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path: root/score.go
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package main

import (
	"encoding/gob"
	"fmt"
	"log"
	"os"
	"sort"
	"time"
)

const gobfile = `score.gob`

var score map[string]int

type Score struct {
	Nick    string
	Count   int
	Percent float64
}

type Scores []Score

func (s Scores) Len() int           { return len(s) }
func (s Scores) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
func (s Scores) Less(i, j int) bool { return s[i].Count < s[j].Count }

func NewScores(n int) (s Scores) {
	for k, v := range score {
		s = append(s, Score{
			Nick:  k,
			Count: v,
		})
	}
	sort.Sort(sort.Reverse(s))
	if n > 0 && len(s) > n {
		s = s[:n]
	}
	var total int
	for _, v := range s {
		total += v.Count
	}
	for i := range s {
		s[i].Percent = 100.0 * float64(s[i].Count) / float64(total)
	}
	return
}

func loadScore() map[string]int {
	m := make(map[string]int)
	fd, err := os.Open(gobfile)
	if err != nil {
		return m
	}
	defer fd.Close()
	decoder := gob.NewDecoder(fd)
	if err := decoder.Decode(&m); err != nil {
		log.Fatal(err)
	}
	return m
}

func saveScore(m map[string]int) {
	fd, err := os.Create(gobfile)
	if err != nil {
		log.Fatal(err)
	}
	defer fd.Close()
	encoder := gob.NewEncoder(fd)
	if err := encoder.Encode(m); err != nil {
		log.Fatal(err)
	}
}

func (s Score) String() string {
	return fmt.Sprintf("%v (%v/%.1f%%)", s.Nick, s.Count, s.Percent)
}

func (s Scores) String() (ret string) {
	for n, sc := range s {
		ret += fmt.Sprintf("%3d. %v", n+1, sc)
	}
	return
}

func init() {
	score = loadScore()
}

func Count(nick string) {
	score[nick]++
}

func AutoSave() {
	for {
		saveScore(score)
		time.Sleep(time.Minute)
	}
}