server.coffee

# require('coffee-script')
express = require 'express'
routes = require './private/routes/routes'
cradle = require 'cradle'
db_access = require './private/db/auth'
config = require './config'

app = module.exports = express()

VIEWS_PATH = __dirname + '/private/views'
PUBLIC_PATH = __dirname + '/public'
PORT = config.config.server.port or process.env.VMC_APP_PORT or 3000

# Configuration
app.configure( ->
	app.set 'views', 		VIEWS_PATH
	app.set 'view engine', 'jade'
	app.set 'view options', { layout: false }  # Option: pretty: true
	app.use express.bodyParser()
	app.use express.methodOverride()
	app.use app.router
	app.use express.static( PUBLIC_PATH )
)

app.configure 'development', ->
	app.use express.errorHandler { dumpExceptions: true, showStack: true }

app.configure 'production', ->
	app.use express.errorHandler()

# Setup the CouchDB connection
conn = new (cradle.Connection)(
	cache: true
	raw: false
	host: "http://127.0.0.1"
	port: 5984
	auth:
		username: db_access.auth.username
		password: db_access.auth.password
)

db = conn.database db_access.auth.name

db.exists( (err, exists) ->
	if ( err )
		throw new Error "an error in DB"
	else if ( exists )
		console.log "database has exists"
	else
		db.create()
		console.log "create a new database"
)

# Routes
app.get '/', routes.home  #routes.home: /routes/routes.js => exports.home()

app.get '/posts/new', routes.newPost  #routes.home: /routes/routes.js => exports.home()


# Fetch the blog posts
app.get "/posts", (req, res) ->
	db.get "_design/posts/_view/by_title", (err,doc) ->
		res.json doc

# Need to be after "/posts", because it is the fallback when 'posts' route is not matched
# when refresh the browser, it will maintain its state
app.get '/:id', routes.home

# Fetch the single blog post
app.get "/post/:id", (req, res) ->
	db.get req.params.id, (err, doc) ->
		res.json doc

# Create a new blog post
app.post '/posts/new', (req, res ) ->
	options =
		"title": req.body.title,
		"excerpt": req.body.excerpt,
		"content": req.body.content

	db.save options, (err, response)->
		db.get response.id, (err, doc) ->
			res.redirect('/') unless err

# Delete the existing post
app.delete '/post/:id', (req, res) ->
	db.get req.params.id, (err, doc) ->
		db.remove req.params.id, doc._rev, (err, response) ->
			res.send response

# Update the Comments in particular post
app.put '/post/:id', (req, res) ->
	comment = req.body.comments
	db.get req.params.id, (err, doc) ->
		unless doc.comments
			db.merge req.params.id, { "comments": [comment] }, (err, response) ->
				console.log err if err
				res.send response
		else
			doc.comments.push(comment)
			db.merge req.params.id, { "comments": doc.comments }, (err, response) ->
				console.log err if err
				res.send response

app.startServer =  ->
	app.listen PORT, ->
		console.log "Express server listening on port %d in %s mode", PORT, app.settings.env