drupal/includes/locale.inc

876 lines
29 KiB
PHP

<?php
/**
* @file
* Administration functions for locale.module.
*/
/**
* The language is determined using a URL language indicator:
* path prefix or domain according to the configuration.
*/
define('LOCALE_LANGUAGE_NEGOTIATION_URL', 'locale-url');
/**
* The language is set based on the browser language settings.
*/
define('LOCALE_LANGUAGE_NEGOTIATION_BROWSER', 'locale-browser');
/**
* The language is determined using the current interface language.
*/
define('LOCALE_LANGUAGE_NEGOTIATION_INTERFACE', 'locale-interface');
/**
* If no URL language is available language is determined using an already
* detected one.
*/
define('LOCALE_LANGUAGE_NEGOTIATION_URL_FALLBACK', 'locale-url-fallback');
/**
* The language is set based on the user language settings.
*/
define('LOCALE_LANGUAGE_NEGOTIATION_USER', 'locale-user');
/**
* The language is set based on the request/session parameters.
*/
define('LOCALE_LANGUAGE_NEGOTIATION_SESSION', 'locale-session');
/**
* Regular expression pattern used to localize JavaScript strings.
*/
define('LOCALE_JS_STRING', '(?:(?:\'(?:\\\\\'|[^\'])*\'|"(?:\\\\"|[^"])*")(?:\s*\+\s*)?)+');
/**
* Translation import mode overwriting all existing translations
* if new translated version available.
*/
define('LOCALE_IMPORT_OVERWRITE', 0);
/**
* Translation import mode keeping existing translations and only
* inserting new strings.
*/
define('LOCALE_IMPORT_KEEP', 1);
/**
* URL language negotiation: use the path prefix as URL language
* indicator.
*/
define('LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX', 0);
/**
* URL language negotiation: use the domain as URL language
* indicator.
*/
define('LOCALE_LANGUAGE_NEGOTIATION_URL_DOMAIN', 1);
/**
* @defgroup locale-languages-negotiation Language negotiation options
* @{
* Functions for language negotiation.
*
* There are functions that provide the ability to identify the
* language. This behavior can be controlled by various options.
*/
/**
* Identifies the language from the current interface language.
*
* @return
* The current interface language code.
*/
function locale_language_from_interface() {
global $language;
return isset($language->language) ? $language->language : FALSE;
}
/**
* Identify language from the Accept-language HTTP header we got.
*
* We perform browser accept-language parsing only if page cache is disabled,
* otherwise we would cache a user-specific preference.
*
* @param $languages
* An array of valid language objects.
*
* @return
* A valid language code on success, FALSE otherwise.
*/
function locale_language_from_browser($languages) {
// Specified by the user via the browser's Accept Language setting
// Samples: "hu, en-us;q=0.66, en;q=0.33", "hu,en-us;q=0.5"
$browser_langs = array();
if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
$browser_accept = explode(",", $_SERVER['HTTP_ACCEPT_LANGUAGE']);
foreach ($browser_accept as $langpart) {
// The language part is either a code or a code with a quality.
// We cannot do anything with a * code, so it is skipped.
// If the quality is missing, it is assumed to be 1 according to the RFC.
if (preg_match("!([a-z-]+)(;q=([0-9\\.]+))?!", trim($langpart), $found)) {
$browser_langs[$found[1]] = (isset($found[3]) ? (float) $found[3] : 1.0);
}
}
}
// Order the codes by quality
arsort($browser_langs);
// Try to find the first preferred language we have
foreach ($browser_langs as $langcode => $q) {
if (isset($languages[$langcode])) {
return $langcode;
}
}
return FALSE;
}
/**
* Identify language from the user preferences.
*
* @param $languages
* An array of valid language objects.
*
* @return
* A valid language code on success, FALSE otherwise.
*/
function locale_language_from_user($languages) {
// User preference (only for logged users).
global $user;
if ($user->uid) {
return $user->language;
}
// No language preference from the user.
return FALSE;
}
/**
* Identify language from a request/session parameter.
*
* @param $languages
* An array of valid language objects.
*
* @return
* A valid language code on success, FALSE otherwise.
