cal.pub0.org/packages/app-store/office365calendar/lib/CalendarService.ts

440 lines
14 KiB
TypeScript

import type { Calendar as OfficeCalendar, User } from "@microsoft/microsoft-graph-types-beta";
import dayjs from "@calcom/dayjs";
import { getLocation, getRichDescription } from "@calcom/lib/CalEventParser";
import { handleErrorsJson, handleErrorsRaw } from "@calcom/lib/errors";
import logger from "@calcom/lib/logger";
import prisma from "@calcom/prisma";
import type { BufferedBusyTime } from "@calcom/types/BufferedBusyTime";
import type {
Calendar,
CalendarEvent,
EventBusyDate,
IntegrationCalendar,
NewCalendarEventType,
} from "@calcom/types/Calendar";
import type { CredentialPayload } from "@calcom/types/Credential";
import type { O365AuthCredentials } from "../types/Office365Calendar";
import { getOfficeAppKeys } from "./getOfficeAppKeys";
interface IRequest {
method: string;
url: string;
id: number;
}
interface ISettledResponse {
id: string;
status: number;
headers: {
"Retry-After": string;
"Content-Type": string;
};
body: Record<string, any>;
}
interface IBatchResponse {
responses: ISettledResponse[];
}
export default class Office365CalendarService implements Calendar {
private url = "";
private integrationName = "";
private log: typeof logger;
private accessToken: string | null = null;
auth: { getToken: () => Promise<string> };
private apiGraphUrl = "https://graph.microsoft.com/v1.0";
constructor(credential: CredentialPayload) {
this.integrationName = "office365_calendar";
this.auth = this.o365Auth(credential);
this.log = logger.getChildLogger({ prefix: [`[[lib] ${this.integrationName}`] });
}
async createEvent(event: CalendarEvent): Promise<NewCalendarEventType> {
try {
const calendarId = event.destinationCalendar?.externalId
? `${event.destinationCalendar.externalId}/`
: "";
const response = await this.fetcher(`/me/calendars/${calendarId}events`, {
method: "POST",
body: JSON.stringify(this.translateEvent(event)),
});
return handleErrorsJson(response);
} catch (error) {
this.log.error(error);
throw error;
}
}
async updateEvent(uid: string, event: CalendarEvent): Promise<any> {
try {
const response = await this.fetcher(`/me/calendar/events/${uid}`, {
method: "PATCH",
body: JSON.stringify(this.translateEvent(event)),
});
return handleErrorsRaw(response);
} catch (error) {
this.log.error(error);
throw error;
}
}
async deleteEvent(uid: string): Promise<void> {
try {
const response = await this.fetcher(`/me/calendar/events/${uid}`, {
method: "DELETE",
});
handleErrorsRaw(response);
} catch (error) {
this.log.error(error);
throw error;
}
}
async getAvailability(
dateFrom: string,
dateTo: string,
selectedCalendars: IntegrationCalendar[]
): Promise<EventBusyDate[]> {
const dateFromParsed = new Date(dateFrom);
const dateToParsed = new Date(dateTo);
const filter = `?startDateTime=${encodeURIComponent(
dateFromParsed.toISOString()
)}&endDateTime=${encodeURIComponent(dateToParsed.toISOString())}`;
try {
const selectedCalendarIds = selectedCalendars
.filter((e) => e.integration === this.integrationName)
.map((e) => e.externalId)
.filter(Boolean);
if (selectedCalendarIds.length === 0 && selectedCalendars.length > 0) {
// Only calendars of other integrations selected
return Promise.resolve([]);
}
const ids = await (selectedCalendarIds.length === 0
? this.listCalendars().then((cals) => cals.map((e_2) => e_2.externalId).filter(Boolean) || [])
: Promise.resolve(selectedCalendarIds));
const requests = ids.map((calendarId, id) => ({
id,
method: "GET",
url: `/me/calendars/${calendarId}/calendarView${filter}`,
}));
const response = await this.apiGraphBatchCall(requests);
const responseBody = await this.handleErrorJsonOffice365Calendar(response);
let responseBatchApi: IBatchResponse = { responses: [] };
if (typeof responseBody === "string") {
responseBatchApi = this.handleTextJsonResponseWithHtmlInBody(responseBody);
}
let alreadySuccessResponse = [] as ISettledResponse[];
// Validate if any 429 status Retry-After is present
const retryAfter =
!!responseBatchApi?.responses && this.findRetryAfterResponse(responseBatchApi.responses);
if (retryAfter && responseBatchApi.responses) {
responseBatchApi = await this.fetchRequestWithRetryAfter(requests, responseBatchApi.responses, 2);
}
// Recursively fetch nextLink responses
