# BashBlog, a simple blog system written in a single bash script

#!/usr/bin/env bash

# BashBlog, a simple blog system written in a single bash script
# (C) Carlos Fenollosa <[email protected]>, 2011-2016 and contributors
# https://github.com/carlesfe/bashblog/contributors
# Check out README.md for more details

# Global variables
# It is recommended to perform a 'rebuild' after changing any of this in the code

# Config file. Any settings "key=value" written there will override the
# global_variables defaults. Useful to avoid editing bb.sh and having to deal
# with merges in VCS
global_config=".config"

# This function will load all the variables defined here. They might be overridden
# by the 'global_config' file contents
global_variables() {
global_software_name="BashBlog"
global_software_version="2.8"

# Blog title
global_title="LostCat"
# The typical subtitle for each blog
global_description="<b>La curiosidad me mató</b>"
# The public base URL for this blog
global_url="https://tilde.team/~lostcat/blog"

# Your name
global_author="LostCat"
# You can use twitter or facebook or anything for global_author_url
global_author_url="https://tilde.team/~lostcat"
# Your email
global_email="[email protected]"

# CC by-nc-nd is a good starting point, you can change this to "©" for Copyright
global_license="CC by-nc-sa"

# If you have a Google Analytics ID (UA-XXXXX) and wish to use the standard
# embedding code, put it on global_analytics
# If you have custom analytics code (i.e. non-google) or want to use the Universal
# code, leave global_analytics empty and specify a global_analytics_file
global_analytics=""
global_analytics_file=""

# Leave this empty (i.e. "") if you don't want to use feedburner,
# or change it to your own URL
global_feedburner=""

# Change this to your username if you want to use twitter for comments
global_twitter_username=""
# Set this to false for a Twitter button with share count. The cookieless version
# is just a link.
global_twitter_cookieless="true"
# Default search page, where tweets more than a week old are hidden
global_twitter_search="twitter"

# Change this to your disqus username to use disqus for comments
global_disqus_username=""

# Blog generated files
# index page of blog (it is usually good to use "index.html" here)
index_file="index.html"
number_of_index_articles="8"
# global archive
archive_index="all_posts.html"
tags_index="all_tags.html"

# Non blogpost files. Bashblog will ignore these. Useful for static pages and custom content
# Add them as a bash array, e.g. non_blogpost_files=("news.html" "test.html")
non_blogpost_files=()

# feed file (rss in this case)
blog_feed="feed.rss"
number_of_feed_articles="10"
# "cut" blog entry when putting it to index page. Leave blank for full articles in front page
# i.e. include only up to first '<hr>', or '----' in markdown
cut_do="cut"
# When cutting, cut also tags? If "no", tags will appear in index page for cut articles
cut_tags="yes"
# Regexp matching the HTML line where to do the cut
# note that slash is regexp separator so you need to prepend it with backslash
cut_line='<hr ?\/?>'
# save markdown file when posting with "bb post -m". Leave blank to discard it.
save_markdown="yes"
# prefix for tags/categories files
# please make sure that no other html file starts with this prefix
prefix_tags="tag_"
# personalized header and footer (only if you know what you're doing)
# DO NOT name them .header.html, .footer.html or they will be overwritten
# leave blank to generate them, recommended
header_file=""
footer_file=""
# extra content to add just after we open the <body> tag
# and before the actual blog content
body_begin_file=""
# extra content to add just before we cloese <body tag (just before
# </body>)
body_end_file=""
# CSS files to include on every page, f.ex. css_include=('main.css' 'blog.css')
# leave empty to use generated
css_include=()
# HTML files to exclude from index, f.ex. post_exclude=('imprint.html 'aboutme.html')
html_exclude=()

# Localization and i18n
# "Comments?" (used in twitter link after every post)
template_comments="Comments?"
# "Read more..." (link under cut article on index page)
template_read_more="Read more..."
# "View more posts" (used on bottom of index page as link to archive)
template_archive="All posts"
# "All posts" (title of archive page)
template_archive_title="All posts"
# "All tags"
template_tags_title="All tags"
# "posts" (on "All tags" page, text at the end of each tag line, like "2. Music - 15 posts")
template_tags_posts="posts"
template_tags_posts_2_4="posts" # Some slavic languages use a different plural form for 2-4 items
template_tags_posts_singular="post"
# "Posts tagged" (text on a title of a page with index of one tag, like "My Blog - Posts tagged "Music"")
template_tag_title="Posts tagged"
# "Tags:" (beginning of line in HTML file with list of all tags for this article)
template_tags_line_header="Tags:"
# "Back to the index page" (used on archive page, it is link to blog index)
template_archive_index_page="Back to the index page"
# "Subscribe" (used on bottom of index page, it is link to RSS feed)
template_subscribe="Subscribe"
# "Subscribe to this page..." (used as text for browser feed button that is embedded to html)
template_subscribe_browser_button="Subscribe to this page..."
# "Tweet" (used as twitter text button for posting to twitter)
template_twitter_button="Tweet"
template_twitter_comment="<Type your comment here but please leave the URL so that other people can follow the comments>"

# The locale to use for the dates displayed on screen
date_format="%d/%B/%Y"
date_locale="C"
date_inpost="bashblog_timestamp"
# Don't change these dates
date_format_full="%a, %d %b %Y %H:%M:%S %z"
date_format_timestamp="%Y%m%d%H%M.%S"
date_allposts_header="%B %Y"

