'use strict';

const remove = require('fs-extra').remove
	, uploadDirectory = require(__dirname+'/../../helpers/uploadDirectory.js')

module.exports = async (posts, unlinkOnly) => {

	//get filenames from all the posts
	let fileNames = [];
	posts.forEach(post => {
		fileNames = fileNames.concat(post.files.map(x => x.filename))
	})

	if (fileNames.length === 0) {
		return {
			message: 'No files found'
		}
	}

	if (unlinkOnly) {
		return {
			message:`Unlinked ${fileNames.length} file(s) across ${posts.length} post(s)`,
			action:'$set',
			query: {
				'files': []
			}
		};
	} else {
		//delete all the files using the filenames
		await Promise.all(fileNames.map(async filename => {
			//dont question it.
			return Promise.all([
				remove(`${uploadDirectory}img/${filename}`),
				remove(`${uploadDirectory}img/thumb-${filename.split('.')[0]}.jpg`)
			])
		}));
		return {
			message:`Deleted ${fileNames.length} file(s) from server`,
		};
	}


}