<?php

/**
 * EE_Template_Layout
 * For very customized layouts, where you provide this class with the location of
 * a template file to use for laying out the form section. Inherits from EE_Div_per_Section
 * in case you call layout_input() or layout_subsection(), or get_html_for_label(),
 * get_html_for_input(), or get_html_for_errors() on one if the form section's inputs.
 * When would you want to use this instead of just laying out the form's subsections manually
 * in a template file? When you want a very customized layout, but that layout is essential
 * to the form; so that if you were to use the same form on two different pages (eg a contact form,
 * one on the website's frontend for contacting the site admin, and then again on the backend for
 * contacting the plugin's developer), you would still use this exact same template layout strategy.
 * (Eg, if you wanted to add a button to that same form for automatically adding "@gmail.com" or "@yahoo.com"
 * onto the 'from' input. The input is important to the form section on either page, but isn't an input so it's best
 * added as a part of the template layout.)
 *
 * @package               Event Espresso
 * @subpackage
 * @author                Mike Nelson
 * ------------------------------------------------------------------------
 */
class EE_Template_Layout extends EE_Div_Per_Section_Layout
{

    protected $_layout_template_file       = null;

    protected $_layout_begin_template_file = null;

    protected $_input_template_file        = null;

    protected $_subsection_template_file   = null;

    protected $_layout_end_template_file   = null;

    protected $_template_args              = array();



    /**
     * @param array $template_options {
     * @type string $_layout_template_file
     * @type string $_begin_template_file
     * @type string $_input_template_file
     * @type string $_subsection_template_file
     * @type string $_end_template_file
     * @type array  $_template_args
     *                                }
     */
    public function __construct($template_options = array())
    {
        // loop through incoming options
        foreach ($template_options as $key => $value) {
            // add underscore to $key to match property names
            $_key = '_' . $key;
            if (property_exists($this, $_key)) {
                $this->{$_key} = $value;
            }
        }
        parent::__construct();
    }



    /**
     * Also has the side effect of enqueuing any needed JS and CSS for
     * this form.
     * Creates all the HTML necessary for displaying this form, its inputs, and
     * proper subsections.
     * Returns the HTML
     *
     * @return string
     */
    public function layout_form()
    {
        if ($this->_layout_template_file) {
            return EEH_Template::locate_template($this->_layout_template_file, $this->template_args(), true, true);
        } else {
            return parent::layout_form();
        }
    }



    /**
     * opening div tag for a form
     *
     * @return string
     */
    public function layout_form_begin()
    {
        if ($this->_layout_begin_template_file) {
            return EEH_Template::locate_template(
                $this->_layout_begin_template_file,
                $this->template_args(),
                true,
                true
            );
        } else {
            return parent::layout_form_begin();
        }
    }



    /**
     * If an input_template_file was provided upon construction, uses that to layout the input. Otherwise uses parent.
     *
     * @see EE_DIv_Per_Section_Layout::layout_input() for documentation
     * @param EE_Form_Input_Base $input
     * @return string
     */
    public function layout_input($input)
    {
        if ($this->_input_template_file) {
            return EEH_Template::locate_template($this->_input_template_file, array('input' => $input), true, true);
        }
        return parent::layout_input($input);
    }



    /**
     * If a subsection_template_file was provided upon construction, uses that to layout the subsection. Otherwise uses parent.
     *
     * @see EE_Div_Per_Section_Layout::layout_subsection() for documentation
     * @param EE_Form_Section_Proper $form_section
     * @return string
     */
    public function layout_subsection($form_section)
    {
        if ($this->_subsection_template_file) {
            return EEH_Template::locate_template($this->_subsection_template_file, $this->template_args(), true, true);
        }
        return parent::layout_subsection($form_section);
    }



    /**
     * closing div tag for a form
     *
     * @return string
     */
    public function layout_form_end()
    {
        if ($this->_layout_end_template_file) {
            return EEH_Template::locate_template($this->_layout_end_template_file, $this->template_args(), true, true);
        } else {
            return parent::layout_form_end();
        }
    }



    /**
     * @param array $template_args
     */
    public function set_template_args($template_args = array())
    {
        $this->_template_args = $template_args;
    }



    /**
     * @param array $template_args
     */
    public function add_template_args($template_args = array())
    {
        $this->_template_args = array_merge_recursive($this->_template_args, $template_args);
    }



    /**
     * @return array
     */
    public function template_args()
    {
        foreach ($this->form_section()->subsections() as $subsection_name => $subsection) {
            $subsection_name = self::prep_form_subsection_key_name($subsection_name);
            if (strpos($subsection_name, '[') !== false) {
                $sub_name = explode('[', $subsection_name);
                $this->_template_args[ $sub_name[0] ][ rtrim($sub_name[1], ']') ] = $this->layout_subsection($subsection);
            } else {
                $this->_template_args[ $subsection_name ] = $this->layout_subsection($subsection);
            }
        }
        //      d( $this->_template_args );
        return $this->_template_args;
    }



    /**
     * prep_form_section_key_name
     *
     * @access public
     * @param string $subsection_name
     * @return string
     */
    public static function prep_form_subsection_key_name($subsection_name = '')
    {
        $subsection_name = str_replace(array('-', ' '), array('', '_'), $subsection_name);
        return is_numeric(substr($subsection_name, 0, 1)) ? 'form_' . $subsection_name : $subsection_name;
    }



    /**
     * get_subform - just a wrapper for the above method
     *
     * @access public
     * @param string $subsection_name
     * @return string
     */
    public static function get_subform_name($subsection_name = '')
    {
        return EE_Template_Layout::prep_form_subsection_key_name($subsection_name);
    }
}
