@vaadin/hilla-models/ConstraintBuilder.js

Generative form models for Hilla

import { $assertSupportedModel, $defaultValue, $name, Model, } from './Model.js';
export class ConstraintBuilder {
    #supportedModel;
    [$name];
    #attributeDefaults;
    constructor() {
        this.#supportedModel = Model;
        this.#attributeDefaults = {};
    }
    model(supportedModel) {
        this.#supportedModel = supportedModel;
        return this;
    }
    name(name) {
        this[$name] = name;
        return this;
    }
    attribute(name, model) {
        this.#attributeDefaults[name] = model[$defaultValue];
        return this;
    }
    build() {
        const name = this[$name];
        const attributeDefaults = this.#attributeDefaults;
        const supportedModel = this.#supportedModel;
        function assertSupportedModel(model) {
            if (!(model instanceof supportedModel)) {
                throw new Error(`The constraint "${name}" is not applicable to the model "${model[$name]}".`);
            }
        }
        let NonAttributedConstraint = ((valueOrAttributes) => {
            const attributes = {
                ...attributeDefaults,
                ...(typeof valueOrAttributes === 'object' && valueOrAttributes !== null
                    ? valueOrAttributes
                    : { value: valueOrAttributes }),
            };
            return Object.defineProperties(Object.create(NonAttributedConstraint), {
                attributes: { value: attributes },
            });
        });
        NonAttributedConstraint = Object.defineProperties(NonAttributedConstraint, {
            name: { value: name },
            [$assertSupportedModel]: { value: assertSupportedModel },
        });
        return NonAttributedConstraint;
    }
}
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