From 9dd45558ec17da6824ad17c46dcfe4645e3e3d88 Mon Sep 17 00:00:00 2001
From: Tau <tau@nowhere>
Date: Thu, 23 May 2019 13:54:29 -0400
Subject: [PATCH] aimedb: Stub a FeliCa lookup response

---
 src/aimedb/decoder.ts  | 10 ++++++++++
 src/aimedb/encoder.ts  | 10 ++++++++++
 src/aimedb/handler.ts  | 17 +++++++++++++++++
 src/aimedb/request.ts  |  7 +++++++
 src/aimedb/response.ts |  6 ++++++
 5 files changed, 50 insertions(+)

diff --git a/src/aimedb/decoder.ts b/src/aimedb/decoder.ts
index e6ae581..d0776a1 100644
--- a/src/aimedb/decoder.ts
+++ b/src/aimedb/decoder.ts
@@ -19,6 +19,15 @@ function readRegisterRequest(msg: Buffer): Request.RegisterRequest {
   };
 }
 
+function readFeliCaLookupRequest(msg: Buffer): Request.FeliCaLookupRequest {
+  return {
+    ...begin(msg),
+    type: "felica_lookup",
+    idm: msg.slice(0x0020, 0x0028).toString("hex"),
+    pmm: msg.slice(0x0028, 0x0030).toString("hex"),
+  };
+}
+
 function readLogRequest(msg: Buffer): Request.LogRequest {
   // idk what any of this stuff means yet
   // field20 and field28 appear to be an aime id but that is all.
@@ -79,6 +88,7 @@ function readGoodbyeRequest(msg: Buffer): Request.GoodbyeRequest {
 
 const readers = new Map<number, (msg: Buffer) => Request.AimeRequest>();
 
+readers.set(0x0001, readFeliCaLookupRequest);
 readers.set(0x0004, readLookupRequest);
 readers.set(0x0005, readRegisterRequest);
 readers.set(0x0009, readLogRequest);
diff --git a/src/aimedb/encoder.ts b/src/aimedb/encoder.ts
index 21b849a..42599b3 100644
--- a/src/aimedb/encoder.ts
+++ b/src/aimedb/encoder.ts
@@ -32,6 +32,14 @@ export class Encoder extends Transform {
     let buf: Buffer;
 
     switch (msg.type) {
+      case "felica_lookup":
+        buf = begin(0x0030);
+        buf.writeUInt16LE(0x0003, 0x0004); // cmd code
+        buf.writeUInt16LE(msg.status, 0x0008);
+        buf.write(msg.accessCode, 0x0024, "hex");
+
+        break;
+
       case "hello":
         buf = begin(0x0020);
         buf.writeUInt16LE(0x0065, 0x0004); // cmd code
@@ -92,6 +100,8 @@ export class Encoder extends Transform {
         break;
 
       default:
+        const exhaust: never = msg;
+
         return callback(new Error("Unimplemented response type"));
     }
 
diff --git a/src/aimedb/handler.ts b/src/aimedb/handler.ts
index 9eee352..938d41c 100644
--- a/src/aimedb/handler.ts
+++ b/src/aimedb/handler.ts
@@ -22,6 +22,18 @@ function campaign(
   return { type: req.type, status: 1 };
 }
 
+function feliCaLookup(
+  rep: Repositories,
+  req: Req.FeliCaLookupRequest,
+  now: Date
+): Res.FeliCaLookupResponse {
+  console.log("Aimedb: FeliCa access code lookup");
+
+  // Well, this access code transformation is the million dollar question eh
+
+  return { type: req.type, status: 1, accessCode: "00010203040506070809" };
+}
+
 async function lookup(
   rep: Repositories,
   req: Req.LookupRequest,
@@ -88,6 +100,9 @@ export async function dispatch(
     case "campaign":
       return campaign(rep, req, now);
 
+    case "felica_lookup":
+      return feliCaLookup(rep, req, now);
+
     case "lookup":
       return lookup(rep, req, now);
 
@@ -106,6 +121,8 @@ export async function dispatch(
       return undefined;
 
     default:
+      const exhaust: never = req;
+
       throw new Error("Aimedb: Handler not implemented!");
   }
 }
diff --git a/src/aimedb/request.ts b/src/aimedb/request.ts
index 79deef3..8d2072d 100644
--- a/src/aimedb/request.ts
+++ b/src/aimedb/request.ts
@@ -3,6 +3,12 @@ export interface AimeRequestBase {
   keychipId: string;
 }
 
+export interface FeliCaLookupRequest extends AimeRequestBase {
+  type: "felica_lookup";
+  idm: string;
+  pmm: string;
+}
+
 export interface RegisterRequest extends AimeRequestBase {
   type: "register";
   luid: string;
@@ -43,6 +49,7 @@ export interface GoodbyeRequest {
 }
 
 export type AimeRequest =
+  | FeliCaLookupRequest
   | CampaignRequest
   | GoodbyeRequest
   | HelloRequest
diff --git a/src/aimedb/response.ts b/src/aimedb/response.ts
index c201f98..9863cb5 100644
--- a/src/aimedb/response.ts
+++ b/src/aimedb/response.ts
@@ -6,6 +6,11 @@ export interface AimeResponseBase {
   status: number;
 }
 
+export interface FeliCaLookupResponse extends AimeResponseBase {
+  type: "felica_lookup";
+  accessCode: string;
+}
+
 export interface CampaignResponse extends AimeResponseBase {
   type: "campaign";
 }
@@ -38,6 +43,7 @@ export interface RegisterResponse extends AimeResponseBase {
 }
 
 export type AimeResponse =
+  | FeliCaLookupResponse
   | CampaignResponse
   | HelloResponse
   | LogResponse