#!/usr/pkg/bin/bash

# cluster-to-other.sh
# Converts an index and posts HTML file to forms suitable for Finger, Gopher
# and Gemini and writes them to their proper locations.
# Copyright (C) 2023 Scott C. MacCallum
# scm@sdf.org

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

letter="s"
letter_range="ns"
year=$(date '+%Y')
month=$(date '+%m')
one=1
last_month=$(($month - $one))

finger()
{
    echo
    echo "Finger conversion"
    echo
    
    # Download the index.html and $month.html files
    sftp $USER@ma.sdf.org:/meta/$letter/$USER/html/index.html /sdf/arpa/$letter_range/$letter/$USER/finger
    sftp $USER@ma.sdf.org:/meta/$letter/$USER/html/posts/$year/$month.html /sdf/arpa/$letter_range/$letter/$USER/finger

    # Convert the index.html file to an index-e01 text file
    html2text -o /sdf/arpa/$letter_range/$letter/$USER/finger/index-e01 -ascii -style pretty /sdf/arpa/$letter_range/$letter/$USER/finger/index.html

    # Convert the $month.html file to a $month-e01 text file
    html2text -o /sdf/arpa/$letter_range/$letter/$USER/finger/$month-e01 -ascii -style pretty /sdf/arpa/$letter_range/$letter/$USER/finger/$month.html

    # Remove the blank lines from the beginning of the index-e01 file
    sed -i "1d;2d;3d" /sdf/arpa/$letter_range/$letter/$USER/finger/index-e01

    # Remove the blank lines from the beginning of the $month-e01 file
    sed -i "1d;2d;3d" /sdf/arpa/$letter_range/$letter/$USER/finger/$month-e01

    # Remove the control characters from the index-e01 file and write it as index-e02
    cat /sdf/arpa/$letter_range/$letter/$USER/finger/index-e01 | col -b -x > /sdf/arpa/$letter_range/$letter/$USER/finger/index-e02

    # Remove the control characters from the $month-e01 file and write it as $month-e02
    cat /sdf/arpa/$letter_range/$letter/$USER/finger/$month-e01 | col -b -x > /sdf/arpa/$letter_range/$letter/$USER/finger/$month-e02

    # Remove the HTML link reference to previous month posts
    if [ $last_month -lt 10 ]; then
	sed -i "s/0$last_month//" /sdf/arpa/$letter_range/$letter/$USER/finger/$month-e02
    else
	sed -i "s/$last_month//" /sdf/arpa/$letter_range/$letter/$USER/finger/$month-e02
    fi

    # Remove the extra blank line from the end of the post
    sed -i "9d" /sdf/arpa/$letter_range/$letter/$USER/finger/$month-e02

    # Write a header file from index-e02
    head -n 5 /sdf/arpa/$letter_range/$letter/$USER/finger/index-e02 > /sdf/arpa/$letter_range/$letter/$USER/finger/header

    # Write a footer file from index-e02
    tail -n 15 /sdf/arpa/$letter_range/$letter/$USER/finger/index-e02 > /sdf/arpa/$letter_range/$letter/$USER/finger/footer

    # Write a dotplan file from the header
    cat /sdf/arpa/$letter_range/$letter/$USER/finger/header > /sdf/arpa/$letter_range/$letter/$USER/finger/dotplan

    # Write the appended data from the $month-e02 file to dotplan
    cat /sdf/arpa/$letter_range/$letter/$USER/finger/$month-e02 >> /sdf/arpa/$letter_range/$letter/$USER/finger/dotplan

    # Write the appended data from the footer file to dotplan
    cat /sdf/arpa/$letter_range/$letter/$USER/finger/footer >> /sdf/arpa/$letter_range/$letter/$USER/finger/dotplan

    # Write the .plan file to the SDF cluster from dotplan
    cp /sdf/arpa/$letter_range/$letter/$USER/finger/dotplan /sdf/arpa/$letter_range/$letter/$USER/.plan

