refactor: split modules and harden scraping workflows

internal/service/scanner_cloud_status_test.go

@@ -0,0 +1,57 @@
+package service
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/ShukeBta/MediaStationGo/internal/model"
+)
+
+func TestBeginCloudScanAllowsQueuedEntryToStart(t *testing.T) {
+	scanner := &ScannerService{
+		cloudScans: map[string]*cloudScanEntry{
+			"lib-1": {status: CloudScanStatus{LibraryID: "lib-1", Provider: "openlist", State: "queued", Stage: "queued"}},
+		},
+	}
+	lib := &model.Library{Base: model.Base{ID: "lib-1"}, Name: "Movies"}
+	mount := CloudMountInfo{Provider: "openlist"}
+
+	_, finish, err := scanner.beginCloudScan(context.Background(), lib, mount)
+	if err != nil {
+		t.Fatalf("queued scan should be allowed to start, got %v", err)
+	}
+	if finish == nil {
+		t.Fatal("finish callback should not be nil")
+	}
+	statuses := scanner.CloudScanStatuses()
+	if len(statuses) != 1 || statuses[0].State != "running" || statuses[0].Stage != "listing" {
+		t.Fatalf("status after begin = %#v, want running/listing", statuses)
+	}
+
+	finish(&ScanResult{Visited: 5, Added: 2, Updated: 1, ErrorCount: 1, Errors: []string{"bad file"}}, nil)
+	statuses = scanner.CloudScanStatuses()
+	if len(statuses) != 1 || statuses[0].State != "finished" || statuses[0].Visited != 5 || statuses[0].Added != 2 || statuses[0].ErrorCount != 1 {
+		t.Fatalf("status after finish = %#v", statuses)
+	}
+	if statuses[0].Error == "" {
+		t.Fatal("finished scan with error_count should keep summary error text")
+	}
+}
+
+func TestBeginCloudScanRejectsRunningEntry(t *testing.T) {
+	scanner := &ScannerService{
+		cloudScans: map[string]*cloudScanEntry{
+			"lib-1": {status: CloudScanStatus{LibraryID: "lib-1", Provider: "openlist", State: "running", Stage: "listing"}},
+		},
+	}
+	lib := &model.Library{Base: model.Base{ID: "lib-1"}, Name: "Movies"}
+
+	_, finish, err := scanner.beginCloudScan(context.Background(), lib, CloudMountInfo{Provider: "openlist"})
+	if !errors.Is(err, ErrCloudScanAlreadyRunning) {
+		t.Fatalf("err = %v, want ErrCloudScanAlreadyRunning", err)
+	}
+	if finish != nil {
+		t.Fatal("finish callback should be nil when begin is rejected")
+	}
+}