<?php

/**
 * Class EE_Message_Type_Collection_Loader
 *
 * Description
 *
 * @package               Event Espresso
 * @subpackage            core
 * @author                Brent Christensen
 *
 *
 */
class EE_Message_Type_Collection_Loader
{


    /**
     * @type EE_Message_Type_Collection $_message_type_collection
     */
    protected $_message_type_collection = null;



    /**
     * EE_Message_Type_Collection_Loader constructor.
     *
     * @param EE_Message_Type_Collection $message_types
     */
    public function __construct(EE_Message_Type_Collection $message_types)
    {
        $this->set_message_type_collection($message_types);
    }



    /**
     * @return EE_Message_Type_Collection
     */
    public function message_type_collection()
    {
        return $this->_message_type_collection;
    }



    /**
     * @param mixed $message_types
     */
    public function set_message_type_collection(EE_Message_Type_Collection $message_types)
    {
        $this->_message_type_collection = $message_types;
    }



    /**
     * load_message_types
     * globs the supplied filepath and adds any found
     *
     * @param  string $folder
     * @throws \EE_Error
     */
    public function load_message_types_from_folder($folder = '')
    {
        // make sure autoloaders are set (fail-safe)
        EED_Messages::set_autoloaders();
        $folder = ! empty($folder) ? $folder : EE_LIBRARIES . 'messages/message_type';
        $folder .= $folder[ strlen($folder) - 1 ] != '/' ? '/' : '';
        // get all the files in that folder that end in ".class.php
        $filepaths = apply_filters(
            'FHEE__EE_messages__get_installed__messagetype_files',
            glob($folder . '*.class.php')
        );
        if (empty($filepaths)) {
            return;
        }
        foreach ((array) $filepaths as $file_path) {
            // extract filename from path
            $file_path = basename($file_path);
            // now remove any file extensions
            $message_type_class_name = substr($file_path, 0, strpos($file_path, '.'));

            // if this class name doesn't represent a message type class, then we just skip.
            if (strpos(strtolower($message_type_class_name), 'message_type') === false) {
                continue;
            }

            if (! class_exists($message_type_class_name)) {
                throw new EE_Error(
                    sprintf(
                        __('The "%1$s" message type class can\'t be loaded from %2$s. Likely there is a typo in the class name or the file name.', 'event_espresso'),
                        $message_type_class_name,
                        $file_path
                    )
                );
            }

            $this->_load_message_type(new $message_type_class_name);
        }
    }


    /**
     * Loads the given message type into the message type collection if it doesn't already exist.
     * @param EE_message_type $message_type
     * @return bool
     */
    protected function _load_message_type(EE_message_type $message_type)
    {
        if ($this->message_type_collection()->has_by_name($message_type->name)) {
            return true;
        }
        return $this->message_type_collection()->add(
            $message_type,
            $message_type->name
        );
    }
}
