77 lines
2.1 KiB
TypeScript
77 lines
2.1 KiB
TypeScript
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export type TkvEntry<K extends Deno.KvKey, T> = {
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key: readonly [...K];
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value: T;
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versionstamp: string;
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};
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export type TkvEntryMaybe<K extends Deno.KvKey, T> = TkvEntry<K, T> | {
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key: readonly [...K];
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value: null;
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versionstamp: null;
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};
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export type TkvListSelector<K extends Deno.KvKey> =
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| { prefix: KvKeyPrefix<K> }
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| { prefix: KvKeyPrefix<K>; start: readonly [...K] }
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| { prefix: KvKeyPrefix<K>; end: readonly [...K] }
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| { start: readonly [...K]; end: readonly [...K] };
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export type KvKeyPrefix<Key extends Deno.KvKey> = Key extends readonly [infer Prefix, ...infer Rest]
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? readonly [Prefix] | readonly [Prefix, ...Rest]
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: never;
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/**
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* Typed wrapper for {@link Deno.Kv}
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*/
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export class Tkv<K extends Deno.KvKey, T> {
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constructor(readonly db: Deno.Kv) {}
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get(
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key: readonly [...K],
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options: Parameters<Deno.Kv["get"]>[1] = {},
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): Promise<TkvEntryMaybe<K, T>> {
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return this.db.get<T>(key, options) as any;
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}
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set(
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key: readonly [...K],
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value: T,
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options: Parameters<Deno.Kv["set"]>[2] = {},
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): ReturnType<Deno.Kv["set"]> {
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return this.db.set(key, value, options);
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}
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atomicSet(
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key: readonly [...K],
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versionstamp: Parameters<Deno.AtomicOperation["check"]>[0]["versionstamp"],
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value: T,
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options: Parameters<Deno.AtomicOperation["set"]>[2] = {},
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): ReturnType<Deno.AtomicOperation["commit"]> {
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return this.db.atomic()
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.check({ key, versionstamp })
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.set(key, value, options)
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.commit();
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}
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delete(key: readonly [...K]): ReturnType<Deno.Kv["delete"]> {
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return this.db.delete(key);
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}
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atomicDelete(
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key: readonly [...K],
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versionstamp: Parameters<Deno.AtomicOperation["check"]>[0]["versionstamp"],
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): ReturnType<Deno.AtomicOperation["commit"]> {
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return this.db.atomic()
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.check({ key, versionstamp })
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.delete(key)
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.commit();
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}
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list(
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selector: TkvListSelector<K>,
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options: Parameters<Deno.Kv["list"]>[1] = {},
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): AsyncIterableIterator<TkvEntry<K, T>> {
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return this.db.list<T>(selector as Deno.KvListSelector, options) as any;
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}
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}
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