feat: allow to generate confence class from json

# Conflicts:
#	model/Conferences.php

command/download.php

@@ -164,38 +164,3 @@ function download($what, $url, $cache)
 	}
 	return true;
 }
-
-function do_download($url, $cache)
-{
-	$handle = curl_init($url);
-	curl_setopt_array($handle, [
-		CURLOPT_FOLLOWLOCATION  => true,
-		CURLOPT_MAXREDIRS       => 10,
-		CURLOPT_RETURNTRANSFER  => true,
-		CURLOPT_SSL_VERIFYPEER  => false, /* accept all certificates, even self-signed */
-		CURLOPT_SSL_VERIFYHOST  => 2,     /* verify hostname is in cert */
-		CURLOPT_CONNECTTIMEOUT  => 3,     /* connect-timeout in seconds */
-		CURLOPT_TIMEOUT         => 5,     /* transfer timeout im seconds */
-		CURLOPT_REDIR_PROTOCOLS => CURLPROTO_HTTP | CURLPROTO_HTTPS,
-		CURLOPT_USERAGENT       => '@c3voc Streaming-Website Downloader-Cronjob, Contact voc AT c3voc DOT de in case of problems. Might the Winkekatze be with you',
-	]);
-
-	$return = curl_exec($handle);
-	$info = curl_getinfo($handle);
-	curl_close($handle);
-
-	if($info['http_code'] != 200)
-		return 'http-code = '.$info['http_code'];
-
-	$tempfile = tempnam(dirname($cache), 'dl-');
-	if(!$tempfile)
-		return 'could not create tempfile in '.dirname($cache);
-
-	if(false === file_put_contents($tempfile, $return))
-		return 'could write data into tempfile '.$tempfile;
-
-	chmod($tempfile, 0644);
-	rename($tempfile, $cache);
-
-	return true;
-}

index.php

@@ -15,8 +15,10 @@ require_once('lib/Exceptions.php');
 require_once('lib/less.php/Less.php');
 
 require_once('model/ModelBase.php');
+require_once('model/ModelJson.php');
 require_once('model/Conferences.php');
 require_once('model/Conference.php');
+require_once('model/ConferenceJson.php');
 require_once('model/GenericConference.php');
 require_once('model/Feedback.php');
 require_once('model/Schedule.php');

lib/helper.php

@@ -172,3 +172,66 @@ function slugify($text)
 
 	return $text;
 }
+
+function do_download($url, $cache, $return_response = false)
+{
+	$handle = curl_init($url);
+	curl_setopt_array($handle, [
+		CURLOPT_FOLLOWLOCATION  => true,
+		CURLOPT_MAXREDIRS       => 10,
+		CURLOPT_RETURNTRANSFER  => true,
+		CURLOPT_SSL_VERIFYPEER  => false, /* accept all certificates, even self-signed */
+		CURLOPT_SSL_VERIFYHOST  => 2,     /* verify hostname is in cert */
+		CURLOPT_CONNECTTIMEOUT  => 3,     /* connect-timeout in seconds */
+		CURLOPT_TIMEOUT         => 5,     /* transfer timeout im seconds */
+		CURLOPT_REDIR_PROTOCOLS => CURLPROTO_HTTP | CURLPROTO_HTTPS,
+		CURLOPT_USERAGENT       => '@c3voc Streaming-Website Downloader-Cronjob, Contact voc AT c3voc DOT de in case of problems. Might the Winkekatze be with you',
+	]);
+
+	$return = curl_exec($handle);
+	$info = curl_getinfo($handle);
+	curl_close($handle);
+
+	// TODO: should we add proper exceptions?
+	if($info['http_code'] != 200)
+		return 'http-code = '.$info['http_code'];
+
+	$tempfile = tempnam(dirname($cache), 'dl-');
+	if(!$tempfile)
+		return 'could not create tempfile in '.dirname($cache);
+
+	if(false === file_put_contents($tempfile, $return))
+		return 'could write data into tempfile '.$tempfile;
+
+	chmod($tempfile, 0644);
+	rename($tempfile, $cache);
+
+	return $return_response ? $return : true;
+}
+
+
+// specifies the number of seconds after which data will be refreshed
+static $cache_lifetime	= 300; // 5min
+$check_time = time() - $cache_lifetime;
+
+function query_data($operation, $query, $variables = [], $assoc = false, $cache = null) {
+	global $check_time;
+
+	$cache = $cache ?: joinpath([$GLOBALS['BASEDIR'], 'cache', $operation, http_build_query($variables) . '.json']);
+
+	if (file_exists($cache) && filemtime($cache) > $check_time) {
+		$res = file_get_contents($cache);
+	} else {
+		$url = 'https://data.c3voc.de/graphql?variables=' .json_encode($variables) . '&query=' . urlencode(preg_replace('/\s\s+/', ' ', $query));
+		$res = do_download($url, $cache, true);
+	}
+	$r = json_decode($res, $assoc);
+
+	if (is_null($r)) {
+		throw new NotFoundException();
+	}
+
+	// TODO: add error handling?
+	// TODO: should we return the cached value, when we did not get an answer? 
+	return $assoc ? @$r['data'] : @$r->data;
+}

