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import { unique } from "remeda";
import { MongoDbError } from "shared/types/api/errors";
import { EmailNotificationTrigger } from "shared/types/emailNotification";
import { EventLogAction } from "shared/types/models/eventLog";
import { ProgramItem } from "shared/types/models/programItem";
import { UserAssignmentResult } from "shared/types/models/result";
import { Settings } from "shared/types/models/settings";
import { User } from "shared/types/models/user";
import { Result, makeSuccessResult } from "shared/utils/result";
import { getGroupCreators } from "server/features/assignment/utils/getGroupCreators";
import { getGroupMembersWithCreatorLotterySignups } from "server/features/assignment/utils/getGroupMembers";
import { getLotterySignups } from "server/features/assignment/utils/getLotterySignups";
import { getStartingProgramItems } from "server/features/assignment/utils/getStartingProgramItems";
import {
delAssignmentDirectSignupsByStartTime,
delDirectSignups,
findDirectSignupsByStartTime,
saveDirectSignups,
} from "server/features/direct-signup/directSignupRepository";
import { SignupRepositoryAddSignup } from "server/features/direct-signup/directSignupTypes";
import { findOrCreateSettings } from "server/features/settings/settingsRepository";
import {
addEventLogItems,
deleteEventLogItemsByStartTime,
} from "server/features/user/event-log/eventLogRepository";
import { isStartTimeMatch } from "server/utils/isStartTimeMatch";
import { logger } from "server/utils/logger";
import {
NotificationQueueService,
NotificationTask,
NotificationTaskType,
getGlobalNotificationQueueService,
} from "server/utils/notificationQueue";
interface SaveUserSignupResultsParams {
assignmentTime: string;
results: readonly UserAssignmentResult[];
users: User[];
programItems: ProgramItem[];
}
export const saveUserSignupResults = async ({
assignmentTime,
results,
users,
programItems,
}: SaveUserSignupResultsParams): Promise<Result<void, MongoDbError>> => {
// Remove previous lottery result for the same start time
// This does not remove non-lottery sign-ups or previous sign-ups from moved program items
const delAssignmentSignupsByStartTimeResult =
await delAssignmentDirectSignupsByStartTime(assignmentTime, programItems);
Iif (!delAssignmentSignupsByStartTimeResult.ok) {
return delAssignmentSignupsByStartTimeResult;
}
// Only non-lottery sign-ups and previous sign-ups from moved program items should be remaining
const directSignupsByStartTimeResult = await findDirectSignupsByStartTime(
assignmentTime,
programItems,
);
Iif (!directSignupsByStartTimeResult.ok) {
return directSignupsByStartTimeResult;
}
// Resolve conflicting existing direct sign-ups
// If user has existing sign-ups...
// ... and new assignment result -> remove existing
// ... and no new assignment result -> keep existing
// A user can hold several sign-ups at the same start time (e.g. an always-open item plus a
// moved-in one), so remove every one of theirs, not just the first
const signupsToDelete = results.flatMap((result) =>
directSignupsByStartTimeResult.value
.filter((signup) => signup.username === result.username)
.map((signup) => ({
username: signup.username,
directSignupProgramItemId: signup.programItemId,
})),
);
const delDirectSignupsResult = await delDirectSignups(signupsToDelete);
Iif (!delDirectSignupsResult.ok) {
return delDirectSignupsResult;
}
// Save new assignment results
const newSignups: SignupRepositoryAddSignup[] = results.map((result) => {
return {
username: result.username,
directSignupProgramItemId: result.assignmentSignup.programItemId,
// assignmentTime can be parent-resolved; direct sign-ups store parent time for lottery re-run cleanup
signedToStartTime: assignmentTime,
signupTime: dayjs().toISOString(),
// Sign-ups received from assignment don't have sign-up messages
message: "",
priority: result.assignmentSignup.priority,
};
});
// This might drop some sign-ups if by some error too many sign-ups are passed for a program item
const saveSignupsResult = await saveDirectSignups(newSignups, programItems);
Iif (!saveSignupsResult.ok) {
return saveSignupsResult;
}
const { droppedSignups } = saveSignupsResult.value;
// Filter out possible dropped results
const finalResults = results.filter((result) => {
return droppedSignups.every(
(signup) =>
signup.directSignupProgramItemId !==
result.assignmentSignup.programItemId ||
signup.username !== result.username,
);
});
// The assignment seats are saved at this point, notification failures are
// handled inside and don't fail the run
await addAssignmentNotifications({
assignmentTime,
finalResults,
users,
programItems,
});
return makeSuccessResult();
};
interface AddAssignmentNotificationsParams {
assignmentTime: string;
finalResults: readonly UserAssignmentResult[];
users: User[];
programItems: ProgramItem[];
}
// The assignment seats are already saved when this runs, so failures are only
// logged and never returned: an error escaping to the caller would fail the
// run and skip the overlap lottery sign-up cleanup
const addAssignmentNotifications = async ({
