From 35e7a2b2adad42b077de60d1566c22da62edeb77 Mon Sep 17 00:00:00 2001
From: MaZderMind
Date: Sun, 18 Dec 2016 13:31:34 +0100
Subject: move upcoming & current logic from javascript/ajax into php

---
 assets/js/lustiges-script.js | 74 --------------------------------------------
 index.php                    |  5 ---
 lib/helper.php               | 31 +++++++++++++++++++
 template/overview.phtml      |  7 +++--
 view/overview.php            | 18 +++++++++++
 view/schedule-json.php       | 13 --------
 6 files changed, 53 insertions(+), 95 deletions(-)
 delete mode 100644 view/schedule-json.php

diff --git a/assets/js/lustiges-script.js b/assets/js/lustiges-script.js
index 78b8758..65fc6ef 100644
--- a/assets/js/lustiges-script.js
+++ b/assets/js/lustiges-script.js
@@ -176,80 +176,6 @@ $(function() {
 	});
 });
 
-// startpage schedule teaser
-$(function() {
-	var
-		updateTimer = 5*1000, /* update display every 5 seconds */
-		refetchTimer = 10*60*1000, /* re-request current / upcoming schedule every 10 minutes */
-		scheduleData = {},
-		$lecture = $('.room.has-schedule');
-
-	if($lecture.length == 0)
-		return;
-
-	function fetchProgram() {
-		$.ajax({
-			url: $('div[data-schedule-url]').data('schedule-url'),
-			dataType: 'json',
-			success: function(data) {
-				scheduleData = data;
-				updateProgtamTeaser();
-			},
-
-			// success & error
-			complete: function() {
-				setTimeout(fetchProgram, refetchTimer);
-			}
-		});
-	}
-
-	function updateProgtamTeaser() {
-		var
-			// corrected "now" timestamp in unix-counting (seconds, not microseconds)
-			now = (Date.now() / 1000);
-
-		$.each(scheduleData, function(room, talks) {
-			var currentTalk, nextTalk;
-
-			$.each(talks, function(room, talk) {
-
-				if(!talk.room_known)
-					return;
-
-				if(talk.start < now && talk.end > now)
-					currentTalk = talk;
-
-				if(!nextTalk && !talk.special && talk.start > now)
-					nextTalk = talk;
-
-			});
-
-			var s = nextTalk ? new Date(nextTalk.start*1000) : new Date();
-			if(currentTalk)
-				$lecture.filter('.room-'+room)
-					.find('.current-talk')
-						.removeClass('hidden')
-						.find('.t')
-							.text(currentTalk.special ? 'none' : currentTalk.title)
-
-			if(nextTalk)
-				$lecture.filter('.room-'+room)
-					.find('.next-talk')
-						.toggleClass('hidden', !nextTalk || nextTalk.special || (nextTalk.start - now > 60*60))
-						.find('strong')
-							.text(s.getHours()+':'+(s.getMinutes() < 10 ? '0' : '')+s.getMinutes())
-						.end()
-						.find('.t')
-							.text(nextTalk ? nextTalk.title : '')
-						.end()
-		});
-
-		setTimeout(updateProgtamTeaser, updateTimer);
-	}
-
-	fetchProgram();
-});
-
 // feedback form
 $(function() {
 	$('.feedback-form').on('submit', function(e) {
diff --git a/index.php b/index.php
index ca0a6d4..409d75e 100644
--- a/index.php
+++ b/index.php
@@ -196,11 +196,6 @@ try {
 		require('view/feedback-read.php');
 	}
 
-	else if($route == 'schedule.json')
-	{
-		require('view/schedule-json.php');
-	}
-
 	else if($route == 'gen/main.css')
 	{
 		if(Conferences::hasCustomStyles($mandator))
diff --git a/lib/helper.php b/lib/helper.php
index df7f329..1925382 100644
--- a/lib/helper.php
+++ b/lib/helper.php
@@ -114,3 +114,34 @@ function url_params()
 
 	return '';
 }
+
+/**
+ * returns the fielst element matching $predicate or null, if none matched.
+ * $predicate is a callable that receives one array value at a time and can
+ * return a bool'ish value
+ */
+function array_filter_first($array, $predicate)
+{
+	foreach ($array as $value) {
+		if( $predicate($value) ) {
+			return $value;
+		}
+	}
+
+	return null;
+}
+/**
+ * returns the fielst element matching $predicate or null, if none matched.
+ * $predicate is a callable that receives one array value at a time and can
+ * return a bool'ish value
+ */
+function array_filter_last($array, $predicate)
+{
+	foreach (array_reverse($array) as $value) {
+		if( $predicate($value) ) {
+			return $value;
+		}
+	}
+
+	return null;
+}
diff --git a/template/overview.phtml b/template/overview.phtml
index 02f0b5f..39cca02 100644
--- a/template/overview.phtml
+++ b/template/overview.phtml
@@ -1,6 +1,6 @@
 <? include("$assemblies/banner.phtml") ?>
 
-<div class="container" data-schedule-url="<?=h($conference->getScheduleJsonUrl())?>">
+<div class="container">
 	<div class="row headline">
 		<div class="col-xs-12">
 			<h1><?=h($title)?></h1>
@@ -78,15 +78,16 @@
 							</a>
 
 							<? if($room->hasSchedule()): ?>
+								<? $upcoming = @$upcomingTalksPerRoom[ $room->getScheduleName() ] ?: [] ?>
 								<div class="program-schedule">
 									<div class="talk current-talk">
 										<strong>Now:</strong>
-										<span class="t">none</span>
+										<span class="t"><?=h(@$upcoming['current']['title'] ?: 'none') ?></span>
 									</div>
 
 									<div class="talk next-talk">
 										<strong>Next Talk:</strong>
-										<span class="t">none</span>
+										<span class="t"><?=h(@$upcoming['next']['title'] ?: 'none') ?></span>
 									</div>
 								</div>
 							<? endif ?>
diff --git a/view/overview.php b/view/overview.php
index 93cf007..adc8d5f 100644
--- a/view/overview.php
+++ b/view/overview.php
@@ -1,8 +1,26 @@
 <?php
 
+$schedule = $conference->getSchedule();
+
+$talksPerRoom = $schedule->getSchedule();
+$now = time() + $schedule->getSimulationOffset();
+
+$upcomingTalksPerRoom = array_map(function($talks) use($now) {
+	return [
+		'current' => array_filter_last($talks, function($talk) use ($now) {
+			return $talk['start'] < $now && $talk['end'] > $now;
+		}),
+		'next' => array_filter_first($talks, function($talk) use ($now) {
+			return !isset($talk['special']) && $talk['start'] > $now;
+		}),
+	];
+}, $talksPerRoom);
+
 echo $tpl->render(array(
 	'page' => 'overview',
 	'title' => 'Live-Streams',
 
 	'overview' => $conference->getOverview(),
+
+	'upcomingTalksPerRoom' => $upcomingTalksPerRoom,
 ));
diff --git a/view/schedule-json.php b/view/schedule-json.php
deleted file mode 100644
index 19346fd..0000000
--- a/view/schedule-json.php
+++ /dev/null
@@ -1,13 +0,0 @@
-<?php
-
-$schedule = $conference->getSchedule();
-if(!$schedule->isEnabled())
-	throw new NotFoundException('Schedule is disabled');
-
-header('Content-Type: application/json');
-
-if($conference->isClosed())
-	echo '{}';
-
-else
-	echo json_encode($schedule->getSchedule(), JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
-- 
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