lib_lace.php

charset : UTF-8 支援IE, Firefox等瀏覽器

<?php

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
 * Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/**
 * userList()
 *
 * Returns a JSON or HTML representation of
 * the current User List
 */
function userList($json = false)
{
	global $A;

	$users = $A->getUsers();

	$output = '';

	if ($json === false)
	{
		foreach ($users as $name)
		{
			$output .= '<li>'.$name.'</li>';
		}

		return $output;
	}

	$userHash = postVar('userHash', false);
	$hash = $A->getHash();
	if ($userHash === $hash)
	{
		$output = '"user":{"nodata":"1"}';
	}
	else
	{
		$output = '[';

		foreach($users as $name)
		{
			$output .= '"'.addslashes(mb_substr($name, 0, 10)).'",';
		}

		$output = rtrim($output, ',');
		$output .= ']';

		$output = '"user":{"hash":"'.$hash.'","data":'.$output.',"userHash":"'.$userHash.'"}';
	}

	return $output;
}


/**
 * joinMessage()
 *
 * Add a user join message to the log
 */
function joinMessage($name)
{
	if (LACE_SHOW_JOIN_PART)
	{
		global $A;
		if($name && false === $A->keyExists($name))
		{
			$message = array
			(
				'action' => true,
				'time'   => time(),
				'name'   => 'Lace',
				'text'   => '<strong>'.$name.'</strong> joins the conversation',
			);
			addMessage($message);
		}
	}
}

/**
 * isFlooding()
 *
 * Determine whether a user is flooding
 */
function isFlooding()
{
	$postCount = cookieVar(LACE_FLOOD_COOKIE);

	if ($postCount === false)
	{
		setCookie(LACE_FLOOD_COOKIE, '1', time() + 9, LACE_URL_REL);
		return false;
	}

	setCookie(LACE_FLOOD_COOKIE, ++$postCount, time() + 9, LACE_URL_REL);

	if ($postCount > LACE_FLOOD_POST_COUNT)
	{
		return true;
	}

	return false;
}

/**
 * laceListener()
 *
 * Checks POST variables for incoming messages or
 * update requests.
 */
function laceListener($fromListener = true)
{
	$cookie_name = cookieVar(LACE_NAME_COOKIE, false);

	$post_name = postVar('name', false); // name
	$post_text = postVar('text', false); // text

	if ($post_name !== false && $post_text !== false)
	{
		if (validateSession() === false)
			return '"chat":{"nodata":"1"}';

		if (isFlooding() === true)
			return '"chat":{"nodata":"1"}';

		$message = prepareMessage($post_name, $post_text);

		if ($message !== false)
		{
			if ($cookie_name && $cookie_name != $post_name)
			{
				addNameChange($cookie_name, $post_name);
			}
			else
			{
				global $A; // Activity object
				joinMessage($post_name);
				$A->update($post_name);
			}

			// Reset $name just in case it has been changed
			global $name;
			$name = $post_name;
			setcookie(LACE_NAME_COOKIE, $post_name, time() + 259200, LACE_URL_REL);

			addMessage($message);
		}
	}

	if ($fromListener)
	{
		$chatHash = postVar('chatHash', false);

		if ($chatHash)
		{
			$hash = getMessageHash();

			if (validateSession() === false || $chatHash == $hash)
			{
				return '"chat":{"nodata":""}';
			}

			$json = '"chat":{"hash":"'.$hash.'","data":"';
			$json.= addslashes(str_replace("\n", "", printFileContentsHTML())).'"}';
			return $json;
		}

		return '"chat":{"nodata":""}';
	}

	return '"chat":{"nodata":""}';
}


/**
 * getMessageHash()
 *
 * Hash the main file for detecting changes
 */
function getMessageHash()
{
	// hash the main file
	if (LACE_HASH_MD5 === true)
		return md5(file_get_contents(LACE_FILE));
	else
	{
		clearstatcache();
		return filemtime(LACE_FILE).':'.filesize(LACE_FILE);
	}
}

