Add State#unwrap

CHANGELOG.md

@@ -1,3 +1,7 @@
+## [0.12.2] - 2024-07-27
+### Added
+- Add `Pathway::State#unwrap` and `Pathway::State#u` to access internal state
+
 ## [0.12.1] - 2024-06-23
 ### Added
 - Add support for pattern matching on `Result`, `State` and `Error` instances

lib/pathway.rb

@@ -63,13 +63,13 @@ def default_message_for(type)
   class State
     extend Forwardable
 
+    delegate %i([] []= fetch store include? values_at deconstruct_keys) => :@hash
+
     def initialize(operation, values = {})
       @hash = operation.context.merge(values)
       @result_key = operation.result_key
     end
 
-    delegate %i([] []= fetch store include? values_at deconstruct_keys) => :@hash
-
     def update(kargs)
       @hash.update(kargs)
       self
@@ -83,7 +83,24 @@ def to_hash
       @hash
     end
 
-    alias :to_h :to_hash
+    def unwrap(&bl)
+      params = bl.parameters
+      unless params.size > 0 && params.all? { _1 in [:key|:keyreq|:keyrest, *] }
+        raise 'only keyword arguments are supported for unwraping'
+      end
+
+      case params
+      in [*, [:keyrest, b], *]
+        bl.call(**to_hash)
+      else
+        keys = params.select { _1 in [:key|:keyreq,*] }.map(&:last)
+
+        bl.call(**to_hash.slice(*keys))
+      end
+    end
+
+    alias_method :to_h, :to_hash
+    alias_method :u, :unwrap
   end
 
   module Plugins

lib/pathway/plugins/auto_deconstruct_state/ruby3.rb

@@ -8,6 +8,7 @@ module DSLMethods
 
         def _callable(callable)
           if callable.is_a?(Symbol) && @operation.respond_to?(callable, true) &&
+            @operation.method(callable).arity != 0 &&
             @operation.method(callable).parameters.all? { _1 in [:key|:keyreq|:keyrest|:block,*] }
 
             -> state { @operation.send(callable, **state) }

lib/pathway/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Pathway
-  VERSION = '0.12.1'
+  VERSION = '0.12.2'
 end

pathway.gemspec

@@ -43,4 +43,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "pry"
   spec.add_development_dependency "pry-byebug"
   spec.add_development_dependency "pry-doc"
+  spec.add_development_dependency "pry-stack"
 end

spec/plugins/auto_deconstruct_state_spec.rb

@@ -36,8 +36,10 @@ def create_model(name:, email:, **)
           UserModel.new(name, email)
         end
 
-        def notify(value:, **)
-          @notifier.call(value)
+        def notify(s)
+          s.u do |value:|
+            @notifier.call(value)
+          end
         end
       end