Add cdr `preview` subcommand

This serves the mixtape site by running `cdr preview`

cmd/cdr/generate.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/thebaer/cdr"
+	"github.com/urfave/cli"
+)
+
+var (
+	cmdServe = cli.Command{
+		Name:   "preview",
+		Usage:  "serve the mixtape site",
+		Action: serveAction,
+	}
+)
+
+func newMixtape(wd string) (*cdr.Mixtape, error) {
+	m := &cdr.Mixtape{Tracks: []cdr.Track{}}
+
+	filepath.Walk(wd, func(path string, i os.FileInfo, err error) error {
+		if !i.IsDir() && !strings.HasPrefix(i.Name(), ".") && i.Name() != "index.html" {
+			t, err := cdr.NewTrack(i.Name())
+			if err == nil {
+				log.Printf("Skipping track %s: %v", i.Name(), err)
+				return nil
+			}
+			log.Println("Adding track", t.Title)
+			m.Tracks = append(m.Tracks, *t)
+		}
+
+		return nil
+	})
+	return m, nil
+}
+
+func serveAction(c *cli.Context) error {
+	wd, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+
+	m, err := newMixtape(wd)
+	if err != nil {
+		return err
+	}
+
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		if r.RequestURI != "/" {
+			log.Printf("GET %s", r.RequestURI)
+			http.ServeFile(w, r, filepath.Join(wd, r.RequestURI))
+			return
+		}
+		err := cdr.Render(m, w)
+		if err != nil {
+			log.Printf("[ERROR] Render failed! %s", err)
+		}
+		log.Printf("GET /")
+	})
+
+	return http.ListenAndServe(":9991", nil)
+}

cmd/cdr/main.go

@@ -16,6 +16,7 @@ func main() {
 	}
 
 	app.Commands = []*cli.Command{
+		&cmdServe,
 		&cmdClean,
 	}
 

render.go

@@ -0,0 +1,26 @@
+//go:generate inline -o templates.go -p cdr templates/parts.tmpl
+
+package cdr
+
+import (
+	"html/template"
+	"io"
+	"io/ioutil"
+)
+
+func Render(m *Mixtape, w io.Writer) error {
+	partsRawTmpl, err := ReadAsset("templates/parts.tmpl", false)
+	if err != nil {
+		return err
+	}
+	mixtapeRawTmpl, err := ioutil.ReadFile("mixtape.tmpl")
+	if err != nil {
+		return err
+	}
+	t, err := template.New("mixtape").Parse(string(mixtapeRawTmpl) + string(partsRawTmpl))
+	if err != nil {
+		return err
+	}
+	t.ExecuteTemplate(w, "mixtape", m)
+	return nil
+}

sanitize.go

@@ -13,17 +13,16 @@ import (
 
 var trackNameReg = regexp.MustCompile("^([0-9]{2}).+")
 
-func NewTrack(file string) *Track {
+func NewTrack(file string) (*Track, error) {
 	f, err := os.Open(file)
 	if err != nil {
-		fmt.Printf("error loading file: %v", err)
-		return nil
+		return nil, fmt.Errorf("error loading file: %v", err)
 	}
 	defer f.Close()
 
 	m, err := tag.ReadFrom(f)
 	if err != nil {
-		return nil
+		return nil, fmt.Errorf("unable to read file: %v", err)
 	}
 
 	return &Track{
@@ -36,7 +35,10 @@ func NewTrack(file string) *Track {
 // RenameTrack takes a filename, opens it, reads the metadata, and returns both
 // the old and new filename.
 func RenameTrack(file string) string {
-	t := NewTrack(file)
+	t, err := NewTrack(file)
+	if err != nil {
+		return ""
+	}
 
 	// Extract playlist track number from filename
 	fMatch := trackNameReg.FindStringSubmatch(t.Filename)

templates.go

@@ -0,0 +1,81 @@
+// Code generated by "inline -o templates.go -p cdr templates/parts.tmpl" -- DO NOT EDIT --
+
+package cdr
+
+import (
+	"fmt"
+	"io/ioutil"
+)
+
+func ReadAsset(file string, useLocal bool) ([]byte, error) {
+	if useLocal {
+		return ioutil.ReadFile(file)
+	}
+	if f, ok := files[file]; ok {
+		return []byte(f), nil
+	}
+	return nil, fmt.Errorf("file doesn't exist.")
+}
+
+var files = map[string]string{
+	"templates/parts.tmpl": `{{define "player"}}
+    {{with $x := index . 0}}
+    <audio id="player" preload="auto" tabindex="0" controls>
+        <source src="{{$x.Filename}}">
+    </audio>
+    {{end}}
+    <ol id="playlist">
+        {{range $i, $el := .}}
+        <li{{if eq $i 0}} class="active"{{end}}>
+            <a href="{{$el.Filename}}">{{$el.Artist}} - {{$el.Title}}</a>
+        </li>
+        {{end}}
+    </ol>
+{{end}}
+
+{{define "full-player"}}
+    {{template "player" .}}
+    {{template "playlist-js"}}
+{{end}}
+
+{{define "playlist-js"}}
+	<script src="https://code.jquery.com/jquery-3.4.1.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
+	<script type="text/javascript">
+        $(document).ready(function() {
+            init();
+
+            function init() {
+                var current = 0;
+                var $audio = $('#player');
+                var $playlist = $('#playlist');
+                var $tracks = $playlist.find('li a');
+                var len = $tracks.length - 1;
+                $playlist.on('click', 'a', function (e) {
+                    e.preventDefault();
+                    link = $(this);
+                    current = link.parent().index();
+                    run(link, $audio[0]);
+                });
+                $audio[0].addEventListener('ended', function (e) {
+                    current++;
+                    if (current == len) {
+                        current = 0;
+                        link = $playlist.find('a')[0];
+                    } else {
+                        link = $playlist.find('a')[current];
+                    }
+                    run($(link), $audio[0]);
+                });
+            }
+
+            function run($link, $player) {
+                $player.src = $link.attr('href');
+                par = $link.parent();
+                par.addClass('active').siblings().removeClass('active');
+                $player.load();
+                $player.play();
+            }
+        });
+	</script>
+{{end}}`,
+}