model/ConferenceJson.php

@@ -0,0 +1,133 @@
+<?php
+
+class ConferenceJson extends Conference
+{
+	private $start;
+	private $end;
+	private $rooms;
+
+	public function __construct($json, $mandator)
+	{
+		$c = $json->conference;
+		$this->start = DateTime::createFromFormat('c', @$c->start ?: @$c->startDate);
+		$this->end =   DateTime::createFromFormat('c', @$c->end   ?: @$c->endDate);
+	
+		$groups = [];
+		// if ( $c->streamingConfig->overviewPage->sections )
+		foreach(@$c->streamingConfig->overviewPage->sections as $s) {
+			$groups[@$s->title] = array_map(
+				function($r) { return $r->slug; }, 
+				@$s->items ?: @$s->rooms ?: []
+			);
+		}
+
+		$this->rooms = [];
+		$rooms = @$c->rooms->nodes ?: $c->rooms;
+		foreach($rooms as $r) {
+			$this->rooms[$r->slug] = array_merge(
+				get_object_vars($r), 
+				@get_object_vars($r->streamingConfig) ?: [], 
+				@get_object_vars($r->streamingConfig->chat) ?: []
+			);
+		}
+		parent::__construct([
+			'conference' => array_merge([
+				'title' 		=> $c->title,
+				'author' 		=> $c->organizer,
+				'description' 	=> $c->description,
+				'keywords'		=> @implode(', ', $c->keywords),
+			], @get_object_vars($c->streamingConfig) ?: []),
+
+			'rooms' => $this->rooms,
+
+			'overview' => [
+				'groups' => $groups
+			]
+
+		], $mandator ?: $c->acronym);
+	}
+
+	public function has($keychain)
+	{
+		return ModelJson::_has($this->config, $keychain);
+	}
+
+	public function get($keychain, $default = null)
+	{
+		return ModelJson::_get($this->config, $keychain, $default);
+	}
+
+	/*
+	public function getTitle() {
+		return $this->data->conference->title;
+	}
+
+	public function hasAuthor() {
+		return !empty($this->data->conference->organizer);
+	}
+	public function getAuthor() {
+		return $this->data->conference->organizer ?: '';
+	}
+	*/
+
+	public function startsAt() {
+		return $this->start;
+	}
+
+	public function endsAt() {
+		return $this->end;
+	}
+
+	public function hasEnded() {
+		// on the preview-domain no conference ever ends
+		if($this->isPreviewEnabled())
+			return false;
+
+		if($this->has('CONFERENCE.CLOSED')) {
+			$closed = $this->get('CONFERENCE.CLOSED');
+
+			if($closed == "after" || $closed === true)
+				return true;
+			else if($closed == "running" || $closed == "before" ||
+				$closed === false)
+				return false;
+		}
+
+		if($this->end) {
+			$now = new DateTime('now');
+			return $now >= $this->end;
+		} else {
+			return false;
+		}
+	}
+
+	public function getRooms()
+	{
+		$rooms = array();
+		foreach($this->rooms as $slug => $room)
+			$rooms[] = $this->getRoom($slug);
+
+		return $rooms;
+	}
+
+	public function getRoomIfExists($room)
+	{
+		if($this->hasRoom($room))
+			return $this->getRoom($room);
+
+		return null;
+	}
+
+	public function hasRoom($slug)
+	{
+		return array_key_exists($slug, $this->rooms);
+	}
+
+	public function getRoom($slug) {
+		return new Room($this, $slug);
+	}
+
+	public function hasFeedback() {
+		return $this->has('FEEDBACK');
+	}
+}

