367 lines
12 KiB
PHP
367 lines
12 KiB
PHP
<?PHP
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/**
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* Main functions file.
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*
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* @author Joshua Ramon Enslin <joshua@jrenslin.de>
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*/
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/**
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* Browsersprache ermitteln
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*
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* @param array $allowed_languages Array of allowed languages
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* @param string $default_language Language code of the default language
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* @param string $lang_variable Already set language variable
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* @param bool $strict_mode Whether to demand de (false) or de-de
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*
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* @return string
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*/
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function lang_getfrombrowser($allowed_languages, $default_language, $lang_variable = null, $strict_mode = true) {
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// $_SERVER['HTTP_ACCEPT_LANGUAGE'] verwenden, wenn keine Sprachvariable mitgegeben wurde
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if ($lang_variable === null) {
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if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) $lang_variable = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
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}
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// wurde irgendwelche Information mitgeschickt?
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if (empty($lang_variable)) {
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// Nein? => Standardsprache zurückgeben
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return $default_language;
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}
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// Den Header auftrennen
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$accepted_languages = preg_split('/,\s*/', $lang_variable);
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// Die Standardwerte einstellen
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$current_lang = $default_language;
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$current_q = 0;
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// Nun alle mitgegebenen Sprachen abarbeiten
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foreach ($accepted_languages as $accepted_language) {
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// Alle Infos über diese Sprache rausholen
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$res = preg_match('/^([a-z]{1,8}(?:-[a-z]{1,8})*)'.
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'(?:;\s*q=(0(?:\.[0-9]{1,3})?|1(?:\.0{1,3})?))?$/i', $accepted_language, $matches
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);
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// war die Syntax gültig?
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if (!$res) {
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// Nein? Dann ignorieren
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continue;
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}
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// Sprachcode holen und dann sofort in die Einzelteile trennen
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$lang_code = explode('-', $matches[1]);
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// Wurde eine Qualität mitgegeben?
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if (isset($matches[2])) {
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// die Qualität benutzen
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$lang_quality = (float)$matches[2];
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} else {
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// Kompabilitätsmodus: Qualität 1 annehmen
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$lang_quality = 1.0;
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}
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// Bis der Sprachcode leer ist...
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while (count($lang_code)) {
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// mal sehen, ob der Sprachcode angeboten wird
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if (in_array(strtolower(join('-', $lang_code)), $allowed_languages)) {
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// Qualität anschauen
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if ($lang_quality > $current_q) {
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// diese Sprache verwenden
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$current_lang = strtolower(join ('-', $lang_code));
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$current_q = $lang_quality;
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// Hier die innere while-Schleife verlassen
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break;
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}
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}
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// Wenn wir im strengen Modus sind, die Sprache nicht versuchen zu minimalisieren
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if ($strict_mode) {
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// innere While-Schleife aufbrechen
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break;
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}
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// den rechtesten Teil des Sprachcodes abschneiden
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array_pop($lang_code);
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}
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}
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// die gefundene Sprache zurückgeben
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return $current_lang;
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}
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/**
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* Function ensureDir checks if a directory exists, and creates it if it does not yet.
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*
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* @param string $filepath File path.
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*
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* @return void
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*/
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function ensureDir($filepath) {
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if (!is_dir($filepath)) mkdir($filepath);
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}
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/**
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* Function ensureJson checks that a JSON file exists. If not, it creates an empty one at the specified location.
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*
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* @param string $filepath File path to the JSON file.
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*
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* @return void
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*/
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function ensureJson($filepath) {
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if (!file_exists($filepath) or filesize($filepath) < 2) {
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file_put_contents($filepath, "[]");
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}
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}
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/**
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* Function ensuring the existence of all required files and folders.
