#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2016 OpenFOAM Foundation
#    \\/     M anipulation  |
#-------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM is free software: you can redistribute it and/or modify it
#     under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
#
#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
#     for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# Script
#     foamSearch
#
# Description
#     Searches a directory for dictionary files of a particular name and
#     extracts entries of a particular keyword, sorting into a unique list.
#
#     Requires foamDictionary.
#
#------------------------------------------------------------------------------
usage() {
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE
Usage: ${0##*/} [OPTIONS] <directory> <keyword> <file>

Options:
-c | -count       prefix lines by the number of occurrences
-h | -help        help

* Searches the <directory> for files named <file> and extracts entries with
  <keyword>.  Sorts result into a list of unique entries (removing repeats).

  Examples:
  * Default ddtSchemes entries in the fvSchemes files in all tutorials:
      foamSearch \$FOAM_TUTORIALS ddtSchemes.default fvSchemes
  * Relaxations factors for U in fvSolutions files in all tutorials:
      foamSearch -c \$FOAM_TUTORIALS relaxationFactors.equations.U fvSolution

USAGE
    exit 1
}


#------------------------------------------------------------------------------
unset optCount

# Parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    -h | -help)
        usage
        ;;
    -c | -count)
        optCount="-c"
        shift
        ;;
    -*)
        usage "unknown option: '$1'"
        ;;
    *)
        break
        ;;
    esac
done

[ "$#" -eq 3 ] || usage "Wrong number of arguments: expected 3, found $#"
[ -d "$1" ] || usage "$1 is not a directory"

dirName="$1"
key="$2"
fileName="$3"

fileList=$(find $dirName -name $fileName -type f)
[ -n "$fileList" ] || usage "No file $fileName found in $dir"

tmpFile=temp.$$
trap "rm -f $tmpFile 2>/dev/null; exit 0" EXIT TERM INT

for i in $fileList
do
    foamDictionary -entry "$key" $i 2>/dev/null
done > $tmpFile

[ -s "$tmpFile" ] && \
    sort $tmpFile | uniq $optCount | sed '/^[\t 1-9]*$/d' || \
    echo "No keyword '$key' found in '$fileName' files" 1>&2

#------------------------------------------------------------------------------