feat: complete registration invitation and auth redesign

server/registration_verification.go

@@ -0,0 +1,79 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/tinode/chat/server/logs"
+	"github.com/tinode/chat/server/store"
+	"github.com/tinode/chat/server/store/types"
+	"github.com/tinode/chat/server/validate"
+)
+
+const registrationSMSConfigCacheTTL = 30 * time.Second
+
+var registrationSMSConfigCache struct {
+	sync.Mutex
+	value     bool
+	loaded    bool
+	loadedAt  time.Time
+	loadValue func() (bool, error)
+}
+
+func registrationSMSEnabled(now time.Time) bool {
+	registrationSMSConfigCache.Lock()
+	defer registrationSMSConfigCache.Unlock()
+	if registrationSMSConfigCache.loaded && now.Sub(registrationSMSConfigCache.loadedAt) < registrationSMSConfigCacheTTL {
+		return registrationSMSConfigCache.value
+	}
+	loader := registrationSMSConfigCache.loadValue
+	if loader == nil {
+		loader = func() (bool, error) {
+			if store.RegistrationConfig == nil {
+				return true, types.ErrUnsupported
+			}
+			return store.RegistrationConfig.SMSEnabled()
+		}
+	}
+	value, err := loader()
+	if err != nil {
+		if registrationSMSConfigCache.loaded {
+			logs.Warn.Println("registration SMS config read failed; using cached value:", err)
+			return registrationSMSConfigCache.value
+		}
+		logs.Warn.Println("registration SMS config read failed; defaulting to enabled:", err)
+		return true
+	}
+	registrationSMSConfigCache.value = value
+	registrationSMSConfigCache.loaded = true
+	registrationSMSConfigCache.loadedAt = now
+	return value
+}
+
+func isValidIMInviteCode(value string) bool {
+	if len(value) != 5 {
+		return false
+	}
+	for i := range value {
+		if (value[i] < 'A' || value[i] > 'Z') && (value[i] < 'a' || value[i] > 'z') {
+			return false
+		}
+	}
+	return true
+}
+
+var sendIMVerificationCode = func(tenantID types.TenantID, recipient, lang, scene, code string) error {
+	if store.Store == nil {
+		return types.ErrInternal
+	}
+	validatorImpl := store.Store.GetValidator("tel")
+	sender, ok := validatorImpl.(validate.CodeSender)
+	if !ok || !validatorImpl.IsInitialized() {
+		return types.ErrUnsupported
+	}
+	if err := sender.SendCode(tenantID, recipient, lang, scene, code); err != nil {
+		return fmt.Errorf("send verification code: %w", err)
+	}
+	return nil
+}