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tenant.go
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tenant.go
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package domain
import (
"errors"
)
type tenantLanguages []LangID
func (t tenantLanguages) Append(l LangID) tenantLanguages {
nt := t[:]
return append(nt, l)
}
func (t tenantLanguages) Delete(l LangID) tenantLanguages {
langs := tenantLanguages{}
for _, ln := range t {
if ln != l {
langs = append(langs, ln)
}
}
return langs
}
func (t tenantLanguages) Exists(l LangID) bool {
for _, ln := range t {
if l == ln {
return true
}
}
return false
}
type tenantMembers []UserID
func (t tenantMembers) Append(m UserID) tenantMembers {
nt := t[:]
return append(nt, m)
}
func (t tenantMembers) Delete(m UserID) tenantMembers {
users := tenantMembers{}
for _, u := range t {
if u != m {
users = append(users, u)
}
}
return users
}
// Tenant manages langs and categories
type Tenant struct {
ID TenantID
Name string
DefaultLang LangID
Members tenantMembers
Languages tenantLanguages
}
// TenantRepository is interface for Tenant repository
type TenantRepository interface {
DispenseID() TenantID
Find(id string) *Tenant
Save(t *Tenant)
}
// TenantFactory provides builder for Tenant
type TenantFactory struct {
tRepo TenantRepository
}
// NewTenantFactory returns TenantFactory object
func NewTenantFactory(r TenantRepository) *TenantFactory {
return &TenantFactory{tRepo: r}
}
// Build returns initialized Tenant object
func (f *TenantFactory) Build(name string, dl LangID) *Tenant {
return &Tenant{
ID: f.tRepo.DispenseID(),
Name: name,
DefaultLang: dl,
Members: tenantMembers{},
Languages: tenantLanguages{dl},
}
}
// AddLanguage set new language to use
func (t *Tenant) AddLanguage(l LangID) *Tenant {
return &Tenant{
ID: t.ID,
Name: t.Name,
DefaultLang: t.DefaultLang,
Members: t.Members,
Languages: t.Languages.Append(l),
}
}
// DeleteLanguage unset language for unuse
func (t *Tenant) DeleteLanguage(l LangID) *Tenant {
return &Tenant{
ID: t.ID,
Name: t.Name,
DefaultLang: t.DefaultLang,
Members: t.Members,
Languages: t.Languages.Delete(l),
}
}
// ChangeDefaultLang set default language for tenant
func (t *Tenant) ChangeDefaultLang(l LangID) (*Tenant, error) {
if t.Languages.Exists(l) {
nt := &Tenant{
ID: t.ID,
Name: t.Name,
DefaultLang: l,
Members: t.Members,
Languages: t.Languages,
}
return nt, nil
}
return nil, errors.New("specified lang is not registered")
}
// AddMember set new member of tenant
func (t *Tenant) AddMember(m UserID) *Tenant {
return &Tenant{
ID: t.ID,
Name: t.Name,
DefaultLang: t.DefaultLang,
Members: t.Members.Append(m),
Languages: t.Languages,
}
}
// DeleteMember unset member
func (t *Tenant) DeleteMember(m UserID) *Tenant {
return &Tenant{
ID: t.ID,
Name: t.Name,
DefaultLang: t.DefaultLang,
Members: t.Members.Delete(m),
Languages: t.Languages,
}
}
// TenantSpecification provides validation for tenant operation
type TenantSpecification struct {
tRepo TenantRepository
uRepo UserRepository
}
// NewTenantSpecification returns TenantSpecification object
func NewTenantSpecification(t TenantRepository, u UserRepository) *TenantSpecification {
return &TenantSpecification{tRepo: t, uRepo: u}
}
// SpecifyOperateLabel returns whether given operator can operate by given tenant or not
func (s *TenantSpecification) SpecifyOperateLabel(tenantid, opID string) error {
t := s.tRepo.Find(tenantid)
if t == nil {
return errors.New("tenant not found")
}
o := s.uRepo.Find(opID)
if o == nil {
return errors.New("operator not found")
}
isMember := false
for _, u := range t.Members {
if u == o.ID {
isMember = true
break
}
}
if !isMember {
return errors.New("operator is not a member of this tenant")
}
canEdit := false
for _, r := range o.Roles {
if r == RoleEditor {
canEdit = true
break
}
}
if !canEdit {
return errors.New("operator has no permission")
}
return nil
}