    # Write the .plan file to the SDF meta array from dotplan
    scp /sdf/arpa/$letter_range/$letter/$USER/finger/dotplan $USER@ma.sdf.org:/meta/$letter/$USER/.plan
}

gopher()
{
    echo
    echo "Gopher conversion"
    echo
    
    # If the year has changed, and a new year directory does not already
    # exist, create it

    # Download the index.html and $month.html files
    sftp $USER@ma.sdf.org:/meta/$letter/$USER/html/index.html /sdf/arpa/$letter_range/$letter/$USER/gopher-prep
    sftp $USER@ma.sdf.org:/meta/$letter/$USER/html/posts/$year/$month.html /sdf/arpa/$letter_range/$letter/$USER/gopher-prep

    # Convert the index.html file to an index-e01 text file
    html2text -o /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/index-e01 -ascii -style pretty /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/index.html

    # Convert the $month.html file to a $month-e01 text file
    html2text -o /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/$month-e01 -ascii -style pretty /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/$month.html

    # Remove the blank lines from the beginning of the index-e01 file
    sed -i "1d;2d;3d" /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/index-e01

    # Remove the blank lines from the beginning of the $month-e01 file
    sed -i "1d;2d;3d" /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/$month-e01

    # Remove the control characters from the index-e01 file and write it as index-e02
    cat /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/index-e01 | col -b -x > /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/index-e02

    # Remove the control characters from the $month-e01 file and write it as $month-e02
    cat /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/$month-e01 | col -b -x > /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/$month-e02

    sed -i "7d;8d;9d;10d;11d;12d" /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/index-e02

    # From the index-e02 file write the index
    cp /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/index-e02 /ftp/pub/users/$USER/index

    # From the $month-e02 file write the $month
    cp /sdf/arpa/$letter_range/$letter/$USER/gopher-prep/$month-e02 /ftp/pub/users/$USER/posts/$year/$month

    # Set the correct permissions on the Gopher directory and files
    chmod -R 754 /ftp/pub/users/$USER
}

gemini()
{
    echo
    echo "Gemini conversion"
    echo
    
    # If the year has changed, and a new year directory does not already
    # exist, create it
    
    # Download the index.html and $month.html files
    sftp $USER@ma.sdf.org:/meta/$letter/$USER/html/index.html /sdf/arpa/$letter_range/$letter/$USER/gemini
    sftp $USER@ma.sdf.org:/meta/$letter/$USER/html/posts/$year/$month.html /sdf/arpa/$letter_range/$letter/$USER/gemini

    # Convert the index.html file to an index-e01 text file
    html2text -o /sdf/arpa/$letter_range/$letter/$USER/gemini/index-e01 -ascii -style pretty /sdf/arpa/$letter_range/$letter/$USER/gemini/index.html

    # Convert the $month.html file to a $month-e01 text file
    html2text -o /sdf/arpa/$letter_range/$letter/$USER/gemini/$month-e01 -ascii -style pretty /sdf/arpa/$letter_range/$letter/$USER/gemini/$month.html

    # Remove the blank lines from the beginning of the index-e01 file
    sed -i "1d;2d;3d" /sdf/arpa/$letter_range/$letter/$USER/gemini/index-e01

    # Remove the blank lines from the beginning of the $month-e01 file
    sed -i "1d;2d;3d" /sdf/arpa/$letter_range/$letter/$USER/gemini/$month-e01

    # Remove the control characters from the index-e01 file and write it as index-e02
    cat /sdf/arpa/$letter_range/$letter/$USER/gemini/index-e01 | col -b -x > /sdf/arpa/$letter_range/$letter/$USER/gemini/index-e02

    # Remove the control characters from the $month-e01 file and write it as $month-e02
    cat /sdf/arpa/$letter_range/$letter/$USER/gemini/$month-e01 | col -b -x > /sdf/arpa/$letter_range/$letter/$USER/gemini/$month-e02

    # Remove the extra blank lines above and below the posts year
    sed -i "9d;12d" /sdf/arpa/$letter_range/$letter/$USER/gemini/index-e02

    # Write a blank line between the source and copyright information
    
    # Write the index.gmi file to the Meta Array from index-e02
    scp /sdf/arpa/$letter_range/$letter/$USER/gemini/index-e02 $USER@ma.sdf.org:/meta/gemini/$USER/index.gmi

    # Write the $month.gmi file to the Meta Array from $month-e02
    scp /sdf/arpa/$letter_range/$letter/$USER/gemini/$month-e02 $USER@ma.sdf.org:/meta/gemini/$USER/posts/$year/$month.gmi
}

finger
gopher
gemini

exit 0