Implement scoping on be (#144)

server/src/auth/guards/jwt.auth.guard.ts

@@ -1,5 +1,41 @@
-import { Injectable } from '@nestjs/common';
-import { AuthGuard } from '@nestjs/passport';
+import {
+  CanActivate,
+  ExecutionContext,
+  Injectable,
+  UnauthorizedException,
+} from '@nestjs/common';
+import { JwtService } from '@nestjs/jwt';
+import { GqlExecutionContext } from '@nestjs/graphql';
+import { Request } from 'express';
+import { ConfigService } from '@nestjs/config';
 
 @Injectable()
-export class JwtAuthGuard extends AuthGuard('jwt') {}
+export class JwtAuthGuard implements CanActivate {
+  constructor(
+    private jwtService: JwtService,
+    private configService: ConfigService,
+  ) {}
+
+  async canActivate(context: ExecutionContext): Promise<boolean> {
+    const gqlContext = GqlExecutionContext.create(context);
+    const request = gqlContext.getContext().req;
+    const token = this.extractTokenFromHeader(request);
+    if (!token) {
+      throw new UnauthorizedException();
+    }
+    try {
+      const payload = await this.jwtService.verifyAsync(token, {
+        secret: this.configService.get('JWT_SECRET'),
+      });
+      request['user'] = payload;
+    } catch (exception) {
+      throw new UnauthorizedException();
+    }
+    return true;
+  }
+
+  private extractTokenFromHeader(request: Request): string | undefined {
+    const [type, token] = request.headers.authorization?.split(' ') ?? [];
+    return type === 'Bearer' ? token : undefined;
+  }
+}