saxi/dist/server/regex-transform-stream.js

Drive the AxiDraw pen plotter

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RegexParser = void 0;
require("web-streams-polyfill/polyfill");
class RegexParser extends TransformStream {
    constructor(opts) {
        if (opts.regex === undefined) {
            throw new TypeError('"options.regex" must be a regular expression pattern or object');
        }
        if (!(opts.regex instanceof RegExp)) {
            opts.regex = new RegExp(opts.regex);
        }
        const regex = opts.regex;
        let data = '';
        const decoder = new TextDecoder();
        super({
            transform(chunk, controller) {
                const newData = data + decoder.decode(chunk);
                const parts = newData.split(regex);
                data = parts.pop();
                parts.forEach(part => {
                    controller.enqueue(part);
                });
            },
            flush(controller) {
                controller.enqueue(data);
                data = '';
            }
        });
    }
}
exports.RegexParser = RegexParser;
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