backbone-model-shape-proptypes.js

/**
 * Backbone.Model shape propType checker for the `prop-types` package.
 */

import PropTypesSecret from 'prop-types/lib/ReactPropTypesSecret';

function createChainableTypeChecker(validate) {
    function checkType(isRequired, props, propName, componentName, location, propFullName) {
        var value = props[propName];
        propFullName = propFullName || propName;

        if (value === null || value === undefined) {
            return isRequired
                ? new Error(
                      'Required ' +
                          location +
                          ' `' +
                          propFullName +
                          '` was not specified in ' +
                          '`' +
                          componentName +
                          '`.'
                  )
                : null;
        }

        return validate(
            props,
            propFullName,
            componentName,
            location,
            propFullName,
            PropTypesSecret
        );
    }

    var PropType = checkType.bind(null, false);
    PropType.isRequired = checkType.bind(null, true);

    return PropType;
}

function getType(x) {
    return Array.isArray(x) ? 'array' : typeof x;
}

export function modelShape(shapeTypes) {
    return createChainableTypeChecker(function(props, propName, componentName, location) {
        var value = props[propName];
        var propType = getType(value);

        if (propType !== 'object' || !value.attributes) {
            return new Error(
                'Invalid ' +
                    location +
                    ' `' +
                    propName +
                    '` of type `' +
                    propType +
                    '` ' +
                    'supplied to `' +
                    componentName +
                    '`, expected `Backbone.Model`.'
            );
        }

        for (var key in shapeTypes) {
            var checker = shapeTypes[key];
            if (!checker) continue;

            var error = checker(
                value.attributes,
                key,
                componentName,
                location,
                propName + ".get('" + key + "')",
                PropTypesSecret
            );
            if (error) return error;
        }

        return null;
    });
}