bookbrainz/bookbrainz-site

/*
 * Copyright (C) 2017  Ben Ockmore
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

import {DateObject, ISODateStringToObject, isNullDate} from '../../helpers/utils';
import _ from 'lodash';
import {dateValidator} from './date';
import {isIterable} from '../../../types';
import validator from 'validator';


export function get(
    object: any,
    path: string,
    defaultValue: unknown | null | undefined = null
): any {
    if (isIterable(object)) {
        return object.get(path, defaultValue);
    }
    return _.get(object, path, defaultValue);
}

export function getIn(
    object: any,
    paths: string[],
    defaultValue: unknown | null | undefined = null
): any {
    if (isIterable(object)) {
        return object.getIn(paths, defaultValue);
    }
    return _.get(object, paths, defaultValue);
}

export function absentAndRequired(value: any, required: boolean | null | undefined): boolean {
    return Boolean(required && _.isNil(value));
}

export function nilOrString(value: any): boolean {
    return _.isNil(value) || _.isString(value);
}

export function nilOrInteger(value: any): boolean {
    return _.isNil(value) || _.isInteger(value);
}

export function validateOptionalString(value: any): boolean {
    return nilOrString(value);
}

export function validateRequiredString(value: any): boolean {
    if (!_.isString(value)) {
        return false;
    }

    return Boolean(value);
}

export function validatePositiveInteger(
    value: any, required = false
): boolean {
    if (absentAndRequired(value, required)) {
        return false;
    }

    if (!nilOrInteger(value)) {
        return false;
    }

    return _.isNil(value) || (_.isInteger(value) && value > 0);
}

export function validateDate(value: string | DateObject) {
    let dateObject;
    // We expect a string but accept both ISO date strings and {year,month,date} objects
    if (_.isString(value)) {
        dateObject = ISODateStringToObject(value);
    }
    else {
        dateObject = value;
    }
    const year = _.get(dateObject, 'year', null);
    const month = _.get(dateObject, 'month', null);
    const day = _.get(dateObject, 'day', null);
    const {isValid, errorMessage} = dateValidator(day, month, year);
    return {errorMessage, isValid};
}


export function dateIsBefore(beginValue: string | DateObject, endValue: string | DateObject): boolean {
    const beginDateObject = ISODateStringToObject(beginValue);
    const endDateObject = ISODateStringToObject(endValue);
    if (isNullDate(beginDateObject) || isNullDate(endDateObject) || !validateDate(beginDateObject).isValid ||
        !validateDate(endDateObject).isValid) {
        return true;
    }

    const beginYear = _.toInteger(beginDateObject.year);
    const beginMonth = _.toInteger(beginDateObject.month);
    const beginDay = _.toInteger(beginDateObject.day);

    const endYear = _.toInteger(endDateObject.year);
    const endMonth = _.toInteger(endDateObject.month);
    const endDay = _.toInteger(endDateObject.day);

    if (beginYear < endYear) {
        return true;
    }
    else if (beginYear > endYear) {
        return false;
    }
    else if (beginMonth > endMonth) {
        return false;
    }
    else if (beginMonth < endMonth) {
        return true;
    }
    else if (beginDay > endDay) {
        return false;
    }
    else if (beginDay < endDay) {
        return true;
    }

    return false;
}

export function validateUUID(
    value: unknown, required = false
): boolean {
    if (absentAndRequired(value, required)) {
        return false;
    }

    if (!nilOrString(value)) {
        return false;
    }

    return !value || validator.isUUID(value);
}