main.go

package main

import (
    "log"
    "os"

    "getcourse-video-downloader/internal/combiner"
    "getcourse-video-downloader/internal/downloader"
    "getcourse-video-downloader/internal/utils"
)

func main() {
    utils.ClearScreen()
    utils.PrintWelcomeMessage()
    // utils.ClearParts()

    log.SetFlags(log.Ldate | log.Ltime)

    if len(os.Args) < 3 {
        log.Println("Usage: ./getcourse-video-downloader <playlist_url> <output_file>")
        return
    }

    playlistURL := os.Args[1]
    outputFile := os.Args[2]

    err := os.MkdirAll("parts", 0755)
    if err != nil {
        log.Println("Error creating parts directory:", err)
        return
    }

    empty, err := utils.IsDirEmpty("parts")
    if err != nil {
        log.Println("Error checking if parts directory is empty:", err)
        return
    }

    if empty {
        log.Println("Downloading playlist...")
        playlist, err := downloader.DownloadPlaylist(playlistURL)
        if err != nil {
            log.Println("Error downloading playlist:", err)
            return
        }

        log.Printf("Found %d chunks in the playlist.\n", len(playlist)-1)

        err = downloader.DownloadFiles(playlist)
        if err != nil {
            log.Println("Error downloading files:", err)
            return
        }
        log.Println("Files downloaded successfully!")
    } else {
        log.Println("Parts directory is not empty. Skipping download.")
    }

    log.Println("Combining files...")
    err = combiner.CombineFiles(outputFile)
    if err != nil {
        log.Println("Error combining files:", err)
        return
    }
    log.Println("Files combined successfully!")

    utils.ClearParts()
    log.Println("Temporary files cleaned up successfully!")
}