class Tram.RegistrationForm extends Backbone.Model
  defaults:
    username: ''
    password1: ''
    password2: ''
  validate: (attrs, options) ->
    @unset('username-errors')
    @unset('password1-errors')
    @unset('password2-errors')
    if (attrs.username ? '').trim() is ''
      @set('username-errors', ['This field is required.'])
    if (attrs.password1 ? '') is ''
      @set('password1-errors', ['This field is required.'])
    if (attrs.password1 ? '') isnt (attrs.password2 ? '')
      @set('password2-errors', ['Passwords must match.'])
    else if (attrs.password2 ? '') is ''
      @set('password2-errors', ['This field is required.'])
    return @has('username-errors') or @has('password1-errors') or @has('password2-errors')
class Tram.ProfileForm extends Backbone.Model
  defaults:
    fullname: ''
    nickname: ''
    avatar: ''
  validate: (attrs, options) ->
    @unset('avatar-errors')
    ae = []
    file = $('#avatar').get(0).files[0]
    if file?
      if not file.type.match('image/.*')?
        ae.push("File doesn't look like an image.")
      if file.size > 64 * 1024
        ae.push('File is too big.')
    if ae.length > 0
      @set('avatar-errors', ae)
    return @has('avatar-errors')
class Tram.ConnectionForm extends Backbone.Model
  defaults:
    username: ''
    password: ''
  validate: (attrs, options) ->
    @unset('username-errors')
    @unset('password-errors')
    @unset('auth-errors')
    if (attrs.username ? '').trim() is ''
      @set('username-errors', ['This field is required.'])
    if (attrs.password ? '') is ''
      @set('password-errors', ['This field is required.'])
    return @has('username-errors') or @has('password-errors')
$.fn.streamline = ->
  @each ->
    $form = $(@)
    $form.find('input').on 'keydown', (e) ->
      if (not @required or @value isnt '') and e.keyCode is 13
        e.preventDefault()
        index = $form.find('input').index(@)
        $next = $form.find('input').eq(index + 1)
        if $next.length isnt 0
          $next.focus()
        else
          $form.find('button').trigger('click')