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@@ -0,0 +1,239 @@
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+<?php
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+
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+
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+ /**
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+ * Selects the language the page will be displayed on.
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+ *
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+ * First, it tries to read the language cookie in the client. If none is
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+ * set, get the browser language preference list. If none is provided or
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+ * they are not supported, it will use the default language.
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+ *
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+ * @param db Connection to the database.
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+ * @return Lowercase, two-letter language code.
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+ */
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+ function select_language($db){
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+
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+ // Get available languages from db
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+ $available_languages = array();
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+ // TODO: FIX
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+ array_push($available_languages, "es");
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+ array_push($available_languages, "en");
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+ array_push($available_languages, "eu");
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+ //$q_lang = mysqli_query($db, "SELECT code FROM lang WHERE active = 1;");
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+ //while ($r_lang = mysqli_fetch_array($q_lang)){
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+ // array_push($available_languages, $r_lang["code"]);
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+ //}
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+
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+ // Is there a language cookie installed on the client?.
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+ header("Cache-control: private");
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+ if (isSet($_COOKIE["lang"])){
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+ $lang = $_COOKIE["lang"];
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+ if (in_array($lang, $available_languages)){
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+ return $lang;
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+ }
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+ }
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+
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+ // If no cookie, select from client browser preferences.
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+ $lang = prefered_language($available_languages, $_SERVER["HTTP_ACCEPT_LANGUAGE"]);
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+ if (in_array($lang, $available_languages)){
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+ return $lang;
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+ }
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+
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+ // If no method was succesfull, default language
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+ $lang = $available_languages[0];
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+ return $lang;
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+ }
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+
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+
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+ /**
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+ * Parses the language prefrences of the client broser, comparing them to
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+ * the languages offered by the site and selects the prefered one among
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+ * the ones supported.
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+ *
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+ * @param available_languages List of lowercase, two-letter language codes
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+ * allowed by the site.
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+ * @param http_accept_language Raw header with info about client language
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+ * preferences.
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+ * @return Lowercase, two-letter code of the prefered available language.
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+ */
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+ function prefered_language(array $available_languages, $http_accept_language) {
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+
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+ $available_languages = array_flip($available_languages);
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+
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+ $langs = array();
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+ preg_match_all("~([\w-]+)(?:[^,\d]+([\d.]+))?~", strtolower($http_accept_language), $matches, PREG_SET_ORDER);
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+ foreach($matches as $match) {
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+
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+ list($a, $b) = explode("-", $match[1]) + array("", "");
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+ $value = isset($match[2]) ? (float) $match[2] : 1.0;
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+
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+ if(isset($available_languages[$match[1]])) {
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+ $langs[$match[1]] = $value;
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+ continue;
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+ }
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+
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+ if(isset($available_languages[$a])) {
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+ $langs[$a] = $value - 0.1;
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+ }
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+
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+ }
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+ if (sizeof($langs) > 0){
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+ arsort($langs);
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+ //return $langs[0];
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+ array_values($langs)[0];
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+ }
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+ else{
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+ return 'en';
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+ }
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+ }
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+
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+
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+ /**
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+ * Turns a date string into a human readable string on the specified
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+ * language. Only works for spanish, basque and english.
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+ *
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+ * @param str_date Date string ('yyyy-mm-dd' or 'yyyy-mm-dd HH:MM:SS')
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+ * @param lang Language code (es, en, eu).
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+ * @param time Boolean to append the time at the end (by default, it does)
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+ * @return Formatted date string.
