feat: queued mutations while reloading or offline

pr_editor.go

@@ -100,8 +100,11 @@ func (m App) pullRequestUpdateUnavailable() string {
 	if m.loading {
 		return "pull request update unavailable while PR data is refreshing"
 	}
-	if m.details.FromCache {
-		return "pull request update unavailable from an offline cached snapshot"
+	if m.details.FromCache && m.mutations == nil {
+		return "offline mutation queue is unavailable"
+	}
+	if m.mutations != nil && m.mutations.loadErr != nil {
+		return "mutation queue is unavailable: " + m.mutations.loadErr.Error()
 	}
 	if _, ok := m.service.(GitHubPullRequestWriteService); !ok {
 		return "configured GitHub service does not support pull request updates"
@@ -302,6 +305,21 @@ func (m App) positionPREditHardwareCursor(scroll, viewportHeight int) {
 }
 
 func (m App) submitPREdit() tea.Cmd {
+	if m.mutations != nil {
+		operation := mutationOperation{
+			Kind: mutationPREdit, Owner: m.details.Owner, Repository: m.details.Repository,
+			Number: m.details.Number, PRID: m.details.ID, Viewer: m.details.ViewerLogin,
+			Original: m.prEditOriginal, Update: m.prEditMetadata(),
+			Permissions: m.details.Permissions,
+		}
+		if m.editingMutationID != "" {
+			if existing, ok := m.mutations.get(m.editingMutationID); ok {
+				operation.ID, operation.EnqueuedAt = existing.ID, existing.EnqueuedAt
+				return m.replaceMutation(operation)
+			}
+		}
+		return m.enqueueMutation(operation)
+	}
 	writer := m.service.(GitHubPullRequestWriteService)
 	peopleWriter := m.service.(GitHubPullRequestPeopleWriteService)
 	id := m.details.ID
@@ -447,6 +465,7 @@ func (m *App) applyPREditPeople(people PullRequestPeople) {
 }
 
 func (m *App) clearPREdit() {
+	m.editingMutationID = ""
 	m.prEditField = 0
 	m.prEditEditors = [prEditFieldCount]textEditor{}
 	m.prEditOriginal = PullRequestMetadata{}