[core] Add captcha API endpoints

src/api/auth.controller.ts

@@ -12,6 +12,7 @@ import { ApiOperation, ApiSecurity, ApiTags } from '@nestjs/swagger';
 import { SessionManager } from '../core/abc/manager.abc';
 import { WhatsappSession } from '../core/abc/session.abc';
 import {
+  CaptchaBody,
   OTPRequest,
   QRCodeFormat,
   QRCodeQuery,
@@ -74,6 +75,30 @@ class AuthController {
   ) {
     return session.authorizeCode(request.code);
   }
+
+  @Get('captcha')
+  @SessionApiParam
+  @ApiFileAcceptHeader()
+  @UseInterceptors(new BufferResponseInterceptor())
+  @ApiOperation({
+    summary: 'Get captcha image.',
+  })
+  async getCaptcha(@SessionParam session: WhatsappSession): Promise<Buffer> {
+    const image = await session.getCaptcha();
+    return image.get();
+  }
+
+  @Post('captcha')
+  @SessionApiParam
+  @ApiOperation({
+    summary: 'Enter captcha code.',
+  })
+  saveCaptcha(
+    @SessionParam session: WhatsappSession,
+    @Body() body: CaptchaBody,
+  ) {
+    return session.saveCaptcha(body.code);
+  }
 }
 
 export { AuthController };

src/core/abc/session.abc.ts

@@ -213,6 +213,14 @@ export abstract class WhatsappSession {
     throw new NotImplementedByEngineError();
   }
 
+  public getCaptcha(): Promise<QR> {
+    throw new NotImplementedByEngineError();
+  }
+
+  public saveCaptcha(code: string) {
+    throw new NotImplementedByEngineError();
+  }
+
   /**
    * Other methods
    */

src/structures/auth.dto.ts

@@ -32,6 +32,10 @@ export class OTPRequest {
   code: string;
 }
 
+export class CaptchaBody {
+  code: string;
+}
+
 export class PairingCodeResponse {
   code: string;
 }