create SyncDish and wrap results in it.
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d98762625
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d00b9e0928
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45d2fbc5fc
@ -393,7 +393,7 @@ module.exports = function (grunt) {
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"mkdir -p src/core/config/modules",
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"echo 'export default {};\n' > src/core/config/modules/OpModules.mjs",
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"echo '[]\n' > src/core/config/OperationConfig.json",
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"node --experimental-modules src/core/config/scripts/generateNodeIndex.mjs",
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"node --experimental-modules src/node/config/scripts/generateNodeIndex.mjs",
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"echo '--- Node index finished. ---\n'"
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].join(";"),
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},
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@ -1,12 +1,12 @@
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/**
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* Wrap operations for consumption in Node
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* Wrap operations for consumption in Node.
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*
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* @author d98762625 [d98762625@gmail.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 Dish from "../core/Dish";
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import SyncDish from "./SyncDish";
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/**
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* Extract default arg value from operation argument
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@ -59,61 +59,36 @@ function transformArgs(originalArgs, newArgs) {
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* @returns {Function} The operation's run function, wrapped in
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* some type conversion logic
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*/
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export function wrap(Operation) {
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export function wrap(opClass) {
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/**
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* Wrapped operation run function
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* @param {*} input
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* @param {Object[]} args
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* @returns {SyncDish} operation's output, on a Dish.
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* @throws {OperationError} if the operation throws one.
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*/
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return async (input, args=null, callback) => {
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return (input, args=null) => {
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const operation = new opClass();
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if (callback && typeof callback !== "function") {
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throw TypeError("Expected callback to be a function");
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let dish;
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if (input instanceof SyncDish) {
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dish = input;
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} else {
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dish = new SyncDish();
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const type = SyncDish.typeEnum(input.constructor.name);
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dish.set(input, type);
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}
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if (!callback && typeof args === "function") {
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callback = args;
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args = null;
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}
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const operation = new Operation();
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const dish = new Dish();
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const type = Dish.typeEnum(input.constructor.name);
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dish.set(input, type);
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args = transformArgs(operation.args, args);
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const transformedInput = await dish.get(operation.inputType);
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// Allow callback or promsise / async-await
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if (callback) {
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try {
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const out = operation.run(transformedInput, args);
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callback(null, out);
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} catch (e) {
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callback(e);
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}
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} else {
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return operation.run(transformedInput, args);
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}
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const transformedInput = dish.get(operation.inputType);
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const result = operation.run(transformedInput, args);
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return new SyncDish({
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value: result,
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type: operation.outputType
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});
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};
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}
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/**
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* First draft
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* @namespace Api
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* @param input
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* @param type
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*/
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export async function translateTo(input, type) {
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const dish = new Dish();
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const initialType = Dish.typeEnum(input.constructor.name);
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dish.set(input, initialType);
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return await dish.get(type);
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}
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/**
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* Extract properties from an operation by instantiating it and
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* returning some of its properties for reference.
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@ -13,8 +13,8 @@
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import fs from "fs";
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import path from "path";
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import * as operations from "../../operations/index";
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import { decapitalise } from "../../../node/apiUtils";
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import * as operations from "../../../core/operations/index";
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import { decapitalise } from "../../apiUtils";
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const dir = path.join(`${process.cwd()}/src/node`);
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if (!fs.existsSync(dir)) {
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@ -36,7 +36,7 @@ let code = `/**
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import "babel-polyfill";
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import { wrap, translateTo } from "./apiUtils";
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import { wrap } from "./apiUtils";
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import {
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`;
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@ -76,7 +76,6 @@ code += ` };
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}
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const chef = generateChef();
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chef.translateTo = translateTo;
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`;
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Object.keys(operations).forEach((op) => {
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151
src/node/syncDish.mjs
Normal file
151
src/node/syncDish.mjs
Normal file
@ -0,0 +1,151 @@
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/**
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* @author d98762625 [d98762625@gmail.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 Utils from "../core/Utils";
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import Dish from "../core/Dish";
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import BigNumber from "bignumber.js";
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import log from "loglevel";
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/**
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* Subclass of Dish where `get` and `_translate` are synchronous.
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* Also define functions to improve coercion behaviour.
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*/
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class SyncDish extends Dish {
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/**
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* Synchronously returns the value of the data in the type format specified.
