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#!/usr/bin/php
<?php
// TODO Get rid of interactive merging
require_once(dirname(__FILE__).'/shared/include/includes.php'); // USE __DIR__ in 5.3.0
require_once(SHARED.'/config.php');
require_once(SHARED.'/include/dbinit.php');
function prompt_bool($prompt, $default=true) {
	$yes=$default?'Y':'y';
	$no=$default?'n':'N';
	while (true) {
		echo trim($prompt)." [$yes/$no] ";
		$answer=trim(fgets(STDIN));
		if (strlen($answer) == 0) {
			return $default;
		}
		if (strtolower(substr($answer, 0, 1)) == 'y') {
			return true;
		} elseif (strtolower(substr($answer, 0, 1)) == 'n') {
			return false;
		} else {
			echo "Please respond yes or no.\n";
		}
	}
}
function prompt_string($prompt, $default=null) {
	echo $prompt.' '.($default?"[$default] ":'');
	$answer=trim(fgets(STDIN));
	if (strlen($answer) == 0) {
		if ($default) {
			return $default;
		}
	}
	return $answer;
}
function write_table_class_to_file($table, $class, $file) {
	$stream=fopen($file, 'w');
	fputs($stream, "<?php\n");
	$tmpclass='genclass_'.randstring(30);
	eval ("class $tmpclass extends ".(class_exists($class)?get_parent_class($class):'sql_row_obj')." {\nprotected \$table='$table';\t}");
	$obj=new $tmpclass();
	fputs($stream, str_replace($tmpclass, $class, $obj->to_php()));
	fputs($stream, "?>\n");
	fclose($stream);
}
$r=query('SHOW TABLES');
$tables=$r->fetchAll(PDO::FETCH_COLUMN);
$check_existing=prompt_bool('Check existing classes for changes from the database?');
foreach ($tables as $i => $table) {
	if ($class=sql_row_obj::table_to_class($table)) {
		unset($tables[$i]);
		if (!$check_existing) {
			continue;
		}
		if (substr($class, 0, 4) == 'sql_') {
			$origfile=substr($class, 4);
		} else {
			$origfile=$class;
		}
		$origfile=SHARED.'/classes/'.$origfile.'.php';
		if (is_file($origfile)) {
			write_table_class_to_file($table, $class, '.temp_class');
			$lines=count(explode("\n", rtrim(file_get_contents('.temp_class'))))-2;
			$diff=`diff "$origfile" .temp_class`;
			$difftmp=fopen('.temp_diff', 'w');
			$diffname='.temp_diff';
			$domerge=false;
			foreach (explode("\n", $diff) as $line) {
				$line.="\n";
				if (strlen($line) && is_numeric(substr($line, 0, 1))) {
					if (preg_match('/^[0-9]+(?:,[0-9]+)?[a-zA-Z](?:[0-9]+,)?([0-9]+)?\s/', $line, $match)) {
						$endl=$match[1];
						if ($endl > $lines-3) {
							break;
						}
					}
				}
				if (strlen(trim($line))) {
					$domerge=true;
				}
				fputs($difftmp, $line);
			}
			fclose($difftmp);
			if ($domerge) {
				copy($origfile, '.temp_class');
				shell_exec('patch .temp_class < .temp_diff');
				passthru('colordiff -u "'.$origfile.'" .temp_class');
				if (prompt_bool('Keep changes?')) {
					rename('.temp_class', $origfile);
				}
			}
			unlink('.temp_diff');
			if (is_file('.temp_class'))
				unlink('.temp_class'); // TODO unlink others
		}
	}
}
if ($tables) {
	echo 'Found table(s) without corresponding class: '.implode(', ', $tables)."\n";
	if (!prompt_bool('Generate classes for these tables?')) {
		unset($tables);
	}
} else {
	echo "No tables found without corresponding classes.\n";
}
if (!$tables) {
	die("Exiting.\n");
	/*
	echo 'Which tables should we generate classes for? (space-separated) ';
	$tables=explode(' ', trim(fgets(STDIN)));
	if ($tables[0] == '') {
		echo "Exiting.\n";
		exit;
	}
	 */
}
echo 'Generating classes for table(s): '.implode(', ', $tables)."\n";
foreach ($tables as $table) {
	$default='sql_';
	if (substr($table, -1) == 's') {
		$default.=substr($table, 0, strlen($table)-1);
	} else {
		$default.=$table;
	}
	$class=prompt_string('Class name for table '.$table.':', $default);
	if (substr($class, 0, 4) == 'sql_') {
		$default=substr($class, 4);
	} else {
		$default=$class;
	}
	$default.='.php';
	$file=SHARED.'/classes/'.prompt_string('Filename for class '.$class.': '.SHARED.'/classes/', $default);
	if (is_file($file)) {
		if (!prompt_bool($file.' exists. Overwrite?', false)) {
			echo 'Skipping table '.$table."\n";
			continue;
		}
	}
	echo 'Writing '.$file.'...';
	write_table_class_to_file($table, $class, $file);
	echo "done\n";
}
?>