First crack

app/models/application.rb

@@ -0,0 +1,70 @@
+class Application < ApplicationRecord
+  has_many :application_groups, dependent: :destroy
+  has_many :allowed_groups, through: :application_groups, source: :group
+  has_many :oidc_authorization_codes, dependent: :destroy
+  has_many :oidc_access_tokens, dependent: :destroy
+
+  validates :name, presence: true
+  validates :slug, presence: true, uniqueness: { case_sensitive: false },
+                  format: { with: /\A[a-z0-9\-]+\z/, message: "only lowercase letters, numbers, and hyphens" }
+  validates :app_type, presence: true,
+                      inclusion: { in: %w[oidc trusted_header saml] }
+  validates :client_id, uniqueness: { allow_nil: true }
+
+  normalizes :slug, with: ->(slug) { slug.strip.downcase }
+
+  before_validation :generate_client_credentials, on: :create, if: :oidc?
+
+  # Scopes
+  scope :active, -> { where(active: true) }
+  scope :oidc, -> { where(app_type: "oidc") }
+  scope :trusted_header, -> { where(app_type: "trusted_header") }
+  scope :saml, -> { where(app_type: "saml") }
+
+  # Type checks
+  def oidc?
+    app_type == "oidc"
+  end
+
+  def trusted_header?
+    app_type == "trusted_header"
+  end
+
+  def saml?
+    app_type == "saml"
+  end
+
+  # Access control
+  def user_allowed?(user)
+    return false unless active?
+    return false unless user.active?
+
+    # If no groups are specified, allow all active users
+    return true if allowed_groups.empty?
+
+    # Otherwise, user must be in at least one of the allowed groups
+    (user.groups & allowed_groups).any?
+  end
+
+  # OIDC helpers
+  def parsed_redirect_uris
+    return [] unless redirect_uris.present?
+    JSON.parse(redirect_uris)
+  rescue JSON::ParserError
+    redirect_uris.split("\n").map(&:strip).reject(&:blank?)
+  end
+
+  def parsed_metadata
+    return {} unless metadata.present?
+    JSON.parse(metadata)
+  rescue JSON::ParserError
+    {}
+  end
+
+  private
+
+  def generate_client_credentials
+    self.client_id ||= SecureRandom.urlsafe_base64(32)
+    self.client_secret ||= SecureRandom.urlsafe_base64(48)
+  end
+end

app/models/application_group.rb

@@ -0,0 +1,6 @@
+class ApplicationGroup < ApplicationRecord
+  belongs_to :application
+  belongs_to :group
+
+  validates :application_id, uniqueness: { scope: :group_id }
+end

app/models/current.rb

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+class Current < ActiveSupport::CurrentAttributes
+  attribute :session
+  delegate :user, to: :session, allow_nil: true
+end

app/models/group.rb

@@ -0,0 +1,9 @@
+class Group < ApplicationRecord
+  has_many :user_groups, dependent: :destroy
+  has_many :users, through: :user_groups
+  has_many :application_groups, dependent: :destroy
+  has_many :applications, through: :application_groups
+
+  validates :name, presence: true, uniqueness: { case_sensitive: false }
+  normalizes :name, with: ->(name) { name.strip.downcase }
+end

app/models/oidc_access_token.rb

@@ -0,0 +1,34 @@
+class OidcAccessToken < ApplicationRecord
+  belongs_to :application
+  belongs_to :user
+
+  before_validation :generate_token, on: :create
+  before_validation :set_expiry, on: :create
+
+  validates :token, presence: true, uniqueness: true
+
+  scope :valid, -> { where("expires_at > ?", Time.current) }
+  scope :expired, -> { where("expires_at <= ?", Time.current) }
+
+  def expired?
+    expires_at <= Time.current
+  end
+
+  def active?
+    !expired?
+  end
+
+  def revoke!
+    update!(expires_at: Time.current)
+  end
+
+  private
+
+  def generate_token
+    self.token ||= SecureRandom.urlsafe_base64(48)
+  end
+
+  def set_expiry
+    self.expires_at ||= 1.hour.from_now
+  end
+end

