1 files changed, 127 insertions, 0 deletions
diff --git a/vendor/ipl/i18n/src/Locale.php b/vendor/ipl/i18n/src/Locale.php
new file mode 100644
index 0000000..48e345f
--- /dev/null
+++ b/vendor/ipl/i18n/src/Locale.php
@@ -0,0 +1,127 @@
+<?php
+
+namespace ipl\I18n;
+
+use ipl\Stdlib\Str;
+use stdClass;
+
+class Locale
+{
+    /** @var string Default locale code */
+    protected $defaultLocale = 'en_US';
+
+    /**
+     * Get the default locale
+     *
+     * @return string
+     */
+    public function getDefaultLocale()
+    {
+        return $this->defaultLocale;
+    }
+
+    /**
+     * Set the default locale
+     *
+     * @param string $defaultLocale
+     *
+     * @return $this
+     */
+    public function setDefaultLocale($defaultLocale)
+    {
+        $this->defaultLocale = $defaultLocale;
+
+        return $this;
+    }
+
+    /**
+     * Return the preferred locale based on the given HTTP header and the available translations
+     *
+     * @param string $header    The HTTP "Accept-Language" header
+     * @param array<string> $available Available translations
+     *
+     * @return string The browser's preferred locale code
+     */
+    public function getPreferred($header, array $available)
+    {
+        $headerValues = Str::trimSplit($header, ',');
+        for ($i = 0; $i < count($headerValues); $i++) {
+            // In order to accomplish a stable sort we need to take the original
+            // index into account as well during element comparison
+            $headerValues[$i] = [$headerValues[$i], $i];
+        }
+        usort( // Sort DESC but keep equal elements ASC
+            $headerValues,
+            function ($a, $b) {
+                $tagA = Str::trimSplit($a[0], ';', 2);
+                $tagB = Str::trimSplit($b[0], ';', 2);
+                $qValA = (float) (strpos($a[0], ';') > 0 ? substr(array_pop($tagA), 2) : 1);
+                $qValB = (float) (strpos($b[0], ';') > 0 ? substr(array_pop($tagB), 2) : 1);
+
+                return $qValA < $qValB ? 1 : ($qValA > $qValB ? -1 : ($a[1] > $b[1] ? 1 : ($a[1] < $b[1] ? -1 : 0)));
+            }
+        );
+        for ($i = 0; $i < count($headerValues); $i++) {
+            // We need to reset the array to its original structure once it's sorted
+            $headerValues[$i] = $headerValues[$i][0];
+        }
+        $requestedLocales = [];
+        foreach ($headerValues as $headerValue) {
+            if (strpos($headerValue, ';') > 0) {
+                $parts = Str::trimSplit($headerValue, ';', 2);
+                $headerValue = $parts[0];
+            }
+            $requestedLocales[] = str_replace('-', '_', $headerValue);
+        }
+        $requestedLocales = array_combine(
+            array_map('strtolower', array_values($requestedLocales)),
+            array_values($requestedLocales)
+        );
+
+        $available[] = $this->defaultLocale;
+        $availableLocales = array_combine(
+            array_map('strtolower', array_values($available)),
+            array_values($available)
+        );
+
+        $similarMatch = null;
+
+        foreach ($requestedLocales as $requestedLocaleLowered => $requestedLocale) {
+            $localeObj = $this->parseLocale($requestedLocaleLowered);
+
+            if (
+                isset($availableLocales[$requestedLocaleLowered])
+                && (! $similarMatch || $this->parseLocale($similarMatch)->language === $localeObj->language)
+            ) {
+                // Prefer perfect match only if no similar match has been found yet or the perfect match is more precise
+                // than the similar match
+                return $availableLocales[$requestedLocaleLowered];
+            }
+
+            if (! $similarMatch) {
+                foreach ($availableLocales as $availableLocaleLowered => $availableLocale) {
+                    if ($this->parseLocale($availableLocaleLowered)->language === $localeObj->language) {
+                        $similarMatch = $availableLocaleLowered;
+                        break;
+                    }
+                }
+            }
+        }
+
+        return $similarMatch ? $availableLocales[$similarMatch] : $this->defaultLocale;
+    }
+
+    /**
+     * Parse a locale into its subtags
+     *
+     * Converts to output of {@link \Locale::parseLocale()} to an object and returns it.
+     *
+     * @param string $locale
+     *
+     * @return stdClass Output of {@link \Locale::parseLocale()} converted to an object
+     */
+    public function parseLocale($locale)
+    {
+        return (object) \Locale::parseLocale($locale);
+    }
+}