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Sun, May 18, 6:20 PM

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diff --git a/app/models/soa.rb b/app/models/soa.rb
new file mode 100644
index 0000000..8cf823d
--- /dev/null
+++ b/app/models/soa.rb
@@ -0,0 +1,73 @@
+class SOA < Record
+ validates :domain_id, uniqueness: true
+ validates_numericality_of :serial, :refresh, :retry, :expire
+ validates_presence_of :contact
+
+ SOA_DEFAULTS = WebDNS.settings[:soa_defaults]
+ SOA_FIELDS = SOA_DEFAULTS.keys
+
+ SOA_FIELDS.each { |soa_entry|
+ attr_accessor soa_entry
+ }
+
+ # Handle SOA Fields
+ after_initialize :set_soa_fields
+
+ # Load soa fields on reload
+ def reload_with_soa_fields(*args)
+ reload_without_soa_fields(*args).tap {
+ set_soa_fields
+ }
+ end
+ alias_method_chain :reload, :soa_fields
+
+ before_validation :set_content
+ before_validation :update_serial, on: :update
+
+ def bump_serial!
+ with_lock {
+ reload
+ self.serial += 1
+ save!
+ }
+ end
+
+ def serial_changed?
+ return false if not self.content_changed?
+
+ serial_index = SOA_FIELDS.index(:serial)
+ old, new = content_change.map { |c|
+ (c || '').split(/\s+/)[serial_index]
+ }
+
+ old != new
+ end
+
+ private
+
+ # Callbacks
+
+ def set_soa_fields
+ content_values = (content || '').split(/\s+/)
+ SOA_DEFAULTS.each { |field, default_value|
+ val = content_values.shift || default_value
+ val = Integer(val) if default_value.is_a?(Integer)
+ send("#{field}=", val)
+ }
+ end
+
+ def set_content
+ self.content = SOA_FIELDS.map { |field| send(field) }.join(' ')
+ end
+
+ def update_serial
+ # Don't update if nothing has changed
+ return if not self.content_changed?
+ # Don't updade if serial is already changed
+ return if self.serial_changed?
+
+ self.serial += 1
+ set_content
+ end
+
+end
diff --git a/config/initializers/00_settings.rb b/config/initializers/00_settings.rb
index e69de29..991c443 100644
--- a/config/initializers/00_settings.rb
+++ b/config/initializers/00_settings.rb
@@ -0,0 +1,12 @@
+WebDNS = Base
+
+WebDNS.settings[:soa_defaults] = {
+ primary_ns: 'ns.example.com',
+ contact: 'domainmaster@example.com',
+ serial: 1,
+ refresh: 10_800,
+ retry: 3600,
+ expire: 604_800,
+ nx: 3600
+}
+

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