#!/bin/sh
##
## SCRIPT NAME: findMediaFiles_forCriteria.sh
##
##+#######
## PURPOSE:
##  This script finds a set of user-specified 'media' files --- according to
##  a fully-qualified file mask (directory and mask) and about seven other
##  'find' parameters passed to this script.
##
##  This shell script is meant to be issued from the Tk GUI 'wrapper' script
##  'find_and_mediaPlayer_FrontEnd.tk'.
##  That Tk script is to get parameters for the 'find' command
##
##+######
## INPUTS:
##
##  The parameters passed to this script, from the
##  'find_and_mediaPlayer_FrontEnd.tk' Tk GUI script, are:
## 
##   Var1: 'Base'-directory name and file mask. Examples:
##          /home/fred/MOVIES/*vacation*.mp4
##                    or
##          /home/fred/MUSIC/*Lennon*.mp3
##
##   Var2: A 'levels' indicator - from a Tk radiobuttons var.
##         (possible values: 'one' or 'all').
##
##   Var3: A 'case-sensitivity' indicator - from a Tk radiobuttons var.
##         (possible values: 'case-sensitive' or 'case-INsensitive')
##
##   Var4: A 'bigger/smaller' indicator from a Tk radiobuttons var
##.        (possible values: 'bigger' or 'smaller')
##
##   Var5: An integer file-size-cutoff value (in KiloBytes)
##         (could be null, indicating no size limitation)
##
##   Var6: An 'older/younger' indicator - from a Tk radiobuttons var.
##.        (possible values: 'older' or 'younger')
##
##   Var7: An integer file-age-cutoff value (in days)
##         (could be null, indicating no age limitation)
##
##   Var8: A file-type string --- such as 'MPEG v4' or 'Flash' or 'ASF'
##                                or 'QuickTime' or 'layer III' or 'PCM'
##
##   Var9: The name of a (temporary) output file to be used to
##         hold the filenames found by the 'find' command.
##
## In this script, we will put those parameters in shell script variables
## VARfilemask, VARlevels, VARsense,
## VARbigsmall,  VARfilesize,
## VARoldyoung,  VARfileage,
## VARfiletype,  VARoutfile  --- respectively.
##
##+#########################################################################
## MAINTENANCE HISTORY:
## Started by: Blaise Montandon 2014apr25 Made this 'findMediaFiles_forCriteria.sh'
##                                        shell script by revising shell script
##                                        'getMediaFiles_andCountListOrPlay.sh'
##                                        (which was started 2013dec15) to
##                                        do the 'find' command but eliminate
##                                        the count/list/play logic.
## Updated by: Blaise Montandon 2014
##+#########################################################################

## FOR TESTING: (to show statements as they execute)
#  set -x

VARfilemask="$1"
VARlevels="$2" 
VARsense="$3"
VARbigsmall="$4"
VARfilesize="$5"
VARoldyoung="$6"
VARfileage="$7"
VARfiletype="$8"
VARoutfile="$9"


## FOR TESTING of this script without the Tk wrapper:
## (For stand-alone testing, change 'if test 1 = 0' to 'if test 1 = 1'.)

if test 1 = 0
then

   # VARfilemask="$HOME/apps/tkGooies_linux_PREP/tkGUIs/.PREP_tkGooies/00_CFE_find_and_mediaplayer_FrontEnd_2013dec_PREP/*"
   VARfilemask="$HOME/TESTfilesMOVIES/*.flv"
   # VARfilemask="$HOME/TESTfilesAUDIO/*.mp3"

   VARlevels="one"
   # VARlevels="all"

   VARsense="case-sensitive"
   # VARsense="case-INsensitive"

   VARbigsmall="bigger"
   # VARbigsmall="smaller"

   VARfilesize=""

   VARoldyoung="older"
   # VARoldyoung="younger"

   VARfileage=""

     VARfiletype="MPEG v4"
   # VARfiletype="MPEG"
   # VARfiletype="layer III"

