update caching and server creation

local/model/state_history_stats.go

@@ -0,0 +1,38 @@
+package model
+
+import "time"
+
+type SessionCount struct {
+	Name  string `json:"name"`
+	Count int    `json:"count"`
+}
+
+type DailyActivity struct {
+	Date          time.Time `json:"date"`
+	SessionsCount int       `json:"sessionsCount"`
+}
+
+type PlayerCountPoint struct {
+	Timestamp time.Time `json:"timestamp"`
+	Count     int       `json:"count"`
+}
+
+type StateHistoryStats struct {
+	AveragePlayers      float64           `json:"averagePlayers"`
+	PeakPlayers         int               `json:"peakPlayers"`
+	TotalSessions       int               `json:"totalSessions"`
+	TotalPlaytime       int               `json:"totalPlaytime"` // in minutes
+	PlayerCountOverTime []PlayerCountPoint `json:"playerCountOverTime"`
+	SessionTypes        []SessionCount     `json:"sessionTypes"`
+	DailyActivity       []DailyActivity    `json:"dailyActivity"`
+	RecentSessions      []RecentSession    `json:"recentSessions"`
+} 
+
+type RecentSession struct {
+	ID       uint      `json:"id"`
+	Date     time.Time `json:"date"`
+	Type     string    `json:"type"`
+	Track    string    `json:"track"`
+	Duration int       `json:"duration"`
+	Players  int       `json:"players"`
+}