root/namespace-unused @ 1509

#!/usr/bin/php
<?php
if(!isset($_SERVER['argv'][1]) || in_array($_SERVER['argv'][1], array('--help', '-h', '-?'))) {
        help();
        exit;
}
$dir = $_SERVER['argv'][1];
$pattern = isset($_SERVER['argv'][2]) ? $_SERVER['argv'][2] : '/\.php$/';

$ite = new RecursiveDirectoryIterator($dir);
foreach (new RecursiveIteratorIterator($ite) as $filename => $cur) {
        if(preg_match($pattern, $filename)) {
                updateFile($filename);
        }
}


function updateFile($filename) {
        echo $filename;

        $block = file($filename);
        $useblock = array();
        $i = 0;
        foreach($block as $line) {
                if(preg_match('/^use .*(?: |\\\)([a-zA-Z]+);$/', $line, $res)) {
                        $useblock[$i] = $res[1];
                }
                $i++;
        }
        $flipped = array_flip($useblock);
        
        if($useblock) {
                $regexp = '/(?:new ('.implode("|", $useblock).')(?: |\()'.
                        '|('.implode("|", $useblock).')::[^\W]+'.
                        '|(?:extends|implements) ('.implode("|", $useblock).')(?: |$)'.
                        '|(?:catch \(('.implode("|", $useblock).') )'.
                ')/';
                preg_match_all($regexp, implode("", $block), $res);
                if($res) {
                        $res = array_merge((array)$res[1], (array)$res[2], (array)$res[3], (array)$res[4]);
                        foreach($res as $className) {
                                if(!isset($flipped[$className])) {
                                        continue;
                                }
                                $idx = $flipped[$className];
                                unset($useblock[$idx]);
                        }
                }
                if($useblock) {
                        foreach($useblock as $idx => $line) {
                                unset($block[$idx]);
                        }
                }
        }

        if($useblock) {
                file_put_contents($filename, implode("", $block));
                echo "\tchanged\n";
        } else {
                echo "\tunchanged\n";
        }
}

function help() {
        echo "removes unused use clauses";
        echo "\n";
        echo "Usage: " . basename($_SERVER['argv'][0]) . " folder [--help]\n";
        echo "\n";
        echo "The options are as follows:\n";
        echo "  -?, --help\n";
        echo "    Show this help and exit.\n\n";
}