mirror of
https://github.com/scratchfoundation/scratch-storage.git
synced 2025-06-09 11:52:09 -04:00
3d0b429526
Breaking flag is because it may have some differences in the way the library is exported - `module.exports = ` vs `module.exports.default = `. That would depend on the Webpack config, so it should continue working, but just to be safe.
105 lines
2.7 KiB
TypeScript
105 lines
2.7 KiB
TypeScript
import FetchWorkerTool from './FetchWorkerTool';
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import {FetchTool} from './FetchTool';
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/**
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* @typedef {object} Request
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* @property {string} url
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* @property {*} body
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* @property {string} method
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* @property {boolean} withCredentials
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*/
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/**
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* Get and send assets with other tools in sequence.
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*/
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export default class ProxyTool {
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// TODO: Typing
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public tools: any[];
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/**
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* Constant values that filter the set of tools in a ProxyTool instance.
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* @enum {string}
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*/
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public static TOOL_FILTER = {
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/**
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* Use all tools.
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*/
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ALL: 'all',
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/**
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* Use tools that are ready right now.
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*/
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READY: 'ready'
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};
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constructor (filter = ProxyTool.TOOL_FILTER.ALL) {
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let tools;
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if (filter === ProxyTool.TOOL_FILTER.READY) {
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tools = [new FetchTool()];
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} else {
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tools = [new FetchWorkerTool(), new FetchTool()];
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}
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/**
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* Sequence of tools to proxy.
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* @type {Array.<Tool>}
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*/
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this.tools = tools;
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}
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/**
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* Is get supported? false if all proxied tool return false.
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* @returns {boolean} Is get supported?
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*/
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get isGetSupported () {
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return this.tools.some(tool => tool.isGetSupported);
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}
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/**
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* Request data from with one of the proxied tools.
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* @param {Request} reqConfig - Request configuration for data to get.
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* @returns {Promise.<Buffer>} Resolve to Buffer of data from server.
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*/
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get (reqConfig) {
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let toolIndex = 0;
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const nextTool = (err?) => {
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const tool = this.tools[toolIndex++];
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if (!tool) {
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throw err;
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}
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if (!tool.isGetSupported) {
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return nextTool(err);
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}
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return tool.get(reqConfig).catch(nextTool);
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};
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return nextTool();
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}
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/**
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* Is sending supported? false if all proxied tool return false.
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* @returns {boolean} Is sending supported?
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*/
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get isSendSupported () {
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return this.tools.some(tool => tool.isSendSupported);
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}
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/**
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* Send data to a server with one of the proxied tools.
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* @param {Request} reqConfig - Request configuration for data to send.
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* @returns {Promise.<Buffer|string|object>} Server returned metadata.
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*/
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send (reqConfig) {
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let toolIndex = 0;
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const nextTool = (err?) => {
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const tool = this.tools[toolIndex++];
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if (!tool) {
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throw err;
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}
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if (!tool.isSendSupported) {
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return nextTool(err);
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}
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return tool.send(reqConfig).catch(nextTool);
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};
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return nextTool();
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}
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}
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