alreadySuccessResponse = await this.fetchResponsesWithNextLink(responseBatchApi.responses);
return alreadySuccessResponse ? this.processBusyTimes(alreadySuccessResponse) : [];
} catch (err) {
console.log(err);
return Promise.reject([]);
}
}
async listCalendars(): Promise<IntegrationCalendar[]> {
const officeCalendars: OfficeCalendar[] = [];
// List calendars from MS are paginated
let finishedParsingCalendars = false;
// Store @odata.nextLink if in response
let requestLink = "/me/calendars";
while (!finishedParsingCalendars) {
const response = await this.fetcher(requestLink);
let responseBody = await handleErrorsJson<{ value: OfficeCalendar[]; "@odata.nextLink"?: string }>(
response
);
// If responseBody is valid then parse the JSON text
if (typeof responseBody === "string") {
responseBody = JSON.parse(responseBody) as { value: OfficeCalendar[] };
}
officeCalendars.push(...responseBody.value);
if (responseBody["@odata.nextLink"]) {
requestLink = responseBody["@odata.nextLink"].replace(this.apiGraphUrl, "");
} else {
finishedParsingCalendars = true;
}
}
const user = await this.fetcher("/me");
const userResponseBody = await handleErrorsJson<User>(user);
const email = userResponseBody.mail ?? userResponseBody.userPrincipalName;
return officeCalendars.map((cal: OfficeCalendar) => {
const calendar: IntegrationCalendar = {
externalId: cal.id ?? "No Id",
integration: this.integrationName,
name: cal.name ?? "No calendar name",
primary: cal.isDefaultCalendar ?? false,
readOnly: !cal.canEdit && true,
email: email ?? "",
};
return calendar;
});
}
private o365Auth = (credential: CredentialPayload) => {
const isExpired = (expiryDate: number) => expiryDate < Math.round(+new Date() / 1000);
const o365AuthCredentials = credential.key as O365AuthCredentials;
const refreshAccessToken = async (refreshToken: string) => {
const { client_id, client_secret } = await getOfficeAppKeys();
const response = await fetch("https://login.microsoftonline.com/common/oauth2/v2.0/token", {
method: "POST",
headers: { "Content-Type": "application/x-www-form-urlencoded" },
body: new URLSearchParams({
scope: "User.Read Calendars.Read Calendars.ReadWrite",
client_id,
refresh_token: refreshToken,
grant_type: "refresh_token",
client_secret,
}),
});
const responseBody = await handleErrorsJson<{ access_token: string; expires_in: number }>(response);
o365AuthCredentials.access_token = responseBody.access_token;
o365AuthCredentials.expiry_date = Math.round(+new Date() / 1000 + responseBody.expires_in);
await prisma.credential.update({
where: {
id: credential.id,
},
data: {
key: o365AuthCredentials,
},
});
return o365AuthCredentials.access_token;
};
return {
getToken: () =>
!isExpired(o365AuthCredentials.expiry_date)
? Promise.resolve(o365AuthCredentials.access_token)
: refreshAccessToken(o365AuthCredentials.refresh_token),
};
};
private translateEvent = (event: CalendarEvent) => {
const utcOffset = dayjs(event.startTime, event.organizer.timeZone).utcOffset() / 60;
return {
subject: event.title,
body: {
contentType: "HTML",
content: getRichDescription(event),
},
start: {
dateTime: dayjs(event.startTime).utcOffset(utcOffset).format(),
timeZone: event.organizer.timeZone,
},
end: {
dateTime: dayjs(event.endTime).utcOffset(utcOffset).format(),
timeZone: event.organizer.timeZone,
},
attendees: event.attendees.map((attendee) => ({
emailAddress: {
address: attendee.email,
name: attendee.name,
},
type: "required",
})),
location: event.location ? { displayName: getLocation(event) } : undefined,
};
};
private fetcher = async (endpoint: string, init?: RequestInit | undefined) => {
this.accessToken = await this.auth.getToken();
return fetch(`${this.apiGraphUrl}${endpoint}`, {
method: "get",
headers: {
Authorization: "Bearer " + this.accessToken,
"Content-Type": "application/json",
},
...init,
});
};
private fetchResponsesWithNextLink = async (
settledResponses: ISettledResponse[]
): Promise<ISettledResponse[]> => {
const alreadySuccess = [] as ISettledResponse[];
const newLinkRequest = [] as IRequest[];
settledResponses?.forEach((response) => {
if (response.status === 200 && response.body["@odata.nextLink"] === undefined) {
alreadySuccess.push(response);
} else {
const nextLinkUrl = response.body["@odata.nextLink"]
