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import { and, inArray, isNotNull, lt } from "drizzle-orm";
import { db } from "../db/index.js";
import {
cards,
decks,
noteFieldTypes,
noteFieldValues,
notes,
noteTypes,
reviewLogs,
} from "../db/schema.js";
export interface PurgeResult {
reviewLogs: number;
noteFieldValues: number;
cards: number;
notes: number;
noteFieldTypes: number;
noteTypes: number;
decks: number;
}
export interface PurgeOptions {
retentionDays: number;
batchSize?: number;
}
export interface PurgeRepository {
purgeDeletedRecords(options: PurgeOptions): Promise<PurgeResult>;
}
const DEFAULT_BATCH_SIZE = 1000;
export const purgeRepository: PurgeRepository = {
async purgeDeletedRecords(options: PurgeOptions): Promise<PurgeResult> {
const { retentionDays, batchSize = DEFAULT_BATCH_SIZE } = options;
const cutoffDate = new Date();
cutoffDate.setDate(cutoffDate.getDate() - retentionDays);
const result: PurgeResult = {
reviewLogs: 0,
noteFieldValues: 0,
cards: 0,
notes: 0,
noteFieldTypes: 0,
noteTypes: 0,
decks: 0,
};
await db.transaction(async (tx) => {
// 1. Delete review_logs for cards that will be purged
const cardsToPurge = await tx
.select({ id: cards.id })
.from(cards)
.where(and(isNotNull(cards.deletedAt), lt(cards.deletedAt, cutoffDate)))
.limit(batchSize);
if (cardsToPurge.length > 0) {
const cardIds = cardsToPurge.map((c) => c.id);
const deletedReviewLogs = await tx
.delete(reviewLogs)
.where(inArray(reviewLogs.cardId, cardIds))
.returning({ id: reviewLogs.id });
result.reviewLogs = deletedReviewLogs.length;
}
// 2. Delete note_field_values for notes that will be purged
const notesToPurge = await tx
.select({ id: notes.id })
.from(notes)
.where(and(isNotNull(notes.deletedAt), lt(notes.deletedAt, cutoffDate)))
.limit(batchSize);
if (notesToPurge.length > 0) {
const noteIds = notesToPurge.map((n) => n.id);
const deletedNoteFieldValues = await tx
.delete(noteFieldValues)
.where(inArray(noteFieldValues.noteId, noteIds))
.returning({ id: noteFieldValues.id });
result.noteFieldValues = deletedNoteFieldValues.length;
}
// 3. Delete cards
const deletedCards = await tx
.delete(cards)
.where(and(isNotNull(cards.deletedAt), lt(cards.deletedAt, cutoffDate)))
.returning({ id: cards.id });
result.cards = deletedCards.length;
// 4. Delete notes
const deletedNotes = await tx
.delete(notes)
.where(and(isNotNull(notes.deletedAt), lt(notes.deletedAt, cutoffDate)))
.returning({ id: notes.id });
result.notes = deletedNotes.length;
// 5. Delete note_field_types for note_types that will be purged
const noteTypesToPurge = await tx
.select({ id: noteTypes.id })
.from(noteTypes)
.where(
and(
isNotNull(noteTypes.deletedAt),
lt(noteTypes.deletedAt, cutoffDate),
),
)
.limit(batchSize);
if (noteTypesToPurge.length > 0) {
const noteTypeIds = noteTypesToPurge.map((nt) => nt.id);
const deletedNoteFieldTypes = await tx
.delete(noteFieldTypes)
.where(inArray(noteFieldTypes.noteTypeId, noteTypeIds))
.returning({ id: noteFieldTypes.id });
result.noteFieldTypes = deletedNoteFieldTypes.length;
}
// 6. Delete note_types
const deletedNoteTypes = await tx
.delete(noteTypes)
.where(
and(
isNotNull(noteTypes.deletedAt),
lt(noteTypes.deletedAt, cutoffDate),
),
)
.returning({ id: noteTypes.id });
result.noteTypes = deletedNoteTypes.length;
// 7. Delete decks
const deletedDecks = await tx
.delete(decks)
.where(and(isNotNull(decks.deletedAt), lt(decks.deletedAt, cutoffDate)))
.returning({ id: decks.id });
result.decks = deletedDecks.length;
});
return result;
},
};
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