Add new footer hook

- Add new App->footerScripts array
- Add footer.tpl template
- Add documentation
- Rework App->init_page_end to App->initFooter

doc/Addons.md

@@ -286,6 +286,11 @@ No hook data.
 Called after HTML content functions have completed.
 `$b` is (string) HTML of content div.
 
+### footer
+Called after HTML content functions have completed.
+`$b` is (string) HTML of footer div/element.
+Used to load deferred Javascript files.
+
 ### avatar_lookup
 Called when looking up the avatar. `$b` is an array:
 
@@ -563,6 +568,7 @@ Here is a complete list of all hook callbacks with file locations (as of 01-Apr-
 ### src/App.php
 
     Addon::callHooks('load_config');
+    Addon::callHooks('footer');
 
 ### src/Model/Item.php
 

index.php

@@ -153,10 +153,6 @@ if (! x($_SESSION, 'authenticated')) {
 	header('X-Account-Management-Status: none');
 }
 
-/* set up page['htmlhead'] and page['end'] for the modules to use */
-$a->page['htmlhead'] = '';
-$a->page['end'] = '';
-
 $_SESSION['sysmsg']       = defaults($_SESSION, 'sysmsg'      , []);
 $_SESSION['sysmsg_info']  = defaults($_SESSION, 'sysmsg_info' , []);
 $_SESSION['last_updated'] = defaults($_SESSION, 'last_updated', []);
@@ -326,10 +322,6 @@ if (file_exists($theme_info_file)) {
 
 /* initialise content region */
 
-if (! x($a->page, 'content')) {
-	$a->page['content'] = '';
-}
-
 if ($a->mode == App::MODE_NORMAL) {
 	Addon::callHooks('page_content_top', $a->page['content']);
 }
@@ -411,18 +403,7 @@ $a->init_pagehead();
  * Build the page ending -- this is stuff that goes right before
  * the closing </body> tag
  */
-$a->init_page_end();
+$a->initFooter();
-
-// If you're just visiting, let javascript take you home
-if (x($_SESSION, 'visitor_home')) {
-	$homebase = $_SESSION['visitor_home'];
-} elseif (local_user()) {
-	$homebase = 'profile/' . $a->user['nickname'];
-}
-
-if (isset($homebase)) {
-	$a->page['content'] .= '<script>var homebase="' . $homebase . '" ; </script>';
-}
 
 /*
  * now that we've been through the module content, see if the page reported
@@ -444,23 +425,6 @@ if ($a->module != 'install' && $a->module != 'maintenance') {
 	Nav::build($a);
 }
 
-/*
- * Add a "toggle mobile" link if we're using a mobile device
- */
-if ($a->is_mobile || $a->is_tablet) {
-	if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
-		$link = 'toggle_mobile?address=' . curPageURL();
-	} else {
-		$link = 'toggle_mobile?off=1&address=' . curPageURL();
-	}
-	$a->page['footer'] = replace_macros(
-		get_markup_template("toggle_mobile_footer.tpl"),
-		[
-			'$toggle_link' => $link,
-			'$toggle_text' => L10n::t('toggle mobile')]
-	);
-}
-
 /**
  * Build the page - now that we have all the components
  */

src/App.php

@@ -96,6 +96,15 @@ class App
 	public $force_max_items = 0;
 	public $theme_events_in_profile = true;
 
+	public $footerScripts = [];
+
+	public function registerFooterScript($path)
+	{
+		$url = str_replace($this->get_basepath() . DIRECTORY_SEPARATOR, '', $path);
+
+		$this->footerScripts[] = $this->get_baseurl() . '/' . trim($url, '/');
+	}
+
 	/**
 	 * @brief An array for all theme-controllable parameters
 	 *
@@ -802,15 +811,45 @@ class App
 		]) . $this->page['htmlhead'];
 	}
 
-	public function init_page_end()
+	public function initFooter()
 	{
-		if (!isset($this->page['end'])) {
+		if (!isset($this->page['footer'])) {
-			$this->page['end'] = '';
+			$this->page['footer'] = '';
 		}
-		$tpl = get_markup_template('end.tpl');
+
-		$this->page['end'] = replace_macros($tpl, [
+		// If you're just visiting, let javascript take you home
-			'$baseurl' => $this->get_baseurl()
+		if (!empty($_SESSION['visitor_home'])) {
-		]) . $this->page['end'];
+			$homebase = $_SESSION['visitor_home'];
+		} elseif (local_user()) {
+			$homebase = 'profile/' . $a->user['nickname'];
+		}
+
+		if (isset($homebase)) {
+			$this->page['footer'] .= '<script>var homebase="' . $homebase . '";</script>' . "\n";
+		}
+
+		/*
+		 * Add a "toggle mobile" link if we're using a mobile device
+		 */
+		if ($this->is_mobile || $this->is_tablet) {
+			if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
+				$link = 'toggle_mobile?address=' . curPageURL();
+			} else {
+				$link = 'toggle_mobile?off=1&address=' . curPageURL();
+			}
+			$this->page['footer'] .= replace_macros(get_markup_template("toggle_mobile_footer.tpl"), [
+				'$toggle_link' => $link,
+				'$toggle_text' => Core\L10n::t('toggle mobile')
+			]);
+		}
+
+		Core\Addon::callHooks('footer', $this->page['footer']);
+
+		$tpl = get_markup_template('footer.tpl');
+		$this->page['footer'] .= replace_macros($tpl, [
+			'$baseurl' => $this->get_baseurl(),
+			'$footerScripts' => $this->footerScripts,
+		]);
 	}
 
 	public function set_curl_code($code)

view/templates/footer.tpl

@@ -0,0 +1,3 @@
+{{foreach $footerScripts as $scriptUrl}}
+<script type="text/javascript" src="{{$scriptUrl}}"></script>
+{{/foreach}}