# Perform the post title -> filename conversion
# Experts only. You may need to tune the locales too
# Leave empty for no conversion, which is not recommended
# This default filter respects backwards compatibility
convert_filename="iconv -f utf-8 -t ascii//translit | sed 's/^-*//' | tr [:upper:] [:lower:] | tr ' ' '-' | tr -dc '[:alnum:]-'"

# URL where you can view the post while it's being edited
# same as global_url by default
# You can change it to path on your computer, if you write posts locally
# before copying them to the server
preview_url=""

# Markdown location. Trying to autodetect by default.
# The invocation must support the signature 'markdown_bin in.md > out.html'
[[ -f Markdown.pl ]] && markdown_bin=./Markdown.pl || markdown_bin=$(which Markdown.pl 2>/dev/null || which markdown 2>/dev/null)
}

# Check for the validity of some variables
# DO NOT EDIT THIS FUNCTION unless you know what you're doing
global_variables_check() {
[[ $header_file == .header.html ]] &&
echo "Please check your configuration. '.header.html' is not a valid value for the setting 'header_file'" &&
exit
[[ $footer_file == .footer.html ]] &&
echo "Please check your configuration. '.footer.html' is not a valid value for the setting 'footer_file'" &&
exit
}

# Test if the markdown script is working correctly
test_markdown() {
[[ -n $markdown_bin ]] &&
(
[[ $("$markdown_bin" <<< $'line 1\n\nline 2') == $'<p>line 1</p>\n\n<p>line 2</p>' ]] ||
[[ $("$markdown_bin" <<< $'line 1\n\nline 2') == $'<p>line 1</p>\n<p>line 2</p>' ]]
)
}

# Parse a Markdown file into HTML and return the generated file
markdown() {
out=${1%.md}.html
while [[ -f $out ]]; do out=${out%.html}.$RANDOM.html; done
$markdown_bin "$1" > "$out"
echo "$out"
}

# Prints the required google analytics code
google_analytics() {
[[ -z $global_analytics && -z $global_analytics_file ]] && return

if [[ -z $global_analytics_file ]]; then
echo "<script type=\"text/javascript\">

var _gaq = _gaq || [];
_gaq.push(['_setAccount', '${global_analytics}']);
_gaq.push(['_trackPageview']);

(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();

</script>"
else
cat "$global_analytics_file"
fi
}

# Prints the required code for disqus comments
disqus_body() {
[[ -z $global_disqus_username ]] && return

echo '<div id="disqus_thread"></div>
<script type="text/javascript">
/* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */
var disqus_shortname = '"'$global_disqus_username'"'; // required: replace example with your forum shortname

/* * * DONT EDIT BELOW THIS LINE * * */
(function() {
var dsq = document.createElement("script"); dsq.type = "text/javascript"; dsq.async = true;
dsq.src = "//" + disqus_shortname + ".disqus.com/embed.js";
(document.getElementsByTagName("head")[0] || document.getElementsByTagName("body")[0]).appendChild(dsq);
})();
</script>
<noscript>Please enable JavaScript to view the <a href="http://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>
<a href="http://disqus.com" class="dsq-brlink">comments powered by <span class="logo-disqus">Disqus</span></a>'
}

# Prints the required code for disqus in the footer
disqus_footer() {
[[ -z $global_disqus_username ]] && return
echo '<script type="text/javascript">
/* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */
var disqus_shortname = '"'$global_disqus_username'"'; // required: replace example with your forum shortname

/* * * DONT EDIT BELOW THIS LINE * * */
(function () {
var s = document.createElement("script"); s.async = true;
s.type = "text/javascript";
s.src = "//" + disqus_shortname + ".disqus.com/count.js";
(document.getElementsByTagName("HEAD")[0] || document.getElementsByTagName("BODY")[0]).appendChild(s);
}());
</script>'
}

# Reads HTML file from stdin, prints its content to stdout
# $1 where to start ("text" or "entry")
# $2 where to stop ("text" or "entry")
# $3 "cut" to remove text from <hr /> to 
# note that this does not remove <hr /> line itself,
# so you can see if text was cut or not
get_html_file_content() {
awk "//, //{
if (!// && !//) print
if (\"$3\" == \"cut\" && /$cut_line/){
if (\"$2\" == \"text\") exit # no need to read further
while (getline > 0 && !//) {
if (\"$cut_tags\" == \"no\" && /^<p>$template_tags_line_header/ ) print
}
}
}"
}