*/
function locale_language_from_session($languages) {
$param = variable_get('locale_language_negotiation_session_param', 'language');
// Request parameter: we need to update the session parameter only if we have
// an authenticated user.
if (isset($_GET[$param]) && isset($languages[$langcode = $_GET[$param]])) {
global $user;
if ($user->uid) {
$_SESSION[$param] = $langcode;
}
return $langcode;
}
// Session parameter.
if (isset($_SESSION[$param])) {
return $_SESSION[$param];
}
return FALSE;
}
/**
* Identify language via URL prefix or domain.
*
* @param $languages
* An array of valid language objects.
*
* @return
* A valid language code on success, FALSE otherwise.
*/
function locale_language_from_url($languages) {
$language_url = FALSE;
if (!language_negotiation_get_any(LOCALE_LANGUAGE_NEGOTIATION_URL)) {
return $language_url;
}
switch (variable_get('locale_language_negotiation_url_part', LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX)) {
case LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX:
// $_GET['q'] might not be available at this time, because
// path initialization runs after the language bootstrap phase.
list($language, $_GET['q']) = language_url_split_prefix(isset($_GET['q']) ? $_GET['q'] : NULL, $languages);
if ($language !== FALSE) {
$language_url = $language->language;
}
break;
case LOCALE_LANGUAGE_NEGOTIATION_URL_DOMAIN:
foreach ($languages as $language) {
// Skip check if the language doesn't have a domain.
if ($language->domain) {
// Only compare the domains not the protocols or ports.
// Remove protocol and add http:// so parse_url works
$host = 'http://' . str_replace(array('http://', 'https://'), '', $language->domain);
$host = parse_url($host, PHP_URL_HOST);
if ($_SERVER['HTTP_HOST'] == $host) {
$language_url = $language->language;
break;
}
}
}
break;
}
return $language_url;
}
/**
* Determines the language to be assigned to URLs when none is detected.
*
* The language negotiation process has a fallback chain that ends with the
* default language provider. Each built-in language type has a separate
* initialization:
* - Interface language, which is the only configurable one, always gets a valid
* value. If no request-specific language is detected, the default language
* will be used.
* - Content language merely inherits the interface language by default.
* - URL language is detected from the requested URL and will be used to rewrite
* URLs appearing in the page being rendered. If no language can be detected,
* there are two possibilities:
* - If the default language has no configured path prefix or domain, then the
* default language is used. This guarantees that (missing) URL prefixes are
* preserved when navigating through the site.
* - If the default language has a configured path prefix or domain, a
* requested URL having an empty prefix or domain is an anomaly that must be
* fixed. This is done by introducing a prefix or domain in the rendered
* page matching the detected interface language.
*
* @param $languages
* (optional) An array of valid language objects. This is passed by
* language_provider_invoke() to every language provider callback, but it is
* not actually needed here. Defaults to NULL.
* @param $language_type
* (optional) The language type to fall back to. Defaults to the interface
* language.
*
* @return
* A valid language code.
*/
function locale_language_url_fallback($language = NULL, $language_type = LANGUAGE_TYPE_INTERFACE) {
$default = language_default();
$prefix = (variable_get('locale_language_negotiation_url_part', LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX) == LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX);
// If the default language is not configured to convey language information,
// a missing URL language information indicates that URL language should be
// the default one, otherwise we fall back to an already detected language.
if (($prefix && empty($default->prefix)) || (!$prefix && empty($default->domain))) {
return $default->language;
}
else {
return $GLOBALS[$language_type]->language;
}
}
/**
* Return the URL language switcher block. Translation links may be provided by
* other modules.
*/
function locale_language_switcher_url($type, $path) {
$languages = language_list('enabled');
$links = array();
foreach ($languages[1] as $language) {
$links[$language->language] = array(
'href' => $path,
'title' => $language->native,
'language' => $language,
'attributes' => array('class' => array('language-link')),
);
}
return $links;
}
/**
* Return the session language switcher block.
*/
function locale_language_switcher_session($type, $path) {
drupal_add_css(drupal_get_path('module', 'locale') . '/locale.css');
$param = variable_get('locale_language_negotiation_session_param', 'language');
$language_query = isset($_SESSION[$param]) ? $_SESSION[$param] : $GLOBALS[$type]->language;
$languages = language_list('enabled');
$links = array();
$query = $_GET;
unset($query['q']);
foreach ($languages[1] as $language) {
$langcode = $language->language;
$links[$langcode] = array(
'href' => $path,
'title' => $language->native,
'attributes' => array('class' => array('language-link')),
'query' => $query,
);
if ($language_query != $langcode) {
$links[$langcode]['query'][$param] = $langcode;
}
else {
$links[$langcode]['attributes']['class'][] = ' session-active';
}
}
return $links;
}
/**
* Rewrite URLs for the URL language provider.
