yumechi-no-kuni/src/server/api/get-params.ts
2018-10-26 14:38:34 +09:00

29 lines
667 B
TypeScript

import { Context } from 'cafy';
type Defs = {
params: { [key: string]: Context<any> }
};
export default function <T extends Defs>(defs: T, params: any): [{
[P in keyof T['params']]: ReturnType<T['params'][P]['get']>[0];
}, Error] {
const x: any = {};
let err: Error = null;
Object.keys(defs.params).some(k => {
const [v, e] = defs.params[k].get(params[k]);
if (e) {
err = new Error(e.message);
err.name = 'INVALID_PARAM';
(err as any).param = k;
return true;
} else {
if (v === undefined && defs.params[k].data.default) {
x[k] = defs.params[k].data.default;
} else {
x[k] = v;
}
return false;
}
});
return [x, err];
}