@anyhowstep/ts-route-server/src/SchemaMiddleware.ts

import {Schema, SchemaUtil} from "@anyhowstep/schema";
import * as express from "express";

export class SchemaMiddleware {
    public static Create<T> (name : string, getMixed : (req : express.Request) => any, schema? : Schema<T>) {
        if (schema == null) {
            return (_req : express.Request, _res : express.Response, next : express.NextFunction) => {
                next();
            };
        } else {
            return (req : express.Request, res : express.Response, next : express.NextFunction) => {
                SchemaUtil.Fill(
                    name,
                    getMixed(req),
                    schema
                ).then(() => {
                    next();
                }).catch((err) => {
                    res.status(400).json(err);
                });
            };
        }
    }
}