kindle

#!/bin/bash
# Function to sync books from local directory with your Kindle.
# Be sure to fill in the following variables (first three lines of function):
#   TO
#   FROM
#   TYPE
# The ${TYPE} varible is the file extension for the books: pdf, mobi, epub, etc.
#
# PDFs can be converted to the Kindle format so you can take advantage of functionality
# such as variable font size, annotations, and Whispersync. To have a document converted 
# to Kindle format (.azw), set the ${CONVERT} variable to 'yes'.
#
# You can read more about this process at:
#   https://www.amazon.com/gp/sendtokindle/email
function books {
  local TO=
  local FROM=
  local TYPE=
  local -l CONVERT=no

  local -l ANS
  local -i COUNT=$((ls *.${TYPE} | wc -l) 2> /dev/null)

  # Font color.
  RED=$(tput setaf 1)
  GREEN=$(tput setaf 2)
  YELLOW=$(tput setaf 3)
  BLUE=$(tput setaf 4)
  MAGENTA=$(tput setaf 5)
  CYAN=$(tput setaf 6)
  WHITE=$(tput setaf 7)
  NF=$(tput sgr0) #No Formatting.

  if [ "${TYPE,,}" == "pdf" ] && [ "${CONVERT}" == "yes" ]; then
    local SUBJECT=convert
  else
    local SUBJECT=" "
  fi

  if [ ${COUNT} -gt 0 ]; then
    echo -e "  Greetings Reader. I have found the following ${RED}${COUNT}${NF} book(s):\n"
    ls *.${TYPE}
    echo -e "\nWould you like to send these book(s) to your Kindle?"
    read -p "N/y > " ANS
  else
    echo "No '${RED}${TYPE}${NF}' books found in the current directory: ${PWD}"
    return 1
  fi

  if echo ${ANS} | grep '^y' > /dev/null 2>&1; then
    for book in *.${TYPE}; do
      echo | mail -a ${book} -s ${SUBJECT} -r ${FROM} ${TO}
    done
  fi
}