app/models/oidc_authorization_code.rb

@@ -0,0 +1,35 @@
+class OidcAuthorizationCode < ApplicationRecord
+  belongs_to :application
+  belongs_to :user
+
+  before_validation :generate_code, on: :create
+  before_validation :set_expiry, on: :create
+
+  validates :code, presence: true, uniqueness: true
+  validates :redirect_uri, presence: true
+
+  scope :valid, -> { where(used: false).where("expires_at > ?", Time.current) }
+  scope :expired, -> { where("expires_at <= ?", Time.current) }
+
+  def expired?
+    expires_at <= Time.current
+  end
+
+  def valid?
+    !used? && !expired?
+  end
+
+  def consume!
+    update!(used: true)
+  end
+
+  private
+
+  def generate_code
+    self.code ||= SecureRandom.urlsafe_base64(32)
+  end
+
+  def set_expiry
+    self.expires_at ||= 10.minutes.from_now
+  end
+end

app/models/session.rb

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+class Session < ApplicationRecord
+  belongs_to :user
+
+  before_create :set_expiry
+  before_save :update_activity
+
+  # Scopes
+  scope :active, -> { where("expires_at > ?", Time.current) }
+  scope :expired, -> { where("expires_at <= ?", Time.current) }
+
+  def expired?
+    expires_at.present? && expires_at <= Time.current
+  end
+
+  def active?
+    !expired?
+  end
+
+  def touch_activity!
+    update_column(:last_activity_at, Time.current)
+  end
+
+  private
+
+  def set_expiry
+    self.expires_at ||= remember_me ? 30.days.from_now : 24.hours.from_now
+    self.last_activity_at ||= Time.current
+  end
+
+  def update_activity
+    self.last_activity_at = Time.current if expires_at_changed? || new_record?
+  end
+end

app/models/user.rb

@@ -0,0 +1,78 @@
+class User < ApplicationRecord
+  has_secure_password
+  has_many :sessions, dependent: :destroy
+  has_many :user_groups, dependent: :destroy
+  has_many :groups, through: :user_groups
+
+  # Token generation for passwordless flows
+  generates_token_for :invitation, expires_in: 7.days
+  generates_token_for :password_reset, expires_in: 1.hour
+  generates_token_for :magic_login, expires_in: 15.minutes
+
+  normalizes :email_address, with: ->(e) { e.strip.downcase }
+
+  validates :email_address, presence: true, uniqueness: { case_sensitive: false },
+                           format: { with: URI::MailTo::EMAIL_REGEXP }
+  validates :status, presence: true,
+                    inclusion: { in: %w[active disabled pending_invitation] }
+
+  # Scopes
+  scope :active, -> { where(status: "active") }
+  scope :admins, -> { where(admin: true) }
+
+  # TOTP methods
+  def totp_enabled?
+    totp_secret.present?
+  end
+
+  def enable_totp!
+    require "rotp"
+    self.totp_secret = ROTP::Base32.random
+    self.backup_codes = generate_backup_codes
+    save!
+  end
+
+  def disable_totp!
+    update!(totp_secret: nil, totp_required: false, backup_codes: nil)
+  end
+
+  def totp_provisioning_uri(issuer: "Clinch")
+    return nil unless totp_enabled?
+
+    require "rotp"
+    totp = ROTP::TOTP.new(totp_secret, issuer: issuer)
+    totp.provisioning_uri(email_address)
+  end
+
+  def verify_totp(code)
+    return false unless totp_enabled?
+
+    require "rotp"
+    totp = ROTP::TOTP.new(totp_secret)
+    totp.verify(code, drift_behind: 30, drift_ahead: 30)
+  end
+
+  def verify_backup_code(code)
+    return false unless backup_codes.present?
+
+    codes = JSON.parse(backup_codes)
+    if codes.include?(code)
+      codes.delete(code)
+      update(backup_codes: codes.to_json)
+      true
+    else
+      false
+    end
+  end
+
+  def parsed_backup_codes
+    return [] unless backup_codes.present?
+    JSON.parse(backup_codes)
+  end
+
+  private
+
+  def generate_backup_codes
+    Array.new(10) { SecureRandom.alphanumeric(8).upcase }.to_json
+  end
+end

app/models/user_group.rb

@@ -0,0 +1,6 @@
+class UserGroup < ApplicationRecord
+  belongs_to :user
+  belongs_to :group
+
+  validates :user_id, uniqueness: { scope: :group_id }
+end