_files[] = $object;
				}
				break;
			case PHPPARSER_FUNCTION_CALL:
				if( !in_array( $object['name'], array_keys( $FunctionsModule_functions ) ) ) {
					if(
						!in_array( $object['name'], $this->internal_functions )
						&& !in_array( $object['name'], array_keys( $FunctionsModule_local_functions[filename( $object['file'] )] ) )
					) {
						$this->fault( $object, FAULT_MAJOR, "Undefined function '{$object['name']}'" );
					}
					continue;
				}
				
				$include = filename( $FunctionsModule_functions[$object['name']]['file'] );
				if( $include != filename( $object['file'] ) ) {
					//$functions[$object['name']]['used']++;
					//if( !isset( $file_requires[$file]['libs'][$include] ) ) { $file_requires[$file]['libs'][$include] = array( 'lines' => array(), 'calls' => array() ); }
					//$lib =& $file_requires[$file]['libs'][$include];
	
					$bad = $warning = true;
					foreach( $this->included_files as $libinc ) {
						if( $libinc['name'] != $include || !in_array( $libinc['in_function'], array( '', $object['in_function'] ) ) ) { continue; }
						$inc = $libinc;
						$bad = false;
						$warning = !$bad && !in_array( $libinc['block'], $object['open_blocks'] );
						if( !$bad && !$warning ) { break; }
					}
					$open_blocks = is_array( $object['open_blocks'] ) ? implode( ',', $object['open_blocks'] ) : '';
					$info = "called[l={$object['line']};b={$object['block']};d={$object['depth']}]" . ( !$bad ? ", required[l={$inc['line']};b={$inc['block']};d={$inc['depth']}] open[{$open_blocks}]" : '' );
					if( $bad === true ) {
						$this->fault( $object, FAULT_MAJOR, "Undefined function '{$object['name']}' $info" );
					} elseif( $warning === true ) {
						$this->fault( $object, FAULT_MEDIUM, "Potentially undefined function '{$object['name']}' $info" );
					}
				}
				break;
		}
	}
	function preScan( $file ) {
		parent::preScan( $file );
		global $FunctionsModule_local_functions, $FunctionsModule_file;
		$FunctionsModule_file = filename( $file['filename'] );
		$FunctionsModule_local_functions = array();
		$FunctionsModule_local_functions[filename( $file['filename'] )] = array();
		$parser = new PHPParser( PHPPARSER_FETCH_FUNCTIONS );
		$parser->registerCallback( 'FunctionsModule_callback_local' );
		if( $file['revision'] > 0 ) {
			$file_contents = isset( $file['contents'] ) ? $file['contents'] : shell_exec( "svn cat -r {$file['revision']} {$svn_root}{$svn_base}/{$file['filename']} 2>/dev/null" );
			$parser->parse( $file_contents );
		} else {
			$parser->parseFile( $file['filename'] );
		}
		$this->included_files = array();
	}
}

addModule( $FunctionsModule_instance );
?>