diff options
Diffstat (limited to 'src/server/apis/google/GoogleApiServerUtils.ts')
| -rw-r--r-- | src/server/apis/google/GoogleApiServerUtils.ts | 194 |
1 files changed, 122 insertions, 72 deletions
diff --git a/src/server/apis/google/GoogleApiServerUtils.ts b/src/server/apis/google/GoogleApiServerUtils.ts index 8785cd974..963c7736a 100644 --- a/src/server/apis/google/GoogleApiServerUtils.ts +++ b/src/server/apis/google/GoogleApiServerUtils.ts @@ -1,11 +1,14 @@ -import { google, docs_v1, slides_v1 } from "googleapis"; +import { google } from "googleapis"; import { createInterface } from "readline"; import { readFile, writeFile } from "fs"; -import { OAuth2Client } from "google-auth-library"; +import { OAuth2Client, Credentials } from "google-auth-library"; import { Opt } from "../../../new_fields/Doc"; import { GlobalOptions } from "googleapis-common"; import { GaxiosResponse } from "gaxios"; - +import request = require('request-promise'); +import * as qs from 'query-string'; +import Photos = require('googlephotos'); +import { Database } from "../../database"; /** * Server side authentication for Google Api queries. */ @@ -20,6 +23,9 @@ export namespace GoogleApiServerUtils { 'presentations.readonly', 'drive', 'drive.file', + 'photoslibrary', + 'photoslibrary.appendonly', + 'photoslibrary.sharing' ]; export const parseBuffer = (data: Buffer) => JSON.parse(data.toString()); @@ -29,102 +35,146 @@ export namespace GoogleApiServerUtils { Slides = "Slides" } - - export interface CredentialPaths { - credentials: string; - token: string; + export interface CredentialInformation { + credentialsPath: string; + userId: string; } export type ApiResponse = Promise<GaxiosResponse>; - export type ApiRouter = (endpoint: Endpoint, paramters: any) => ApiResponse; - export type ApiHandler = (parameters: any) => ApiResponse; + export type ApiRouter = (endpoint: Endpoint, parameters: any) => ApiResponse; + export type ApiHandler = (parameters: any, methodOptions?: any) => ApiResponse; export type Action = "create" | "retrieve" | "update"; export type Endpoint = { get: ApiHandler, create: ApiHandler, batchUpdate: ApiHandler }; export type EndpointParameters = GlobalOptions & { version: "v1" }; - export const GetEndpoint = async (sector: string, paths: CredentialPaths) => { - return new Promise<Opt<Endpoint>>((resolve, reject) => { - readFile(paths.credentials, (err, credentials) => { + export const GetEndpoint = (sector: string, paths: CredentialInformation) => { + return new Promise<Opt<Endpoint>>(resolve => { + RetrieveCredentials(paths).then(authentication => { + let routed: Opt<Endpoint>; + let parameters: EndpointParameters = { auth: authentication.client, version: "v1" }; + switch (sector) { + case Service.Documents: + routed = google.docs(parameters).documents; + break; + case Service.Slides: + routed = google.slides(parameters).presentations; + break; + } + resolve(routed); + }); + }); + }; + + export const RetrieveAccessToken = (information: CredentialInformation) => { + return new Promise<string>((resolve, reject) => { + RetrieveCredentials(information).then( + credentials => resolve(credentials.token.access_token!), + error => reject(`Error: unable to authenticate Google Photos API request.\n${error}`) + ); + }); + }; + + const RetrieveOAuthClient = async (information: CredentialInformation) => { + return new Promise<OAuth2Client>((resolve, reject) => { + readFile(information.credentialsPath, async (err, credentials) => { if (err) { reject(err); return console.log('Error loading client secret file:', err); } - return authorize(parseBuffer(credentials), paths.token).then(auth => { - let routed: Opt<Endpoint>; - let parameters: EndpointParameters = { auth, version: "v1" }; - switch (sector) { - case Service.Documents: - routed = google.docs(parameters).documents; - break; - case Service.Slides: - routed = google.slides(parameters).presentations; - break; - } - resolve(routed); - }); + const { client_secret, client_id, redirect_uris } = parseBuffer(credentials).installed; + resolve(new google.auth.OAuth2(client_id, client_secret, redirect_uris[0])); }); }); }; + export const GenerateAuthenticationUrl = async (information: CredentialInformation) => { + const client = await RetrieveOAuthClient(information); + return client.generateAuthUrl({ + access_type: 'offline', + scope: SCOPES.map(relative => prefix + relative), + }); + }; + + export const ProcessClientSideCode = async (information: CredentialInformation, authenticationCode: string): Promise<TokenResult> => { + const oAuth2Client = await RetrieveOAuthClient(information); + return new Promise<TokenResult>((resolve, reject) => { + oAuth2Client.getToken(authenticationCode, async (err, token) => { + if (err || !token) { + reject(err); + return