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import type { Updateable } from "kysely";
import { isNonNullish, keys, omitBy, unique } from "remeda";
import { z } from "zod";
import { debtAmountSchema, debtNoteSchema } from "~app/utils/validation";
import type { DB } from "~db/types.gen";
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,
debtIdSchema,
receiptIdSchema,
} from "~web/handlers/validation";
import { upsertAutoAcceptedDebts } from "./utils";
const updateDebtSchema = z.strictObject({
id: debtIdSchema,
update: z
.strictObject({
amount: debtAmountSchema,
timestamp: temporalSchemas.plainDate,
note: debtNoteSchema,
currencyCode: currencyCodeSchema,
receiptId: receiptIdSchema.optional(),
})
.partial()
.check((ctx) => {
if (ctx.issues.length !== 0) {
// Short-circuit on continuable errors
// It doesn't make sense to nag on object emptiness if some other error happened
return;
}
if (keys(ctx.value).length === 0) {
ctx.issues.push({
code: "custom",
message: "Update object has to have at least one key to update",
input: ctx.value,
});
}
}),
});
type DebtUpdateObject = Updateable<DB["debts"]>;
const buildSetObjects = (input: z.infer<typeof updateDebtSchema>) => {
const setObject: DebtUpdateObject = omitBy(
{
amount: input.update.amount?.toString(),
timestamp: input.update.timestamp,
note: input.update.note,
currencyCode: input.update.currencyCode,
receiptId: input.update.receiptId,
},
(value) => value === undefined,
);
const reverseSetObject = omitBy(
{
...setObject,
note: undefined,
amount:
input.update.amount === undefined
? undefined
: (-input.update.amount).toString(),
},
(value) => value === undefined,
);
return {
setObject,
reverseSetObject,
};
};
const fetchDebts = async (
ctx: AuthorizedContext,
updates: readonly z.infer<typeof updateDebtSchema>[],
) =>
ctx.database
.selectFrom("debts")
.where((eb) =>
eb(
"debts.id",
"in",
updates.map((update) => update.id),
).and("debts.ownerUserId", "=", ctx.auth.userId),
)
.innerJoin("peers", (qb) =>
qb
.onRef("peers.id", "=", "debts.peerId")
.onRef("peers.ownerUserId", "=", "debts.ownerUserId"),
)
.leftJoin("userSettings", (qb) =>
qb.onRef("peers.connectedUserId", "=", "userSettings.userId"),
)
.leftJoin("peers as peersTheir", (qb) =>
qb
.onRef("peersTheir.connectedUserId", "=", "debts.ownerUserId")
.onRef("peersTheir.ownerUserId", "=", "peers.connectedUserId"),
)
.select([
"debts.id",
"debts.peerId",
"debts.updatedAt",
"debts.note",
"debts.currencyCode",
"debts.amount",
"debts.timestamp",
"debts.receiptId",
"peers.connectedUserId as foreignUserId",
"userSettings.manualAcceptDebts",
"peersTheir.id as theirPeerId",
])
.execute();
type Debt = Awaited<ReturnType<typeof fetchDebts>>[number];
type UpdateWithDebt = ReturnType<typeof buildSetObjects> & {
debt: Debt;
};
const mergeSetObjects = <T extends DebtUpdateObject>(
setObjectA: T,
setObjectB: T,
): T => ({ ...setObjectA, ...setObjectB });
const mergeUpdates = (debtsToUpdate: UpdateWithDebt[]): UpdateWithDebt[] =>
debtsToUpdate.reduce<UpdateWithDebt[]>((acc, debtToUpdate) => {
const previousDebt = acc.find(
({ debt }) => debt.id === debtToUpdate.debt.id,
);
if (!previousDebt) {
return [...acc, debtToUpdate];
}
return [
...acc.filter(({ debt }) => debt.id !== debtToUpdate.debt.id),
{
debt: debtToUpdate.debt,
setObject: mergeSetObjects(
debtToUpdate.setObject,
previousDebt.setObject,
),
reverseSetObject: mergeSetObjects(
debtToUpdate.reverseSetObject,
previousDebt.reverseSetObject,
),
},
];
}, []);
const updateAutoAcceptingDebts = async (
ctx: AuthorizedContext,
debtsToUpdate: UpdateWithDebt[],
) => {
