BlinkenApplet/Mediawiki Extension

How to Install

1. Download the latest version of BlinkenApplet and put it into the "extensions" directory below your wiki install path

2. Copy the PHP code below and set $appletpath to the path you saved the applet to.(*); If the Applet says "notinited" you have to arrange $appletpath.

(*) example, cause can be tricky: if your Apache document_root is /var/www and you installed the wiki to /var/www/w (in order to make URLs appear as /wiki/ and hide the index.php); you need to set the path like an absolute path but from the wiki's point of view, so $appletpath="/w/extensions/BlinkenApplet0.71.jar"; would be correct even though you copied the file to /var/www/w/extensions on the shell.

3. Set $dbuser="wikiuser"; and $dbpass="yourpassword"; to the/a MySQL user and password that has access to the "wikidb" database. (yes this could be probably made better by including it from general Mediawiki config)

4. After editing save as BlinkenExtension.php and also put it into "extensions" in your wiki install dir. Make sure the user who runs the webserver can at least read it.

5. Edit LocalSettings.php in your wiki install dir and near the bottom add the line: include("extensions/BlinkenExtension.php");.

6. (Optional) To use the bonus features make sure you/PHP can execute the shell commands: date,ddate,dict,top,grep,cat and use PHP' crypt() function.

BlinkenExtension.php

<?php
# BlinkenApplet Mediawiki Extension
# An extension to display Blinkenlights scrolltexts on Mediawiki pages.
# by mutante for took (author of BlinkenApplet)
# http://s23.org/wiki/BlinkenApplet
# http://blinkenapplet.sf.net/
# S23 - 2006/06/15

$wgExtensionFunctions[] = "wfBlinkenExtension";

# extension hook callback function from mediawiki

function wfBlinkenExtension() {
global $wgParser;
$wgParser->setHook( "blinken", "renderBlinkenapplet" );
   }

# the actual extension function
function renderBlinkenapplet( $input, $argv ) {
global $wgOutputEncoding;

# Config

# set path to applet here
$appletpath="/w/extensions/BlinkenApplet0.71.jar";

# set a mysql user with (select) access to "wikidb" here
$dbuser="wikiuser";
$dbpass="";

# Just in case your MySQL server is not on the same host
$dbhost="localhost";
# Just in case you choose a different database name on Mediawiki install
$dbname="wikidb";

# End Config

# debug level of BlinkenApplet
$debug=1;
$version="BlinkenApplet0.71.jar";

# some default input for testing
# $input="BlinkenApplet by took running on S23 Wiki. It works.";

# filter our mysql escape strings from user input, just to make sure
$input = mysql_real_escape_string($input);

# Is input a string and not too long?
if (!is_string($input) || strlen($input)>255) {
$input="error - no text input or text over 255 chars)";
}

# Input SPECIALS
case "\$fnord":
# fetch a random fnord from mysql (fnord database doesnt ship with Mediawiki)
# Use <blinken$fnord</blinken>

$hd = mysql_connect("$dbhost", "$dbuser", "$dbpass") or die ("Unable to connect");
mysql_select_db ("$dbname", $hd) or die ("Unable to select database");
$res = mysql_query("SELECT * from fnord ORDER BY rand() LIMIT 0,1", $hd) or die ("Unable to run query");
while ($row = mysql_fetch_assoc($res))
{
$id = $row["id"];
$fnord = $row["text"];
}
$input = $fnord;
break;

# This gets the current site statistics from the wiki and displays it.
# Use <blinken>$wikistats</blinken>

case "\$wikistats":
$hd = mysql_connect("$dbhost", "$dbuser", "$dbpass") or die ("Unable to connect");
mysql_select_db ("$dbname", $hd) or die ("Unable to select database");
$res = mysql_query("SELECT * from site_stats", $hd) or die ("Unable to run query");
while ($row = mysql_fetch_assoc($res))
{
$views = $row["ss_total_views"];
$edits = $row["ss_total_edits"];
$good = $row["ss_good_articles"];
$total = $row["ss_total_pages"];
$users = $row["ss_users"];
$images = $row["ss_images"];
}
$input = "Wiki Site Stats: Views: $views Edits: $edits Good pages: $good Total pages: $total Users: $users Images: $images";
break;

case "\$date":
# show date
# Use <blinken>$date</blinken>

$input = `date -u`;
break;

case "\$ddate":
# show discordian date
# Use <blinken>$ddate</blinken>
$input = `ddate`;
break;

case "\$ddate +%.":
# ddate easteregg
# Use <blinken>ddate +%.</blinken>
$input = `ddate +%.`;
break;

case "\$loadavg":
# show system load average 
# Use <blinken>$loadavg</blinken>
$input = `top -b -n1 -s | grep load | cut -d, -f4,5,6`;
break;

case "\$myIP":
# show User IP (not server IP, each user sees hiw own IP)
# Use <blinken>$myIP</blinken>

if (getenv(HTTP_X_FORWARDED_FOR)) {
    $ip = getenv(HTTP_X_FORWARDED_FOR);
} else {
    $ip = getenv(REMOTE_ADDR);
}
$input="Your IP is $ip";
break;

default:
# normal text input
$input=$input;
}

# crypt:<text>
# encrypt input text
# http://www.php.net/crypt
# Use <blinken>crypt:sometext</blinken>
if (substr($input, 0, 6) == "crypt:") {
$input=explode(":",$input);
$input=$input[1];
$input=crypt($input);
$input=substr($input,0, 254);
}

