<?php

$f3 = require(__DIR__.'/vendor/fatfree/lib/base.php');

if(getenv("DEBUG")) {
    $f3->set('DEBUG', getenv("DEBUG"));
}

$f3->set('ROOT', __DIR__);
$f3->set('UI', $f3->get('ROOT')."/templates/");
$f3->set('UPLOADS', sys_get_temp_dir()."/");

function convertPHPSizeToBytes($sSize)
{
    //
    $sSuffix = strtoupper(substr($sSize, -1));
    if (!in_array($sSuffix,array('P','T','G','M','K'))){
        return (int)$sSize;
    }
    $iValue = substr($sSize, 0, -1);
    switch ($sSuffix) {
        case 'P':
            $iValue *= 1024;
            // Fallthrough intended
        case 'T':
            $iValue *= 1024;
            // Fallthrough intended
        case 'G':
            $iValue *= 1024;
            // Fallthrough intended
        case 'M':
            $iValue *= 1024;
            // Fallthrough intended
        case 'K':
            $iValue *= 1024;
            break;
    }
    return (int)$iValue;
}

$f3->route('GET /',
    function($f3) {
        $f3->set('key', hash('md5', uniqid().rand()));
        $f3->set('maxSize',  min(array(convertPHPSizeToBytes(ini_get('post_max_size')), convertPHPSizeToBytes(ini_get('upload_max_filesize')))));

        echo View::instance()->render('index.html.php');
    }
);
$f3->route('GET /@key',
    function($f3) {
        $f3->set('key', $f3->get('PARAMS.key'));

        echo View::instance()->render('pdf.html.php');
    }
);
$f3->route('POST /image2svg',
    function($f3) {
        $files = Web::instance()->receive(function($file,$formFieldName){
            if(strpos(Web::instance()->mime($file['tmp_name'], true), 'image/') !== 0) {

                return false;
            }

            return true;
        }, true, function($fileBaseName, $formFieldName) use ($f3) {

            return basename(tempnam($f3->get('UPLOADS'), 'pdfsignature_image2svg'));
	    });

        $imageFile = null;
        foreach($files as $file => $valid) {
            if(!$valid) {
                continue;
            }
            $imageFile = $file;
        }

        if(!$imageFile) {
            $f3->error(403);
        }

        shell_exec(sprintf("convert -background white -flatten %s %s", $imageFile, $imageFile.".bmp"));
        shell_exec(sprintf("mkbitmap -x -f 8 %s -o %s", $imageFile.".bmp", $imageFile.".bpm"));
        shell_exec(sprintf("potrace --svg %s -o %s", $imageFile.".bpm", $imageFile.".svg"));

        header('Content-Type: image/svg+xml');
        echo file_get_contents($imageFile.".svg");

        if($f3->get('DEBUG')) {
            return;
        }

        array_map('unlink', glob($imageFile."*"));
    }
);
$f3->route('POST /sign',
    function($f3) {
        $filename = null;
        $files = Web::instance()->receive(function($file,$formFieldName){
            if(strpos(Web::instance()->mime($file['tmp_name'], true), 'application/pdf') !== 0) {
                return false;
            }

            return true;
        }, true, function($fileBaseName, $formFieldName) use ($f3, &$filename) {
            $filename = str_replace(".pdf", "_signe.pdf", $fileBaseName);
            $tmpfile = tempnam($f3->get('UPLOADS'), 'pdfsignature_pdf');
            unlink($tmpfile);
            return basename($tmpfile).".pdf";
	    });

        $pdfFile = null;
        foreach($files as $file => $valid) {
            if(!$valid) {
                continue;
            }
            $pdfFile = $file;
        }

        if(!$pdfFile) {
            $f3->error(403);
        }

        $svgData = $_POST['svg'];

        $svgFiles = "";
        foreach($svgData as $index => $svgItem) {
            $svgFile = $pdfFile.'_'.$index.'.svg';
            file_put_contents($svgFile, $svgItem);
            $svgFiles .= $svgFile . " ";
        }

        shell_exec(sprintf("rsvg-convert -f pdf -o %s %s", $pdfFile.'.svg.pdf', $svgFiles));
        shell_exec(sprintf("pdftk %s multibackground %s output %s", $pdfFile.'.svg.pdf', $pdfFile, $pdfFile.'_signe.pdf'));

        Web::instance()->send($pdfFile.'_signe.pdf', null, 0, TRUE, $filename);

        if($f3->get('DEBUG')) {
            return;
        }
        array_map('unlink', glob($pdfFile."*"));
    }
);

return $f3;