# Edit an existing, published .html file while keeping its original timestamp
# Please note that this function does not automatically republish anything, as
# it is usually called from 'main'.
#
# Note that it edits HTML file, even if you wrote the post as markdown originally
# Note that if you edit title then filename might also change
#
# $1 the file to edit
# $2 (optional) edit mode:
# "keep" to keep old filename
# "full" to edit full HTML, and not only text part (keeps old filename)
# leave empty for default behavior (edit only text part and change name)
edit() {
[[ ! -f "${1%%.*}.html" ]] && echo "Can't edit post "${1%%.*}.html", did you mean to use \"bb.sh post <draft_file>\"?" && exit -1
# Original post timestamp
edit_timestamp=$(LC_ALL=C date -r "${1%%.*}.html" +"$date_format_full" )
touch_timestamp=$(LC_ALL=C date -r "${1%%.*}.html" +"$date_format_timestamp")
tags_before=$(tags_in_post "${1%%.*}.html")
if [[ $2 == full ]]; then
$EDITOR "$1"
filename=$1
else
if [[ ${1##*.} == md ]]; then
test_markdown
if (($? != 0)); then
echo "Markdown is not working, please edit HTML file directly."
exit
fi
# editing markdown file
$EDITOR "$1"
TMPFILE=$(markdown "$1")
filename=${1%%.*}.html
else
# Create the content file
TMPFILE=$(basename "$1").$RANDOM.html
# Title
get_post_title "$1" > "$TMPFILE"
# Post text with plaintext tags
get_html_file_content 'text' 'text' <"$1" | sed "/^<p>$template_tags_line_header/s|<a href='$prefix_tags$[^']*$.html'>\\1</a>|\\1|g" >> "$TMPFILE"
$EDITOR "$TMPFILE"
filename=$1
fi
rm "$filename"
if [[ $2 == keep ]]; then
parse_file "$TMPFILE" "$edit_timestamp" "$filename"
else
parse_file "$TMPFILE" "$edit_timestamp" # this command sets $filename as the html processed file
[[ ${1##*.} == md ]] && mv "$1" "${filename%%.*}.md" 2>/dev/null
fi
rm "$TMPFILE"
fi
touch -t "$touch_timestamp" "$filename"
touch -t "$touch_timestamp" "$1"
chmod 644 "$filename"
echo "Posted $filename"
tags_after=$(tags_in_post "$filename")
relevant_tags=$(echo "$tags_before $tags_after" | tr ',' ' ' | tr ' ' '\n' | sort -u | tr '\n' ' ')
if [[ ! -z $relevant_tags ]]; then
relevant_posts="$(posts_with_tags $relevant_tags) $filename"
rebuild_tags "$relevant_posts" "$relevant_tags"
fi
}

# Create a Twitter summary (twitter "card") for the post
#
# $1 the post file
# $2 the title
twitter_card() {
[[ -z $global_twitter_username ]] && return

echo "<meta name='twitter:card' content='summary' />"
echo "<meta name='twitter:site' content='@$global_twitter_username' />"
echo "<meta name='twitter:title' content='$2' />" # Twitter truncates at 70 char
description=$(grep -v "^<p>$template_tags_line_header" "$1" | sed -e 's/<[^>]*>//g' | tr '\n' ' ' | sed "s/\"/'/g" | head -c 250)
echo "<meta name='twitter:description' content=\"$description\" />"
image=$(sed -n '2,$ d; s/.*<img.*src="$[^"]*$".*/\1/p' "$1") # First image is fine
[[ -z $image ]] && return
[[ $image =~ ^https?:// ]] || image=$global_url/$image # Check that URL is absolute
echo "<meta name='twitter:image' content='$image' />"
}

# Adds the code needed by the twitter button
#
# $1 the post URL
twitter() {
[[ -z $global_twitter_username ]] && return

if [[ -z $global_disqus_username ]]; then
if [[ $global_twitter_cookieless == true ]]; then
id=$RANDOM

search_engine="https://twitter.com/search?q="

echo "<p id='twitter'><a href='http://twitter.com/intent/tweet?url=$1&text=$template_twitter_comment&via=$global_twitter_username'>$template_comments $template_twitter_button</a> "
echo "<a href='$search_engine""$1'><span id='count-$id'></span></a> </p>"
return;
else
echo "<p id='twitter'>$template_comments ";
fi
else
echo "<p id='twitter'><a href=\"$1#disqus_thread\">$template_comments</a>  "
fi

echo "<a href=\"https://twitter.com/share\" class=\"twitter-share-button\" data-text=\"$template_twitter_comment\" data-url=\"$1\""
echo " data-via=\"$global_twitter_username\""
echo ">$template_twitter_button</a> <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=\"//platform.twitter.com/widgets.js\";fjs.parentNode.insertBefore(js,fjs);}}(document,\"script\",\"twitter-wjs\");</script>"
echo "</p>"
}

# Check if the file is a 'boilerplate' (i.e. not a post)
# The return values are designed to be used like this inside a loop:
# is_boilerplate_file <file> && continue
#
# $1 the file
#
# Return 0 (bash return value 'true') if the input file is an index, feed, etc
# or 1 (bash return value 'false') if it is a blogpost
is_boilerplate_file() {
name=${1#./}
# First check against user-defined non-blogpost pages
for item in "${non_blogpost_files[@]}"; do
[[ "$name" == "$item" ]] && return 0
done

case $name in
( "$index_file" | "$archive_index" | "$tags_index" | "$footer_file" | "$header_file" | "$global_analytics_file" | "$prefix_tags"* )
return 0 ;;
( * ) # Check for excluded
for excl in "${html_exclude[@]}"; do
[[ $name == "$excl" ]] && return 0
done
return 1 ;;
esac
}

# Adds all the bells and whistles to format the html page
# Every blog post is marked with a  and 
# which is parsed afterwards in the other functions. There is also a marker
#  to determine just the beginning of the text body of the post
#
# $1 a file with the body of the content
# $2 the output file
# $3 "yes" if we want to generate the index.html,
# "no" to insert new blog posts
# $4 title for the html header
# $5 original blog timestamp
# $6 post author
create_html_page() {
content=$1
filename=$2
index=$3
title=$4
timestamp=$5
author=$6

