First checkin

app/models/person.rb

@@ -0,0 +1,71 @@
+class Person < ActiveRecord::Base
+  attr_accessible :email, :first_name, :last_name, :public_name, :biography, :company
+
+  has_many :event_people, :dependent => :destroy
+  has_many :events, :through => :event_people, :uniq => true
+  has_many :registrations, :dependent => :destroy
+  validates :first_name, :presence => true
+  validates :last_name, :presence => true
+  validate :biography_limit
+
+  before_create :generate_guid
+  before_save :set_public_name
+
+  def to_s
+    if self.public_name.empty?
+      self.first_name + " " + self.last_name
+    else
+      self.public_name
+    end
+  end
+
+  def withdraw_proposal id
+    proposal = self.events.find_by_id(id)
+    if !proposal.nil?
+      proposal.withdraw
+      proposal.save
+    end
+  end
+
+  def attending_conference? conference
+    Registration.where(:conference_id => conference.id,
+                       :person_id => self.id).count
+  end
+
+  def proposals conference
+    self.events.where("conference_id = ? AND state != ? AND state != ?", conference.id, "withdrawn", "rejected")
+  end
+
+  def proposal_count conference
+    proposals(conference).count
+  end
+
+  def biography_word_count
+    if self.biography.nil?
+      0
+    else
+      self.biography.split.size
+    end
+  end
+
+  private
+  def biography_limit
+    if self.biography.split.size > 150
+      errors.add(:abstract, "cannot have more than 150 words")
+    end
+  end
+
+  def set_public_name
+    if public_name.empty?
+      self.public_name = "#{first_name} #{last_name}"
+    end
+  end
+
+  def generate_guid
+    begin
+      guid = SecureRandom.urlsafe_base64
+    end while Person.where(:guid => guid).exists?
+    self.guid = guid
+  end
+
+end