Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import {
absolute,
equal,
lessThan,
negate,
plus,
} from "../../tr8-script/domain/utils/math.js";
import { JournalEntry, JournalTxLog } from "./journal-events.js";
@autoInjectable()
class JournalEntryMapper {
group(journals: JournalTxLog[]): JournalTxLog[][] {
const grouped: Record<string, JournalTxLog[]> = journals.reduce(
(acc, j) => {
// Group by both id and subId to separate events from different subIds
const groupKey = j.subId ? `${j.id}-${j.subId}` : j.id;
acc[groupKey] = [...(acc[groupKey] ?? []), j];
return acc;
},
{} as Record<string, JournalTxLog[]>,
);
const result = Object.entries(grouped).map(([_, journals]) => journals);
return result;
}
split(journals: JournalTxLog[]): [JournalTxLog[], JournalTxLog[]] {
const deducted: JournalTxLog[] = [];
const added: JournalTxLog[] = [];
for (const j of journals) {
if (lessThan(j.change, { amount: 0n, scale: 0n })) {
deducted.push(j);
} else {
added.push(j);
}
}
return [deducted, added];
}
sort(journals: JournalTxLog[]): JournalTxLog[] {
// Sort journals by absolute value of change
return journals.sort((a, b) => {
const [a1, b1] = [absolute(a.change), absolute(b.change)];
if (lessThan(a1, b1)) {
return -1;
} else if (lessThan(b1, a1)) {
return 1;
} else {
return 0;
}
});
}
convert(deficit: JournalTxLog[], surplus: JournalTxLog[]): JournalEntry[] {
const ret: JournalEntry[] = [];
let dp = 0;
let sp = 0;
while (dp < deficit.length && sp < surplus.length) {
const d = deficit[dp]!;
const s = surplus[sp]!;
const dc = negate(d.change);
const sc = s.change;
if (equal(dc, sc)) {
ret.push({
type: "CREDIT",
amount: s.change,
book: d.book,
account: d.account,
});
ret.push({
type: "DEBIT",
amount: s.change,
book: s.book,
account: s.account,
});
dp++;
sp++;
} else if (lessThan(dc, sc)) {
const change = dc;
ret.push({
type: "CREDIT",
amount: change,
book: d.book,
account: d.account,
});
ret.push({
type: "DEBIT",
amount: change,
book: s.book,
account: s.account,
});
surplus[sp]!.change = plus(s.change, d.change);
dp++;
} else {
ret.push({
type: "CREDIT",
amount: s.change,
book: d.book,
account: d.account,
});
ret.push({
type: "DEBIT",
amount: s.change,
book: s.book,
account: s.account,
});
deficit[dp]!.change = plus(d.change, s.change);
sp++;
}
}
return ret;
}
mapEntrySingle(journals: JournalTxLog[]): JournalEntry[] {
const [deducted, added] = this.split(journals);
const deficit = this.sort(deducted);
const surplus = this.sort(added);
return this.convert(deficit, surplus);
}
map(journals: JournalTxLog[]): JournalEntry[] {
return this.group(journals)
.map((x) => this.mapEntrySingle(x))
.flat();
}
}
export { JournalEntryMapper };
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