? response.body["@odata.nextLink"].replace(this.apiGraphUrl, "")
: "";
if (nextLinkUrl) {
// Saving link for later use
newLinkRequest.push({
id: Number(response.id),
method: "GET",
url: nextLinkUrl,
});
}
delete response.body["@odata.nextLink"];
// Pushing success body content
alreadySuccess.push(response);
}
});
if (newLinkRequest.length === 0) {
return alreadySuccess;
}
const newResponse = await this.apiGraphBatchCall(newLinkRequest);
let newResponseBody = await handleErrorsJson<IBatchResponse | string>(newResponse);
if (typeof newResponseBody === "string") {
newResponseBody = this.handleTextJsonResponseWithHtmlInBody(newResponseBody);
}
// Going recursive to fetch next link
const newSettledResponses = await this.fetchResponsesWithNextLink(newResponseBody.responses);
return [...alreadySuccess, ...newSettledResponses];
};
private fetchRequestWithRetryAfter = async (
originalRequests: IRequest[],
settledPromises: ISettledResponse[],
maxRetries: number,
retryCount = 0
): Promise<IBatchResponse> => {
let retryAfterTimeout = 0;
if (retryCount >= maxRetries) {
return { responses: settledPromises };
}
const alreadySuccessRequest = [] as ISettledResponse[];
const failedRequest = [] as IRequest[];
settledPromises.forEach((item) => {
if (item.status === 200) {
alreadySuccessRequest.push(item);
} else if (item.status === 429) {
const newTimeout = Number(item.headers["Retry-After"]) * 1000 || 0;
retryAfterTimeout = newTimeout > retryAfterTimeout ? newTimeout : retryAfterTimeout;
failedRequest.push(originalRequests[Number(item.id)]);
}
});
if (failedRequest.length === 0) {
return { responses: alreadySuccessRequest };
}
// Await certain time from retry-after header
await new Promise((r) => setTimeout(r, retryAfterTimeout));
const newResponses = await this.apiGraphBatchCall(failedRequest);
let newResponseBody = await handleErrorsJson<IBatchResponse | string>(newResponses);
if (typeof newResponseBody === "string") {
newResponseBody = this.handleTextJsonResponseWithHtmlInBody(newResponseBody);
}
const retryAfter = !!newResponseBody?.responses && this.findRetryAfterResponse(newResponseBody.responses);
if (retryAfter && newResponseBody.responses) {
newResponseBody = await this.fetchRequestWithRetryAfter(
failedRequest,
newResponseBody.responses,
maxRetries,
retryCount + 1
);
}
return { responses: [...alreadySuccessRequest, ...(newResponseBody?.responses || [])] };
};
private apiGraphBatchCall = async (requests: IRequest[]): Promise<Response> => {
try {
const response = await this.fetcher(`/$batch`, {
method: "POST",
body: JSON.stringify({ requests }),
});
return response;
} catch (error: any) {
throw new Error(error);
}
};
private handleTextJsonResponseWithHtmlInBody = (response: string): IBatchResponse => {
try {
const parsedJson = JSON.parse(response);
return parsedJson;
} catch (error) {
// Looking for html in body
const openTag = '"body":<';
const closeTag = "</html>";
const htmlBeginning = response.indexOf(openTag) + openTag.length - 1;
const htmlEnding = response.indexOf(closeTag) + closeTag.length + 2;
const resultString = `${response.repeat(1).substring(0, htmlBeginning)} ""${response
.repeat(1)
.substring(htmlEnding, response.length)}`;
return JSON.parse(resultString);
}
};
private findRetryAfterResponse = (response: ISettledResponse[]) => {
const foundRetry = response.find((request: ISettledResponse) => request.status === 429);
return !!foundRetry;
};
private processBusyTimes = (responses: ISettledResponse[]) => {
return responses.reduce(
(acc: BufferedBusyTime[], subResponse: { body: { value?: any[]; error?: any[] } }) => {
if (!subResponse.body?.value) return acc;
return acc.concat(
subResponse.body.value
.filter((evt) => evt.showAs !== "free" && evt.showAs !== "workingElsewhere")
.map((evt) => ({
start: evt.start.dateTime + "Z",
end: evt.end.dateTime + "Z",
}))
);
},
[]
);
};
private handleErrorJsonOffice365Calendar = <Type>(response: Response): Promise<Type | string> => {
if (response.headers.get("content-encoding") === "gzip") {
return response.text();
}
if (response.status === 204) {
return new Promise((resolve) => resolve({} as Type));
}
if (!response.ok && response.status < 200 && response.status >= 300) {
response.json().then(console.log);
throw Error(response.statusText);
}
return response.json();
};
}