Move ID3 Writer to Util

src/decrypt/util.js

@@ -1,3 +1,4 @@
+const ID3Writer = require("browser-id3-writer");
 export const FLAC_HEADER = [0x66, 0x4C, 0x61, 0x43];
 export const MP3_HEADER = [0x49, 0x44, 0x33];
 export const OGG_HEADER = [0x4F, 0x67, 0x67, 0x53];
@@ -38,7 +39,7 @@ export function GetFileInfo(artist, title, filenameNoExt) {
 /**
  * @return {string}
  */
-export function GetCoverURL(metadata) {
+export function GetMetaCoverURL(metadata) {
     let pic_url = "";
     if (metadata.common.picture !== undefined && metadata.common.picture.length > 0) {
         let pic = new Blob([metadata.common.picture[0].data], {type: metadata.common.picture[0].format});
@@ -61,6 +62,56 @@ export function DetectAudioExt(data, fallbackExt) {
     if (IsBytesEqual(MP3_HEADER, data.slice(0, MP3_HEADER.length))) return "mp3";
     if (IsBytesEqual(FLAC_HEADER, data.slice(0, FLAC_HEADER.length))) return "flac";
     if (IsBytesEqual(OGG_HEADER, data.slice(0, OGG_HEADER.length))) return "ogg";
-    if (IsBytesEqual(M4A_HEADER, data.slice(4, 8))) return "m4a";
+    if (IsBytesEqual(M4A_HEADER, data.slice(4, 4 + M4A_HEADER.length))) return "m4a";
     return fallbackExt;
 }
+
+
+export async function GetWebImage(pic_url) {
+    try {
+        let resp = await fetch(pic_url);
+        let mime = resp.headers.get("Content-Type");
+        if (mime.startsWith("image/")) {
+            let buf = await resp.arrayBuffer();
+            let objBlob = new Blob([buf], {type: mime});
+            let objUrl = URL.createObjectURL(objBlob);
+            return {"buffer": buf, "url": objUrl, "type": mime};
+        }
+    } catch (e) {
+    }
+    return {"buffer": null, "url": "", "type": ""}
+}
+
+export async function WriteMp3Meta(audioData, artistList, title, album, pictureData = null, pictureDesc = "Cover") {
+    const writer = new ID3Writer(audioData);
+    writer.setFrame("TPE1", artistList)
+        .setFrame("TIT2", title)
+        .setFrame("TALB", album);
+    if (pictureData !== null) {
+        writer.setFrame('APIC', {
+            type: 3,
+            data: pictureData,
+            description: pictureDesc,
+        })
+    }
+    writer.addTag();
+    return writer.arrayBuffer;
+}
+
+export function RequestJsonp(url, callback_name = "callback") {
+    return new Promise((resolve, reject) => {
+        let node;
+        window[callback_name] = function (data) {
+            delete window[callback_name];
+            if (node.parentNode) node.parentNode.removeChild(node);
+            resolve(data)
+        };
+        node = document.createElement('script');
+        node.type = "text/javascript";
+        node.src = url;
+        node.addEventListener('error', msg => {
+            reject(msg);
+        });
+        document.head.appendChild(node);
+    });
+}