From 097c0437f2752dc535f91bb0d83510e1d529b6b0 Mon Sep 17 00:00:00 2001
From: Astro <astro@spaceboyz.net>
Date: Fri, 12 Nov 2021 00:07:28 +0100
Subject: [PATCH] drk-impfaktionen: init

---
 default.nix                |  1 +
 drk-impfaktionen/scrape.rb | 93 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 94 insertions(+)
 create mode 100644 drk-impfaktionen/scrape.rb

diff --git a/default.nix b/default.nix
index 41d3d90..d6fd300 100644
--- a/default.nix
+++ b/default.nix
@@ -34,4 +34,5 @@ in {
   kreuzchor-termine = wrapScript "kreuzchor-termine" ./kreuzchor-termine/scrape.rb;
   dhmd-veranstaltungen = wrapScript "dhmd-veranstaltungen" ./dhmd-veranstaltungen/scrape.rb;
   mkz-programm = wrapScript "mkz-programm" ./mkz-programm/scrape.rb;
+  drk-impfaktionen = wrapScript "drk-impfaktionen" ./drk-impfaktionen/scrape.rb;
 }
diff --git a/drk-impfaktionen/scrape.rb b/drk-impfaktionen/scrape.rb
new file mode 100644
index 0000000..c300e33
--- /dev/null
+++ b/drk-impfaktionen/scrape.rb
@@ -0,0 +1,93 @@
+#!/usr/bin/env ruby
+# coding: utf-8
+
+require 'open-uri'
+require 'nokogiri'
+require 'erb'
+
+def find_day s
+  if s =~ /(\d+)\.(\d+)\./
+    day = $1.to_i
+    month = $2.to_i
+    result = Time.now - 3 * 30 * 86400
+    while result.year < 2100
+      if result.month == month && result.day == day
+        return result
+      end
+      result += 86400
+    end
+    STDERR.puts "Invalid day #{s.inspect}"
+    nil
+  else
+    # STDERR.puts "Cannot parse day #{s.inspect}"
+    nil
+  end
+end
+
+def fmt_time t
+  t.strftime "%Y%m%dT%H%M%S"
+end
+
+class Event
+  attr_accessor :start, :stop, :location
+
+  def initialize start, stop, location
+    @start = start
+    @stop = stop
+    @location = location
+  end
+end
+
+events = []
+day = nil
+
+url = "https://drksachsen.de/impfaktionen.html"
+doc = Nokogiri::HTML URI.open(url)
+doc.css(".o-accordion__navigation").each do |section|
+  region = section.css(".o-accordion__title-wrap").text
+  if region =~ /Dresden/
+    section.css(".o-media__body").each do |list|
+      list.children.each do |child|
+        case child.name
+        when "p"
+          day = find_day child.text
+        when "ul"
+          child.css("li").each do |item|
+            if day && item.text =~ /Impf\-?aktion[\s\u00A0]+(.+Dresden),?[\s\u00A0]*(\d+)[:\.]?(\d*)[\s\u00A0]*[\-bis]{1,3}[\s\u00A0]*(\d+)[:\.]?(\d*)/i
+              start = Time.new day.year, day.month, day.day, $2.to_i, $3.to_i
+              stop = Time.new day.year, day.month, day.day, $4.to_i, $5.to_i
+              raise "Stuff is really broken" if start.hour == 0 || stop.hour == 0
+              events << Event.new(start, stop, $1)
+            elsif day
+              STDERR.puts "Text not recognized: #{item.text.inspect}"
+            else
+              STDERR.puts "No day!"
+            end
+          end
+        end
+      end
+    end
+  end
+end  
+
+ical = ERB::new <<~EOF
+  BEGIN:VCALENDAR
+  VERSION:2.0
+  METHOD:PUBLISH
+  X-WR-TIMEZONE;VALUE=TEXT:Europe/Berlin
+  <% events.each_with_index do |ev, i| %>
+  BEGIN:VEVENT
+  METHOD:PUBLISH
+  CLASS:PUBLIC
+  UID:<%= url %>#<%= i %>
+  DTSTART:<%= fmt_time ev.start %>
+  DTEND:<%= fmt_time ev.stop %>
+  SUMMARY:Vor-Ort-Impfaktion
+  URL:<%= url %>
+  LOCATION:<%= ev.location %>
+  END:VEVENT
+  <% end %>
+  END:VCALENDAR
+EOF
+
+puts ical.result