优化captchaSession

Server/src/Plugs/Service/captchaSession.ts

@@ -1,18 +1,28 @@
+/**
+ * @file captchaSession.ts
+ * @version 1.0.0
+ * @description 旋转图像验证服务
+ */
 import Logger from '../Logger';
 import RedisConnection from '../RedisConnection';
+type CaptchaSessionDataJSON = {
+    rotateDeg: number,
+    tryCount: number,
+    isPassed: boolean
+}
 
 class _captchaSession {
-    private logger = new Logger('Service][captchaSession');
-    private AllowMaxTryCount: number = 5;
-    private AllowMaxAngleDiff: number = 8;
-    private ExpriedTimeSec: number = 60;
-    private RedisCommonKey: string = 'Service:captchaSession:';
+    private readonly logger = new Logger('Service][captchaSession');
+    private readonly AllowMaxTryCount: number = 5;
+    private readonly AllowMaxAngleDiff: number = 8;
+    private readonly ExpriedTimeSec: number = 60;
+    private readonly RedisCommonKey: string = 'Service:captchaSession:';
 
     constructor() {
         this.logger.info('旋转图像验证服务已启动');
     }
 
-    private async get(session: string) {
+    private async get(session: string): Promise<CaptchaSessionDataJSON | undefined> {
         try {
             const result = await RedisConnection.get(this.RedisCommonKey + session);
             if (result === null)
@@ -24,7 +34,7 @@ class _captchaSession {
         }
     }
 
-    private async remove(session: string) {
+    private async remove(session: string): Promise<void> {
         try {
             await RedisConnection.del(this.RedisCommonKey + session);
         } catch (error) {
@@ -39,7 +49,7 @@ class _captchaSession {
      * @returns true存储成功 false存储失败
      */
     public async add(session: string, rotateDeg: number): Promise<boolean> {
-        const result = {
+        const result: CaptchaSessionDataJSON = {
             rotateDeg: rotateDeg,
             tryCount: 0,
             isPassed: false