@adocasts.com/dto/build/services/file_service.js

Easily make and generate DTOs from Lucid Models

import { access, constants, readFile } from 'node:fs/promises';
import string from '@adonisjs/core/helpers/string';
export default class FileService {
    /**
     * Determines whether the provided file path exists and has allow-read permissions
     * @param filePath
     */
    static async canRead(filePath) {
        try {
            await access(filePath, constants.R_OK);
            return true;
        }
        catch {
            return false;
        }
    }
    /**
     * Get's a files property declarations lines (declare | public)
     * @param filePath
     */
    static async readDeclarations(filePath) {
        const contents = await readFile(filePath, 'utf8');
        const fileLines = contents.split('\n');
        const classStartIndex = fileLines.findIndex((line) => line.includes('export default class '));
        const classEndIndex = fileLines.findLastIndex((line) => string.condenseWhitespace(line) === '}');
        const classLines = fileLines
            .slice(classStartIndex + 1, classEndIndex)
            .map((line) => string.condenseWhitespace(line));
        let isInBlock = false;
        const definitions = classLines.filter((line) => {
            const propertyMatch = line.match(/^(declare |public |get |[0-9A-z])+/);
            const isStatic = line.startsWith('static ');
            const isDefinition = propertyMatch && !isStatic && !isInBlock;
            if (line.endsWith('{'))
                isInBlock = true;
            if (line.startsWith('}') && isInBlock)
                isInBlock = false;
            return isDefinition;
        });
        return { definitions, fileLines };
    }
}