1 files changed, 57 insertions, 0 deletions
diff --git a/src/api/index.ts b/src/api/index.ts
new file mode 100644
index 0000000..c55bb21
--- /dev/null
+++ b/src/api/index.ts
@@ -0,0 +1,57 @@
+import express from 'express';
+import {
+  BotMoveRequest,
+  BotMoveAttempt,
+  BotMoveResponse,
+} from './Chessh';
+import axios from 'axios';
+import { aiMove } from 'js-chess-engine';
+
+const router = express.Router();
+
+const chesshMovePath = (gameId: number) =>
+  process.env.CHESSH_MOVE_PATH!.replace(
+    ':gameId',
+    gameId.toString(),
+  );
+
+const sendNextMove = (gameId: number, move: string): Promise<BotMoveResponse> =>
+  axios
+    .post(chesshMovePath(gameId), {
+      attempted_move: move.toLowerCase(),
+    } as BotMoveAttempt, {
+      headers: {
+        "authorization": process.env.BOT_TOKEN!
+      }
+    })
+    .then((r): BotMoveResponse => {
+      const body = r.data as BotMoveResponse;
+      if (r.status === 200) {
+        return body;
+      }
+      throw new Error(
+        'Move request unsuccessful, got back from cheSSH: ' +
+          JSON.stringify(body),
+      );
+    });
+
+router.post<BotMoveRequest, string>('/move', async (req, res) => {
+  const updateMessages: BotMoveRequest[] = Array.isArray(req.body)
+    ? req.body
+    : [req.body];
+
+  for (const update of updateMessages) {
+    if (update.bot_turn) {
+      const move = aiMove(update.fen, 3);
+
+      const moveFrom = Object.keys(move)[0];
+      const moveTo = move[moveFrom];
+
+      await sendNextMove(update.game_id, moveFrom + moveTo);
+    }
+  }
+
+  res.status(200).send('OK');
+});
+
+export default router;