#!/bin/bash

#

# help.sh -- This function initializes the interface used by

# centos-art.sh script to perform documentation tasks through

# different documentation backends.

#

# 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 help {

    # Initialize action name with an empty value.

    local ACTIONNAM=''

    # Initialize search option (`--search'). This option is used to

    # look for documentation inside documentation backends.

    local FLAG_SEARCH=""

    # Initialize the backend flag (`--backend'). This option sets the

    # documentation backed used to perform documentation actions.

    local FLAG_BACKEND='texinfo'

    # Initialize manual's language.

    local MANUAL_L10N=$(cli_getCurrentLocale)

    # Initialize manuals's top-level directory. This is the place

    # where the manual will be stored in. To provide flexibility, the

    # current directory where the `centos-art.sh' script was called

    # from is used as manual's top-level directory.  Notice that this

    # relaxation is required because we need to create/maintain

    # manuals both under `trunk/Manuals/' and `branches/Manuals/'

    # directories.

    local MANUAL_TLDIR=${PWD}

    # Verify manual's top-level directory. To prevent messing the

    # things up, we need to restrict the possible locations

    # documentation manuals can be created inside the working copy.

    # When manual's top-level location is other but the ones

    # permitted, use `trunk/Manuals' directory structure as default

    # location to store documentation manuals.

    if [[ ! $MANUAL_TLDIR =~ "^${HOME}/artwork/(trunk/Manuals|branches/Manuals/[[:alnum:]-]+)" ]];then

        MANUAL_TLDIR="${HOME}/artwork/trunk/Manuals"

    fi

    # Initialize arrays related to documentation entries. Arrays

    # defined here contain all the information needed to process

    # documentation entries written in texinfo format.

    local -a MANUAL_SLFN

    local -a MANUAL_DIRN

    local -a MANUAL_CHAN

    local -a MANUAL_SECN

    # Initialize counter of non-option arguments.

    local MANUAL_DOCENTRY_COUNT=0

    local MANUAL_DOCENTRY_ID=0

    # Interpret option arguments passed through the command-line.

    ${FUNCNAM}_getOptions

    # Redefine arrays related to documentation entries using

    # non-option arguments passed through the command-line. At this

    # point all options have been removed from ARGUMENTS and

    # non-option arguments remain. Evaluate ARGUMENTS to retrive the

    # information related documentation entries from there.

    ${FUNCNAM}_getEntries

    # Initialize backend functionalities. At this point we load all

    # functionalities required into the centos-art.sh's execution

    # environment and make them available, this way, to perform

    # backend-specific documentation tasks.

    cli_exportFunctions "${FUNCDIR}/${FUNCDIRNAM}/$(cli_getRepoName \

        ${FLAG_BACKEND} -d)" "${FLAG_BACKEND}"

    # Execute backend-specific documentation tasks for each

    # documentation entry specified in the command-line, individually.

    # Notice that we've stored all documentation entries passed as

    # non-option arguments in array variables in order to process them

    # now, one by one.  This is particularily useful when we need to

    # reach items in the array beyond the current iteration cycle. For

    # example, when we perform actions that require source and target

    # locations (e.g., copying and renaming): we use the current value

    # as source location and the second value in the array as target

    # location; both defined from the first iteration cycle.

    while [[ $MANUAL_DOCENTRY_ID -lt $MANUAL_DOCENTRY_COUNT ]];do

        # Define name used by manual's main definition file.

        MANUAL_NAME=${MANUAL_SLFN[${MANUAL_DOCENTRY_ID}]}

        # Define absolute path to directory holding language-specific

        # directories.

        MANUAL_BASEDIR="${MANUAL_TLDIR}/${MANUAL_DIRN[${MANUAL_DOCENTRY_ID}]}"

        # Define absolute path to directory holding language-specific

        # texinfo source files.

        MANUAL_BASEDIR_L10N="${MANUAL_BASEDIR}/${MANUAL_L10N}"

        # Define absolute path to changed directories inside the

        # manual. For example, when a section entry is edited, copied

        # or renamed inside  the same manual there is only one

        # aboslute path to changed directory to look for changes, the

        # one holding the section entry.  However, when a manual entry

        # is renamed, there are two different locations to look for

        # changes, the source manual removed and the target manual

        # added.

        MANUAL_CHANGED_DIRS="${MANUAL_BASEDIR_L10N}"

        # 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. Notice that, because we are processing

        # non-option arguments one by one, there is no need to

        # sycronize changes to the same manual time after time

        # (assuming all documentation entries passed as non-option

        # arguments refer the same manual directory name).

        if [[ ${MANUAL_DOCENTRY_ID} -eq 0 \

            || ( ( ${MANUAL_DOCENTRY_ID} -gt 0 ) && ( \

            ${MANUAL_DIRN[${MANUAL_DOCENTRY_ID}]} != ${MANUAL_DIRN[((${MANUAL_DOCENTRY_ID} - 1))]} ) ) ]];then

            cli_syncroRepoChanges ${MANUAL_CHANGED_DIRS}

        fi

        # Define absolute path to base file. This is the main file

        # name (without extension) we use as reference to build output

        # files in different formats (.info, .pdf, .xml, etc.).

        MANUAL_BASEFILE="${MANUAL_BASEDIR_L10N}/${MANUAL_NAME}"

        # Define chapter name.

        MANUAL_CHAPTER_NAME=${MANUAL_CHAN[${MANUAL_DOCENTRY_ID}]}

        # Define section name.

        MANUAL_SECTION_NAME=${MANUAL_SECN[${MANUAL_DOCENTRY_ID}]}

        # Execute backend-specific documentation tasks.

        ${FLAG_BACKEND}

        # Increment documentation entry counter id.

        MANUAL_DOCENTRY_ID=$(($MANUAL_DOCENTRY_ID + 1))

    done

    # Rebuild output files to propagate recent changes.

    ${FLAG_BACKEND}_updateOutputFiles

    # 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_CHANGED_DIRS}

}