<?php
#--------------------------------------------------------------------------FUNCTIONS---------------------------------------------------------------------------------
#the function nth_position() helps locate project information.
function nth_position($str, $letter, $n, $offset = 0){
    $str_arr = str_split($str);
    $letter_size = array_count_values(str_split(substr($str, $offset)));
    if( !isset($letter_size[$letter])){
        trigger_error('letter "' . $letter . '" does not exist in ' . $str . ' after ' . $offset . '. position', E_USER_WARNING);
        return false;
    } 
    else if($letter_size[$letter] < $n) {
        trigger_error('letter "' . $letter . '" does not exist ' . $n .' times in ' . $str . ' after ' . $offset . '. position', E_USER_WARNING);
        return false;
    }
    for($i = $offset, $x = 0, $count = (count($str_arr) - $offset); $i < $count, $x != $n; $i++){
        if($str_arr[$i] == $letter){
        $x++;
        }
    }
    return $i - 1;
}
#-------------------------------------------------------------------------------CONVERSION---------------------------------------------------------------------------
#This part converts most of the inputs to the API into lowercase in order to decrease human error
if(isset($_GET['action'])){
    $action = strtolower($_GET['action']);
}
if(isset($_GET['target'])){
    $target = strtolower($_GET['target']);
}
if(isset($_GET['type'])){
    $type = strtolower($_GET['type']);
}
if(isset($_GET['online'])){
    $inOnline = $_GET['online'];
}
if(isset($_GET['offline'])){
    $inOffline = $_GET['offline'];
}
if(isset($_GET['user'])){
    $inUser = $_GET['user'];
}
if(isset($_GET['user2'])){
    $inUser2 = strtolower($_GET['user2']);
}
if(isset($_GET['user3'])){
    $inUser3 = strtolower($_GET['user3']);
}
if(isset($_GET['user4'])){
    $inUser4 = strtolower($_GET['user4']);
}
if(isset($_GET['return'])){
    $inReturn = strtolower($_GET['return']);
}
#---------------------------------------------------------------IMAGE TO TEXT CUSTOM SETTINGS ----------------------------------------------
$extraText = ''; # these are custom commands that can be set to change the appearance of the custom image, such as text size and colour or background colour.
if(isset($_GET['font_size'])){
    $extraText = $extraText . '&font_size=' . $_GET['font_size'];
}
if(isset($_GET['width'])){
    $extraText = $extraText . '&width=' . $_GET['width'];
}
if(isset($_GET['height'])){
    $extraText = $extraText . '&height=' . $_GET['height'];
}
if(isset($_GET['bgr'])){
    $extraText = $extraText . '&bgr=' . $_GET['bgr']; #bgr, bgg, bgb, textr, textg and textb are all RGB values, only set them to numbers from 0 to 255.
}
if(isset($_GET['bgg'])){
    $extraText = $extraText . '&bgg=' . $_GET['bgg'];#If you don't set one of the rgb values it will assume it is 0 though if r, b and g aren't set the default colour for the fora is used.
}
if(isset($_GET['bgb'])){
    $extraText = $extraText . '&bgb=' . $_GET['bgb'];
}
if(isset($_GET['textr'])){
    $extraText = $extraText . '&textr=' . $_GET['textr'];
}
if(isset($_GET['textg'])){
    $extraText = $extraText . '&textg=' . $_GET['textg'];
}
if(isset($_GET['textr'])){
    $extraText = $extraText . '&textb=' . $_GET['textb'];
}
if(isset($_GET['xpos'])){
    $extraText = $extraText . '&xpos=' . $_GET['xpos'];
}
if(isset($_GET['ypos'])){
    $extraText = $extraText . '&ypos=' . $_GET['ypos'];
}
if(isset($_GET['limitstring'])){
    $extraText = $extraText . '&limitstring=' . $_GET['limitstring'];
}
if(isset($_GET['bgimage'])){
    $extraText = $extraText . '&bgimage=' . $_GET['bgimage'];
}
#-------------------------------------------------------------THE API--------------------------------------------------------------------------------------------
if(isset($action)){ #the action attribute tells the API what sort of thing it's going to do, e.g. look at projects or check your online status
    if($action == 'onlinestatus'){
     #target tells this part of the API whether to search in the tbg forum as well as the main one or not. If left blank, only the main fora are searched.
