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|
<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\event;
/**
* Class php_exporter
* Crawls through a list of files and grabs all php-events
*/
class php_exporter
{
/** @var string Path where we look for files*/
protected $path;
/** @var string phpBB Root Path */
protected $root_path;
/** @var string */
protected $current_file;
/** @var string */
protected $current_event;
/** @var int */
protected $current_event_line;
/** @var array */
protected $events;
/** @var array */
protected $file_lines;
/**
* @param string $phpbb_root_path
* @param mixed $extension String 'vendor/ext' to filter, null for phpBB core
*/
public function __construct($phpbb_root_path, $extension = null)
{
$this->root_path = $phpbb_root_path;
$this->path = $phpbb_root_path;
$this->events = $this->file_lines = array();
$this->current_file = $this->current_event = '';
$this->current_event_line = 0;
$this->path = $this->root_path;
if ($extension)
{
$this->path .= 'ext/' . $extension . '/';
}
}
/**
* Get the list of all events
*
* @return array Array with events: name => details
*/
public function get_events()
{
return $this->events;
}
/**
* Set current event data
*
* @param string $name Name of the current event (used for error messages)
* @param int $line Line where the current event is placed in
* @return null
*/
public function set_current_event($name, $line)
{
$this->current_event = $name;
$this->current_event_line = $line;
}
/**
* Set the content of this file
*
* @param array $content Array with the lines of the file
* @return null
*/
public function set_content($content)
{
$this->file_lines = $content;
}
/**
* Crawl the phpBB/ directory for php events
* @return int The number of events found
*/
public function crawl_phpbb_directory_php()
{
$files = $this->get_recursive_file_list();
$this->events = array();
foreach ($files as $file)
{
$this->crawl_php_file($file);
}
ksort($this->events);
return sizeof($this->events);
}
/**
* Returns a list of files in $dir
*
* @return array List of files (including the path)
*/
public function get_recursive_file_list()
{
try
{
$iterator = new \RecursiveIteratorIterator(
new \phpbb\event\recursive_event_filter_iterator(
new \RecursiveDirectoryIterator(
$this->path,
\FilesystemIterator::SKIP_DOTS
),
$this->path
),
\RecursiveIteratorIterator::LEAVES_ONLY
);
}
catch (\Exception $e)
{
return array();
}
$files = array();
foreach ($iterator as $file_info)
{
/** @var \RecursiveDirectoryIterator $file_info */
$relative_path = $iterator->getInnerIterator()->getSubPathname();
$files[] = str_replace(DIRECTORY_SEPARATOR, '/', $relative_path);
}
return $files;
}
/**
* Format the php events as a wiki table
* @return string
*/
public function export_events_for_wiki()
{
$wiki_page = '= PHP Events (Hook Locations) =' . "\n";
$wiki_page .= '{| class="sortable zebra" cellspacing="0" cellpadding="5"' . "\n";
$wiki_page .= '! Identifier !! Placement !! Arguments !! Added in Release !! Explanation' . "\n";
foreach ($this->events as $event)
{
$wiki_page .= '|- id="' . $event['event'] . '"' . "\n";
$wiki_page .= '| [[#' . $event['event'] . '|' . $event['event'] . ']] || ' . $event['file'] . ' || ' . implode(', ', $event['arguments']) . ' || ' . $event['since'] . ' || ' . $event['description'] . "\n";
}
$wiki_page .= '|}' . "\n";
return $wiki_page;
}
/**
* @param string $file
* @return int Number of events found in this file
* @throws \LogicException
*/
public function crawl_php_file($file)
{
$this->current_file = $file;
$this->file_lines = array();
$content = file_get_contents($this->path . $this->current_file);
$num_events_found = 0;
if (strpos($content, "dispatcher->trigger_event('") || strpos($content, "dispatcher->dispatch('"))
{
$this->set_content(explode("\n", $content));
for ($i = 0, $num_lines = sizeof($this->file_lines); $i < $num_lines; $i++)
{
$event_line = false;
$found_trigger_event = strpos($this->file_lines[$i], "dispatcher->trigger_event('");
$arguments = array();
if ($found_trigger_event !== false)
{
$event_line = $i;
$this->set_current_event($this->get_event_name($event_line, false), $event_line);
// Find variables of the event
$arguments = $this->get_vars_from_array();
$doc_vars = $this->get_vars_from_docblock();
$this->validate_vars_docblock_array($arguments, $doc_vars);
}
else
{
$found_dispatch = strpos($this->file_lines[$i], "dispatcher->dispatch('");
if ($found_dispatch !== false)
{
$event_line = $i;
$this->set_current_event($this->get_event_name($event_line, true), $event_line);
}
}
if ($event_line)
{
// Validate @event
$event_line_num = $this->find_event();
$this->validate_event($this->current_event, $this->file_lines[$event_line_num]);
// Validate @since
$since_line_num = $this->find_since();
$since = $this->validate_since($this->file_lines[$since_line_num]);
// Find event description line
$description_line_num = $this->find_description();
$description = substr(trim($this->file_lines[$description_line_num]), strlen('* '));
if (isset($this->events[$this->current_event]))
{
throw new \LogicException("The event '{$this->current_event}' from file "
. "'{$this->current_file}:{$event_line_num}' already exists in file "
. "'{$this->events[$this->current_event]['file']}'", 10);
}
sort($arguments);
$this->events[$this->current_event] = array(
'event' => $this->current_event,
'file' => $this->current_file,
'arguments' => $arguments,
'since' => $since,
'description' => $description,
);
$num_events_found++;
}
}
}
return $num_events_found;
}
/**
* Find the name of the event inside the dispatch() line
*
* @param int $event_line
* @param bool $is_dispatch Do we look for dispatch() or trigger_event() ?
