criticalmass: add

criticalmass/scrape.rb

@@ -0,0 +1,37 @@
+#!/usr/bin/env ruby
+
+require 'open-uri'
+require 'json'
+require 'erb'
+
+def scrape(year)
+  JSON.parse URI.open("https://criticalmass.in/api/ride?citySlug=dresden&year=#{year}")
+               .read()
+end
+
+def fmt_time(stamp)
+  Time.at(stamp)
+    .strftime "%Y%m%dT%H%M%S"
+end
+
+events = (scrape(Time.now.year) + scrape(Time.now.year + 1))
+
+ical = ERB::new <<~EOF
+  BEGIN:VCALENDAR
+  VERSION:2.0
+  METHOD:PUBLISH
+  X-WR-TIMEZONE;VALUE=TEXT:Europe/Berlin
+  <% events.each  do |ev| %>
+  BEGIN:VEVENT
+  SUMMARY:<%= ev['title'] %>
+  DTSTART:<%= fmt_time ev['date_time'] %>
+  DTEND:<%= fmt_time ev['date_time'] + 3600 * (ev['estimated_duration'] or 2) %>
+  UID:<%= ev['id'] %>@ciritcalmass.in
+  URL:https://criticalmass.in/dresden
+  LOCATION:<%= ev['location'] %>
+  GEO:<%= ev['latitude'] %>;<%= ev['longitude'] %>
+  END:VEVENT
+  <% end  %>
+  END:VCALENDAR
+EOF
+puts ical.result

default.nix

@@ -46,4 +46,5 @@ in {
   dresden-kulturstadt = wrapScript "dresden-kulturstadt" ./dresden-kulturstadt/scrape.rb;
   nabu = wrapScript "nabu" ./nabu/scrape.rb;
   museen-dresden = wrapScript "museen-dresden" ./museen-dresden/scrape.rb;
+  criticalmass = wrapScript "criticalmass" ./criticalmass/scrape.rb;
 }