index.js

if (typeof global.Promise === 'undefined') global.Promise = require('bluebird')

var express = require('express')
var hbs = require('hbs')
var harp = require('harp')
var path = require('path')
var cors = require('cors')
var find = require('lodash').find
var findIndex = require('lodash').findIndex
var merge = require('lodash').merge
var sortBy = require('lodash').sortBy
var some = require('lodash').some
var suggest = require(__dirname + '/lib/suggestions')
var redirects = require(__dirname + '/lib/redirects')

// Load section and page data
var content = require(path.resolve(__dirname, 'content.json'))

// Copy pages into their sections and sort them by order or title
content.sections.forEach(function (section) {
  section.pages = content.pages.filter(function (page) {
    return section.id === page.section
  })

  // Sort section pages if any of the pages have an `order` property
  // Pages without the order property will come last
  if (some(section.pages, 'order')) {
    section.pages = sortBy(section.pages, function (page) {
      return Number(page.order || 10000)
    })
  }
})

var lite = merge({}, content)
lite.sections = lite.sections.map(function (section) {
  section.pages = section.pages.map(function (page) {
    return page.href
  })
  return section
})
lite.pages = lite.pages.map(function (page) {
  delete page.content
  return page
})

// Configure Express
var app = module.exports = express()
app.set('view engine', 'hbs')
app.set('port', (process.env.PORT || 5000))
app.use(express.static(__dirname + '/public'))
app.use(harp.mount(__dirname + '/public'))
hbs.registerPartials(__dirname + '/views/partials')
hbs.registerHelper('equal', require('handlebars-helper-equal'))
hbs.registerHelper('breadcrumbs', function (options) {
  if (!options.fn) throw new Error('Handlebar helper "breadcrumbs" requires closing block.')

  var currSection = find(options.data.root.content.sections, function (section) {
    return section.id === options.data.root.page.section
  })

  var pageIndex = findIndex(currSection.pages, function (page) {
    return page.title === options.data.root.page.title
  })

  var out = {
    page: options.data.root.page,
    next: currSection.pages[pageIndex + 1],
    prev: currSection.pages[pageIndex - 1],
    section: currSection.title
  }

  return options.fn(out)
})

hbs.registerHelper('cleanPageTitle', function(context) {
  var re = /([0-9][0-9] - )(.*)/;
  var result = context.match(re);
  return (result) ?  result[2] : context;
})

app.get('/', function (req, res) {
  res.render('index', {
    content: content,
    recentlyUpdatedPages: [],
    pageId: 'index'
  })
})

app.get('/_monitor/ping', cors(), function (req, res) {
  res.status(200).send('pong')
})

app.get('/_monitor/status', cors(), function (req, res) {
  res.json({
    name: 'docs',
    pid: process.pid,
    uptime: process.uptime(),
    rss: process.memoryUsage()
  })
})

app.get('/content.json', cors(), function (req, res) {
  res.json(content)
})

app.get('/content.lite.json', cors(), function (req, res) {
  res.json(lite)
})

app.get('/all', function (req, res) {
  res.render('multi', {
    content: content,
    heading: 'All Docs',
    pageId: 'all-docs'
  })
})

app.get('/*', function (req, res) {
  if (req.path in redirects) {
    return res.redirect(301, redirects[req.path])
  }

  var page = find(content.pages, function (page) {
    return page.href === req.path
  })

  if (!page) {
    return res.status(404).render('404', {
      url: req.url,
      pageId: 'fourohfour',
      content: content,
      suggestions: suggest(req.path, content.pages)
    })
  }

  res.render('page', {
    page: page,
    content: content
  })
})

// This module.parent thing allows us to test the server using
// supertest without unnecessarily firing up the server.
if (!module.parent) {
  app.listen(app.get('port'), function () {
    console.log('Running at http://localhost:' + app.get('port'))
  })
}