*/
function locale_language_url_rewrite_url(&$path, &$options) {
static $drupal_static_fast;
if (!isset($drupal_static_fast)) {
$drupal_static_fast['languages'] = &drupal_static(__FUNCTION__);
}
$languages = &$drupal_static_fast['languages'];
if (!isset($languages)) {
$languages = language_list('enabled');
$languages = array_flip(array_keys($languages[1]));
}
// Language can be passed as an option, or we go for current URL language.
if (!isset($options['language'])) {
global $language_url;
$options['language'] = $language_url;
}
// We allow only enabled languages here.
elseif (!isset($languages[$options['language']->language])) {
unset($options['language']);
return;
}
if (isset($options['language'])) {
switch (variable_get('locale_language_negotiation_url_part', LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX)) {
case LOCALE_LANGUAGE_NEGOTIATION_URL_DOMAIN:
if ($options['language']->domain) {
// Ask for an absolute URL with our modified base_url.
$options['absolute'] = TRUE;
$options['base_url'] = $options['language']->domain;
}
break;
case LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX:
if (!empty($options['language']->prefix)) {
$options['prefix'] = $options['language']->prefix . '/';
}
break;
}
}
}
/**
* Rewrite URLs for the Session language provider.
*/
function locale_language_url_rewrite_session(&$path, &$options) {
static $query_rewrite, $query_param, $query_value;
// The following values are not supposed to change during a single page
// request processing.
if (!isset($query_rewrite)) {
global $user;
if (!$user->uid) {
$languages = language_list('enabled');
$languages = $languages[1];
$query_param = check_plain(variable_get('locale_language_negotiation_session_param', 'language'));
$query_value = isset($_GET[$query_param]) ? check_plain($_GET[$query_param]) : NULL;
$query_rewrite = isset($languages[$query_value]) && language_negotiation_get_any(LOCALE_LANGUAGE_NEGOTIATION_SESSION);
}
else {
$query_rewrite = FALSE;
}
}
// If the user is anonymous, the user language provider is enabled, and the
// corresponding option has been set, we must preserve any explicit user
// language preference even with cookies disabled.
if ($query_rewrite) {
if (is_string($options['query'])) {
$options['query'] = drupal_get_query_array($options['query']);
}
if (!isset($options['query'][$query_param])) {
$options['query'][$query_param] = $query_value;
}
}
}
/**
* @} End of "locale-languages-negotiation"
*/
/**
* Check that a string is safe to be added or imported as a translation.
*
* This test can be used to detect possibly bad translation strings. It should
* not have any false positives. But it is only a test, not a transformation,
* as it destroys valid HTML. We cannot reliably filter translation strings
* on import because some strings are irreversibly corrupted. For example,
* a &amp; in the translation would get encoded to &amp;amp; by filter_xss()
* before being put in the database, and thus would be displayed incorrectly.
*
* The allowed tag list is like filter_xss_admin(), but omitting div and img as
* not needed for translation and likely to cause layout issues (div) or a
* possible attack vector (img).
*/
function locale_string_is_safe($string) {
return decode_entities($string) == decode_entities(filter_xss($string, array('a', 'abbr', 'acronym', 'address', 'b', 'bdo', 'big', 'blockquote', 'br', 'caption', 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'dl', 'dt', 'em', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'ins', 'kbd', 'li', 'ol', 'p', 'pre', 'q', 'samp', 'small', 'span', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'ul', 'var')));
}
/**
* @defgroup locale-api-add Language addition API
* @{
* Add a language.
*
* The language addition API is used to create languages and store them.
*/
/**
* API function to add a language.
*
* @param $langcode
* Language code.
* @param $name
* English name of the language
* @param $native
* Native name of the language
* @param $direction
* LANGUAGE_LTR or LANGUAGE_RTL
* @param $domain
* Optional custom domain name with protocol, without
* trailing slash (eg. http://de.example.com).
* @param $prefix
* Optional path prefix for the language. Defaults to the
* language code if omitted.
* @param $enabled
* Optionally TRUE to enable the language when created or FALSE to disable.
* @param $default
* Optionally set this language to be the default.
