init

caldav.php

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+<?php
+if (!defined('INCLUDE_DIR')) die('Fatal error');
+
+class CaldavPlugin extends Plugin {
+    public $config_class = 'CaldavConfig';
+
+    public function getConfigurationForm() {
+        return array(
+            'calendar_url' => new TextboxField(array(
+                'label' => 'Calendar URL',
+                'configuration' => array(
+                    'size' => 60,
+                    'length' => 255
+                ),
+                'required' => true
+            )),
+            'app_token' => new TextboxField(array(
+                'label' => 'App Token',
+                'configuration' => array(
+                    'size' => 60,
+                    'length' => 255
+                ),
+                'required' => true,
+                'widget' => 'Password'
+            )),
+        );
+    }
+
+    public function getAgentActions() {
+        return array(
+            'create_calendar_entry' => array(
+                'label' => 'Create Calendar Entry',
+                'action' => 'createCalendarEntry'
+            )
+        );
+    }
+
+    public function createCalendarEntry($ticket) {
+        // Implementation will go here
+    }
+}
+
+class CaldavConfig extends PluginConfig {
+    public function getOptions() {
+        return array(
+            'calendar_url' => $this->getConfig('calendar_url'),
+            'app_token' => $this->getConfig('app_token')
+        );
+    }
+
+    public function pre_save($config, &$errors) {
+        if (!$config['calendar_url']) {
+            $errors['calendar_url'] = 'Calendar URL is required';
+        }
+        if (!$config['app_token']) {
+            $errors['app_token'] = 'App Token is required';
+        }
+        return true;
+    }
+}
+?>

hooks.php

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+<?php
+// Hook into osTicket events
+class CaldavHooks {
+    
+    static function onTicketCreated($ticket) {
+        // Trigger calendar entry creation when ticket is created
+        $config = Plugin::getConfig('caldav');
+        if ($config && $config['calendar_url'] && $config['app_token']) {
+            self::createCalendarEntry($ticket, $config);
+        }
+    }
+
+    static function createCalendarEntry($ticket, $config) {
+        // Your CalDAV implementation here
+        $url = $config['calendar_url'];
+        $token = $config['app_token'];
+        
+        // Example using cURL for CalDAV operations:
+        $icalData = self::generateIcalEvent($ticket);
+        
+        $ch = curl_init();
+        curl_setopt($ch, CURLOPT_URL, $url);
+        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
+        curl_setopt($ch, CURLOPT_POSTFIELDS, $icalData);
+        curl_setopt($ch, CURLOPT_HTTPHEADER, [
+            'Content-Type: text/calendar',
+            'Authorization: Bearer ' . $token
+        ]);
+        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+        
+        $response = curl_exec($ch);
+        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        curl_close($ch);
+        
+        // Handle response (log errors, etc.)
+        if ($httpCode >= 200 && $httpCode < 300) {
+            // Success
+        } else {
+            // Log error
+            error_log("CalDAV Error: " . $response);
+        }
+    }
+
+    static function generateIcalEvent($ticket) {
+        $summary = 'Ticket #' . $ticket->getNumber();
+        $description = $ticket->getSubject();
+        
+        return "BEGIN:VCALENDAR\n" .
+               "VERSION:2.0\n" .
+               "PRODID:-//osTicket CalDAV Plugin\n" .
+               "BEGIN:VEVENT\n" .
+               "UID:" . uniqid() . "@osticket.com\n" .
+               "DTSTAMP:" . date('Ymd\THis\Z') . "\n" .
+               "DTSTART:" . date('Ymd\THis\Z') . "\n" .
+               "SUMMARY:" . $summary . "\n" .
+               "DESCRIPTION:" . $description . "\n" .
+               "END:VEVENT\n" .
+               "END:VCALENDAR";
+    }
+}
+?>

plugin.php.disabled

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+<?php
+return array(
+    'id' => 'caldav',
+    'name' => 'CalDAV Integration',
+    'version' => '1.0',
+    'author' => 'Your Name',
+    'description' => 'Integrate with external CalDAV servers for creating calendar entries',
+    'url' => 'https://yourdomain.com',
+    'plugin' => 'caldav.php:CaldavPlugin'
+);
+?>