const UTC_LONG = new Intl.DateTimeFormat("en-US", { dateStyle: "long", timeZone: "UTC"});

export default function (eleventyConfig) {
    eleventyConfig.addPassthroughCopy({ "src/assets": "assets"});
    eleventyConfig.addPassthroughCopy({ "src/public": "/" });

    eleventyConfig.addPreprocessor("drafts", "*", (data) => {
        if (data.draft) return false;
    });

    eleventyConfig.addFilter("readableDate", (date) => UTC_LONG.format(date));
    eleventyConfig.addFilter("isoDate", (date) => date.toISOString().slice(0, 10));

    return {
        dir: { input: "src" },
        templateFormats: ["md", "njk", "html"],
        markdownTemplateEngine: "njk",
        htmlTemplateEngine: "njk"
    };
}