feat: add eve chanting notif

internal/service/reminder_service.go

@@ -15,6 +15,7 @@ package service
 import (
 	"context"
 	"errors"
+	"fmt"
 	"strconv"
 	"strings"
 	"time"
@@ -37,6 +38,10 @@ const (
 	// the overlap.
 	reminderWindowMin = 20
 
+	// The evening "finish your rounds" reminder fires at 21:00 local. Kept
+	// before the 21:30 quote reminder so the two don't collide in one tick.
+	chantIncompleteTime = "21:00"
+
 	chantMsgStart     = "Chant with Prabhupāda — start building your sādhana streak."
 	chantMsgLapsed    = "Just one hour of sādhana can save you from this duḥkhālayam aśāśvatam. Come and build your streak again."
 	chantMsgYesterday = "Your sādhana was wonderful yesterday! Let's continue your sādhana today as well."
@@ -112,6 +117,21 @@ func (s *ReminderService) RunOnce(ctx context.Context, now time.Time) {
 			}
 		}
 
+		// Evening "incomplete chanting" reminder — the devotee started their
+		// rounds today (RoundsToday > 0) but hasn't reached the target by
+		// 21:00 local. Only nudges those who began, so non-starters get just
+		// the morning reminder, not a second one. Independent of the morning
+		// chant reminder (own time + own per-day dedupe).
+		if c.RoundsToday > 0 && !c.ChantDoneToday && notRemindedToday(c.LastChantIncompleteOn, utcToday) {
+			if t := parseHHMM(chantIncompleteTime); t >= 0 && withinWindow(localMin, t) {
+				s.notif.SendReminder(ctx, c.UserID, NotifChantIncomplete,
+					"Finish your japa 🙏", incompleteChantMessage(c.RoundsToday, c.TargetRounds), s.sadhnaURL)
+				if err := s.repo.MarkChantIncompleteReminded(ctx, c.UserID, utcToday); err != nil {
+					s.logger.Warn("reminders: mark chant-incomplete failed", zap.String("user", c.UserID), zap.Error(err))
+				}
+			}
+		}
+
 		// Quote reminder.
 		if !c.QuoteDoneToday && notRemindedToday(c.LastQuoteOn, utcToday) {
 			if t := parseHHMM(c.QuoteTime); t >= 0 && withinWindow(localMin, t) {
@@ -143,6 +163,17 @@ func chantMessage(lastChant *time.Time, utcToday time.Time) string {
 	}
 }
 
+// incompleteChantMessage nudges a devotee who began their rounds today to
+// finish them (only sent when rounds > 0).
+func incompleteChantMessage(rounds, target int) string {
+	if target <= 0 {
+		target = 16
+	}
+	return fmt.Sprintf(
+		"You've chanted %d of %d rounds today — finish your japa before the day ends. 🙏",
+		rounds, target)
+}
+
 // notRemindedToday is true when no reminder of this kind has gone out on the
 // current UTC day.
 func notRemindedToday(last *time.Time, utcToday time.Time) bool {