add matemat scraper

default.nix

@@ -26,4 +26,5 @@ in {
   xerox = wrapScript "xerox" ./xerox/scrape.rb;
   luftdaten = wrapScript "luftdaten" ./luftdaten/scrape.rb;
   fhem = wrapScript "fhem" ./fhem/scrape.rb;
+  matemat = wrapScript "matemat" ./matemat/scrape.rb;
 }

matemat/scrape.rb

@@ -0,0 +1,31 @@
+#!/usr/bin/env ruby
+
+require 'open-uri'
+require 'json'
+require 'influxdb'
+
+points = []
+
+data = JSON.parse open("http://matemat.hq.c3d2.de/statistics.json", :http_basic_authentication => ['k-ot', 'k-ot']).read()
+points.push({
+  series: 'statistics',
+  values: data,
+})
+
+data = JSON.parse open("http://matemat.hq.c3d2.de/summary.json", :http_basic_authentication => ['k-ot', 'k-ot']).read()
+data.each do |d|
+  points.push({
+    series: 'summary',
+    tags: {
+      name: d["name"],
+    },
+    values: {
+      price: d["price"],
+      value: d["value"],
+      volume: d["volume"],
+    }
+  })
+end
+
+db = InfluxDB::Client.new(url: "http://grafana.hq.c3d2.de:8086/matemat")
+db.write_points(points, 'm')