   VARoutfile="/tmp/${USER}_tkBatchMediaPlayer_filenames.lis"

fi

## FOR TESTING:
#   echo "VARfilemask: $VARfilemask"


## Simply exit if there is no filemask passed to this script.

if test "$VARfilemask" = ""
then
   exit
fi

DIRNAME=`dirname "$VARfilemask"`
FILEMASK=`basename "$VARfilemask"`

if test "$VARlevels" = "one"
then 
   DEPTHPARM="-maxdepth 1"
else
   DEPTHPARM=""
fi


if test "$VARsense" = "case-sensitive"
then 
   NAMEPARM="-name"
else
   NAMEPARM="-iname"
fi


## The FILESIZE_PARM can be a parameter like
##      -size +${SIZE_MINinBYTES}c
## for the 'find' command.

if test "$VARfilesize" = ""
then
   FILESIZE_PARM=""
else
   SIZEinBYTES=`expr $VARfilesize \* 1000`
   if test "$VARbigsmall" = "bigger"
   then
      # FILESIZE_PARM="-size +${SIZEinBYTES}c"
      FILESIZE_PARM="( -size +${SIZEinBYTES}c -o -size ${SIZEinBYTES}c )"
      ## Note that we do not need to 'escape' the parentheses like we
      ## do in a 'find' command entered at a shell command prompt, because
      ## the parentheses are 'protected' by being within a variable,
      ## rather than being 'exposed' in a command string.
   else
      FILESIZE_PARM="-size -${SIZEinBYTES}c"
   fi
fi


## The FILEAGE_PARM can be a parameter like
##     -mtime +$NDAYS
## for the 'find' command.

if test "$VARfileage" = ""
then
   FILEAGE_PARM=""
else
   if test "$VARoldyoung" = "older"
   then
      FILEAGE_PARM="-mtime +$VARfileage"
   else
      FILEAGE_PARM="-mtime -$VARfileage"
   fi
fi


#############################################################
## Prepare to use the temp filename to hold the filenames.
## Make sure we start with a new (empty) output file.
#############################################################

rm -f "$VARoutfile"


#############################################################
## Get the directory name of this script, to call
## on another script in the same directory as this script.
#############################################################

thisDIR=`dirname $0`

##+#####################################################
## Call on the 'find' command, which puts the
## 'found' filenames, SORTED, in file "$VARoutfile".
##
## We use a '-type d -fprint /dev/stderr' clause in the
## 'find' command to show directories being searched,
## in the 'xterm' that runs this script.
## This gives a kind of 'progress indicator' to let the
## user know how far/fast the 'find' command is progressing. 
##
## We also use the 'tee' command to output 'found' filenames 
## to 'stdout', as a means of providing a 'progress
## indicator' in the 'xterm' that runs this script.
## However, if not many filenames are found and then the
## 'xterm' closes quickly, the user may not get much
## of a progress indicator by this.
##
## The directory-name output is probably going to be
## the better progress indicator in most cases.
##+####################################################
## NOTE: Do not escape the quotes around $FILEMASK.
##       If you do, no filenames are returned.
##+######################################################

## FOR TESTING: (to show the 'find' commands as they execute)
## (When called from within the Tk wrapper script,
##  this output may interfere with proper processing.)
#  set -x

if test "$VARfiletype" = ""
then
   find "$DIRNAME"  \
      \( -type d -fprint /dev/stderr \) , \
      \( $DEPTHPARM  -type f  $NAMEPARM "$FILEMASK" \
      $FILESIZE_PARM $FILEAGE_PARM -print \) | sort | \
      tee "$VARoutfile"
      # $thisDIR/tee_substitute.sh "$VARoutfile"
else
   find "$DIRNAME" \
      \( -type d -fprint /dev/stderr \) , \
      \( $DEPTHPARM  -type f $NAMEPARM "$FILEMASK" \
      $FILESIZE_PARM $FILEAGE_PARM -exec file {} \; \) | \
      grep ":.*$VARfiletype" | cut -d: -f1 | sort | \
      tee "$VARoutfile"
      # $thisDIR/tee_substitute.sh "$VARoutfile"
fi