refactor: remove empty services (#116)

* remove empty services

* remove old factory

* remove old static files

* cleanup more duplicate service code

* file/folder reorg

backend/internal/core/services/service_group.go

@@ -0,0 +1,40 @@
+package services
+
+import (
+	"errors"
+	"time"
+
+	"github.com/hay-kot/homebox/backend/internal/data/repo"
+	"github.com/hay-kot/homebox/backend/pkgs/hasher"
+)
+
+type GroupService struct {
+	repos *repo.AllRepos
+}
+
+func (svc *GroupService) UpdateGroup(ctx Context, data repo.GroupUpdate) (repo.Group, error) {
+	if data.Name == "" {
+		data.Name = ctx.User.GroupName
+	}
+
+	if data.Currency == "" {
+		return repo.Group{}, errors.New("currency cannot be empty")
+	}
+
+	return svc.repos.Groups.GroupUpdate(ctx.Context, ctx.GID, data)
+}
+
+func (svc *GroupService) NewInvitation(ctx Context, uses int, expiresAt time.Time) (string, error) {
+	token := hasher.GenerateToken()
+
+	_, err := svc.repos.Groups.InvitationCreate(ctx, ctx.GID, repo.GroupInvitationCreate{
+		Token:     token.Hash,
+		Uses:      uses,
+		ExpiresAt: expiresAt,
+	})
+	if err != nil {
+		return "", err
+	}
+
+	return token.Raw, nil
+}