#!/bin/bash

#

# help.sh -- This function provides documentation features to

# centos-art.sh script. Here we initialize documentation variables and

# call help_getArguments functions.

#

# Copyright (C) 2009-2011 Alain Reguera Delgado

#

# 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 help {

    local ACTIONNAM=''

    local ACTIONVAL=''

    local -a ACTIONVALS

    # Define manuals base directory. This is the place where

    # documentation manuals base directory structures are stored and

    # organized in.

    MANUAL_BASEDIR="${HOME}/artwork/trunk/Manual"

    # Define file name for documentation manual. This is the file used

    # to initiate the structure of documentation manual.

    MANUAL_NAME=repository

    # Define base name for documentation manual files (without

    # extension). This is the main file name used to build texinfo

    # related files (.info, .pdf, .xml, etc.).

    MANUAL_BASEFILE="${MANUAL_BASEDIR}/${MANUAL_NAME}"

    # Interpret option arguments passed through command-line.

    help_getOptions

    # Redefine positional parameters using ARGUMENTS. At this point,

    # option arguments have been removed from ARGUMENTS variable and

    # only non-option arguments remain in it. 

    eval set -- "$ARGUMENTS"

    # Store remaining arguments into an array. This way it is possible

    # to find out which is the last argument in the list.  When

    # copying files inside the repository, the last argument in the

    # list is considered the target location and all other arguments

    # are considered source the locations. Similary, when renaming

    # files, only two arguments can be passed.

    for ACTIONVAL in "$@";do

        ACTIONVALS[((++${#ACTIONVALS[*]}))]="$ACTIONVAL"

    done

    # Enforce conditions against remaining non-option arguments before

    # processing them.

    if [[ ${ACTIONNAM} == ${FUNCNAM}_copyEntry ]];then

        # When a documentation entry is copied, we need to determine

        # what location to use as target.  To solve this, the last

        # argument passed to centos-art script is taken as target

        # location. All other arguments previously defined are

        # considered source locations. Notice that more than one

        # source location can be specified, but just one target

        # location can exist.

        local -a ENTRY_SRC

        local ENTRY_DST=''

        local COUNT=0

        # Define list of source locations using remaining arguments.

        while [[ ${COUNT} -lt $((${#ACTIONVALS[*]} - 1)) ]];do

            ENTRY_SRC[((++${#ENTRY_SRC[*]}))]=${ACTIONVALS[$COUNT]}

            COUNT=$(($COUNT + 1))

        done

        # Define target location.

        ENTRY_DST=$(cli_checkRepoDirTarget "${ACTIONVALS[((${#ACTIONVALS[*]} - 1))]}")

        # Define target documentation entry.

        ENTRY_DST=$(help_getEntry "$ENTRY_DST")

        # Redefine arguments to store source locations only.

        ARGUMENTS=${ENTRY_SRC[@]}

    elif [[ ${ACTIONNAM} == ${FUNCNAM}_renameEntry ]];then

        # When documentation entry is renamed, we need to restrict the

        # number of arguments to two arguments only.  More than two

        # arguments are useless since the renaming action works with

        # two arguments only. This is, the source location and the

        # target location.

        local ENTRY_SRC=''

        local ENTRY_DST=''

        # Verify number of arguments passed to centos-art.sh script.

        if [[ ${#ACTIONVALS[*]} -gt 2 ]];then

            cli_printMessage "`gettext "Only two arguments are accepted."`" 'AsErrorLine'

            cli_printMessage "${FUNCDIRNAME}" 'AsToKnowMoreLine'

        elif [[ ${#ACTIONVALS[*]} -lt 2 ]];then

            cli_printMessage "`gettext "Two arguments are required."`" 'AsErrorLine'

            cli_printMessage "${FUNCDIRNAME}" 'AsToKnowMoreLine'

        fi

        # Define source location. 

        ENTRY_SRC=${ACTIONVALS[0]}

        # Define target location.

        ENTRY_DST=$(cli_checkRepoDirTarget "${ACTIONVALS[1]}")

        # Define target documentation entry.

        ENTRY_DST=$(help_getEntry "${ACTIONVALS[1]}")

        # Redefine arguments to store source locations only.

        ARGUMENTS=$ENTRY_SRC

    else

        # Redefine arguments to store all arguments.

        ARGUMENTS=$@

    fi

    # Define action name. It does matter what option be passed to

    # centos-art, there are many different actions to perform based on

    # the option passed (e.g., `--edit', `--read', `--search', etc.).

    # In that sake, we defined action name inside help_getArguments,

    # at the moment of interpreting options.

    # Define action value. As convenction, we use non-option arguments

    # to define the action value (ACTIONVAL) variable.

    for ACTIONVAL in $ARGUMENTS;do

        # Check action value passed through the command-line using

        # source directory definition as reference.

        cli_checkRepoDirSource

        # Define documentation entry.

        ENTRY=$(help_getEntry)

        # Define documentation entry directory. This is the directory

        # where the entry file is stored.

        ENTRY_DIR=$(dirname ${ENTRY} | sed -r 's!\.texi$!!')

        # Define documentation entry file (without extension).

        ENTRY_FILE=$(basename ${ENTRY} | sed -r 's!\.texi$!!')

        # Define directory to store documentation entries.  At this

        # point, we need to take a desition about documentation

        # design, in order to answer the question: How do we assign

        # chapters, sections and subsections automatically, based on

        # the repository structure?  and also, how such design could

        # be adapted to changes in the repository structure?

        #

        # One solution would be: represent the repository's directory

        # structure as sections inside a chapter named `Directories'

        # or something similar. Subsections and subsubsections will

        # not have their own files, they all will be written inside

        # the same section file that represents the repository

        # documentation entry.

        MANUAL_CHAPTER_DIR=$(echo $ENTRY | cut -d / -f-7)

        # Define chapter name for the documentation entry we are

        # working with.

        MANUAL_CHAPTER_NAME=$(basename "$MANUAL_CHAPTER_DIR")

        # Set action preable.

        cli_printActionPreamble "${MANUAL_BASEFILE}.texi" '' ''

        # Syncronize changes between repository and working copy. At

        # this point, changes in the repository are merged in the

        # working copy and changes in the working copy committed up to

        # repository.

        cli_syncroRepoChanges ${MANUAL_CHAPTER_DIR}

        # Execute action name.

        if [[ $ACTIONNAM =~ "^${FUNCNAM}_[A-Za-z]+$" ]];then

            eval $ACTIONNAM

        else

            cli_printMessage "`gettext "A valid action is required."`" 'AsErrorLine'

            cli_printMessage "${FUNCDIRNAM}" 'AsToKnowMoreLine'

        fi

        # Commit changes from working copy to central repository only.

        # At this point, changes in the repository are not merged in

        # the working copy, but chages in the working copy do are

        # committed up to repository.

        cli_commitRepoChanges ${MANUAL_CHAPTER_DIR}

    done

}