stats.js

const path    = require('path')
    , colors  = require('colors')
    , fs      = require('fs')
    , strings = require('./strings')

function stats (config) {
  var data      = require(path.join(__dirname, '..', config.inFile))
    , byTag     = {}
    , byCount   = {}
    , byMainTag = {}
    , optReg    = /,? \{ tag: '([^']+)', label: '([^']+)' \}/gm
    , contents  = String(fs.readFileSync('index.html', 'utf-8'))
    , mainTags  = String(contents).match(optReg).map(function (o) { return o.match(new RegExp(optReg.source))[1] })
    , pushTag   = function (hash, tag, d) {
        (hash[tag] || (hash[tag] = [])).push(d)
      }

  data.forEach(function (d) {
    d.tags && d.tags.forEach(function (tag) {
      pushTag(byTag, tag, d)
      mainTags.indexOf(tag) != -1 && pushTag(byMainTag, tag, d)
    })
  })

  console.log('TAG COUNTS'.green.bold, '  (all tags found in data.js)')
  console.log(strings.rpad('Count', 7).yellow.bold, 'Tags'.bold)
  console.log('------------'.bold)

  Object.keys(byTag).forEach(function (tag) {
    (byCount[byTag[tag].length] || (byCount[byTag[tag].length] = [])).push(tag)
  })

  Object.keys(byCount).sort(function (x, y) { return x - y }).forEach(function (count) {
    console.log(strings.rpad(String(count), 7).yellow.bold, byCount[count].sort().join(', '))
  })

  console.log('\nMAIN TAGS'.green.bold, '  (only tags used in index.html)')
  console.log(strings.rpad('Tag', 13).yellow.bold, 'Count  Libs'.bold)
  console.log('-------------------------'.bold)

  mainTags.forEach(function (tag) {
    var h = byMainTag[tag]
    console.log(
        strings.rpad(tag, 13).yellow.bold
      , strings.rpad(String(h ? h.length : 0), 6).bold
      , h ? h.map(function (d) { return d.name }).sort().join(', ') : ''
    )
  })
}

module.exports = stats