From 9244a7f5f0b92f9b7974572b10653b207edc6c58 Mon Sep 17 00:00:00 2001
From: Karl Voit <git@Karl-Voit.at>
Date: Sat, 3 Oct 2020 16:53:10 +0200
Subject: [PATCH] Reading time estimations, fixing #47

---
 README.org                                    |  2 +
 lib/htmlizer.py                               | 81 ++++++++++++++++++-
 templates/blog-format.org                     | 36 +++++++++
 templates/public_voit.css                     | 19 +++--
 templates/public_voit.scss                    | 11 +++
 .../1985/01/01/old-entry1/index.html          |  4 +
 .../1985/01/01/old-entry10/index.html         |  4 +
 .../1985/01/01/old-entry11/index.html         |  4 +
 .../1985/01/01/old-entry12/index.html         |  4 +
 .../1985/01/01/old-entry13/index.html         |  4 +
 .../1985/01/01/old-entry14/index.html         |  4 +
 .../1985/01/01/old-entry2/index.html          |  4 +
 .../1985/01/01/old-entry3/index.html          |  4 +
 .../1985/01/01/old-entry4/index.html          |  4 +
 .../1985/01/01/old-entry5/index.html          |  4 +
 .../1985/01/01/old-entry6/index.html          |  4 +
 .../1985/01/01/old-entry7/index.html          |  4 +
 .../1985/01/01/old-entry8/index.html          |  4 +
 .../1985/01/01/old-entry9/index.html          |  4 +
 .../02/14/lazyblorg-example-entry/index.html  |  4 +
 .../comparison/2013/08/22/testid/index.html   |  4 +
 .../2014/01/30/full-syntax-test/index.html    |  4 +
 .../09/18/from-nothing-to-done/index.html     |  4 +
 .../10/31/an-hidden-blog-entry/index.html     |  6 +-
 .../2016/10/31/my-temporal-article/index.html |  6 +-
 .../11/06/sanitization-examples/index.html    |  4 +
 .../16/empty-language-autotag-page/index.html |  4 +
 .../2016/11/27/image-test/index.html          |  8 +-
 .../2016/11/27/special-characters/index.html  |  6 +-
 .../2017/01/08/sanitizing-tests/index.html    |  4 +
 .../2017/09/30/link-test/index.html           | 68 ++++++++++++++--
 .../2017/09/30/link-test/source.org.txt       | 65 +++++++++++++++
 .../index.html                                |  4 +
 .../comparison/about/index.html               |  4 +
 ...zyblorg-all.atom_1.0.links-and-content.xml | 71 +++++++++++++++-
 ...azyblorg-all.atom_1.0.links-and-teaser.xml |  4 +-
 .../lazyblorg-all.atom_1.0.links-only.xml     |  4 +-
 .../how-to-use-public-voit/index.html         |  4 +
 .../end_to_end_test/comparison/index.html     |  2 +-
 .../comparison/persistent-entry/index.html    |  6 +-
 .../comparison/tags/exampletag/index.html     |  8 +-
 .../comparison/tags/lazyblorg/index.html      |  4 +-
 .../comparison/tags/mytest/index.html         |  4 +-
 .../comparison/tags/programming/index.html    |  6 +-
 .../comparison/tags/testtag1/index.html       |  2 +
 .../orgfiles/real-world-entries.org           | 70 +++++++++++++++-
 46 files changed, 552 insertions(+), 33 deletions(-)

diff --git a/README.org b/README.org
index 8890b61..5b3c943 100644
--- a/README.org
+++ b/README.org
@@ -296,6 +296,8 @@ efficiently:
      the entry page, navigational pages, and the feeds. This way, you
      can publish pages who can only be access by people knowing its URL.
 
+- Reading time estimations (multi-language) following [[https://github.com/novoid/lazyblorg/issues/47][this feature request]]
+
 ** FAQs
 
 See https://github.com/novoid/lazyblorg/wiki/FAQs
diff --git a/lib/htmlizer.py b/lib/htmlizer.py
index ccf1229..2788c85 100644
--- a/lib/htmlizer.py
+++ b/lib/htmlizer.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8; mode: python; -*-
-# Time-stamp: <2020-10-03 16:27:56 vk>
+# Time-stamp: <2020-10-03 16:45:42 vk>
 
 import config  # lazyblorg-global settings
 import sys
@@ -7,6 +7,7 @@
 import os
 from datetime import datetime
 from time import time, localtime, strftime
+from math import ceil  # for calculating reading time
 import re  # RegEx: for parsing/sanitizing
 import codecs
 from lib.utils import Utils  # for guess_language_from_stopword_percentages()
@@ -313,6 +314,28 @@ def _populate_dict_of_tags_with_ids(self, blog_data):
 
         return dict_of_tags_with_ids
 
+    def _derive_reading_length(self, rawcontent: str) -> int:
+        """
+        Determines the number of minutes reading time from the rawcontent of the article.
+
+        Assumption: people are able to read 250 words per minute.
+
+        See https://github.com/novoid/lazyblorg/issues/47 for the idea and implementation notes.
+        """
+
+        # remove heading title and drawer in order to get body of content:
+        rawcontent_without_header: str = re.sub(r':PROPERTIES:.+?:END:\n', '', rawcontent, flags=re.DOTALL)
+
+        # remove all "words" (according to split()) which contains numbers or other characters that are indicators of non-word elements:
+        raw_words: list = [x for x in rawcontent_without_header.split() if not re.match(r'.*[|0123456789].*', x)]
+        raw_words = [x for x in raw_words if not x.startswith(('#+', '-', ':'))]
+
+        minutes: int = ceil(len(raw_words) / 250)
+
+        if minutes == 0:
+            minutes = 1  # even empty articles should take one minute to watch at
+        return minutes
+
     def _generate_pages_for_tags_persistent_temporal(self, tags):
         """
         Method that creates the pages for tag-pages, persistent pages, and temporal pages.
@@ -348,6 +371,10 @@ def _generate_pages_for_tags_persistent_temporal(self, tags):
 
             entry = self.sanitize_and_htmlize_blog_content(entry)
 
