27 lines
618 B
JavaScript
27 lines
618 B
JavaScript
|
export function levelup(store) {
|
||
|
|
return Object.assign(Object.create(store), {
|
||
|
|
get(key, options, callback) {
|
||
|
|
let result = store.get(key);
|
||
|
|
if (typeof options == 'function')
|
||
|
|
callback = options;
|
||
|
|
if (callback) {
|
||
|
|
if (result === undefined)
|
||
|
|
callback(new NotFoundError());
|
||
|
|
else
|
||
|
|
callback(null, result);
|
||
|
|
} else {
|
||
|
|
if (result === undefined)
|
||
|
|
return Promise.reject(new NotFoundError());
|
||
|
|
else
|
||
|
|
return Promise.resolve(result);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
});
|
||
|
|
}
|
||
|
|
class NotFoundError extends Error {
|
||
|
|
constructor(message) {
|
||
|
|
super(message);
|
||
|
|
this.name = 'NotFoundError';
|
||
|
|
this.notFound = true;
|
||
|
|
}
|
||
|
|
}
|