# Key-value store for runtime application settings that are configured through
# the web setup wizard (or updated by an administrator) rather than hard-coded
# in application.rb.
#
# Known keys:
#   skip_email_confirmation  – "true"/"false", mirrors the homonymous option
#                              that was previously in application.rb.
class Setting < ApplicationRecord
  validates :key, presence: true, uniqueness: true

  # Return the string value stored for +key+, or +default+ when absent.
  def self.get(key, default: nil)
    find_by(key: key)&.value || default
  end

  # Persist +value+ for +key+, creating the record if it does not yet exist.
  def self.set(key, value)
    find_or_initialize_by(key: key).update!(value: value.to_s)
  end
end