@codesnippets/codesnippets/src/snippet.ts

Open source code snippets and examples.

import crypto = require('crypto');
import fs = require('fs');
import path = require('path');
import { Language } from './language';
const syncRequest = require('sync-request');

export class Snippet {
	public constructor(public readonly name: string, private language: Language, private object: any) {}

	private doRequest(): string {
		let res = syncRequest('GET', this.object.url);
		return res.body;
	}

	private initDir() {
		if (!fs.existsSync(path.resolve(path.join(__dirname, '../', this.language.name)))) {
			fs.mkdirSync(path.resolve(path.join(__dirname, '../', this.language.name.toLowerCase())));
		}
	}

	private getFile() {
		this.initDir();
		let data = this.doRequest().toString();
		fs.writeFileSync(path.resolve(path.join(__dirname, '../', this.object.path)), data);
		return data;
	}

	/**
	 * Gets the file contents of the snippet.
	 * @param callback called when the snippet is retrieved
	 */
	public get(): string {
		if (!fs.existsSync(this.object.path)) {
			return this.getFile();
		} else {
			let data = fs.readFileSync(this.object.path).toString();

			let hash = crypto.createHash('sha1');
			hash.update(data);

			if (hash.digest('hex') !== this.object.sum) {
				return this.getFile();
			} else {
				return data;
			}
		}
	}
}