Fix db:migrate and similar tasks

We saw errors from duplicate loading of LocalEmail and
LoginFormatValidation. The latter resulted in a crash.

In an attempt to ensure all subclasses of Couchrest::Model::Base are
loaded Couchrest::Model::Utils::Migrate requires all files in app/models.
We have an extension that does the same for the engines.

During this process LoginFormatValidation and LocalEmail were autoloaded
when 'identity' was required. Afterwards they were required again.
It looks like rails' autoload mechanism does not play nicely with require.

So to make sure they are not autoloaded first move the concerns and
helper classes into the lib directory and require them explicitly.

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