From e3966c833f48c3fa6c6d88cdfba7a44bc075fdc3 Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Thu, 4 Feb 2016 12:35:33 +0100
Subject: [PATCH] Fix `he'll` from warning for `hell`

Related to wooorm/alex#73.
---
 component.json |  1 +
 index.js       | 24 ++++++++++++++++++++++--
 package.json   |  1 +
 test.js        | 18 +++++++++++++++++-
 4 files changed, 41 insertions(+), 3 deletions(-)

diff --git a/component.json b/component.json
index 54748e6..d89b888 100644
--- a/component.json
+++ b/component.json
@@ -15,6 +15,7 @@
   "repository": "wooorm/retext-profanities",
   "dependencies": {
     "sindresorhus/array-differ": "^1.0.0",
+    "jonschlinkert/array-intersection": "^0.1.2",
     "wooorm/nlcst-to-string": "^1.1.0",
     "wooorm/nlcst-search": "^1.0.0",
     "wooorm/profanities": "^1.0.0",
diff --git a/index.js b/index.js
index 696f6be..48cec66 100644
--- a/index.js
+++ b/index.js
@@ -15,11 +15,18 @@
  */
 
 var difference = require('array-differ');
+var intersection = require('array-intersection');
 var nlcstToString = require('nlcst-to-string');
 var quotation = require('quotation');
 var search = require('nlcst-search');
 var profanities = require('profanities');
 
+/*
+ * List of values not to normalize.
+ */
+
+var APOSTROPHES = ['hell'];
+
 /**
  * Attacher.
  *
@@ -34,6 +41,8 @@ var profanities = require('profanities');
 function attacher(processor, options) {
     var ignore = (options || {}).ignore || [];
     var phrases = difference(profanities, ignore);
+    var apostrophes = difference(phrases, APOSTROPHES);
+    var noApostrophes = intersection(APOSTROPHES, phrases);
 
     /**
      * Search `tree` for validations.
@@ -42,7 +51,15 @@ function attacher(processor, options) {
      * @param {VFile} file - Virtual file.
      */
     function transformer(tree, file) {
-        search(tree, phrases, function (match, position, parent, phrase) {
+        /**
+         * Handle a match.
+         *
+         * @param {Array.<Node>} match - Matched nodes.
+         * @param {Position} position - Location.
+         * @param {Node} parent - Parent of `match`.
+         * @param {string} phrase - Matched value.
+         */
+        function handle(match, position, parent, phrase) {
             var message = file.warn([
                 'Don’t use',
                 quotation(nlcstToString(match), '“', '”') + ',',
@@ -54,7 +71,10 @@ function attacher(processor, options) {
 
             message.ruleId = phrase;
             message.source = 'retext-profanities';
-        });
+        }
+
+        search(tree, apostrophes, handle);
+        search(tree, noApostrophes, handle, true);
     }
 
     return transformer;
diff --git a/package.json b/package.json
index d981b7b..ff7c01a 100644
--- a/package.json
+++ b/package.json
@@ -23,6 +23,7 @@
   "author": "Titus Wormer <tituswormer@gmail.com> (http://wooorm.com)",
   "dependencies": {
     "array-differ": "^1.0.0",
+    "array-intersection": "^0.1.2",
     "nlcst-search": "^1.0.0",
     "nlcst-to-string": "^1.1.0",
     "profanities": "^1.0.0",
diff --git a/test.js b/test.js
index 3d20553..279e67e 100644
--- a/test.js
+++ b/test.js
@@ -23,7 +23,7 @@ var profanities = require('./');
  */
 
 test('profanities', function (t) {
-    t.plan(4);
+    t.plan(6);
 
     retext()
         .use(profanities)
@@ -56,4 +56,20 @@ test('profanities', function (t) {
                 'should not warn for `ignore`d phrases'
             );
         });
+
+    retext()
+        .use(profanities)
+        .process([
+            'When he’ll freeze over, hell freezes over.'
+        ].join('\n'), function (err, file) {
+            t.ifError(err, 'should not fail (#3)');
+
+            t.deepEqual(
+                file.messages.map(String),
+                [
+                    '1:25-1:29: Don’t use “hell”, it’s profane'
+                ],
+                'should correctly depend on apostrophes'
+            );
+        });
 });