Rankingコマンドを実装

src/commands/ranking.js

@@ -1,3 +1,19 @@
-module.exports = (client, message, db) => {
-  message.channel.send("工事中です。");
+module.exports = async (client, message, db) => {
+  const channels = db.getRanking();
+  const servers = {};
+  for (const channel of channels) {
+    const c = client.channel.get(channel.channel_id);
+    if (!c) continue;
+    const server = c.server;
+    if (!servers[server.id])
+      servers[server.id] = [server.name, channel.boss_level];
+    if (servers.length > 9) break;
+  }
+  await message.channel
+    .send(
+      `\`\`\`上位10サーバーのランキング\n${Object.entries(
+        Object.values(servers)
+      ).map((i, a) => `${i + 1}位：${a[0]} (Lv${a[1]})`)}\`\`\``
+    )
+    .join("\n");
 };

src/db.js

@@ -7,6 +7,11 @@ db.promiseAll = util.promisify(db.all);
 db.promiseGet = util.promisify(db.get);
 db.promiseRun = util.promisify(db.run);
 
+db.getRanking = () =>
+  db.promiseAll(
+    "SELECT channel_id, boss_level FROM channel_status ORDER BY boss_level DESC"
+  );
+
 db.getPlayerExp = async userId => {
   const player = await db.promiseGet(
     "SELECT experience FROM player WHERE user_id=?",
@@ -36,7 +41,7 @@ db.getPlayerRank = async userId => {
   const { rank } = await db.promiseGet(
     `SELECT (
         SELECT Count(0) FROM player WHERE player.experience > player1.experience
-        ) + 1 AS rank 
+        ) + 1 AS rank
         FROM player AS player1 WHERE user_id=?`,
     [userId]
   );