From 91843e34e432f0d2305fffa0dd1feea1bd4953d6 Mon Sep 17 00:00:00 2001
From: Alphyron <admin@dragon-labs.de>
Date: Sat, 11 Apr 2020 22:53:59 +0200
Subject: [PATCH] :sparkles: Implement the GroupHelperService

---
 logic/grouphelperservice.go | 103 ++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 logic/grouphelperservice.go

diff --git a/logic/grouphelperservice.go b/logic/grouphelperservice.go
new file mode 100644
index 0000000..46fb9ee
--- /dev/null
+++ b/logic/grouphelperservice.go
@@ -0,0 +1,103 @@
+package logic
+
+import (
+	"errors"
+	"git.dragon-labs.de/alphyron/group_helper/models"
+)
+
+type groupHelperService struct {
+	groupHelperRepo GroupHelperRepository
+}
+
+func NewGroupHelperService(groupHelperRepo GroupHelperRepository) GroupHelperService {
+	return &groupHelperService{
+		groupHelperRepo: groupHelperRepo,
+	}
+}
+
+func (g groupHelperService) CreateGroup(group *models.Group) (*models.Group, error) {
+
+	if group.GroupID == 0 {
+		return nil, errors.New("you need set the group id to create a new group")
+	}
+	group.FillDefaultValues()
+
+	return g.CreateGroup(group)
+}
+
+func (g groupHelperService) UpdateGroup(group *models.Group) (*models.Group, error) {
+
+	if group.GroupID == 0 {
+		return nil, errors.New("you need set the group id to update an existing group")
+	}
+
+	return g.UpdateGroup(group)
+}
+
+func (g groupHelperService) GetGroupByID(groupID int64) (*models.Group, error) {
+	return g.groupHelperRepo.GetGroupByID(groupID)
+}
+
+func (g groupHelperService) GetGroupDatabaseSize(group *models.Group) (int, error) {
+	if group.ID == 0 {
+		return -1, errors.New("you need to set the id to get the size of connected users")
+	}
+
+	return g.groupHelperRepo.GetGroupDatabaseSize(group)
+}
+
+func (g groupHelperService) CreateUser(user *models.User) (*models.User, error) {
+	if user.UserID == 0 {
+		return nil, errors.New("you need to set the userID to create a new user")
+	}
+
+	return g.groupHelperRepo.CreateUser(user)
+}
+
+func (g groupHelperService) GetUserByID(userID int64) (*models.User, error) {
+	return g.groupHelperRepo.GetUserByID(userID)
+}
+
+func (g groupHelperService) UserJoinGroup(user *models.User, group *models.Group) (bool, error) {
+	if user.ID == 0 {
+		return false, errors.New("you need to give a valid id from the user to join a group")
+	}
+
+	if group.ID == 0 {
+		return false, errors.New("you need to give a valid id from the group to let a user join")
+	}
+
+	return g.groupHelperRepo.UserJoinGroup(user, group)
+}
+
+func (g groupHelperService) UserLeaveGroup(user *models.User, group *models.Group) (bool, error) {
+	if user.ID == 0 {
+		return false, errors.New("you need to give a valid id from the user to leave from group")
+	}
+
+	if group.ID == 0 {
+		return false, errors.New("you need to give a valid id from the group to let a user leave")
+	}
+
+	return g.groupHelperRepo.UserLeaveGroup(user, group)
+}
+
+func (g groupHelperService) IsUserInGroup(user *models.User, group *models.Group) (bool, error) {
+	if user.ID == 0 {
+		return false, errors.New("you need to give a valid id from the user to check if he is in a group")
+	}
+
+	if group.ID == 0 {
+		return false, errors.New("you need to give a valid id from the group to check if a user is in the group")
+	}
+
+	return g.groupHelperRepo.UserJoinGroup(user, group)
+}
+
+func (g groupHelperService) ListGroups() ([]*models.Group, error) {
+	return g.groupHelperRepo.ListGroups()
+}
+
+func (g groupHelperService) ListUsers() ([]*models.User, error) {
+	return g.groupHelperRepo.ListUsers()
+}