parse-engine-registry.ts

import ParseEngine from './common/parse-engine';
import CssParseEngine from './types/css-parse-engine';
import HtmlParseEngine from './types/html-parse-engine';
import JsParseEngine from './types/js-parse-engine';

class ParseEngineRegistry {
    private static _supportedLanguagesIds: string[];
    private static _registry: ParseEngine[] = [
        new CssParseEngine(),
        new HtmlParseEngine(),
        new JsParseEngine()
    ];

    public static get supportedLanguagesIds(): string[] {
        if (!ParseEngineRegistry._supportedLanguagesIds) {
            ParseEngineRegistry._supportedLanguagesIds = ParseEngineRegistry._registry.map(parseEngine => parseEngine.languageId);
        }

        return ParseEngineRegistry._supportedLanguagesIds;
    }

    public static getParseEngine(languageId: string): ParseEngine {
        let foundParseEngine = ParseEngineRegistry._registry.find(value => value.languageId === languageId);

        if (!foundParseEngine) {
            throw `Could not find a parse engine for the provided language id ("${languageId}").`;
        }

        return foundParseEngine;
    }
}

export default ParseEngineRegistry;