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*
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* @return void
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*/
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function ensureEnvironment() {
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$dirs = [
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"contents",
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"pdf",
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"tex"
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];
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foreach ($dirs as $dir) {
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ensureDir(__DIR__ . "/$dir");
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}
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}
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/**
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* Function transform escapes a string for printing in TeX
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*
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* @param string $transform String to transform
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*
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* @return string
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*/
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function transform($transform) {
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$transform = preg_replace('#<br>#', ' ', $transform);
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$transform = preg_replace('#</br>#', ' ', $transform);
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$transform = preg_replace('#<br />#', ' ', $transform);
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$transform = preg_replace('#’#', '\'', $transform);
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$transform = preg_replace('#'.chr(11).'#', ' ', $transform);
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$transform = preg_replace('#"#', '"', $transform);
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$transform = preg_replace('#&#', '&', $transform);
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$transform = preg_replace('#•#', '•', $transform);
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$transform = preg_replace('#'.chr(9).'#', '', $transform);
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$transform = str_replace('&', '\\&', $transform);
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$transform = str_replace('{', '\\{', $transform);
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$transform = str_replace('}', '\\}', $transform);
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$transform = str_replace('_', '\\_', $transform);
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$transform = preg_replace('#Ä#', 'Ä', $transform);
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$transform = preg_replace('#À#', 'À', $transform);
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$transform = preg_replace('#Á#', 'Á', $transform);
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$transform = preg_replace('#à#', 'à', $transform);
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$transform = preg_replace('#á#', 'á', $transform);
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$transform = preg_replace('#ä#', 'ä', $transform);
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$transform = preg_replace('#Ö#', 'Ö', $transform);
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$transform = preg_replace('#Ò#', 'Ò', $transform);
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$transform = preg_replace('#Ó#', 'Ó', $transform);
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$transform = preg_replace('#ò#', 'ò', $transform);
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$transform = preg_replace('#ó#', 'ó', $transform);
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$transform = preg_replace('#ö#', 'ö', $transform);
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$transform = preg_replace('#Ü#', 'Ü', $transform);
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$transform = preg_replace('#Ù#', 'Ù', $transform);
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$transform = preg_replace('#Ú#', 'Ú', $transform);
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$transform = preg_replace('#ù#', 'ù', $transform);
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$transform = preg_replace('#ú#', 'ú', $transform);
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$transform = preg_replace('#ü#', 'ü', $transform);
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$transform = preg_replace('#ß#', 'ß', $transform);
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$transform = preg_replace('#Ç#', 'Ç', $transform);
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$transform = preg_replace('#ç#', 'ç', $transform);
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$transform = preg_replace('#’#', '´', $transform);
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$transform = preg_replace('#é#', 'é', $transform);
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$transform = preg_replace('#è#', 'è', $transform);
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foreach (array("[", "]") as $toescape)
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$transform = str_replace ($toescape, "$".$toescape."$", $transform);
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$transform = html_entity_decode($transform, ENT_QUOTES, "utf-8" );
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return $transform;
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}
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/**
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* Function scanDirConts is a wrapper around scandir(), which removes [".", ".."].
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*
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* @param string $folder Folder to scan.
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*
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* @return string[]
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*/
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function scanDirConts($folder) {
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return array_values(array_diff(scandir($folder), [".", "..", ".git"]));
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}
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// Generating PDFs
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/**
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* Function copyFolder copies a folder including all its contents.
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*
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* @param string $from Source location.
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* @param string $to Target location.
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*
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* @return void
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*/
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function copyFolder($from, $to) {
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mkdir ($to);
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foreach (array_diff(scandir("$from"), [".", ".."]) as $file) {
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copy("$from/$file", "$to/$file");
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}
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}
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/**
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* Function removeFolder deletes a folder including all its contents.
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*
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* @param string $folder Folder location.
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*
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* @return void
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*/
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function removeFolder($folder) {
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foreach (array_diff(scandir("$folder"), [".", ".."]) as $file) {
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if (is_dir("$folder/$file")) removeFolder("$folder/$file");
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else unlink("$folder/$file");
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}
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rmdir($folder);
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}
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/**
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* Function removeFolder deletes a folder including all its contents.
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* It stops if a subfolder is younger than 60 seconds
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*
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* @param string $folder Folder location.
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* @param string $exclude Folder for which time should not be checked.
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*
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* @return boolean
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*/
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function removeFolderGently($folder, $exclude) {
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foreach (array_diff(scandir("$folder"), [".", ".."]) as $file) {
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if (time() - filemtime("$folder/$file") < 10 and $file != $exclude) continue;
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if (is_dir("$folder/$file")) $output = removeFolder("$folder/$file");
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else if (!is_dir("$folder/$file")) unlink("$folder/$file");
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}
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if (count(array_diff(scandir("$folder"), [".", ".."])) == 0) rmdir($folder);
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return $output;
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}
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/**
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* Function runPDF runs LaTeX to generate a PDF file and then serves said file.
