[Form] Implemented CountryField

src/Symfony/Component/Form/CountryField.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace Symfony\Component\Form;
+
+/**
+ * A field for selecting from a list of countries
+ *
+ * @author Bernhard Schussek <bernhard.schussek@symfony-project.com>
+ */
+class CountryField extends ChoiceField
+{
+    /**
+     * Caches the country choices in different locales
+     * @var array
+     */
+    protected static $countries;
+
+    /**
+     * @inheritDoc
+     */
+    protected function configure()
+    {
+        $this->addOption('choices', self::getCountryChoices($this->locale));
+
+        parent::configure();
+    }
+
+    /**
+     * Returns the list of countries for a locale
+     *
+     * @param string $locale     The locale to use for the country names
+     * @throws RuntimeException  When the resource bundles cannot be loaded
+     */
+    protected static function getCountryChoices($locale)
+    {
+        if (!isset(self::$countries[$locale])) {
+            $bundle = new \ResourceBundle($locale, __DIR__.'/Resources/data/region');
+
+            if ($bundle === null) {
+                throw new RuntimeException('The region resource bundle could not be loaded');
+            }
+
+            $collator = new \Collator($locale);
+            $countries = array();
+
+            foreach ($bundle->get('Countries') as $code => $name) {
+                // Global regions (f.i. "America") have numeric codes
+                // Countries have alphabetic codes
+                // "ZZ" is the code for unknown region
+                if (ctype_alpha($code) && $code !== 'ZZ') {
+                    $countries[$code] = $name;
+                }
+            }
+
+            $collator->asort($countries);
+
+            self::$countries[$locale] = $countries;
+        }
+
+        return self::$countries[$locale];
+    }
+}

src/Symfony/Component/Form/Resources/data/UPDATE.txt

@@ -0,0 +1,34 @@
+How to update the ICU data
+==========================
+
+1. Checkout the current version of the ICU data files
+
+   $ svn co http://source.icu-project.org/repos/icu/icu/trunk/source/data icu-data
+
+2. Build the region resource bundles
+
+   $ cd icu-data/region
+   $ mkdir build
+   $ genrb -d build *.txt
+   
+3a. Replace the *.res files bundled with Symfony2 with the new ones.
+
+.dat-package
+------------
+
+The individual *.res files can be combined into a single .dat-file.
+Unfortunately, PHP's `ResourceBundle` class is currently not able to handle 
+.dat-files.
+
+Once it is, the following steps have to be followed to build the .dat-file:
+
+3b. Package the resource bundles into a single file
+
+   $ find . -name *.res | sed -e "s/\.\///g" > packagelist.txt
+   $ pkgdata -p region -T build -d . packagelist.txt
+
+4. Clean up
+
+   $ rm -rf build packagelist.txt
+
+5. You can now move region.dat to replace the version bundled with Symfony2.