feature: 新增获取歌单所有歌曲的API

module/playlist_catlist.js

@@ -1,15 +1,3 @@
 // 全部歌单分类
 
-module.exports = (query, request) => {
-  return request(
-    'POST',
-    `https://music.163.com/weapi/playlist/catalogue`,
-    {},
-    {
-      crypto: 'weapi',
-      cookie: query.cookie,
-      proxy: query.proxy,
-      realIP: query.realIP,
-    },
-  )
-}
+module.exports = (query, request) => {}

module/playlist_track_all.js

@@ -0,0 +1,47 @@
+// 通过传过来的歌单id拿到所有歌曲数据
+// 支持传递参数limit来限制获取歌曲的数据数量 例如: /playlist/track/all?id=7044354223&limit=10
+
+module.exports = (query, request) => {
+  const data = {
+    id: query.id,
+    n: 100000,
+    s: query.s || 8,
+  }
+  //不放在data里面避免请求带上无用的数据
+  let limit = query.limit
+  let trackIds
+  let idsData = Object.create(null)
+
+  return request('POST', `https://music.163.com/api/v6/playlist/detail`, data, {
+    crypto: 'api',
+    cookie: query.cookie,
+    proxy: query.proxy,
+    realIP: query.realIP,
+  }).then((res) => {
+    const ids = []
+    let trackIds = res.body.playlist.trackIds
+    if (typeof limit === 'undefined') {
+      limit = trackIds.length
+    }
+    trackIds.forEach((item, index) => {
+      if (index < limit) {
+        ids.push(item.id)
+      }
+    })
+    idsData = {
+      c: '[' + ids.map((id) => '{"id":' + id + '}').join(',') + ']',
+    }
+
+    return request(
+      'POST',
+      `https://music.163.com/api/v3/song/detail`,
+      idsData,
+      {
+        crypto: 'weapi',
+        cookie: query.cookie,
+        proxy: query.proxy,
+        realIP: query.realIP,
+      },
+    )
+  })
+}