*/
function locale_add_language($langcode, $name = NULL, $native = NULL, $direction = LANGUAGE_LTR, $domain = '', $prefix = '', $enabled = TRUE, $default = FALSE) {
// Default prefix on language code.
if (empty($prefix)) {
$prefix = $langcode;
}
// If name was not set, we add a predefined language.
if (!isset($name)) {
include_once DRUPAL_ROOT . '/includes/standard.inc';
$predefined = standard_language_list();
$name = $predefined[$langcode][0];
$native = isset($predefined[$langcode][1]) ? $predefined[$langcode][1] : $predefined[$langcode][0];
$direction = isset($predefined[$langcode][2]) ? $predefined[$langcode][2] : LANGUAGE_LTR;
}
db_insert('languages')
->fields(array(
'language' => $langcode,
'name' => $name,
'native' => $native,
'direction' => $direction,
'domain' => $domain,
'prefix' => $prefix,
'enabled' => $enabled,
))
->execute();
// Only set it as default if enabled.
if ($enabled && $default) {
variable_set('language_default', (object) array('language' => $langcode, 'name' => $name, 'native' => $native, 'direction' => $direction, 'enabled' => (int) $enabled, 'plurals' => 0, 'formula' => '', 'domain' => '', 'prefix' => $prefix, 'weight' => 0, 'javascript' => ''));
}
if ($enabled) {
// Increment enabled language count if we are adding an enabled language.
variable_set('language_count', variable_get('language_count', 1) + 1);
}
// Kill the static cache in language_list().
drupal_static_reset('language_list');
// Force JavaScript translation file creation for the newly added language.
_locale_invalidate_js($langcode);
watchdog('locale', 'The %language language (%code) has been created.', array('%language' => $name, '%code' => $langcode));
module_invoke_all('multilingual_settings_changed');
}
/**
* @} End of "locale-api-add"
*/
/**
* Parses a JavaScript file, extracts strings wrapped in Drupal.t() and
* Drupal.formatPlural() and inserts them into the database.
*/
function _locale_parse_js_file($filepath) {
global $language;
// The file path might contain a query string, so make sure we only use the
// actual file.
$parsed_url = drupal_parse_url($filepath);
$filepath = $parsed_url['path'];
// Load the JavaScript file.
$file = file_get_contents($filepath);
// Match all calls to Drupal.t() in an array.
// Note: \s also matches newlines with the 's' modifier.
preg_match_all('~[^\w]Drupal\s*\.\s*t\s*\(\s*(' . LOCALE_JS_STRING . ')\s*[,\)]~s', $file, $t_matches);
// Match all Drupal.formatPlural() calls in another array.
preg_match_all('~[^\w]Drupal\s*\.\s*formatPlural\s*\(\s*.+?\s*,\s*(' . LOCALE_JS_STRING . ')\s*,\s*((?:(?:\'(?:\\\\\'|[^\'])*@count(?:\\\\\'|[^\'])*\'|"(?:\\\\"|[^"])*@count(?:\\\\"|[^"])*")(?:\s*\+\s*)?)+)\s*[,\)]~s', $file, $plural_matches);
// Loop through all matches and process them.
$all_matches = array_merge($plural_matches[1], $t_matches[1]);
foreach ($all_matches as $key => $string) {
$strings = array($string);
// If there is also a plural version of this string, add it to the strings array.
if (isset($plural_matches[2][$key])) {
$strings[] = $plural_matches[2][$key];
}
foreach ($strings as $key => $string) {
// Remove the quotes and string concatenations from the string.
$string = implode('', preg_split('~(?<!\\\\)[\'"]\s*\+\s*[\'"]~s', substr($string, 1, -1)));
$source = db_query("SELECT lid, location FROM {locales_source} WHERE source = :source", array(':source' => $string))->fetchObject();
if ($source) {
// We already have this source string and now have to add the location
// to the location column, if this file is not yet present in there.
$locations = preg_split('~\s*;\s*~', $source->location);
if (!in_array($filepath, $locations)) {
$locations[] = $filepath;
$locations = implode('; ', $locations);
// Save the new locations string to the database.
db_update('locales_source')
->fields(array(
'location' => $locations,
))
->condition('lid', $source->lid)
->execute();
}
}
else {
// We don't have the source string yet, thus we insert it into the database.
db_insert('locales_source')
->fields(array(
'location' => $filepath,
'source' => $string,
'context' => '',
))
->execute();
}
}
}
}
/**
* Force the JavaScript translation file(s) to be refreshed.
