*/
/**
* Browsersprache ermitteln
*
* @param array $allowed_languages Array of allowed languages.
* @param string $default_language Language code of the default language.
* @param string|null $lang_variable Already set language variable.
* @param boolean $strict_mode Whether to demand de (false) or de-de.
*
* @return string
*/
function lang_getfrombrowser(array $allowed_languages, string $default_language, $lang_variable = null, bool $strict_mode = true) {
// $_SERVER['HTTP_ACCEPT_LANGUAGE'] verwenden, wenn keine Sprachvariable mitgegeben wurde
if ($lang_variable === null) {
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) $lang_variable = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
}
// wurde irgendwelche Information mitgeschickt?
if (empty($lang_variable)) {
// Nein? => Standardsprache zurückgeben
return $default_language;
}
// Den Header auftrennen
$accepted_languages = preg_split('/,\s*/', $lang_variable);
// Die Standardwerte einstellen
$current_lang = $default_language;
$current_q = 0;
// Nun alle mitgegebenen Sprachen abarbeiten
foreach ($accepted_languages as $accepted_language) {
// Alle Infos über diese Sprache rausholen
$res = preg_match('/^([a-z]{1,8}(?:-[a-z]{1,8})*)' . '(?:;\s*q=(0(?:\.[0-9]{1,3})?|1(?:\.0{1,3})?))?$/i', $accepted_language, $matches
);
// war die Syntax gültig?
if (!$res) {
// Nein? Dann ignorieren
continue;
}
// Sprachcode holen und dann sofort in die Einzelteile trennen
$lang_code = explode('-', $matches[1]);
// Wurde eine Qualität mitgegeben?
if (isset($matches[2])) {
// die Qualität benutzen
$lang_quality = (float)$matches[2];
} else {
// Kompabilitätsmodus: Qualität 1 annehmen
$lang_quality = 1.0;
}
// Bis der Sprachcode leer ist...
while (count($lang_code)) {
// mal sehen, ob der Sprachcode angeboten wird
if (in_array(strtolower(join('-', $lang_code)), $allowed_languages)) {
// Qualität anschauen
if ($lang_quality > $current_q) {
// diese Sprache verwenden
$current_lang = strtolower(join ('-', $lang_code));
$current_q = $lang_quality;
// Hier die innere while-Schleife verlassen
break;
}
}
// Wenn wir im strengen Modus sind, die Sprache nicht versuchen zu minimalisieren
if ($strict_mode) {
// innere While-Schleife aufbrechen
break;
}
// den rechtesten Teil des Sprachcodes abschneiden
array_pop($lang_code);
}
}
// die gefundene Sprache zurückgeben
return $current_lang;
}
/**
* Function ensureDir checks if a directory exists, and creates it if it does not yet.
*
* @param string $filepath File path.
*
* @return void
*/
function ensureDir(string $filepath) {
if (!is_dir($filepath)) mkdir($filepath);
}
/**
* Function ensureJson checks that a JSON file exists. If not, it creates an empty one at the specified location.
*
* @param string $filepath File path to the JSON file.
*
* @return void
*/
function ensureJson(string $filepath) {
if (!file_exists($filepath) or filesize($filepath) < 2) {
file_put_contents($filepath, "[]");
}
}
/**
* Function ensuring the existence of all required files and folders.
*
* @return void
*/
function ensureEnvironment() {
$dirs = [
"contents",
"pdf",
"tex"
];
foreach ($dirs as $dir) {
ensureDir(__DIR__ . "/$dir");
}
}
/**
* Function transform escapes a string for printing in TeX
*
* @param string $transform String to transform.
*
* @return string
*/
function transform(string $transform):string {
$transform = preg_replace('#
#', ' ', $transform);
$transform = preg_replace('##', ' ', $transform);
$transform = preg_replace('#
#', ' ', $transform);
$transform = preg_replace('#’#', '\'', $transform);
$transform = preg_replace('#' . chr(11) . '#', ' ', $transform);
$transform = preg_replace('#"#', '"', $transform);
$transform = preg_replace('#&#', '&', $transform);
$transform = preg_replace('#•#', '•', $transform);
$transform = preg_replace('#' . chr(9) . '#', '', $transform);
$transform = str_replace('&', '\\&', $transform);
$transform = str_replace('{', '\\{', $transform);
$transform = str_replace('}', '\\}', $transform);
$transform = str_replace('_', '\\_', $transform);
$transform = preg_replace('#Ä#', 'Ä', $transform);
$transform = preg_replace('#À#', 'À', $transform);
$transform = preg_replace('#Á#', 'Á', $transform);
$transform = preg_replace('#à#', 'à', $transform);
$transform = preg_replace('#á#', 'á', $transform);
$transform = preg_replace('#ä#', 'ä', $transform);
$transform = preg_replace('#Ö#', 'Ö', $transform);
$transform = preg_replace('#Ò#', 'Ò', $transform);
$transform = preg_replace('#Ó#', 'Ó', $transform);
$transform = preg_replace('#ò#', 'ò', $transform);
$transform = preg_replace('#ó#', 'ó', $transform);
$transform = preg_replace('#ö#', 'ö', $transform);
$transform = preg_replace('#Ü#', 'Ü', $transform);
$transform = preg_replace('#Ù#', 'Ù', $transform);
$transform = preg_replace('#Ú#', 'Ú', $transform);
$transform = preg_replace('#ù#', 'ù', $transform);
$transform = preg_replace('#ú#', 'ú', $transform);
$transform = preg_replace('#ü#', 'ü', $transform);
$transform = preg_replace('#ß#', 'ß', $transform);
$transform = preg_replace('#Ç#', 'Ç', $transform);
$transform = preg_replace('#ç#', 'ç', $transform);
$transform = preg_replace('#’#', '´', $transform);
$transform = preg_replace('#é#', 'é', $transform);
$transform = preg_replace('#è#', 'è', $transform);
foreach (["[", "]"] as $toescape)
$transform = str_replace ($toescape, "$" . $toescape . "$", $transform);
$transform = html_entity_decode($transform, ENT_QUOTES, "utf-8" );
return $transform;
}
/**
* Function scanDirConts is a wrapper around scandir(), which removes [".", ".."].
