import * as fs from "fs";
import * as path from "path";

import * as mime from "mime-types";
import * as bodyParser from "body-parser";

export function isSQLite(sequelize) {
  return sequelize.options.dialect === 'sqlite'
}

export function getImageMimeType(imagePath) {
  return mime.lookup(path.extname(imagePath))
}

export function isRevealTheme(theme) {
  if (fs.existsSync(path.join(__dirname, '..', 'public', 'build', 'reveal.js', 'css', 'theme', theme + '.css'))) {
    return theme
  }
  return undefined
}

export function wrap(innerHandler) {
  return (req, res, next) => innerHandler(req, res).catch(err => next(err))
}

// create application/x-www-form-urlencoded parser
export const urlencodedParser = bodyParser.urlencoded({
  extended: false,
  limit: 1024 * 1024 * 10 // 10 mb
})

// create text/markdown parser
export const markdownParser = bodyParser.text({
  inflate: true,
  type: ['text/plain', 'text/markdown'],
  limit: 1024 * 1024 * 10 // 10 mb
})