mirror of
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53 lines
1.6 KiB
TypeScript
53 lines
1.6 KiB
TypeScript
import * as fs from 'fs';
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import { ILocalUser } from '../../models/user';
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import { IApp } from '../../models/app';
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import { IEndpointMeta } from './endpoints';
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type Params<T extends IEndpointMeta> = {
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[P in keyof T['params']]: T['params'][P]['transform'] extends Function
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? ReturnType<T['params'][P]['transform']>
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: ReturnType<T['params'][P]['validator']['get']>[0];
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};
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export default function <T extends IEndpointMeta>(meta: T, cb: (params: Params<T>, user: ILocalUser, app: IApp, file?: any, cleanup?: Function) => Promise<any>): (params: any, user: ILocalUser, app: IApp, file?: any) => Promise<any> {
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return (params: any, user: ILocalUser, app: IApp, file?: any) => {
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function cleanup() {
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fs.unlink(file.path, () => {});
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}
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if (meta.requireFile && file == null) return Promise.reject('file required');
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const [ps, pserr] = getParams(meta, params);
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if (pserr) {
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if (file) cleanup();
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return Promise.reject(pserr);
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}
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return cb(ps, user, app, file, cleanup);
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};
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}
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function getParams<T extends IEndpointMeta>(defs: T, params: any): [Params<T>, Error] {
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if (defs.params == null) return [params, null];
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const x: any = {};
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let err: Error = null;
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Object.entries(defs.params).some(([k, def]) => {
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const [v, e] = def.validator.get(params[k]);
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if (e) {
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err = new Error(e.message);
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err.name = 'INVALID_PARAM';
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(err as any).param = k;
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return true;
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} else {
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if (v === undefined && def.hasOwnProperty('default')) {
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x[k] = def.default;
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} else {
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x[k] = v;
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}
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if (def.transform) x[k] = def.transform(x[k]);
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return false;
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}
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});
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return [x, err];
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}
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