console.error('Error retrieving access token', err); + } + oAuth2Client.setCredentials(token); + await Database.Auxiliary.GoogleAuthenticationToken.Write(information.userId, token); + resolve({ token, client: oAuth2Client }); + }); + }); + }; + export const RetrieveCredentials = (information: CredentialInformation) => { + return new Promise<TokenResult>((resolve, reject) => { + readFile(information.credentialsPath, async (err, credentials) => { + if (err) { + reject(err); + return console.log('Error loading client secret file:', err); + } + authorize(parseBuffer(credentials), information.userId).then(resolve, reject); + }); + }); + }; + + export const RetrievePhotosEndpoint = (paths: CredentialInformation) => { + return new Promise<any>((resolve, reject) => { + RetrieveAccessToken(paths).then( + token => resolve(new Photos(token)), + reject + ); + }); + }; + + type TokenResult = { token: Credentials, client: OAuth2Client }; /** * Create an OAuth2 client with the given credentials, and returns the promise resolving to the authenticated client * @param {Object} credentials The authorization client credentials. */ - export function authorize(credentials: any, token_path: string): Promise<OAuth2Client> { + export function authorize(credentials: any, userId: string): Promise<TokenResult> { const { client_secret, client_id, redirect_uris } = credentials.installed; - const oAuth2Client = new google.auth.OAuth2( - client_id, client_secret, redirect_uris[0]); - - return new Promise<OAuth2Client>((resolve, reject) => { - readFile(token_path, (err, token) => { - // Check if we have previously stored a token. - if (err) { - return getNewToken(oAuth2Client, token_path).then(resolve, reject); + const oAuth2Client = new google.auth.OAuth2(client_id, client_secret, redirect_uris[0]); + return new Promise<TokenResult>((resolve, reject) => { + // Attempting to authorize user (${userId}) + Database.Auxiliary.GoogleAuthenticationToken.Fetch(userId).then(token => { + if (token!.expiry_date! < new Date().getTime()) { + // Token has expired, so submitting a request for a refreshed access token + return refreshToken(token!, client_id, client_secret, oAuth2Client, userId).then(resolve, reject); } - oAuth2Client.setCredentials(parseBuffer(token)); - resolve(oAuth2Client); + // Authentication successful! + oAuth2Client.setCredentials(token!); + resolve({ token: token!, client: oAuth2Client }); }); }); } - /** - * Get and store new token after prompting for user authorization, and then - * execute the given callback with the authorized OAuth2 client. - * @param {google.auth.OAuth2} oAuth2Client The OAuth2 client to get token for. - * @param {getEventsCallback} callback The callback for the authorized client. - */ - function getNewToken(oAuth2Client: OAuth2Client, token_path: string) { - return new Promise<OAuth2Client>((resolve, reject) => { - const authUrl = oAuth2Client.generateAuthUrl({ - access_type: 'offline', - scope: SCOPES.map(relative => prefix + relative), - }); - console.log('Authorize this app by visiting this url:', authUrl); - const rl = createInterface({ - input: process.stdin, - output: process.stdout, - }); - rl.question('Enter the code from that page here: ', (code) => { - rl.close(); - oAuth2Client.getToken(code, (err, token) => { - if (err || !token) { - reject(err); - return console.error('Error retrieving access token', err); - } - oAuth2Client.setCredentials(token); - // Store the token to disk for later program executions - writeFile(token_path, JSON.stringify(token), (err) => { - if (err) { - console.error(err); - reject(err); - } - console.log('Token stored to', token_path); - }); - resolve(oAuth2Client); - }); + const refreshEndpoint = "https://oauth2.googleapis.com/token"; + const refreshToken = (credentials: Credentials, client_id: string, client_secret: string, oAuth2Client: OAuth2Client, userId: string) => { + return new Promise<TokenResult>(resolve => { + let headerParameters = { headers: { 'Content-Type': 'application/x-www-form-urlencoded' } }; + let queryParameters = { + refreshToken: credentials.refresh_token, + client_id, + client_secret, + grant_type: "refresh_token" + }; + let url = `${refreshEndpoint}?${qs.stringify(queryParameters)}`; + request.post(url, headerParameters).then(async response => { + let { access_token, expires_in } = JSON.parse(response); + const expiry_date = new Date().getTime() + (expires_in * 1000); + await Database.Auxiliary.GoogleAuthenticationToken.Update(userId, access_token, expiry_date); + credentials.access_token = access_token; + credentials.expiry_date = expiry_date; + oAuth2Client.setCredentials(credentials); + resolve({ token: credentials, client: oAuth2Client }); }); }); - } + }; + }
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