type;
// Caveat: if load_%_textdomain is called later on with a custom (author) path, it will be ignored.
break;
}
}
}
return $path;
}
/**
* Triggers a new round of load_translation_file attempts.
*/
public function on_load_textdomain( $domain, $mofile ){
if( isset($this->lock[$domain]) ){
// may be recursion for our custom file
if( $this->lock[$domain] === $mofile ){
return;
}
// else a new file, so release the lock
unset($this->lock[$domain]);
}
// flag whether the original MO file (or a valid sibling) exists for this load.
// we could check this during filter_load_translation_file but this saves doing it multiple times
$this->mofile = self::try_readable($mofile);
// Setting the domain just in case someone is applying filters manually in a strange order
$this->domain = $domain;
// If load_textdomain was called directly with a custom file we'll have missed it
if( 'default' !== $domain ){
$path = dirname($mofile).'/';
if( ! array_key_exists($path,$this->custom) ){
$this->resolveType($path);
}
}
$this->seen[$domain] = true;
}
/**
* Filter callback for `load_translation_file`
* Called from {@see load_textdomain} multiple times for each file format in preference order.
*/
public function filter_load_translation_file( $file, $domain, $locale ){
// domain mismatch would be unexpected during normal execution, but anyone could apply filters.
if( $domain !== $this->domain ){
return $file;
}
// skip recursion for our own custom file:
if( isset($this->lock[$domain]) ){
return $file;
}
// loading a custom file directly is fine, although above lock will prevent in normal situations
$path = dirname($file).'/';
$custom = trailingslashit( loco_constant('LOCO_LANG_DIR') );
if( $path === $custom || str_starts_with($file,$custom) ){
return $file;
}
// map system file to custom location if possible. e.g. languages/foo => languages/loco/foo
// this will account for most installed translations which have been customized.
$system = trailingslashit( loco_constant('WP_LANG_DIR') );
if( str_starts_with($file,$system) ){
$mapped = substr_replace($file,$custom,0,strlen($system) );
}
// custom path may be author location, meaning it's under plugin or theme directories
else if( array_key_exists($path,$this->custom) ){
$ext = explode( '.', basename($file), 2 )[1];
$mapped = $custom.$this->custom[$path].'/'.$domain.'-'.$locale.'.'.$ext;
}
// otherwise we'll assume the custom path is not intended to be further customized.
else {
return $file;
}
// When the original file isn't found, calls to load_textdomain will return false and overwrite our custom file.
// Here we'll simply return our mapped version, whether it exists or not. WordPress will treat is as the original.
if( '' === $this->mofile ){
return $mapped;
}
// We know that the original file will eventually be found (even if via a second file attempt)
// This requires a recursive call to load_textdomain for our custom file, WordPress will handle if it exists.
$mapped = self::to_mopath($mapped);
$this->lock[$domain] = $mapped;
load_textdomain( $domain, $mapped, $locale );
/*/ Sanity check that original file does exist, and it's the one we're expecting:
if( '' === self::try_readable($file) || self::to_mopath($file) !== $this->mofile ){
throw new LogicException;
}*/
// Return original file, which we've established does exist, or if it doesn't another extension might
return $file;
}
/**
* Resolve a custom directory path to either a theme or a plugin
* @param string $path directory path with trailing slash
*/
private function resolveType( string $path ):void {
// no point trying to resolve a relative path, this likely stems from bad call to load_textdomain
if( ! Loco_fs_File::is_abs($path) ){
return;
}
// custom location is likely to be inside a theme or plugin, but could be anywhere
if( Loco_fs_Locations::getPlugins()->check($path) ){
$this->custom[$path] = 'plugins';
}
else if( Loco_fs_Locations::getThemes()->check($path) ){
$this->custom[$path] = 'themes';
}
// folder could be plugin-specific, e.g. languages/woocommerce,
// but this won't be merged with custom because it IS custom.
}
/**
* Fix any file extension to use .mo
*/
private static function to_mopath( string $path ):string {
if( str_ends_with($path,'.mo') ){
return $path;
}
// path should only be a .l10n.php file, but could be something custom
return dirname($path).'/'.explode('.', basename($path),2)[0].'.mo';
}
/**
* Check .mo or .php file is readable, and return the .mo file if so.