const autoAcceptedData = debtsToUpdate
.map((debtToUpdate) => {
const { debt, setObject, reverseSetObject } = debtToUpdate;
if (!debt.manualAcceptDebts && debt.foreignUserId && debt.theirPeerId) {
return {
id: debt.id,
ownerUserId: debt.foreignUserId,
peerId: debt.theirPeerId,
currencyCode: debt.currencyCode,
amount: (-Number(debt.amount)).toString(),
timestamp: debt.timestamp,
receiptId: debt.receiptId,
...reverseSetObject,
// In case debt doesn't exist - we need to set a new note, not the old one
note: setObject.note || debt.note,
isNew: false,
};
}
return null;
})
.filter(isNonNullish);
if (autoAcceptedData.length === 0) {
return [];
}
const { newDebts } = await upsertAutoAcceptedDebts(
ctx.database,
autoAcceptedData,
);
return debtsToUpdate
.map((debtToUpdate) => {
const newDebtAdded = newDebts.some(
(debt) => debtToUpdate.debt.id === debt.id,
);
if (keys(debtToUpdate.reverseSetObject).length !== 0 || newDebtAdded) {
return debtToUpdate.debt.id;
}
return undefined;
})
.filter(isNonNullish);
};
const updateDebts = async (
ctx: AuthorizedContext,
debtsToUpdate: UpdateWithDebt[],
) => {
if (debtsToUpdate.length === 0) {
return [];
}
const results = await ctx.database.transaction().execute((tx) =>
Promise.all(
debtsToUpdate.map(async (debtToUpdate) => {
const { id, updatedAt } = await tx
.updateTable("debts")
.set(debtToUpdate.setObject)
.where((eb) =>
eb.and({
id: debtToUpdate.debt.id,
ownerUserId: ctx.auth.userId,
}),
)
.returning(["debts.id", "debts.updatedAt"])
.executeTakeFirstOrThrow();
return {
id,
updatedAt,
};
}),
),
);
return results;
};
const queueUpdateDebt = queueCallFactory<
AuthorizedContext,
z.infer<typeof updateDebtSchema>,
{
updatedAt: Temporal.ZonedDateTime;
// `undefined` signifies that peer is local
reverseUpdated: boolean | undefined;
}
>((ctx) => async (updates) => {
const debts = await fetchDebts(ctx, updates);
const updatesOrErrors = updates.map((update) => {
const matchedDebt = debts.find((debt) => debt.id === update.id);
if (!matchedDebt) {
return new TRPCError({
code: "NOT_FOUND",
message: `Debt "${update.id}" does not exist on user "${ctx.auth.email}".`,
});
}
return { ...buildSetObjects(update), debt: matchedDebt };
});
const debtsToUpdate = updatesOrErrors.filter(
(
updateOrError,
): updateOrError is Exclude<typeof updateOrError, TRPCError> =>
!(updateOrError instanceof TRPCError),
);
const mergedDebts = mergeUpdates(debtsToUpdate);
const [reverseUpdatedDebtsIds, updatedDebts] = await Promise.all([
updateAutoAcceptingDebts(ctx, mergedDebts),
updateDebts(ctx, mergedDebts),
]);
const localPeerIds = unique(
debts
.filter((debt) => debt.foreignUserId === null)
.map((debt) => debt.peerId),
);
return updatesOrErrors.map((updateOrError) => {
if (updateOrError instanceof TRPCError) {
return updateOrError;
}
const matchedDebt = updatedDebts.find(
(debt) => debt.id === updateOrError.debt.id,
);
/* c8 ignore start */
if (!matchedDebt) {
return new TRPCError({
code: "INTERNAL_SERVER_ERROR",
message: `Expected to have an updated debt id "${updateOrError.debt.id}".`,
});
}
/* c8 ignore stop */
return {
updatedAt: matchedDebt.updatedAt,
reverseUpdated: localPeerIds.includes(updateOrError.debt.peerId)
? undefined
: reverseUpdatedDebtsIds.includes(updateOrError.debt.id),
};
});
});
export const procedure = authProcedure
.meta({
title: "Update debt",
description:
"Updates a debt owned by the current user, auto-updating the counterparty's mirrored debt unless they require manual acceptance.",
})
.input(updateDebtSchema)
.mutation(queueUpdateDebt);
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