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*
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* @param {number} type - The data type of value, see Dish enums.
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* @param {boolean} [notUTF8=false] - Do not treat strings as UTF8.
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* @returns {*} - The value of the output data.
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*/
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get(type, notUTF8=false) {
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if (typeof type === "string") {
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type = Dish.typeEnum(type);
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}
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if (this.type !== type) {
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this._translate(type, notUTF8);
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}
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return this.value;
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}
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/**
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* alias for get
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* @param args see get args
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*/
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to(...args) {
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return this.get(...args);
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}
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/**
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* Avoid coercion to a String primitive.
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*/
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toString() {
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return this.get(Dish.typeEnum("string"));
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}
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/**
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* Log only the value to the console in node.
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*/
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inspect() {
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return this.get(Dish.typeEnum("string"));
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}
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/**
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* Avoid coercion to a Number primitive.
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*/
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valueOf() {
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return this.get(Dish.typeEnum("number"));
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}
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/**
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* Synchronously translates the data to the given type format.
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*
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* @param {number} toType - The data type of value, see Dish enums.
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* @param {boolean} [notUTF8=false] - Do not treat strings as UTF8.
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*/
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_translate(toType, notUTF8=false) {
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log.debug(`Translating Dish from ${Dish.enumLookup(this.type)} to ${Dish.enumLookup(toType)}`);
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const byteArrayToStr = notUTF8 ? Utils.byteArrayToChars : Utils.byteArrayToUtf8;
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// Convert data to intermediate byteArray type
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switch (this.type) {
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case Dish.STRING:
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this.value = this.value ? Utils.strToByteArray(this.value) : [];
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break;
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case Dish.NUMBER:
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this.value = typeof this.value === "number" ? Utils.strToByteArray(this.value.toString()) : [];
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break;
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case Dish.HTML:
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this.value = this.value ? Utils.strToByteArray(Utils.unescapeHtml(Utils.stripHtmlTags(this.value, true))) : [];
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break;
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case Dish.ARRAY_BUFFER:
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// Array.from() would be nicer here, but it's slightly slower
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this.value = Array.prototype.slice.call(new Uint8Array(this.value));
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break;
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case Dish.BIG_NUMBER:
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this.value = this.value instanceof BigNumber ? Utils.strToByteArray(this.value.toFixed()) : [];
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break;
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case Dish.JSON:
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this.value = this.value ? Utils.strToByteArray(JSON.stringify(this.value)) : [];
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break;
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// case Dish.FILE:
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// this.value = Utils.readFileSync(this.value);
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// this.value = Array.prototype.slice.call(this.value);
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// break;
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// case Dish.LIST_FILE:
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// this.value = this.value.map(f => Utils.readFileSync(f));
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// this.value = this.value.map(b => Array.prototype.slice.call(b));
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// this.value = [].concat.apply([], this.value);
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// break;
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default:
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break;
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}
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this.type = Dish.BYTE_ARRAY;
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// Convert from byteArray to toType
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switch (toType) {
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case Dish.STRING:
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case Dish.HTML:
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this.value = this.value ? byteArrayToStr(this.value) : "";
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this.type = Dish.STRING;
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break;
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case Dish.NUMBER:
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this.value = this.value ? parseFloat(byteArrayToStr(this.value)) : 0;
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this.type = Dish.NUMBER;
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break;
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case Dish.ARRAY_BUFFER:
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this.value = new Uint8Array(this.value).buffer;
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this.type = Dish.ARRAY_BUFFER;
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break;
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case Dish.BIG_NUMBER:
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try {
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this.value = new BigNumber(byteArrayToStr(this.value));
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} catch (err) {
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this.value = new BigNumber(NaN);
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}
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this.type = Dish.BIG_NUMBER;
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break;
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case Dish.JSON:
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this.value = JSON.parse(byteArrayToStr(this.value));
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this.type = Dish.JSON;
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break;
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// case Dish.FILE:
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// this.value = new File(this.value, "unknown");
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// break;
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// case Dish.LIST_FILE:
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// this.value = [new File(this.value, "unknown")];
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// this.type = Dish.LIST_FILE;
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// break;
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default:
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break;
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}
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}
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}
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export default SyncDish;
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