*.go: fetching the books with progress bar

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

cmd/root.go

@@ -47,13 +47,16 @@ to quickly create a Cobra application.`,
 	// Uncomment the following line if your bare application
 	// has an action associated with it:
 	Run: func(cmd *cobra.Command, args []string) {
-		b, err := goldenaudiobooks.BookScrape("https://goldenaudiobooks.com/the-water-dancer-oprahs-book-club-audiobook/")
-		if err != nil {
-			log.Fatal(err)
-		}
-		log.Debug(b)
-		if err = goldenaudiobooks.BookFetccher(b, ".", true); err != nil {
-			log.Fatal(err)
+		for _, arg := range args {
+			// "https://goldenaudiobooks.com/the-water-dancer-oprahs-book-club-audiobook/"
+			b, err := goldenaudiobooks.BookScrape(arg)
+			if err != nil {
+				log.Fatal(err)
+			}
+			log.Debug(b)
+			if err = goldenaudiobooks.BookFetcher(b, ".", viper.GetBool("create-local")); err != nil {
+				log.Fatal(err)
+			}
 		}
 	},
 }
@@ -79,6 +82,8 @@ func init() {
 	// Cobra also supports local flags, which will only run
 	// when this action is called directly.
 	rootCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+	rootCmd.Flags().StringP("dest", "d", ".", "destination base for fetched books")
+	rootCmd.Flags().BoolP("create-local", "C", false, "create files in local directory")
 }
 
 // initConfig reads in config file and ENV variables if set.

pkg/goldenaudiobooks/golden.go

@@ -23,10 +23,17 @@ package goldenaudiobooks
 
 import (
 	"fmt"
+	"io"
 	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strconv"
 	"strings"
 
 	"github.com/PuerkitoBio/goquery"
+	"github.com/cheggaaa/pb/v3"
+	log "github.com/sirupsen/logrus"
 )
 
 type Book struct {
@@ -62,7 +69,7 @@ func BookScrape(bookURL string) (*Book, error) {
 	doc.Find(".lazy-hidden").Each(func(i int, s *goquery.Selection) {
 		//title := s.Find("source").Text()
 		if src, exists := s.Attr("src"); exists && strings.Contains(src, ".mp3") {
-			fmt.Println(i, src)
+			//fmt.Println(i, src)
 			b.Files = append(b.Files, src)
 		}
 	})
@@ -72,6 +79,51 @@ func BookScrape(bookURL string) (*Book, error) {
 	return &b, nil
 }
 
-func BookFetccher(b *Book, dest string, mkdir bool) error {
+// BookFetcher creates a folder in dest, from the title in Book, and downloads the files there.
+// If no title is present, then one is generated and set in Book b.
+func BookFetcher(b *Book, dest string, createLocal bool) error {
+	p := dest
+	if !createLocal {
+		p = filepath.Join(dest, b.Title)
+		if err := os.MkdirAll(p, os.FileMode(0755)); err != nil {
+			return err
+		}
+	}
+	log.Infof("Title: %q", b.Title)
+
+	for _, f := range b.Files {
+		u, err := url.Parse(f)
+		if err != nil {
+			return err
+		}
+		fname := filepath.Base(u.Path)
+		fd, err := os.OpenFile(filepath.Join(p, fname), os.O_RDWR|os.O_CREATE, os.FileMode(0644))
+		if err != nil {
+			return err
+		}
+
+		log.Infof("Fetching %q", f)
+		resp, err := http.Get(f)
+		if err != nil {
+			return err
+		}
+		//log.Infof("%#v", resp)
+		if resp.StatusCode != http.StatusOK {
+			return fmt.Errorf("status: %d; url: %q", resp.StatusCode, f)
+		}
+		size, err := strconv.ParseInt(resp.Header.Get("content-length"), 10, 64)
+		if err != nil {
+			size = -1
+		}
+		bar := pb.Full.Start64(size)
+
+		barReader := bar.NewProxyReader(resp.Body)
+		i, err := io.Copy(fd, barReader)
+		if err != nil {
+			return err
+		}
+		bar.Finish()
+		log.Infof("wrote %q (%d)", fname, i)
+	}
 	return nil
 }