render event content into event description as plain text

Gemfile

@@ -1,3 +1,4 @@
 source "https://rubygems.org"
 gemspec
 gem 'icalendar'
+gem 'redcarpet'

_plugins/events_to_ics.rb

@@ -1,4 +1,6 @@
 require 'icalendar'
+require 'redcarpet'
+require 'redcarpet/render_strip' 
 
 module Jekyll
   class IcsGenerator < Generator
@@ -7,17 +9,32 @@ module Jekyll
 
     def generate(site)
       events = site.collections['events'].docs
+      organizer = "Netz39 Team <kontakt@netz39.de>"
+      location = "Netz39 e.V., Leibnizstraße 32, 39104 Magdeburg"
 
       cal = Icalendar::Calendar.new
 
       events.each do |event|
         title = event.data['title']
         date = event.data['event_date']
-        event = Icalendar::Event.new
-        event.dtstart = date
-        event.dtend = date
-        event.summary = title
-        cal.add_event(event)
+
+        # Remove image URLs from description
+        content = event.content
+        content.gsub!(/\!\[.*?\]\((.*?)\)/, '')
+
+        # Render Markdown content to plain text
+        markdown_parser = Redcarpet::Markdown.new(Redcarpet::Render::StripDown)
+        description = markdown_parser.render(content)
+
+        # Create new event and set its properties
+        ical_event = Icalendar::Event.new
+        ical_event.dtstart = Icalendar::Values::Date.new(date)
+        ical_event.dtend = Icalendar::Values::Date.new(date)
+        ical_event.summary = title
+        ical_event.description = description
+        ical_event.organizer = organizer
+        ical_event.location = location
+        cal.add_event(ical_event)
       end
       site.pages << IcalPage.new(site, site.source, 'feed/eo-events', "events.ics", cal)