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* It also does the subsequent cleanup by deleting the folder the PDF was generated in afterwards.
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*
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* @param string $folder Determines the folder (say, template) to use for PDF generation.
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* @param string $texFilename Name of the TeX file. Used without its ending.
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* @param string $filename Filename as it should be shown to the user.
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* @param boolean $title Title of the overall output.
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* @param boolean $lang Language. Optional.
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* @param boolean $debug Enables/disables debug mode. Optional.
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*
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* @return void
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*/
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function runPDF($folder, $texFilename, $filename, $title, $lang = "de", $debug = false) {
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if (!is_dir("./tmp")) mkdir("./tmp");
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/* Eine eindeutige ID, beispielsweise: 4b3403665fea6 */
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$uniqid = uniqid("PDF_");
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copyFolder("$folder", "./tmp/$uniqid");
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copy("brochure.tex", "./tmp/$uniqid/brochure.tex");
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$generateUserSettings = function($lang, $title) {
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$babelPackages = [
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"en" => "english",
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"de" => "german",
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"es" => "spanish",
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"hu" => "hungarian"
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];
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if (in_array($lang, $babelPackages)) $lan = $lang;
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else $lan = "en";
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return '\\usepackage[' . $babelPackages[$lan] . ']{babel}
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\\def \\pageTitle {' . transform($title) . '}' . PHP_EOL;
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};
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$userSettings = $generateUserSettings($lang, $title);
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file_put_contents("./tmp/$uniqid/pdfSettings.tex", $userSettings);
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chdir("./tmp/$uniqid");
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// Right now, pdflatex needs to be used. Once new packages are available, xelatex is to be preferred.
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exec("pdflatex -interaction nonstopmode $texFilename.tex");
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ensureDir(__DIR__ . "/pdf/$lang");
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// Move output file to PDF directory.
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if (file_exists(__DIR__ . "/pdf/$lang/brochure.pdf")) unlink(__DIR__ . "/pdf/$lang/brochure.pdf");
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rename("brochure.pdf", __DIR__ . "/pdf/$lang/brochure.pdf");
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# header("Content-type:application/pdf");
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# header("Content-Disposition:inline;filename=$filename");
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# readfile ("$texFilename.pdf");
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chdir(__DIR__);
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if (!$debug) removeFolderGently("./tmp", $uniqid);
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}
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// HTML Stuff
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/**
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* Function getHTMLHead returns the HTML for the top of the page.
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*
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* @param string $title Title of the page.
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* @param string $contents Page contents.
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* @param string $lang Language. Optional
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* @param string $descriptions Page description. Optional.
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*
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* @return string
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*/
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function printHTMLPage(string $title, string $contents, string $lang = "en", string $descriptions = "") {
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$output = '<!DOCTYPE html>
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<html lang="' . $lang . '">
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1" />
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<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
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<meta charset="UTF-8" />
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<link rel="shortcut icon" sizes="16x16 32x32" href="./db_images_gestaltung/mdlogo-32px.png" />
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<link rel="shortcut icon" sizes="64x64" href="./db_images_gestaltung/mdlogo-64px.png" /><link rel="stylesheet" type="text/css" href="css/main.css">
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<meta name="twitter:title" content="' . $title. '" />
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<meta property="og:title" content="' . $title. '" />
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<title>' . $title. '</title>
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<meta name="twitter:card" content="summary" />
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<meta name="twitter:site" content="@museumdigital" />
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<meta name="description" content="' . $descriptions . '" />
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<meta name="twitter:description" content="' . $descriptions . '" />
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<link rel="stylesheet" type="text/css" href="css/main.css">
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</head>
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<body id="start">
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<nav id="mainNav">
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<a href="#start">Top</a>
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<a href="#bottom"></a>
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</nav>
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';
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$output .= $contents . '
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<footer id="bottom">
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<a href="pdf/' . $lang . '/brochure.pdf" class="buttonLike">PDF</a>
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</footer>
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</html>';
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return $output;
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}
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?>
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