Initial commit.

Example output:
Got 580 offers. Filtered offers: 3
           ID|     Ram|             HDD|                           CPU|    Price|   Score|  Reduce time|Specials
  SB57-931121|  128 GB|  2x 2 TB (4096)|  Intel Xeon E5-1650V2 (12518)|  57.00 €|  103.12|      53h 53m|ECC, Ent. HDD, iNIC
  SB69-927780|  128 GB|  2x 2 TB (4096)|  Intel Xeon E5-1650V3 (13335)|  69.00 €|   89.92|      49h 39m|ECC, Ent. HDD, iNIC
  SB76-910394|  128 GB|  3x 2 TB (6144)|  Intel Xeon E5-1650V2 (12518)|  76.00 €|   82.73|      01h 21m|ECC, Ent. HDD, iNIC

crawler/crawler.go

@@ -0,0 +1,84 @@
+package crawler
+
+import (
+	"fmt"
+	"github.com/mrahbar/my-bloody-hetzner-sb-notifier/hetzner"
+	"os"
+	"sort"
+	"text/tabwriter"
+)
+
+type Crawler struct {
+	tabWriter *tabwriter.Writer
+
+	minPrice float64
+	maxPrice float64
+
+	minRam int
+	maxRam int
+
+	minHddSize int
+	maxHddSize int
+
+	minHddCount int
+	maxHddCount int
+
+	minBenchmark int
+	maxBenchmark int
+}
+
+func NewCrawler(minPrice float64, maxPrice float64, minRam int, maxRam int, minHddSize int, maxHddSize int, minHddCount int, maxHddCount int, minBenchmark int, maxBenchmark int) *Crawler {
+	crawler := &Crawler{
+		tabwriter.NewWriter(os.Stdout, 0, 8, 2, ' ', tabwriter.Debug|tabwriter.AlignRight),
+		minPrice,
+		maxPrice,
+		minRam,
+		maxRam,
+		minHddSize,
+		maxHddSize,
+		minHddCount,
+		maxHddCount,
+		minBenchmark,
+		maxBenchmark,
+	}
+
+	return crawler
+}
+
+func (c *Crawler) Filter(servers []hetzner.Server) []hetzner.Server {
+	var filteredServers []hetzner.Server
+	for _, server := range servers {
+		if !c.isFiltered(server) {
+			filteredServers = append(filteredServers, server)
+		}
+	}
+
+	sort.Slice(servers, func(i, j int) bool {
+		return servers[i].Score() > servers[j].Score()
+	})
+	return filteredServers
+}
+
+func (c *Crawler) Print(servers []hetzner.Server) {
+	fmt.Fprintf(c.tabWriter, "%s\n", servers[0].Header())
+	for _, server := range servers {
+		fmt.Fprintf(c.tabWriter, "%s\n", server.ToString())
+	}
+	c.tabWriter.Flush()
+}
+
+
+func (c *Crawler) isFiltered(server hetzner.Server) bool {
+	filtered := true
+
+	priceParsed := server.ParsePrice()
+	if server.Cpu_benchmark >= c.minBenchmark && server.Cpu_benchmark <= c.maxBenchmark &&
+		priceParsed >= c.minPrice && priceParsed <= c.maxPrice &&
+		server.Ram >= c.minRam && server.Ram <= c.maxRam &&
+		server.TotalHdd() >= c.minHddSize && server.TotalHdd() <= c.maxHddSize &&
+		server.Hdd_count >= c.minHddCount && server.Hdd_count <= c.maxHddCount {
+		filtered = false
+	}
+
+	return filtered
+}