#!/bin/sh

run_user=$(id -u)
if [ "$run_user" -eq 0 ]; then
  file_atom="/var/www/html/atom.xml"
  gopher_atom="/var/gopher/atom.xml"

  ###################################################################### 
  ############################# HTML VERSION ########################### 
  ###################################################################### 

  # Add header info to xml output
  {
    printf "<?xml version=\"1.0\" encoding=\"utf-8\"?>\\n"
    printf "<feed xmlns=\"http://www.w3.org/2005/Atom\">\\n"
    printf "<title>Cosmic Voyage</title>\\n"
    printf "<subtitle>Messages from the human stellar diaspora</subtitle>\\n"
    printf "<link rel=\"alternate\" href=\"https://cosmic.voyage/\"/>\\n"
    printf "<link rel=\"self\" href=\"https://cosmic.voyage/atom.xml\" />\\n"
    firstlog=$(head -n1 "/var/gopher/listing.gophermap" | awk -F'\t' '{print $2}')
    printf "<updated>%s</updated>\\n" "$(date -d "$(stat -c %y "/var/gopher${firstlog}")" +'%Y-%m-%dT%H:%M:%SZ')"
    printf "<rights>©2021 All rights reserved</rights>\\n"
    printf "<id>https://cosmic.voyage/</id>\\n"
  } > "${file_atom}"

  # Loop through listings gophermap
  loop=0
  while read -r line; do
    loop=$((loop+1))
    if [ "$loop" -lt 20 ]; then
      log=$(printf "%s" "$line" | awk -F'\t' '{print $2}')
      title=$(printf "%s" "$line" | awk -F'\t' '{print $1}' | sed 's|^.||')
      owner=$(stat -c %U "/var/gopher${log}")

      # print item entry for each log
      {
        printf "<entry>\\n"
        printf "  <title>%s</title>\\n" "$title"
        printf "  <author>\\n"
        printf "    <name>%s</name>\\n" "$owner"
        printf "  </author>\\n"
        printf "  <link rel=\"alternate\" href=\"https://cosmic.voyage%s\"/>\\n" "$(printf "%s" "$log" | sed 's|.txt$|.html|' | sed 's|\ |%20|g')"
        printf "  <id>https://cosmic.voyage%s</id>\\n" "$(printf "%s" "$log" | sed 's|.txt$|.html|' | sed 's|\ |%20|g')"
        printf "  <updated>%s</updated>\\n" "$(date -d "$(stat -c %y "/var/gopher${log}")" +'%Y-%m-%dT%H:%M:%SZ')"
        printf "  <content type=\"html\"><![CDATA[<pre>\\n"
        sed 's/&/\&amp;/g; s/</\&lt;/g; s/>/\&gt;/g; s/"/\&quot;/g; s/'"'"'/\&#39;/g' "/var/gopher${log}"
        printf "</pre>]]></content>\\n"
        printf "</entry>\\n"

      } >> "${file_atom}"
    fi
  done < "/var/gopher/listing.gophermap"

  # close up the footer
  {
    printf "</feed>\\n"
  } >> "${file_atom}"

  ###################################################################### 
  ########################## GOPHER  VERSION ########################### 
  ###################################################################### 

  # Add header info to xml output
  {
    printf "<?xml version=\"1.0\" encoding=\"utf-8\"?>\\n"
    printf "<feed xmlns=\"http://www.w3.org/2005/Atom\">\\n"
    printf "<title>Cosmic Voyage</title>\\n"
    printf "<subtitle>Messages from the human stellar diaspora</subtitle>\\n"
    printf "<link rel=\"alternate\" href=\"gopher://cosmic.voyage/\"/>\\n"
    printf "<link rel=\"self\" href=\"gopher://cosmic.voyage/atom.xml\" />\\n"
    firstlog=$(head -n1 "/var/gopher/listing.gophermap" | awk -F'\t' '{print $2}')
    printf "<updated>%s</updated>\\n" "$(date -d "$(stat -c %y "/var/gopher${firstlog}")" +'%Y-%m-%dT%H:%M:%SZ')"
    printf "<rights>©2021 All rights reserved</rights>\\n"
    printf "<id>gopher://cosmic.voyage/</id>\\n"
  } > "${gopher_atom}"

  # Loop through listings gophermap
  loop=0
  while read -r line; do
    loop=$((loop+1))
    if [ "$loop" -lt 20 ]; then
      log=$(printf "%s" "$line" | awk -F'\t' '{print $2}')
      title=$(printf "%s" "$line" | awk -F'\t' '{print $1}' | sed 's|^.||')
      owner=$(stat -c %U "/var/gopher${log}")

      # print item entry for each log
      {
        printf "<entry>\\n"
        printf "  <title>%s</title>\\n" "$title"
        printf "  <author>\\n"
        printf "    <name>%s</name>\\n" "$owner"
        printf "  </author>\\n"
        printf "  <link rel=\"alternate\" href=\"gopher://cosmic.voyage/0%s\"/>\\n" "$(printf "%s" "$log" | sed 's|\ |%20|g')"
        printf "  <id>gopher://cosmic.voyage/0%s</id>\\n" "$(printf "%s" "$log" | sed 's|\ |%20|g')"
        printf "  <updated>%s</updated>\\n" "$(date -d "$(stat -c %y "/var/gopher${log}")" +'%Y-%m-%dT%H:%M:%SZ')"
        printf "  <content type=\"html\"><![CDATA[<pre>\\n"
        sed 's/&/\&amp;/g; s/</\&lt;/g; s/>/\&gt;/g; s/"/\&quot;/g; s/'"'"'/\&#39;/g' "/var/gopher${log}"
        printf "</pre>]]></content>\\n"
        printf "</entry>\\n"

      } >> "${gopher_atom}"
    fi
  done < "/var/gopher/listing.gophermap"

  # close up the footer
  {
    printf "</feed>\\n"
  } >> "${gopher_atom}"

else
  exec sudo "$0" "$@"
fi