feat: the dashboard page is ready for admin console

api/handler/admin/dashboard_handler.go

@@ -0,0 +1,55 @@
+package admin
+
+import (
+	"chatplus/core"
+	"chatplus/handler"
+	"chatplus/store/model"
+	"chatplus/utils/resp"
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+	"time"
+)
+
+type DashboardHandler struct {
+	handler.BaseHandler
+	db *gorm.DB
+}
+
+func NewDashboardHandler(app *core.AppServer, db *gorm.DB) *DashboardHandler {
+	h := DashboardHandler{db: db}
+	h.App = app
+	return &h
+}
+
+type statsVo struct {
+	Users  int64 `json:"users"`
+	Chats  int64 `json:"chats"`
+	Tokens int64 `json:"tokens"`
+}
+
+func (h *DashboardHandler) Stats(c *gin.Context) {
+	stats := statsVo{}
+	// new users statistic
+	var userCount int64
+	now := time.Now()
+	zeroTime := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, now.Location())
+	res := h.db.Model(&model.User{}).Where("created_at > ?", zeroTime).Count(&userCount)
+	if res.Error == nil {
+		stats.Users = userCount
+	}
+
+	// new chats statistic
+	var chatCount int64
+	res = h.db.Model(&model.ChatItem{}).Where("created_at > ?", zeroTime).Count(&chatCount)
+	if res.Error == nil {
+		stats.Chats = chatCount
+	}
+
+	// tokens took stats
+	var tokenCount int64
+	res = h.db.Model(&model.HistoryMessage{}).Select("sum(tokens) as tokens_total").Where("created_at > ?", zeroTime).Scan(&tokenCount)
+	if res.Error == nil {
+		stats.Tokens = tokenCount
+	}
+	resp.SUCCESS(c, stats)
+}