#!/bin/bash
# 2008-09-23
umask 022

[[ $# -ne 0 ]] && set -o xtrace && set -o verbose # change to - to enable verbose debugging


### SHELL OPTIONS
set +o noclobber # allowed to clobber files
set +o noglob # globbing on
set -e # abort on first error
shopt -s extglob

VER="1.1"
SEARCH="AskApache";
REPLACE="AskApache1";
SDIR=$PWD;



###########################################################################--=--=--=--=--=--=--=--=--=--=--#
###
### FUNCTIONS
###
###########################################################################==-==-==-==-==-==-==-==-==-==-==#



#--=--=--=--=--=--=--=--=--=--=--#
# script_title
#==-==-==-==-==-==-==-==-==-==-==#
function script_title(){
  #=# TURNS ON COLORING ONLY FOR TERMS THAT CAN SUPPORT IT
  C="\033[";C0=;C1=;C2=;C3=;C4=;C5=;C6=;C7=;C8=;C9=;
  case ${TERM:-dummy} in linux*|con80*|con132*|console|xterm*|vt*|screen*|putty|Eterm|dtterm|ansi|rxvt|gnome*|*color*)
  C0="${C}0m";C1="${C}1;30m";C2="${C}1;32m";C3="${C}0;32m";C4="${C}1;37m";C5="${C}0;36m";C6="${C}1;35m";C7="${C}0;37m";C8="${C}30;42m";C9="${C}1;36m"; ;;
  esac
  
  clear
	echo -e "${C1} __________________________________________________________________________ "
	echo -e "| ${C2}             ___       __    ___                 __             ${C1}         |"
	echo -e "| ${C2}            / _ | ___ / /__ / _ | ___  ___ _____/ /  ___        ${C1}         |"
	echo -e "| ${C2}           / __ |(_-</  '_// __ |/ _ \/ _ \`/ __/ _ \/ -_)       ${C1}         |"
	echo -e "| ${C3}          /_/ |_/___/_/\_\/_/ |_/ .__/\_,_/\__/_//_/\__/        ${C1}         |"
	echo -e "| ${C3}                               /_/                              ${C1}         |"
	echo -e "|                                                                          |"
	echo -e "|                 ${C4} FIND AND REPLACE SCRIPT Version ${VER} ${C1}                    |"
	echo -e "${C1} __________________________________________________________________________ ${C0} \n\n"
}

#--=--=--=--=--=--=--=--=--=--=--#
# pm
#==-==-==-==-==-==-==-==-==-==-==#
function pm()
{ echo -en "\n\n${C2}>>> ${C4}${1} ${C0}\n\n"; return 0; }


#--=--=--=--=--=--=--=--=--=--=--#
# pi
#==-==-==-==-==-==-==-==-==-==-==#
function pi()
{ echo -e "${C6}=> ${C4}${1} ${C0}"; return 0; }


#--=--=--=--=--=--=--=--=--=--=--#
# ok_continue
#==-==-==-==-==-==-==-==-==-==-==#
function ok_continue()
{ local ans; echo -en "${C4} \n [ Press any key to continue ] ${C0} \n"; read -n 1 ans; return 0; }



#--=--=--=--=--=--=--=--=--=--=--#
# yes_no
#==-==-==-==-==-==-==-==-==-==-==#
function yes_no()
{ local a YN=65; echo -en "${C2}>>> ${C4}${1:-Q} [y/n] ${C0}"; read -n 1 a; case $a in [yY]) YN=0; ;; esac; return $YN; }



#--=--=--=--=--=--=--=--=--=--=--#
# p_done
#==-==-==-==-==-==-==-==-==-==-==#
function p_done()
{ sleep 1; echo -e "\n${C8} DONE ${C0} \n"; sleep 1; return 0; }


#--=--=--=--=--=--=--=--=--=--=--#
# get_settings
#==-==-==-==-==-==-==-==-==-==-==#
function get_settings(){
  local a cha
  script_title
  while true; do
  for a in "SDIR" "SEARCH" "REPLACE"; do
  cha=g
  echo -en "\n ${C4}(Enter for Default: ${!a} )${C0}\n ${a}${C6}=> ${C0} "; read -e cha; echo;
  [[ ${#cha} -gt 2 ]] && eval "$a"=$cha;
  done
  yes_no "ARE THESE SETTINGS CORRECT" && echo -e "\n\n" && break
  done
}


#--=--=--=--=--=--=--=--=--=--=--#
# search_and_replace
#==-==-==-==-==-==-==-==-==-==-==#
function search_and_replace(){
  for i in $(seq 0 $((${#FOUNDFILES[@]} - 1))); do
  thefile=${FOUNDFILES[$i]}
  
  if [[ $1 -eq 0 ]]; then
  echo -e "\n\n\n___________________________________________________________________\n"
  echo -e "${C4}FILE:  ${C3}${thefile} ${C2}($(command du -hs ${thefile}|awk '{ print $1}'))"
  echo -e "${C4}Type:  ${C6}$(command file -b ${thefile})"
  echo -e "${C7}Matching Lines:${C0}"
  grep --color=always $SEARCH $thefile
  echo -e "\n___________________________________________________________________\n"
  
  while true; do
  yes_no "Replace occurances of ${SEARCH} with ${REPLACE}?" && echo -e "\nREPLACING...\n" && sed -i -e "s%${SEARCH}%${REPLACE}%g" $thefile && p_done && break
  echo -e "\nSKIPPING..\n" && p_done && break
  done
  
  else
  sed -i -e "s%${SEARCH}%${REPLACE}%g" $thefile
  fi
  done
  
  return 0;
}




############################################################################################################
###
### MAIN CODE
###
############################################################################################################

#=# CATCH SCRIPT KILLED BY USER
trap 'echo error; kill -9 $$' SIGHUP SIGINT SIGTERM

#=# ALLOWS SCRIPT TO WORK WHEN RUN STARTED FROM ANY DIRECTORY
cd `dirname $0`

#=# MAKE MAIN SCRIPT NICE AS POSSIBLE SINCE IT DOESNT DO MUCH
renice 19 -p $$ &>/dev/null

#=# GET SCRIPT SETTINGS
get_settings

#=# DISPLAY SCRIPT TITLE
script_title

cd $SDIR
declare -a FOUNDFILES=( `grep -R -l $SEARCH . 2>/dev/null` );
declare -a FOUNDMATCHES=(  );
for i in $(seq 0 $((${#FOUNDFILES[@]} - 1))); do F=${FOUNDFILES[$i]}; FOUNDMATCHES[$i]=$(grep -c $SEARCH $F); done

pm "FOUND ${SEARCH} IN ${#FOUNDFILES[@]} FILES"
for i in $(seq 0 $((${#FOUNDFILES[@]} - 1))); do echo -e "${C4}${FOUNDFILES[$i]} ${C6}=>${C4} ${FOUNDMATCHES[$i]} matches"; done
echo -e "\n"

while true; do
 yes_no "Replace all occurances of ${SEARCH} with ${REPLACE} without prompting?" && search_and_replace 1 && p_done && break
 search_and_replace 0 && p_done && break
done

cd $OLDPWD

exit 0