Class: Textus::Domain::Policy::Predicates::EtagMatch

Inherits:
Object
  • Object
show all
Defined in:
lib/textus/domain/policy/predicates/etag_match.rb

Overview

Advisory pre-flight etag check for policy explain. The authoritative compare-and-write stays in Envelope::IO::Writer (atomic write-then-audit, ADR 0017). Passes when no if_etag is supplied (params nil) — guard does not require it.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(if_etag: nil) ⇒ EtagMatch

Returns a new instance of EtagMatch.



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# File 'lib/textus/domain/policy/predicates/etag_match.rb', line 14

def initialize(if_etag: nil)
  @if_etag = if_etag
end

Instance Attribute Details

#reason ⇒ Object (readonly)

Returns the value of attribute reason.



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# File 'lib/textus/domain/policy/predicates/etag_match.rb', line 12

def reason
  @reason
end

Instance Method Details

#call(eval) ⇒ Object 



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# File 'lib/textus/domain/policy/predicates/etag_match.rb', line 20

def call(eval)
  return true if @if_etag.nil?
  return true if eval.envelope.nil? # creating; Writer handles race
  return true if eval.envelope.etag == @if_etag

  @reason = "etag mismatch: wanted #{@if_etag}, have #{eval.envelope.etag}"
  false
end

#name ⇒ Object 



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# File 'lib/textus/domain/policy/predicates/etag_match.rb', line 18

def name = "etag_match"