* @return string Name of the event
* @throws \LogicException
*/
public function get_event_name($event_line, $is_dispatch)
{
$event_text_line = $this->file_lines[$event_line];
$event_text_line = ltrim($event_text_line, "\t ");
if ($is_dispatch)
{
$regex = '#\$([a-z](?:[a-z0-9_]|->)*)';
$regex .= '->dispatch\(';
$regex .= '\'' . $this->preg_match_event_name() . '\'';
$regex .= '\);#';
}
else
{
$regex = '#extract\(\$([a-z](?:[a-z0-9_]|->)*)';
$regex .= '->trigger_event\(';
$regex .= '\'' . $this->preg_match_event_name() . '\'';
$regex .= ', compact\(\$vars\)\)\);#';
}
$match = array();
preg_match($regex, $event_text_line, $match);
if (!isset($match[2]))
{
throw new \LogicException("Can not find event name in line '{$event_text_line}' "
. "in file '{$this->current_file}:{$event_line}'", 1);
}
return $match[2];
}
/**
* Returns a regex match for the event name
*
* @return string
*/
protected function preg_match_event_name()
{
return '([a-z][a-z0-9_]*(?:\.[a-z][a-z0-9_]*)+)';
}
/**
* Find the $vars array
*
* @return array List of variables
* @throws \LogicException
*/
public function get_vars_from_array()
{
$line = ltrim($this->file_lines[$this->current_event_line - 1], "\t");
if ($line === ');')
{
$vars_array = $this->get_vars_from_multi_line_array();
}
else
{
$vars_array = $this->get_vars_from_single_line_array($line);
}
foreach ($vars_array as $var)
{
if (!preg_match('#^([a-zA-Z_][a-zA-Z0-9_]*)$#', $var))
{
throw new \LogicException("Found invalid var '{$var}' in array for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 3);
}
}
sort($vars_array);
return $vars_array;
}
/**
* Find the variables in single line array
*
* @param string $line
* @param bool $throw_multiline Throw an exception when there are too
* many arguments in one line.
* @return array List of variables
* @throws \LogicException
*/
public function get_vars_from_single_line_array($line, $throw_multiline = true)
{
$match = array();
preg_match('#^\$vars = array\(\'([a-zA-Z0-9_\' ,]+)\'\);$#', $line, $match);
if (isset($match[1]))
{
$vars_array = explode("', '", $match[1]);
if ($throw_multiline && sizeof($vars_array) > 6)
{
throw new \LogicException('Should use multiple lines for $vars definition '
. "for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 2);
}
return $vars_array;
}
else
{
throw new \LogicException("Can not find '\$vars = array();'-line for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 1);
}
}
/**
* Find the variables in single line array
*
* @return array List of variables
* @throws \LogicException
*/
public function get_vars_from_multi_line_array()
{
$current_vars_line = 2;
$var_lines = array();
while (ltrim($this->file_lines[$this->current_event_line - $current_vars_line], "\t") !== '$vars = array(')
{
$var_lines[] = substr(trim($this->file_lines[$this->current_event_line - $current_vars_line]), 0, -1);
$current_vars_line++;
if ($current_vars_line > $this->current_event_line)
{
// Reached the start of the file
throw new \LogicException("Can not find end of \$vars array for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 2);
}
}
return $this->get_vars_from_single_line_array('$vars = array(' . implode(", ", $var_lines) . ');', false);
}
/**
* Find the $vars array
*
* @return array List of variables
* @throws \LogicException
*/
public function get_vars_from_docblock()
{
$doc_vars = array();
$current_doc_line = 1;
$found_comment_end = false;
while (ltrim($this->file_lines[$this->current_event_line - $current_doc_line], "\t") !== '/**')
{
if (ltrim($this->file_lines[$this->current_event_line - $current_doc_line], "\t ") === '*/')
{
$found_comment_end = true;
}
if ($found_comment_end)
{
$var_line = trim($this->file_lines[$this->current_event_line - $current_doc_line]);
$var_line = preg_replace('!\s+!', ' ', $var_line);
if (strpos($var_line, '* @var ') === 0)
{
$doc_line = explode(' ', $var_line, 5);
if (sizeof($doc_line) !== 5)
{
throw new \LogicException("Found invalid line '{$this->file_lines[$this->current_event_line - $current_doc_line]}' "
. "for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 1);
}
$doc_vars[] = $doc_line[3];
}
}
$current_doc_line++;
if ($current_doc_line > $this->current_event_line)
{
// Reached the start of the file
throw new \LogicException("Can not find end of docblock for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 2);
}
}
if (empty($doc_vars))
{
// Reached the start of the file
throw new \LogicException("Can not find @var lines for event '{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 3);
}
foreach ($doc_vars as $var)
{
if (!preg_match('#^([a-zA-Z_][a-zA-Z0-9_]*)$#', $var))
{