assignmentTime,
finalResults,
users,
programItems,
}: AddAssignmentNotificationsParams): Promise<void> => {
const queueService = getGlobalNotificationQueueService();
const settingsResult = await findOrCreateSettings();
let settings: Settings | null = null;
if (settingsResult.ok) {
settings = settingsResult.value;
} else E{
logger.error(
new Error(
`Assignment ${assignmentTime}: failed to find settings, skip queueing emails`,
),
);
}
// Remove eventLog items from same start time
const deleteEventLogItemsByStartTimeResult =
await deleteEventLogItemsByStartTime(assignmentTime, [
EventLogAction.NEW_ASSIGNMENT,
EventLogAction.NO_ASSIGNMENT,
]);
if (!deleteEventLogItemsByStartTimeResult.ok) {
logger.error(
new Error(
`Assignment ${assignmentTime}: failed to delete previous assignment event log items: ${deleteEventLogItemsByStartTimeResult.error}`,
),
);
}
// Add NEW_ASSIGNMENT to user event logs
const newAssignmentEventLogItemsResult = await addEventLogItems(
finalResults.map((result) => ({
username: result.username,
programItemId: result.assignmentSignup.programItemId,
programItemStartTime: assignmentTime,
createdAt: dayjs().toISOString(),
action: EventLogAction.NEW_ASSIGNMENT,
})),
);
if (!newAssignmentEventLogItemsResult.ok) {
logger.error(
new Error(
`Assignment ${assignmentTime}: failed to add NEW_ASSIGNMENT event log items: ${newAssignmentEventLogItemsResult.error}`,
),
);
}
// Add SEND_EMAIL_ACCEPTED to notification queue
Eif (
settings?.emailNotificationTrigger.includes(
EmailNotificationTrigger.ACCEPTED,
)
) {
queueAssignmentEmails({
queueService,
assignmentTime,
notifications: finalResults.map((result) => ({
type: NotificationTaskType.SEND_EMAIL_ACCEPTED,
username: result.username,
programItemId: result.assignmentSignup.programItemId,
programItemStartTime: result.assignmentSignup.signedToStartTime,
})),
emailKind: EmailNotificationTrigger.ACCEPTED,
});
}
// Get users who didn't get a seat in lottery
const startingProgramItems = getStartingProgramItems(
programItems,
assignmentTime,
);
const groupCreators = getGroupCreators(users, startingProgramItems);
const groupMembers = getGroupMembersWithCreatorLotterySignups(
groupCreators,
users,
);
const allAttendees = [...groupCreators, ...groupMembers];
const lotterySignups = getLotterySignups(allAttendees);
const lotterySignupsForStartingTime = lotterySignups.filter(
(lotterySignup) => {
const programItem = startingProgramItems.find(
(startingProgramItem) =>
startingProgramItem.programItemId === lotterySignup.programItemId,
);
return isStartTimeMatch(
lotterySignup.signedToStartTime,
assignmentTime,
programItem?.parentId,
);
},
);
const lotterySignupUsernames = unique(
lotterySignupsForStartingTime.map(
(lotterySignup) => lotterySignup.username,
),
);
const noAssignmentLotterySignupUsernames = lotterySignupUsernames.flatMap(
(lotterySignupUsername) => {
// Use finalResults so users whose sign-up was dropped are treated as not assigned
const userGotAssignment = finalResults.some(
(result) => result.username === lotterySignupUsername,
);
if (!userGotAssignment) {
return lotterySignupUsername;
}
return [];
},
);
// Add NO_ASSIGNMENT to user event logs
if (noAssignmentLotterySignupUsernames.length > 0) {
const noAssignmentEventLogItemsResult = await addEventLogItems(
noAssignmentLotterySignupUsernames.map(
(noAssignmentLotterySignupUsername) => ({
username: noAssignmentLotterySignupUsername,
programItemId: "",
programItemStartTime: assignmentTime,
createdAt: dayjs().toISOString(),
action: EventLogAction.NO_ASSIGNMENT,
}),
),
);
if (!noAssignmentEventLogItemsResult.ok) {
logger.error(
new Error(
`Assignment ${assignmentTime}: failed to add NO_ASSIGNMENT event log items: ${noAssignmentEventLogItemsResult.error}`,
),
);
}
// Add SEND_EMAIL_REJECTED to notification queue
Eif (
settings?.emailNotificationTrigger.includes(
EmailNotificationTrigger.REJECTED,
)
) {
queueAssignmentEmails({
queueService,
assignmentTime,
notifications: noAssignmentLotterySignupUsernames.map(
(noAssignmentLotterySignupUsername) => ({
type: NotificationTaskType.SEND_EMAIL_REJECTED,
username: noAssignmentLotterySignupUsername,
programItemId: "",
programItemStartTime: assignmentTime,
}),
),
emailKind: EmailNotificationTrigger.REJECTED,
});
}
}
};
interface QueueAssignmentEmailsParams {
queueService: NotificationQueueService | null;
assignmentTime: string;
notifications: NotificationTask[];
emailKind:
| EmailNotificationTrigger.ACCEPTED
| EmailNotificationTrigger.REJECTED;
}
const queueAssignmentEmails = ({
queueService,
assignmentTime,
notifications,
emailKind,
}: QueueAssignmentEmailsParams): void => {
if (queueService === null) {
logger.error(
new Error(
`Assignment ${assignmentTime}: notification queue not initialized, skip queueing ${emailKind} emails`,
),
);
return;
}
const queueNotificationsResult =
queueService.addNotificationsBulk(notifications);
if (!queueNotificationsResult.ok) {
logger.error(
new Error(
`Assignment ${assignmentTime}: failed to queue ${emailKind} emails: ${queueNotificationsResult.error}`,
),
);
}
};
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