Skeleton of prototypical UI.

cardsim/player.go

@@ -423,3 +423,31 @@ func (p *Player[C]) EnactPermanentAction(actionIdx, choiceIdx int) (Message, err
 	}
 	return p.EnactPermanentActionUnchecked(actionIdx, choiceIdx)
 }
+
+// ReportError adds an error to the temporary messages, depending on
+// its severity and debug settings:
+//
+//   - If the error is nil, this never does anything.
+//   - If the error is serious, this emits the error if the debug level is
+//     -1 or greater.
+//   - If the error is only a warning, this emits the error if the debug
+//     level is 0 or greater.
+func (p *Player[C]) ReportError(e error) {
+	if e == nil || p.DebugLevel < -1 {
+		return
+	}
+	if p.DebugLevel < 0 && !IsSeriousError(e) {
+		return
+	}
+	p.ChapterBreak()
+	severity := "[Warning]"
+	if IsSeriousError(e) {
+		severity = "[ERROR]"
+	}
+	p.TemporaryMessages = append(p.TemporaryMessages, Msgf("%s: %v", severity, e))
+}
+
+// CanAct returns whether the player has actions theoretically available.
+func (p *Player[C]) CanAct() bool {
+	return p.ActionsRemaining > 0 && (len(p.Hand) > 0 || len(p.PermanentActions) > 0)
+}