recursive todo script (verypositive software)

todo.php

<?
	
	$fp = fopen('todo.tsv', 'r');
	while ($line = fgetcsv($fp, 0, "\t")) {
		
		foreach ($line as &$li) $li = trim($li);
		unset($li);
		
		if ($line[1]) {
			$items[$line[1]] = array(
				'tag' => $line[1],
				'desc' => $line[3],
				'deps' => $line[2] ? explode(',', $line[2]) : array(),
				'done' => strpos($line[0], '@') !== false,
				'prio' => max(trim($line[0], '@'), 1),
				'allows' => array(),
				'unsat' => array(),
			);
			$lastt = $line[1];
		}
		else {
			$items[$lastt]['desc'] = trim($items[$lastt]['desc']."\n".$line[3]);
		}
		
	}
	
	function deps($tag, $done, $dep, $add) {
		global $items;
		
		$done[$tag]++;
		
		if (!$items[$tag]['tag']) {
			$items[$tag]['tag'] = $tag;
			$items[$tag]['desc'] = "Orphan $tag";
			$items[$tag]['prio'] += 1;
			$items[$tag]['deps'] = array();
		}
		
		if ($items[$tag]['done'])
			return;
			
		foreach ($items[$tag]['deps'] as $dtag) {
			if ($done[$dtag]) {
				echo 'Circular!';
				print_r($done);
			}
			if (!$items[$dtag]['allows'][$dep]++) {
// 				echo str_repeat(' ', count($done))."$tag	$dtag	".$items[$dtag]['prio']." + ".$add.".\n";
				$items[$dtag]['prio'] += $add; //Suspiciously simple
				deps($dtag, $done, $dep, $add);
			}
		}
	}
	
 	foreach ($items as $tag => $item) {
		foreach ($item['deps'] as $dtag) {
			if (!$items[$dtag]['done'])
				$items[$tag]['unsat'][$dtag]++; //TODO recursive
		}
		deps($tag, array($tag => 1), $tag, $item['prio']);
 	}
 	
 	usort($items, function ($a, $b) {
		if (count($a['unsat']) != count($b['unsat']))
			return count($a['unsat']) > count($b['unsat']);
		if ($a['prio'] != $b['prio'])
			return $a['prio'] < $b['prio'];
		return count($a['deps']) > count($b['deps']);
 	});

	foreach ($items as $item) {
	
		if ($item['done'])
			continue;
		
		echo "$item[desc]\n"
			."  ".$item[tag]."\n";
			
		if ($item['allows'])
			echo "  -> ".implode(' ', array_keys($item['allows']))."\n";
		
		if ($item['unsat'])
			echo "  <= ".implode(' ', array_keys($item['unsat']))."\n";
		
		echo "\n";
			
	}