# Create the actual blog post
# html, head
{
cat ".header.html"
echo "<title>$title</title>"
google_analytics
twitter_card "$content" "$title"
echo "</head><body>"
# stuff to add before the actual body content
[[ -n $body_begin_file ]] && cat "$body_begin_file"
# body divs
echo '<div id="divbodyholder">'
echo '<div class="headerholder"><div class="header">'
# blog title
echo '<div id="title">'
cat .title.html
echo '</div></div></div>' # title, header, headerholder
echo '<div id="divbody"><div class="content">'

file_url=${filename#./}
file_url=${file_url%.rebuilt} # Get the correct URL when rebuilding
# one blog entry
if [[ $index == no ]]; then
echo '' # marks the beginning of the whole post
echo "<h3><a class=\"ablack\" href=\"$file_url\">"
# remove possible <p>'s on the title because of markdown conversion
title=${title//<p>/}
title=${title//<\/p>/}
echo "$title"
echo '</a></h3>'
if [[ -z $timestamp ]]; then
echo ""
else
echo ""
fi
if [[ -z $timestamp ]]; then
echo -n "<div class=\"subtitle\">$(LC_ALL=$date_locale date +"$date_format")"
else
echo -n "<div class=\"subtitle\">$(LC_ALL=$date_locale date +"$date_format" --date="$timestamp")"
fi
[[ -n $author ]] && echo -e " — \n$author"
echo "</div>"
echo '' # This marks the text body, after the title, date...
fi
cat "$content" # Actual content
if [[ $index == no ]]; then
echo -e '\n'

twitter "$global_url/$file_url"

echo '' # absolute end of the post
fi

echo '</div>' # content

# Add disqus commments except for index and all_posts pages
[[ $index == no ]] && disqus_body

# page footer
cat .footer.html
# close divs
echo '</div></div>' # divbody and divbodyholder
disqus_footer
[[ -n $body_end_file ]] && cat "$body_end_file"
echo '</body></html>'
} > "$filename"
}

# Parse the plain text file into an html file
#
# $1 source file name
# $2 (optional) timestamp for the file
# $3 (optional) destination file name
# note that although timestamp is optional, something must be provided at its
# place if destination file name is provided, i.e:
# parse_file source.txt "" destination.html
parse_file() {
# Read for the title and check that the filename is ok
title=""
while IFS='' read -r line; do
if [[ -z $title ]]; then
# remove extra <p> and </p> added by markdown
title=$(echo "$line" | sed 's/<\/*p>//g')
if [[ -n $3 ]]; then
filename=$3
else
filename=$title
[[ -n $convert_filename ]] &&
filename=$(echo "$title" | eval "$convert_filename")
[[ -n $filename ]] ||
filename=$RANDOM # don't allow empty filenames

filename=$filename.html

# Check for duplicate file names
while [[ -f $filename ]]; do
filename=${filename%.html}$RANDOM.html
done
fi
content=$filename.tmp
# Parse possible tags
elif [[ $line == "<p>$template_tags_line_header"* ]]; then
tags=$(echo "$line" | cut -d ":" -f 2- | sed -e 's/<\/p>//g' -e 's/^ *//' -e 's/ *$//' -e 's/, /,/g')
IFS=, read -r -a array <<< "$tags"

echo -n "<p>$template_tags_line_header " >> "$content"
for item in "${array[@]}"; do
echo -n "<a href='$prefix_tags$item.html'>$item</a>, "
done | sed 's/, $/<\/p>/g' >> "$content"
else
echo "$line" >> "$content"
fi
done < "$1"

# Create the actual html page
create_html_page "$content" "$filename" no "$title" "$2" "$global_author"
rm "$content"
}

# Manages the creation of the text file and the parsing to html file
# also the drafts
write_entry() {
test_markdown && fmt=md || fmt=html
f=$2
[[ $2 == -html ]] && fmt=html && f=$3

if [[ -n $f ]]; then
TMPFILE=$f
if [[ ! -f $TMPFILE ]]; then
echo "The file doesn't exist"
delete_includes
exit
fi
# guess format from TMPFILE
extension=${TMPFILE##*.}
[[ $extension == md || $extension == html ]] && fmt=$extension
# but let user override it (`bb.sh post -html file.md`)
[[ $2 == -html ]] && fmt=html
# Test if Markdown is working before re-posting a .md file
if [[ $extension == md ]]; then
test_markdown
if (($? != 0)); then
echo "Markdown is not working, please edit HTML file directly."
exit
fi
fi
else
TMPFILE=.entry-$RANDOM.$fmt
echo -e "Title on this line\n" >> "$TMPFILE"

[[ $fmt == html ]] && cat << EOF >> "$TMPFILE"
<p>The rest of the text file is an <b>html</b> blog post. The process will continue as soon
as you exit your editor.</p>

<p>$template_tags_line_header keep-this-tag-format, tags-are-optional, example</p>
EOF
[[ $fmt == md ]] && cat << EOF >> "$TMPFILE"
The rest of the text file is a **Markdown** blog post. The process will continue
as soon as you exit your editor.

$template_tags_line_header keep-this-tag-format, tags-are-optional, beware-with-underscores-in-markdown, example
EOF
fi
chmod 600 "$TMPFILE"

post_status="E"
filename=""
while [[ $post_status != "p" && $post_status != "P" ]]; do
[[ -n $filename ]] && rm "$filename" # Delete the generated html file, if any
$EDITOR "$TMPFILE"
if [[ $fmt == md ]]; then
html_from_md=$(markdown "$TMPFILE")
parse_file "$html_from_md"
rm "$html_from_md"
else
parse_file "$TMPFILE" # this command sets $filename as the html processed file
fi

chmod 644 "$filename"
[[ -n $preview_url ]] || preview_url=$global_url
echo "To preview the entry, open $preview_url/$filename in your browser"

echo -n "[P]ost this entry, [E]dit again, [D]raft for later? (p/E/d) "
read -r post_status
if [[ $post_status == d || $post_status == D ]]; then
mkdir -p "drafts/"
chmod 700 "drafts/"

title=$(head -n 1 $TMPFILE)
[[ -n $convert_filename ]] && title=$(echo "$title" | eval "$convert_filename")
[[ -n $title ]] || title=$RANDOM

draft=drafts/$title.$fmt
mv "$TMPFILE" "$draft"
chmod 600 "$draft"
rm "$filename"
delete_includes
echo "Saved your draft as '$draft'"
exit
fi
done

if [[ $fmt == md && -n $save_markdown ]]; then
mv "$TMPFILE" "${filename%%.*}.md"
else
rm "$TMPFILE"
fi
chmod 644 "$filename"
echo "Posted $filename"
relevant_tags=$(tags_in_post $filename)
if [[ -n $relevant_tags ]]; then
relevant_posts="$(posts_with_tags $relevant_tags) $filename"
rebuild_tags "$relevant_posts" "$relevant_tags"
fi
}

