Create README.md

README.md

@@ -0,0 +1,42 @@
+# YT Playlist Features
+
+YouTube のプレイリストページに、ソート・フィルター付きのデータテーブルを追加するブラウザ拡張機能です。
+
+## 機能
+
+- **プレイリスト全件抽出** — ページネーションを自動処理し、すべての動画を取得
+- **インタラクティブなテーブル表示** — タイトル・チャンネル・再生時間などをカラムごとにソート
+- **フィルター** — タイトルのテキスト検索、チャンネル・追加者のタグベースのマルチセレクト（オートコンプリート付き）
+- **共同編集プレイリスト対応** — 追加者名・投票数の表示とフィルター
+- **ライブ配信バッジ** — ライブ中の動画を視覚的に識別
+- **ダークモード対応** — YouTube のテーマに追従
+- **多言語対応** — 日本語 / 英語（YouTube の言語設定に自動追従）
+
+## 対応ブラウザ
+
+| ブラウザ          | 対応状況              |
+| ----------------- | --------------------- |
+| Chrome / Chromium | Manifest V3           |
+| Firefox           | Manifest V3 (v133.0+) |
+
+## インストール（開発版）
+
+### Chrome
+
+1. `chrome://extensions` を開く
+2. 「デベロッパー モード」を有効にする
+3. 「パッケージ化されていない拡張機能を読み込む」から `dist/chrome` を選択
+
+### Firefox
+
+1. `about:debugging#/runtime/this-firefox` を開く
+2. 「一時的なアドオンを読み込む」から `dist/firefox/manifest.json` を選択
+
+## 使い方
+
+1. YouTube のプレイリストページ (`youtube.com/playlist?list=...`) にアクセス
+2. プレイリストの上部にテーブルが自動で表示される
+
+## ライセンス
+
+MIT

manifest.chrome.json

@@ -3,7 +3,7 @@
   "name": "YT Playlist Features",
   "version": "0.1.0",
   "description": "Extract and work with YouTube playlist data",
-  "permissions": ["storage"],
+  "permissions": [],
   "background": {
     "service_worker": "background/service-worker.js"
   },

manifest.firefox.json

@@ -3,7 +3,7 @@
   "name": "YT Playlist Features",
   "version": "0.1.0",
   "description": "Extract and work with YouTube playlist data",
-  "permissions": ["storage"],
+  "permissions": [],
   "background": {
     "scripts": ["background/service-worker.js"]
   },

src/background/service-worker.ts

@@ -1,6 +1,5 @@
 import browser from "webextension-polyfill";
 import type { Message } from "../shared/messages";
-import { savePlaylist, getPlaylist } from "../shared/storage";
 
 const LOG_PREFIX = "[yt-playlist-features:bg]";
 
@@ -11,15 +10,8 @@ browser.runtime.onMessage.addListener(
     if (msg.type === "PLAYLIST_EXTRACTED") {
       console.log(
         LOG_PREFIX,
-        `Saving playlist: "${msg.data.metadata.title}" (${msg.data.extractedCount} videos)`,
+        `Playlist: "${msg.data.metadata.title}" (${msg.data.extractedCount} videos)`,
       );
-      await savePlaylist(msg.data);
-      return;
-    }
-
-    if (msg.type === "GET_PLAYLIST") {
-      const data = await getPlaylist(msg.playlistId);
-      return { type: "PLAYLIST_RESPONSE", data } satisfies Message;
     }
   },
 );

src/content/ui/i18n.ts

@@ -0,0 +1,52 @@
+type MessageKey =
+  | "colIndex"
+  | "colTitle"
+  | "colChannel"
+  | "colDuration"
+  | "colAddedBy"
+  | "colVotes"
+  | "filterTitle"
+  | "filterChannel"
+  | "filterAddedBy"
+  | "badgeLive"
+  | "headerVideos";
+
+const messages: Record<string, Record<MessageKey, string>> = {
+  ja: {
+    colIndex: "#",
+    colTitle: "タイトル",
+    colChannel: "チャンネル",
+    colDuration: "長さ",
+    colAddedBy: "追加者",
+    colVotes: "投票",
+    filterTitle: "タイトル検索...",
+    filterChannel: "チャンネル...",
+    filterAddedBy: "追加者...",
+    badgeLive: "ライブ",
+    headerVideos: "本の動画",
+  },
+  en: {
+    colIndex: "#",
+    colTitle: "Title",
+    colChannel: "Channel",
+    colDuration: "Duration",
+    colAddedBy: "Added by",
+    colVotes: "Votes",
+    filterTitle: "Search title...",
+    filterChannel: "Channel...",
+    filterAddedBy: "Added by...",
+    badgeLive: "LIVE",
+    headerVideos: "videos",
+  },
+};
+
+function detectLang(): string {
+  const htmlLang = document.documentElement.lang;
+  if (htmlLang?.startsWith("ja")) return "ja";
+  return "en";
+}
+
+export function t(key: MessageKey): string {
+  const lang = detectLang();
+  return (messages[lang] ?? messages.en)[key];
+}

src/content/ui/table-renderer.ts

@@ -1,4 +1,5 @@
 import type { PlaylistData, PlaylistVideo } from "../../types/playlist";
+import { t } from "./i18n";
 
 type SortKey = "index" | "title" | "channel" | "duration" | "addedBy" | "votes";
 type SortDir = "asc" | "desc";
@@ -10,14 +11,16 @@ interface Column {
   collab?: boolean; // only shown for collaborative playlists
 }
 