/**
 * getFileContentsRaw()
 *
 * Retrieve raw file contents as one giant string
 * (Why? You can't pass arrays between PHP and Javascript,
 *  unless you use something like PHP-JSON/JSON-PHP, of course.)
 */
function getFileContentsRaw($file = LACE_FILE)
{
	$today      = date('l');
	$dayString  = '';
    $hourString = '';
	$finalOutput  = '';

	// Read the file
	$fileContents = file($file);

	if(is_array($fileContents) && count($fileContents) > 0)
	{
		// We want logfiles in reverse order.
		if ($file != LACE_FILE)
			$fileContents = array_reverse($fileContents);

		// Create the proper HTML for each line
		foreach ($fileContents as $line)
		{
			if (0 == preg_match("/^(\d{10})\|\|(.+?)\|\|(.+?)$/", $line))
				continue;

			// Turn the record into an array full of info
			$line = extractMessageArray($line);

			$output = '';

			// Check for new Day
			if ($file == LACE_FILE)
			{
				if ($line['day'] != $dayString)
				{
					$first     = ($dayString == '') ? '*' : '';
					$dayString = $line['day'];
					$output   .= 'date-'.$line['timestamp'].'||';
					$output   .= $first.$line['date_full'].'||||';
				}
			}
			else
			{
				// Logfiles don't have multiple days
				if($hourString == '')
					$output .= 'date||*' . $line['date_full'] . '||||';
			}

			// Check for new Hour
			if ( ($file == LACE_FILE && $line['day'] == $today
				&& $line['hour'] != $hourString)
				|| ($file != LACE_FILE && $line['hour'] != $hourString) )
			{
				$first      = ($hourString == '') ? '*' : '';
				$hourString = $line['hour'];
				$output    .= 'hour-'.$line['hour'].'||'.$first.$hourString.':00||||';
			}

			// Check for Action
			$action  = ($line['action']) ? '*' : '';
			$timestr = ($file == LACE_FILE)
					? 'Posted about '.$line['age'].' ago at '.$line['time']
					: $line['time'];

			$output .= $line['timestamp'].'||'.$timestr.'||'.$action.$line['name'];
			$output .= '||'.$line['text'].'||||';

			$finalOutput .= $output;
		}
	}
	else
	// $fileContents array is empty
	{
		$finalOutput .= 'date||*' . date('l, d F Y') . '||||';
		$finalOutput .= time() . '|| ||!Lace||';
		$welcome      = ($file == LACE_FILE)
			? 'Welcome to '.LACE_SITE_NAME.'. No one has said anything yet.'
			: 'The current log is empty.';
		$finalOutput .= (file_exists($file))
			? $welcome
			: 'Sorry, the file you asked for doesn\'t exist.';
	}

	return rtrim($finalOutput, '|');
}

/**
 * printFileContentsHTML()
 *
 * Grab the files's contents and format it with HTML
 * all in one step.
 */
function printFileContentsHTML($file = LACE_FILE) {
	return formatFileContents(getFileContentsRaw($file));
}

/**
 * formatFileContents()
 *
 * Wrap raw file contents in HTML for display
 */
function formatFileContents($rawFileContents)
{
	// break apart the file contents into records
	$items  = explode('||||', $rawFileContents);
	$count  = count($items);
	$output = '';

	for ($i = 0; $i < $count; $i++)
	{
		// break record into fields
		$fields = explode('||', $items[$i]);

		if (mb_substr($fields[0], 0, 4) == 'date')
		{
			// show a date heading

			// fields[0] = id attribute
			// fields[1] = date string (a * prefix denotes that it's
			//                          class attribute is 'first')
			$first   = ($fields[1]{0} == '*');
			$class   = ($first) ? ' class="daystamp first"' : ' class="daystamp"';
			$date    = ($first) ? mb_substr($fields[1], 1) : $fields[1];

			$output .= '<div' . $class . '><h4>'.$date.'</h4></div>'."\n";
			continue;
		}

		if (mb_substr($fields[0], 0, 4) == 'hour')
		{
			if (LACE_SHOW_HOUR === true)
			{
				// show the hourly timestamp

