Very basic nextage support (for now).

gitadora@asphyxia/data/.gitignore

@@ -1,5 +1,7 @@
 mdb_ex.xml
 mdb_mt.xml
+mdb_nt.xml
 mdb_ex.b64
 mdb_mt.b64
+mdb.nt.b64
 custom_mdb.xml

gitadora@asphyxia/data/Nextage.ts

@@ -0,0 +1,58 @@
+import { CommonMusicData, readJSONOrXML, readXML } from './helper';
+
+export async function processData() {
+  const { music } = await readJSONOrXML('data/mdb_nt.json', 'data/mdb_nt.xml', processRawData)
+  return {
+    music,
+  };
+}
+
+export async function processRawData(path: string): Promise<CommonMusicData> {
+  const data = await readXML(path)
+  const mdb = $(data).elements("mdb.mdb_data");
+  const music: any[] = [];
+  for (const m of mdb) {
+    const d = m.numbers("xg_diff_list");
+    const contain = m.numbers("contain_stat");
+    const gf = contain[0];
+    const dm = contain[1];
+
+    if (gf == 0 && dm == 0) {
+      continue;
+    }
+
+    let type = gf;
+    if (gf == 0) {
+      type = dm;
+    }
+
+    music.push({
+      id: K.ITEM('s32', m.number("music_id")),
+      cont_gf: K.ITEM('bool', gf == 0 ? 0 : 1),
+      cont_dm: K.ITEM('bool', dm == 0 ? 0 : 1),
+      is_secret: K.ITEM('bool', 0),
+      is_hot: K.ITEM('bool', type == 2 ? 0 : 1),
+      data_ver: K.ITEM('s32', m.number("data_ver")),
+      diff: K.ARRAY('u16', [
+        d[0],
+        d[1],
+        d[2],
+        d[3],
+        d[4],
+        d[10],
+        d[11],
+        d[12],
+        d[13],
+        d[14],
+        d[5],
+        d[6],
+        d[7],
+        d[8],
+        d[9],
+      ]),
+    });
+  }
+  return {
+    music,
+  };
+}