aufnahmekh.php

<?php
	/**
	* aufnahmekh-json
	*
	* Gets the reception hospital in Linz from a public listing and formats it machine readable.
	*
	* @copyright  Copyright (c) 2019 Matthias Schaffer (https://matthiasschaffer.com)
	* @license    https://spdx.org/licenses/MIT.html   MIT License
	* @link       https://github.com/fellwell5/aufnahmekh-json
	*/
	
	//ini_set('display_errors', 1);
	
	/**
	 * URL-PARAMETER
	 * Show only hospitals for the given date
	 *
	 * @param date $_GET["date"] e.g. 2019-09-28 or 28.09.2019
	 */ 
	/**
	 * URL-PARAMETER
	 * Forces the script to reload the cached json file. Normally it is reloaded once per day.
	 *
	 * @param boolean $_GET["nocache"] can be empty, e.g. ?nocache&date=xxx
	 */
	
	if(isset($_GET["date"])){
		$getbydate = strtotime($_GET["date"]);
		/**
		 * If the date can't be converted to a timestampt, the script throws an error message and exits with http error 400.
		 */
		if(!$getbydate){
			http_response_code(400);
			exit($_GET["date"]." seems to be not a valid date.<br>The date should be formatted like this 2019-09-28 or 28.09.2019.");
		}
	}
	
	/**
	 * If the cache file "aufnahmekh.json" doesn't exist, is not from this day or the nocache parameter was set:
	 * The file will be generated newly.
	 */
	if(!file_exists("aufnahmekh.json") || date("d.m.Y", filemtime("aufnahmekh.json")) != date("d.m.Y") || isset($_GET["nocache"])){
		@unlink("aufnahmekh.json");
		
		/**
		 * The webpage from the austrian red cross gets loaded and the data from the selected div (via class selector) is loaded.
		 */
		$DOM = new DOMDocument();
		@$DOM->loadHTMLFile("https://www.roteskreuz.at/ooe/dienststellen/perg/ichbrauchehilfe/aufnahmekrankenhaus/linz/");
		
		$finder = new DomXPath($DOM);
		$nodes = $finder->query("//div[contains(@class, 'tx-lumophpinclude-pi1')]/div");
		
		$long2short = array("Barmherzige Brüder Linz" => "BHB", "Elisabethinen Linz - Ordensklinikum" => "ELIS", "Barmherzige Schwestern Linz - Ordensklinikum" => "BHS");
		$Notdienste = array();
		
		/**
		 * We loop through the divs in the main div.
		 * The data is loaded from the child nodes of the event div.
		 */
		foreach($nodes as $sNodeDetail){
			$from_text = $sNodeDetail->childNodes->item(0)->childNodes->item(0)->nodeValue;
			$from_date = substr($from_text, 9, 6).date("Y")." ".substr($from_text, 16, 5);
			$to_text = $sNodeDetail->childNodes->item(0)->childNodes->item(2)->nodeValue;
			$to_date = substr($to_text, 9, 6).date("Y")." ".substr($to_text, 16, 5);
			$from = strtotime($from_date);
			$to = strtotime($to_date);
			if($from > $to){
				/**
				 * If the from timestamp is bigger than the to timestamp, the year changed over the night.
				 * So we add one year to the to timestamp.
				 */
				$to_date = substr($to_text, 9, 6).(date("Y")+1)." ".substr($to_text, 16, 5);
				$to = strtotime($to_date);
			}
			
			$name = $sNodeDetail->childNodes->item(1)->childNodes->item(0)->nodeValue;
			$address = $sNodeDetail->childNodes->item(1)->childNodes->item(3)->nodeValue;
			$contact = str_replace("\r\n", "", $sNodeDetail->childNodes->item(1)->childNodes->item(6)->nodeValue);
			
			$Notdienste[] = array(
				"from_ts" => $from,
				"from_date" => $from_date,
				"to_ts" => $to,
				"to_date" => $to_date,
				"name" => $name,
				"short_name" => (array_key_exists($name, $long2short)) ? $long2short[$name] : $name,
				"address" => $address,
				"contact" => $contact
			);
		}
		$json = json_encode($Notdienste);
		file_put_contents("aufnahmekh.json", $json);
	}else{
		/**
		 * Use cached version
		 */
		$json = file_get_contents("aufnahmekh.json");
	}
	
	
	/**
	 * Show only the hospitals for the given date
	 */
	if(isset($_GET["date"])){
		$Notdienste = array();
		$json = json_decode($json, true);
		foreach($json as &$item){
			if(date("z-Y", $getbydate) != date("z-Y", $item["from_ts"])) continue;
			$Notdienste[] = $item;
		}
		$json = json_encode($Notdienste);
	}
	
	header("Content-Type: application/json");
	echo $json;