Ensure DeleteUser is not allowed to Delete Orgs and visa versa (#10134)

* add check to DeleteUser

* add check to DeleteOrganization

* add Test

* remove redundancy (deleteOrg is only used in DeleteOrganization)

* Update models/org.go

Co-authored-by: zeripath <art27@cantab.net>

models/org.go

 
 // DeleteOrganization completely and permanently deletes everything of organization.
 func DeleteOrganization(org *User) (err error) {
+	if !org.IsOrganization() {
+		return fmt.Errorf("%s is a user not an organization", org.Name)
+	}
+
 	sess := x.NewSession()
 	defer sess.Close()
 
 }
 
 func deleteOrg(e *xorm.Session, u *User) error {
-	if !u.IsOrganization() {
-		return fmt.Errorf("You can't delete none organization user: %s", u.Name)
-	}
-
 	// Check ownership of repository.
 	count, err := getRepositoryCount(e, u)
 	if err != nil {

models/org_test.go

 	assert.Error(t, err)
 	assert.True(t, IsErrUserOwnRepos(err))
 
-	nonOrg := AssertExistsAndLoadBean(t, &User{ID: 5}).(*User)
-	assert.Error(t, DeleteOrganization(nonOrg))
+	user := AssertExistsAndLoadBean(t, &User{ID: 5}).(*User)
+	assert.Error(t, DeleteOrganization(user))
 	CheckConsistencyFor(t, &User{}, &Team{})
 }
 

models/user.go

 // DeleteUser completely and permanently deletes everything of a user,
 // but issues/comments/pulls will be kept and shown as someone has been deleted.
 func DeleteUser(u *User) (err error) {
+	if u.IsOrganization() {
+		return fmt.Errorf("%s is an organization not a user", u.Name)
+	}
+
 	sess := x.NewSession()
 	defer sess.Close()
 	if err = sess.Begin(); err != nil {

models/user_test.go

 	test(4)
 	test(8)
 	test(11)
+
+	org := AssertExistsAndLoadBean(t, &User{ID: 3}).(*User)
+	assert.Error(t, DeleteUser(org))
 }
 
 func TestEmailNotificationPreferences(t *testing.T) {