# Create an index page with all the posts
all_posts() {
echo -n "Creating an index page with all the posts "
contentfile=$archive_index.$RANDOM
while [[ -f $contentfile ]]; do
contentfile=$archive_index.$RANDOM
done

{
echo "<h3>$template_archive_title</h3>"
prev_month=""
while IFS='' read -r i; do
is_boilerplate_file "$i" && continue
echo -n "." 1>&3
# Month headers
month=$(LC_ALL=$date_locale date -r "$i" +"$date_allposts_header")
if [[ $month != "$prev_month" ]]; then
[[ -n $prev_month ]] && echo "</ul>" # Don't close ul before first header
echo "<h4 class='allposts_header'>$month</h4>"
echo "<ul>"
prev_month=$month
fi
# Title
title=$(get_post_title "$i")
echo -n "<li><a href=\"$i\">$title</a> —"
# Date
date=$(LC_ALL=$date_locale date -r "$i" +"$date_format")
echo " $date</li>"
done < <(ls -t ./*.html)
echo "" 1>&3
echo "</ul>"
echo "<div id=\"all_posts\"><a href=\"./$index_file\">$template_archive_index_page</a></div>"
} 3>&1 >"$contentfile"

create_html_page "$contentfile" "$archive_index.tmp" yes "$global_title — $template_archive_title" "$global_author"
mv "$archive_index.tmp" "$archive_index"
chmod 644 "$archive_index"
rm "$contentfile"
}

# Create an index page with all the tags
all_tags() {
echo -n "Creating an index page with all the tags "
contentfile=$tags_index.$RANDOM
while [[ -f $contentfile ]]; do
contentfile=$tags_index.$RANDOM
done

{
echo "<h3>$template_tags_title</h3>"
echo "<ul>"
for i in $prefix_tags*.html; do
[[ -f "$i" ]] || break
echo -n "." 1>&3
nposts=$(grep -c "<\!-- text begin -->" "$i")
tagname=${i#"$prefix_tags"}
tagname=${tagname%.html}
case $nposts in
1) word=$template_tags_posts_singular;;
2|3|4) word=$template_tags_posts_2_4;;
*) word=$template_tags_posts;;
esac
echo "<li><a href=\"$i\">$tagname</a> — $nposts $word</li>"
done
echo "" 1>&3
echo "</ul>"
echo "<div id=\"all_posts\"><a href=\"./$index_file\">$template_archive_index_page</a></div>"
} 3>&1 > "$contentfile"

create_html_page "$contentfile" "$tags_index.tmp" yes "$global_title — $template_tags_title" "$global_author"
mv "$tags_index.tmp" "$tags_index"
chmod 644 "$tags_index"
rm "$contentfile"
}

# Generate the index.html with the content of the latest posts
rebuild_index() {
echo -n "Rebuilding the index "
newindexfile=$index_file.$RANDOM
contentfile=$newindexfile.content
while [[ -f $newindexfile ]]; do
newindexfile=$index_file.$RANDOM
contentfile=$newindexfile.content
done

# Create the content file
{
n=0
while IFS='' read -r i; do
is_boilerplate_file "$i" && continue;
if ((n >= number_of_index_articles)); then break; fi
if [[ -n $cut_do ]]; then
get_html_file_content 'entry' 'entry' 'cut' <"$i" | awk "/$cut_line/ { print \"<p class=\\\"readmore\\\"><a href=\\\"$i\\\">$template_read_more</a></p>\" ; next } 1"
else
get_html_file_content 'entry' 'entry' <"$i"
fi
echo -n "." 1>&3
n=$(( n + 1 ))
done < <(ls -t ./*.html) # sort by date, newest first

feed=$blog_feed
if [[ -n $global_feedburner ]]; then feed=$global_feedburner; fi
} 3>&1 >"$contentfile"

echo ""

create_html_page "$contentfile" "$newindexfile" yes "$global_title" "$global_author"
rm "$contentfile"
mv "$newindexfile" "$index_file"
chmod 644 "$index_file"
}

# Finds all tags referenced in one post.
# Accepts either filename as first argument, or post content at stdin
# Prints one line with space-separated tags to stdout
tags_in_post() {
sed -n "/^<p>$template_tags_line_header/{s/^<p>$template_tags_line_header//;s/<[^>]*>//g;s/[ ,]\+/ /g;p;}" "$1" | tr ', ' ' '
}

# Finds all posts referenced in a number of tags.
# Arguments are tags
# Prints one line with space-separated tags to stdout
posts_with_tags() {
(($# < 1)) && return
set -- "${@/#/$prefix_tags}"
set -- "${@/%/.html}"
sed -n '/^<h3><a class="ablack" href="[^"]*">/{s/.*href="$[^"]*$">.*/\1/;p;}' "$@" 2> /dev/null
}

