Replace ActiveSupport with strings-inflection for pluralization

class2.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "activesupport", ">= 3.2", "< 7"
+  spec.add_dependency "strings-inflection", "~> 0.1"
 
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake", "~> 10.0"

lib/class2.rb

@@ -3,11 +3,44 @@
 require "date"
 require "time"                  # for parse()
 require "json"
-require "active_support/core_ext/module"
-require "active_support/inflector"
+require "strings/inflection"
 
 require "class2/version"
 
+# String extensions to replace ActiveSupport inflector functionality
+class String
+  def classify
+    # Use strings-inflection for singularization, then apply classification logic
+    # Handle the known issue with "address" -> "addres"
+    singular = case self
+                when /(.*)address(es)?$/
+                  # Handle any word ending with "address" or "addresses"
+                  prefix = $1
+                  prefix + 'address'
+                else
+                  Strings::Inflection.singularize(self)
+                end
+
+    singular.gsub(/\/(.?)/) { "::#{$1.upcase}" }.gsub(/(?:^|_)(.)/) { $1.upcase }
+  end
+
+  def pluralize
+    Strings::Inflection.pluralize(self)
+  end
+
+  def singularize
+    # Handle known issue with strings-inflection for "address"
+    case self
+    when /(.*)address(es)?$/
+      # Handle any word ending with "address" or "addresses"
+      prefix = $1
+      prefix + 'address'
+    else
+      Strings::Inflection.singularize(self)
+    end
+  end
+end
+
 no_export = ENV["CLASS2_NO_EXPORT"]
 
 unless no_export == "1"
@@ -251,8 +284,8 @@ def assign_attributes(attributes)
 
               name = key.to_s.classify
 
-              # parent is deprecated in ActiveSupport 6 and its warning uses Strong#squish! which they don't include!
-              parent = self.class.respond_to?(:module_parent) ? self.class.module_parent : self.class.parent
+              # Get the parent module (equivalent to ActiveSupport's module_parent/parent)
+              parent = self.class.name.split('::')[0..-2].inject(Object) { |mod, name| mod.const_get(name) }
               next unless parent.const_defined?(name)
 
               klass = parent.const_get(name)