@emanuelsan/mosaic-js/dist/utils/getTemplateContent.js

Composable Markdown-based AI instruction engine for Node.js

import path from "path";
import fs from "fs";
import { Effect, Console } from "effect";
import { findMarkdownFileById } from "./findMarkdownFileById";
import { Directory } from "./normalizeToRelativeSelector";
// TODO: Write documentation for this function
// This function should respect the principle of graceful degradation
// If a template is not found, it should return null instead of throwing an error
// At the same time, it should log a warning to the console
export const getTemplateContent = ({ templateSelector, type, }) => Effect.gen(function* () {
    const directory = yield* Directory;
    const instructionsDir = yield* directory.templateDir;
    // Retrieve content for type id
    if (type === "id") {
        const id = templateSelector.slice(1); // remove '#'
        const foundPath = findMarkdownFileById(instructionsDir, id);
        if (!foundPath) {
            yield* Console.warn(`"${templateSelector}" does not exist. Returning null...`);
            return null;
        }
        const templateContent = fs.readFileSync(foundPath, "utf-8");
        return templateContent;
    }
    // Retrieve content for type root
    let selectorPath = templateSelector;
    if (type === "root") {
        selectorPath = templateSelector.slice(1);
    }
    // Retrieve content for type relative
    const templatePath = path.join(instructionsDir, selectorPath + ".md");
    if (!fs.existsSync(templatePath)) {
        yield* Console.warn(`"${templateSelector}" does not exist. Returning null...`);
        return null;
    }
    return fs.readFileSync(templatePath, "utf-8");
});
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