+            # populate reading time indicator:
+            if 'rawcontent' in entry.keys():
+                entry['reading_minutes'] = self._derive_reading_length(entry['rawcontent'])
+
             htmlcontent = None
 
             if entry['category'] == config.TAGS:
@@ -475,6 +502,7 @@ def _generate_tag_page(self, entry):
         htmlcontent += self._replace_general_article_placeholders(
             entry, content)
         htmlcontent = self.sanitize_internal_links(htmlcontent)
+        htmlcontent = self._insert_reading_minutes_if_found(entry, htmlcontent)
 
         return htmlfilename, orgfilename, htmlcontent
 
@@ -1967,6 +1995,53 @@ def _generate_temporal_article(self, entry):
         htmlcontent += self._replace_general_article_placeholders(
             entry, content)
         htmlcontent = self.sanitize_internal_links(htmlcontent)
+        htmlcontent = self._insert_reading_minutes_if_found(entry, htmlcontent)
+
+        return htmlfilename, orgfilename, htmlcontent
+
+    def _insert_reading_minutes_if_found(self, entry, htmlcontent):
+        """
+        Handles the snippet that contains the estimation for the reading minutes.
+        Deletes the snippet of the template if none found.
+        """
+        content = ''
+        if 'reading_minutes' in entry.keys():
+            if '#READING-MINUTES-SECTION#' in htmlcontent:
+                # insert snippet
+                snippetname = 'reading-time-'
+
+                # handle one or many minutes: (I do have different snippets for those cases)
+                if entry['reading_minutes'] == 1:
+                    snippetname += 'one-minute-'
+                else:
+                    snippetname += 'multiple-minutes-'
+
+                # handle different languages:
+                if entry['autotags']['language'] == 'deutsch':
+                    # FIXXME: other languages than german have to be added
+                    # here: (generalize using a configured list of known
+                    # languages?)
+                    snippetname += 'de'
+                else:
+                    snippetname += 'en'
+
+                # insert snippet:
+                content = htmlcontent.replace('#READING-MINUTES-SECTION#', self.template_definition_by_name(snippetname))
+                # replace actual minutes (if found):
+                content = self._replace_general_article_placeholders(entry, content)
+                return content
+            else:
+                # remove template snippet because we've got no minutes to insert
+                # NOTE: Should be dead code
+                logging.warning('Entry %s: missing reading minutes, removing snippet' % entry['id'])
+                return htmlcontent.replace('#READING-MINUTES-SECTION#', '')
+        else:
+            # missing reading minutes should only be OK with
+            # auto-generated tag pages. Report error if otherwise:
+            if not entry['id'].startswith(self.ID_PREFIX_FOR_EMPTY_TAG_PAGES):
+                logging.warning('Entry %s: missing reading minutes in "entry[]"' % entry['id'])
+            return htmlcontent
+
 
         return htmlfilename, orgfilename, htmlcontent
 
@@ -2018,6 +2093,7 @@ def _generate_persistent_article(self, entry):
         htmlcontent += self._replace_general_article_placeholders(
             entry, content)
         htmlcontent = self.sanitize_internal_links(htmlcontent)
+        htmlcontent = self._insert_reading_minutes_if_found(entry, htmlcontent)
 
         return htmlfilename, orgfilename, htmlcontent
 
@@ -2158,6 +2234,9 @@ def _replace_general_article_placeholders(self, entry, template):
                 self._generate_tag_page_list(
                     entry['title']))
 
+        if 'reading_minutes' in entry.keys():
+            content = content.replace('#READINGMINUTES#', str(entry['reading_minutes']))
+
         return content
 
     def _generate_top_tag_list(self):
diff --git a/templates/blog-format.org b/templates/blog-format.org
index 3d77b5b..c03a41b 100644
--- a/templates/blog-format.org
+++ b/templates/blog-format.org
@@ -283,6 +283,36 @@ With name/label:
 
 #+END_EXPORT
 
+*** Reading time indicators
+
+#+NAME: reading-time-one-minute-en
+#+BEGIN_HTML
+	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+#+END_HTML
+
+#+NAME: reading-time-one-minute-de
+#+BEGIN_HTML
+	  <aside class="reading-time-section">
+          Lesezeit ist eine Minute
+	  </aside>
+#+END_HTML
+
+#+NAME: reading-time-multiple-minutes-en
+#+BEGIN_HTML
+	  <aside class="reading-time-section">
+          Reading time is #READINGMINUTES# minutes
+	  </aside>
+#+END_HTML
+
+#+NAME: reading-time-multiple-minutes-de
+#+BEGIN_HTML
+	  <aside class="reading-time-section">
+          Lesezeit ist #READINGMINUTES# Minuten
+	  </aside>
+#+END_HTML
+
 *** ignore me
 
 #+NAME:
@@ -542,6 +572,8 @@ With name/label:
 
 	  <h1 class="common-article-header-title">#ARTICLE-TITLE#</h1>
 
+    #READING-MINUTES-SECTION#
+
 	</header>
 
     #COMMON-SIDEBAR#
@@ -730,6 +762,8 @@ With name/label:
 
 	  <h1 class="common-article-header-title">#ARTICLE-TITLE#</h1>
 
+  #READING-MINUTES-SECTION#
+
 	</header>
 
   #COMMON-SIDEBAR#
@@ -1029,6 +1063,8 @@ Pages that describe a tag. Corresponding Org-mode entries must have:
 
 	  <h1 class="common-article-header-title">Tag Page for the Tag "#ARTICLE-TITLE#"</h1>
 
+    #READING-MINUTES-SECTION#
+
 	</header>
 
   #COMMON-SIDEBAR#
diff --git a/templates/public_voit.css b/templates/public_voit.css
index 6e7d30b..405e91a 100644
--- a/templates/public_voit.css
+++ b/templates/public_voit.css
@@ -39,7 +39,7 @@ a {
     padding-left: 1em;
     padding-right: 1em; }
 
-  .middle_section_wide, header, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
+  .middle_section_wide, header, .reading-time-section, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
     margin-left: auto;
     margin-right: auto;
     max-width: 45em; }
@@ -103,7 +103,7 @@ a {
     padding-left: 1em;
     padding-right: 1em; }
 
-  .middle_section_wide, header, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
+  .middle_section_wide, header, .reading-time-section, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
     margin-left: auto;
     margin-right: auto;
     max-width: 45em; }
@@ -139,7 +139,7 @@ a {
     padding-left: 1em;
     padding-right: 1em; }
 
-  .middle_section_wide, header, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
+  .middle_section_wide, header, .reading-time-section, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
     margin-left: auto;
     margin-right: auto;
     max-width: 45em; }
@@ -173,7 +173,7 @@ a {
     margin-right: auto;
     max-width: 40em; }
 
-  .middle_section_wide, header, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
+  .middle_section_wide, header, .reading-time-section, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
     margin-left: auto;
     margin-right: auto;
     max-width: 60em; }
@@ -207,7 +207,7 @@ a {
     margin-right: auto;
     max-width: 40em; }
 