        if($target == 'tbg'){ #search only the text-based-games forum
            $page = ltrim(file_get_contents('http://scratch.mit.edu/tbgforums/'));
            $startpos = strrpos ($page, "Online:&nbsp;</strong></dt>");
            $endpos = strlen(ltrim(file_get_contents('http://scratch.mit.edu/tbgforums/')));
            $refined = substr($page, $startpos, $endpos);
        }
        if($target == 'all'){ #search the main fora as well as the tbg forum
            $page = ltrim(file_get_contents('http://scratch.mit.edu/tbgforums/'));
            $startpos = strrpos ($page, "Online:&nbsp;</strong></dt>");
            $endpos = strlen(ltrim(file_get_contents('http://scratch.mit.edu/tbgforums/')));
            $refined = substr($page, $startpos, $endpos);
            $page = ltrim(file_get_contents('http://scratch.mit.edu/forums/index.php'));
            $startpos = strrpos ($page, "Online:&nbsp;</strong></dt>");
            $endpos = strlen(ltrim(file_get_contents('http://scratch.mit.edu/forums/index.php')));
            $refined = $refined . substr($page, $startpos, $endpos);
        }
        if(!isset($target)){ #search only the main fora.
            $page = ltrim(file_get_contents('http://scratch.mit.edu/forums/index.php'));
            $startpos = strrpos ($page, "Online:&nbsp;</strong></dt>");
            $endpos = strlen(ltrim(file_get_contents('http://scratch.mit.edu/forums/index.php')));
            $refined = substr($page, $startpos, $endpos);
        }
        #set the default online and offline circle images. If no type value is set, they will appear.
        $online = 'http://blocks.scratchr.org/online.gif'; 
        $offline = 'http://blocks.scratchr.org/offline.gif';
        if(isset($type)){
            if($type == 'square'){ #set the images to square indicators
                $online = 'http://blocks.scratchr.org/onlineSquare.gif';
                $offline = 'http://blocks.scratchr.org/offlineSquare.gif';
            }
            if($type == 'text'){ #set the return to the text 'online' or 'offline'
                $online = 'http://blocks.scratchr.org/onlineText.png';
                $offline = 'http://blocks.scratchr.org/offlineText.png';
            }
            if($type == 'customtext'){ #Allow you to choose your own custom online and offline text.
                $online = 'http://www.blocks.scratchr.org/textrender.php?string=' . $inOnline;
                $offline = 'http://www.blocks.scratchr.org/textrender.php?string=' . $inOffline;
            }
        }
        if(!isset($type)){ #if type isn't set then you're either going for the default images or your own custom online/offline images.
            if(isset($inOnline)){ #if the input 'online' is set, display the image linked there when you are online
                $online = $inOnline;
            }
                if(isset($inOffline)){#if the input 'offline' is set, display the image linked there when you are offline
                $offline = $inOffline;
            }
        }
        $isonline = False; #innocent until proven guilty. The user is assumed to be offline until proof of his presence is found.
        if(isset($inUser)){
            $pos = strrpos($refined, $inUser);
            if($pos >= '1'){
                $isonline = True; #the user's name was found so he is online.
            }
        }
        if(isset($inUser2)){
            $pos = strrpos($refined, $inUser2);
            if($pos >= '1'){
                $isonline = True; #users 2 - 4 can also be checked. If they are all offline then isonline will return false, if any one of them are online it will return true.
            }
        }
        if(isset($inUser3)){
            $pos = strrpos($refined, $inUser3);
            if($pos >= '1'){
                $isonline = True;
            }
        }
        if(isset($inUser4)){
            $pos = strrpos($refined, $inUser4);
            if($pos >= '1'){
                $isonline = True;
            }
        }
        
