feat: add total player count and total playtime logic

- Implemented TotalPlayerCountLogic to retrieve the total number of unique players within a specified time range.
- Implemented TotalPlayTimeLogic to calculate the total playtime of players within a specified time range.
- Created ServiceContext to manage database connections and initialize necessary tables.
- Added types for total player count and total playtime requests and responses.
- Set up the main server file to start the application with the necessary configurations.
- Updated go.mod and go.sum for new dependencies.

app/internal/logic/serverlistlogic.go

@@ -0,0 +1,64 @@
+package logic
+
+import (
+	"context"
+
+	"git.cialloo.com/CiallooWeb/ServerStatistics/app/internal/svc"
+	"git.cialloo.com/CiallooWeb/ServerStatistics/app/internal/types"
+
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+type ServerListLogic struct {
+	logx.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+// Get the list of monitored game servers
+func NewServerListLogic(ctx context.Context, svcCtx *svc.ServiceContext) *ServerListLogic {
+	return &ServerListLogic{
+		Logger: logx.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *ServerListLogic) ServerList(req *types.ServerListReq) (resp []types.ServerListResp, err error) {
+	// Query to select all servers from the database
+	query := `SELECT name, ip, port, category, bot_count, human_count, mapname FROM server ORDER BY id`
+
+	rows, err := l.svcCtx.DB.Query(query)
+	if err != nil {
+		l.Logger.Errorf("Failed to query servers: %v", err)
+		return nil, err
+	}
+	defer rows.Close()
+
+	// Iterate through the results and build the response
+	for rows.Next() {
+		var server types.ServerListResp
+		err = rows.Scan(
+			&server.ServerName,
+			&server.ServerIP,
+			&server.ServerPort,
+			&server.Category,
+			&server.BotCount,
+			&server.HumanCount,
+			&server.MapName,
+		)
+		if err != nil {
+			l.Logger.Errorf("Failed to scan server row: %v", err)
+			return nil, err
+		}
+		resp = append(resp, server)
+	}
+
+	// Check for any error that occurred during iteration
+	if err = rows.Err(); err != nil {
+		l.Logger.Errorf("Error iterating through server rows: %v", err)
+		return nil, err
+	}
+
+	return resp, nil
+}