<?php
/*
Plugin Name: Loco Translate
Plugin URI: https://wordpress.org/plugins/loco-translate/
Description: Translate themes and plugins directly in WordPress
Author: Tim Whitlock
Version: 2.5.0
Requires at least: 4.1
Requires PHP: 5.2.4
Author URI: https://localise.biz/wordpress/plugin
Text Domain: loco-translate
Domain Path: /languages/
*/

// disallow execution out of context
if( ! function_exists('is_admin') ){
    return;
}


/**
 * Get absolute path to Loco primary plugin file
 * @return string
 */
function loco_plugin_file(){
    return __FILE__;
}


/**
 * Get version of this plugin
 * @return string
 */
function loco_plugin_version(){
    return '2.5.0';
}


/**
 * Get Loco plugin handle, used by WordPress to identify plugin as a relative path
 * @return string probably "loco-translate/loco.php"
 */
function loco_plugin_self(){
    static $handle;
    isset($handle) or $handle = plugin_basename(__FILE__);
    return $handle;
}


/**
 * Get absolute path to plugin root directory
 * @return string __DIR__
 */
function loco_plugin_root(){
    static $root;
    isset($root) or $root = dirname(__FILE__);
    return $root;
}


/**
 * Check whether currently running in debug mode
 * @return bool
 */
function loco_debugging(){
    return apply_filters('loco_debug', WP_DEBUG );
}


/**
 * Whether currently processing an Ajax request
 * @return bool
 */
function loco_doing_ajax(){
    return defined('DOING_AJAX') && DOING_AJAX;
}


/**
 * Evaluate a constant by name
 * @param string
 * @return mixed
 */
function loco_constant( $name ){
    $value = defined($name) ? constant($name) : null;
    // constant values will only be modified in tests
    if( defined('LOCO_TEST') && LOCO_TEST ){
        $value = apply_filters('loco_constant', $value, $name );
        $value = apply_filters('loco_constant_'.$name, $value );
    }
    return $value;
}


/**
 * Runtime inclusion of any file under plugin root
 * @param string PHP file path relative to __DIR__
 * @return mixed return value from included file
 */
function loco_include( $relpath ){
    $path = loco_plugin_root().'/'.$relpath;
    if( ! file_exists($path) ){
        $message = 'File not found: '.$path;
        // debug specifics to error log in case full call stack not visible
        if( 'cli' !== PHP_SAPI ) {
            error_log( sprintf( '[Loco.debug] Failed on loco_include(%s). !file_exists(%s)', var_export($relpath,true), var_export($path,true) ), 0 );
        }
        // handle circular file inclusion error if error class not found
        if( loco_class_exists('Loco_error_Exception') ){
            throw new Loco_error_Exception($message);
        }
        else {
            throw new Exception($message.'; additionally src/error/Exception.php not loadable');
        }
    }
    return include $path;
}


/**
 * Require dependant library once only
 * @param string PHP file path relative to ./lib
 * @return void
 */
function loco_require_lib( $path ){
    require_once loco_plugin_root().'/lib/'.$path;
}


/**
 * Check PHP extension required by Loco and load polyfill if needed
 * @param string
 * @return bool
 */
function loco_check_extension( $name ) {
    static $cache = array();
    if( ! array_key_exists($name,$cache) ) {
        if( extension_loaded($name) ){
            $cache[$name] = true;
        }
        else {
            Loco_error_AdminNotices::warn( sprintf( __('Loco Translate requires the "%s" PHP extension. Ask your hosting provider to install it','loco-translate'), $name ) );
            $class = 'Loco_compat_'.ucfirst($name).'Extension.php';
            $cache[$name] = class_exists($class);
        }
    }
    return $cache[$name];
}


/**
 * Class autoloader for Loco classes under src directory.
 * e.g. class "Loco_foo_Bar" wil be found in "src/foo/Bar.php"
 * Also does autoload for polyfills under "src/compat" if $name < 20 chars
 * 
 * @internal 
 * @param string
 * @return void
 */
function loco_autoload( $name ){
    if( 'Loco_' === substr($name,0,5) ){
        loco_include( 'src/'.strtr( substr($name,5), '_', '/' ).'.php' );
    }
    else if( strlen($name) < 20 ){
        $path = loco_plugin_root().'/src/compat/'.$name.'.php';
        if( file_exists($path) ){
            require $path;
        }
    }
}


/**
 * class_exists wrapper that fails silently.
 * @param string class name
 * @return bool
 */
function loco_class_exists( $class ){
    try {
        return class_exists($class,true);
    }
    catch( Exception $e ){
        return false;
    }
}


// Startup errors will raise notices. Check your error logs if error reporting is quiet
try {
    spl_autoload_register('loco_autoload');

    // provide safe directory for custom translations that won't be deleted during auto-updates
    if ( ! defined( 'LOCO_LANG_DIR' ) ) {
        define( 'LOCO_LANG_DIR', trailingslashit( loco_constant('WP_LANG_DIR') ) . 'loco' );
    }

    // text domain loading helper for custom file locations. Set constant empty to disable
    if ( LOCO_LANG_DIR ) {
        new Loco_hooks_LoadHelper;
    }

    // initialize hooks for admin screens
    if ( is_admin() ) {
        new Loco_hooks_AdminHooks;
    }
    
    // enable wp cli commands
    if( class_exists('WP_CLI',false) ) {
        WP_CLI::add_command('loco','Loco_cli_Commands');
    }

}
catch( Exception $e ){ // PHP5+
    trigger_error(sprintf('[Loco.fatal] %s in %s:%u',$e->getMessage(), $e->getFile(), $e->getLine() ),E_USER_NOTICE);
}
catch( Throwable $e ){ // PHP7+
    trigger_error(sprintf('[Loco.fatal] %s in %s:%u',$e->getMessage(), $e->getFile(), $e->getLine() ),E_USER_NOTICE);
}
