implements document type model, validations

Author: madoleary

app/models/document_type.rb

@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+require 'uri'
+
+# Validate whether text fields contain external links
+class ContainsExternalLinksValidator < ActiveModel::EachValidator
+  def validate_each(record, attribute, value)
+    uris = extract_uris(value)
+    record.errors.add(attribute, 'cannot contain external links') if uris.length.positive?
+  end
+
+  private
+
+  def extract_uris(value)
+    URI.extract(value)
+  end
+end
+
+# app/models/document_type.rb
+class DocumentType < ApplicationRecord
+  has_paper_trail
+
+  belongs_to :user, optional: true
+
+  has_many :documents
+
+  validates :name, length: { maximum: 50 }
+  validates :name, presence: true
+  validates :name, uniqueness: true
+  validates :name, contains_external_links: true
+  validates_format_of :name, with: /^[a-zA-Z\d ]*$/i, multiline: true, message: 'can only contain letters and numbers.'
+  validates :description, presence: true
+  validates :description, uniqueness: true
+  validates :description, length: { maximum: 200 }
+  validates :description, contains_external_links: true
+  validates :status, inclusion: { in: %w[approved pending declined], allow_nil: false }
+end