Перенесены util из perxis, перенесен код dowloader'a

pkg/cli/gracefull.go

+package cli
+
+import (
+	"os"
+	"os/signal"
+	"syscall"
+
+	"go.uber.org/zap"
+)
+
+func WaitForQuit(logger *zap.Logger, finailizer func()) {
+	donec := make(chan struct{})
+	sigc := make(chan os.Signal, 1)
+	signal.Notify(sigc, syscall.SIGTERM, os.Interrupt)
+	var signalsReceived uint
+	go func() {
+		for {
+			select {
+			case s := <-sigc:
+				logger.Info("Signal received. Exiting", zap.String("Signal", s.String()))
+				signalsReceived++
+
+				if signalsReceived < 2 {
+					// After first Ctrl+C start quitting the worker gracefully
+					go func() {
+						finailizer()
+						close(donec)
+					}()
+				} else {
+					// Abort the program when user hits Ctrl+C second time in a row
+					logger.Info("Force exit")
+					close(donec)
+				}
+			}
+		}
+	}()
+
+	<-donec
+	logger.Info("Quit")
+}

pkg/data/translit.go

+package data
+
+import (
+	"bytes"
+	"strings"
+	"unicode"
+)
+
+var mapRuEn = map[rune]string{
+	'а': "a", 'б': "b", 'в': "v", 'г': "g", 'д': "d", 'е': "e", 'ё': "yo", 'ж': "zh", 'з': "z", 'и': "i", 'й': "j",
+	'к': "k", 'л': "l", 'м': "m", 'н': "n", 'о': "o", 'п': "p", 'р': "r", 'с': "s", 'т': "t", 'у': "u", 'ф': "f",
+	'х': "h", 'ц': "c", 'ч': "ch", 'ш': "sh", 'щ': "shh", 'ъ': "", 'ы': "y", 'ь': "", 'э': "e", 'я': "ya",
+}
+
+func mapSpecial(r rune) rune {
+	if r <= unicode.MaxASCII && (unicode.IsLetter(r) || unicode.IsNumber(r) || r == ':' || r == '/') {
+		return r
+	}
+	return '-'
+}
+
+func StringTransform(s string, lowercase bool) string {
+	s = TableEncode(s, mapRuEn)
+	s = strings.Map(mapSpecial, s)
+	if lowercase {
+		s = strings.ToLower(s)
+	}
+	return s
+}
+
+func TableEncode(s string, tlm map[rune]string) string {
+	in := bytes.NewBufferString(s)
+	out := bytes.NewBuffer(nil)
+
+	for {
+		r, _, err := in.ReadRune()
+		if err != nil {
+			break // EOF
+		}
+
+		tr, ok := tlm[unicode.ToLower(r)]
+		if !ok {
+			out.WriteRune(r)
+			continue
+		}
+
+		if unicode.IsUpper(r) {
+			tr = strings.Title(tr)
+		}
+
+		out.WriteString(tr)
+	}
+	return out.String()
+}

pkg/data/translit_test.go

+package data
+
+import (
+	"testing"
+)
+
+func TestTranslit(t *testing.T) {
+	type args struct {
+		s         string
+		lowercase bool
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "test translit cyrillic",
+			args: args{"Ёжик 2019", true},
+			want: "yozhik-2019",
+		},
+		{
+			name: "test translit cyrillic",
+			args: args{"Ёжик", false},
+			want: "Yozhik",
+		},
+		{
+			name: "test translit english",
+			args: args{"Hello world,sample", true},
+			want: "hello-world-sample",
+		},
+		{
+			name: "test translit english",
+			args: args{"Специальные...символы", true},
+			want: "specialnye---simvoly",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := StringTransform(tt.args.s, tt.args.lowercase); got != tt.want {
+				t.Errorf("Translit() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

pkg/files/downloader.go

 package files
 
 import (
+	"encoding/base64"
 	"errors"
 	"io"
 	"net/http"
@@ -30,3 +31,26 @@ func (d *downloader) Download(dst io.Writer, file *File) error {
 	_, err = io.Copy(dst, r.Body)
 	return err
 }
+
+type noopDownloader struct{}
+
+func NewNoopDownloader() Downloader {
+	return &noopDownloader{}
+}
+
+func (d *noopDownloader) Download(dst io.Writer, file *File) error {
+	return nil
+}
+
+type dummyDownloader struct{}
+
+func NewDummyDownloader() Downloader {
+	return &dummyDownloader{}
+}
+
+func (d *dummyDownloader) Download(dst io.Writer, file *File) error {
+	// png pixel 10x10
+	pixel, err := base64.StdEncoding.DecodeString("iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAFUlEQVR42mNkYPhfz0AEYBxVSF+FAP5FDvcfRYWgAAAAAElFTkSuQmCC")
+	_, err = dst.Write(pixel)
+	return err
+}