Fixed bug related to missing DTSTART property

composer.json

@@ -1,49 +1,40 @@
 {
-    "name": "johngrogg/ics-parser",
-    "description": "ICS Parser",
-    "homepage": "https://github.com/u01jmg3/ics-parser",
-    "keywords": [
-        "ical",
-        "ical-parser",
-        "icalendar",
-        "ics",
-        "ics-parser",
-        "ifb"
-    ],
-    "type": "library",
-    "license": "MIT",
-    "authors": [
-        {
-            "name": "Jonathan Goode",
-            "role": "Developer/Owner"
-        },
-        {
-            "name": "John Grogg",
-            "email": "[email protected]",
-            "role": "Developer/Prior Owner"
-        }
-    ],
-    "funding": [
-        {
-            "type": "github",
-            "url": "https://github.com/sponsors/u01jmg3"
-        }
-    ],
-    "require": {
-        "php": ">=5.6.40",
-        "ext-mbstring": "*"
+  "name": "abdulsametsahin/ics-parser",
+  "description": "ICS Parser",
+  "homepage": "https://github.com/u01jmg3/ics-parser",
+  "keywords": ["ical", "ical-parser", "icalendar", "ics", "ics-parser", "ifb"],
+  "type": "library",
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Jonathan Goode",
+      "role": "Developer/Owner"
     },
-    "require-dev": {
-        "phpunit/phpunit": "^5|^9|^10"
-    },
-    "autoload": {
-        "psr-0": {
-            "ICal": "src/"
-        }
-    },
-    "scripts": {
-        "test": [
-            "phpunit --colors=always"
-        ]
+    {
+      "name": "John Grogg",
+      "email": "[email protected]",
+      "role": "Developer/Prior Owner"
+    }
+  ],
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/u01jmg3"
+    }
+  ],
+  "require": {
+    "php": ">=5.6.40",
+    "ext-mbstring": "*"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^5|^9|^10"
+  },
+  "autoload": {
+    "psr-0": {
+      "ICal": "src/"
     }
+  },
+  "scripts": {
+    "test": ["phpunit --colors=always"]
+  }
 }

src/ICal/ICal.php

@@ -199,6 +199,13 @@ class ICal
      */
     protected $httpProtocolVersion;
 
+    /**
+     * Toggles whether to ignore incomplete events
+     *
+     * @var boolean
+     */
+    protected $ignoreIncompleteEvents = false;
+
     /**
      * Define which variables can be configured
      *
@@ -213,6 +220,7 @@ class ICal
         'filterDaysBefore',
         'httpUserAgent',
         'skipRecurrence',
+        'ignoreIncompleteEvents'
     );
 
     /**
@@ -1283,6 +1291,11 @@ protected function processEvents()
 
         if ($events !== array()) {
             foreach ($events as $key => $anEvent) {
+                if ($this->ignoreIncompleteEvents && !$this->hasAllRequiredFields($anEvent)) {
+                    unset($events[$key]);
+                    continue;
+                }
+
                 foreach (array('DTSTART', 'DTEND', 'RECURRENCE-ID') as $type) {
                     if (isset($anEvent[$type])) {
                         $date = $anEvent["{$type}_array"][1];
@@ -2728,4 +2741,17 @@ public function timeZoneStringToDateTimeZone($timeZoneString)
 
         return new \DateTimeZone($this->getDefaultTimeZone());
     }
+
+    public function hasAllRequiredFields($event)
+    {
+        $requiredFields = ['UID', 'DTSTAMP', 'DTSTART'];
+
+        foreach ($requiredFields as $field) {
+            if (!isset($event[$field])) {
+                return false;
+            }
+        }
+
+        return true;
+    }
 }