# Rebuilds tag_*.html files
# if no arguments given, rebuilds all of them
# if arguments given, they should have this format:
# "FILE1 [FILE2 [...]]" "TAG1 [TAG2 [...]]"
# where FILEn are files with posts which should be used for rebuilding tags,
# and TAGn are names of tags which should be rebuilt.
# example:
# rebuild_tags "one_post.html another_article.html" "example-tag another-tag"
# mind the quotes!
rebuild_tags() {
if (($# < 2)); then
# will process all files and tags
files=$(ls -t ./*.html)
all_tags=yes
else
# will process only given files and tags
files=$(printf '%s\n' $1 | sort -u)
files=$(ls -t $files)
tags=$2
fi
echo -n "Rebuilding tag pages "
n=0
if [[ -n $all_tags ]]; then
rm ./"$prefix_tags"*.html &> /dev/null
else
for i in $tags; do
rm "./$prefix_tags$i.html" &> /dev/null
done
fi
# First we will process all files and create temporal tag files
# with just the content of the posts
tmpfile=tmp.$RANDOM
while [[ -f $tmpfile ]]; do tmpfile=tmp.$RANDOM; done
while IFS='' read -r i; do
is_boilerplate_file "$i" && continue;
echo -n "."
if [[ -n $cut_do ]]; then
get_html_file_content 'entry' 'entry' 'cut' <"$i" | awk "/$cut_line/ { print \"<p class=\\\"readmore\\\"><a href=\\\"$i\\\">$template_read_more</a></p>\" ; next } 1"
else
get_html_file_content 'entry' 'entry' <"$i"
fi >"$tmpfile"
for tag in $(tags_in_post "$i"); do
if [[ -n $all_tags || " $tags " == *" $tag "* ]]; then
cat "$tmpfile" >> "$prefix_tags$tag".tmp.html
fi
done
done <<< "$files"
rm "$tmpfile"
# Now generate the tag files with headers, footers, etc
while IFS='' read -r i; do
tagname=${i#./"$prefix_tags"}
tagname=${tagname%.tmp.html}
create_html_page "$i" "$prefix_tags$tagname.html" yes "$global_title — $template_tag_title \"$tagname\"" "$global_author"
rm "$i"
done < <(ls -t ./"$prefix_tags"*.tmp.html 2>/dev/null)
echo
}

# Return the post title
#
# $1 the html file
get_post_title() {
awk '/<h3><a class="ablack" href=".+">/, /<\/a><\/h3>/{if (!/<h3><a class="ablack" href=".+">/ && !/<\/a><\/h3>/) print}' "$1"
}

# Return the post author
#
# $1 the html file
get_post_author() {
awk '/<div class="subtitle">.+/, //{if (!/<div class="subtitle">.+/ && !//) print}' "$1" | sed 's/<\/div>//g'
}

# Displays a list of the tags
#
# $2 if "-n", tags will be sorted by number of posts
list_tags() {
if [[ $2 == -n ]]; then do_sort=1; else do_sort=0; fi

ls ./$prefix_tags*.html &> /dev/null
(($? != 0)) && echo "No posts yet. Use 'bb.sh post' to create one" && return

lines=""
for i in $prefix_tags*.html; do
[[ -f "$i" ]] || break
nposts=$(grep -c "<\!-- text begin -->" "$i")
tagname=${i#"$prefix_tags"}
tagname=${tagname#.html}
((nposts > 1)) && word=$template_tags_posts || word=$template_tags_posts_singular
line="$tagname # $nposts # $word"
lines+=$line\\n
done

if (( do_sort == 1 )); then
echo -e "$lines" | column -t -s "#" | sort -nrk 2
else
echo -e "$lines" | column -t -s "#"
fi
}

# Displays a list of the posts
list_posts() {
ls ./*.html &> /dev/null
(($? != 0)) && echo "No posts yet. Use 'bb.sh post' to create one" && return

lines=""
n=1
while IFS='' read -r i; do
is_boilerplate_file "$i" && continue
line="$n # $(get_post_title "$i") # $(LC_ALL=$date_locale date -r "$i" +"$date_format")"
lines+=$line\\n
n=$(( n + 1 ))
done < <(ls -t ./*.html)

echo -e "$lines" | column -t -s "#"
}

# Generate the feed file
make_rss() {
echo -n "Making RSS "

rssfile=$blog_feed.$RANDOM
while [[ -f $rssfile ]]; do rssfile=$blog_feed.$RANDOM; done

{
pubdate=$(LC_ALL=C date +"$date_format_full")
echo '<?xml version="1.0" encoding="UTF-8" ?>'
echo '<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/">'
echo "<channel><title>$global_title</title><link>$global_url/$index_file</link>"
echo "<description>$global_description</description><language>en</language>"
echo "<lastBuildDate>$pubdate</lastBuildDate>"
echo "<pubDate>$pubdate</pubDate>"
echo "<atom:link href=\"$global_url/$blog_feed\" rel=\"self\" type=\"application/rss+xml\" />"

n=0
while IFS='' read -r i; do
is_boilerplate_file "$i" && continue
((n >= number_of_feed_articles)) && break # max 10 items
echo -n "." 1>&3
echo '<item><title>'
get_post_title "$i"
echo '</title><description><![CDATA['
get_html_file_content 'text' 'entry' $cut_do <"$i"
echo "]]></description><link>$global_url/${i#./}</link>"
echo "<guid>$global_url/$i</guid>"
echo "<dc:creator>$(get_post_author "$i")</dc:creator>"
echo "<pubDate>$(LC_ALL=C date -r "$i" +"$date_format_full")</pubDate></item>"

