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082b9755db
Previously, we were re-inserting all items regardless of whether they were changed or not. This raised a lot of issues, not to mention unnecessary load on our servers because after each migration all the data is re-synced. Since migration takes place independently on each device, this multiplies exponentially. Hopefully after this update, this will only happen much more granually.
86 lines
2.6 KiB
JavaScript
86 lines
2.6 KiB
JavaScript
/*
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This file is part of the Notesnook project (https://notesnook.com/)
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Copyright (C) 2022 Streetwriters (Private) Limited
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import { sendMigrationProgressEvent } from "../common";
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import { migrateCollection, migrateItem } from "../migrations";
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class Migrator {
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async migrate(db, collections, get, version, restore = false) {
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for (let collection of collections) {
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if (!collection.index || !collection.dbCollection) continue;
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if (collection.dbCollection.collectionName)
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sendMigrationProgressEvent(
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db.eventManager,
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collection.dbCollection.collectionName,
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0,
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0
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);
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await migrateCollection(collection.dbCollection, version);
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const index = (await collection.index()) || [];
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for (var i = 0; i < index.length; ++i) {
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let id = index[i];
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let item = get(id);
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if (!item) {
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continue;
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}
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if (collection.dbCollection.collectionName)
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sendMigrationProgressEvent(
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db.eventManager,
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collection.dbCollection.collectionName,
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index.length,
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i + 1
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);
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// check if item is permanently deleted or just a soft delete
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if (item.deleted && !item.type) {
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await collection.dbCollection?._collection?.addItem(item);
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continue;
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}
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const itemId = item.id;
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const migrated = await migrateItem(
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item,
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version,
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item.type || collection.type || collection.dbCollection.type,
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db
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);
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if (migrated || restore) {
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if (collection.dbCollection.merge) {
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await collection.dbCollection.merge(item);
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} else if (collection.dbCollection.add) {
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await collection.dbCollection.add(item);
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}
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// if id changed after migration, we need to delete the old one.
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if (item.id !== itemId) {
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await collection.dbCollection?._collection?.deleteItem(itemId);
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}
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}
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}
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}
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return true;
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}
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}
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export default Migrator;
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