102 lines
2.8 KiB
JavaScript
102 lines
2.8 KiB
JavaScript
/**
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* @author klaxon [klaxon@veyr.com]
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* @copyright Crown Copyright 2018
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* @license Apache-2.0
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*/
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import Operation from "../Operation.mjs";
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import OperationError from "../errors/OperationError.mjs";
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import { GenerateParagraphs, GenerateSentences, GenerateWords, GenerateBytes } from "../lib/LoremIpsum.mjs";
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// arbitrary limits set to avoid DoS by requesting ridiculous amounts of data
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const maxLoremWords = 100_000; // same limit also used for paragraphs/sentences
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const maxLoremCharacters = 1_000_000;
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/**
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* Generate Lorem Ipsum operation
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*/
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class GenerateLoremIpsum extends Operation {
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/**
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* GenerateLoremIpsum constructor
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*/
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constructor() {
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super();
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this.name = "Generate Lorem Ipsum";
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this.module = "Default";
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this.description = "Generate varying length lorem ipsum placeholder text.";
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this.infoURL = "https://wikipedia.org/wiki/Lorem_ipsum";
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this.inputType = "string";
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this.outputType = "string";
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this.args = [
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{
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"name": "Length",
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"type": "number",
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"value": "3"
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},
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{
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"name": "Length in",
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"type": "option",
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"value": ["Paragraphs", "Sentences", "Words", "Bytes"]
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}
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];
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}
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/**
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run(input, args) {
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const [length, lengthType] = args;
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checkLimits(lengthType, length);
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switch (lengthType) {
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case "Paragraphs":
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return GenerateParagraphs(length);
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case "Sentences":
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return GenerateSentences(length);
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case "Words":
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return GenerateWords(length);
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case "Bytes":
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return GenerateBytes(length);
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default:
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throw new OperationError("Invalid length type");
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}
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}
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}
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export default GenerateLoremIpsum;
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/**
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* check combined validity of lengthType and length arguments
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* @param {string} lengthType
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* @param {number} length
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* @throws {OperationError}
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*/
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function checkLimits(lengthType, length) {
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if (length < 1) {
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throw new OperationError("Length must be greater than 0");
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}
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switch (lengthType) {
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case "Paragraphs":
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case "Sentences":
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case "Words":
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if (length > maxLoremWords) {
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throw new OperationError("Length must be less than " + maxLoremWords);
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}
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break;
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case "Bytes":
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if (length > maxLoremCharacters) {
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throw new OperationError("Length must be less than " + maxLoremCharacters);
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}
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break;
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default:
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throw new OperationError("Invalid length type");
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}
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}
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