#! /bin/sh

# Copyright (c) 2018-2020 Slawomir Wojciech Wojtczak (vermaden)
# All rights reserved.
#
# THIS SOFTWARE USES FREEBSD LICENSE (ALSO KNOWN AS 2-CLAUSE BSD LICENSE)
# https://www.freebsd.org/copyright/freebsd-license.html
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that following conditions are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 'AS IS' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# ------------------------------
# CONTACTS PHONE DUPLICATE CHECK
# ------------------------------
# vermaden [AT] interia [DOT] pl
# https://vermaden.wordpress.com

__usage() {
  cat << __EOF
usage: ${0##*/} FILE

__EOF
  exit 1
}

if [ ${#} -ne 1 ]
then
  __usage
fi

if [ ! -e "${1}" ]
then
  echo "NOPE: file '${1}' does not exists"
  echo
  __usage
  exit 1
fi

awk '{print $2}' "${1}" \
  | grep -v -- - \
  | tr ';' '\n' \
  | sort -n \
  | uniq -c \
  | sort -n \
  | while read COUNT PHONE
    do
      if [ ${COUNT} -eq 1 ]
      then
        continue
      else
        grep ${PHONE} "${1}"
        echo
      fi
    done