eduterra-cli/lib/utils.js

EduTerra API client

'use strict';

var crypto = require('crypto')
  , fs = require('fs')
  , path = require('path')
  , _ = require('underscore')
  , mkdirp = require('mkdirp')
  , async = require('async');

exports.sha256 = function (str) {
  var p = crypto.createHash('sha256');
  p.update(str, 'utf-8');
  return p.digest('hex');
};

exports.randomString = function (length) {
  var CHARS = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890_';
  var result = '';
  for (var i = 0; i < length; i++)
    result += CHARS[Math.floor(Math.random() * CHARS.length)];
  return result;
};

exports.ls = function ls(root, cb) {
  var tree = {name: '/', relPath: '', files: []};
  _ls('', tree, function (err) {
    if (err) return cb(err);
    return cb(null, tree);
  });
  function _ls(dir, subtree, cb) {
    fs.readdir(path.join(root, dir), function (err, files) {
      if (err) return cb(err);
      async.each(files, function (file, cb) {
        fs.stat(path.join(root, dir, file), function (err, stat) {
          if (err) return cb(err);
          var relPath = path.join(dir, file);
          if (stat.isDirectory()) {
            var _tree = {name: file, relPath: relPath, files: []};
            subtree.files.push(_tree);
            _ls(path.join(dir, file), _tree, cb);
          } else {
            subtree.files.push({
              name: file,
              relPath: relPath,
              ext: path.extname(relPath).replace(/^\./g, ''),
              mtime: stat.mtime.getTime()
            });
            cb(null);
          }
        });
      }, cb);
    });
  }
};

exports.copy = function (src, dst, data, cb) {
  fs.stat(src, function (err, stat) {
    if (err) return cb(err);
    if (stat.isDirectory()) {
      return mkdirp(dst, function (err) {
        if (err) return cb(err);
        fs.readdir(src, function (err, files) {
          if (err) return cb(err);
          async.each(files, function (file, cb) {
            exports.copy(path.join(src, file), path.join(dst, file), data, cb);
          }, cb);
        });
      });
    } else if (stat.isFile()) {
      exports.compileFile(src, dst, data, cb);
    }
  });
};

exports.compileFile = function (src, dst, data, cb) {
  fs.readFile(src, 'utf-8', function (err, text) {
    if (err) return cb(err);
    var compiled = _.template(text)(data);
    fs.writeFile(dst, compiled, 'utf-8', cb);
  });
};