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main.go
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main.go
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package main
import (
"bufio"
"fmt"
"io"
"os"
"sort"
"text/tabwriter"
"github.com/avct/uasurfer"
)
func main() {
var count int
ua := &uasurfer.UserAgent{}
stats := stats{
BrowserNames: make(map[uasurfer.BrowserName]int),
OSNames: make(map[uasurfer.OSName]int),
DeviceTypes: make(map[uasurfer.DeviceType]int),
}
scanner := bufio.NewScanner(os.Stdin)
for scanner.Scan() {
count++
ua.Reset()
uasurfer.ParseUserAgent(scanner.Text(), ua)
stats.BrowserNames[ua.Browser.Name]++
stats.OSNames[ua.OS.Name]++
stats.DeviceTypes[ua.DeviceType]++
}
if err := scanner.Err(); err != nil {
fmt.Fprintln(os.Stderr, "reading standard input:", err)
}
fmt.Printf("Read %d useragents\n", count)
fmt.Println()
stats.Summary(count, os.Stdout)
}
type stats struct {
OSNames map[uasurfer.OSName]int
BrowserNames map[uasurfer.BrowserName]int
DeviceTypes map[uasurfer.DeviceType]int
}
func (s *stats) Summary(total int, dest io.Writer) {
browserCounts := make([]stringCount, 0, len(s.BrowserNames))
for k, v := range s.BrowserNames {
browserCounts = append(browserCounts, stringCount{name: k.String(), count: v})
}
sort.Slice(browserCounts, func(i, j int) bool { return browserCounts[j].count < browserCounts[i].count }) // by count reversed
fmt.Fprintf(dest, "Browsers\n")
err := writeTable(browserCounts, total, dest)
if err != nil {
fmt.Fprintf(os.Stderr, "writing summary: %v", err)
return
}
fmt.Fprintln(dest)
osCounts := make([]stringCount, 0, len(s.OSNames))
for k, v := range s.OSNames {
osCounts = append(osCounts, stringCount{name: k.String(), count: v})
}
sort.Slice(osCounts, func(i, j int) bool { return osCounts[j].count < osCounts[i].count }) // by count reversed
fmt.Fprintf(dest, "Operating Systems\n")
err = writeTable(osCounts, total, dest)
if err != nil {
fmt.Fprintf(os.Stderr, "writing summary: %v", err)
return
}
fmt.Fprintln(dest)
deviceCounts := make([]stringCount, 0, len(s.DeviceTypes))
for k, v := range s.DeviceTypes {
deviceCounts = append(deviceCounts, stringCount{name: k.String(), count: v})
}
sort.Slice(deviceCounts, func(i, j int) bool { return deviceCounts[j].count < deviceCounts[i].count }) // by count reversed
fmt.Fprintf(dest, "Device Types\n")
err = writeTable(deviceCounts, total, dest)
if err != nil {
fmt.Fprintf(os.Stderr, "writing summary: %v", err)
return
}
}
func writeTable(counts []stringCount, total int, dest io.Writer) error {
tw := tabwriter.NewWriter(dest, 10, 1, 2, ' ', 0)
for i := range counts {
fmt.Fprintf(tw, "%s\t%d (%.2f%%)\n", counts[i].name, counts[i].count, percent(counts[i].count, total))
}
return tw.Flush()
}
type stringCount struct {
name string
count int
}
func percent(num, den int) float64 {
return float64(num) / float64(den) * 100.0
}