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+ */
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+ function format_date($str_date, $lang, $time = true){
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+ $date = strtotime($str_date);
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+ $year = date("o", $date);
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+ $month = date("n", $date);
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+ $month --;
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+ $day = date("j", $date);
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+ $wday = date("N", $date);
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+ $wday --;
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+ $hour = date("H", $date);
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+ $minute = date("i", $date);
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+ switch ($lang){
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+ case "en":
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+ $week = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"];
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+ $months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
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+ if ($time){
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+ $str = "$week[$wday], $months[$month] $day, $year at $hour:$minute";
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+ }
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+ else{
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+ $str = "$week[$wday], $months[$month] $day, $year";
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+ }
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+ break;
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+ case "eu":
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+ $week = ["astelehena", "asteartea", "asteazkena", "osteguna", "ostirala", "larumbata", "igandea"];
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+ $months = ["urtarrilaren", "otsailaren", "martxoaren", "apirilaren", "maiatzaren", "ekainaren", "uztailaren", "abuztuaren", "irailaren", "urriaren", "azaroaren", "abenduaren"];
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+ if ($time){
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+ $str = $year . "ko $months[$month] $day" . "an, $week[$wday], $hour:$minute";
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+ }
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+ else{
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+ $str = $year . "ko $months[$month] $day" . "an, $week[$wday]";
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+ }
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+ break;
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+ default:
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+ $week = ["Lunes", "Martes", "Miércoles", "Jueves", "Viernes", "Sábado", "Domingo"];
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+ $months = ["enero", " febrero", "marzo", "abril", "mayo", "junio", "julio", "agosto", "septiembre", "octubre", "noviembre", "diciembre"];
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+ if ($time){
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+ $str = "$week[$wday] $day de $months[$month] de $year a las $hour:$minute";
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+ }
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+ else{
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+ $str = "$week[$wday] $day de $months[$month] de $year";
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+ }
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+ }
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+ return $str;
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+ }
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+
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+
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+ /**
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+ * Retrieves a text fragment from the database.
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+ *
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+ * @param model An initialized data model.
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+ * @param id Text identifier.
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+ * @returns The text.
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+ */
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+ function text($model, $id){
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+ global $path;
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+ $q = mysqli_query($model->db, "SELECT text, file FROM text WHERE id = '$id' AND lang = '" . $model->lang . "';");
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+ $r = mysqli_fetch_array($q);
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+ if (strlen($r["file"]) > 0){
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+ return file_get_contents($path["string"] . $r["file"]);
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+ }
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+ else{
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+ return $r["text"];
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+ }
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+ }
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+
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+
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+ /**
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+ * This function closes all the opened HTML tags in a given string.
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+ *
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+ * @param html The string with HTML tags.
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+ * @return HTML with closed tags.
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+ */
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+ function close_tags($html) {
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+ $result = [];
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+ preg_match_all("#<(?!meta|img|br|hr|input\b)\b([a-z]+)(?: .*)?(?<![/|/ ])>#iU", $html, $result);
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+ $openedtags = $result[1];
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+ preg_match_all("#</([a-z]+)>#iU", $html, $result);
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+ $closedtags = $result[1];
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+ $len_opened = count($openedtags);
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+ if (count($closedtags) == $len_opened) {
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+ return $html;
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+ }
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+ $openedtags = array_reverse($openedtags);
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+ for ($i=0; $i < $len_opened; $i++) {
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+ if (!in_array($openedtags[$i], $closedtags)) {
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+ $html .= "</".$openedtags[$i].">";
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+ } else {
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+ unset($closedtags[array_search($openedtags[$i], $closedtags)]);
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+ }
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+ }
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+ return $html;
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+ }
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+
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+
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+ /**
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+ * Text shortener. Given a string, it trims in the proximity of the
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+ * desired string, up to the next white character. If indicated, it will
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+ * append a link to the full text.
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+ *
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+ * @param text The text to shorten.
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+ * @param length The desired length.
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+ * @param link_text Text for the link. Optional.
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+ * @param link URI of the link.
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+ * @return Shortened text.
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+ */
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+ function cut_text($text, $length, $link_text = "", $link = ""){
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+ if (strlen($text) < $length){
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+ return $text;
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+ }
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+ $cut = substr($text, 0, strpos($text, " ", $length));
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+ $cut = close_tags($cut);
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+ if (strlen($cut) == 0){
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+ $cut = $text;
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+ }
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+ if (strlen($text) != strlen($cut) && strlen($link) > 0 && strlen($link_text) > 0){
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+ $cut = $cut . "... <a href='$link'>$link_text</a>";
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+ }
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+ return $cut;
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+ }
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+
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+ /**
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+ * Creates the srcset attribute for content images.
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+ * Creates 9 different resolutions, from 100px to 900px.
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+ *
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+ * @param file Path to the file, relative to $path["img"]["content"]).
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+ * @return srcset atttribute content.
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+ */
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+ function srcset($file){
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+ global $static;
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+ $srcset = "";
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+ $dir = dirname($file);
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+ $name = basename($file);
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+ foreach (range(1, 9) as $d) {
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+ $srcset = $srcset . $static["content"] . $dir . "/x" . $d . "00/" . $name . " " . $d . "00px, ";
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+ }
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+ $srcset = rtrim($srcset, ", ");
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+ return $srcset;
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+ }
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+
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+?>
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+
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