chen-facebook/dist/auth.js

facebook for Chen Framework

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments)).next());
    });
};
const web_1 = require('chen/web');
const core_1 = require('chen/core');
const api_1 = require('./api');
const querystring = require('querystring');
/**
 * FacebookLogin class
 */
class FacebookLogin {
    /**
     * FacebookLogin constructor
     * @param {Facebook} private fb
     * @param {WebContext} private context
     * @param {string} private redirectUri
     */
    constructor(fb, context, redirectUri) {
        this.fb = fb;
        this.context = context;
        let credentials = this.fb.getCredentials();
        this.redirectUri = redirectUri || credentials.redirectUri;
    }
    /**
      * Login
      * @param  {string} redirectUri
      * @return {RedirectResponse}
      */
    login() {
        let credentials = this.fb.getCredentials();
        let params = {
            client_id: credentials.appId,
            redirect_uri: this.redirectUri,
            scope: credentials.scope || [],
            state: Math.random().toString(36).substring(2)
        };
        this.context.request.session.set(this.fb.getSessionKey('state'), params.state);
        return this.context.response.redirect(`https://www.facebook.com/dialog/oauth?${querystring.stringify(params)}`);
    }
    /**
     * Create access token from redirect
     * @return {string}
     */
    createAccessToken() {
        return __awaiter(this, void 0, void 0, function* () {
            if (!(this.context instanceof web_1.Context))
                return null;
            let token = null;
            let request = this.context.request;
            let session = request.session;
            let stateKey = this.fb.getSessionKey('state');
            let credentials = this.fb.getCredentials();
            if ((request.input.has('code') && request.input.has('state') && session.has(stateKey))
                && session.flash(stateKey) == request.input.get('state')) {
                let params = {
                    code: request.input.get('code'),
                    client_id: credentials.appId,
                    client_secret: credentials.appSecret,
                    redirect_uri: this.redirectUri
                };
                let res = yield (new web_1.HttpClient()).get(`${api_1.FacebookApi.BASE_URL}oauth/access_token?${querystring.stringify(params)}`);
                if (res.body) {
                    let body;
                    try {
                        body = JSON.parse(res.body);
                    }
                    catch (e) {
                        body = querystring.parse(res.body);
                    }
                    if (body.error) {
                        throw new core_1.Exception(`facebook: ${body.error.message}`);
                    }
                    token = body.access_token;
                }
            }
            return token;
        });
    }
}
exports.FacebookLogin = FacebookLogin;
//# sourceMappingURL=auth.js.map