-  .middle_section_wide, header, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
+  .middle_section_wide, header, .reading-time-section, .published-on, footer, .temporal-article-header-nav, .month-overview-header-nav, .entrypage-article-header-nav, .persistent-article-header-nav {
     margin-left: auto;
     margin-right: auto;
     max-width: 60em; }
@@ -452,6 +452,15 @@ figcaption {
   color: #252525;
   font-size: 80%; }
 
+.reading-time-section {
+  font-size: 80%;
+  color: gray;
+  text-align: right;
+  margin-left: auto;
+  margin-right: auto;
+  /* padding-top: 0.2em;*/
+  padding-right: 15em; }
+
 .published-on {
   font-size: 80%;
   color: gray;
diff --git a/templates/public_voit.scss b/templates/public_voit.scss
index 25cf1c9..bdeac46 100644
--- a/templates/public_voit.scss
+++ b/templates/public_voit.scss
@@ -512,6 +512,17 @@ figcaption {
     font-size: 80%;
 }
 
+.reading-time-section {
+    @extend .middle_section_wide;
+    font-size: 80%;
+    color: gray;
+    text-align: right;
+    margin-left: auto;
+    margin-right: auto;
+    /* padding-top: 0.2em;*/
+    padding-right: 15em;
+}
+
 .published-on {
     @extend .middle_section_wide;
     font-size: 80%;
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry1/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry1/index.html
index ba25d7f..c47e8ac 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry1/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry1/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry1</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry10/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry10/index.html
index 61759fd..5ea8141 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry10/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry10/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry10</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry11/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry11/index.html
index 6d9d6fe..8dd69dc 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry11/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry11/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry11</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry12/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry12/index.html
index 90d960d..d4c522a 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry12/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry12/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry12</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry13/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry13/index.html
index fbd7495..e914bcc 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry13/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry13/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry13</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry14/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry14/index.html
index ed54f13..dee5eff 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry14/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry14/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry14</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry2/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry2/index.html
index cf9f6d3..f2e38c8 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry2/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry2/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry2</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry3/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry3/index.html
index f44fbf1..35c98b1 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry3/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry3/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry3</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry4/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry4/index.html
index 22a1884..f8a3fac 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry4/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry4/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry4</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry5/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry5/index.html
index 06435cc..3451b54 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry5/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry5/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry5</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry6/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry6/index.html
index 63ca416..8a680c1 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry6/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry6/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry6</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry7/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry7/index.html
index 839ffee..a271eb0 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry7/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry7/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry7</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry8/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry8/index.html
index 9b7192f..f1fbe8c 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry8/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry8/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry8</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/1985/01/01/old-entry9/index.html b/testdata/end_to_end_test/comparison/1985/01/01/old-entry9/index.html
index b2be926..5d6e6a9 100644
--- a/testdata/end_to_end_test/comparison/1985/01/01/old-entry9/index.html
+++ b/testdata/end_to_end_test/comparison/1985/01/01/old-entry9/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">old blog entry9</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/2013/02/14/lazyblorg-example-entry/index.html b/testdata/end_to_end_test/comparison/2013/02/14/lazyblorg-example-entry/index.html
index 51198e6..1ae35e8 100644
--- a/testdata/end_to_end_test/comparison/2013/02/14/lazyblorg-example-entry/index.html
+++ b/testdata/end_to_end_test/comparison/2013/02/14/lazyblorg-example-entry/index.html
@@ -61,6 +61,10 @@
 
 	  <h1 class="common-article-header-title">This is an example blog entry</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/2013/08/22/testid/index.html b/testdata/end_to_end_test/comparison/2013/08/22/testid/index.html
index 4dee982..ece5085 100644
--- a/testdata/end_to_end_test/comparison/2013/08/22/testid/index.html
+++ b/testdata/end_to_end_test/comparison/2013/08/22/testid/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">Mini blog entry</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/2014/01/30/full-syntax-test/index.html b/testdata/end_to_end_test/comparison/2014/01/30/full-syntax-test/index.html
index fa83923..c9e8be8 100644
--- a/testdata/end_to_end_test/comparison/2014/01/30/full-syntax-test/index.html
+++ b/testdata/end_to_end_test/comparison/2014/01/30/full-syntax-test/index.html
@@ -63,6 +63,10 @@
 
 	  <h1 class="common-article-header-title">lazyblorg: Syntax-tests of the Currently Supported Org mode Syntax Elements from the Parser and HTMLizer</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is 9 minutes
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/2016/09/18/from-nothing-to-done/index.html b/testdata/end_to_end_test/comparison/2016/09/18/from-nothing-to-done/index.html
index 19f569b..9dc8e5b 100644
--- a/testdata/end_to_end_test/comparison/2016/09/18/from-nothing-to-done/index.html
+++ b/testdata/end_to_end_test/comparison/2016/09/18/from-nothing-to-done/index.html
@@ -60,6 +60,10 @@
 
 	  <h1 class="common-article-header-title">from nothing to DONE</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/2016/10/31/an-hidden-blog-entry/index.html b/testdata/end_to_end_test/comparison/2016/10/31/an-hidden-blog-entry/index.html
index 6e5bdbc..6642abc 100644
--- a/testdata/end_to_end_test/comparison/2016/10/31/an-hidden-blog-entry/index.html
+++ b/testdata/end_to_end_test/comparison/2016/10/31/an-hidden-blog-entry/index.html
@@ -61,6 +61,10 @@
 
 	  <h1 class="common-article-header-title">This Is An Hidden Article</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
@@ -122,7 +126,7 @@ <h1 class="common-article-header-title">This Is An Hidden Article</h1>
 <div class="back-references"><hr /><p>Related articles that link to this one:</p>
   <ul>
     <li><a href="//Karl-Voit.at/2016/10/31/my-temporal-article">A Temporal Article With Links</a></li>
-    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
   </ul>
 </div>
 	  <aside class="published-on">
diff --git a/testdata/end_to_end_test/comparison/2016/10/31/my-temporal-article/index.html b/testdata/end_to_end_test/comparison/2016/10/31/my-temporal-article/index.html
index b80054a..4ea4154 100644
--- a/testdata/end_to_end_test/comparison/2016/10/31/my-temporal-article/index.html
+++ b/testdata/end_to_end_test/comparison/2016/10/31/my-temporal-article/index.html
@@ -60,6 +60,10 @@
 