        
        if(!$isonline){
        #the return attribute indicates what sort of thing is being sent back to the requester, e.g. an image or an URL.
            if($inReturn == 'link'){ #the user asked for this link to be given if they are online
                echo "<meta http-equiv='REFRESH' content='0;url=" . $inOnline .  "'>"; #auto-redirect to requested page.
            }
            if($inReturn != 'link'){ #the user didn't want a link, rather an image.
                echo file_get_contents($offline);  #the image they specified above is returned to the requestee.
                header("Content-Type: image/gif");
            }
        }
        if($isonline){
            if($inReturn == 'link'){
                echo "<meta http-equiv='REFRESH' content='0;url=" . $inOffline .  "'>";
            }
            if($inReturn != 'link'){
                echo file_get_contents($online);
                header("Content-Type: image/gif");
            }
        }
    }
    if($action == 'projects'){ #the following API section looks at a user's projects and return information about them.
        if($type == 'newest'){ #looking at the n'th newest project
            $page = ltrim(file_get_contents('http://scratch.mit.edu/api/getprojectsbyusername/' . $inUser)); #this pulls all the project id's belonging to a user into the API.
            $count = '0';
            $placeholder = '0';
            while ($count < $_GET['num'] - '1'){ #this finds the project id for the n'th newest project. n'th being set by the num parameter.
                $placeholder = strpos($page, ':', $placeholder + '1');
                $count ++;
            }
            if($count > 0){
                $placeholder++;
            }
            $endplaceholder = strpos($page, ':', $placeholder + 1);
            if($inReturn == 'image'){ #the user wants a thumbnail of their project returned.
            #echo "<img src = 'http://scratch.mit.edu/static/projects/" . $inUser . "/" . substr($page, $placeholder, $endplaceholder - $placeholder) . "_sm.png' />"; < this echoes the image rather than the file. For glitch testing.
            echo file_get_contents('http://scratch.mit.edu/static/projects/' . $inUser . '/' . substr($page, $placeholder, $endplaceholder - $placeholder) . '_sm.png');
            header("Content-Type: image/gif");
            }
            if($inReturn == 'link'){ # the user wants a link to their n'th project.
                $user = $inUser;
                $project = substr($page, $placeholder, $endplaceholder - $placeholder);
                echo "<meta http-equiv='REFRESH' content='0;url=http://scratch.mit.edu/projects/" . $user . "/" . $project .  "'>"; #auto-redirect to requested project page.
            }
            if($inReturn == 'text'){ #the user wants the name of their n'th project.
                $project = substr($page, $placeholder, $endplaceholder - $placeholder);
                $page = ltrim(file_get_contents('http://scratch.mit.edu/api/getprojectinfobyid/' . $project)); #getinfobyprojectid is a page on the Scratch site that lists everything about a chosen project.
                $text = strpos($page, ':', 1);
                $text ++;
                $text = substr($page, $text, strpos($page, ':', $text + 1) - 7); #each piece of information is seperated by a : (colon) so all this is just filtering through the colons until it reaches the right one.
                $text = str_replace("%20","_",$text);
                echo file_get_contents('http://www.blocks.scratchr.org/textrender.php?string=' . $text . $extraText);
                header("Content-Type: image/gif");
            }
            if($inReturn == 'loves'){ # the user wants the number of loves of their n'th project
                $project = substr($page, $placeholder, $endplaceholder - $placeholder);
                $page = ltrim(file_get_contents('http://scratch.mit.edu/api/getprojectinfobyid/' . $project));
                $startlove = nth_position($page, ':', 6) + 1;
                $page = substr($page, $startlove, strlen($page));
                $startlove = nth_position($page, ':', 1) + 1;
                $page =  substr($page, 0, $startlove - 1);
                echo file_get_contents('http://www.blocks.scratchr.org/textrender.php?string=' . $page . $extraText);
                header("Content-Type: image/gif");
            }
            if($inReturn == 'faves'){ #the user wants the number of favouriters of their n'th project
                $project = substr($page, $placeholder, $endplaceholder - $placeholder);
                $page = ltrim(file_get_contents('http://scratch.mit.edu/api/getprojectinfobyid/' . $project));
                $startlove = nth_position($page, ':', 7) + 1;
                $page = substr($page, $startlove, strlen($page));
                $startlove = nth_position($page, ':', 1) + 1;
                $page =  substr($page, 0, $startlove - 1);
                echo file_get_contents('http://www.blocks.scratchr.org/textrender.php?string=' . $page . $extraText);
                header("Content-Type: image/gif");
            }
            if($inReturn == 'comments'){ #the user wants the number of comments of their n'th project
                $project = substr($page, $placeholder, $endplaceholder - $placeholder);
                $page = ltrim(file_get_contents('http://scratch.mit.edu/api/getprojectinfobyid/' . $project));
                $startlove = nth_position($page, ':', 12) + 1;
                $page = substr($page, $startlove, strlen($page));
                $startlove = nth_position($page, ':', 1) + 1;
                $page =  substr($page, 0, $startlove - 1);
                echo file_get_contents('http://www.blocks.scratchr.org/textrender.php?string=' . $page . $extraText);
                header("Content-Type: image/gif");
            }
            if($inReturn == 'remixes'){ #the user wants the number of remixes of their n'th project
                $project = substr($page, $placeholder, $endplaceholder - $placeholder);
                $page = ltrim(file_get_contents('http://scratch.mit.edu/api/getprojectinfobyid/' . $project));
                $startlove = nth_position($page, ':', 8) + 1;
                $page = substr($page, $startlove, strlen($page));
                $startlove = nth_position($page, ':', 1) + 1;
                $page =  substr($page, 0, $startlove - 1);
                echo file_get_contents('http://www.blocks.scratchr.org/textrender.php?string=' . $page . $extraText);
                header("Content-Type: image/gif");
            }
            if($inReturn == 'downloads'){ # the user wants the number of downloads of their n'th project
                $project = substr($page, $placeholder, $endplaceholder - $placeholder);
                $page = ltrim(file_get_contents('http://scratch.mit.edu/api/getprojectinfobyid/' . $project));
                $startlove = nth_position($page, ':', 13) + 1;
                $page = substr($page, $startlove, strlen($page));
                echo file_get_contents('http://www.blocks.scratchr.org/textrender.php?string=' . $page . $extraText);
                header("Content-Type: image/gif");
            }
            if($inReturn == 'views'){ # The user wants the number of views for their n'th project
                $project = substr($page, $placeholder, $endplaceholder - $placeholder);
                $page = ltrim(file_get_contents('http://scratch.mit.edu/projects/' . $_GET['user'] . '/' . $project));
                $viewStart = strrpos($page, '<!-- ::: Begin viewers, lovers, taggers and favoriters ::: -->') + 71;
                $viewEnd = strrpos($page, 'views, <a href') - 1;
                $page = substr($page, $viewStart, $viewEnd - $viewStart);
                echo file_get_contents('http://www.blocks.scratchr.org/textrender.php?string=' . $page . $extraText);
                header("Content-Type: image/gif");
            }
        }
        if($type == 'least'){ #this type will return the project witth the least number of.... loves/faves/views etc.
            $page = 'http://scratch.mit.edu/api/getprojectsbyusername/' . $_GET['user'];
            $numberOfProjects = substr_count(file_get_contents($page), ':', 0) + 1;
            $projectcount = 1;
            if($inReturn == 'views'){
                $start = nth_position($page, ':', $count) + 1;
                $end = nth_position($page, ':', $count + 1) + 1;
                
