From f665c33e0066e6cfb9eba03d49b33c503b71dc7f Mon Sep 17 00:00:00 2001
From: Konstantin Lazarev <le6oww5k1@gmail.com>
Date: Thu, 12 Nov 2015 12:11:49 +0500
Subject: [PATCH] =?UTF-8?q?feature:=20=D0=BF=D0=B5=D1=80=D0=B5=D0=BD=D0=BE?=
 =?UTF-8?q?=D1=81=20=D0=BC=D0=B5=D1=82=D0=BE=D0=B4=D0=BE=D0=B2=20=D0=BE?=
 =?UTF-8?q?=D1=87=D0=B8=D1=81=D1=82=D0=BA=D0=B8=20=D0=BE=D1=82=20html-?=
 =?UTF-8?q?=D1=80=D0=B0=D0=B7=D0=BC=D0=B5=D1=82=D0=BA=D0=B8?=
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https://jira.railsc.ru/browse/CK-30
---
 lib/string_tools.rb       | 34 ++++++++++++++++++++++++++++++++++
 spec/string_tools_spec.rb | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+)

diff --git a/lib/string_tools.rb b/lib/string_tools.rb
index 9301404..f8f903e 100644
--- a/lib/string_tools.rb
+++ b/lib/string_tools.rb
@@ -105,6 +105,40 @@ def sanitize(text, options = {})
     def clear_control_characters(string)
       string.tr("\u0000-\u001f", '')
     end
+
+    # Public: вычищает все html тэги и пробельные символы
+    #
+    # string - String строка для очистки
+    #
+    # Examples
+    #
+    #   strip_all_tags_and_entities("<a>ссылка с&nbsp;пробелом</a><p>параграф&#9;с\tтабуляцией</p>")
+    #   # => "ссылкаспробелом параграфстабуляцией "
+    #
+    # Returns String
+    def strip_all_tags_and_entities(string)
+      Sanitize.fragment(string.gsub(/&#([0-9]|10|11|12|13);|&nbsp;|\xc2\xa0|\s/, ''))
+    end
+
+    # Public: вычищает html тэги кроме переносов
+    #
+    # string - String строка для очистки
+    #
+    # Examples
+    #
+    #   strip_tags_leave_br("<a></a><ul><li>элемент списка</li></ul><p>параграф</p>просто перенос<br>")
+    #   # => "<br />элемент списка<br /><br />параграф<br />просто перенос<br>"
+    #
+    # Returns String
+    def strip_tags_leave_br(string)
+      sanitized = Sanitize.fragment(string, remove_contents: %w(style javascript), elements: %w(p ul li br blockquote))
+
+      sanitized.gsub!(/<(p|li|blockquote)[^>]*>/, '')
+      sanitized.gsub!(%r{<(br /|ul[^>]*|/[^>]*)>}, '<br />')
+      sanitized.gsub!(/<br \/>(\s|\302\240)+/, '<br />')
+
+      sanitized
+    end
   end
   extend Sanitizing
 
diff --git a/spec/string_tools_spec.rb b/spec/string_tools_spec.rb
index 10b7a4d..1b737d5 100644
--- a/spec/string_tools_spec.rb
+++ b/spec/string_tools_spec.rb
@@ -32,4 +32,36 @@
       expect(sanitized_string).to eq '<a href="http://www.xn--80ajbaetq5a8a.xn--p1ai/">www.фермаежей.рф</a>'
     end
   end
+
+  describe '#strip_all_tags_and_entities' do
+    subject(:strip_all_tags_and_entities) { described_class.strip_all_tags_and_entities(string) }
+
+    context 'string with html tags' do
+      let(:string) { '<a>foo</a><div>bar</div>' }
+
+      it { expect(strip_all_tags_and_entities).to eq('foo bar ') }
+    end
+
+    context 'string with whitespaces and tabs' do
+      let(:string) { "foo&#9;bar\t  foo" }
+
+      it { expect(strip_all_tags_and_entities).to eq('foobarfoo') }
+    end
+  end
+
+  describe '#strip_tags_leave_br' do
+    subject(:strip_tags_leave_br) { described_class.strip_tags_leave_br(string) }
+
+    context 'string with html list' do
+      let(:string) { '<ul><li>foo</li></ul>' }
+
+      it { expect(strip_tags_leave_br).to eq('<br />foo<br /><br />') }
+    end
+
+    context 'string with html paragraph' do
+      let(:string) { '<p>bar</p>' }
+
+      it { expect(strip_tags_leave_br).to eq('bar<br />') }
+    end
+  end
 end