feat: remindme plugin

internal/queue/queue.go

@@ -3,6 +3,9 @@ package queue
 import (
 	"log/slog"
 	"sync"
+	"time"
+
+	"git.nakama.town/fmartingr/butterrobot/internal/model"
 )
 
 // Item represents a queue item
@@ -14,14 +17,19 @@ type Item struct {
 // HandlerFunc defines a function that processes queue items
 type HandlerFunc func(item Item)
 
+// ReminderHandlerFunc defines a function that processes reminder items
+type ReminderHandlerFunc func(reminder *model.Reminder)
+
 // Queue represents a message queue
 type Queue struct {
-	items    chan Item
-	wg       sync.WaitGroup
-	quit     chan struct{}
-	logger   *slog.Logger
-	running  bool
-	runMutex sync.Mutex
+	items           chan Item
+	wg              sync.WaitGroup
+	quit            chan struct{}
+	logger          *slog.Logger
+	running         bool
+	runMutex        sync.Mutex
+	reminderTicker  *time.Ticker
+	reminderHandler ReminderHandlerFunc
 }
 
 // New creates a new Queue instance
@@ -49,6 +57,24 @@ func (q *Queue) Start(handler HandlerFunc) {
 	go q.worker(handler)
 }
 
+// StartReminderScheduler starts the reminder scheduler
+func (q *Queue) StartReminderScheduler(handler ReminderHandlerFunc) {
+	q.runMutex.Lock()
+	defer q.runMutex.Unlock()
+
+	if q.reminderTicker != nil {
+		return
+	}
+
+	q.reminderHandler = handler
+
+	// Check for reminders every minute
+	q.reminderTicker = time.NewTicker(1 * time.Minute)
+
+	q.wg.Add(1)
+	go q.reminderWorker()
+}
+
 // Stop stops processing queue items
 func (q *Queue) Stop() {
 	q.runMutex.Lock()
@@ -59,6 +85,12 @@ func (q *Queue) Stop() {
 	}
 
 	q.running = false
+
+	// Stop reminder ticker if it exists
+	if q.reminderTicker != nil {
+		q.reminderTicker.Stop()
+	}
+
 	close(q.quit)
 	q.wg.Wait()
 }
@@ -96,4 +128,34 @@ func (q *Queue) worker(handler HandlerFunc) {
 			return
 		}
 	}
-}
+}
+
+// reminderWorker processes reminder items on a schedule
+func (q *Queue) reminderWorker() {
+	defer q.wg.Done()
+
+	for {
+		select {
+		case <-q.reminderTicker.C:
+			// This is triggered every minute to check for pending reminders
+			q.logger.Debug("Checking for pending reminders")
+
+			if q.reminderHandler != nil {
+				// The handler is responsible for fetching and processing reminders
+				func() {
+					defer func() {
+						if r := recover(); r != nil {
+							q.logger.Error("Panic in reminder worker", "error", r)
+						}
+					}()
+
+					// Call the handler with a nil reminder to indicate it should check the database
+					q.reminderHandler(nil)
+				}()
+			}
+		case <-q.quit:
+			// Quit worker
+			return
+		}
+	}
+}