            }
        }
    }
    if($action == 'friends'){ #Thanks to SeptimusHeap for this section
        if($type == 'newest'){
            $page = ltrim(file_get_contents('http://scratch.mit.edu/api/getfriendsbyusername/' . $inUser));
            $count = '0';
            $placeholder = '0';
            while ($count < $_GET['num'] - '1'){
                $placeholder = strpos($page, ':', $placeholder + '1');
                $count ++;
            }
            if($count > 0){
                $placeholder++;
            }
            $endplaceholder = strpos($page, ':', $placeholder + 1);
            if($inReturn == 'image'){
            #echo "<img src = 'http://scratch.mit.edu/static/icons/buddy/" . substr($page, $placeholder, $endplaceholder - $placeholder) . "_sm.png' />"; < this echoes the image rather than the file. For glitch testing.
            echo file_get_contents('http://scratch.mit.edu/static/icons/buddy/' . substr($page, $placeholder, $endplaceholder - $placeholder) . '_sm.png');
            header("Content-Type: image/gif");
        }
            if($inReturn == 'link'){
                $user = $inUser;
                $userguy = substr($page, $placeholder, $endplaceholder - $placeholder);
                echo "<meta http-equiv='REFRESH' content='0;url=http://scratch.mit.edu/api/getuser/" . $userguy .  "'>";
            }
        }
    }
    if($action == 'text'){
        echo file_get_contents('http://blocks.scratchr.org/textrender.php?string=' . $_GET['string'] . $extraText);
        header("Content-Type: image/gif");
    }
    if($action == 'random'){
        $numberOfLinks = 0;
        if(isset($_GET['link1'])){
            $numberOfLinks ++;
        }
        if(isset($_GET['link2'])){
            $numberOfLinks ++;
        }
        if(isset($_GET['link3'])){
            $numberOfLinks ++;
        }
        if(isset($_GET['link4'])){
            $numberOfLinks ++;
        }
        if(isset($_GET['link5'])){
            $numberOfLinks ++;
        }
        if(isset($_GET['link6'])){
            $numberOfLinks ++;
        }
        if(isset($_GET['link7'])){
            $numberOfLinks ++;
        }
        if(isset($_GET['link8'])){
            $numberOfLinks ++;
        }
        if(isset($_GET['link9'])){
            $numberOfLinks ++;
        }
        if(isset($_GET['link10'])){
            $numberOfLinks ++;
        }
        if($numberOfLinks > 0){
            $url = rand(1, $numberOfLinks);
            if($inReturn == 'image'){
                echo file_get_contents($_GET['link' . $url]);
                header("Content-Type: image/gif");
            }
            if($inReturn == 'link'){
                echo "<meta http-equiv='REFRESH' content='0;url=" . $_GET['link' . $url] .  "'>";
            }
        }
    }
}
if(!isset($action)){
echo "<p>Sorry, you've not set the action parameter, I don't know what to do! For documentation on this API look <a href = 'http://scratch.mit.edu/forums/viewtopic.php?id=69113&p=1'>here</a>";
}
?>

