feat: basic schedule

internal/events/schedule_reactions.go

@@ -0,0 +1,87 @@
+package events
+
+import (
+	"context"
+	"log"
+	"strconv"
+
+	"velox-bot/internal/db/repos/schedulerepo"
+	"velox-bot/internal/db/services"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+// HandleMessageReactionAdd reacts to emoji on schedule DM messages:
+// ✅ accept, ❌ decline, 🔁 request reschedule.
+func HandleMessageReactionAdd(s *discordgo.Session, r *discordgo.MessageReactionAdd, svc *services.Services) {
+	if svc == nil || svc.Schedule == nil {
+		return
+	}
+	if r == nil || r.UserID == "" || r.MessageID == "" {
+		return
+	}
+
+	// Ignore bot reactions.
+	if r.Member != nil && r.Member.User != nil && r.Member.User.Bot {
+		return
+	}
+
+	msgID64, err := strconv.ParseInt(r.MessageID, 10, 64)
+	if err != nil || msgID64 == 0 {
+		return
+	}
+
+	ctx := context.Background()
+	sch, err := svc.Schedule.GetByMessageID(ctx, msgID64)
+	if err != nil || sch == nil {
+		return
+	}
+
+	// Only invitee can react to change status.
+	if r.UserID != strconv.FormatInt(sch.InviteeID, 10) {
+		return
+	}
+
+	// Only pending can be transitioned by reaction.
+	if sch.Status != schedulerepo.StatusPending {
+		return
+	}
+
+	var newStatus schedulerepo.ScheduleStatus
+	switch r.Emoji.Name {
+	case "✅":
+		newStatus = schedulerepo.StatusAccepted
+	case "❌":
+		newStatus = schedulerepo.StatusDeclined
+	case "🔁":
+		newStatus = schedulerepo.StatusRescheduleRequested
+	default:
+		return
+	}
+
+	if err := svc.Schedule.UpdateStatus(ctx, sch.ID, newStatus); err != nil {
+		log.Printf("schedule: failed to update status id=%d: %v", sch.ID, err)
+		return
+	}
+
+	// Notify requester via DM.
+	requesterID := strconv.FormatInt(sch.RequesterID, 10)
+	dmCh, err := s.UserChannelCreate(requesterID)
+	if err != nil {
+		return
+	}
+
+	statusText := map[schedulerepo.ScheduleStatus]string{
+		schedulerepo.StatusAccepted:            "accepted ✅",
+		schedulerepo.StatusDeclined:            "declined ❌",
+		schedulerepo.StatusRescheduleRequested: "requested rescheduling 🔁",
+	}[newStatus]
+
+	content := "Your session request with <@" + strconv.FormatInt(sch.InviteeID, 10) + "> for " +
+		sch.ScheduledAt.UTC().Format("2006-01-02 15:04") + " UTC has been " + statusText + "."
+
+	if _, err := s.ChannelMessageSend(dmCh.ID, content); err != nil {
+		log.Printf("schedule: failed to DM requester about status change: %v", err)
+	}
+}
+

internal/events/schedule_reminders.go

@@ -0,0 +1,92 @@
+package events
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"strconv"
+	"time"
+
+	"velox-bot/internal/db/services"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+// StartScheduleReminderLoop runs a background loop that periodically checks for
+// upcoming sessions and sends DM reminders to all participants.
+func StartScheduleReminderLoop(s *discordgo.Session, svc *services.Services) {
+	if svc == nil || svc.Schedule == nil || s == nil {
+		return
+	}
+
+	const (
+		interval       = time.Minute      // check every minute
+		remindBefore   = 10 * time.Minute // remind 10 minutes before
+		initialDelay   = 10 * time.Second
+	)
+
+	go func() {
+		// small delay so the bot can fully start
+		time.Sleep(initialDelay)
+
+		ticker := time.NewTicker(interval)
+		defer ticker.Stop()
+
+		for range ticker.C {
+			now := time.Now().UTC()
+			ctx := context.Background()
+
+			// Find all sessions that start in the next `remindBefore` window and haven't been reminded.
+			schedules, err := svc.Schedule.ListDueForReminder(ctx, now, remindBefore)
+			if err != nil {
+				log.Printf("schedule: reminder query failed: %v", err)
+				continue
+			}
+			for _, sch := range schedules {
+				if sch == nil {
+					continue
+				}
+
+				// Build reminder text
+				whenStr := sch.ScheduledAt.UTC().Format("2006-01-02 15:04")
+				base := fmt.Sprintf("Reminder: you have a scheduled session at %s UTC with <@%d>.", whenStr, sch.InviteeID)
+				desc := sch.Description
+				if desc != "" {
+					base += "\nTopic: " + desc
+				}
+
+				// Notify requester
+				if err := dmUser(s, sch.RequesterID, base); err != nil {
+					log.Printf("schedule: failed to DM requester reminder: %v", err)
+				}
+
+				// Notify invitee (mirror text with requester mention)
+				baseInvitee := fmt.Sprintf("Reminder: you have a scheduled session at %s UTC with <@%d>.", whenStr, sch.RequesterID)
+				if desc != "" {
+					baseInvitee += "\nTopic: " + desc
+				}
+				if err := dmUser(s, sch.InviteeID, baseInvitee); err != nil {
+					log.Printf("schedule: failed to DM invitee reminder: %v", err)
+				}
+
+				if err := svc.Schedule.MarkReminded(ctx, sch.ID); err != nil {
+					log.Printf("schedule: failed to mark reminder sent for id=%d: %v", sch.ID, err)
+				}
+			}
+		}
+	}()
+}
+
+func dmUser(s *discordgo.Session, userID int64, content string) error {
+	if s == nil || userID == 0 {
+		return nil
+	}
+	uid := strconv.FormatInt(userID, 10)
+	ch, err := s.UserChannelCreate(uid)
+	if err != nil {
+		return err
+	}
+	_, err = s.ChannelMessageSend(ch.ID, content)
+	return err
+}
+