Add model serializer and coreid login provider

src/auth/provider/oauth/CoreIDLoginProvider.ts

@@ -0,0 +1,100 @@
+/* eslint camelcase: 0 */
+import {OAuth2LoginProvider, OAuth2LoginProviderConfig} from './OAuth2LoginProvider'
+import {Authenticatable} from '../../types'
+import {Request} from '../../../http/lifecycle/Request'
+import {ErrorWithContext, uuid4, fetch} from '../../../util'
+
+/**
+ * OAuth2LoginProvider implementation that authenticates users against a
+ * Starship CoreID server.
+ */
+export class CoreIDLoginProvider extends OAuth2LoginProvider<OAuth2LoginProviderConfig> {
+    protected async callback(request: Request): Promise<Authenticatable> {
+        // Get authentication_code from the request
+        const code = String(request.input('code') || '')
+        if ( !code ) {
+            throw new ErrorWithContext('Unable to authenticate user: missing login code', {
+                input: request.input(),
+            })
+        }
+
+        // Get OAuth2 token from CoreID
+        const token = await this.getToken(code)
+
+        // Get user from endpoint
+        const userData = await this.getUserData(token)
+
+        // Return authenticatable instance
+        const existing = await this.security.repository.getByIdentifier(userData.uid)
+        if ( existing ) {
+            this.updateUser(existing, userData)
+            return existing
+        }
+
+        const user = await this.security.repository.createFromCredentials(userData.uid, uuid4())
+        this.updateUser(user, userData)
+        return user
+    }
+
+    /** Given an access token, look up the associated user's information. */
+    protected async getUserData(token: string): Promise<any> {
+        const userResponse = await fetch(
+            this.config.userUrl,
+            {
+                method: 'GET',
+                headers: {
+                    Authorization: `Bearer ${token}`,
+                },
+            },
+        )
+
+        const userData: any = await userResponse.json()
+        if ( !userData?.data?.uid ) {
+            throw new ErrorWithContext('Unable to extract user from response', {
+                userData,
+            })
+        }
+
+        return userData.data
+    }
+
+    /** Given a login code, redeem it for an access token. */
+    protected async getToken(code: string): Promise<string> {
+        const body: string[] = [
+            'code=' + encodeURIComponent(code),
+            'client_id=' + encodeURIComponent(this.config.clientId),
+            'client_secret=' + encodeURIComponent(this.config.clientSecret),
+            'grant_type=authorization_code',
+        ]
+
+        const response = await fetch(
+            this.config.tokenUrl,
+            {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/x-www-form-urlencoded',
+                },
+                body: body.join('&'),
+            },
+        )
+
+        const data = await response.json()
+        const token = (data as any).access_token
+        if ( !token ) {
+            throw new ErrorWithContext('Unable to obtain access token from response', {
+                data,
+            })
+        }
+
+        return String(token)
+    }
+
+    /** Update values on the Authenticatable from user data. */
+    protected updateUser(user: any, data: any): void {
+        user.firstName = data.first_name
+        user.lastName = data.last_name
+        user.email = data.email
+        user.tagline = data.tagline
+        user.photoUrl = data.profile_photo
+    }
+}

src/auth/provider/oauth/OAuth2LoginProvider.ts

@@ -0,0 +1,98 @@
+import {LoginProvider, LoginProviderConfig} from '../LoginProvider'
+import {ResponseObject, Route} from '../../../http/routing/Route'
+import {Inject, Injectable} from '../../../di'
+import {Routing} from '../../../service/Routing'
+import {GuestRequiredMiddleware} from '../../middleware/GuestRequiredMiddleware'
+import {redirect} from '../../../http/response/RedirectResponseFactory'
+import {view} from '../../../http/response/ViewResponseFactory'
+import {Request} from '../../../http/lifecycle/Request'
+import {Awaitable} from '../../../util'
+import {Authenticatable} from '../../types'
+
+export interface OAuth2LoginProviderConfig extends LoginProviderConfig {
+    displayName: string,
+    clientId: string|number
+    clientSecret: string
+    loginUrl: string
+    loginMessage?: string
+    logoutUrl?: string
+    tokenUrl: string,
+    userUrl: string,
+}
+
+/**
+ * LoginProvider implementation for OAuth2-based logins.
+ */
+@Injectable()
+export abstract class OAuth2LoginProvider<TConfig extends OAuth2LoginProviderConfig> extends LoginProvider<TConfig> {
+    @Inject()
+    protected readonly routing!: Routing
+
+    public routes(): void {
+        super.routes()
+
+        Route.any('redirect')
+            .alias(`@auth:${this.name}:redirect`)
+            .pre(GuestRequiredMiddleware)
+            .handledBy(() => redirect(this.getLoginUrl()))
+
+        Route.any('callback')
+            .alias(`@auth:${this.name}:callback`)
+            .pre(GuestRequiredMiddleware)
+            .passingRequest()
+            .handledBy(this.handleCallback.bind(this))
+    }
+
+    protected async handleCallback(request: Request): Promise<ResponseObject> {
+        const user = await this.callback(request)
+        if ( user ) {
+            await this.security.authenticate(user)
+            return this.redirectToIntendedRoute()
+        }
+
+        return redirect(this.routing.getNamedPath(`@auth:${this.name}:login`).toRemote)
+    }
+
+    /**
+     * After redirecting back from the OAuth2 server, look up the user information.
+     * @param request
+     * @protected
+     */
+    protected abstract callback(request: Request): Awaitable<Authenticatable>
+
+    public login(): ResponseObject {
+        const buttonUrl = this.routing
+            .getNamedPath(`@auth:${this.name}:redirect`)
+            .toRemote
+
+        return view('@extollo:auth:message', {
+            message: this.config.loginMessage ?? `Sign-in with ${this.config.displayName} to continue`,
+            buttonText: 'Sign-in',
+            buttonUrl,
+        })
+    }
+
+    public async logout(): Promise<ResponseObject> {
+        await this.security.flush()
+
+        if ( this.config.logoutUrl ) {
+            return redirect(this.config.logoutUrl)
+        }
+
+        return view('@extollo:auth:message', {
+            message: 'You have been signed-out',
+        })
+    }
+
+    /**
+     * Get the URL where the user should be redirected to sign-in.
+     * @protected
+     */
+    protected getLoginUrl(): string {
+        const callbackRoute = this.routing.getNamedPath(`@auth:${this.name}:callback`)
+
+        return this.config.loginUrl
+            .replace(/%c/g, String(this.config.clientId))
+            .replace(/%r/g, callbackRoute.toRemote)
+    }
+}