text-stream-search/dist/text-stream-search.js

Searches for occurrences of a given search term in Node.js text streams

import { SearchList } from "./search-list.js";
import { RegexSearch } from "./searches/regex-search.js";
import { StringSearch } from "./searches/string-search.js";
import { TextAccumulator } from "./text-accumulator.js";
/**
 * TextStreamSearch searches ReadableStreams for text and regexes.
 */
export default class TextStreamSearch {
    constructor(stream) {
        this.streamText = new TextAccumulator();
        this.searchList = new SearchList();
        stream.on("data", this.onStreamData.bind(this));
    }
    /** Fulltext returns the complete content captured from this stream so far. */
    fullText() {
        return this.streamText.toString();
    }
    /**
     * WaitForRegex returns a promise that resolves with the matching text
     * when the given RegExp shows up in observed stream.
     * If a timeout is given, aborts after the given duration.
     */
    waitForRegex(regex, timeout) {
        return new Promise((resolve, reject) => {
            this.searchList.push(new RegexSearch(regex, resolve, reject, this.streamText, timeout));
            this.searchList.scan();
        });
    }
    /**
     * WaitForText returns a promise that resolves with the matching text
     * when the given text shows up in the observed stream.
     * If a timeout is given, aborts after the given duration.
     */
    waitForText(text, timeout) {
        return new Promise((resolve, reject) => {
            this.searchList.push(new StringSearch(text, resolve, reject, this.streamText, timeout));
            this.searchList.scan();
        });
    }
    /** OnStreamData is called when new text arrives on the input stream. */
    onStreamData(data) {
        this.streamText.push(data.toString());
        this.searchList.scan();
    }
}
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