Use coffeescript

1 files changed, 145 insertions, 0 deletions

diff --git a/public/js/calculator.coffee b/public/js/calculator.coffee
new file mode 100644
index 00000000..ed199920
--- /dev/null
+++ b/public/js/calculator.coffee
@@ -0,0 +1,145 @@
+#= require jquery-1.8.2.min.js
+#= require moment.min.js
+#= require qr.js
+#= require bootstrap.min.js
+
+g = exports ? this
+
+$(->
+  g.websocket = null
+  g.client = $('#client').val()
+  g.title = get('title')
+  g.address = get('address')
+  g.commission = get('commission')
+  g.logo = get('logo')
+  g.exchange = 0
+
+  setupPage()
+  setupQR()
+  setupSocket()
+
+  if client? and client
+    $.getJSON('client/' + client, (data) ->
+      user = data[0]
+      g.title = user.title 
+      g.address = user.address 
+      g.commission = user.commission 
+      g.logo = user.logo 
+      setupPage()
+    )
+
+  $('#amount').keyup(updateTotal)
+  $('#amount').focus()
+  $('#amount').focus(->
+    $('#received').hide()
+    $('#payment').fadeIn('slow')
+    $(this).val('')
+    updateTotal()
+  )
+)
+
+updateTotal = ->
+  amount = parseFloat($('#amount').val())
+  total = amount / exchange
+  total = Math.ceil(total * 10000) / 10000
+
+  unless $.isNumeric(total)
+    total = ''
+
+  $('#total').html(total.toString())
+  displayQR('bitcoin:' + address + '?amount=' + total.toString())
+
+exchangeFail = ->
+  $('#error').show().html("Error fetching exchange rate")
+  $('#calculator').hide()
+
+fetchExchangeRate = ->
+  $.getJSON('ticker') 
+    .success((data) -> 
+      unless data?
+        exchangeFail()
+        return
+
+      exchange = 1000 / data.out
+      exchange = exchange - exchange * commission * 0.01
+      g.exchange = Math.ceil(exchange * 100) / 100
+      $('#exchange').val(exchange.toFixed(2))
+      updateTotal()
+
+      $('#error').hide()
+      $('#calculator').fadeIn('slow')
+  ).error(exchangeFail)
+  setTimeout(fetchExchangeRate, 900000)
+
+setupPage = ->
+  unless address
+    address = '1VAnbtCAnYccECnjaMCPnWwt81EHCVgNr'
+
+  unless commission
+    commission = 3
+
+  if logo
+    $('#logo').attr('src', logo).show()
+  else
+    $('#title').html(title)
+
+  $('#address').html(address)
+  $('#received').hide()
+
+  fetchExchangeRate()
+
+setupSocket = ->
+  setTimeout(setupSocket, 10000)
+
+  unless g.websocket and g.websocket.readyState is 1
+    g.websocket = new WebSocket("ws://api.blockchain.info:8335/inv")
+
+    g.websocket.onopen = -> 
+      g.websocket.send('{"op":"addr_sub", "addr":"' + address + '"}')
+    
+
+    g.websocket.onerror = g.websocket.onclose = ->
+      $('#calculator').hide()
+      $('#error').show().html("Error connecting to payment server")
+    
+
+    g.websocket.onmessage = (e) ->
+      results = eval('(' + e.data + ')')
+      from_address = ''
+      total = 0
+      received = 0
+      
+      $.each(results.x.out, (i, v) ->
+        if (v.addr == address) 
+          received += v.value / 100000000
+      )
+
+      $.each(results.x.inputs, (i, v) ->
+        from_address = v.prev_out.addr
+        if (v.prev_out.addr == address) 
+          input -= v.prev_out.value / 100000000
+      )
+
+      if (total <= received) 
+        $('#amount').blur()
+        $('#payment').hide()
+        $('#received').fadeIn('slow')
+
+      $.get('record_transaction.php',
+          address: from_address,
+          date: moment().format("YYYY-MM-DD HH:mm:ss"),
+          received: received,
+          exchange: g.exchange
+      )
+
+get = (name) ->
+  name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]")
+  regexS = "[\\?&]" + name + "=([^&#]*)"
+  regex = new RegExp(regexS)
+  results = regex.exec(window.location.search)
+
+  if (results == null)
+    return ""
+  else
+    return decodeURIComponent(results[1].replace(/\+/g, " "))
+