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import { partition, uniqueBy } from "remeda";
import { DirectSignupsForProgramItem } from "server/features/direct-signup/directSignupTypes";
import { addEventLogItems } from "server/features/user/event-log/eventLogRepository";
import { queueCancelledDeletedEmails } from "server/features/notifications/queueCancelledDeletedEmails";
import {
findUsers,
updateUsersByUsername,
} from "server/features/user/userRepository";
import { logger } from "server/utils/logger";
import { MongoDbError } from "shared/types/api/errors";
import { EventLogAction } from "shared/types/models/eventLog";
import {
ProgramItem,
SignupType,
State,
} from "shared/types/models/programItem";
import { FavoriteProgramItemId, LotterySignup } from "shared/types/models/user";
import { Result, makeSuccessResult } from "shared/utils/result";
import { getTimeNow } from "server/features/assignment/utils/getTimeNow";
import { getLotterySignupEndTime } from "shared/utils/signupTimes";
import { isLotterySignupProgramItem } from "shared/utils/isLotterySignupProgramItem";
interface InvalidLotterySignup {
lotterySignup: LotterySignup;
action: EventLogAction;
}
interface UserToNofify {
username: string;
invalidLotterySignups: InvalidLotterySignup[];
invalidFavoriteProgramItemIds: FavoriteProgramItemId[];
}
interface RemoveCancelledDeletedProgramItemsFromUsersParams {
programItems: readonly ProgramItem[];
currentProgramItems: readonly ProgramItem[];
notifyAffectedDirectSignups: DirectSignupsForProgramItem[];
notify: boolean;
}
export const removeCancelledDeletedProgramItemsFromUsers = async ({
programItems,
currentProgramItems,
notifyAffectedDirectSignups,
notify,
}: RemoveCancelledDeletedProgramItemsFromUsersParams): Promise<
Result<void, MongoDbError>
> => {
logger.info("Remove invalid program items from users");
const timeNowResult = await getTimeNow();
Iif (!timeNowResult.ok) {
return timeNowResult;
}
const usersResult = await findUsers();
Iif (!usersResult.ok) {
return usersResult;
}
const usersToNofify: UserToNofify[] = [];
const usersToUpdate = usersResult.value.flatMap((user) => {
// LOTTERY SIGNUPS
const classifiedLotterySignups = user.lotterySignups.map(
(lotterySignup) => {
const foundProgramItem = programItems.find(
(programItem) =>
programItem.programItemId === lotterySignup.programItemId,
);
const cancellationAction = getCancellationAction(foundProgramItem);
// Valid signups are kept. Invalid ones are preserved only if the item still
// exists and its lottery has already run; deleted items are always removed
const keep =
cancellationAction === undefined ||
(foundProgramItem !== undefined &&
!timeNowResult.value.isBefore(
getLotterySignupEndTime(foundProgramItem),
));
return { lotterySignup, keep, cancellationAction };
},
);
const keepLotterySignups = classifiedLotterySignups
.filter((classified) => classified.keep)
.map((classified) => classified.lotterySignup);
const removeLotterySignups = classifiedLotterySignups.flatMap(
(classified) =>
!classified.keep && classified.cancellationAction !== undefined
? [
{
lotterySignup: classified.lotterySignup,
action: classified.cancellationAction,
},
]
: [],
);
const changedLotterySignupsCount =
user.lotterySignups.length - keepLotterySignups.length;
if (changedLotterySignupsCount > 0) {
logger.info(
`Remove ${changedLotterySignupsCount} cancelled/removed lotterySignups from user ${user.username}`,
);
}
// FAVORITES — removed only when the program item is deleted from DB
const [validFavoriteProgramItemIds, invalidFavoriteProgramItemIds] =
partition(user.favoriteProgramItemIds, (favoriteProgramItemId) => {
const foundProgramItem = programItems.find(
(programItem) => programItem.programItemId === favoriteProgramItemId,
