Integrate email notifications into signup and login (#38)

backend/product/app/api/config.go

@@ -2,13 +2,15 @@ package api
 
 import (
 	mwa "git.sendico.io/tech/sxchnge/product/auth/config"
+	"git.sendico.io/tech/sxchnge/product/notifications"
 	verificationconfig "git.sendico.io/tech/sxchnge/product/verification/config"
 )
 
 type Config struct {
-	Mw           *mwa.Config                `yaml:"middleware"`
-	AuthStorage  *mwa.AuthStorageConfig     `yaml:"auth_storage"`
-	Verification *verificationconfig.Config `yaml:"verification"`
+	Notifications *notifications.Config      `yaml:"notifications"`
+	Mw            *mwa.Config                `yaml:"middleware"`
+	AuthStorage   *mwa.AuthStorageConfig     `yaml:"auth_storage"`
+	Verification  *verificationconfig.Config `yaml:"verification"`
 }
 
 func (c *Config) SharedConfig() *Config {

backend/product/app/http/middleware.go

@@ -7,9 +7,12 @@ import (
 
 	mr "git.sendico.io/tech/sxchnge/product/app/metrics"
 	"git.sendico.io/tech/sxchnge/product/auth/config"
+	"git.sendico.io/tech/sxchnge/product/auth/flow"
 	httprouter "git.sendico.io/tech/sxchnge/product/auth/http"
 	"git.sendico.io/tech/sxchnge/product/auth/response"
 	authstorage "git.sendico.io/tech/sxchnge/product/auth/storage"
+	accountservice "git.sendico.io/tech/sxchnge/product/customers"
+	"git.sendico.io/tech/sxchnge/product/notifications"
 	"git.sendico.io/tech/sxchnge/product/sessions/browser"
 	"git.sendico.io/tech/sxchnge/shared/database"
 	"git.sendico.io/tech/sxchnge/shared/errors"
@@ -26,11 +29,12 @@ import (
 )
 
 type Middleware struct {
-	logger       mlogger.Logger
-	router       *chi.Mux
-	apiEndpoint  string
-	metrics      mr.Metrics
-	epdispatcher *httprouter.Dispatcher
+	notifications *notifications.Client
+	logger        mlogger.Logger
+	router        *chi.Mux
+	apiEndpoint   string
+	metrics       mr.Metrics
+	epdispatcher  *httprouter.Dispatcher
 }
 
 func (mw *Middleware) Handler(service mservice.Type, endpoint string, method api.HTTPMethod, handler sresponse.HandlerFunc) {
@@ -47,6 +51,9 @@ func (mw *Middleware) PendingAccountHandler(service mservice.Type, endpoint stri
 
 func (mw *Middleware) Finish() {
 	mw.metrics.Finish()
+	if mw.notifications != nil {
+		_ = mw.notifications.Close()
+	}
 }
 
 func (mw *Middleware) installMiddleware(config *middleware.Config, debug bool) {
@@ -107,6 +114,7 @@ func CreateMiddleware(
 	config *middleware.Config,
 	authStorage *middleware.AuthStorageConfig,
 	debug bool,
+	notificationConfig ...*notifications.Config,
 ) (*Middleware, error) {
 	if config == nil {
 		return nil, merrors.InvalidArgument("middleware configuration is required", "middleware")
@@ -139,6 +147,23 @@ func CreateMiddleware(
 		return nil, err
 	}
 
+	var authFlow *flow.Service
+	if len(notificationConfig) > 0 && notificationConfig[0] != nil {
+		c := notificationConfig[0]
+		customers, err := accountservice.NewAccountService(p.logger, db, &config.Password, authStorage)
+		if err != nil {
+			return nil, err
+		}
+		authFlow = &flow.Service{Accounts: stores.Accounts, Customers: customers, Tokens: stores.Verification, Transactions: db.TransactionFactory(), Attempts: stores.LoginAttempts, Secret: middleware.SignatureConf(config).PrivateKey, ActivationURL: c.ActivationURL}
+		if err = authFlow.Validate(); err != nil {
+			return nil, err
+		}
+		p.notifications, err = notifications.Open(*c)
+		if err != nil {
+			return nil, err
+		}
+		authFlow.Sender = p.notifications
+	}
 	p.epdispatcher = httprouter.NewDispatcher(
 		p.logger,
 		p.router,
@@ -148,6 +173,7 @@ func CreateMiddleware(
 		stores.LoginAttempts,
 		config,
 		loginRateLimits,
+		authFlow,
 	)
 	return p, nil
 }

backend/product/app/runtime/bootstrap.go

@@ -83,6 +83,7 @@ func (a *APIImp) installRuntimeBasics(
 		a.config.Mw,
 		a.config.AuthStorage,
 		debug,
+		a.config.Notifications,
 	); err != nil {
 		a.logger.Error("Failed to create middleware", zap.Error(err))
 		return err

backend/product/app/runtime/bootstrap_test.go

@@ -2,7 +2,6 @@ package runtime_test
 
 import (
 	"context"
-	sharedmodel "git.sendico.io/tech/sxchnge/shared/model"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -14,6 +13,7 @@ import (
 	"git.sendico.io/tech/sxchnge/product/app/profile"
 	sharedruntime "git.sendico.io/tech/sxchnge/product/app/runtime"
 	"git.sendico.io/tech/sxchnge/shared/database"
+	sharedmodel "git.sendico.io/tech/sxchnge/shared/model"
 	"github.com/go-chi/chi/v5"
 	"github.com/stretchr/testify/require"
 	"github.com/testcontainers/testcontainers-go/modules/mongodb"
@@ -48,6 +48,8 @@ func TestProfileStartsOnEmptyDatabase(t *testing.T) {
 	t.Setenv("SXCHNGE_API_PROTOCOL", "http")
 	t.Setenv("SXCHNGE_API_ENDPOINT", "/api/v1")
 	t.Setenv("SXCHNGE_JWT_SECRET", "test-only-signing-key-at-least-32-bytes")
+	t.Setenv("SXCHNGE_NOTIFICATIONS_TOKEN", "test-notification-token-at-least-32-bytes")
+	example.API.Notifications.CAFile = "" // This startup test makes no notification RPCs.
 	root, routes := chi.NewRouter(), chi.NewRouter()
 	runtime, err := sharedruntime.CreateAPI(ctx, zap.NewNop(), &example.API, &example.API, factory, root, routes, false, profile.Runtime())
 	require.NoError(t, err)