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<?php

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/**

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* Retrieves an associative array of languages to which

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* this plugin is translated.

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* @return array Array of languages.

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function wpcf7_l10n() {

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static $l10n = array();

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if ( ! empty( $l10n ) ) {

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return $l10n;

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}

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if ( ! is_admin() ) {

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return $l10n;

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}

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require_once( ABSPATH . 'wp-admin/includes/translation-install.php' );

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$api = translations_api( 'plugins', array(

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'slug' => 'contact-form-7',

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'version' => WPCF7_VERSION,

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) );

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if ( is_wp_error( $api )

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or empty( $api['translations'] ) ) {

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return $l10n;

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}

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foreach ( (array) $api['translations'] as $translation ) {

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if ( ! empty( $translation['language'] )

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and ! empty( $translation['english_name'] ) ) {

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$l10n[$translation['language']] = $translation['english_name'];

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}

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}

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return $l10n;

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}

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/**

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* Returns true if the given locale code looks valid.

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* @param string $locale Locale code.

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function wpcf7_is_valid_locale( $locale ) {

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if ( ! is_string( $locale ) ) {

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return false;

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}

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$pattern = '/^[a-z]{2,3}(?:_[a-zA-Z_]{2,})?$/';

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return (bool) preg_match( $pattern, $locale );

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}

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/**

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* Returns true if the given locale is an RTL language.

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function wpcf7_is_rtl( $locale = '' ) {

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static $rtl_locales = array(

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'ar' => 'Arabic',

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'ary' => 'Moroccan Arabic',

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'azb' => 'South Azerbaijani',

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'fa_IR' => 'Persian',

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'haz' => 'Hazaragi',

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'he_IL' => 'Hebrew',

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'ps' => 'Pashto',

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'ug_CN' => 'Uighur',

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);

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if ( empty( $locale )

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and function_exists( 'is_rtl' ) ) {

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return is_rtl();

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}

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if ( empty( $locale ) ) {

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$locale = determine_locale();

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}

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return isset( $rtl_locales[$locale] );

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}

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/**

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* Loads a translation file into the plugin's text domain.

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* @param string $locale Locale code.

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* @return bool True on success, false on failure.

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function wpcf7_load_textdomain( $locale = '' ) {

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$mofile = path_join(

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WP_LANG_DIR . '/plugins/',

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sprintf( '%s-%s.mo', WPCF7_TEXT_DOMAIN, $locale )

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);

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return load_textdomain( WPCF7_TEXT_DOMAIN, $mofile, $locale );

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}

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/**

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* Unloads translations for the plugin's text domain.

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* @param bool $reloadable Whether the text domain can be loaded

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* just-in-time again.

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* @return bool True on success, false on failure.

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function wpcf7_unload_textdomain( $reloadable = false ) {

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return unload_textdomain( WPCF7_TEXT_DOMAIN, $reloadable );

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}

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/**

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* Switches translation locale, calls the callback, then switches back

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* to the original locale.

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* @param string $locale Locale code.

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* @param callable $callback The callable to be called.

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* @param mixed $args Parameters to be passed to the callback.

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* @return mixed The return value of the callback.

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function wpcf7_switch_locale( $locale, callable $callback, ...$args ) {

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static $available_locales = null;

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if ( ! isset( $available_locales ) ) {

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$available_locales = array_merge(

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array( 'en_US' ),

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get_available_languages()

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);

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}

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$previous_locale = determine_locale();

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$do_switch_locale = (

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$locale !== $previous_locale &&

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in_array( $locale, $available_locales, true ) &&

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in_array( $previous_locale, $available_locales, true )

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);

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if ( $do_switch_locale ) {

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wpcf7_unload_textdomain();

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switch_to_locale( $locale );

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wpcf7_load_textdomain( $locale );

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}

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$result = call_user_func( $callback, ...$args );

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if ( $do_switch_locale ) {

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wpcf7_unload_textdomain( true );

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restore_previous_locale();

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wpcf7_load_textdomain( $previous_locale );

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}

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return $result;

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}

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