Snippets

J Post Zwift Events calendar ical generator in PHP

Updated by J Post
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File events.php Modified

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 <?php
 // This script grabs the events from zwift.com/events and makes them available in ical form so you can use them in your calendar
-// Disclaimer: This is  script created for myself to use in my calendar, and is NOT supported or related to Zwift in any way
+// Disclaimer: This is  script created for myself to use in my calendar, and is NOT supported by or related to Zwift in any way
 
 class zwift_ics{
Created by J Post
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File events.php Added

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+<?php
+// This script grabs the events from zwift.com/events and makes them available in ical form so you can use them in your calendar
+// Disclaimer: This is  script created for myself to use in my calendar, and is NOT supported or related to Zwift in any way
+
+class zwift_ics{
+
+    private $url = "http://zwift.com/json/events";
+    private $cachefile = "cache.txt";
+    private $cachetime = "600";
+    private $output = FALSE;
+
+
+    function run(){
+        header('Content-type: text/calendar; charset=utf-8');
+        header('Content-Disposition: attachment; filename=zwift_events.ics');
+
+        // Try to get the data from cache
+        $this->output = $this->get_cache();
+
+        // No data, query zwift
+        if($this->output === FALSE){
+            $data = $this->get_data_from_zwift();
+            if($data !== FALSE){
+                $this->create_output($data);
+            }else{
+                throw new Exception("Sorry, I wasn't able to grab the latest data from Zwift");
+            }
+            $this->set_cache($this->output);
+        }
+
+        // Print everything and exit
+        exit($this->output);
+    }
+
+    function create_output($data){
+        $data = json_decode($data);
+        if(!is_array($data)){
+            throw new Exception("Retrieved data incorrect");
+        }
+        $this->output = $this->header();
+
+        foreach($data as $id => $event){
+            $this->output .= $this->event($event);
+        }
+
+        $this->output .= $this->footer();
+
+        return $this->output;
+    }
+
+    function get_cache(){
+        if(!file_exists($this->cachefile)){
+            file_put_contents($this->cachefile, "");
+        }
+        $cache = file_get_contents($this->cachefile);
+
+        // If the file is empty
+        if(strlen($cache) < 100){
+            return FALSE;
+        }
+
+        // if it is modified longer than given time ago
+        if((filemtime($this->cachefile) + $this->cachetime) < time()){
+            return FALSE;
+        }
+
+        return $cache;
+    }
+
+    function set_cache($data){
+        file_put_contents($this->cachefile, $data);
+    }
+
+    function get_data_from_zwift(){
+        return file_get_contents($this->url);
+    }
+
+
+    function dateToCal($timestamp) {
+        return date('Ymd\THis\Z', $timestamp);
+    }
+
+    function escapeString($string) {
+        $string = str_replace("\n", "\\n", $string);
+        return preg_replace('/([\,;])/','\\\$1', $string);
+    }
+
+    function header(){
+        return "BEGIN:VCALENDAR\n" .
+                "VERSION:2.0\n" .
+                "METHOD:PUBLISH\n" .
+                "PRODID:-//onlinephpfunctions.com//zwift 1.0//EN\n";
+    }
+
+    function event($event){
+        return "BEGIN:VEVENT" .
+        "\nDESCRIPTION:" . $this->escapeString($event->description) .
+                "\nDTEND:" . $this->dateToCal($event->start + $event->durationInSeconds) .
+                "\nDTSTAMP:" . $this->dateToCal($event->start) .
+                "\nDTSTART:" . $this->dateToCal($event->start) .
+                "\nSEQUENCE:0" .
+                "\nLOCATION:" . $this->escapeString($event->route) .
+                "\nSUMMARY:" . $this->escapeString($event->name) . // Go to Zwift.com/events for full details"  // . $this->escapeString($event->description) . "
+                "\nUID:" . uniqid() .
+                "\nEND:VEVENT\n";
+    }
+
+    function  footer(){
+        return "\nEND:VCALENDAR\n";
+    }
+
+}
+
+$zwift_events = new zwift_ics();
+$zwift_events->run();
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