feat(login):基本完成用户登录，待测。

controller/user.go

@@ -0,0 +1,52 @@
+package controller
+
+import (
+	"electricity_bill_calc/exceptions"
+	"electricity_bill_calc/model"
+	"electricity_bill_calc/response"
+	"electricity_bill_calc/service"
+	"errors"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+type _UserController struct{}
+
+var UserController _UserController
+
+type LoginFormData struct {
+	Username string `form:"uname"`
+	Password string `form:"upass"`
+	Type     int8   `form:"type"`
+}
+
+func (_UserController) Login(c *gin.Context) {
+	result := response.NewResult(c)
+	loginData := new(LoginFormData)
+	c.BindJSON(loginData)
+	var (
+		session *model.Session
+		err     error
+	)
+	if loginData.Type == 0 {
+		session, err = service.UserService.ProcessEnterpriseUserLogin(loginData.Username, loginData.Password)
+	} else {
+		session, err = service.UserService.ProcessManagementUserLogin(loginData.Username, loginData.Password)
+	}
+	if err != nil {
+		if errors.Is(err, &exceptions.AuthenticationError{}) {
+			authError := err.(exceptions.AuthenticationError)
+			if authError.NeedReset {
+				result.LoginNeedReset()
+				return
+			}
+			result.Error(int(authError.Code), authError.Message)
+			return
+		} else {
+			result.Error(http.StatusInternalServerError, err.Error())
+			return
+		}
+	}
+	result.LoginSuccess(session, false)
+}