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// different version of lambert-server instanceOf with discord error format
import { NextFunction, Request, Response } from "express";
import { Tuple } from "lambert-server";
import "missing-native-js-functions";
export const OPTIONAL_PREFIX = "$";
export const EMAIL_REGEX =
/^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
export function check(schema: any) {
return (req: Request, res: Response, next: NextFunction) => {
try {
const result = instanceOf(schema, req.body, { path: "body", req, ref: { obj: null, key: "" } });
if (result === true) return next();
throw result;
} catch (error) {
return res.status(400).json({ code: 50035, message: "Invalid Form Body", success: false, errors: error });
}
};
}
export function FieldErrors(fields: Record<string, { code?: string; message: string }>) {
return new FieldError(
50035,
"Invalid Form Body",
fields.map(({ message, code }) => ({
_errors: [
{
message,
code: code || "BASE_TYPE_INVALID"
}
]
}))
);
}
// TODO: implement Image data type: Data URI scheme that supports JPG, GIF, and PNG formats. An example Data URI format is: data:image/jpeg;base64,BASE64_ENCODED_JPEG_IMAGE_DATA
// Ensure you use the proper content type (image/jpeg, image/png, image/gif) that matches the image data being provided.
export class FieldError extends Error {
constructor(public code: string | number, public message: string, public errors?: any) {
super(message);
}
}
export class Email {
constructor(public email: string) {}
check() {
return !!this.email.match(EMAIL_REGEX);
}
}
export class Length {
constructor(public type: any, public min: number, public max: number) {}
check(value: string) {
if (typeof value === "string" || Array.isArray(value)) return value.length >= this.min && value.length <= this.max;
if (typeof value === "number" || typeof value === "bigint") return value >= this.min && value <= this.max;
return false;
}
}
export function instanceOf(
type: any,
value: any,
{
path = "",
optional = false,
errors = {},
req,
ref
}: { path?: string; optional?: boolean; errors?: any; req: Request; ref?: { key: string | number; obj: any } }
): Boolean {
if (!ref) ref = { obj: null, key: "" };
if (!path) path = "body";
if (!type) return true; // no type was specified
try {
if (value == null) {
if (optional) return true;
throw new FieldError("BASE_TYPE_REQUIRED", req.t("common:field.BASE_TYPE_REQUIRED"));
}
switch (type) {
case String:
value = `${value}`;
ref.obj[ref.key] = value;
if (typeof value === "string") return true;
throw new FieldError("BASE_TYPE_STRING", req.t("common:field.BASE_TYPE_STRING"));
case Number:
value = Number(value);
ref.obj[ref.key] = value;
if (typeof value === "number" && !isNaN(value)) return true;
throw new FieldError("BASE_TYPE_NUMBER", req.t("common:field.BASE_TYPE_NUMBER"));
case BigInt:
try {
value = BigInt(value);
ref.obj[ref.key] = value;
if (typeof value === "bigint") return true;
} catch (error) {}
throw new FieldError("BASE_TYPE_BIGINT", req.t("common:field.BASE_TYPE_BIGINT"));
case Boolean:
if (value == "true") value = true;
if (value == "false") value = false;
ref.obj[ref.key] = value;
if (typeof value === "boolean") return true;
throw new FieldError("BASE_TYPE_BOOLEAN", req.t("common:field.BASE_TYPE_BOOLEAN"));
case Email:
if (new Email(value).check()) return true;
throw new FieldError("EMAIL_TYPE_INVALID_EMAIL", req.t("common:field.EMAIL_TYPE_INVALID_EMAIL"));
case Date:
value = new Date(value);
ref.obj[ref.key] = value;
// value.getTime() can be < 0, if it is before 1970
if (!isNaN(value)) return true;
throw new FieldError("DATE_TYPE_PARSE", req.t("common:field.DATE_TYPE_PARSE"));
}
if (typeof type === "object") {
if (Array.isArray(type)) {
if (!Array.isArray(value)) throw new FieldError("BASE_TYPE_ARRAY", req.t("common:field.BASE_TYPE_ARRAY"));
if (!type.length) return true; // type array didn't specify any type
return (
value.every((val, i) => {
errors[i] = {};
if (
instanceOf(type[0], val, {
path: `${path}[${i}]`,
optional,
errors: errors[i],
req,
ref: { key: i, obj: value }
}) === true
) {
delete errors[i];
return true;
}
return false;
}) || errors
);
} else if (type?.constructor?.name != "Object") {
if (type instanceof Tuple) {
if ((<Tuple>type).types.some((x) => instanceOf(x, value, { path, optional, errors, req, ref }))) return true;
throw new FieldError("BASE_TYPE_CHOICES", req.t("common:field.BASE_TYPE_CHOICES", { types: type.types }));
} else if (type instanceof Length) {
let length = <Length>type;
if (instanceOf(length.type, value, { path, optional, req, ref, errors }) !== true) return errors;
let val = ref.obj[ref.key];
if ((<Length>type).check(val)) return true;
throw new FieldError(
"BASE_TYPE_BAD_LENGTH",
req.t("common:field.BASE_TYPE_BAD_LENGTH", {
length: `${type.min} - ${type.max}`
})
);
}
try {
if (value instanceof type) return true;
} catch (error) {
throw new FieldError("BASE_TYPE_CLASS", req.t("common:field.BASE_TYPE_CLASS", { type }));
}
}
if (typeof value !== "object") throw new FieldError("BASE_TYPE_OBJECT", req.t("common:field.BASE_TYPE_OBJECT"));
const diff = Object.keys(value).missing(
Object.keys(type).map((x) => (x.startsWith(OPTIONAL_PREFIX) ? x.slice(OPTIONAL_PREFIX.length) : x))
);
if (diff.length) throw new FieldError("UNKOWN_FIELD", req.t("common:field.UNKOWN_FIELD", { key: diff }));
return (
Object.keys(type).every((key) => {
let newKey = key;
const OPTIONAL = key.startsWith(OPTIONAL_PREFIX);
if (OPTIONAL) newKey = newKey.slice(OPTIONAL_PREFIX.length);
errors[newKey] = {};
if (
instanceOf(type[key], value[newKey], {
path: `${path}.${newKey}`,
optional: OPTIONAL,
errors: errors[newKey],
req,
ref: { key: newKey, obj: value }
}) === true
) {
delete errors[newKey];
return true;
}
return false;
}) || errors
);
} else if (typeof type === "number" || typeof type === "string" || typeof type === "boolean") {
if (value === type) return true;
throw new FieldError("BASE_TYPE_CONSTANT", req.t("common:field.BASE_TYPE_CONSTANT", { value: type }));
} else if (typeof type === "bigint") {
if (BigInt(value) === type) return true;
throw new FieldError("BASE_TYPE_CONSTANT", req.t("common:field.BASE_TYPE_CONSTANT", { value: type }));
}
return type == value;
} catch (error) {
let e = error as FieldError;
errors._errors = [{ message: e.message, code: e.code }];
return errors;
}
}
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