From cef46aa5f5b9cac5c43bd842ed64580357718e86 Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fischer@muhq.space>
Date: Sun, 21 May 2023 13:45:15 +0200
Subject: implement the upload backend

---
 .gitignore      |  1 +
 TODO            |  3 +++
 player.go       |  4 ++-
 upload.go       | 83 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 web/client.html | 19 +++++++++++++
 5 files changed, 109 insertions(+), 1 deletion(-)
 create mode 100644 upload.go

diff --git a/.gitignore b/.gitignore
index 9490ce8..f816994 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 wrms
+uploads
diff --git a/TODO b/TODO
index f9fc0b9..4e33df8 100644
--- a/TODO
+++ b/TODO
@@ -6,7 +6,10 @@
 
 ## Backends
 
+- [ ] Split paralyze search
 - [X] Implement local storage backend
+  - [X] Implement upload
+    - [ ] Remove uploaded songs after were played
 - [X] Fix youtube search
 
 ## Configuration
diff --git a/player.go b/player.go
index d5fe270..3cee6b4 100644
--- a/player.go
+++ b/player.go
@@ -28,7 +28,9 @@ func NewPlayer(wrms *Wrms, backends []string) Player {
 		case "dummy":
 			b = &DummyBackend{}
 		case "local":
-			b = NewLocalBackend(wrms.Config.localMusicDir)
+			b = NewLocalBackend(wrms.Config.LocalMusicDir)
+		case "upload":
+			b = NewUploadBackend(wrms.Config.UploadDir)
 		default:
 			llog.Error("Not supported backend %s", backend)
 		}
diff --git a/upload.go b/upload.go
new file mode 100644
index 0000000..d7bbd20
--- /dev/null
+++ b/upload.go
@@ -0,0 +1,83 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"net/http"
+	"os"
+	"path"
+	// "path/filepath"
+	"io/ioutil"
+
+	"github.com/dhowden/tag"
+	"muhq.space/go/wrms/llog"
+)
+
+type UploadBackend struct {
+	uploadDir string
+}
+
+func NewUploadBackend(uploadDir string) *UploadBackend {
+	b := UploadBackend{uploadDir: uploadDir}
+
+	dirInfo, err := os.Stat(uploadDir)
+
+	if os.IsNotExist(err) {
+		os.Mkdir(uploadDir, 0750)
+	} else if !dirInfo.IsDir() {
+		llog.Fatal("upload directory %s exists and is not a directory", uploadDir)
+	}
+
+	b.setupUploadRoute()
+
+	return &b
+}
+
+func (b *UploadBackend) upload(w http.ResponseWriter, r *http.Request) {
+	data, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		llog.Warning("Failed to read request body: %s", string(data))
+		http.Error(w, "Failed to read request body", http.StatusInternalServerError)
+		return
+	}
+
+	fileName := r.URL.Query().Get("song")
+
+	f, err := os.Create(path.Join(b.uploadDir, fileName))
+	if err != nil {
+		llog.Fatal("Failed to create uploaded song on disk")
+	}
+
+	_, err = f.Write(data)
+	if err != nil {
+		llog.Fatal("Failed to write uploaded song on disk")
+	}
+
+	f.Close()
+
+	var song Song
+	dataReader := bytes.NewReader(data)
+	m, err := tag.ReadFrom(dataReader)
+	if err != nil {
+		llog.Warning("error reading tags from %s: %v", fileName, err)
+		song = NewSong(fileName, "Unknown", "upload", fileName)
+	} else {
+		song = NewSong(m.Title(), m.Artist(), "upload", fileName)
+	}
+
+	wrms.AddSong(song)
+	wrms.Broadcast(Event{"add", []Song{song}})
+	fmt.Fprintf(w, "Added uploaded song %s", string(fileName))
+}
+
+func (b *UploadBackend) setupUploadRoute() {
+	http.HandleFunc("/upload", b.upload)
+}
+
+func (b *UploadBackend) Play(song *Song, player *Player) {
+	player.PlayUri("file://" + path.Join(b.uploadDir, song.Uri))
+}
+
+func (b *UploadBackend) Search(keyword string) []Song {
+	return nil
+}
diff --git a/web/client.html b/web/client.html
index 87ca51a..a330c00 100644
--- a/web/client.html
+++ b/web/client.html
@@ -237,6 +237,18 @@
         return false;
       }
 
+      {{if .HasUpload}}
+      function submitUpload() {
+        const form = new FormData(document.getElementById("uploadForm"));
+        const file = form.get("song");
+        const params = new URLSearchParams();
+        params.append("song", file.name);
+        const song = params.toString();
+        new HttpClient().post("/upload?" + song, file, console.log);
+        return false;
+      }
+      {{end}}
+
       function addSong(song) {
         new HttpClient().post("/add", JSON.stringify(song), console.log);
       }
@@ -282,6 +294,13 @@
         <input id="searchInput" name="pattern" type="text" value="Title/Artist/Album/...">
         <button id="searchButton">Search</button>
       </form>
+
+      {{if .HasUpload}}
+      <form id="uploadForm" onsubmit="return submitUpload()">
+        <input id="uploadInput" name="song" type="file">
+        <button id="uploadButton", type="submit">Upload</button>
+      </form>
+      {{end}}
     </div>
 
     <div id="searchResultsOverlay" style="display: none;">
-- 
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