nestjs-custom-class-validators/lib/transformers/validatorTransformers.js

This package contains a few custom validator I have found to be repetitive, So I made templates that handles both class-validator checks and Swagger configuration

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.TransformDateStringToDateObject = exports.TransformSingleItemToArray = exports.TransformSortStringArray = exports.TransformStringToJSONArray = exports.SortStringArrayAlphabetically = exports.TransformNumberStringToNumber = exports.TransformBooleanStringToBoolean = void 0;
const common_1 = require("@nestjs/common");
const TransformBooleanStringToBoolean = ({ value }) => {
    if (typeof value === "boolean") {
        return value;
    }
    if (value && typeof value == "string") {
        if (value.trim().toLocaleLowerCase() === "true") {
            return true;
        }
        else if (value.trim().toLocaleLowerCase() === "false") {
            return false;
        }
    }
    return "";
};
exports.TransformBooleanStringToBoolean = TransformBooleanStringToBoolean;
const TransformNumberStringToNumber = ({ value }) => {
    if (Array.isArray(value)) {
        return value.map((_value) => typeof _value == "string" ? Number(_value) : _value);
    }
    else if (!Array.isArray(value) && typeof value === "string") {
        return Number(value);
    }
    return value;
};
exports.TransformNumberStringToNumber = TransformNumberStringToNumber;
const SortStringArrayAlphabetically = ({ value }) => {
    return value && Array.isArray(value)
        ? value.sort((a, b) => a.localeCompare(b))
        : value;
};
exports.SortStringArrayAlphabetically = SortStringArrayAlphabetically;
const TransformStringToJSONArray = ({ value, key }) => {
    if (!value) {
        throw new common_1.UnprocessableEntityException(`${key}: Must not be empty`);
    }
    try {
        if (Array.isArray(value)) {
            return value;
        }
        if (typeof value === "string") {
            const splitAsString = value.split(",");
            const isJSONArrayString = value.constructor === [].constructor;
            if (Array.isArray(splitAsString) &&
                splitAsString.length > 0 &&
                !isJSONArrayString) {
                return splitAsString;
            }
            if (isJSONArrayString) {
                return JSON.parse(value);
            }
        }
        throw new Error("validation failed");
    }
    catch (err) {
        throw new common_1.UnprocessableEntityException(`${key}: Must be an array, JSON array or comma separated string`);
    }
};
exports.TransformStringToJSONArray = TransformStringToJSONArray;
const TransformSortStringArray = ({ value }) => {
    return Array.isArray(value) && value.length
        ? value.sort((a, b) => a.localeCompare(b))
        : value;
};
exports.TransformSortStringArray = TransformSortStringArray;
const TransformSingleItemToArray = ({ value }) => {
    return Array.isArray(value) ? value : [value];
};
exports.TransformSingleItemToArray = TransformSingleItemToArray;
const TransformDateStringToDateObject = ({ value }) => {
    const date = new Date(value);
    if (typeof value === "string" && date) {
        return date;
    }
    return value;
};
exports.TransformDateStringToDateObject = TransformDateStringToDateObject;
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