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<?php
// Prevent loading this file directly
defined( 'ABSPATH' ) || exit;

if ( ! class_exists( 'THE7_RWMB_Checkbox_Field' ) )
{
	class THE7_RWMB_Checkbox_Field
	{
		/**
		 * Get field HTML
		 *
		 * @param string $html
		 * @param mixed  $meta
		 * @param array  $field
		 *
		 * @return string
		 */
		static function html( $html, $meta, $field )
		{
			return sprintf(
				'<input type="checkbox" class="the7-mb-checkbox" name="%s" id="%s" value="1" %s />',
				$field['field_name'],
				$field['id'],
				checked( !empty( $meta ), 1, false )
			);
		}

		/**
		 * Set the value of checkbox to 1 or 0 instead of 'checked' and empty string
		 * This prevents using default value once the checkbox has been unchecked
		 *
		 * @link https://github.com/rilwis/meta-box/issues/6
		 *
		 * @param mixed $new
		 * @param mixed $old
		 * @param int   $post_id
		 * @param array $field
		 *
		 * @return int
		 */
		static function value( $new, $old, $post_id, $field )
		{
			return empty( $new ) ? 0 : 1;
		}

		/**
		 * Standard meta retrieval
		 *
		 * @param mixed $meta
		 * @param int   $post_id
		 * @param array $field
		 * @param bool  $saved
		 *
		 * @return mixed
		 */
		static function meta( $meta, $post_id, $saved, $field )
		{
			$meta = get_post_meta( $post_id, $field['id'], !$field['multiple'] );

			// Use $field['std'] only when the meta box hasn't been saved (i.e. the first time we run)
			$meta = ( !$saved && '' === $meta || array() === $meta ) ? $field['std'] : $meta;
			$meta = is_array( $meta ) ? array_map( 'esc_attr', $meta ) : esc_attr( $meta );

			return $meta;
		}
	}
}