);
return foundProgramItem !== undefined;
});
const changedFavoriteProgramItemIdsCount =
user.favoriteProgramItemIds.length - validFavoriteProgramItemIds.length;
if (changedFavoriteProgramItemIdsCount > 0) {
logger.info(
`Remove ${changedFavoriteProgramItemIdsCount} cancelled/removed favorite program items from user ${user.username}`,
);
}
// UPDATES
if (
changedLotterySignupsCount > 0 ||
changedFavoriteProgramItemIdsCount > 0
) {
usersToNofify.push({
username: user.username,
invalidLotterySignups: removeLotterySignups,
invalidFavoriteProgramItemIds,
});
return {
...user,
lotterySignups: keepLotterySignups,
favoriteProgramItemIds: validFavoriteProgramItemIds,
};
}
return [];
});
const updateUsersResult = await updateUsersByUsername(usersToUpdate);
Iif (!updateUsersResult.ok) {
return updateUsersResult;
}
// Nofify users with cancelled or deleted program items
if (notify && usersToNofify.length > 0) {
const programItemTitlesById = new Map(
[...programItems, ...currentProgramItems].map((programItem) => [
programItem.programItemId,
programItem.title,
]),
);
const notifyUsersResult = await notifyUsersWithLotterySignupOrFavorite(
usersToNofify,
notifyAffectedDirectSignups,
programItemTitlesById,
);
Iif (!notifyUsersResult.ok) {
return notifyUsersResult;
}
}
return makeSuccessResult();
};
// Classifies why a lottery signup program item is invalid, or undefined when it is still valid
const getCancellationAction = (
programItem: ProgramItem | undefined,
): EventLogAction | undefined => {
if (!programItem) {
return EventLogAction.PROGRAM_ITEM_DELETED;
}
if (programItem.state !== State.ACCEPTED) {
return EventLogAction.PROGRAM_ITEM_CANCELLED;
}
if (programItem.signupType !== SignupType.KONSTI) {
return EventLogAction.PROGRAM_ITEM_NO_KONSTI_SIGNUP_ANYMORE;
}
if (!isLotterySignupProgramItem(programItem)) {
return EventLogAction.PROGRAM_ITEM_NO_LOTTERY_ANYMORE;
}
return undefined;
};
const notifyUsersWithLotterySignupOrFavorite = async (
usersToNofify: UserToNofify[],
affectedDirectSignups: DirectSignupsForProgramItem[],
programItemTitlesById: Map<string, string>,
): Promise<Result<void, MongoDbError>> => {
const eventUpdates = usersToNofify.flatMap((user) => {
// If user has already been notified of program item cancel/delete because of a direct signup, don't resend
const userDirectSignups = new Set(
affectedDirectSignups.flatMap((directSignup) => {
const found = directSignup.userSignups.some(
(userSignup) => userSignup.username === user.username,
);
if (found) {
return directSignup.programItemId;
}
return [];
}),
);
const lotteryUpdates = user.invalidLotterySignups.flatMap(
({ lotterySignup, action }) => {
if (userDirectSignups.has(lotterySignup.programItemId)) {
return [];
}
return {
username: user.username,
programItemId: lotterySignup.programItemId,
programItemStartTime: lotterySignup.signedToStartTime,
createdAt: dayjs().toISOString(),
action,
};
},
);
const favoriteUpdates = user.invalidFavoriteProgramItemIds.flatMap(
(favorite) => {
if (userDirectSignups.has(favorite)) {
return [];
}
// Favorites are removed only when the program item is deleted
return {
username: user.username,
programItemId: favorite,
programItemStartTime: dayjs().toISOString(),
createdAt: dayjs().toISOString(),
action: EventLogAction.PROGRAM_ITEM_DELETED,
};
},
);
return uniqueBy(
[...lotteryUpdates, ...favoriteUpdates],
(update) => update.programItemId,
);
});
if (eventUpdates.length > 0) {
const addEventLogItemsResult = await addEventLogItems(eventUpdates);
Iif (!addEventLogItemsResult.ok) {
return addEventLogItemsResult;
}
await queueCancelledDeletedEmails(eventUpdates, programItemTitlesById);
}
return makeSuccessResult();
};
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