 	  <h1 class="common-article-header-title">A Temporal Article With Links</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
@@ -133,7 +137,7 @@ <h1 class="common-article-header-title">A Temporal Article With Links</h1>
 <div class="back-references"><hr /><p>Related articles that link to this one:</p>
   <ul>
     <li><a href="//Karl-Voit.at/2016/10/31/an-hidden-blog-entry">This Is An Hidden Article</a></li>
-    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
   </ul>
 </div>
 	  <aside class="published-on">
diff --git a/testdata/end_to_end_test/comparison/2016/11/06/sanitization-examples/index.html b/testdata/end_to_end_test/comparison/2016/11/06/sanitization-examples/index.html
index e3d23b4..fd3d94f 100644
--- a/testdata/end_to_end_test/comparison/2016/11/06/sanitization-examples/index.html
+++ b/testdata/end_to_end_test/comparison/2016/11/06/sanitization-examples/index.html
@@ -60,6 +60,10 @@
 
 	  <h1 class="common-article-header-title">Testing Misc Sanitization Issues</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/2016/11/16/empty-language-autotag-page/index.html b/testdata/end_to_end_test/comparison/2016/11/16/empty-language-autotag-page/index.html
index fc7b0dc..ea181a5 100644
--- a/testdata/end_to_end_test/comparison/2016/11/16/empty-language-autotag-page/index.html
+++ b/testdata/end_to_end_test/comparison/2016/11/16/empty-language-autotag-page/index.html
@@ -60,6 +60,10 @@
 
 	  <h1 class="common-article-header-title">Empty Autotag Page</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/2016/11/27/image-test/index.html b/testdata/end_to_end_test/comparison/2016/11/27/image-test/index.html
index 3fee8ea..a6a28a4 100644
--- a/testdata/end_to_end_test/comparison/2016/11/27/image-test/index.html
+++ b/testdata/end_to_end_test/comparison/2016/11/27/image-test/index.html
@@ -60,6 +60,10 @@
 
 	  <h1 class="common-article-header-title">Image Test and Language Tag Override</h1>
 
+  	  <aside class="reading-time-section">
+          Lesezeit ist eine Minute
+	  </aside>
+
 	</header>
 
   
@@ -174,7 +178,7 @@ <h1 class="common-article-header-title">Image Test and Language Tag Override</h1
 
 <figure class="image-right">
 <a href="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20560.jpg"><img src="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20300.jpg" alt="This is my alt text" width="300" /></a>
-<figcaption>This is my caption</figcaption>
+<figcaption>This is my caption <a class="figcaption-clue-link" href="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20560.jpg">(klicken für größere Version)</a></figcaption>
 </figure>
 
 <p>
@@ -185,7 +189,7 @@ <h1 class="common-article-header-title">Image Test and Language Tag Override</h1
 
 <figure class="image-right">
 <a href="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20560.jpg"><img src="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20300.jpg" alt="This is my alt text" width="300" /></a>
-<figcaption>This is my caption</figcaption>
+<figcaption>This is my caption <a class="figcaption-clue-link" href="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20560.jpg">(klicken für größere Version)</a></figcaption>
 </figure>
 
 <p>
diff --git a/testdata/end_to_end_test/comparison/2016/11/27/special-characters/index.html b/testdata/end_to_end_test/comparison/2016/11/27/special-characters/index.html
index d25ee7a..cfcb620 100644
--- a/testdata/end_to_end_test/comparison/2016/11/27/special-characters/index.html
+++ b/testdata/end_to_end_test/comparison/2016/11/27/special-characters/index.html
@@ -60,6 +60,10 @@
 
 	  <h1 class="common-article-header-title">Special Characters and Language Tag Override</h1>
 
+  	  <aside class="reading-time-section">
+          Lesezeit ist eine Minute
+	  </aside>
+
 	</header>
 
   
@@ -114,7 +118,7 @@ <h1 class="common-article-header-title">Special Characters and Language Tag Over
 
 <div class="back-references"><hr /><p>Ähnliche Beiträge, die hierher zeigen:</p>
   <ul>
-    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
   </ul>
 </div>
 	  <aside class="published-on">
diff --git a/testdata/end_to_end_test/comparison/2017/01/08/sanitizing-tests/index.html b/testdata/end_to_end_test/comparison/2017/01/08/sanitizing-tests/index.html
index fc49486..f95ba22 100644
--- a/testdata/end_to_end_test/comparison/2017/01/08/sanitizing-tests/index.html
+++ b/testdata/end_to_end_test/comparison/2017/01/08/sanitizing-tests/index.html
@@ -60,6 +60,10 @@
 
 	  <h1 class="common-article-header-title">Sanitizing Elements</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/2017/09/30/link-test/index.html b/testdata/end_to_end_test/comparison/2017/09/30/link-test/index.html
index 8d89ae5..cdd885c 100644
--- a/testdata/end_to_end_test/comparison/2017/09/30/link-test/index.html
+++ b/testdata/end_to_end_test/comparison/2017/09/30/link-test/index.html
@@ -5,19 +5,19 @@
 
   <meta name="author" content="Karl Voit" />
   <meta name="generator" content="lazyblorg" />
-  <meta name="description" content="Links test" />
+  <meta name="description" content="Links test and reading time over one minute" />
   <meta name="orgmode-id" content="2017-09-30-link-test" />
 
   <meta name="twitter:card" content="summary" />
   <meta name="twitter:site" content="@n0v0id" />
   <meta name="twitter:creator" content="@n0v0id" />
   <meta name="twitter:title" content="public voit" />
-  <meta name="twitter:description" content="Links test" />
+  <meta name="twitter:description" content="Links test and reading time over one minute" />
   <meta name="twitter:image" content="http://Karl-Voit.at/images/public-voit_T_logo_200x200.png" />
 
   <meta property="og:type" content="article" />
   <meta property="og:title" content="public voit" />
-  <meta property="og:description" content="Links test" />
+  <meta property="og:description" content="Links test and reading time over one minute" />
   <meta property="og:image" content="http://Karl-Voit.at/images/public-voit_T_logo_200x200.png" />
   <meta property="og:site_name" content="public voit - Web-page of Karl Voit">
   <meta property="article:published_time" content="2017-09-30T17:05+01:00" />
@@ -36,7 +36,7 @@
   <!-- WARNING: This page is written in HTML5 and might not be displayed correctly in old browsers. -->
 
       <!-- link rel="stylesheet" type="text/css" href="../../../../style.css" / -->
-      <title>Links test</title>
+      <title>Links test and reading time over one minute</title>
 
   </head>  <body>
 
@@ -61,7 +61,11 @@
 	    </ul>
 	  </aside>
 
-	  <h1 class="common-article-header-title">Links test</h1>
+	  <h1 class="common-article-header-title">Links test and reading time over one minute</h1>
+
+  	  <aside class="reading-time-section">
+          Reading time is 3 minutes
+	  </aside>
 
 	</header>
 
@@ -138,6 +142,58 @@ <h1 class="common-article-header-title">Links test</h1>
 
 What about <a href="//Karl-Voit.at/2016/10/31/an-hidden-blog-entry">a hidden entry</a>?
 
