forgeplus/app/models/project_invite_link.rb

# == Schema Information
#
# Table name: project_invite_links
#
#  id         :integer          not null, primary key
#  project_id :integer
#  user_id    :integer
#  role       :integer          default("4")
#  is_apply   :boolean          default("1")
#  sign       :string(255)
#  expired_at :datetime
#  created_at :datetime         not null
#  updated_at :datetime         not null
#
# Indexes
#
#  index_project_invite_links_on_project_id  (project_id)
#  index_project_invite_links_on_sign        (sign)
#  index_project_invite_links_on_user_id     (user_id)
#

class ProjectInviteLink < ApplicationRecord

  default_scope { where("expired_at > ?", Time.now).or(where(expired_at: nil)) }

  belongs_to :project
  belongs_to :user
  has_many :applied_projects

  scope :with_project_id, -> (project_id) {where(project_id: project_id)}
  scope :with_user_id, -> (user_id) {where(user_id: user_id)}

  enum role: {manager: 3, developer: 4, reporter: 5}

  before_create :set_old_data_expired_at

  def self.random_hex_sign
    hex = (SecureRandom.hex(32))
    return hex unless ProjectInviteLink.where(sign: hex).exists?
  end

  def self.build!(project, user, role="developer", is_apply=true)
    self.create!(
      project_id: project&.id, 
      user_id: user&.id, 
      role: role, 
      is_apply: is_apply, 
      sign: random_hex_sign,
      expired_at: Time.now + 3.days
    )
  end

  private 
  def set_old_data_expired_at
    ProjectInviteLink.where(user_id: self.user_id, project_id: self.project, role: self.role, is_apply: self.is_apply).update_all(expired_at: Time.now)
  end


end