impl server side

src/server/game.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+type Game struct {
+	Pot     Currency
+	Players [16]Player
+}
+
+type Player struct {
+	ID      string
+	Name    string
+	Card    string
+	Balance Currency
+}
+
+type Currency int
+
+func (game Game) GetPlayers() []Player {
+	players := []Player{}
+	for _, player := range game.Players {
+		if !player.Empty() {
+			players = append(players, player)
+		}
+	}
+	return players
+}
+
+func (p Player) Empty() bool {
+	return p == (Player{})
+}
+
+func (c Currency) MarshalJSON() ([]byte, error) {
+	return json.Marshal(fmt.Sprintf(`$%v.%02d`, c/100, c%100))
+}
+
+func (c *Currency) UnmarshalJSON(b []byte) error {
+	var s string
+	if err := json.Unmarshal(b, &s); err != nil {
+		return err
+	}
+	re := regexp.MustCompile(`^\$([0-9]+(\.[0-9][0-9])?|\.[0-9]{2})$`)
+	if !re.MatchString(s) {
+		return fmt.Errorf("illegal currency format: %q", s)
+	}
+	s = strings.TrimPrefix(s, "$")
+	dollars := strings.Split(s, ".")[0]
+	cents := strings.TrimPrefix(s, dollars+".")
+	if !strings.HasPrefix(s, dollars+".") {
+		cents = "0"
+	}
+	if dollars == "" {
+		dollars = "0"
+	}
+	if cents == "00" {
+		cents = "0"
+	}
+	dI, err := strconv.Atoi(dollars)
+	if err != nil {
+		return err
+	}
+	cI, err := strconv.Atoi(cents)
+	if err != nil {
+		return err
+	}
+	c2 := Currency(dI*100 + cI)
+	*c = c2
+	return nil
+}