mirror of
https://github.com/spacebarchat/server.git
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122 lines
3.9 KiB
TypeScript
122 lines
3.9 KiB
TypeScript
// different version of lambert-server instanceOf with discord error format
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import { NextFunction, Request, Response } from "express";
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import { Tuple } from "lambert-server";
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const OPTIONAL_PREFIX = "$";
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export function check(schema: any) {
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return (req: Request, res: Response, next: NextFunction) => {
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try {
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const result = instanceOf(schema, req.body, { path: "body" });
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if (result === true) return next();
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throw result;
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} catch (error) {
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return res.status(400).json({ code: 50035, message: "Invalid Form Body", success: false, errors: error });
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}
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};
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}
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class FieldError extends Error {
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constructor(public code: string, public message: string) {
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super(message);
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}
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}
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export function instanceOf(
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type: any,
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value: any,
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{ path = "", optional = false, errors = {} }: { path?: string; optional?: boolean; errors?: any } = {}
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): Boolean {
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try {
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if (!type) return true; // no type was specified
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if (value == null) {
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if (optional) return true;
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throw new FieldError("BASE_TYPE_REQUIRED", `This field is required`);
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}
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switch (type) {
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case String:
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if (typeof value === "string") return true;
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throw new FieldError("BASE_TYPE_STRING", `This field must be a string`);
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case Number:
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value = Number(value);
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if (typeof value === "number" && !isNaN(value)) return true;
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throw new FieldError("BASE_TYPE_NUMBER", `This field must be a number`);
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case BigInt:
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try {
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value = BigInt(value);
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if (typeof value === "bigint") return true;
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} catch (error) {}
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throw new FieldError("BASE_TYPE_BIGINT", `This field must be a bigint`);
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case Boolean:
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if (value == "true") value = true;
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if (value == "false") value = false;
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if (typeof value === "boolean") return true;
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throw new FieldError("BASE_TYPE_BOOLEAN", `This field must be a boolean`);
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}
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if (typeof type === "object") {
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if (type?.constructor?.name != "Object") {
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if (type instanceof Tuple) {
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if ((<Tuple>type).types.some((x) => instanceOf(x, value, { path, optional, errors }))) return true;
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throw new FieldError("BASE_TYPE_CHOICES", `This field must be one of (${type.types})`);
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}
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if (value instanceof type) return true;
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throw new FieldError("BASE_TYPE_CLASS", `This field must be an instance of ${type}`);
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}
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if (typeof value !== "object") throw new FieldError("BASE_TYPE_OBJECT", `This field must be a object`);
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if (Array.isArray(type)) {
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if (!Array.isArray(value)) throw new FieldError("BASE_TYPE_ARRAY", `This field must be an array`);
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if (!type.length) return true; // type array didn't specify any type
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return (
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value.every((val, i) => {
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errors[i] = {};
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return (
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instanceOf(type[0], val, { path: `${path}[${i}]`, optional, errors: errors[i] }) === true
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);
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}) || errors
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);
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}
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const diff = Object.keys(value).missing(
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Object.keys(type).map((x) => (x.startsWith(OPTIONAL_PREFIX) ? x.slice(OPTIONAL_PREFIX.length) : x))
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);
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if (diff.length) throw new FieldError("UNKOWN_FIELD", `Unkown key ${diff}`);
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return (
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Object.keys(type).every((key) => {
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let newKey = key;
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const OPTIONAL = key.startsWith(OPTIONAL_PREFIX);
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if (OPTIONAL) newKey = newKey.slice(OPTIONAL_PREFIX.length);
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errors[key] = {};
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return (
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instanceOf(type[key], value[newKey], {
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path: `${path}.${newKey}`,
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optional: OPTIONAL,
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errors: errors[key],
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}) === true
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);
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}) || errors
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);
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} else if (typeof type === "number" || typeof type === "string" || typeof type === "boolean") {
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if (value === type) return true;
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throw new FieldError("BASE_TYPE_CONSTANT", `This field must be ${value}`);
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} else if (typeof type === "bigint") {
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if (BigInt(value) === type) return true;
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throw new FieldError("BASE_TYPE_CONSTANT", `This field must be ${value}`);
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}
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return type == value;
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} catch (error) {
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let e = error as FieldError;
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errors._errors = [{ message: e.message, code: e.code }];
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return errors;
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}
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}
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