+</p>
+
+	  <header><h2 class="section-title">Some test to get the reading time to exceed one minute</h2></header>
+
+<p>
+
+The <a href="https://github.com/novoid/lazyblorg/issues/47">reading time estimation feature</a> is a very nice touch for the reader in order to get a rough figure how many minutes it takes to read an article.
+
+</p>
+
+<p>
+
+This way, she is able to determine if it is worth the time or not. Having such an indicator is almost standard in nowaday's web culture.
+
+</p>
+
+<p>
+
+My assumption is, that the reader is able to read a certain amount of words per minute. The initial value was chosen with 250. So maybe this is not adequate - let's see. Furthermore, I had to derive a heuristic algorithm to filter out non-word noise of the original Org mode source file. Those filtered things might contain real word (false positives) and the rest could contain non-words (false negatives). On average, this should not be a big issue. At least, this is a better approximation than counting all characters and assuming an average word consisting of five characters as I've seen in another algorithm. First, I would have had issues with filtering non-word content. Secondly, different languages do have different average sizes of words. So let's hope this is a valueable contribution to lazyblorg.
+
+</p>
+<div class="orgmode-hr" ></div>
+<p>
+
+In order to get the reading length high, here is some further dummy text as well:
+
+</p>
+
+<p>
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis. Proin neque massa, cursus ut, gravida ut, lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus. Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim. Phasellus neque orci, porta a, aliquet quis, semper a, massa. Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod tellus id erat.
+
+</p>
+
+<p>
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis. Proin neque massa, cursus ut, gravida ut, lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus. Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim. Phasellus neque orci, porta a, aliquet quis, semper a, massa. Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod tellus id erat.
+
+</p>
+
+<p>
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis. Proin neque massa, cursus ut, gravida ut, lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus. Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim. Phasellus neque orci, porta a, aliquet quis, semper a, massa. Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod tellus id erat.
+
+</p>
+
+	  <header><h2 class="section-title">An almost empty heading at the end</h2></header>
+
+<p>
+
+This is to test the reading length estimation algorithm with a property drawer at the end.
+
 </p>
 
 
@@ -145,7 +201,7 @@ <h1 class="common-article-header-title">Links test</h1>
 
 <div class="back-references"><hr /><p>Related articles that link to this one:</p>
   <ul>
-    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
   </ul>
 </div>
 	  <aside class="published-on">
diff --git a/testdata/end_to_end_test/comparison/2017/09/30/link-test/source.org.txt b/testdata/end_to_end_test/comparison/2017/09/30/link-test/source.org.txt
index 51c9052..a00998a 100644
--- a/testdata/end_to_end_test/comparison/2017/09/30/link-test/source.org.txt
+++ b/testdata/end_to_end_test/comparison/2017/09/30/link-test/source.org.txt
@@ -22,6 +22,71 @@ Here [[id:2016-10-31-a-tag-page][in a quote]] block.
 Here is [[id:2017-09-30-link-test][a self-reference]] which should not result in a backlink to itself.
 
 *** Even [[id:2016-10-31-my-temporal-article][a heading should]] work
+:PROPERTIES:
+:END:
 
 What about [[id:2016-10-31-an-hidden-blog-entry][a hidden entry]]?
 
+*** Some test to get the reading time to exceed one minute
+:PROPERTIES:
+:END:
+
+The [[https://github.com/novoid/lazyblorg/issues/47][reading time estimation feature]] is a very nice touch for the
+reader in order to get a rough figure how many minutes it takes to
+read an article.
+
+This way, she is able to determine if it is worth the time or not.
+Having such an indicator is almost standard in nowaday's web culture.
+
+My assumption is, that the reader is able to read a certain amount of
+words per minute. The initial value was chosen with 250. So maybe this
+is not adequate - let's see. Furthermore, I had to derive a heuristic
+algorithm to filter out non-word noise of the original Org mode source
+file. Those filtered things might contain real word (false positives)
+and the rest could contain non-words (false negatives). On average,
+this should not be a big issue. At least, this is a better
+approximation than counting all characters and assuming an average
+word consisting of five characters as I've seen in another algorithm.
+First, I would have had issues with filtering non-word content.
+Secondly, different languages do have different average sizes of
+words. So let's hope this is a valueable contribution to lazyblorg.
+
+------------
+
+In order to get the reading length high, here is some further dummy
+text as well:
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non
+orci commodo lobortis. Proin neque massa, cursus ut, gravida ut,
+lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus.
+Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at
+pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim.
+Phasellus neque orci, porta a, aliquet quis, semper a, massa.
+Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod
+tellus id erat.
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non
+orci commodo lobortis. Proin neque massa, cursus ut, gravida ut,
+lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus.
+Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at
+pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim.
+Phasellus neque orci, porta a, aliquet quis, semper a, massa.
+Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod
+tellus id erat.
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non
+orci commodo lobortis. Proin neque massa, cursus ut, gravida ut,
+lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus.
+Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at
+pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim.
+Phasellus neque orci, porta a, aliquet quis, semper a, massa.
+Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod
+tellus id erat.
+
+*** An almost empty heading at the end
+:PROPERTIES:
+:END:
+
+This is to test the reading length estimation algorithm with a
+property drawer at the end.
+
diff --git a/testdata/end_to_end_test/comparison/2020/10/02/Heading-which-starts-with-a-list/index.html b/testdata/end_to_end_test/comparison/2020/10/02/Heading-which-starts-with-a-list/index.html
index 275dfca..9b610a4 100644
--- a/testdata/end_to_end_test/comparison/2020/10/02/Heading-which-starts-with-a-list/index.html
+++ b/testdata/end_to_end_test/comparison/2020/10/02/Heading-which-starts-with-a-list/index.html
@@ -59,6 +59,10 @@
 
