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import { IndexedDBAdapter } from "@/services/storage/indexeddb-adapter";
import type { StorageMigration } from "./base";
import { StorageVersionManager } from "./version-manager";
export interface StorageMigrationResult {
fromVersion: number;
toVersion: number;
migrated: boolean;
}
export type StorageMigrationCallbacks = {
onMigrationStart?: ({
fromVersion,
toVersion,
}: {
fromVersion: number;
toVersion: number;
}) => void;
onMigrationComplete?: ({
fromVersion,
toVersion,
}: {
fromVersion: number;
toVersion: number;
}) => void;
};
type ProjectRecord = Record<string, unknown>;
export async function runStorageMigrations({
migrations,
versionManager = new StorageVersionManager(),
callbacks,
}: {
migrations: StorageMigration[];
versionManager?: StorageVersionManager;
callbacks?: StorageMigrationCallbacks;
}): Promise<StorageMigrationResult> {
const versionRecord = await versionManager.getVersionRecord();
const inferredVersion = versionRecord
? null
: await inferStorageVersionFromProjects();
const fromVersion =
versionRecord?.inProgress?.from ??
versionRecord?.version ??
inferredVersion ??
0;
if (!versionRecord) {
await versionManager.setVersion({ version: fromVersion });
}
const orderedMigrations = [...migrations].sort((a, b) => a.from - b.from);
let currentVersion = fromVersion;
for (const migration of orderedMigrations) {
if (migration.from !== currentVersion) {
continue;
}
await versionManager.setInProgress({
from: migration.from,
to: migration.to,
});
callbacks?.onMigrationStart?.({
fromVersion: migration.from,
toVersion: migration.to,
});
await migration.run();
currentVersion = migration.to;
await versionManager.setVersion({ version: currentVersion });
await versionManager.clearInProgress();
callbacks?.onMigrationComplete?.({
fromVersion: migration.from,
toVersion: migration.to,
});
}
return {
fromVersion,
toVersion: currentVersion,
migrated: currentVersion !== fromVersion,
};
}
async function inferStorageVersionFromProjects(): Promise<number> {
const projectsAdapter = new IndexedDBAdapter<unknown>(
"video-editor-projects",
"projects",
1,
);
const projects = await projectsAdapter.getAll();
if (projects.length === 0) {
return 0;
}
let lowestVersion = Number.POSITIVE_INFINITY;
for (const project of projects) {
const projectVersion = checkProjectVersion({ project });
if (projectVersion < lowestVersion) {
lowestVersion = projectVersion;
}
}
if (lowestVersion === Number.POSITIVE_INFINITY) {
return 0;
}
return lowestVersion;
}
function checkProjectVersion({ project }: { project: unknown }): number {
if (!isRecord(project)) {
return 0;
}
const versionValue = project.version;
// v2 and up
if (typeof versionValue === "number") {
return versionValue;
}
// v1 (got scenes)
const scenesValue = project.scenes;
if (Array.isArray(scenesValue) && scenesValue.length > 0) {
return 1;
}
// v0 (didn't have scenes)
return 0;
}
function isRecord(value: unknown): value is ProjectRecord {
return typeof value === "object" && value !== null;
}
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