				// fields[0] = id attribute
				// fields[1] = hour string (a * prefix denotes that it's
				//                          class attribute is 'first')
				$first   = ($fields[1]{0} == '*');
				$class   = ($first) ? ' class="hourstamp first"' : ' class="hourstamp"';
				$hour    = ($first) ? mb_substr($fields[1], 1) : $fields[1];
				// Message id attributes sometimes were non-unique because the messages shared
				// the same timestamp.  Until a solution is found - and one may not be necessary -
				// the id is simply ignored and is not needed.  (Also helps keep XHTML valid)
				//$output .= '<div id="' . $fields[0] . '"' . $class . '><h5>' . $hour . '</h5></div>'."\n";
				$output .= '<div' . $class . '><h5>' . $hour . '</h5></div>'."\n";
			}
			continue;
		}

		// show the message

		// $fields[0] = id attribute
		// $fields[1] = time string
		// $fields[2] = name (a * prefix denotes an action, a ! denotes a system notice)
		// $fields[3] = text
		$action = ($fields[2]{0} == '*');
		$notice = ($fields[2]{0} == '!');
		$name   = ($action || $notice) ? mb_substr($fields[2], 1) : $fields[2];

		// A system message is defined by an action by the user Lace
		$system = ($action && $name == 'Lace');
		$class  = ($action && !$system) ? 'message action' : 'message';

		// Build up message HTML
		$output .= '<p';
		$output .= ($notice) ? ' class="notice"' : '';
		$output .= ($system) ? ' class="system"' : '';
		$output .= '><span class="name">';
		$output .= ($action && !$system)
			? '&nbsp;'
			: $name.' <a title="'.$fields[1].'">::</a> ';
		$output .= '</span><span class="' . $class . '">';
		$output .= ($action && !$system)
			? '<a title="'.$fields[1].'">'.$name.'</a> '
			: '';
		$output .= $fields[3] . '</span></p>' . "\n";
	}

	return $output;
}

/**
 * getName()
 *
 * Attempt to find a user's name in the $_POST
 * and $_COOKIE variables
 */
function getName()
{
	// Look for the name in $_POST then in
	// $_COOKIE, or give a new generic name
	if (array_key_exists('name', $_POST) && mb_strlen(trim($_POST['name'])) > 0)
	{
		$name = urldecode($_POST['name']);
		setcookie(LACE_NAME_COOKIE, $name, time()+3600*24*30, LACE_URL_REL);
	}
	else
		$name = cookieVar(LACE_NAME_COOKIE, 'Guest ' . mb_substr(rand(0,9999), 0, 4));

	return $name;
}

/**
 * extractMessageArray()
 *
 * Convert a record from the data file
 * into a usable array of data
 */
function extractMessageArray($line)
{
	$linearray = explode('||', $line);

	// Snag the unix timestamp and perform some date calculations
	$datetime = array_shift($linearray);

	// Time elapsed (e.g. 1.5 hours, 4 days, etc.)
	$age = duration_str(time() - $datetime, false, 2);

	// Long format date
    $date_full = date("l, d F Y", $datetime);

    // Short format date
    $date = date('m/d/Y', $datetime);

    // Time of day
    $time = date('H:i', $datetime);

    // Day of week
    $day = date('l', $datetime);

	// Hour
	$hour = date('H', $datetime);

    // Next snag the name
    $name = array_shift($linearray);

	// Check for action or system notice
	$action = ($name{0} == '*') ? true : false;
	$notice = ($name{0} == '!') ? true : false;

	if ($action || $notice)
		$name = mb_substr($name, 1);

	// Now put the post back together
	$words = trim(implode(' ', $linearray));

	// return this mess of info
	return array
	(
		'timestamp' => $datetime,
		'date_full' => $date_full,
		'date'      => $date,
		'time'      => $time,
		'day'       => $day,
		'hour'      => $hour,
		'age'       => $age,
		'action'    => $action,