 	  <h1 class="common-article-header-title">Heading which starts with a list</h1>
 
+  	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/comparison/about/index.html b/testdata/end_to_end_test/comparison/about/index.html
index 19eb5e3..f085f44 100644
--- a/testdata/end_to_end_test/comparison/about/index.html
+++ b/testdata/end_to_end_test/comparison/about/index.html
@@ -40,6 +40,10 @@
 
 	  <h1 class="common-article-header-title">Placeholder: About</h1>
 
+    	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
     
diff --git a/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-and-content.xml b/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-and-content.xml
index 1c078fd..9ea386a 100644
--- a/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-and-content.xml
+++ b/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-and-content.xml
@@ -7,7 +7,7 @@
   <id>http://Karl-Voit.at/</id>
   <link href="http://Karl-Voit.at" />
   <icon>/favicon.ico</icon>
-  <updated>2020-10-02T19:29:42+01:00</updated>
+  <updated>2020-10-03T16:36:41+01:00</updated>
   <author>
     <name>Karl Voit</name>
   </author>
@@ -44,7 +44,7 @@
 </entry>
 <!-- ############################################################################################# -->
 <entry>
-    <title type="text">Links test</title>
+    <title type="text">Links test and reading time over one minute</title>
     <link href='http://Karl-Voit.at/2017/09/30/link-test' />
     <published>2017-09-30T17:05:00+01:00</published>
     <updated>2017-09-30T17:05:00+01:00</updated>
@@ -138,6 +138,69 @@ Here is <a href="//Karl-Voit.at/2017/09/30/link-test">a self-reference</a> which
 
 What about <a href="//Karl-Voit.at/2016/10/31/an-hidden-blog-entry">a hidden entry</a>?
 
+</p>
+
+
+	  <header><h2 class="section-title">Some test to get the reading time to exceed one minute</h2></header>
+
+
+<p>
+
+The <a href="https://github.com/novoid/lazyblorg/issues/47">reading time estimation feature</a> is a very nice touch for the reader in order to get a rough figure how many minutes it takes to read an article.
+
+</p>
+
+
+<p>
+
+This way, she is able to determine if it is worth the time or not. Having such an indicator is almost standard in nowaday's web culture.
+
+</p>
+
+
+<p>
+
+My assumption is, that the reader is able to read a certain amount of words per minute. The initial value was chosen with 250. So maybe this is not adequate - let's see. Furthermore, I had to derive a heuristic algorithm to filter out non-word noise of the original Org mode source file. Those filtered things might contain real word (false positives) and the rest could contain non-words (false negatives). On average, this should not be a big issue. At least, this is a better approximation than counting all characters and assuming an average word consisting of five characters as I've seen in another algorithm. First, I would have had issues with filtering non-word content. Secondly, different languages do have different average sizes of words. So let's hope this is a valueable contribution to lazyblorg.
+
+</p>
+
+<div class="orgmode-hr" ></div>
+
+<p>
+
+In order to get the reading length high, here is some further dummy text as well:
+
+</p>
+
+
+<p>
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis. Proin neque massa, cursus ut, gravida ut, lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus. Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim. Phasellus neque orci, porta a, aliquet quis, semper a, massa. Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod tellus id erat.
+
+</p>
+
+
+<p>
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis. Proin neque massa, cursus ut, gravida ut, lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus. Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim. Phasellus neque orci, porta a, aliquet quis, semper a, massa. Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod tellus id erat.
+
+</p>
+
+
+<p>
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non orci commodo lobortis. Proin neque massa, cursus ut, gravida ut, lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus. Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim. Phasellus neque orci, porta a, aliquet quis, semper a, massa. Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod tellus id erat.
+
+</p>
+
+
+	  <header><h2 class="section-title">An almost empty heading at the end</h2></header>
+
+
+<p>
+
+This is to test the reading length estimation algorithm with a property drawer at the end.
+
 </p>
 
       </div>
@@ -414,7 +477,7 @@ With caption, alt, right alined and 300px width, linked-image-width 560:
 
 <figure class="image-right">
 <a href="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20560.jpg"><img src="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20300.jpg" alt="This is my alt text" width="300" /></a>
-<figcaption>This is my caption</figcaption>
+<figcaption>This is my caption <a class="figcaption-clue-link" href="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20560.jpg">(klicken für größere Version)</a></figcaption>
 </figure>
 
 
@@ -427,7 +490,7 @@ With caption, alt, right alined and 300px width, linked-image-width "original":
 
 <figure class="image-right">
 <a href="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20560.jpg"><img src="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20300.jpg" alt="This is my alt text" width="300" /></a>
-<figcaption>This is my caption</figcaption>
+<figcaption>This is my caption <a class="figcaption-clue-link" href="2017-03-11T18.29.21%20Sterne%20im%20Baum%20--%20mytag%20publicvoit%20-%20scaled%20width%20560.jpg">(klicken für größere Version)</a></figcaption>
 </figure>
 
 
diff --git a/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-and-teaser.xml b/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-and-teaser.xml
index 543ec33..cde09ef 100644
--- a/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-and-teaser.xml
+++ b/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-and-teaser.xml
@@ -7,7 +7,7 @@
   <id>http://Karl-Voit.at/</id>
   <link href="http://Karl-Voit.at" />
   <icon>/favicon.ico</icon>
-  <updated>2020-10-02T19:29:42+01:00</updated>
+  <updated>2020-10-03T16:36:41+01:00</updated>
   <author>
     <name>Karl Voit</name>
   </author>
@@ -34,7 +34,7 @@
 </entry>
 <!-- ############################################################################################# -->
 <entry>
-    <title type="text">Links test</title>
+    <title type="text">Links test and reading time over one minute</title>
     <link href='http://Karl-Voit.at/2017/09/30/link-test' />
     <published>2017-09-30T17:05:00+01:00</published>
     <updated>2017-09-30T17:05:00+01:00</updated>
diff --git a/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-only.xml b/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-only.xml
index d8240d2..26902a6 100644
--- a/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-only.xml
+++ b/testdata/end_to_end_test/comparison/feeds/lazyblorg-all.atom_1.0.links-only.xml
@@ -7,7 +7,7 @@
   <id>http://Karl-Voit.at/</id>
   <link href="http://Karl-Voit.at" />
   <icon>/favicon.ico</icon>
-  <updated>2020-10-02T19:29:42+01:00</updated>
+  <updated>2020-10-03T16:36:41+01:00</updated>
   <author>
     <name>Karl Voit</name>
   </author>
@@ -25,7 +25,7 @@
 </entry>
 <!-- ############################################################################################# -->
 <entry>
-    <title type="text">Links test</title>
+    <title type="text">Links test and reading time over one minute</title>
     <link href='http://Karl-Voit.at/2017/09/30/link-test' />
     <published>2017-09-30T17:05:00+01:00</published>
     <updated>2017-09-30T17:05:00+01:00</updated>
diff --git a/testdata/end_to_end_test/comparison/how-to-use-public-voit/index.html b/testdata/end_to_end_test/comparison/how-to-use-public-voit/index.html
index f385b2e..63f4c78 100644
--- a/testdata/end_to_end_test/comparison/how-to-use-public-voit/index.html
+++ b/testdata/end_to_end_test/comparison/how-to-use-public-voit/index.html
@@ -39,6 +39,10 @@
 