*
* @param string $folder Folder to scan.
*
* @return string[]
*/
function scanDirConts(string $folder) {
return array_values(array_diff(scandir($folder), [".", "..", ".git"]));
}
// Generating PDFs
/**
* Function copyFolder copies a folder including all its contents.
*
* @param string $from Source location.
* @param string $to Target location.
*
* @return void
*/
function copyFolder(string $from, string $to) {
mkdir($to);
foreach (array_diff(scandir("$from"), [".", ".."]) as $file) {
copy("$from/$file", "$to/$file");
}
}
/**
* Function removeFolder deletes a folder including all its contents.
*
* @param string $folder Folder location.
*
* @return void
*/
function removeFolder(string $folder) {
foreach (array_diff(scandir("$folder"), [".", ".."]) as $file) {
if (is_dir("$folder/$file")) removeFolder("$folder/$file");
else unlink("$folder/$file");
}
rmdir($folder);
}
/**
* Function removeFolder deletes a folder including all its contents.
* It stops if a subfolder is younger than 60 seconds
*
* @param string $folder Folder location.
* @param string $exclude Folder for which time should not be checked.
*
* @return boolean
*/
function removeFolderGently(string $folder, string $exclude) {
foreach (array_diff(scandir("$folder"), [".", ".."]) as $file) {
if (time() - filemtime("$folder/$file") < 10 and $file != $exclude) continue;
if (is_dir("$folder/$file")) $output = removeFolder("$folder/$file");
else if (!is_dir("$folder/$file")) unlink("$folder/$file");
}
if (count(array_diff(scandir("$folder"), [".", ".."])) == 0) rmdir($folder);
return $output;
}
/**
* Function runPDF runs LaTeX to generate a PDF file and then serves said file.
* It also does the subsequent cleanup by deleting the folder the PDF was generated in afterwards.
*
* @param string $folder Determines the folder (say, template) to use for PDF generation.
* @param string $texFilename Name of the TeX file. Used without its ending.
* @param string $filename Filename as it should be shown to the user.
* @param array $pdfSettings Additional parameters to use \def for.
* @param string $lang Language. Optional.
* @param boolean $debug Enables/disables debug mode. Optional.
*
* @return void
*/
function runPDF(string $folder, string $texFilename, string $filename, array $pdfSettings, string $lang = "de", bool $debug = false) {
if (!is_dir("./tmp")) mkdir("./tmp");
/* Eine eindeutige ID, beispielsweise: 4b3403665fea6 */
$uniqid = uniqid("PDF_");
copyFolder("$folder", "./tmp/$uniqid");
copy("$texFilename.tex", "./tmp/$uniqid/$texFilename.tex");
$generateUserSettings = function($lang, $pdfSettings) {
$babelPackages = [
"en" => "english",
"de" => "german",
"es" => "spanish",
"hu" => "hungarian"
];
if (in_array($lang, $babelPackages)) $lan = $lang;
else $lan = "en";
return '\\usepackage[' . $babelPackages[$lan] . ']{babel}
\\def \\pageTitle {' . transform($pdfSettings['title']) . '}' . PHP_EOL . '
\\def \\pageTitleImg {' . transform($pdfSettings['bgImg']) . '}' . PHP_EOL;
};
$userSettings = $generateUserSettings($lang, $pdfSettings);
file_put_contents("./tmp/$uniqid/pdfSettings.tex", $userSettings);
chdir("./tmp/$uniqid");
// Right now, pdflatex needs to be used. Once new packages are available, xelatex is to be preferred.
exec("pdflatex -interaction nonstopmode -pdf -pv $texFilename.tex");
ensureDir(__DIR__ . "/pdf/$lang");
// Move output file to PDF directory.
if (file_exists(__DIR__ . "/pdf/$lang/$filename.pdf")) unlink(__DIR__ . "/pdf/$lang/$filename.pdf");
rename("$filename.pdf", __DIR__ . "/pdf/$lang/$filename.pdf");
# header("Content-type:application/pdf");
# header("Content-Disposition:inline;filename=$filename");
# readfile ("$texFilename.pdf");
chdir(__DIR__);
if (!$debug) removeFolderGently("./tmp", $uniqid);
}
// HTML Stuff
/**
* Function getHTMLHead returns the HTML for the top of the page.
*
* @param string $title Title of the page.
* @param string $contents Page contents.
* @param string $lang Language. Optional.
* @param array $availableLangs Page description. Optional.
* @param string $descriptions Page description. Optional.
* @param string $pdfLink Link to brochure. Optional.
*
* @return string
*/
function printHTMLPage(string $title, string $contents, string $lang = "en", array $availableLangs = ["en"], string $descriptions = "", string $pdfLink = "brochure"):string {
$output = '
' . $title . '
';
$output .= $contents . '
';
return $output;
}