Have got asynchronous publishing working

services/publisher/pqueue.go

@@ -0,0 +1,44 @@
+package publisher
+
+import (
+	"context"
+	"log"
+
+	"lmika.dev/lmika/weiro/models"
+)
+
+type Queue struct {
+	publisher *Publisher
+	pending   chan models.Site
+}
+
+func NewQueue(publisher *Publisher) *Queue {
+	return &Queue{
+		publisher: publisher,
+		pending:   make(chan models.Site, 1),
+	}
+}
+
+func (q *Queue) Queue(site models.Site) bool {
+	select {
+	case q.pending <- site:
+		return true
+	default:
+		return false
+	}
+}
+
+func (q *Queue) Start(ctx context.Context) {
+	go func() {
+		for {
+			select {
+			case site := <-q.pending:
+				if err := q.publisher.Publish(ctx, site); err != nil {
+					log.Printf("error publishing site: %v", err)
+				}
+			case <-ctx.Done():
+				return
+			}
+		}
+	}()
+}