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[Intl] Add FallbackTrait for data generation
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2 files changed

+102
-53
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2 files changed

+102
-53
lines changed

‎Data/Generator/FallbackTrait.php‎

Lines changed: 73 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,73 @@
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\Intl\Data\Generator;
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use Symfony\Component\Intl\Data\Bundle\Reader\BundleEntryReaderInterface;
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use Symfony\Component\Intl\Locale;
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/**
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* @author Roland Franssen <franssen.roland@gmail.com>
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*
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* @internal
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*/
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trait FallbackTrait
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{
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private $fallbackCache = [];
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private $generatingFallback = false;
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/**
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* @param string $tempDir
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* @param string $displayLocale
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*
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* @return array|null
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*
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* @see AbstractDataGenerator::generateDataForLocale()
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*/
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abstract protected function generateDataForLocale(BundleEntryReaderInterface $reader, $tempDir, $displayLocale);
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/**
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* @param string $tempDir
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*
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* @return array|null
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*
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* @see AbstractDataGenerator::generateDataForRoot()
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*/
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abstract protected function generateDataForRoot(BundleEntryReaderInterface $reader, $tempDir);
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/**
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* @param string $tempDir
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* @param string $displayLocale
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*
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* @return array
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*/
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private function generateFallbackData(BundleEntryReaderInterface $reader, $tempDir, $displayLocale)
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{
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if (null === $fallback = Locale::getFallback($displayLocale)) {
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return [];
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}
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if (isset($this->fallbackCache[$fallback])) {
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return $this->fallbackCache[$fallback];
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}
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$prevGeneratingFallback = $this->generatingFallback;
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$this->generatingFallback = true;
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try {
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$data = 'root' === $fallback ? $this->generateDataForRoot($reader, $tempDir) : $this->generateDataForLocale($reader, $tempDir, $fallback);
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} finally {
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$this->generatingFallback = $prevGeneratingFallback;
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}
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return $this->fallbackCache[$fallback] = $data ?: [];
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}
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}

‎Data/Generator/LocaleDataGenerator.php‎

Lines changed: 29 additions & 53 deletions
Original file line numberDiff line numberDiff line change
@@ -16,7 +16,6 @@
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use Symfony\Component\Intl\Data\Bundle\Reader\BundleEntryReaderInterface;
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use Symfony\Component\Intl\Data\Util\LocaleScanner;
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use Symfony\Component\Intl\Exception\MissingResourceException;
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use Symfony\Component\Intl\Locale;
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/**
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* The rule for compiling the locale bundle.
@@ -28,10 +27,10 @@
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*/
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class LocaleDataGenerator extends AbstractDataGenerator
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{
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private $locales;
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private $localeAliases;
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private $fallbackMapping;
34-
private $fallbackCache = [];
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use FallbackTrait;
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private $locales = [];
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private $localeAliases = [];
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/**
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* {@inheritdoc}
@@ -40,7 +39,6 @@ protected function scanLocales(LocaleScanner $scanner, $sourceDir)
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{
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$this->locales = $scanner->scanLocales($sourceDir.'/locales');
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$this->localeAliases = $scanner->scanAliases($sourceDir.'/locales');
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$this->fallbackMapping = $this->generateFallbackMapping(array_diff($this->locales, array_keys($this->localeAliases)), $this->localeAliases);
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return $this->locales;
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}
@@ -64,7 +62,6 @@ protected function compileTemporaryBundles(BundleCompilerInterface $compiler, $s
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*/
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protected function preGenerate()
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{
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$this->fallbackCache = [];
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}
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/**
@@ -73,7 +70,8 @@ protected function preGenerate()
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protected function generateDataForLocale(BundleEntryReaderInterface $reader, $tempDir, $displayLocale)
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{
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// Don't generate aliases, as they are resolved during runtime
76-
if (isset($this->localeAliases[$displayLocale])) {
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// Unless an alias is needed as fallback for de-duplication purposes
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if (isset($this->localeAliases[$displayLocale]) && !$this->generatingFallback) {
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return;
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}
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@@ -85,7 +83,7 @@ protected function generateDataForLocale(BundleEntryReaderInterface $reader, $te
8583
$localeNames = [];
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foreach ($this->locales as $locale) {
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// Ensure a normalized list of pure locales
88-
if (isset($this->localeAliases[$displayLocale]) || \Locale::getAllVariants($locale)) {
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if (\Locale::getAllVariants($locale)) {
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continue;
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}
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@@ -102,21 +100,27 @@ protected function generateDataForLocale(BundleEntryReaderInterface $reader, $te
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}
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}
104102

105-
// Process again to de-duplicate locales and their fallback locales
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// Only keep the differences
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$fallback = $displayLocale;
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while (isset($this->fallbackMapping[$fallback])) {
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if (!isset($this->fallbackCache[$fallback = $this->fallbackMapping[$fallback]])) {
110-
$this->fallbackCache[$fallback] = $this->generateDataForLocale($reader, $tempDir, $fallback) ?: [];
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}
112-
if (isset($this->fallbackCache[$fallback]['Names'])) {
113-
$localeNames = array_diff($localeNames, $this->fallbackCache[$fallback]['Names']);
114-
}
103+
$data = [
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'Names' => $localeNames,
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];
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// Don't de-duplicate a fallback locale
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// Ensures the display locale can be de-duplicated on itself
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if ($this->generatingFallback) {
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return $data;
115111
}
116112

117-
if ($localeNames) {
118-
return ['Names' => $localeNames];
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// Process again to de-duplicate locale and its fallback locales
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// Only keep the differences
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$fallbackData = $this->generateFallbackData($reader, $tempDir, $displayLocale);
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if (isset($fallbackData['Names'])) {
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$data['Names'] = array_diff($data['Names'], $fallbackData['Names']);
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}
119+
if (!$data['Names']) {
120+
return;
119121
}
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return $data;
120124
}
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122126
/**
@@ -131,12 +135,10 @@ protected function generateDataForRoot(BundleEntryReaderInterface $reader, $temp
131135
*/
132136
protected function generateDataForMeta(BundleEntryReaderInterface $reader, $tempDir)
133137
{
134-
if ($this->locales || $this->localeAliases) {
135-
return [
136-
'Locales' => $this->locales,
137-
'Aliases' => $this->localeAliases,
138-
];
139-
}
138+
return [
139+
'Locales' => $this->locales,
140+
'Aliases' => $this->localeAliases,
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];
140142
}
141143

142144
/**
@@ -175,30 +177,4 @@ private function generateLocaleName(BundleEntryReaderInterface $reader, $tempDir
175177

176178
return $name;
177179
}
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179-
private function generateFallbackMapping(array $displayLocales, array $aliases)
180-
{
181-
$displayLocales = array_flip($displayLocales);
182-
$mapping = [];
183-
184-
foreach ($displayLocales as $displayLocale => $_) {
185-
$mapping[$displayLocale] = null;
186-
$fallback = $displayLocale;
187-
188-
// Recursively search for a fallback locale until one is found
189-
while (null !== ($fallback = Locale::getFallback($fallback))) {
190-
// Currently, no locale has an alias as fallback locale.
191-
// If this starts to be the case, we need to add code here.
192-
\assert(!isset($aliases[$fallback]));
193-
194-
// Check whether the fallback exists
195-
if (isset($displayLocales[$fallback])) {
196-
$mapping[$displayLocale] = $fallback;
197-
break;
198-
}
199-
}
200-
}
201-
202-
return $mapping;
203-
}
204180
}

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