<?php
/**
 * "Show on every page": one form, as a pop-up or a corner button, across
 * the whole site - no page editing. Skips the pages the site owner lists,
 * and (by default) the WooCommerce cart, checkout and account pages, where
 * a pop-up only gets in the way.
 *
 * @package Emails404
 */

namespace Emails404;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class Site_Display {

	const OPTION = 'emails404_site_display';

	/** The saved setting, with defaults filled in. */
	public static function get() {
		$saved = get_option( self::OPTION, array() );
		$saved = is_array( $saved ) ? $saved : array();
		return array_merge(
			array(
				'enabled'    => false,
				'form'       => '',
				'mode'       => Embed::MODE_POPUP,
				'trigger'    => Embed::TRIGGER_DELAY,
				'delay'      => Embed::DEFAULT_DELAY_SECONDS,
				'scroll'     => Embed::DEFAULT_SCROLL_PERCENT,
				'frequency'  => Embed::DEFAULT_FREQUENCY_DAYS,
				'label'      => '',
				'position'   => 'bottom-right',
				'launcher'   => false,
				'hide_paths' => '',
				'hide_shop'  => true,
			),
			$saved
		);
	}

	/**
	 * Saves the setting from the admin form's fields, cleaned the same way
	 * as a block or shortcode. A pop-up or corner button only - an in-page
	 * form belongs in a page, via the block or shortcode.
	 *
	 * @param array $raw Unslashed POST fields without the prefix.
	 */
	public static function save( array $raw ) {
		$options = Embed::normalize_options(
			array(
				'form'      => isset( $raw['form'] ) ? $raw['form'] : '',
				'mode'      => isset( $raw['mode'] ) ? $raw['mode'] : Embed::MODE_POPUP,
				'trigger'   => isset( $raw['trigger'] ) ? $raw['trigger'] : Embed::TRIGGER_DELAY,
				'delay'     => isset( $raw['delay'] ) ? $raw['delay'] : null,
				'scroll'    => isset( $raw['scroll'] ) ? $raw['scroll'] : null,
				'frequency' => isset( $raw['frequency'] ) ? $raw['frequency'] : null,
				'label'     => isset( $raw['label'] ) ? $raw['label'] : '',
				'position'  => isset( $raw['position'] ) ? $raw['position'] : 'bottom-right',
				'launcher'  => ! empty( $raw['launcher'] ),
			)
		);
		$enabled = ! empty( $raw['enabled'] ) && null !== $options;
		$stored  = null !== $options ? $options : self::get();
		if ( Embed::MODE_INLINE === $stored['mode'] ) {
			$stored['mode'] = Embed::MODE_POPUP;
		}
		$stored['enabled']    = $enabled;
		$stored['hide_paths'] = self::clean_paths( isset( $raw['hide_paths'] ) ? (string) $raw['hide_paths'] : '' );
		$stored['hide_shop']  = ! empty( $raw['hide_shop'] );
		update_option( self::OPTION, $stored, true );
	}

	/** One path per line, each starting with "/", no host, no query - at most 50. */
	public static function clean_paths( $text ) {
		$paths = array();
		foreach ( preg_split( '/[\r\n,]+/', $text ) as $line ) {
			$line = trim( $line );
			if ( '' === $line ) {
				continue;
			}
			$path = (string) wp_parse_url( $line, PHP_URL_PATH );
			if ( '' === $path ) {
				continue;
			}
			$paths[] = '/' . trim( $path, '/' ) . ( '/' === $path ? '' : '/' );
		}
		return implode( "\n", array_slice( array_values( array_unique( str_replace( '//', '/', $paths ) ) ), 0, 50 ) );
	}

	/**
	 * Whether the every-page form shows on a page with this path. A listed
	 * path also hides everything under it ("/shop/" hides "/shop/roses/").
	 *
	 * @param array  $setting      Output of get().
	 * @param string $request_path The current page's path, e.g. "/about/".
	 * @param bool   $is_shop_page Whether it's a WooCommerce cart, checkout or account page.
	 */
	public static function should_show( array $setting, $request_path, $is_shop_page ) {
		if ( empty( $setting['enabled'] ) || ! Embed::is_valid_form_id( (string) $setting['form'] ) ) {
			return false;
		}
		if ( $is_shop_page && ! empty( $setting['hide_shop'] ) ) {
			return false;
		}
		$path = '/' . trim( (string) $request_path, '/' ) . '/';
		$path = '//' === $path ? '/' : $path;
		foreach ( array_filter( explode( "\n", (string) $setting['hide_paths'] ) ) as $hidden ) {
			if ( '/' === $hidden ? '/' === $path : 0 === strpos( $path, $hidden ) ) {
				return false;
			}
		}
		return true;
	}

	/** wp_footer: prints the form's script on every page it should show on. */
	public static function print_footer_script() {
		if ( is_admin() || is_feed() || is_embed() || ! Settings::is_connected() ) {
			return;
		}
		$setting = self::get();
		$path    = isset( $_SERVER['REQUEST_URI'] ) ? (string) wp_parse_url( esc_url_raw( wp_unslash( $_SERVER['REQUEST_URI'] ) ), PHP_URL_PATH ) : '/';
		$home    = (string) wp_parse_url( home_url( '/' ), PHP_URL_PATH );
		if ( '' !== $home && '/' !== $home && 0 === strpos( $path, rtrim( $home, '/' ) ) ) {
			// A site installed in a subfolder: compare paths within the site.
			$path = substr( $path, strlen( rtrim( $home, '/' ) ) );
		}
		if ( ! self::should_show( $setting, $path, self::is_shop_page() ) ) {
			return;
		}
		echo Embed::render( $setting ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- built by wp_get_script_tag(), which escapes every attribute.
	}

	private static function is_shop_page() {
		return ( function_exists( 'is_cart' ) && is_cart() )
			|| ( function_exists( 'is_checkout' ) && is_checkout() )
			|| ( function_exists( 'is_account_page' ) && is_account_page() );
	}
}