# dict:<dict>
# fetch a dictionary definition
# man dict
# Use <blinken>dict:fnord</blinken>

if (substr($input, 0, 5) == "dict:") {
$input=explode(":",$input);
$input=$input[1];
# $input=`dict $input | sed s/\'//g | sed s/\"//g | xargs`;
# $input=explode(":",$input);
# $input=$input[1].$input[2];
# $input=addslashes($input);
$input="Dict feature currently disabled for security reasons.";
$input=substr($input,0, 254);
}

# Set Colors
# Background Color

$bgcolor=explode(",",$argv["bgcolor"]);
$bgred=$bgcolor[0];
$bggreen=$bgcolor[1];
$bgblue=$bgcolor[2];

if (!is_numeric($bgred) || $bgred<0 || $bgred>255) {
$bgred="255";
}
if (!is_numeric($bggreen) || $bggreen<0 || $bggreen>255) {
$bggreen="255";
}
if (!is_numeric($bgblue) || $bgblue<0 || $bgblue>255) {
$bgblue="255";
}

$bgcolor="$bgred,$bggreen,$bgblue";

# LampOn Color

$lamponcolor=explode(",",$argv["lamponcolor"]);
$lamponred=$lamponcolor[0];
$lampongreen=$lamponcolor[1];
$lamponblue=$lamponcolor[2];

if (!is_numeric($lamponred) || $lamponred<0 || $lamponred>255) {
$lamponred="0";
}
if (!is_numeric($lampongreen) || $lampongreen<0 || $lampongreen>255) {
$lampongreen="255";
}
if (!is_numeric($lamponblue) || $lamponblue<0 || $lamponblue>255) {
$lamponblue="0";
}

$lamponcolor="$lamponred,$lampongreen,$lamponblue";

# LampOff Color

$lampoffcolor=explode(",",$argv["lampoffcolor"]);
$lampoffred=$lampoffcolor[0];
$lampoffgreen=$lampoffcolor[1];
$lampoffblue=$lampoffcolor[2];

if (!is_numeric($lampoffred) || $lampoffred<0 || $lampoffred>255) {
$lampoffred="0";
}
if (!is_numeric($lampoffgreen) || $lampoffgreen<0 || $lampoffgreen>255) {
$lampoffgreen="0";
}
if (!is_numeric($lampoffblue) || $lampoffblue<0 || $lampoffblue>255) {
$lampoffblue="0";
}

$lampoffcolor="$lampoffred,$lampoffgreen,$lampoffblue";

# Set Font
# Set Font
switch ($argv["font"]) {
case "5pxStd":
$font="5pxStd";
break;
case "8pxStd":
$font="8pxStd";
break;
case "MorseCode":
$font="MorseCode";
break;
default:
$font="5pxStd";
}

# Set Loop
if ($argv["loop"]=="Off" || $argv["loop"]=="off" ) {
$loop="off";
} else {
$loop="on";
}

# Set Width
if (is_numeric($argv["width"]) && $argv["width"]>=0 && $argv["width"] <=800) {
$width=$argv["width"];
} else {
$width=200;
}

# Set Height
if (is_numeric($argv["height"]) && $argv["height"]>=0 && $argv["height"] <=800) {
$height=$argv["height"];
} else {
$height=200;
}

# Set Delay
if (is_numeric($argv["delay"]) && $argv["delay"]>=0 && $argv["delay"] <=100) {
$delay=$argv["delay"];
} else {
$delay=1;
}

# Build Html Output

$output= <<<END
<applet codebase = "." code=blinkenapplet.BlinkenApplet.class
archive="$appletpath" width="$width" height="$height">
<param name="debugLevel" value="$debug">
<param name="lauftext" value="$input">
<param name="lauftext_loop" value="$loop">
<param name="ShowDemo1" value="off">
<param name="ShowDemo2" value="off">
<param name="lauftext_schriftart" value="$font">
<param name="delayFaktor" value="$delay">
<param name="bgColor" value="$bgcolor">
<param name="LampOffColor" value="$lampoffcolor">
<param name="LampOnColor" value="$lamponcolor">
</applet>
END;
# Send it
return $output;
        }
?>