#!/bin/bash

#

# cli.sh -- This function initiates centos-art command-line interface.

# Variables defined in this function are accesible by all other

# functions. The cli function is the first script executed by

# centos-art command-line onces invoked.

#

# Copyright (C) 2009, 2010, 2011 The CentOS Artwork SIG

#

# This program 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 2 of the License, or (at

# your option) any later version.

#

# This program 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 this program; if not, write to the Free Software

# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

#

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

# $Id$

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

function cli {

    # Initialize global variables.

    local FUNCNAM=''

    local FUNCDIR=''

    local FUNCDIRNAM=''

    local FUNCSCRIPT=''

    local ARGUMENTS=''

    # Initialize default value to filter flag. The filter flag

    # (--filter) is used mainly to reduce the number of files to

    # process. The value of this variable is interpreted as

    # egrep-posix regular expression.  By default, everything matches.

    local FLAG_FILTER='.+'

    # Initialize default value to verbosity flag. The verbosity flag

    # (--quiet) controls whether centos-art.sh script prints messages

    # or not. By default, all messages are printed out.

    local FLAG_QUIET='false'

    # Initialize default value to answer flag. The answer flag

    # (--answer-yes) controls whether centos-art.sh script does or

    # does not pass confirmation request points. By default, it

    # doesn't.

    local FLAG_ANSWER='false'

    # Initialize default value to don't commit changes flag. The don't

    # commit changes flag (--dont-commit-changes) controls whether

    # centos-art.sh script syncronizes changes between the central

    # repository and the working copy. By default, it does.

    local FLAG_DONT_COMMIT_CHANGES='false'

    # Redefine ARGUMENTS variable using current positional parameters. 

    cli_parseArgumentsReDef "$@"

    # Define function directory (FUNCDIR). The directory path where

    # functionalities are stored inside the repository.

    FUNCDIR=${CLI_BASEDIR}/Functions

    # Check function name. The function name is critical for

    # centos-art.sh script to do something coherent. If it is not

    # provided, execute the help functionality and end script

    # execution.

    if [[ "$1" == '' ]];then

        exec ${CLI_BASEDIR}/centos-art.sh help

        exit

    fi

    # Define function name (FUNCNAM) variable from first command-line

    # argument.  As convenction we use the first argument to determine

    # the exact name of functionality to call.

    FUNCNAM=$(cli_getRepoName $1 -f)

    # Define function directory. 

    FUNCDIRNAM=$(cli_getRepoName $FUNCNAM -d)

    # Define function file name.

    FUNCSCRIPT=${FUNCDIR}/${FUNCDIRNAM}/${FUNCNAM}.sh

    # Check function script execution rights.

    cli_checkFiles "${FUNCSCRIPT}" --execution

    # Remove the first argument passed to centos-art.sh command-line

    # in order to build optional arguments inside functionalities. We

    # start counting from second argument (inclusive) on.

    shift 1

    # Redefine ARGUMENTS using current positional parameters.

    cli_parseArgumentsReDef "$@"

    # Define default text editors used by centos-art.sh script.

    if [[ ! "$EDITOR" =~ '/usr/bin/(vim|emacs|nano)' ]];then

        EDITOR='/usr/bin/vim'

    fi

    # Check text editor execution rights.

    cli_checkFiles $EDITOR --execution

    # Go for function initialization. Keep the cli_exportFunctions

    # function calling after all variables and arguments definitions.

    cli_exportFunctions "${FUNCDIR}/${FUNCDIRNAM}"

    # Execute function.

    eval $FUNCNAM

}