refactor(v4.0.0-alpha): beginning of a new era

apps/server/src/auth/strategy/github.strategy.ts

@@ -0,0 +1,61 @@
+import { BadRequestException, Injectable, UnauthorizedException } from "@nestjs/common";
+import { PassportStrategy } from "@nestjs/passport";
+import { User } from "@prisma/client";
+import { processUsername } from "@reactive-resume/utils";
+import { Profile, Strategy, StrategyOptions } from "passport-github2";
+
+import { ErrorMessage } from "@/server/constants/error-message";
+import { UserService } from "@/server/user/user.service";
+
+@Injectable()
+export class GitHubStrategy extends PassportStrategy(Strategy, "github") {
+  constructor(
+    readonly clientID: string,
+    readonly clientSecret: string,
+    readonly callbackURL: string,
+    private readonly userService: UserService,
+  ) {
+    super({ clientID, clientSecret, callbackURL, scope: ["user:email"] } as StrategyOptions);
+  }
+
+  async validate(
+    _accessToken: string,
+    _refreshToken: string,
+    profile: Profile,
+    done: (err?: string | Error | null, user?: Express.User, info?: unknown) => void,
+  ) {
+    const { displayName, emails, photos, username } = profile;
+
+    const email = emails?.[0].value ?? `${username}@github.com`;
+    const picture = photos?.[0].value;
+
+    let user: User | null = null;
+
+    if (!email) throw new BadRequestException();
+
+    try {
+      const user = await this.userService.findOneByIdentifier(email);
+
+      if (!user) throw new UnauthorizedException();
+
+      done(null, user);
+    } catch (error) {
+      try {
+        user = await this.userService.create({
+          email,
+          picture,
+          language: "en",
+          name: displayName,
+          provider: "github",
+          emailVerified: true, // auto-verify emails
+          username: processUsername(username ?? email.split("@")[0]),
+          secrets: { create: {} },
+        });
+
+        done(null, user);
+      } catch (error) {
+        throw new BadRequestException(ErrorMessage.UserAlreadyExists);
+      }
+    }
+  }
+}