From 7eac723a669a4c2ccb535665a69c7b6e2c06ae3a Mon Sep 17 00:00:00 2001
From: Alexander Marychev <killondark@gmail.com>
Date: Sat, 22 Feb 2025 13:18:34 +0300
Subject: [PATCH 1/2] Add regexp_pattern checker to moderate

---
 README.md                      |  3 +++
 lib/moderate.rb                |  3 ++-
 lib/moderate/text.rb           | 14 ++++++++++++--
 lib/moderate/text_validator.rb |  1 -
 4 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 71f437a..2684272 100644
--- a/README.md
+++ b/README.md
@@ -60,6 +60,9 @@ Moderate.configure do |config|
 
   # Exclude words from the default list (false positives)
   config.excluded_words = ["good"]
+
+  # Matchind text_field with regexp pattern
+  config.regexp_pattern = /.*bad_pattern.*/
 end
 ```
 
diff --git a/lib/moderate.rb b/lib/moderate.rb
index 1d3b8fc..caa9827 100644
--- a/lib/moderate.rb
+++ b/lib/moderate.rb
@@ -23,12 +23,13 @@ def configure
   end
 
   class Configuration
-    attr_accessor :error_message, :additional_words, :excluded_words
+    attr_accessor :error_message, :additional_words, :excluded_words, :regexp_pattern
 
     def initialize
       @error_message = "contains moderatable content (bad words)"
       @additional_words = []
       @excluded_words = []
+      @regexp_pattern = nil
     end
   end
 end
diff --git a/lib/moderate/text.rb b/lib/moderate/text.rb
index c4384e4..3e4b43c 100644
--- a/lib/moderate/text.rb
+++ b/lib/moderate/text.rb
@@ -6,6 +6,8 @@ class << self
       def bad_words?(text)
         return false if text.blank?
 
+        return true if match_regexp_pattern?(text)
+
         @words_set ||= Set.new(compute_word_list)
         text.downcase.split(/\W+/).any? { |word| @words_set.include?(word) }
       end
@@ -19,8 +21,8 @@ def compute_word_list
           words
         end
 
-        result = (@default_words + Moderate.configuration.additional_words -
-                 Moderate.configuration.excluded_words).to_set
+        result = (@default_words + configuration.additional_words -
+                 configuration.excluded_words).to_set
         logger.debug("[moderate gem] Final word list size: #{result.size}")
         result
       end
@@ -33,6 +35,14 @@ def reset_word_list!
       def logger
         @logger ||= defined?(Rails) ? Rails.logger : Logger.new($stdout)
       end
+
+      def configuration
+        @configuration ||= Moderate.configuration
+      end
+
+      def match_regexp_pattern?(text)
+        configuration.regexp_pattern.is_a?(Regexp) && configuration.regexp_pattern.match?(text)
+      end
     end
   end
 end
diff --git a/lib/moderate/text_validator.rb b/lib/moderate/text_validator.rb
index 084a16b..e1e8068 100644
--- a/lib/moderate/text_validator.rb
+++ b/lib/moderate/text_validator.rb
@@ -22,6 +22,5 @@ def validate_each(record, attribute, value)
         end
       end
     end
-
   end
 end

From b67b3fb09591ed323e5a449e19ca31d30633eeb9 Mon Sep 17 00:00:00 2001
From: Alexander Marychev <killondark@gmail.com>
Date: Mon, 24 Feb 2025 09:51:42 +0300
Subject: [PATCH 2/2] Add whitelist_regexp_pattern checker to moderate

---
 README.md            |  7 +++++--
 lib/moderate.rb      |  9 +++++++--
 lib/moderate/text.rb | 15 ++++++++++++---
 3 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 2684272..30ae743 100644
--- a/README.md
+++ b/README.md
@@ -61,8 +61,11 @@ Moderate.configure do |config|
   # Exclude words from the default list (false positives)
   config.excluded_words = ["good"]
 
-  # Matchind text_field with regexp pattern
-  config.regexp_pattern = /.*bad_pattern.*/
+  # Matchind text_field with blacklist regexp pattern
+  config.blacklist_regexp_pattern = /.*bad_pattern.*/
+
+  # Matchind text_field with whitelist regexp pattern
+  config.whitelist_regexp_pattern = /.*good_pattern.*/
 end
 ```
 
diff --git a/lib/moderate.rb b/lib/moderate.rb
index caa9827..7b6cdd4 100644
--- a/lib/moderate.rb
+++ b/lib/moderate.rb
@@ -23,13 +23,18 @@ def configure
   end
 
   class Configuration
-    attr_accessor :error_message, :additional_words, :excluded_words, :regexp_pattern
+    ACCESSORS = %i[
+      error_message additional_words excluded_words blacklist_regexp_pattern whitelist_regexp_pattern
+    ].freeze
+
+    attr_accessor(*ACCESSORS)
 
     def initialize
       @error_message = "contains moderatable content (bad words)"
       @additional_words = []
       @excluded_words = []
-      @regexp_pattern = nil
+      @blacklist_regexp_pattern = nil
+      @whitelist_regexp_pattern = nil
     end
   end
 end
diff --git a/lib/moderate/text.rb b/lib/moderate/text.rb
index 3e4b43c..e8f5365 100644
--- a/lib/moderate/text.rb
+++ b/lib/moderate/text.rb
@@ -6,7 +6,8 @@ class << self
       def bad_words?(text)
         return false if text.blank?
 
-        return true if match_regexp_pattern?(text)
+        return true if match_blacklist_regexp_pattern?(text)
+        return true if not_match_whitelist_regexp_pattern?(text)
 
         @words_set ||= Set.new(compute_word_list)
         text.downcase.split(/\W+/).any? { |word| @words_set.include?(word) }
@@ -40,8 +41,16 @@ def configuration
         @configuration ||= Moderate.configuration
       end
 
-      def match_regexp_pattern?(text)
-        configuration.regexp_pattern.is_a?(Regexp) && configuration.regexp_pattern.match?(text)
+      def match_blacklist_regexp_pattern?(text)
+        pattern = configuration.blacklist_regexp_pattern
+
+        pattern.is_a?(Regexp) && pattern.match?(text)
+      end
+
+      def not_match_whitelist_regexp_pattern?(text)
+        pattern = configuration.whitelist_regexp_pattern
+
+        pattern.is_a?(Regexp) && !pattern.match?(text)
       end
     end
   end