throw new \LogicException("Found invalid @var '{$var}' in docblock for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 4);
}
}
sort($doc_vars);
return $doc_vars;
}
/**
* Find the "@since" Information line
*
* @return int Absolute line number
* @throws \LogicException
*/
public function find_since()
{
return $this->find_tag('since', array('event', 'var'));
}
/**
* Find the "@event" Information line
*
* @return int Absolute line number
*/
public function find_event()
{
return $this->find_tag('event', array());
}
/**
* Find a "@*" Information line
*
* @param string $find_tag Name of the tag we are trying to find
* @param array $disallowed_tags List of tags that must not appear between
* the tag and the actual event
* @return int Absolute line number
* @throws \LogicException
*/
public function find_tag($find_tag, $disallowed_tags)
{
$find_tag_line = 0;
$found_comment_end = false;
while (strpos(ltrim($this->file_lines[$this->current_event_line - $find_tag_line], "\t "), '* @' . $find_tag . ' ') !== 0)
{
if ($found_comment_end && ltrim($this->file_lines[$this->current_event_line - $find_tag_line], "\t") === '/**')
{
// Reached the start of this doc block
throw new \LogicException("Can not find '@{$find_tag}' information for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 1);
}
foreach ($disallowed_tags as $disallowed_tag)
{
if ($found_comment_end && strpos(ltrim($this->file_lines[$this->current_event_line - $find_tag_line], "\t "), '* @' . $disallowed_tag) === 0)
{
// Found @var after the @since
throw new \LogicException("Found '@{$disallowed_tag}' information after '@{$find_tag}' for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 3);
}
}
if (ltrim($this->file_lines[$this->current_event_line - $find_tag_line], "\t ") === '*/')
{
$found_comment_end = true;
}
$find_tag_line++;
if ($find_tag_line >= $this->current_event_line)
{
// Reached the start of the file
throw new \LogicException("Can not find '@{$find_tag}' information for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 2);
}
}
return $this->current_event_line - $find_tag_line;
}
/**
* Find a "@*" Information line
*
* @return int Absolute line number
* @throws \LogicException
*/
public function find_description()
{
$find_desc_line = 0;
while (ltrim($this->file_lines[$this->current_event_line - $find_desc_line], "\t") !== '/**')
{
$find_desc_line++;
if ($find_desc_line > $this->current_event_line)
{
// Reached the start of the file
throw new \LogicException("Can not find a description for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 1);
}
}
$find_desc_line = $this->current_event_line - $find_desc_line + 1;
$desc = trim($this->file_lines[$find_desc_line]);
if (strpos($desc, '* @') === 0 || $desc[0] !== '*' || substr($desc, 1) == '')
{
// First line of the doc block is a @-line, empty or only contains "*"
throw new \LogicException("Can not find a description for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 2);
}
return $find_desc_line;
}
/**
* Validate "@since" Information
*
* @param string $line
* @return string
* @throws \LogicException
*/
public function validate_since($line)
{
$match = array();
preg_match('#^\* @since (\d+\.\d+\.\d+(?:-(?:a|b|RC|pl)\d+)?)$#', ltrim($line, "\t "), $match);
if (!isset($match[1]))
{
throw new \LogicException("Invalid '@since' information for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'");
}
return $match[1];
}
/**
* Validate "@event" Information
*
* @param string $event_name
* @param string $line
* @return string
* @throws \LogicException
*/
public function validate_event($event_name, $line)
{
$event = substr(ltrim($line, "\t "), strlen('* @event '));
if ($event !== trim($event))
{
throw new \LogicException("Invalid '@event' information for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 1);
}
if ($event !== $event_name)
{
throw new \LogicException("Event name does not match '@event' tag for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'", 2);
}
return $event;
}
/**
* Validates that two arrays contain the same strings
*
* @param array $vars_array Variables found in the array line
* @param array $vars_docblock Variables found in the doc block
* @return null
* @throws \LogicException
*/
public function validate_vars_docblock_array($vars_array, $vars_docblock)
{
$vars_array = array_unique($vars_array);
$vars_docblock = array_unique($vars_docblock);
$sizeof_vars_array = sizeof($vars_array);
if ($sizeof_vars_array !== sizeof($vars_docblock) || $sizeof_vars_array !== sizeof(array_intersect($vars_array, $vars_docblock)))
{
throw new \LogicException("\$vars array does not match the list of '@var' tags for event "
. "'{$this->current_event}' in file '{$this->current_file}:{$this->current_event_line}'");
}
}
}
|
