[ADD] google strategie

back/src/users/google.strategy.ts

@@ -0,0 +1,46 @@
+// users/google/google.strategy.ts
+
+import { PassportStrategy } from "@nestjs/passport";
+import { Strategy } from "passport-google-oauth20";
+import { Injectable, InternalServerErrorException } from "@nestjs/common";
+import { UsersService } from "./users.service";
+import { ConfigService } from "@nestjs/config";
+
+// La classe GoogleStrategy étend PassportStrategy et utilise la stratégie passport-google-oauth20
+@Injectable()
+export class GoogleStrategy extends PassportStrategy(Strategy, "google") {
+    constructor(
+        private readonly usersService: UsersService,
+        private readonly configService: ConfigService
+    ) {
+        // Initialize the Google OAuth2.0 strategy with the appropriate credentials
+        super({
+            clientID: configService.get("GOOGLE_CLIENT_ID"),
+            clientSecret: configService.get("GOOGLE_CLIENT_SECRET"),
+            callbackURL: configService.get("GOOGLE_CALLBACK_URL"),
+            scope: ["email", "profile"],
+        });
+    }
+
+    // The validate method is called by Passport after the user has been authenticated
+    async validate(
+        accessToken: string,
+        refreshToken: string,
+        profile: any,
+    ): Promise<any> {
+        try {
+            const { email, name, picture } = profile; // Extract the relevant information from the profile object
+            const user = await this.usersService.findOrCreate({
+                email: email[0].value,
+                firstName: name.givenName,
+                lastName: name.familyName,
+                picture: picture[0].value,
+                accessToken,
+            });
+            return user;
+        } catch (err) {
+            console.log(err);
+            throw new InternalServerErrorException();
+        }
+    }
+}