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import { z } from "zod";
import type { UserId } from "~db/ids";
import { queueCallFactory } from "~web/handlers/batch";
import type { AuthorizedContext } from "~web/handlers/context";
import { authProcedure } from "~web/handlers/trpc";
import { debtIdSchema } from "~web/handlers/validation";
const acceptIntentionSchema = z.strictObject({
id: debtIdSchema,
});
type Input = z.infer<typeof acceptIntentionSchema>;
const fetchIntentions = (ctx: AuthorizedContext, inputs: readonly Input[]) =>
ctx.database
.selectFrom("debts as theirDebts")
.where((eb) =>
eb(
"theirDebts.id",
"in",
inputs.map((input) => input.id),
).and("theirDebts.ownerUserId", "<>", ctx.auth.userId),
)
.innerJoin("peers", (qb) =>
qb
.onRef("peers.connectedUserId", "=", "theirDebts.ownerUserId")
.on("peers.ownerUserId", "=", ctx.auth.userId),
)
.leftJoin("debts as selfDebts", (qb) =>
qb
.onRef("selfDebts.id", "=", "theirDebts.id")
.on("selfDebts.ownerUserId", "=", ctx.auth.userId),
)
.select([
"theirDebts.id",
"theirDebts.ownerUserId",
"theirDebts.updatedAt",
"theirDebts.amount",
"theirDebts.note",
"theirDebts.timestamp",
"theirDebts.currencyCode",
"theirDebts.receiptId",
"selfDebts.id as selfId",
"peers.id as foreignPeerId",
])
.execute();
type FetchedIntention = Awaited<ReturnType<typeof fetchIntentions>>[number];
const acceptUpdatedIntentions = async (
ctx: AuthorizedContext,
ownerUserId: UserId,
intentions: Pick<
FetchedIntention,
"id" | "amount" | "currencyCode" | "selfId" | "timestamp"
>[],
) => {
const updatedIntentions = intentions.filter((intention) => intention.selfId);
if (updatedIntentions.length === 0) {
return [];
}
return ctx.database.transaction().execute((tx) =>
Promise.all(
updatedIntentions.map(async (intentionToUpdate) => {
const { id, updatedAt } = await tx
.updateTable("debts")
.set({
amount: (Number(intentionToUpdate.amount) * -1).toString(),
currencyCode: intentionToUpdate.currencyCode,
timestamp: intentionToUpdate.timestamp,
})
.where((eb) =>
eb.and({
id: intentionToUpdate.id,
ownerUserId,
}),
)
.returning(["debts.id", "debts.updatedAt"])
.executeTakeFirstOrThrow();
return {
id,
updatedAt,
};
}),
),
);
};
export const acceptNewIntentions = async (
ctx: AuthorizedContext,
ownerUserId: UserId,
intentions: Pick<
FetchedIntention,
| "id"
| "selfId"
| "foreignPeerId"
| "currencyCode"
| "amount"
| "timestamp"
| "note"
| "receiptId"
>[],
) => {
const createdIntentions = intentions.filter((intention) => !intention.selfId);
if (createdIntentions.length === 0) {
return [];
}
return ctx.database
.insertInto("debts")
.values(
createdIntentions.map((intention) => ({
id: intention.id,
ownerUserId,
peerId: intention.foreignPeerId,
currencyCode: intention.currencyCode,
amount: (Number(intention.amount) * -1).toString(),
timestamp: intention.timestamp,
note: intention.note,
receiptId: intention.receiptId,
})),
)
.returning(["debts.id", "debts.updatedAt"])
.execute();
};
const queueAcceptIntention = queueCallFactory<
AuthorizedContext,
Input,
{ updatedAt: Temporal.ZonedDateTime }
>((ctx) => async (inputs) => {
const intentions = await fetchIntentions(ctx, inputs);
const intentionsOrErrors = inputs.map((input) => {
const matchedIntention = intentions.find(
(intention) => intention.id === input.id,
);
if (!matchedIntention) {
return new TRPCError({
code: "NOT_FOUND",
message: `Intention for debt "${input.id}" is not found.`,
});
}
return matchedIntention;
});
const intentionsToAccept = intentionsOrErrors.filter(
(
intentionOrError,
): intentionOrError is Exclude<typeof intentionOrError, TRPCError> =>
!(intentionOrError instanceof TRPCError),
);
const [updatedIntentions, newIntentions] = await Promise.all([
acceptUpdatedIntentions(ctx, ctx.auth.userId, intentionsToAccept),
acceptNewIntentions(ctx, ctx.auth.userId, intentionsToAccept),
]);
return intentionsOrErrors.map((intentionOrError) => {
if (intentionOrError instanceof TRPCError) {
return intentionOrError;
}
const matchedNewIntention = newIntentions.find(
(intention) => intention.id === intentionOrError.id,
);
const matchedUpdatedIntention = updatedIntentions.find(
(intention) => intention.id === intentionOrError.id,
);
const anyIntention = matchedNewIntention || matchedUpdatedIntention;
/* c8 ignore start */
if (!anyIntention) {
return new TRPCError({
code: "INTERNAL_SERVER_ERROR",
message: `Expected to have an accepted intention id "${intentionOrError.id}".`,
});
}
/* c8 ignore stop */
return { updatedAt: anyIntention.updatedAt };
});
});
export const procedure = authProcedure
.meta({
title: "Accept debt intention",
description:
"Accepts a counterparty's pending debt change for a given debt id by creating or updating the mirrored debt on the current user.",
})
.input(acceptIntentionSchema)
.mutation(queueAcceptIntention);
|