n=$(( n + 1 ))
done < <(ls -t ./*.html)

echo '</channel></rss>'
} 3>&1 >"$rssfile"
echo ""

mv "$rssfile" "$blog_feed"
chmod 644 "$blog_feed"
}

# generate headers, footers, etc
create_includes() {
{
echo "<h1 class=\"nomargin\"><a class=\"ablack\" href=\"$global_url/$index_file\">$global_title</a></h1>"
echo "<div id=\"description\"><p>$global_description</br></p><a href=\"$archive_index\">$template_archive</a> — <a href=\"$tags_index\">$template_tags_title</a> — <a href=\"$feed\">$template_subscribe</a></div>"
} > ".title.html"

if [[ -f $header_file ]]; then cp "$header_file" .header.html
else {
echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">'
echo '<html xmlns="http://www.w3.org/1999/xhtml"><head>'
echo '<meta http-equiv="Content-type" content="text/html;charset=UTF-8" />'
echo '<meta name="viewport" content="width=device-width, initial-scale=1.0" />'
printf '<link rel="stylesheet" href="%s" type="text/css" />\n' "${css_include[@]}"
if [[ -z $global_feedburner ]]; then
echo "<link rel=\"alternate\" type=\"application/rss+xml\" title=\"$template_subscribe_browser_button\" href=\"$blog_feed\" />"
else
echo "<link rel=\"alternate\" type=\"application/rss+xml\" title=\"$template_subscribe_browser_button\" href=\"$global_feedburner\" />"
fi
} > ".header.html"
fi

if [[ -f $footer_file ]]; then cp "$footer_file" .footer.html
else {
protected_mail=${global_email//@/@}
protected_mail=${protected_mail//./.}
echo "<div id=\"footer\">$global_license <a href=\"$global_author_url\">$global_author</a> — <a href=\"mailto:$protected_mail\">$protected_mail</a><br/>"
echo 'Generated with <a href="https://github.com/cfenollosa/bashblog">bashblog</a>, a single bash script to easily create blogs like this one</div>'
} >> ".footer.html"
fi
}

# Delete the temporarily generated include files
delete_includes() {
rm ".title.html" ".footer.html" ".header.html"
}

# Create the css file from scratch
create_css() {
# To avoid overwriting manual changes. However it is recommended that
# this function is modified if the user changes the blog.css file
(( ${#css_include[@]} > 0 )) && return || css_include=('main.css' 'blog.css')
if [[ ! -f blog.css ]]; then
# blog.css directives will be loaded after main.css and thus will prevail
echo '#title{font-size: x-large;}
a.ablack{color:black !important;}
li{margin-bottom:8px;}
ul,ol{margin-left:24px;margin-right:24px;}
#all_posts{margin-top:24px;text-align:center;}
.subtitle{font-size:small;margin:12px 0px;}
.content p{margin-left:24px;margin-right:24px;}
h1{margin-bottom:12px !important;}
#description{font-size:large;margin-bottom:12px;}
h3{margin-top:42px;margin-bottom:8px;}
h4{margin-left:24px;margin-right:24px;}
img{max-width:100%;}
#twitter{line-height:20px;vertical-align:top;text-align:right;font-style:italic;color:#333;margin-top:24px;font-size:14px;}' > blog.css
fi

# If there is a style.css from the parent page (i.e. some landing page)
# then use it. This directive is here for compatibility with my own
# home page. Feel free to edit it out, though it doesn't hurt
if [[ -f ../style.css ]] && [[ ! -f main.css ]]; then
ln -s "../style.css" "main.css"
elif [[ ! -f main.css ]]; then
echo 'body{font-family:Georgia,"Times New Roman",Times,serif;margin:0;padding:0;background-color:#F3F3F3;}
#divbodyholder{padding:5px;background-color:#DDD;width:100%;max-width:874px;margin:24px auto;}
#divbody{border:solid 1px #ccc;background-color:#fff;padding:0px 48px 24px 48px;top:0;}
.headerholder{background-color:#f9f9f9;border-top:solid 1px #ccc;border-left:solid 1px #ccc;border-right:solid 1px #ccc;}
.header{width:100%;max-width:800px;margin:0px auto;padding-top:24px;padding-bottom:8px;}
.content{margin-bottom:5%;}
.nomargin{margin:0;}
.description{margin-top:10px;border-top:solid 1px #666;padding:10px 0;}
h3{font-size:20pt;width:100%;font-weight:bold;margin-top:32px;margin-bottom:0;}
.clear{clear:both;}
#footer{padding-top:10px;border-top:solid 1px #666;color:#333333;text-align:center;font-size:small;font-family:"Courier New","Courier",monospace;}
a{text-decoration:none;color:#003366 !important;}
a:visited{text-decoration:none;color:#336699 !important;}
blockquote{background-color:#f9f9f9;border-left:solid 4px #e9e9e9;margin-left:12px;padding:12px 12px 12px 24px;}
blockquote img{margin:12px 0px;}
blockquote iframe{margin:12px 0px;}' > main.css
fi
}

# Regenerates all the single post entries, keeping the post content but modifying
# the title, html structure, etc
rebuild_all_entries() {
echo -n "Rebuilding all entries "

for i in ./*.html; do
is_boilerplate_file "$i" && continue;
contentfile=.tmp.$RANDOM
while [[ -f $contentfile ]]; do contentfile=.tmp.$RANDOM; done

echo -n "."
# Get the title and entry, and rebuild the html structure from scratch (divs, title, description...)
title=$(get_post_title "$i")

get_html_file_content 'text' 'text' <"$i" >> "$contentfile"

