feat(user):基本完成用户重设密码，待测。

service/user.go

@@ -5,8 +5,10 @@ import (
 	"electricity_bill_calc/cache"
 	"electricity_bill_calc/config"
 	"electricity_bill_calc/exceptions"
+	"electricity_bill_calc/global"
 	"electricity_bill_calc/model"
 	"electricity_bill_calc/repository"
+	"electricity_bill_calc/utils"
 	"fmt"
 	"time"
 
@@ -92,3 +94,64 @@ func (_UserService) ProcessManagementUserLogin(username, password string) (*mode
 	cache.CacheSession(session)
 	return session, nil
 }
+
+func (_UserService) InvalidUserPassword(uid string) (string, error) {
+	user, err := repository.UserRepo.FindUserByID(uid)
+	if user == nil && err != nil {
+		return "", exceptions.NewNotFoundError("指定的用户不存在。")
+	}
+	verifyCode := utils.RandStr(10)
+	hash := sha512.New512_256()
+	hash.Write([]byte(verifyCode))
+	user.Password = string(hash.Sum(nil))
+	user.ResetNeeded = true
+	affected, err := global.DBConn.ID(uid).Cols("password", "reset_needed").Update(user)
+	if err != nil {
+		return "", err
+	}
+	if affected > 0 {
+		// ! 同一个用户在缓存中有两个键。
+		cache.AbolishCacheData("user", user.Id)
+		cache.AbolishCacheData("user", user.Username)
+		return verifyCode, nil
+	} else {
+		return "", exceptions.NewUnsuccessfulOperationError()
+	}
+}
+
+func (_UserService) VerifyUserPassword(username, verifyCode string) (bool, error) {
+	user, err := repository.UserRepo.FindUserByUsername(username)
+	if user == nil || err != nil {
+		return false, exceptions.NewNotFoundError("指定的用户不存在。")
+	}
+	hash := sha512.New512_256()
+	hash.Write([]byte(verifyCode))
+	hashedVerifyCode := string(hash.Sum(nil))
+	if hashedVerifyCode != user.Password {
+		return false, nil
+	} else {
+		return true, nil
+	}
+}
+
+func (_UserService) ResetUserPassword(username, password string) (bool, error) {
+	user, err := repository.UserRepo.FindUserByUsername(username)
+	if user == nil || err != nil {
+		return false, exceptions.NewNotFoundError("指定的用户不存在。")
+	}
+	hash := sha512.New512_256()
+	hash.Write([]byte(password))
+	user.Password = string(hash.Sum(nil))
+	user.ResetNeeded = false
+	affected, err := global.DBConn.ID(user.Id).Cols("password", "reset_needed").Update(user)
+	if err != nil {
+		return false, err
+	}
+	if affected > 0 {
+		cache.AbolishCacheData("user", user.Id)
+		cache.AbolishCacheData("user", user.Username)
+		return true, nil
+	} else {
+		return false, nil
+	}
+}