Domain block (#76)

* start work on admin domain blocking

* move stuff around + further work on domain blocks

* move + restructure processor

* prep work for deleting account

* tidy

* go fmt

* formatting

* domain blocking more work

* check domain blocks way earlier on

* progress on delete account

* delete more stuff when an account is gone

* and more...

* domain blocky block block

* get individual domain block, delete a block

internal/processing/media/delete.go

@@ -0,0 +1,51 @@
+package media
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) Delete(mediaAttachmentID string) gtserror.WithCode {
+	a := &gtsmodel.MediaAttachment{}
+	if err := p.db.GetByID(mediaAttachmentID, a); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			// attachment already gone
+			return nil
+		}
+		// actual error
+		return gtserror.NewErrorInternalError(err)
+	}
+
+	errs := []string{}
+
+	// delete the thumbnail from storage
+	if a.Thumbnail.Path != "" {
+		if err := p.storage.RemoveFileAt(a.Thumbnail.Path); err != nil {
+			errs = append(errs, fmt.Sprintf("remove thumbnail at path %s: %s", a.Thumbnail.Path, err))
+		}
+	}
+
+	// delete the file from storage
+	if a.File.Path != "" {
+		if err := p.storage.RemoveFileAt(a.File.Path); err != nil {
+			errs = append(errs, fmt.Sprintf("remove file at path %s: %s", a.File.Path, err))
+		}
+	}
+
+	// delete the attachment
+	if err := p.db.DeleteByID(mediaAttachmentID, a); err != nil {
+		if _, ok := err.(db.ErrNoEntries); !ok {
+			errs = append(errs, fmt.Sprintf("remove attachment: %s", err))
+		}
+	}
+
+	if len(errs) != 0 {
+		return gtserror.NewErrorInternalError(fmt.Errorf("Delete: one or more errors removing attachment with id %s: %s", mediaAttachmentID, strings.Join(errs, "; ")))
+	}
+
+	return nil
+}