friendica-addons/cookienotice/cookienotice.php

<?php

/**
 * Name: Cookie Notice
 * Description: Configure, show and handle a simple cookie notice
 * Version: 1.0
 * Author: Peter Liebetrau <https://socivitas/profile/peerteer>
 * 
 */
use Friendica\Core\Addon;
use Friendica\Core\Config;
use Friendica\Core\L10n;

function cookienotice_install()
{
	$file = 'addon/cookienotice/cookienotice.php';
	Addon::registerHook('page_content_top', $file, 'cookienotice_page_content_top');
	Addon::registerHook('page_end', $file, 'cookienotice_page_end');
	Addon::registerHook('addon_settings', $file, 'cookienotice_addon_settings');
	Addon::registerHook('addon_settings_post', $file, 'cookienotice_addon_settings_post');
}

function cookienotice_uninstall()
{
	$file = 'addon/cookienotice/cookienotice.php';
	Addon::unregisterHook('page_content_top', $file, 'cookienotice_page_content_top');
	Addon::unregisterHook('page_end', $file, 'cookienotice_page_end');
	Addon::unregisterHook('addon_settings', $file, 'cookienotice_addon_settings');
	Addon::unregisterHook('addon_settings_post', $file, 'cookienotice_addon_settings_post');
}

function cookienotice_addon_settings(&$a, &$s)
{
	if (!is_site_admin())
		return;

	/* Add our stylesheet to the page so we can make our settings look nice */

	$a->page['htmlhead'] .= '<link rel="stylesheet"  type="text/css" href="/addon/cookienotice/cookienotice.css" media="all" />' . "\r\n";


	$text = Config::get('cookienotice', 'text');
	if (!$text) {
		$text = '';
	}
	$oktext = Config::get('cookienotice', 'oktext');
	if (!$oktext) {
		$oktext = '';
	}

	$t = get_markup_template("settings.tpl", "addon/cookienotice/");
	$s .= replace_macros($t, [
		'$title'	   => L10n::t('"cookienotice" Settings'),
		'$description' => L10n::t('<b>Configure your cookie usage notice.</b> It should just be a notice, saying that the website uses cookies. It is shown as long as a user didnt confirm clicking the OK button.'),
		'$text'		=> ['cookienotice-text', L10n::t('Cookie Usage Notice'), $text, L10n::t('The cookie usage notice')],
		'$oktext'	  => ['cookienotice-oktext', L10n::t('OK Button Text'), $oktext, L10n::t('The OK Button text')],
		'$submit'	  => L10n::t('Save Settings')
	]);

	return;
}

function cookienotice_addon_settings_post(&$a, &$b)
{
	if (!is_site_admin())
		return;

	if ($_POST['cookienotice-submit']) {
		Config::set('cookienotice', 'text', trim(strip_tags($_POST['cookienotice-text'])));
		Config::set('cookienotice', 'oktext', trim(strip_tags($_POST['cookienotice-oktext'])));
		info(L10n::t('cookienotice Settings saved.') . EOL);
	}
}

/**
 * adds the link and script to the page head
 * 
 * @param App $a
 * @param string $b - The page html before page_content_top
 */
function cookienotice_page_content_top($a, &$b)
{
	$head				= file_get_contents(__DIR__ . '/templates/head.tpl');
	$a->page['htmlhead'] .= $head;
}

/**
 * adds the html to page end
 * page_end hook function
 * 
 * @param App $a
 * @param string $b - The page html
 */
function cookienotice_page_end($a, &$b)
{
	$text   = (string) Config::get('cookienotice', 'text');
	$oktext = (string) Config::get('cookienotice', 'oktext');

	$page_end_tpl = get_markup_template("cookienotice.tpl", "addon/cookienotice/");

	$page_end = replace_macros($page_end_tpl, [
		'$text'   => $text,
		'$oktext' => $oktext,
	]);

	$b .= $page_end;
}