<?PHP
//parser in spaces
$count = 1;
$string = str_replace("_"," ",$_GET['string']);
if(isset($_GET['bgimage']) && strstr($_GET['bgimage'], ".png")){ #thanks to LS97 for making most of the bgimage attribute!
    // create the background
    $img = imagecreatefrompng($_GET['bgimage']);
    
    //chooses the text color
        if(isset($_GET['textr']) | isset($_GET['textg']) | isset($_GET['textb'])){
        $red = (int)$_GET['textr'];
        $green = (int)$_GET['textg'];
        $blue = (int)$_GET['textb'];
        $text_colour = imagecolorallocate($img, $red, $blue, $green);
    }
    else{
        $text_colour = imagecolorallocate($img, 0, 0, 0);
    }
    
    // get the font
    $font = realpath('Trebuchet_MS.ttf');
    
    // print the string
    $xpos = 5;
    if(isset($_GET['xpos'])){
        $xpos = $_GET['xpos'];
    }
    $ypos = 20;
    if(isset($_GET['ypos'])){
        $ypos = $_GET['ypos'];
    }
    imagettftext($img, 13, 0, $xpos, $ypos, $text_colour, $font, $string);
    
    // tell browser about content type
    header( 'Content-type: image/png' );
    // create image
    imagepng( $img );
}
if(!isset($_GET['bgimage'])){
    // Set font size
    $font_size = 2;
    if(isset($_GET['font_size'])){
        $font_size = $_GET['font_size'];
    }
    $font = '/fonts/Trebuchet_MS.ttf';
    if(isset($_GET['font'])){
        $font = $_GET['font'];
    }
    // Create image width dependant on width of the string
    $width  = imagefontwidth($font_size)*strlen($string);
    if(isset($_GET['width'])){
        $width = $_GET['width'];
    }
    // Set height to that of the font
    $height = imagefontheight($font_size);
    if(isset($_GET['height'])){
        $height = $_GET['height'];
    }
    // Create the image pallette
        $img = imagecreate($width,$height);
        if(isset($_GET['bgr']) | isset($_GET['bgg']) | isset($_GET['bgb'])){
            $red = (int)$_GET['bgr'];
            $blue = (int)$_GET['bgg'];
            $green = (int)$_GET['bgb'];
            $bg    = imagecolorallocate($img, $red, $blue, $green);
        }
        else{
            $bg    = imagecolorallocate($img, 222, 223, 223);
        }
    // Font color
    if(isset($_GET['textr']) | isset($_GET['textg']) | isset($_GET['textb'])){
        $red = (int)$_GET['textr'];
        $green = (int)$_GET['textg'];
        $blue = (int)$_GET['textb'];
        $color = imagecolorallocate($img, $red, $blue, $green);
    }
    else{
        $color = imagecolorallocate($img, 0, 0, 0);
    }
    // Length of the string
    if(isset($_GET['limitstring'])){
        if(strlen($string) > $_GET['limitstring']){
            $string= substr($string, 0, $_GET['limitstring']);
        }
    }
    $len = strlen($string);
    // Y-coordinate of character, X changes, Y is static
    $ypos = 0;
    if(isset($_GET['ypos'])){
        $ypos = $_GET['ypos'];
    }
    // Loop through the string
    for($i=0;$i<$len;$i++){
        // Position of the character horizontally
        if(isset($_GET['xpos'])){
            $xpos = $i * imagefontwidth($font_size) + $_GET['xpos'];
        }
        else{
            $xpos = $i * imagefontwidth($font_size);
        }
        // Draw character
        imagechar($img, $font_size, $xpos, $ypos, $string, $color);
        // Remove character from string
        $string = substr($string, 1);   
    
    }
    // Return the image
    header("Content-Type: image/gif");
    imagegif($img);
}
// Remove image
imagedestroy($img);
?>

[img]http://www.blocks.scratchr.org/API.php?action=random&return=image&link1=IMAGELINK1&link2=IMAGELINK2[/img]

[url=http://www.blocks.scratchr.org/API.php?action=random&return=link&link1=LINK1URL&link2=LINK2URL]LINKTEXT/IMAGE[/url]

code=php