From 44f999c0cb6e62affec2a2e9817a3abb10a3a75b Mon Sep 17 00:00:00 2001
From: Jannik Schönartz
Date: Fri, 17 Jan 2020 00:09:23 +0100
Subject: [sysconfig] Screensaver: Add a full fledged back button experience

Processing of Screensaver_Text is now only handled in the Screensaver_text preprocess
---
 .../sysconfig/addmodule_screensaver.inc.php        | 25 +++++++++++++++-------
 .../sysconfig/templates/screensaver-start.html     |  3 ++-
 .../sysconfig/templates/screensaver-text.html      |  9 +++++---
 3 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/modules-available/sysconfig/addmodule_screensaver.inc.php b/modules-available/sysconfig/addmodule_screensaver.inc.php
index 7417c200..b8e5d3cd 100644
--- a/modules-available/sysconfig/addmodule_screensaver.inc.php
+++ b/modules-available/sysconfig/addmodule_screensaver.inc.php
@@ -12,7 +12,10 @@ class Screensaver_Start extends AddModule_Base
 	protected function preprocessInternal()
 	{
 		/* Load or initialise session data */
-		if ($this->edit !== false) {
+		if (Request::get('back', 'false', 'string') !== 'false')
+			/* If coming via the back button, load the session data */
+			$this->session_data = Session::get('data');
+		elseif ($this->edit !== false) {
 			$this->session_data = array(
 				'title' => $this->edit->title(),
 				'qss' => $this->edit->getData('qss'),
@@ -62,7 +65,6 @@ class Screensaver_Start extends AddModule_Base
 			'qss' => $this->session_data['qss'],
 		));
 	}
-
 }
 
 class Screensaver_Text extends AddModule_Base
@@ -85,6 +87,13 @@ class Screensaver_Text extends AddModule_Base
 
 		Session::set('data', $this->session_data);
 		Session::save();
+
+		$next = Request::post('next', '', 'string');
+
+		if ($next === '')
+			Util::redirect('?do=SysConfig&action=addmodule&step=Screensaver_Finish');
+		elseif ($next === 'start')
+			Util::redirect('?do=SysConfig&action=addmodule&step=Screensaver_Start&back=true');
 	}
 
 	protected function renderInternal()
@@ -113,15 +122,18 @@ class Screensaver_Text extends AddModule_Base
 		$data['text_value'] = $this->session_data['texts']['text-' . $next];
 		$data['text_locked_value'] = $this->session_data['texts']['text-' . $next . '-locked'];
 		$data['inherit_locked'] = $this->session_data['texts'][$next . '-inherit'];
+		$data['step'] = 'Screensaver_Text';
 
+		/* Set next and prev pages */
 		if ($next === 'idle-kill') {
 			$data['next'] = 'no-timeout';
-			$data['step'] = 'Screensaver_Text';
+			$data['prev'] = 'start';
 		} elseif ($next === 'no-timeout') {
 			$data['next'] = 'shutdown';
-			$data['step'] = 'Screensaver_Text';
+			$data['prev'] = 'idle-kill';
 		} elseif ($next === 'shutdown') {
-			$data['step'] = 'Screensaver_Finish';
+			$data['next'] = '';
+			$data['prev'] = 'no-timeout';
 			$data['lastStep'] = true;
 		}
 
@@ -136,9 +148,6 @@ class Screensaver_Finish extends AddModule_Base
 		/* Get session data */
 		$session_data = Session::get('data');
 
-		/* Process the last step */
-		Screensaver_Helper::processScreensaverText($session_data, Request::post('id', '', 'string'));
-
 		if (empty($session_data['title'])) {
 			Message::addError('missing-title');
 			Util::redirect('?do=SysConfig');
diff --git a/modules-available/sysconfig/templates/screensaver-start.html b/modules-available/sysconfig/templates/screensaver-start.html
index ab1382bd..38610365 100644
--- a/modules-available/sysconfig/templates/screensaver-start.html
+++ b/modules-available/sysconfig/templates/screensaver-start.html
@@ -89,7 +89,8 @@
 
 	<hr>
 	<div class="btn-group">
-		<a class="btn btn-default" id="btn-back" tabindex="5" onclick="window.history.back()">{{lang_back}}</a>
+		<a class="btn btn-default" id="btn-back" tabindex="5"
+			{{#edit}}href="?do=sysconfig"{{/edit}}{{^edit}}href="?do=SysConfig&action=addmodule"{{/edit}}>{{lang_back}}</a>
 	</div>
 	<div class="btn-group pull-right">
 		<button type="submit" id="btn-next" tabindex="6" class="btn btn-primary">{{lang_next}} &raquo;</button>
diff --git a/modules-available/sysconfig/templates/screensaver-text.html b/modules-available/sysconfig/templates/screensaver-text.html
index 1aa45a90..9fd0cea4 100644
--- a/modules-available/sysconfig/templates/screensaver-text.html
+++ b/modules-available/sysconfig/templates/screensaver-text.html
@@ -1,6 +1,6 @@
 <form role="form" enctype="multipart/form-data" method="post" action="?do=SysConfig&amp;action=addmodule&amp;step={{step}}">
 	<input type="hidden" name="token" value="{{token}}">
-	<input type="hidden" name="next" value="{{next}}">
+	<input type="hidden" id="next" name="next" value="{{next}}">
 	<input type="hidden" name="id" value="{{id}}">
 	<input type="hidden" name="edit" value="{{edit}}">
 
@@ -47,7 +47,7 @@
 	</div>
 
 	<div class="btn-group">
-		<a class="btn btn-default" onclick="window.history.back()" tabindex="5">{{lang_back}}</a>
+		<button class="btn btn-default" type="submit" onclick="goBack()" tabindex="5">{{lang_back}}</button>
 	</div>
 	<div class="btn-group pull-right">
 		<button type="submit" class="btn btn-primary" tabindex="6">
@@ -80,7 +80,6 @@
 		switchMode({{inherit_locked}});
 	}, false);
 
-
 	function switchMode(mode) {
 		// true = inherit on
 		// false = inherit off
@@ -98,6 +97,10 @@
 			$('#inherit_locked').val(false);
 		}
 	}
+
+	function goBack() {
+		$('#next').val('{{prev}}');
+	}
 </script>
 
 <style>
-- 
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