const showdown = require('showdown')
const express = require('express')
const fs = require('fs')

const converter = new showdown.Converter({tables: true})

function compileFile(file, fn){
  fs.readFile(file, 'utf-8', function(err, markdown){
    if(err){
      console.error("ERROR: could not read file:", file)
      if(typeof fn == 'function')
        fn(-1)
    }
    html = converter.makeHtml(markdown);
    if(typeof fn == 'function')
      fn(html)
    else
      fs.writeFile(fn, html, function(err){
        if(err)
          console.error(err)
      })
  })
}

function compileDir(source, target){
  fs.readdir(source, function(err, files){
    for(f in files){
      if(files[f].substr(-3) != '.md'){
        continue
      }
      t = target + '/' + files[f].substr(0, files[f].length-2) + 'html'
      compileFile(source + '/' + files[f], t)
    }
  })
}

compileDir('markdown', "html")

const app = express()
app.set('view engine', 'ejs');
app.set('views', __dirname + '/html')

app.get('/logboek/:lab', function(req, res, next){
  res.render('logboek', { lab: req.params.lab})
})

app.use('/img', function(req, res, next){
  res.sendFile(__dirname + '/img' + req.path)
})


app.listen(8080, ()=>console.log("server started"))