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import { isNonNullish, unique } from "remeda";
import { z } from "zod";
import { debtAmountSchema, debtNoteSchema } from "~app/utils/validation";
import type { DebtId } from "~db/ids";
import { temporalSchemas } from "~utils/temporal";
import { queueCallFactory } from "~web/handlers/batch";
import type { AuthorizedContext } from "~web/handlers/context";
import { authProcedure } from "~web/handlers/trpc";
import {
currencyCodeSchema,
peerIdSchema,
receiptIdSchema,
} from "~web/handlers/validation";
import { upsertAutoAcceptedDebts } from "./utils";
const addDebtSchema = z.strictObject({
note: debtNoteSchema,
currencyCode: currencyCodeSchema,
peerId: peerIdSchema,
amount: debtAmountSchema,
timestamp: temporalSchemas.plainDate.optional(),
receiptId: receiptIdSchema.optional(),
});
const getData = async (
ctx: AuthorizedContext,
debts: readonly z.infer<typeof addDebtSchema>[],
) => {
const peerIds = unique(debts.map(({ peerId }) => peerId));
const receiptPeerTuples = unique(
debts
.map(({ receiptId, peerId }) =>
receiptId ? { receiptId, peerId } : undefined,
)
.filter(isNonNullish),
);
const [peers, debtReceiptTuples] = await Promise.all([
ctx.database
.selectFrom("peers")
.leftJoin("userSettings", (qb) =>
qb.onRef("peers.connectedUserId", "=", "userSettings.userId"),
)
.leftJoin("peers as peersTheir", (qb) =>
qb
.onRef("peersTheir.ownerUserId", "=", "peers.connectedUserId")
.on("peersTheir.connectedUserId", "=", ctx.auth.userId),
)
.select([
"peers.id as peerId",
"peers.ownerUserId as selfUserId",
"peers.connectedUserId as foreignUserId",
"peersTheir.id as theirPeerId",
"userSettings.manualAcceptDebts",
])
.where("peers.id", "in", peerIds)
.execute(),
receiptPeerTuples.length === 0
? []
: ctx.database
.selectFrom("debts")
.where((eb) =>
eb.or(
receiptPeerTuples.map(({ receiptId, peerId }) =>
eb.and({
"debts.receiptId": receiptId,
"debts.peerId": peerId,
}),
),
),
)
.where("debts.ownerUserId", "=", ctx.auth.userId)
.select(["debts.peerId", "debts.receiptId"])
.execute(),
]);
return { peers, debtReceiptTuples };
};
const getDebtPeerReceiptTupleId = (debt: z.infer<typeof addDebtSchema>) =>
`${debt.peerId}/${debt.receiptId}`;
const getMatchedPeer = (
debt: z.infer<typeof addDebtSchema>,
peers: Awaited<ReturnType<typeof getData>>["peers"],
) => {
const matchedPeer = peers.find((peer) => peer.peerId === debt.peerId);
/* c8 ignore start */
if (!matchedPeer) {
throw new TRPCError({
code: "INTERNAL_SERVER_ERROR",
message: `Expected to have a matched peer id "${debt.peerId}".`,
});
}
/* c8 ignore stop */
return matchedPeer;
};
const addAutoAcceptingDebts = async (
ctx: AuthorizedContext,
peers: Awaited<ReturnType<typeof getData>>["peers"],
debts: (z.infer<typeof addDebtSchema> & { generatedId: DebtId })[],
) => {
const { updatedDebts, newDebts } = await upsertAutoAcceptedDebts(
ctx.database,
debts
.map(({ generatedId, ...debt }) => {
const peer = getMatchedPeer(debt, peers);
if (
!peer.foreignUserId ||
!peer.theirPeerId ||
peer.manualAcceptDebts
) {
return null;
}
return {
id: generatedId,
note: debt.note,
currencyCode: debt.currencyCode,
timestamp: debt.timestamp || Temporal.Now.plainDateISO(),
receiptId: debt.receiptId,
ownerUserId: peer.foreignUserId,
peerId: peer.theirPeerId,
amount: (-debt.amount).toString(),
isNew: true,
};
})
.filter(isNonNullish),
);
const acceptingReversePeerIds = unique([
...newDebts.map((debt) => debt.peerId),
...updatedDebts.map((debt) => debt.peerId),
]);
const acceptedPeerIds = acceptingReversePeerIds.map((reversePeerId) => {
const matchedPeer = peers.find(
(peer) => peer.theirPeerId === reversePeerId,
);
/* c8 ignore start */
if (!matchedPeer) {
throw new TRPCError({
code: "INTERNAL_SERVER_ERROR",
message: `Expected to have a peer for reverse peer id "${reversePeerId}".`,
});
}
/* c8 ignore stop */
return matchedPeer.peerId;
});
return {
reverseIdMap: debts.reduce<Partial<Record<string, DebtId>>>((acc, debt) => {
if (!debt.receiptId) {
return acc;
}
const matchedPeer = getMatchedPeer(debt, peers);