 	  <h1 class="common-article-header-title">Placeholder: How to Use This Blog Efficiently</h1>
 
+    	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
     
diff --git a/testdata/end_to_end_test/comparison/index.html b/testdata/end_to_end_test/comparison/index.html
index 2b0ade6..c8c852e 100644
--- a/testdata/end_to_end_test/comparison/index.html
+++ b/testdata/end_to_end_test/comparison/index.html
@@ -139,7 +139,7 @@ <h1><a href="2020/10/02/Heading-which-starts-with-a-list">2020-10-02: Heading wh
 
 	    </ul>
 	  </aside>
-<h1><a href="2017/09/30/link-test">2017-09-30: Links test</a></h1>
+<h1><a href="2017/09/30/link-test">2017-09-30: Links test and reading time over one minute</a></h1>
 
 
 <p>
diff --git a/testdata/end_to_end_test/comparison/persistent-entry/index.html b/testdata/end_to_end_test/comparison/persistent-entry/index.html
index e40b4c6..16f08fc 100644
--- a/testdata/end_to_end_test/comparison/persistent-entry/index.html
+++ b/testdata/end_to_end_test/comparison/persistent-entry/index.html
@@ -42,6 +42,10 @@
 
 	  <h1 class="common-article-header-title">A Wonderful Persistent Blog Entry</h1>
 
+    	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
     
@@ -96,7 +100,7 @@ <h1 class="common-article-header-title">A Wonderful Persistent Blog Entry</h1>
 <div class="back-references"><hr /><p>Related articles that link to this one:</p>
   <ul>
     <li><a href="//Karl-Voit.at/2016/10/31/my-temporal-article">A Temporal Article With Links</a></li>
-    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
   </ul>
 </div>
 	  <aside class="published-on">
diff --git a/testdata/end_to_end_test/comparison/tags/exampletag/index.html b/testdata/end_to_end_test/comparison/tags/exampletag/index.html
index 3c748d9..513271a 100644
--- a/testdata/end_to_end_test/comparison/tags/exampletag/index.html
+++ b/testdata/end_to_end_test/comparison/tags/exampletag/index.html
@@ -58,6 +58,10 @@
 
 	  <h1 class="common-article-header-title">Tag Page for the Tag "exampletag"</h1>
 
+    	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
@@ -146,7 +150,7 @@ <h1 class="common-article-header-title">Tag Page for the Tag "exampletag"</h1>
 <ul class='tag-pages-link-list'>
   <li> <span class='timestamp'>2016-10-31T16:39</span> <a href="//Karl-Voit.at/persistent-entry">A Wonderful Persistent Blog Entry</a></li>
   <li> <span class='timestamp'>2016-10-31T16:40</span> <a href="//Karl-Voit.at/2016/10/31/my-temporal-article">A Temporal Article With Links</a></li>
-  <li> <span class='timestamp'>2017-09-30T17:05</span> <a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+  <li> <span class='timestamp'>2017-09-30T17:05</span> <a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
 </ul>
 
   </p>
@@ -156,7 +160,7 @@ <h1 class="common-article-header-title">Tag Page for the Tag "exampletag"</h1>
 <div class="back-references"><hr /><p>Related articles that link to this one:</p>
   <ul>
     <li><a href="//Karl-Voit.at/2016/10/31/my-temporal-article">A Temporal Article With Links</a></li>
-    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+    <li><a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
   </ul>
 </div>
 	  <aside class="published-on">
diff --git a/testdata/end_to_end_test/comparison/tags/lazyblorg/index.html b/testdata/end_to_end_test/comparison/tags/lazyblorg/index.html
index 81a873c..feb038b 100644
--- a/testdata/end_to_end_test/comparison/tags/lazyblorg/index.html
+++ b/testdata/end_to_end_test/comparison/tags/lazyblorg/index.html
@@ -57,6 +57,8 @@
 
 	  <h1 class="common-article-header-title">Tag Page for the Tag "lazyblorg"</h1>
 
+    #READING-MINUTES-SECTION#
+
 	</header>
 
   
@@ -108,7 +110,7 @@ <h1 class="common-article-header-title">Tag Page for the Tag "lazyblorg"</h1>
   <li> <span class='timestamp'>2016-11-27T15:00</span> <a href="//Karl-Voit.at/2016/11/27/special-characters">Special Characters and Language Tag Override</a></li>
   <li> <span class='timestamp'>2016-11-27T15:01</span> <a href="//Karl-Voit.at/2016/11/27/image-test">Image Test and Language Tag Override</a></li>
   <li> <span class='timestamp'>2017-01-08T10:58</span> <a href="//Karl-Voit.at/2017/01/08/sanitizing-tests">Sanitizing Elements</a></li>
-  <li> <span class='timestamp'>2017-09-30T17:05</span> <a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+  <li> <span class='timestamp'>2017-09-30T17:05</span> <a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
 </ul>
 
   </p>
diff --git a/testdata/end_to_end_test/comparison/tags/mytest/index.html b/testdata/end_to_end_test/comparison/tags/mytest/index.html
index e981540..d92ee56 100644
--- a/testdata/end_to_end_test/comparison/tags/mytest/index.html
+++ b/testdata/end_to_end_test/comparison/tags/mytest/index.html
@@ -57,6 +57,8 @@
 
 	  <h1 class="common-article-header-title">Tag Page for the Tag "mytest"</h1>
 
+    #READING-MINUTES-SECTION#
+
 	</header>
 
   
@@ -104,7 +106,7 @@ <h1 class="common-article-header-title">Tag Page for the Tag "mytest"</h1>
   
