3 files changed, 119 insertions, 0 deletions
diff --git a/lib/email.rb b/lib/email.rb
new file mode 100644
index 0000000..4090275
--- /dev/null
+++ b/lib/email.rb
@@ -0,0 +1,31 @@
+class Email < String
+  include ActiveModel::Validations
+
+  validates :email,
+    :format => {
+      :with => /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/, #local part of email is case-sensitive, so allow uppercase letter.
+      :message => "needs to be a valid email address"
+    }
+
+  # Make sure we can call Email.new(nil) and get an invalid email address
+  def initialize(s)
+    super(s.to_s)
+  end
+
+  def to_partial_path
+    "emails/email"
+  end
+
+  def to_param
+    to_s
+  end
+
+  def email
+    self
+  end
+
+  def handle
+    self.split('@').first
+  end
+
+end
diff --git a/lib/local_email.rb b/lib/local_email.rb
new file mode 100644
index 0000000..7c592e1
--- /dev/null
+++ b/lib/local_email.rb
@@ -0,0 +1,67 @@
+require 'email'
+class LocalEmail < Email
+
+  BLACKLIST_FROM_RFC2142 = [
+    'postmaster', 'hostmaster', 'domainadmin', 'webmaster', 'www',
+    'abuse', 'noc', 'security', 'usenet', 'news', 'uucp',
+    'ftp', 'sales', 'marketing', 'support', 'info'
+  ]
+
+  def self.domain
+    APP_CONFIG[:domain]
+  end
+
+  validates :email,
+    :format => {
+      :with => /@#{domain}\Z/i,
+      :message => "needs to end in @#{domain}"
+    }
+
+  validate :handle_allowed
+
+  def initialize(s)
+    super
+    append_domain_if_needed
+  end
+
+  def to_key
+    [handle]
+  end
+
+  def domain
+    LocalEmail.domain
+  end
+
+  protected
+
+  def append_domain_if_needed
+    unless self.index('@')
+      self << '@' + domain
+    end
+  end
+
+  def handle_allowed
+    errors.add(:handle, "is reserved.") if handle_reserved?
+  end
+
+  def handle_reserved?
+    # *ARRAY in a case statement tests if ARRAY includes the handle.
+    case handle
+    when *APP_CONFIG[:handle_blacklist]
+      true
+    when *APP_CONFIG[:handle_whitelist]
+      false
+    when *BLACKLIST_FROM_RFC2142
+      true
+    else
+      handle_in_passwd?
+    end
+  end
+
+  def handle_in_passwd?
+    Etc.getpwnam(handle).present?
+  rescue ArgumentError
+    # handle was not found
+    return false
+  end
+end
diff --git a/lib/login_format_validation.rb b/lib/login_format_validation.rb
new file mode 100644
index 0000000..c1fcf70
--- /dev/null
+++ b/lib/login_format_validation.rb
@@ -0,0 +1,21 @@
+module LoginFormatValidation
+  extend ActiveSupport::Concern
+
+  #TODO: Probably will replace this. Playing with using it for aliases too, but won't want it connected to login field.
+
+  included do
+    # Have multiple regular expression validations so we can get specific error messages:
+    validates :login,
+      :format => { :with => /\A.{2,}\z/,
+        :message => "Must have at least two characters"}
+    validates :login,
+      :format => { :with => /\A[a-z\d_\.-]+\z/,
+        :message => "Only lowercase letters, digits, . - and _ allowed."}
+    validates :login,
+      :format => { :with => /\A[a-z].*\z/,
+        :message => "Must begin with a lowercase letter"}
+    validates :login,
+      :format => { :with => /\A.*[a-z\d]\z/,
+        :message => "Must end with a letter or digit"}
+  end
+end