*
* This function sets a refresh flag for a specified language, or all
* languages except English, if none specified. JavaScript translation
* files are rebuilt (with locale_update_js_files()) the next time a
* request is served in that language.
*
* @param $langcode
* The language code for which the file needs to be refreshed.
*
* @return
* New content of the 'javascript_parsed' variable.
*/
function _locale_invalidate_js($langcode = NULL) {
$parsed = variable_get('javascript_parsed', array());
if (empty($langcode)) {
// Invalidate all languages.
$languages = language_list();
unset($languages['en']);
foreach ($languages as $lcode => $data) {
$parsed['refresh:' . $lcode] = 'waiting';
}
}
else {
// Invalidate single language.
$parsed['refresh:' . $langcode] = 'waiting';
}
variable_set('javascript_parsed', $parsed);
return $parsed;
}
/**
* (Re-)Creates the JavaScript translation file for a language.
*
* @param $language
* The language, the translation file should be (re)created for.
*/
function _locale_rebuild_js($langcode = NULL) {
if (!isset($langcode)) {
global $language;
}
else {
// Get information about the locale.
$languages = language_list();
$language = $languages[$langcode];
}
// Construct the array for JavaScript translations.
// Only add strings with a translation to the translations array.
$result = db_query("SELECT s.lid, s.source, t.translation FROM {locales_source} s INNER JOIN {locales_target} t ON s.lid = t.lid AND t.language = :language WHERE s.location LIKE '%.js%'", array(':language' => $language->language));
$translations = array();
foreach ($result as $data) {
$translations[$data->source] = $data->translation;
}
// Construct the JavaScript file, if there are translations.
$data_hash = NULL;
$data = $status = '';
if (!empty($translations)) {
$data = "Drupal.locale = { ";
if (!empty($language->formula)) {
$data .= "'pluralFormula': function (\$n) { return Number({$language->formula}); }, ";
}
$data .= "'strings': " . drupal_json_encode($translations) . " };";
$data_hash = drupal_hash_base64($data);
}
// Construct the filepath where JS translation files are stored.
// There is (on purpose) no front end to edit that variable.
$dir = 'public://' . variable_get('locale_js_directory', 'languages');
// Delete old file, if we have no translations anymore, or a different file to be saved.
$changed_hash = $language->javascript != $data_hash;
if (!empty($language->javascript) && (!$data || $changed_hash)) {
file_unmanaged_delete($dir . '/' . $language->language . '_' . $language->javascript . '.js');
$language->javascript = '';
$status = 'deleted';
}
// Only create a new file if the content has changed or the original file got
// lost.
$dest = $dir . '/' . $language->language . '_' . $data_hash . '.js';
if ($data && ($changed_hash || !file_exists($dest))) {
// Ensure that the directory exists and is writable, if possible.
file_prepare_directory($dir, FILE_CREATE_DIRECTORY);
// Save the file.
if (file_unmanaged_save_data($data, $dest)) {
$language->javascript = $data_hash;
// If we deleted a previous version of the file and we replace it with a
// new one we have an update.
if ($status == 'deleted') {
$status = 'updated';
}
// If the file did not exist previously and the data has changed we have
// a fresh creation.
elseif ($changed_hash) {
$status = 'created';
}
// If the data hash is unchanged the translation was lost and has to be
// rebuilt.
else {
$status = 'rebuilt';
}
}
else {
$language->javascript = '';
$status = 'error';
}
}
// Save the new JavaScript hash (or an empty value if the file just got
// deleted). Act only if some operation was executed that changed the hash
// code.
if ($status && $changed_hash) {
db_update('languages')
->fields(array(
'javascript' => $language->javascript,
))
->condition('language', $language->language)
->execute();
// Update the default language variable if the default language has been altered.
// This is necessary to keep the variable consistent with the database
// version of the language and to prevent checking against an outdated hash.
