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#!/usr/bin/env sh
# Description: Browse Project Gutenberg catalogue by popularity, then download
# and read a book of your choice.
#
# Details: Set the variable EBOOK_ID to download in html format and read in w3m.
# Clear EBOOK_ID to browse available ebooks by popularity and set it to
# the ID once you find an interesting one.
# To dowload and read in epub format set READER to an epub reader like
# epr: https://github.com/wustho/epr
#
# More on EBOOK_ID:
# Wuthering Heights by Emily Brontë is at https://www.gutenberg.org/ebooks/768
# So EBOOK_ID would be 768
#
# Downloaded ebooks are at ${XDG_CACHE_HOME:-$HOME/.cache}/nnn/gutenbooks/
#
# Shell: POSIX compliant
# Author: Arun Prakash Jana
EBOOK_ID="${EBOOK_ID}"
DIR="${XDG_CACHE_HOME:-$HOME/.cache}/nnn/gutenbooks/$EBOOK_ID"
BROWSE_LINK="http://www.gutenberg.org/ebooks/search/?sort_order=downloads"
BROWSER="${BROWSER:-w3m}"
READER="${READER}"
if [ -n "$EBOOK_ID" ]; then
if [ ! -e "$DIR" ]; then
mkdir -p "$DIR"
cd "$DIR" || exit 1
if [ -z "$READER" ]; then
curl -L -O "https://www.gutenberg.org/files/$EBOOK_ID/$EBOOK_ID-h.zip"
unzip "$EBOOK_ID"-h.zip
else
curl -L -o "$EBOOK_ID".epub "http://www.gutenberg.org/ebooks/$EBOOK_ID.epub.noimages"
fi
fi
if [ -d "$DIR" ]; then
if [ -z "$READER" ]; then
"$BROWSER" "$DIR/$EBOOK_ID-h/$EBOOK_ID-h.htm"
else
"$READER" "$DIR/$EBOOK_ID.epub"
fi
fi
else
"$BROWSER" "$BROWSE_LINK"
fi
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