# Read timestamp from post, if present, and sync file timestamp
timestamp=$(awk '// { print }' "$i" | cut -d '#' -f 2)
[[ -n $timestamp ]] && touch -t "$timestamp" "$i"
# Read timestamp from file in correct format for 'create_html_page'
timestamp=$(LC_ALL=C date -r "$i" +"$date_format_full")

create_html_page "$contentfile" "$i.rebuilt" no "$title" "$timestamp" "$(get_post_author "$i")"
# keep the original timestamp!
timestamp=$(LC_ALL=C date -r "$i" +"$date_format_timestamp")
mv "$i.rebuilt" "$i"
chmod 644 "$i"
touch -t "$timestamp" "$i"
rm "$contentfile"
done
echo ""
}

# Displays the help
usage() {
echo "$global_software_name v$global_software_version"
echo "Usage: $0 command [filename]"
echo ""
echo "Commands:"
echo " post [-html] [filename] insert a new blog post, or the filename of a draft to continue editing it"
echo " it tries to use markdown by default, and falls back to HTML if it's not available."
echo " use '-html' to override it and edit the post as HTML even when markdown is available"
echo " edit [-n|-f] [filename] edit an already published .html or .md file. **NEVER** edit manually a published .html file,"
echo " always use this function as it keeps internal data and rebuilds the blog"
echo " use '-n' to give the file a new name, if title was changed"
echo " use '-f' to edit full html file, instead of just text part (also preserves name)"
echo " delete [filename] deletes the post and rebuilds the blog"
echo " rebuild regenerates all the pages and posts, preserving the content of the entries"
echo " reset deletes everything except this script. Use with a lot of caution and back up first!"
echo " list list all posts"
echo " tags [-n] list all tags in alphabetical order"
echo " use '-n' to sort list by number of posts"
echo ""
echo "For more information please open $0 in a code editor and read the header and comments"
}

# Delete all generated content, leaving only this script
reset() {
echo "Are you sure you want to delete all blog entries? Please write \"Yes, I am!\" "
read -r line
if [[ $line == "Yes, I am!" ]]; then
rm .*.html ./*.html ./*.css ./*.rss &> /dev/null
echo
echo "Deleted all posts, stylesheets and feeds."
echo "Kept your old '.backup.tar.gz' just in case, please delete it manually if needed."
else
echo "Phew! You dodged a bullet there. Nothing was modified."
fi
}

# Detects if GNU date is installed
date_version_detect() {
date --version >/dev/null 2>&1
if (($? != 0)); then
# date utility is BSD. Test if gdate is installed
if gdate --version >/dev/null 2>&1 ; then
date() {
gdate "$@"
}
else
# BSD date
date() {
if [[ $1 == -r ]]; then
# Fall back to using stat for 'date -r'
format=${3//+/}
stat -f "%Sm" -t "$format" "$2"
elif [[ $2 == --date* ]]; then
# convert between dates using BSD date syntax
command date -j -f "$date_format_full" "${2#--date=}" "$1"
else
# acceptable format for BSD date
command date -j "$@"
fi
}
fi
fi
}

# Main function
# Encapsulated on its own function for readability purposes
#
# $1 command to run
# $2 file name of a draft to continue editing (optional)
do_main() {
# Detect if using BSD date or GNU date
date_version_detect
# Load default configuration, then override settings with the config file
global_variables
[[ -f $global_config ]] && source "$global_config" &> /dev/null
global_variables_check

# Check for $EDITOR
[[ -z $EDITOR ]] &&
echo "Please set your \$EDITOR environment variable. For example, to use nano, add the line 'export EDITOR=nano' to your \$HOME/.bashrc file" && exit

# Check for validity of argument
[[ $1 != "reset" && $1 != "post" && $1 != "rebuild" && $1 != "list" && $1 != "edit" && $1 != "delete" && $1 != "tags" ]] &&
usage && exit

[[ $1 == list ]] &&
list_posts && exit

[[ $1 == tags ]] &&
list_tags "$@" && exit

if [[ $1 == edit ]]; then
if (($# < 2)) || [[ ! -f ${!#} ]]; then
echo "Please enter a valid .md or .html file to edit"
exit
fi
fi

# Test for existing html files
if ls ./*.html &> /dev/null; then
# We're going to back up just in case
tar -c -z -f ".backup.tar.gz" -- *.html &&
chmod 600 ".backup.tar.gz"
elif [[ $1 == rebuild ]]; then
echo "Can't find any html files, nothing to rebuild"
exit
fi

# Keep first backup of this day containing yesterday's version of the blog
[[ ! -f .yesterday.tar.gz || $(date -r .yesterday.tar.gz +'%d') != "$(date +'%d')" ]] &&
cp .backup.tar.gz .yesterday.tar.gz &> /dev/null

[[ $1 == reset ]] &&
reset && exit

create_css
create_includes
[[ $1 == post ]] && write_entry "$@"
[[ $1 == rebuild ]] && rebuild_all_entries && rebuild_tags
[[ $1 == delete ]] && rm "$2" &> /dev/null && rebuild_tags
if [[ $1 == edit ]]; then
if [[ $2 == -n ]]; then
edit "$3"
elif [[ $2 == -f ]]; then
edit "$3" full
else
edit "$2" keep
fi
fi
rebuild_index
all_posts
all_tags
make_rss
delete_includes
}

#
# MAIN
# Do not change anything here. If you want to modify the code, edit do_main()
#
do_main "$@"

# vim: set shiftwidth=4 tabstop=4 expandtab: