generated from sapphiredev/sapphire-template
/
MapValidator.ts
47 lines (39 loc) · 1.76 KB
/
MapValidator.ts
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import type { IConstraint } from '../constraints/base/IConstraint';
import type { BaseError } from '../lib/errors/BaseError';
import { CombinedPropertyError } from '../lib/errors/CombinedPropertyError';
import { ValidationError } from '../lib/errors/ValidationError';
import { Result } from '../lib/Result';
import { BaseValidator } from './imports';
export class MapValidator<K, V> extends BaseValidator<Map<K, V>> {
private readonly keyValidator: BaseValidator<K>;
private readonly valueValidator: BaseValidator<V>;
public constructor(keyValidator: BaseValidator<K>, valueValidator: BaseValidator<V>, constraints: readonly IConstraint<Map<K, V>>[] = []) {
super(constraints);
this.keyValidator = keyValidator;
this.valueValidator = valueValidator;
}
protected override clone(): this {
return Reflect.construct(this.constructor, [this.keyValidator, this.valueValidator, this.constraints]);
}
protected handle(value: unknown): Result<Map<K, V>, ValidationError | CombinedPropertyError> {
if (!(value instanceof Map)) {
return Result.err(new ValidationError('s.map(K, V)', 'Expected a map', value));
}
if (!this.shouldRunConstraints) {
return Result.ok(value);
}
const errors: [string, BaseError][] = [];
const transformed = new Map<K, V>();
for (const [key, val] of value.entries()) {
const keyResult = this.keyValidator.run(key);
const valueResult = this.valueValidator.run(val);
const { length } = errors;
if (keyResult.isErr()) errors.push([key, keyResult.error]);
if (valueResult.isErr()) errors.push([key, valueResult.error]);
if (errors.length === length) transformed.set(keyResult.value!, valueResult.value!);
}
return errors.length === 0 //
? Result.ok(transformed)
: Result.err(new CombinedPropertyError(errors));
}
}