feat(backend): implement task creation and admin web

backend-api/cmd/api/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"database/sql"
 	"errors"
 	"log"
 	"net/http"
@@ -11,8 +12,13 @@ import (
 	"time"
 
 	"cmroubao/backend-api/internal/config"
+	"cmroubao/backend-api/internal/platform/assetstore"
 	"cmroubao/backend-api/internal/platform/database"
+	"cmroubao/backend-api/internal/platform/migration"
+	repository "cmroubao/backend-api/internal/repository/sqlite"
 	"cmroubao/backend-api/internal/transport/httpapi"
+	"cmroubao/backend-api/internal/transport/webui"
+	"cmroubao/backend-api/internal/usecase"
 )
 
 func main() {
@@ -43,10 +49,11 @@ func run() error {
 		}
 	}()
 
-	router, err := httpapi.NewRouter(db, func(event string) {
-		log.Print(event)
-	})
+	router, err := buildRouter(startupContext, cfg, db)
 	if err != nil {
+		if errors.Is(err, errPendingMigrations) {
+			return err
+		}
 		return errors.New("HTTP router setup failed")
 	}
 	server := httpapi.NewServer(cfg, router)
@@ -111,3 +118,93 @@ func shutdownServer(
 	}
 	return nil
 }
+
+type migrationStatusReader interface {
+	Status(context.Context) ([]migration.Status, error)
+}
+
+var errPendingMigrations = errors.New(
+	"database migrations are pending; run migrate up",
+)
+
+func buildRouter(
+	ctx context.Context,
+	cfg config.Config,
+	db *sql.DB,
+) (http.Handler, error) {
+	runner, err := migration.New(db)
+	if err != nil {
+		return nil, err
+	}
+	if err := requireCurrentMigrations(ctx, runner); err != nil {
+		return nil, err
+	}
+
+	store, err := repository.New(db)
+	if err != nil {
+		return nil, err
+	}
+	files, err := assetstore.New(cfg.AssetDirectory)
+	if err != nil {
+		return nil, err
+	}
+	clock := usecase.SystemClock{}
+	ids := usecase.UUIDGenerator{}
+	assets, err := usecase.NewAssetService(store, files, clock, ids)
+	if err != nil {
+		return nil, err
+	}
+	tasks, err := usecase.NewTaskService(store, clock, ids)
+	if err != nil {
+		return nil, err
+	}
+
+	webService, err := webui.NewUsecaseAdapter(tasks, assets)
+	if err != nil {
+		return nil, err
+	}
+	renderer, err := webui.NewRenderer()
+	if err != nil {
+		return nil, err
+	}
+	webHandler, err := webui.NewHandler(webService, renderer)
+	if err != nil {
+		return nil, err
+	}
+	registerAdminRoutes, err := httpapi.NewAdminRouteRegistrar(
+		httpapi.AdminServices{
+			Assets: assets,
+			Tasks:  tasks,
+		},
+		webHandler,
+	)
+	if err != nil {
+		return nil, err
+	}
+	return httpapi.NewRouter(httpapi.RouterDependencies{
+		Database:            db,
+		RegisterAdminRoutes: registerAdminRoutes,
+		LogEvent: func(event string) {
+			log.Print(event)
+		},
+	})
+}
+
+func requireCurrentMigrations(
+	ctx context.Context,
+	reader migrationStatusReader,
+) error {
+	statuses, err := reader.Status(ctx)
+	if err != nil {
+		return errors.New("database migration status failed")
+	}
+	if len(statuses) == 0 {
+		return errors.New("database has no known migrations")
+	}
+	for _, status := range statuses {
+		if !status.Applied {
+			return errPendingMigrations
+		}
+	}
+	return nil
+}