From 1f16903aa104669ebbdec1c96e694cf6ec18d3cb Mon Sep 17 00:00:00 2001
From: spacemeowx2 <spacemeowx2@gmail.com>
Date: Sat, 22 Oct 2022 18:40:20 +0800
Subject: [PATCH] feat: add user prefix to file exporter

---
 src/exporters/file.ts | 14 ++++----------
 src/utils.ts          | 23 +++++++++++++++++++++++
 2 files changed, 27 insertions(+), 10 deletions(-)

diff --git a/src/exporters/file.ts b/src/exporters/file.ts
index c6f96d9..2af9b87 100644
--- a/src/exporters/file.ts
+++ b/src/exporters/file.ts
@@ -1,6 +1,7 @@
 import { BattleExporter, VsBattle } from "../types.ts";
-import { base64, path } from "../../deps.ts";
+import { path } from "../../deps.ts";
 import { NSOAPP_VERSION, S3SI_VERSION } from "../constant.ts";
+import { parseVsHistoryDetailId } from "../utils.ts";
 
 export type FileExporterType = {
   type: "VS" | "COOP";
@@ -30,16 +31,9 @@ export class FileExporter implements BattleExporter<VsBattle> {
   constructor(private exportPath: string) {
   }
   getFilenameById(id: string) {
-    const fullId = base64.decode(id);
-    const ts = new TextDecoder().decode(
-      fullId.slice(fullId.length - 52, fullId.length - 37),
-    );
+    const { uid, timestamp } = parseVsHistoryDetailId(id);
 
-    if (!/\d{8}T\d{6}/.test(ts)) {
-      throw new Error("Invalid battle ID");
-    }
-
-    return `${ts}Z.json`;
+    return `${uid}_${timestamp}Z.json`;
   }
   async exportBattle(battle: VsBattle) {
     await Deno.mkdir(this.exportPath, { recursive: true });
diff --git a/src/utils.ts b/src/utils.ts
index c5cfdf2..ae0eff1 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -82,6 +82,11 @@ export async function showError(p: Promise<void>) {
   }
 }
 
+/**
+ * @param id id of VeVsHistoryDetail
+ * @param namespace uuid namespace
+ * @returns
+ */
 export function battleId(
   id: string,
   namespace = S3SI_NAMESPACE,
@@ -90,3 +95,21 @@ export function battleId(
   const tsUuid = fullId.slice(fullId.length - 52, fullId.length);
   return uuid.v5.generate(namespace, tsUuid);
 }
+
+export function parseVsHistoryDetailId(id: string) {
+  const plainText = new TextDecoder().decode(base64.decode(id));
+
+  const re = /VsHistoryDetail-([a-z0-9-]+):(\w+):(\d{8}T\d{6})_([0-9a-f-]{36})/;
+  if (!re.test(plainText)) {
+    throw new Error(`Invalid battle ID: ${plainText}`);
+  }
+
+  const [, uid, listType, timestamp, uuid] = plainText.match(re)!;
+
+  return {
+    uid,
+    listType,
+    timestamp,
+    uuid,
+  };
+}