added CLI flags

downloader/downloader.go

@@ -8,6 +8,7 @@ import (
 	"os"
 	"path/filepath"
 	"regexp"
+	"sync"
 )
 
 type ContentPageData struct {
@@ -97,10 +98,13 @@ func DownloadSingle(url string, subtitleLang string, parentDirectory string) {
 	fmt.Println()
 }
 
-func DownloadSeason(url string, seasonName string, subtitleLang string) {
+func DownloadSeason(url string, seasonName string, subtitleLang string, maxConcurrent int) {
 	id := ExtractContentId(url)
 	data := GetContentPageData(id)
-
+	var wg sync.WaitGroup
+    
+    currentConcurrent := 1
+    
 	title := data.Data.MainContent.Title
 	seasonList := data.Data.SeasonList
 	if seasonList.Type != "seasonal" {
@@ -112,10 +116,22 @@ func DownloadSeason(url string, seasonName string, subtitleLang string) {
 			for _, seasonContent := range season.Contents {
 				parentDirName := title
 				_ = os.Mkdir(parentDirName, os.ModePerm) // dont care if directory fails to create
-				DownloadSingle(seasonContent.Url, subtitleLang, parentDirName)
+                
+                if currentConcurrent < maxConcurrent {
+                    wg.Add(1)
+                    currentConcurrent++
+                    go func() {
+                        defer wg.Done()
+                        fmt.Println("Running in parallel")
+                        DownloadSingle(seasonContent.Url, subtitleLang, parentDirName)
+                    }()
+                } else {
+                    DownloadSingle(seasonContent.Url, subtitleLang, parentDirName)
+                }
 			}
 		}
 	}
+	wg.Wait()
 }
 
 func GetContentPageData(contentId string) *ContentPageData {