 <ul class='tag-pages-link-list'>
   <li> <span class='timestamp'>2013-02-14T19:02</span> <a href="//Karl-Voit.at/2013/02/14/lazyblorg-example-entry">This is an example blog entry</a></li>
-  <li> <span class='timestamp'>2017-09-30T17:05</span> <a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+  <li> <span class='timestamp'>2017-09-30T17:05</span> <a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
 </ul>
 
   </p>
diff --git a/testdata/end_to_end_test/comparison/tags/programming/index.html b/testdata/end_to_end_test/comparison/tags/programming/index.html
index 8ba1676..5372e1d 100644
--- a/testdata/end_to_end_test/comparison/tags/programming/index.html
+++ b/testdata/end_to_end_test/comparison/tags/programming/index.html
@@ -58,6 +58,10 @@
 
 	  <h1 class="common-article-header-title">Tag Page for the Tag "programming"</h1>
 
+    	  <aside class="reading-time-section">
+          Reading time is one minute
+	  </aside>
+
 	</header>
 
   
@@ -125,7 +129,7 @@ <h1 class="common-article-header-title">Tag Page for the Tag "programming"</h1>
   <li> <span class='timestamp'>2013-02-14T19:02</span> <a href="//Karl-Voit.at/2013/02/14/lazyblorg-example-entry">This is an example blog entry</a></li>
   <li> <span class='timestamp'>2016-10-31T16:39</span> <a href="//Karl-Voit.at/persistent-entry">A Wonderful Persistent Blog Entry</a></li>
   <li> <span class='timestamp'>2016-11-06T17:40</span> <a href="//Karl-Voit.at/2016/11/06/sanitization-examples">Testing Misc Sanitization Issues</a></li>
-  <li> <span class='timestamp'>2017-09-30T17:05</span> <a href="//Karl-Voit.at/2017/09/30/link-test">Links test</a></li>
+  <li> <span class='timestamp'>2017-09-30T17:05</span> <a href="//Karl-Voit.at/2017/09/30/link-test">Links test and reading time over one minute</a></li>
 </ul>
 
   </p>
diff --git a/testdata/end_to_end_test/comparison/tags/testtag1/index.html b/testdata/end_to_end_test/comparison/tags/testtag1/index.html
index f62fa78..d3ad78e 100644
--- a/testdata/end_to_end_test/comparison/tags/testtag1/index.html
+++ b/testdata/end_to_end_test/comparison/tags/testtag1/index.html
@@ -57,6 +57,8 @@
 
 	  <h1 class="common-article-header-title">Tag Page for the Tag "testtag1"</h1>
 
+    #READING-MINUTES-SECTION#
+
 	</header>
 
   
diff --git a/testdata/end_to_end_test/orgfiles/real-world-entries.org b/testdata/end_to_end_test/orgfiles/real-world-entries.org
index 60832c8..65ec465 100644
--- a/testdata/end_to_end_test/orgfiles/real-world-entries.org
+++ b/testdata/end_to_end_test/orgfiles/real-world-entries.org
@@ -183,7 +183,7 @@ FIXXME: not tested so far:
 - float number for :width or :linked-image-width
 - zero or negative integers for :width or :linked-image-width
 
-** DONE Links test                                                                  :blog:lazyblorg:programming:exampletag:mytest:
+** DONE Links test and reading time over one minute   :blog:lazyblorg:programming:exampletag:mytest:
 CLOSED: [2017-09-30 Sat 17:05]
 :PROPERTIES:
 :CREATED:  [2017-09-30 Sat 17:05]
@@ -208,9 +208,77 @@ Here [[id:2016-10-31-a-tag-page][in a quote]] block.
 Here is [[id:2017-09-30-link-test][a self-reference]] which should not result in a backlink to itself.
 
 *** Even [[id:2016-10-31-my-temporal-article][a heading should]] work
+:PROPERTIES:
+:CREATED:  [2020-10-03 Sat 15:57]
+:END:
 
 What about [[id:2016-10-31-an-hidden-blog-entry][a hidden entry]]?
 
+*** Some test to get the reading time to exceed one minute
+:PROPERTIES:
+:CREATED:  [2020-10-03 Sat 15:58]
+:END:
+
+The [[https://github.com/novoid/lazyblorg/issues/47][reading time estimation feature]] is a very nice touch for the
+reader in order to get a rough figure how many minutes it takes to
+read an article.
+
+This way, she is able to determine if it is worth the time or not.
+Having such an indicator is almost standard in nowaday's web culture.
+
+My assumption is, that the reader is able to read a certain amount of
+words per minute. The initial value was chosen with 250. So maybe this
+is not adequate - let's see. Furthermore, I had to derive a heuristic
+algorithm to filter out non-word noise of the original Org mode source
+file. Those filtered things might contain real word (false positives)
+and the rest could contain non-words (false negatives). On average,
+this should not be a big issue. At least, this is a better
+approximation than counting all characters and assuming an average
+word consisting of five characters as I've seen in another algorithm.
+First, I would have had issues with filtering non-word content.
+Secondly, different languages do have different average sizes of
+words. So let's hope this is a valueable contribution to lazyblorg.
+
+------------
+
+In order to get the reading length high, here is some further dummy
+text as well:
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non
+orci commodo lobortis. Proin neque massa, cursus ut, gravida ut,
+lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus.
+Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at
+pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim.
+Phasellus neque orci, porta a, aliquet quis, semper a, massa.
+Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod
+tellus id erat.
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non
+orci commodo lobortis. Proin neque massa, cursus ut, gravida ut,
+lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus.
+Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at
+pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim.
+Phasellus neque orci, porta a, aliquet quis, semper a, massa.
+Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod
+tellus id erat.
+
+Aliquam erat volutpat. Nunc eleifend leo vitae magna. In id erat non
+orci commodo lobortis. Proin neque massa, cursus ut, gravida ut,
+lobortis eget, lacus. Sed diam. Praesent fermentum tempor tellus.
+Nullam tempus. Mauris ac felis vel velit tristique imperdiet. Donec at
+pede. Etiam vel neque nec dui dignissim bibendum. Vivamus id enim.
+Phasellus neque orci, porta a, aliquet quis, semper a, massa.
+Phasellus purus. Pellentesque tristique imperdiet tortor. Nam euismod
+tellus id erat.
+
+*** An almost empty heading at the end
+:PROPERTIES:
+:CREATED:  [2020-10-03 Sat 16:05]
+:END:
+
+This is to test the reading length estimation algorithm with a
+property drawer at the end.
+
 * DONE A Temporal Article With Links                                               :exampletag::blog:
 CLOSED: [2016-10-31 Mon 16:40]
 :PROPERTIES: