<?php

add_action('wpcf7_init', 'wpcf7_add_form_tag_file', 10, 0);
function wpcf7_add_form_tag_file()
{
    wpcf7_add_form_tag(array('file', 'file*'), 'wpcf7_file_form_tag_handler', array('name-attr' => true, 'file-uploading' => true));
}
function wpcf7_file_form_tag_handler($tag)
{
    if (empty($tag->name)) {
        return '';
    }
    $validation_error = wpcf7_get_validation_error($tag->name);
    $class = wpcf7_form_controls_class($tag->type);
    if ($validation_error) {
        $class .= ' wpcf7-not-valid';
    }
    $atts = array();
    $atts['size'] = $tag->get_size_option('40');
    $atts['class'] = $tag->get_class_option($class);
    $atts['id'] = $tag->get_id_option();
    $atts['tabindex'] = $tag->get_option('tabindex', 'signed_int', true);
    $atts['accept'] = wpcf7_acceptable_filetypes($tag->get_option('filetypes'), 'attr');
    if ($tag->is_required()) {
        $atts['aria-required'] = 'true';
    }
    if ($validation_error) {
        $atts['aria-invalid'] = 'true';
        $atts['aria-describedby'] = wpcf7_get_validation_error_reference($tag->name);
    } else {
        $atts['aria-invalid'] = 'false';
    }
    $atts['type'] = 'file';
    $atts['name'] = $tag->name;
    $atts = wpcf7_format_atts($atts);
    $html = sprintf('<span class="wpcf7-form-control-wrap %1$s"><input %2$s />%3$s</span>', sanitize_html_class($tag->name), $atts, $validation_error);
    return $html;
}
add_filter('wpcf7_validate_file', 'wpcf7_file_validation_filter', 10, 3);
add_filter('wpcf7_validate_file*', 'wpcf7_file_validation_filter', 10, 3);
function wpcf7_file_validation_filter($result, $tag, $args)
{
    $args = wp_parse_args($args, array());
    if (isset($args['uploaded_files'])) {
        $maybe_error = $args['uploaded_files'];
        if (is_wp_error($maybe_error)) {
            $result->invalidate($tag, $maybe_error->get_error_message());
        }
    }
    return $result;
}
add_filter('wpcf7_mail_tag_replaced_file', 'wpcf7_file_mail_tag', 10, 4);
add_filter('wpcf7_mail_tag_replaced_file*', 'wpcf7_file_mail_tag', 10, 4);
function wpcf7_file_mail_tag($replaced, $submitted, $html, $mail_tag)
{
    $submission = WPCF7_Submission::get_instance();
    $uploaded_files = $submission->uploaded_files();
    $name = $mail_tag->field_name();
    if (!empty($uploaded_files[$name])) {
        $paths = (array) $uploaded_files[$name];
        $paths = array_map('wp_basename', $paths);
        $replaced = wpcf7_flat_join($paths);
    }
    return $replaced;
}
add_action('wpcf7_admin_init', 'wpcf7_add_tag_generator_file', 50, 0);
function wpcf7_add_tag_generator_file()
{
    $tag_generator = WPCF7_TagGenerator::get_instance();
    $tag_generator->add('file', __('file', 'contact-form-7'), 'wpcf7_tag_generator_file');
}
function wpcf7_tag_generator_file($contact_form, $args = '')
{
    $args = wp_parse_args($args, array());
    $type = 'file';
    $description = __("Generate a form-tag for a file uploading field. For more details, see %s.", 'contact-form-7');
    $desc_link = wpcf7_link(__('https://contactform7.com/file-uploading-and-attachment/', 'contact-form-7'), __('File uploading and attachment', 'contact-form-7'));
    ?>
<div class="control-box">
<fieldset>
<legend><?php 
    echo sprintf(esc_html($description), $desc_link);
    ?></legend>

<table class="form-table">
<tbody>
	<tr>
	<th scope="row"><?php 
    echo esc_html(__('Field type', 'contact-form-7'));
    ?></th>
	<td>
		<fieldset>
		<legend class="screen-reader-text"><?php 
    echo esc_html(__('Field type', 'contact-form-7'));
    ?></legend>
		<label><input type="checkbox" name="required" /> <?php 
    echo esc_html(__('Required field', 'contact-form-7'));
    ?></label>
		</fieldset>
	</td>
	</tr>

	<tr>
	<th scope="row"><label for="<?php 
    echo esc_attr($args['content'] . '-name');
    ?>"><?php 
    echo esc_html(__('Name', 'contact-form-7'));
    ?></label></th>
	<td><input type="text" name="name" class="tg-name oneline" id="<?php 
    echo esc_attr($args['content'] . '-name');
    ?>" /></td>
	</tr>

	<tr>
	<th scope="row"><label for="<?php 
    echo esc_attr($args['content'] . '-limit');
    ?>"><?php 
    echo esc_html(__("File size limit (bytes)", 'contact-form-7'));
    ?></label></th>
	<td><input type="text" name="limit" class="filesize oneline option" id="<?php 
    echo esc_attr($args['content'] . '-limit');
    ?>" /></td>
	</tr>

	<tr>
	<th scope="row"><label for="<?php 
    echo esc_attr($args['content'] . '-filetypes');
    ?>"><?php 
    echo esc_html(__('Acceptable file types', 'contact-form-7'));
    ?></label></th>
	<td><input type="text" name="filetypes" class="filetype oneline option" id="<?php 
    echo esc_attr($args['content'] . '-filetypes');
    ?>" /></td>
	</tr>

	<tr>
	<th scope="row"><label for="<?php 
    echo esc_attr($args['content'] . '-id');
    ?>"><?php 
    echo esc_html(__('Id attribute', 'contact-form-7'));
    ?></label></th>
	<td><input type="text" name="id" class="idvalue oneline option" id="<?php 
    echo esc_attr($args['content'] . '-id');
    ?>" /></td>
	</tr>

	<tr>
	<th scope="row"><label for="<?php 
    echo esc_attr($args['content'] . '-class');
    ?>"><?php 
    echo esc_html(__('Class attribute', 'contact-form-7'));
    ?></label></th>
	<td><input type="text" name="class" class="classvalue oneline option" id="<?php 
    echo esc_attr($args['content'] . '-class');
    ?>" /></td>
	</tr>

</tbody>
</table>
</fieldset>
</div>

<div class="insert-box">
	<input type="text" name="<?php 
    echo $type;
    ?>" class="tag code" readonly="readonly" onfocus="this.select()" />

	<div class="submitbox">
	<input type="button" class="button button-primary insert-tag" value="<?php 
    echo esc_attr(__('Insert Tag', 'contact-form-7'));
    ?>" />
	</div>

	<br class="clear" />

	<p class="description mail-tag"><label for="<?php 
    echo esc_attr($args['content'] . '-mailtag');
    ?>"><?php 
    echo sprintf(esc_html(__("To attach the file uploaded through this field to mail, you need to insert the corresponding mail-tag (%s) into the File Attachments field on the Mail tab.", 'contact-form-7')), '<strong><span class="mail-tag"></span></strong>');
    ?><input type="text" class="mail-tag code hidden" readonly="readonly" id="<?php 
    echo esc_attr($args['content'] . '-mailtag');
    ?>" /></label></p>
</div>
<?php 
}