A script for a Tauri application to iterate over files and generate new file names and not overwrite old ones

tauri-file-diff.js

const { BaseDirectory, exists } = window.__TAURI__.fs;

async function doesFileExist(fileName) {
	let fileExists = await exists(fileName + ".pdf", {
		baseDir: BaseDirectory.Download,
	});

	let fileCounter = 0;
	while (fileExists) {
		fileCounter++;
		fileExists = await exists(fileName + `-${fileCounter}.pdf`, {
			baseDir: BaseDirectory.Download,
		});
	}

	return fileCounter > 0 ? fileName + `-${fileCounter}` : fileName;
}