Fixes #4223 - Zammad ignores CSS white-space: pre-wrap; and displays …

…multiline text in a single line.

config/initializers/html_sanitizer.rb

@@ -48,6 +48,7 @@
   'q'          => %w[cite],
   'span'       => %w[style],
   'div'        => %w[style],
+  'p'          => %w[style],
   'time'       => %w[datetime pubdate],
 }
 
@@ -64,6 +65,9 @@
   'div'   => %w[
     color
   ],
+  'p'     => %w[
+    white-space
+  ],
   'table' => %w[
     background background-color color font-size vertical-align
     margin margin-top margin-right margin-bottom margin-left
@@ -129,6 +133,10 @@
     'color:#ffffff',
     'color:rgb(0,0,0)',
   ],
+  'p'     => [
+    'white-space:nowrap',
+    'white-space:pre',
+  ],
   'table' => [
     'font-size:0',
     'font-size:0px',

lib/html_sanitizer/scrubber/cleanup.rb

@@ -27,7 +27,12 @@ def update_node_content(node)
       def remove_space_if_needed(content)
         return content if space_or_nl?(content)
 
-        content.gsub(%r{[[:space:]]+}, ' ')
+        # https://github.com/zammad/zammad/issues/4223
+        # We are converting multiple line breaks into a more readable format.
+        #   All other whitespace is treated as a single space character.
+        content.gsub(%r{[[:space:]]+}) do |match|
+          match.include?("\n\n") ? "\n\n" : ' '
+        end
       end
 
       def strip_if_needed_previous(node, content)

spec/lib/html_sanitizer/scrubber/cleanup_spec.rb

@@ -69,5 +69,20 @@
 
       it { is_expected.to eq target }
     end
+
+    context 'when p has style with white-space property' do
+      let(:input) do
+        '<p style="white-space: pre-wrap">Hi!
+
+This is a dummy text for   Zammad   to test multi-line text that is wrapped in a preformatted text block.</p>'
+      end
+      let(:target) do
+        '<p style="white-space: pre-wrap">Hi!
+
+This is a dummy text for Zammad to test multi-line text that is wrapped in a preformatted text block.</p>'
+      end
+
+      it { is_expected.to eq target }
+    end
   end
 end

spec/models/channel/email_parser_spec.rb

@@ -27,6 +27,10 @@
     #
     # File.write('test/data/mail/mailXXX.yml', Channel::EmailParser.new.parse(File.read('test/data/mail/mailXXX.box')).slice(:from, :from_email, :from_display_name, :to, :cc, :subject, :body, :content_type, :'reply-to', :attachments).to_yaml)
     #
+    # To renew all existing files, you can use the following code:
+    #
+    # Dir.glob(Rails.root.join('test/data/mail/mail*.box')).each { |mail_file| File.write(mail_file.gsub('.box', '.yml'), Channel::EmailParser.new.parse(File.read(mail_file)).slice(:from, :from_email, :from_display_name, :to, :cc, :subject, :body, :content_type, :'reply-to', :attachments).to_yaml) }
+    #
     context 'when checking a bunch of stored emails for correct parsing behaviour' do
       tests = Dir.glob(Rails.root.join('test/data/mail/mail*.box')).each do |stored_email|
         include_examples('parses email correctly', stored_email)

test/data/mail/mail002.yml

@@ -2,12 +2,14 @@
 from: Martin Edenhofer <martin@example.com>
 from_email: martin@example.com
 from_display_name: Martin Edenhofer
+to: metest@znuny.com
 subject: aaäöüßad asd
-content_type: text/plain
 body: |
   äöüß ad asd
 
   -Martin
 
   --
   Old programmers never die. They just branch to a new address.
+content_type: text/plain
+attachments: []

test/data/mail/mail004.yml

@@ -2,8 +2,8 @@
 from: '"Günther Katja | Example GmbH" <k.guenther@example.com>'
 from_email: k.guenther@example.com
 from_display_name: Günther Katja | Example GmbH
+to: Martin Edenhofer via Znuny Team <support@example.com>
 subject: 'AW: Ticket Templates [Ticket#11168]'
-content_type: text/plain
 body: |+
   Hallo Katja,
 
@@ -25,3 +25,6 @@ body: |+
    -Martin
 
 
+content_type: text/plain
+attachments: []
+...

test/data/mail/mail005.yml

@@ -2,8 +2,8 @@
 from: marc.smith@example.com (Marc Smith)
 from_email: marc.smith@example.com
 from_display_name: Marc Smith
+to: Martin Edenhofer via Znuny Team <support@znuny.com>
 subject: 'Re: XXXX Betatest Ticket Templates [Ticket#11162]'
-content_type: text/plain
 body: "Am 07.05.2012 08:10, schrieb Martin Edenhofer via Znuny Team:\n> Hallo Marc,\n>\n>
   super! Ich freu mich!\n>\n> Wir würden gerne die Präsentation/Einführung in die
   Ticket Templates per Screensharing oder zumindest per Telefon machen.\n>\n> Mögliche
@@ -22,3 +22,5 @@ body: "Am 07.05.2012 08:10, schrieb Martin Edenhofer via Znuny Team:\n> Hallo Ma
   könnten, da wir von dem \"Internet PC\" nicht auf \nunser XXXX zugreifen können.
   Falls ihr sonst noch irgendwas benötigt \neinfach kurz ne Rückmeldung...;-)\n\nGrüße
   aus Bonn\n\nJohn & Marc\n\n"
+content_type: text/plain
+attachments: []

test/data/mail/mail006.yml

@@ -4,10 +4,12 @@ from_email: me@bogen.net
 from_display_name: Hans BÄKOSchönland
 to: Namedyński (hans@example.com)
 subject: 'utf8: 使って / ISO-8859-1: Priorität"  / cp-1251: Сергей Углицких'
-body: '<div><p>this is a test</p></div><br><hr> <a href="http://localhost/8HMZENUS/2737??PS="
-  rel="nofollow noreferrer noopener" target="_blank" title="http://localhost/8HMZENUS/2737??PS=">Compare
-  Cable, DSL or Satellite plans: As low as $2.95. </a> <br> <br> Test1:– <br> Test2:&amp;
-  <br> Test3:∋ <br> Test4:&amp; <br> Test5:='
+body: |-
+  <div><p>this is a test</p></div><br><hr> <a href="http://localhost/8HMZENUS/2737??PS=" rel="nofollow noreferrer noopener" target="_blank" title="http://localhost/8HMZENUS/2737??PS=">Compare Cable, DSL or Satellite plans: As low as $2.95. </a>
+
+  <br>
+
+  <br> Test1:– <br> Test2:&amp; <br> Test3:∋ <br> Test4:&amp; <br> Test5:=
 content_type: text/html
 attachments:
 - !ruby/hash:ActiveSupport::HashWithIndifferentAccess

test/data/mail/mail008.yml

@@ -2,12 +2,14 @@
 from: Franz.Schaefer@example.com
 from_email: Franz.Schaefer@example.com
 from_display_name: ''
+to: support@example.com
 subject: 'could not rename: ZZZAAuto'
-content_type: text/html
 body: |-
   <img src="cid:_1_08FC9B5808FC7D5C004AD64FC1257A28">
   <br>
-  <br>Gravierend?<br> <table>
+  <br>Gravierend?<br>
+
+  <table>
   <tr>
   <td>Mit freundlichen Grüßen</td>
   </tr>
@@ -70,3 +72,72 @@ body: |-
   <td>Registergericht / Commercial Register of the Local Court: HRB 0000 AG Hof</td>
   </tr>
   </table>
+content_type: text/html
+attachments:
+- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
+  data: |2-
+
+    <br><img src=cid:_1_08FC9B5808FC7D5C004AD64FC1257A28>
+    <br>
+    <br><font size=2 face="sans-serif">Gravierend?<br>
+    </font>
+    <table>
+    <tr>
+    <td bgcolor=white><font size=2 face="sans-serif">Mit freundlichen Grüßen</font></table>
+    <br>
+    <table>
+    <tr>
+    <td bgcolor=white><font size=2 face="sans-serif"><b>Franz Schäfer</b></font>
+    <tr>
+    <td bgcolor=white><font size=2 face="sans-serif">Manager Information Systems</font></table>
+    <br>
+    <table>
+    <tr>
+    <td bgcolor=white><font size=2 face="sans-serif">Telefon &nbsp;</font>
+    <td bgcolor=white><font size=2 face="sans-serif">+49 000 000 8565</font>
+    <tr>
+    <td colspan=2 bgcolor=white><font size=2 face="sans-serif">christian.schaefer@example.com</font></table>
+    <br>
+    <table>
+    <tr>
+    <td bgcolor=white><font size=2 face="sans-serif"><b>Example Stoff GmbH</b></font>
+    <tr>
+    <td bgcolor=white><font size=2 face="sans-serif">Fakultaet</font>
+    <tr>
+    <td bgcolor=white><font size=2 face="sans-serif">Düsseldorfer Landstraße
+    395</font>
+    <tr>
+    <td bgcolor=white><font size=2 face="sans-serif">D-00000 Hof</font>
+    <tr>
+    <td bgcolor=white><a href=www.example.com><font size=2 color=blue face="sans-serif"><u>www.example.com</u></font></a></table>
+    <br>
+    <table>
+    <tr>
+    <td bgcolor=white>
+    <hr>
+    <tr>
+    <td bgcolor=white><font size=1 color=#808080 face="sans-serif">Geschäftsführung/Management
+    Board: Jan Bauer (Vorsitzender/Chairman), Oliver Bauer, Heiko Bauer,
+    Boudewijn Bauer</font>
+    <tr>
+    <td bgcolor=white><font size=1 color=#808080 face="sans-serif">Sitz der
+    Gesellschaft / Registered Office: Hof</font>
+    <tr>
+    <td bgcolor=white><font size=1 color=#808080 face="sans-serif">Registergericht
+    / Commercial Register of the Local Court: HRB 0000 AG Hof</font></table>
+    <br>
+  filename: message.html
+  preferences: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
+    content-alternative: true
+    original-format: true
+    Mime-Type: text/html
+    Charset: ISO-8859-1
+- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
+  data: !binary |-
+    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
+  filename: image.gif
+  preferences: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
+    Content-Type: image/gif
+    Content-ID: _1_08FC9B5808FC7D5C004AD64FC1257A28
+    Mime-Type: image/gif
+    Charset: UTF-8

test/data/mail/mail013.yml

@@ -2,7 +2,18 @@
 from: thomas.smith@example.com
 from_email: thomas.smith@example.com
 from_display_name: ''
-subject: 'Antwort: Probleme ADB / Anlegen von Tickets [Ticket#111079]'
 to: q1@znuny.com
-content_type: text/html
+subject: 'Antwort: Probleme ADB / Anlegen von Tickets [Ticket#111079]'
 body: "<p>JA</p>"
+content_type: text/html
+attachments:
+- !ruby/hash:ActiveSupport::HashWithIndifferentAccess
+  data: |-
+    <html><body>
+    <p><font size="2" face="sans-serif">JA</font></body></html>
+  filename: message.html
+  preferences: !ruby/hash:ActiveSupport::HashWithIndifferentAccess
+    content-alternative: true
+    original-format: true
+    Mime-Type: text/html
+    Charset: US-ASCII

test/data/mail/mail016.yml

@@ -4,7 +4,9 @@ from_display_name: ''
 to: '"enterprisemobility.apacservice" <enterprisemobility.apacservice@motorola.com>'
 subject: "【 直通美国排名第49大学 成功后付费 】"
 body: |-
-  新建网页 3 <span style=" color: blue;">
+  新建网页 3
+
+  <span style=" color: blue;">
   <div>您好，这封信如果影响到您的生活和工作，我们向您诚恳的道歉。</div><div>您回复此邮箱即可退订，以后绝对不会再次收到，</div><div>
   <strong>再次祝福您工作顺利，婚姻美满，家庭幸福，生意兴隆。</strong> </div><div> </div></span>
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