@loom-io/front-matter-converter/dist/core/unify.js

Convert front matter yaml and json into json from loom-io files

import * as YAML from "yaml";
import { getFrontMatterConverter, hasFrontMatter, } from "./utils.js";
export async function writeToFile(file, matter = "", content = "") {
    const emptyLineBeforeContent = content.length === 0 ? "" : "\n";
    await file.write(`---\n${ensureNewLine(matter)}---\n${emptyLineBeforeContent}${content}`);
}
export async function stringifyJson(file, data) {
    if (data == null) {
        return "";
    }
    const reader = await file.reader();
    const lineReader = await reader.firstLine();
    if (lineReader && (await hasFrontMatter(lineReader))) {
        const converter = await getFrontMatterConverter(lineReader);
        return converter.stringify(data);
    }
    else {
        return YAML.stringify(data);
    }
}
export function ensureNewLine(content) {
    if (content && content.length > 0 && content[content.length - 1] !== "\n") {
        return `${content}\n`;
    }
    return content;
}
export async function unify(file, content = null) {
    if (content == null) {
        await writeToFile(file);
        return;
    }
    else if (typeof content === "string") {
        await writeToFile(file, undefined, content);
        return;
    }
    else if (typeof content === "object") {
        if ((Object.keys(content).length === 1 &&
            ("data" in content || "content" in content)) ||
            (Object.keys(content).length === 2 &&
                "data" in content &&
                "content" in content)) {
            const dataString = "data" in content ? await stringifyJson(file, content.data) : "";
            const contentString = "content" in content ? String(content.content) : "";
            await writeToFile(file, dataString, contentString);
        }
        else {
            const dataString = await stringifyJson(file, content);
            await writeToFile(file, dataString);
        }
    }
}