appview/notify: add `DeleteIssue` event

Signed-off-by: Seongmin Lee <[e-mail]>

appview/indexer/issues/indexer.go

···
 	return batch.Flush()
 }
 
+func (ix *Indexer) Delete(ctx context.Context, issueId int64) error {
+	return ix.indexer.Delete(base36.Encode(issueId))
+}
+
 // Search searches for issues
 func (ix *Indexer) Search(ctx context.Context, opts models.IssueSearchOptions) (*SearchResult, error) {
 	var queries []query.Query

appview/indexer/notifier.go

···
 		l.Error("failed to index an issue", "err", err)
 	}
 }
+
+func (ix *Indexer) DeleteIssue(ctx context.Context, issue *models.Issue) {
+	l := log.FromContext(ctx).With("notifier", "indexer.DeleteIssue", "issue", issue)
+	l.Debug("deleting an issue")
+	err := ix.Issues.Delete(ctx, issue.Id)
+	if err != nil {
+		l.Error("failed to delete an issue", "err", err)
+	}
+}

appview/issues/issues.go

···
 		return
 	}
 
+	rp.notifier.DeleteIssue(r.Context(), issue)
+
 	// return to all issues page
 	rp.pages.HxRedirect(w, "/"+f.RepoInfo(user).FullName()+"/issues")
 }

appview/notify/db/db.go

···
 	)
 }
 
+func (n *databaseNotifier) DeleteIssue(ctx context.Context, issue *models.Issue) {
+	// no-op for now
+}
+
 func (n *databaseNotifier) NewFollow(ctx context.Context, follow *models.Follow) {
 	actorDid := syntax.DID(follow.UserDid)
 	recipients := []syntax.DID{syntax.DID(follow.SubjectDid)}

appview/notify/merged_notifier.go

···
 	m.fanout("NewIssueClosed", ctx, issue)
 }
 
+func (m *mergedNotifier) DeleteIssue(ctx context.Context, issue *models.Issue) {
+	m.fanout("DeleteIssue", ctx, issue)
+}
+
 func (m *mergedNotifier) NewFollow(ctx context.Context, follow *models.Follow) {
 	m.fanout("NewFollow", ctx, follow)
 }

appview/notify/notifier.go

···
 	NewIssue(ctx context.Context, issue *models.Issue)
 	NewIssueComment(ctx context.Context, comment *models.IssueComment)
 	NewIssueClosed(ctx context.Context, issue *models.Issue)
+	DeleteIssue(ctx context.Context, issue *models.Issue)
 
 	NewFollow(ctx context.Context, follow *models.Follow)
 	DeleteFollow(ctx context.Context, follow *models.Follow)
···
 func (m *BaseNotifier) NewIssue(ctx context.Context, issue *models.Issue)                 {}
 func (m *BaseNotifier) NewIssueComment(ctx context.Context, comment *models.IssueComment) {}
 func (m *BaseNotifier) NewIssueClosed(ctx context.Context, issue *models.Issue)           {}
+func (m *BaseNotifier) DeleteIssue(ctx context.Context, issue *models.Issue)              {}
 
 func (m *BaseNotifier) NewFollow(ctx context.Context, follow *models.Follow)    {}
 func (m *BaseNotifier) DeleteFollow(ctx context.Context, follow *models.Follow) {}