6 files changed, 146 insertions, 0 deletions
diff --git a/app/validators/color_validator.rb b/app/validators/color_validator.rb
new file mode 100644
index 00000000000..571d0007aa2
--- /dev/null
+++ b/app/validators/color_validator.rb
@@ -0,0 +1,20 @@
+# ColorValidator
+#
+# Custom validator for web color codes. It requires the leading hash symbol and
+# will accept RGB triplet or hexadecimal formats.
+#
+# Example:
+#
+#   class User < ActiveRecord::Base
+#     validates :background_color, allow_blank: true, color: true
+#   end
+#
+class ColorValidator < ActiveModel::EachValidator
+  PATTERN = /\A\#[0-9A-Fa-f]{3}{1,2}+\Z/.freeze
+
+  def validate_each(record, attribute, value)
+    unless value =~ PATTERN
+      record.errors.add(attribute, "must be a valid color code")
+    end
+  end
+end
diff --git a/app/validators/email_validator.rb b/app/validators/email_validator.rb
new file mode 100644
index 00000000000..b35af100803
--- /dev/null
+++ b/app/validators/email_validator.rb
@@ -0,0 +1,18 @@
+# EmailValidator
+#
+# Based on https://github.com/balexand/email_validator
+#
+# Extended to use only strict mode with following allowed characters:
+# ' - apostrophe
+#
+# See http://www.remote.org/jochen/mail/info/chars.html
+#
+class EmailValidator < ActiveModel::EachValidator
+  PATTERN = /\A\s*([-a-z0-9+._']{1,64})@((?:[-a-z0-9]+\.)+[a-z]{2,})\s*\z/i.freeze
+
+  def validate_each(record, attribute, value)
+    unless value =~ PATTERN
+      record.errors.add(attribute, options[:message] || :invalid)
+    end
+  end
+end
diff --git a/app/validators/line_code_validator.rb b/app/validators/line_code_validator.rb
new file mode 100644
index 00000000000..ed29e5aeb67
--- /dev/null
+++ b/app/validators/line_code_validator.rb
@@ -0,0 +1,12 @@
+# LineCodeValidator
+#
+# Custom validator for GitLab line codes.
+class LineCodeValidator < ActiveModel::EachValidator
+  PATTERN = /\A[a-z0-9]+_\d+_\d+\z/.freeze
+
+  def validate_each(record, attribute, value)
+    unless value =~ PATTERN
+      record.errors.add(attribute, "must be a valid line code")
+    end
+  end
+end
diff --git a/app/validators/namespace_name_validator.rb b/app/validators/namespace_name_validator.rb
new file mode 100644
index 00000000000..2e51af2982d
--- /dev/null
+++ b/app/validators/namespace_name_validator.rb
@@ -0,0 +1,10 @@
+# NamespaceNameValidator
+#
+# Custom validator for GitLab namespace name strings.
+class NamespaceNameValidator < ActiveModel::EachValidator
+  def validate_each(record, attribute, value)
+    unless value =~ Gitlab::Regex.namespace_name_regex
+      record.errors.add(attribute, Gitlab::Regex.namespace_name_regex_message)
+    end
+  end
+end
diff --git a/app/validators/namespace_validator.rb b/app/validators/namespace_validator.rb
new file mode 100644
index 00000000000..10e35ce665a
--- /dev/null
+++ b/app/validators/namespace_validator.rb
@@ -0,0 +1,50 @@
+# NamespaceValidator
+#
+# Custom validator for GitLab namespace values.
+#
+# Values are checked for formatting and exclusion from a list of reserved path
+# names.
+class NamespaceValidator < ActiveModel::EachValidator
+  RESERVED = %w(
+    admin
+    all
+    assets
+    ci
+    dashboard
+    files
+    groups
+    help
+    hooks
+    issues
+    merge_requests
+    notes
+    profile
+    projects
+    public
+    repository
+    s
+    search
+    services
+    snippets
+    teams
+    u
+    unsubscribes
+    users
+  ).freeze
+
+  def validate_each(record, attribute, value)
+    unless value =~ Gitlab::Regex.namespace_regex
+      record.errors.add(attribute, Gitlab::Regex.namespace_regex_message)
+    end
+
+    if reserved?(value)
+      record.errors.add(attribute, "#{value} is a reserved name")
+    end
+  end
+
+  private
+
+  def reserved?(value)
+    RESERVED.include?(value)
+  end
+end
diff --git a/app/validators/url_validator.rb b/app/validators/url_validator.rb
new file mode 100644
index 00000000000..2848b9cd33d
--- /dev/null
+++ b/app/validators/url_validator.rb
@@ -0,0 +1,36 @@
+# UrlValidator
+#
+# Custom validator for URLs.
+#
+# By default, only URLs for the HTTP(S) protocols will be considered valid.
+# Provide a `:protocols` option to configure accepted protocols.
+#
+# Example:
+#
+#   class User < ActiveRecord::Base
+#     validates :personal_url, url: true
+#
+#     validates :ftp_url, url: { protocols: %w(ftp) }
+#
+#     validates :git_url, url: { protocols: %w(http https ssh git) }
+#   end
+#
+class UrlValidator < ActiveModel::EachValidator
+  def validate_each(record, attribute, value)
+    unless valid_url?(value)
+      record.errors.add(attribute, "must be a valid URL")
+    end
+  end
+
+  private
+
+  def default_options
+    @default_options ||= { protocols: %w(http https) }
+  end
+
+  def valid_url?(value)
+    options = default_options.merge(self.options)
+
+    value =~ /\A#{URI.regexp(options[:protocols])}\z/
+  end
+end