-const allColumns: Column[] = [
+function getAllColumns(): Column[] {
-  { label: "#", cls: "ytpf-col-index", key: "index" },
+  return [
-  { label: "Title", cls: "ytpf-col-title", key: "title" },
+    { label: t("colIndex"), cls: "ytpf-col-index", key: "index" },
-  { label: "Channel", cls: "ytpf-col-channel", key: "channel" },
+    { label: t("colTitle"), cls: "ytpf-col-title", key: "title" },
-  { label: "Duration", cls: "ytpf-col-duration", key: "duration" },
+    { label: t("colChannel"), cls: "ytpf-col-channel", key: "channel" },
-  { label: "Added by", cls: "ytpf-col-addedby", key: "addedBy", collab: true },
+    { label: t("colDuration"), cls: "ytpf-col-duration", key: "duration" },
-  { label: "Votes", cls: "ytpf-col-votes", key: "votes", collab: true },
+    { label: t("colAddedBy"), cls: "ytpf-col-addedby", key: "addedBy", collab: true },
+    { label: t("colVotes"), cls: "ytpf-col-votes", key: "votes", collab: true },
   ];
+}
 
 interface TagInput {
   container: HTMLElement;
@@ -251,7 +254,7 @@ function buildRow(
   if (video.isLive) {
     const badge = document.createElement("span");
     badge.className = "ytpf-live";
-    badge.textContent = "LIVE";
+    badge.textContent = t("badgeLive");
     tdDuration.appendChild(badge);
   } else {
     tdDuration.textContent = video.durationText ?? "--";
@@ -279,7 +282,7 @@ export function renderPlaylistTable(data: PlaylistData): HTMLElement {
   const isCollab = data.videos.some(
     (v) => v.addedBy != null || v.voteCount != null,
   );
-  const columns = allColumns.filter((c) => !c.collab || isCollab);
+  const columns = getAllColumns().filter((c) => !c.collab || isCollab);
 
   const wrapper = document.createElement("div");
   wrapper.className = "ytpf-wrapper";
@@ -290,7 +293,7 @@ export function renderPlaylistTable(data: PlaylistData): HTMLElement {
 
   const titleSpan = document.createElement("span");
   titleSpan.className = "ytpf-header-title";
-  titleSpan.textContent = `${data.metadata.title} — ${data.extractedCount} videos`;
+  titleSpan.textContent = `${data.metadata.title} — ${data.extractedCount} ${t("headerVideos")}`;
 
   const metaSpan = document.createElement("span");
   metaSpan.className = "ytpf-header-meta";
@@ -313,12 +316,12 @@ export function renderPlaylistTable(data: PlaylistData): HTMLElement {
   titleInput.className = "ytpf-filter-input";
   titleInput.type = "text";
   titleInput.name = "ytpf-title-filter";
-  titleInput.placeholder = "タイトル検索...";
+  titleInput.placeholder = t("filterTitle");
   filters.appendChild(titleInput);
 
   // Channel tag input
   const channelNames = [...new Set(data.videos.map((v) => v.channel.name))].sort();
-  const channelTagInput = createTagInput("チャンネル...", channelNames, () => applyFilters());
+  const channelTagInput = createTagInput(t("filterChannel"), channelNames, () => applyFilters());
   filters.appendChild(channelTagInput.container);
 
   // Added-by tag input (collab only)
@@ -327,7 +330,7 @@ export function renderPlaylistTable(data: PlaylistData): HTMLElement {
     const addedByNames = [...new Set(
       data.videos.map((v) => v.addedBy).filter((n): n is string => n != null),
     )].sort();
-    addedByTagInput = createTagInput("追加者...", addedByNames, () => applyFilters());
+    addedByTagInput = createTagInput(t("filterAddedBy"), addedByNames, () => applyFilters());
     filters.appendChild(addedByTagInput.container);
   }
 

src/shared/messages.ts

@@ -1,6 +1,3 @@
 import type { PlaylistData } from "../types/playlist";
 
-export type Message =
+export type Message = { type: "PLAYLIST_EXTRACTED"; data: PlaylistData };
-  | { type: "PLAYLIST_EXTRACTED"; data: PlaylistData }
-  | { type: "GET_PLAYLIST"; playlistId: string }
-  | { type: "PLAYLIST_RESPONSE"; data: PlaylistData | null };

src/shared/storage.ts

@@ -1,25 +0,0 @@
-import browser from "webextension-polyfill";
-import type { PlaylistData } from "../types/playlist";
-
-const STORAGE_PREFIX = "playlist:";
-
-export async function savePlaylist(data: PlaylistData): Promise<void> {
-  await browser.storage.local.set({
-    [STORAGE_PREFIX + data.metadata.playlistId]: data,
-  });
-}
-
-export async function getPlaylist(
-  playlistId: string,
-): Promise<PlaylistData | null> {
-  const key = STORAGE_PREFIX + playlistId;
-  const result = await browser.storage.local.get(key);
-  return (result[key] as PlaylistData) ?? null;
-}
-
-export async function getAllPlaylists(): Promise<PlaylistData[]> {
-  const all = await browser.storage.local.get(null);
-  return Object.entries(all)
-    .filter(([key]) => key.startsWith(STORAGE_PREFIX))
-    .map(([, value]) => value as PlaylistData);
-}