$default_langcode = language_default()->language;
if ($default_langcode == $language->language) {
$default = db_query("SELECT * FROM {languages} WHERE language = :language", array(':language' => $default_langcode))->fetchObject();
variable_set('language_default', $default);
}
}
// Log the operation and return success flag.
switch ($status) {
case 'updated':
watchdog('locale', 'Updated JavaScript translation file for the language %language.', array('%language' => t($language->name)));
return TRUE;
case 'rebuilt':
watchdog('locale', 'JavaScript translation file %file.js was lost.', array('%file' => $language->javascript), WATCHDOG_WARNING);
// Proceed to the 'created' case as the JavaScript translation file has
// been created again.
case 'created':
watchdog('locale', 'Created JavaScript translation file for the language %language.', array('%language' => t($language->name)));
return TRUE;
case 'deleted':
watchdog('locale', 'Removed JavaScript translation file for the language %language, because no translations currently exist for that language.', array('%language' => t($language->name)));
return TRUE;
case 'error':
watchdog('locale', 'An error occurred during creation of the JavaScript translation file for the language %language.', array('%language' => t($language->name)), WATCHDOG_ERROR);
return FALSE;
default:
// No operation needed.
return TRUE;
}
}
/**
* @defgroup locale-api-predefined List of predefined languages
* @{
* API to provide a list of predefined languages.
*/
/**
* Prepares the language code list for a select form item with only the unsupported ones
*/
function _locale_prepare_predefined_list() {
include_once DRUPAL_ROOT . '/includes/standard.inc';
$languages = language_list();
$predefined = standard_language_list();
foreach ($predefined as $key => $value) {
if (isset($languages[$key])) {
unset($predefined[$key]);
continue;
}
// Include native name in output, if possible
if (count($value) > 1) {
$tname = t($value[0]);
$predefined[$key] = ($tname == $value[1]) ? $tname : "$tname ($value[1])";
}
else {
$predefined[$key] = t($value[0]);
}
}
asort($predefined);
return $predefined;
}
/**
* @} End of "locale-api-languages-predefined"
*/
/**
* Get list of all predefined and custom countries.
*
* @return
* An array of all country code => country name pairs.
*/
function country_get_list() {
include_once DRUPAL_ROOT . '/includes/standard.inc';
$countries = standard_country_list();
// Allow other modules to modify the country list.
drupal_alter('countries', $countries);
return $countries;
}
/**
* Save locale specific date formats to the database.
*
* @param $langcode
* Language code, can be 2 characters, e.g. 'en' or 5 characters, e.g.
* 'en-CA'.
* @param $type
* Date format type, e.g. 'short', 'medium'.
* @param $format
* The date format string.
*/
function locale_date_format_save($langcode, $type, $format) {
$locale_format = array();
$locale_format['language'] = $langcode;
$locale_format['type'] = $type;
$locale_format['format'] = $format;
$is_existing = (bool) db_query_range('SELECT 1 FROM {date_format_locale} WHERE language = :langcode AND type = :type', 0, 1, array(':langcode' => $langcode, ':type' => $type))->fetchField();
if ($is_existing) {
$keys = array('type', 'language');
drupal_write_record('date_format_locale', $locale_format, $keys);
}
else {
drupal_write_record('date_format_locale', $locale_format);
}
}
/**
* Select locale date format details from database.
*
* @param $languages
* An array of language codes.
*
* @return
* An array of date formats.
*/
function locale_get_localized_date_format($languages) {
$formats = array();
// Get list of different format types.
$format_types = system_get_date_types();
$short_default = variable_get('date_format_short', 'm/d/Y - H:i');
// Loop through each language until we find one with some date formats
// configured.
foreach ($languages as $language) {
$date_formats = system_date_format_locale($language);
if (!empty($date_formats)) {
// We have locale-specific date formats, so check for their types. If
// we're missing a type, use the default setting instead.
foreach ($format_types as $type => $type_info) {
// If format exists for this language, use it.
if (!empty($date_formats[$type])) {
$formats['date_format_' . $type] = $date_formats[$type];
}
// Otherwise get default variable setting. If this is not set, default
// to the short format.
else {
$formats['date_format_' . $type] = variable_get('date_format_' . $type, $short_default);
}
}
// Return on the first match.
return $formats;
}
}
// No locale specific formats found, so use defaults.
$system_types = array('short', 'medium', 'long');
// Handle system types separately as they have defaults if no variable exists.
$formats['date_format_short'] = $short_default;
$formats['date_format_medium'] = variable_get('date_format_medium', 'D, m/d/Y - H:i');
$formats['date_format_long'] = variable_get('date_format_long', 'l, F j, Y - H:i');
// For non-system types, get the default setting, otherwise use the short
// format.
foreach ($format_types as $type => $type_info) {
if (!in_array($type, $system_types)) {
$formats['date_format_' . $type] = variable_get('date_format_' . $type, $short_default);
}
}
return $formats;
}