model/Conferences.php

@@ -65,7 +65,7 @@ class Conferences
 	}
 
 	public static function getLastConference() {
-		return Conferences::getFinishedConferencesSorted()[0];
+		return @Conferences::getFinishedConferencesSorted()[0];
 	}
 
 	public static function exists($mandator) {
@@ -100,26 +100,67 @@ class Conferences
 	}
 
 	public static function loadConferenceConfig($mandator) {
+
+		// try to find config.json for this conference/mandator in local configs
+		$configfile = forceslash(Conferences::MANDATOR_DIR).forceslash($mandator).'config.json';
+
+		if (file_exists($configfile)) {
+
+			$data = file_get_contents($configfile); 
+			$config = json_decode($data);
+			
+			if(is_null($config)) {
+				throw new ConfigException("Loading $configfile did not return an object. Maybe it's not a real JSON file?" . json_last_error_msg());
+			}
+
+			return new ConferenceJson($config, $mandator);
+		}
+
+
+		// try to find config.php for this conference/mandator in local configs
 		$configfile = forceslash(Conferences::MANDATOR_DIR).forceslash($mandator).'config.php';
-
-		try {
+	
+		if (file_exists($configfile)) {
 			$config = include($configfile);
-		}
-		catch(Exception $e) {
-			throw new NotFoundException();
+
+			if(!is_array($config)) {
+				throw new ConfigException("Loading $configfile did not return an array. Maybe it's missing a return-statement?");
+			}
+
+			$config = Conferences::migrateTranslationConfiguration($config);
+			return new Conference($config, $mandator);
 		}
 
-		if(!is_array($config)) {
-			throw new ConfigException("Loading $configfile did not return an array. Maybe it's missing a return-statement?");
-		}
+		// otherwise try to find conference in c3data postgres
+		$query = 'query StreamingConfig($acronym: String!) {
+			conference(acronym: $acronym) {
+				title
+				acronym
+				description
+				keywords
+				organizer
+				startDate
+				endDate
+				streamingConfig 
+				
+				rooms(orderBy: [RANK_ASC, NAME_ASC], filter: {streamId: {isNull: false}}) {
+					nodes {
+						guid
+						name
+						slug
+						streamId
+						streamingConfig
+					}
+				}
+			}
+		}';
+		$data = query_data('conferenceConfig', $query, ['acronym' => $mandator]);
 
-		$config = Conferences::migrateTranslationConfiguration($config);
-
-		return $config;
+		return new ConferenceJson($data, $mandator);
 	}
 
 	public static function getConference($mandator) {
-		return new Conference(Conferences::loadConferenceConfig($mandator), $mandator);
+		return Conferences::loadConferenceConfig($mandator);
 	}
 
 	public static function hasCustomStyles($mandator) {

model/ModelJson.php

@@ -0,0 +1,50 @@
+<?php
+
+class ModelJson
+{
+	protected $config;
+	public function __construct($config)
+	{
+		$this->config = $config;
+	}
+
+	public function has($keychain)
+	{
+		return ModelJson::_has($this->config, $keychain);
+	}
+
+	public static function _has($array, $keychain)
+	{
+		if(!is_array($keychain))
+			$keychain = explode('.', $keychain);
+
+		$key = strtolower($keychain[0]);
+		if(!isset($array[$key]))
+			return false;
+
+		if(count($keychain) == 1)
+			return true;
+
+		return ModelJson::_has($array[$key], array_slice($keychain, 1));
+	}
+
+	public function get($keychain, $default = null)
+	{
+		return ModelJson::_get($this->config, $keychain, $default);
+	}
+
+	public static function _get($array, $keychain, $default)
+	{
+		if(!is_array($keychain))
+			$keychain = explode('.', $keychain);
+
+		$key = strtolower($keychain[0]);
+		if(!isset($array[$key]))
+			return $default;
+
+		if(count($keychain) == 1)
+			return $array[$key];
+
+		return ModelJson::_get($array[$key], array_slice($keychain, 1), $default);
+	}
+}