const matchedUpdatedDebt = updatedDebts.find(
(lookupDebt) =>
lookupDebt.receiptId === debt.receiptId &&
lookupDebt.peerId === matchedPeer.theirPeerId,
);
if (!matchedUpdatedDebt) {
return acc;
}
return {
...acc,
[getDebtPeerReceiptTupleId(debt)]: matchedUpdatedDebt.id,
};
}, {}),
acceptedPeerIds,
};
};
const addDebts = async (
ctx: AuthorizedContext,
debts: (z.infer<typeof addDebtSchema> & { generatedId: DebtId })[],
reverseIdMap: Awaited<
ReturnType<typeof addAutoAcceptingDebts>
>["reverseIdMap"],
) => {
if (debts.length === 0) {
return [];
}
const values = await ctx.database
.insertInto("debts")
.values(
debts
.map(({ generatedId, ...debt }) => ({
id: reverseIdMap[getDebtPeerReceiptTupleId(debt)] || generatedId,
note: debt.note,
currencyCode: debt.currencyCode,
timestamp: debt.timestamp || Temporal.Now.plainDateISO(),
receiptId: debt.receiptId,
ownerUserId: ctx.auth.userId,
peerId: debt.peerId,
amount: debt.amount.toString(),
}))
.filter(isNonNullish),
)
.returning(["debts.id", "debts.updatedAt"])
.execute();
return debts.map(({ generatedId, ...debt }) => {
const id = reverseIdMap[getDebtPeerReceiptTupleId(debt)] || generatedId;
// We just added these value, should be returned in `values` variable
// oxlint-disable-next-line typescript/no-non-null-assertion
const { updatedAt } = values.find(({ id: lookupId }) => lookupId === id)!;
return { id, updatedAt };
});
};
const queueAddDebt = queueCallFactory<
AuthorizedContext,
z.infer<typeof addDebtSchema>,
{
id: DebtId;
updatedAt: Temporal.ZonedDateTime;
// `undefined` signifies that peer is local
reverseAccepted: boolean | undefined;
}
>((ctx) => async (inputs) => {
const { peers, debtReceiptTuples } = await getData(ctx, inputs);
const debtsOrErrors = inputs.map((debt) => {
const matchedPeer = peers.find((result) => result.peerId === debt.peerId);
if (!matchedPeer) {
return new TRPCError({
code: "NOT_FOUND",
message: `Peer "${debt.peerId}" does not exist.`,
});
}
if (matchedPeer.selfUserId !== ctx.auth.userId) {
return new TRPCError({
code: "FORBIDDEN",
message: `Peer "${debt.peerId}" is not owned by "${ctx.auth.email}".`,
});
}
if (debt.peerId === matchedPeer.selfUserId) {
return new TRPCError({
code: "FORBIDDEN",
message: `Cannot add a debt for yourself.`,
});
}
const matchedDebtReceipt = debtReceiptTuples.find(
({ peerId, receiptId }) =>
peerId === debt.peerId && receiptId === debt.receiptId,
);
if (matchedDebtReceipt) {
return new TRPCError({
code: "FORBIDDEN",
message: `There is already a debt for peer "${matchedDebtReceipt.peerId}" in receipt "${matchedDebtReceipt.receiptId}".`,
});
}
return { ...debt, generatedId: ctx.getUuid() };
});
const debts = debtsOrErrors.filter(
(debtOrError): debtOrError is Exclude<typeof debtOrError, TRPCError> =>
!(debtOrError instanceof TRPCError),
);
const { reverseIdMap, acceptedPeerIds } = await addAutoAcceptingDebts(
ctx,
peers,
debts,
);
const localPeerIds = new Set(
peers
.filter((peer) => peer.foreignUserId === null)
.map((peer) => peer.peerId),
);
const addedDebts = await addDebts(ctx, debts, reverseIdMap);
return debtsOrErrors.map((debtOrError) => {
if (debtOrError instanceof TRPCError) {
return debtOrError;
}
const id =
reverseIdMap[getDebtPeerReceiptTupleId(debtOrError)] ||
debtOrError.generatedId;
const matchedAddedDebt = addedDebts.find(
(addedDebt) => addedDebt.id === id,
);
/* c8 ignore start */
if (!matchedAddedDebt) {
return new TRPCError({
code: "INTERNAL_SERVER_ERROR",
message: `Expected to have matched added debt for id "${id}".`,
});
}
/* c8 ignore stop */
return {
id,
updatedAt: matchedAddedDebt.updatedAt,
reverseAccepted: localPeerIds.has(debtOrError.peerId)
? undefined
: acceptedPeerIds.includes(debtOrError.peerId),
};
});
});
export const procedure = authProcedure
.meta({
title: "Add debt",
description:
"Adds a debt for a given peerId, auto-accepting the mirrored debt on the counterparty's user unless they require manual acceptance.",
})
.input(addDebtSchema)
.mutation(queueAddDebt);
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