<?php
$templateOdt = 'test.odt';
$imageFile   = 'qr.png';
$outputOdt  = 'output.odt';
$tmpDir = sys_get_temp_dir() . '/odt_' . uniqid();
mkdir($tmpDir);

// 1. ODT entpacken
$zip = new ZipArchive();
if ($zip->open($templateOdt) !== TRUE) {
    die("Fehler beim Öffnen von $templateOdt\n");
}
$zip->extractTo($tmpDir);
$zip->close();

// 2. Bild nach Pictures kopieren
if (!is_dir("$tmpDir/Pictures")) {
    mkdir("$tmpDir/Pictures");
}
copy($imageFile, "$tmpDir/Pictures/qrcode.png");

// 3. manifest.xml aktualisieren (WICHTIG!)
$manifestFile = "$tmpDir/META-INF/manifest.xml";
$manifest = file_get_contents($manifestFile);
// Prüfen ob Eintrag schon existiert
if (strpos($manifest, 'Pictures/qrcode.png') === false) {
    $newEntry = '<manifest:file-entry manifest:media-type="image/png" manifest:full-path="Pictures/qrcode.png"/>';
    $manifest = str_replace('</manifest:manifest>', $newEntry . "\n</manifest:manifest>", $manifest);
    file_put_contents($manifestFile, $manifest);
}

// 4. content.xml laden
$contentFile = "$tmpDir/content.xml";
$content = file_get_contents($contentFile);

// 5. Bild-XML (ODF-konform)
$imageXml = '<draw:frame draw:name="QRCode" text:anchor-type="as-char" svg:width="2cm" svg:height="2cm" fo:border="0.05cm solid #000000" fo:padding="0.1cm">' .
'<draw:image xlink:href="Pictures/qrcode.png" xlink:type="simple" xlink:show="embed" xlink:actuate="onLoad"/>' .
'</draw:frame>';

// {qrcode} ersetzen
$content = str_replace('{qrcode}', $imageXml, $content);
file_put_contents($contentFile, $content);

// 6. Neue ODT bauen
$zip = new ZipArchive();
if ($zip->open($outputOdt, ZipArchive::CREATE | ZipArchive::OVERWRITE) !== TRUE) {
    die("Fehler beim Erstellen von $outputOdt\n");
}

// 6a. mimetype MUSS zuerst & unkomprimiert
$zip->addFile("$tmpDir/mimetype", "mimetype");
$zip->setCompressionName("mimetype", ZipArchive::CM_STORE);

// 6b. Restliche Dateien rekursiv hinzufügen
$files = new RecursiveIteratorIterator(
    new RecursiveDirectoryIterator($tmpDir, RecursiveDirectoryIterator::SKIP_DOTS),
                                       RecursiveIteratorIterator::LEAVES_ONLY
);

foreach ($files as $file) {
    if (!$file->isFile()) continue;
    $filePath = $file->getRealPath();
    $relativePath = substr($filePath, strlen($tmpDir) + 1);

    // mimetype überspringen (schon hinzugefügt)
    if ($relativePath === 'mimetype') continue;

    // Backslashes zu Forward-Slashes (für Windows-Kompatibilität)
    $relativePath = str_replace('\\', '/', $relativePath);

    $zip->addFile($filePath, $relativePath);
}

$zip->close();

// 7. Cleanup
function deleteDir($dir) {
    if (!is_dir($dir)) return;
    foreach (scandir($dir) as $item) {
        if ($item == '.' || $item == '..') continue;
        $path = "$dir/$item";
        is_dir($path) ? deleteDir($path) : unlink($path);
    }
    rmdir($dir);
}
deleteDir($tmpDir);

echo "Fertig: $outputOdt\n";