mandarake parser rework

internal/parsers/mandarake/handleTasks.go

@@ -0,0 +1,60 @@
+package mandarake
+
+import (
+	"context"
+	"github.com/chromedp/chromedp"
+	log "github.com/sirupsen/logrus"
+	"sync"
+	"task-processor/internal/appState"
+	"task-processor/internal/shared"
+)
+
+func (s *Parser) HandleTasks(tasks []shared.Task, sender chan shared.TaskResult, state *appState.State) {
+	log.Debug(logHeader + logWorker + "handling tasks")
+
+	allocCtx, allocCancel := chromedp.NewRemoteAllocator(s.baseCtx, s.externalBrowser)
+
+	receiver := make(chan shared.Task, len(tasks))
+	for _, task := range tasks {
+		receiver <- task
+	}
+	close(receiver)
+
+	wg := sync.WaitGroup{}
+	for i := 0; i < s.goroutinesNumber; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			s.worker(allocCtx, receiver, sender, state)
+		}()
+	}
+	wg.Wait()
+	allocCancel()
+	log.Debug(logHeader + logWorker + "finished handling tasks")
+}
+
+func (s *Parser) worker(ctx context.Context, receiver chan shared.Task, sender chan shared.TaskResult, state *appState.State) {
+	pageCtx, pageCancel := chromedp.NewContext(ctx, chromedp.WithLogf(log.Printf))
+	defer pageCancel()
+
+	for task := range receiver {
+		log.WithField("task_uuid", task.MerchUuid).Debug(logHeader + logWorker + "processing task")
+
+		price, err := s.getPrice(pageCtx, task)
+		if err != nil {
+			log.WithField("task_uuid", task.MerchUuid).Warn(logHeader + logWorker + logTaskWarning + "failed to process, zero price")
+			sender <- shared.TaskResult{
+				MerchUuid: task.MerchUuid,
+				Origin:    task.Origin,
+				Price:     zeroPrice,
+			}
+			continue
+		}
+
+		sender <- shared.TaskResult{
+			MerchUuid: task.MerchUuid,
+			Origin:    task.Origin,
+			Price:     price,
+		}
+	}
+}