* Note that load_textdomain expects a .mo file, even if it ends up using .l10n.php
*/
private static function try_readable( string $path ):string {
$mofile = self::to_mopath($path);
if( is_readable($mofile) || is_readable(substr($path,0,-2).'l10n.php') ){
return $mofile;
}
return '';
}
// JSON //
/**
* `load_script_translation_file` filter callback
* Alternative method to merging in `pre_load_script_translations`
* @param string $path candidate JSON file (false on final attempt)
* @param string $handle
*/
public function filter_load_script_translation_file( $path = '', $handle = '' ) {
// currently handle-based JSONs for author-provided translations will never map.
if( is_string($path) && preg_match('/^-[a-f0-9]{32}\\.json$/',substr($path,-38) ) ){
$system = loco_constant('WP_LANG_DIR').'/';
$custom = loco_constant('LOCO_LANG_DIR').'/';
if( str_starts_with($path,$system) ){
$mapped = substr_replace($path,$custom,0,strlen($system) );
// Defer merge until either JSON is resolved or final attempt passes an empty path.
if( is_readable($mapped) ){
$this->json[$handle] = $mapped;
}
}
}
// If we return an unreadable file, load_script_translations will not fire.
// However, we need to allow WordPress to try all files. Last attempt will have empty path
else if( false === $path && array_key_exists($handle,$this->json) ){
$path = $this->json[$handle];
unset( $this->json[$handle] );
}
return $path;
}
/**
* `load_script_translations` filter callback.
* Merges custom translations on top of installed ones, as late as possible.
*
* @param string $json contents of JSON file that WordPress has read
* @param string $path path relating to given JSON (not used here)
* @param string $handle script handle for registered merge
* @return string final JSON translations
*/
public function filter_load_script_translations( $json = '', $path = '', $handle = '' ) {
if( array_key_exists($handle,$this->json) ){
$path = $this->json[$handle];
unset( $this->json[$handle] );
if( is_string($json) && '' !== $json ){
$json = self::mergeJson( $json, file_get_contents($path) );
}
else {
$json = file_get_contents($path);
}
}
return $json;
}
/**
* Merge two JSON translation files such that custom strings override
* @param string $json Original/fallback JSON
* @param string $custom Custom JSON (must exclude empty keys)
* @return string Merged JSON
*/
private static function mergeJson( string $json, string $custom ):string {
$fallbackJed = json_decode($json,true);
$overrideJed = json_decode($custom,true);
if( self::jedValid($fallbackJed) && self::jedValid($overrideJed) ){
// Original key is probably "messages" instead of domain, but this could change at any time.
// Although custom file should have domain key, there's no guarantee JSON wasn't overwritten or key changed.
$overrideMessages = current($overrideJed['locale_data']);
$fallbackMessages = current($fallbackJed['locale_data']);
// We could merge headers, but custom file should be correct
// $overrideMessages[''] += $fallbackMessages[''];
// Continuing to use "messages" here as per WordPress. Good backward compatibility is likely.
// Note that our custom JED is sparse (exported with empty keys absent). This is essential for + operator.
$overrideJed['locale_data'] = [
'messages' => $overrideMessages + $fallbackMessages,
];
// Note that envelope will be the custom one. No functional difference but demonstrates that merge worked.
$overrideJed['merged'] = true;
$json = json_encode($overrideJed);
}
// Handle situations where one or neither JSON strings are valid
else if( self::jedValid($overrideJed) ){
$json = $custom;
}
else if( ! self::jedValid($fallbackJed) ){
$json = '';
}
return $json;
}
/**
* Test if unserialized JSON is a valid JED structure
* @param mixed $jed
*/
private static function jedValid( $jed ):bool {
return is_array($jed) && array_key_exists('locale_data',$jed) && is_array($jed['locale_data']) && $jed['locale_data'];
}
// Debug //
/**
* Alert to the early JIT loading issue for any text domain queried before we've seen it be loaded.
*/
private function handle_unseen_textdomain( $domain ){
if( ! array_key_exists($domain,$this->seen) ){
$this->seen[$domain] = true;
do_action('loco_unseen_textdomain',$domain);
}
}
/**
* `gettext` filter callback. Enabled only in Debug mode.
*/
public function debug_gettext( $translation = '', $text = '', $domain = '' ){
$this->handle_unseen_textdomain($domain?:'default');
return $translation;
}
/**
* `ngettext` filter callback. Enabled only in Debug mode.
*/
public function debug_ngettext( $translation = '', $single = '', $plural = '', $number = 0, $domain = '' ){
$this->handle_unseen_textdomain($domain?:'default');
return $translation;
}
/**
* `gettext_with_context` filter callback. Enabled only in Debug mode.
*/
public function debug_gettext_with_context( $translation = '', $text = '', $context = '', $domain = '' ){
$this->handle_unseen_textdomain($domain?:'default');
return $translation;
}
/**
* `ngettext_with_context` filter callback. Enabled only in Debug mode.
*/
public function debug_ngettext_with_context( $translation = '', $single = '', $plural = '', $number = 0, $context = '', $domain = '' ){
$this->handle_unseen_textdomain($domain?:'default');
return $translation;
}
}
Portfolio Demo 2 - online magazín Pekný deň
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