Merge pull request #779 from ArthurHoaro/feature/import-parser-logs

[github/shaarli/Shaarli.git] / application / Utils.php

diff --git a/application/Utils.php b/application/Utils.php
index 35d652241bb6a5a4c42c7ded7b7381be48dc7f15..5c077450e3a65016f55b0ede559dad4552b47e2b 100644 (file)
--- a/application/Utils.php
+++ b/application/Utils.php
@@ -216,20 +216,63 @@ function is_session_id_valid($sessionId)
 function autoLocale($headerLocale)
 {
     // Default if browser does not send HTTP_ACCEPT_LANGUAGE
-    $attempts = array('en_US');
-    if (isset($headerLocale)) {
-        // (It's a bit crude, but it works very well. Preferred language is always presented first.)
-        if (preg_match('/([a-z]{2})-?([a-z]{2})?/i', $headerLocale, $matches)) {
-            $loc = $matches[1] . (!empty($matches[2]) ? '_' . strtoupper($matches[2]) : '');
-            $attempts = array(
-                $loc.'.UTF-8', $loc, str_replace('_', '-', $loc).'.UTF-8', str_replace('_', '-', $loc),
-                $loc . '_' . strtoupper($loc).'.UTF-8', $loc . '_' . strtoupper($loc),
-                $loc . '_' . $loc.'.UTF-8', $loc . '_' . $loc, $loc . '-' . strtoupper($loc).'.UTF-8',
-                $loc . '-' . strtoupper($loc), $loc . '-' . $loc.'.UTF-8', $loc . '-' . $loc
-            );
+    $locales = array('en_US', 'en_US.utf8', 'en_US.UTF-8');
+    if (! empty($headerLocale)) {
+        if (preg_match_all('/([a-z]{2,3})[-_]?([a-z]{2})?,?/i', $headerLocale, $matches, PREG_SET_ORDER)) {
+            $attempts = [];
+            foreach ($matches as $match) {
+                $first = [strtolower($match[1]), strtoupper($match[1])];
+                $separators = ['_', '-'];
+                $encodings = ['utf8', 'UTF-8'];
+                if (!empty($match[2])) {
+                    $second = [strtoupper($match[2]), strtolower($match[2])];
+                    $items = [$first, $separators, $second, ['.'], $encodings];
+                } else {
+                    $items = [$first, $separators, $first, ['.'], $encodings];
+                }
+                $attempts = array_merge($attempts, iterator_to_array(cartesian_product_generator($items)));
+            }
+
+            if (! empty($attempts)) {
+                $locales = array_merge(array_map('implode', $attempts), $locales);
+            }
+        }
+    }
+
+    setlocale(LC_ALL, $locales);
+}
+
+/**
+ * Build a Generator object representing the cartesian product from given $items.
+ *
+ * Example:
+ *   [['a'], ['b', 'c']]
+ * will generate:
+ *   [
+ *      ['a', 'b'],
+ *      ['a', 'c'],
+ *   ]
+ *
+ * @param array $items array of array of string
+ *
+ * @return Generator representing the cartesian product of given array.
+ *
+ * @see https://en.wikipedia.org/wiki/Cartesian_product
+ */
+function cartesian_product_generator($items)
+{
+    if (empty($items)) {
+        yield [];
+    }
+    $subArray = array_pop($items);
+    if (empty($subArray)) {
+        return;
+    }
+    foreach (cartesian_product_generator($items) as $item) {
+        foreach ($subArray as $value) {
+            yield $item + [count($item) => $value];
         }
     }
-    setlocale(LC_ALL, $attempts);
 }
 
 /**
@@ -270,3 +313,33 @@ function normalize_spaces($string)
 {
     return preg_replace('/\s{2,}/', ' ', trim($string));
 }
+
+/**
+ * Format the date according to the locale.
+ *
+ * Requires php-intl to display international datetimes,
+ * otherwise default format '%c' will be returned.
+ *
+ * @param DateTime $date to format.
+ * @param bool     $intl Use international format if true.
+ *
+ * @return bool|string Formatted date, or false if the input is invalid.
+ */
+function format_date($date, $intl = true)
+{
+    if (! $date instanceof DateTime) {
+        return false;
+    }
+
+    if (! $intl || ! class_exists('IntlDateFormatter')) {
+        return strftime('%c', $date->getTimestamp());
+    }
+
+    $formatter = new IntlDateFormatter(
+        setlocale(LC_TIME, 0),
+        IntlDateFormatter::LONG,
+        IntlDateFormatter::LONG
+    );
+
+    return $formatter->format($date);
+}