branding for server

internal/app/files/system_avatar_seed.go

@@ -0,0 +1,44 @@
+package files
+
+import (
+	"context"
+	_ "embed"
+	"time"
+
+	"telesrv/internal/domain"
+)
+
+//go:embed seedassets/owpengram_system_avatar.png
+var officialSystemAvatarPNG []byte
+
+// SeedOfficialSystemAvatar idempotently seeds the built-in official system
+// account's (777000) profile photo from the bundled brand logo, writing it
+// under the fixed domain.OfficialSystemUserPhotoID so the photo/blob layer
+// and the pure domain.OfficialSystemUser() struct literal stay in sync
+// across restarts. Returns true if it actually wrote a new photo.
+func (s *Service) SeedOfficialSystemAvatar(ctx context.Context) (bool, error) {
+	photoID := domain.OfficialSystemUserPhotoID
+	if existing, found, err := s.media.GetPhoto(ctx, photoID); err != nil {
+		return false, err
+	} else if found {
+		domain.SetOfficialSystemUserAvatar(existing.DCID, domain.StrippedFromSizes(existing.Sizes))
+		return false, nil
+	}
+	sizes, err := s.putPhotoStaticSizes(ctx, photoID, officialSystemAvatarPNG, photoSizeSpecsForAvatar(officialSystemAvatarPNG))
+	if err != nil {
+		return false, err
+	}
+	photo := domain.Photo{
+		ID:            photoID,
+		AccessHash:    domain.OfficialSystemUserPhotoAccessHash,
+		FileReference: randomFileReference(),
+		Date:          int(time.Now().Unix()),
+		DCID:          s.dc,
+		Sizes:         sizes,
+	}
+	if err := s.media.PutPhoto(ctx, photo); err != nil {
+		return false, err
+	}
+	domain.SetOfficialSystemUserAvatar(photo.DCID, domain.StrippedFromSizes(photo.Sizes))
+	return true, nil
+}