#!/bin/bash

#

# texinfo_updateStructureSection.sh -- This function looks for all

# section entry files inside manual's base directory and updates menu,

# nodes and cross references definitions for them all, one at a time.

#

# Copyright (C) 2009, 2010, 2011 The CentOS Project

#

# 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 texinfo_updateStructureSection {

    # Print action message. These actions might consume some time to

    # finish. The more section entries the regular expression pattern

    # matches, the more time it will take to finish.

    cli_printMessage "`gettext "Updating section menus, nodes and cross references"`" --as-banner-line

    local PATTERN=''

    local MANUAL_ENTRIES=''

    local ACTIONNAM_SECMENU=''

    local ACTIONNAM_CROSREF=''

    # Define regular expression pattern used to build the list of

    # section entries that will be processed.

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

        PATTERN="$1"

    else

        PATTERN="${MANUAL_ENTRY}"

    fi

    # Verify the pattern value considering both the chapter and

    # section names. This is required when no chapter or section name

    # is provided to `centos-art.sh' script, as non-option argument in

    # the command-line (e.g., `centos-art help --update-structure').

    if [[ $PATTERN =~ "${MANUAL_NAME}\.${MANUAL_EXTENSION}$" ]] \

        || [[ $PATTERN =~ "chapter\.${MANUAL_EXTENSION}$" ]];then

        PATTERN="$(dirname ${MANUAL_ENTRY})/.+\.${MANUAL_EXTENSION}"

    fi

    # Define action to perform on menu, nodes and cross references

    # definitions.

    case "$2" in 

        --delete )

            # Remove menu and node definitions for sections inside

            # manual, in order to reflect the changes.

            ACTIONNAM_SECMENU='updateSectionMenu --delete-entry'

            # Remove cross reference definitions inside manual

            # structure.

            ACTIONNAM_CROSREF='deleteCrossReferences'

            ;;

        --update | * )

            # Update menu and node definitions for sections inside

            # manual, in order to reflect the changes.

            ACTIONNAM_SECMENU='updateSectionMenu --add-entry'

            # Resotre cross reference definitions inside manual

            # structure.  If a documentation entry has been removed by

            # mistake and that mistake is later fixed by adding the

            # removed documentation entry back into the manual

            # structure, it is necessary to rebuild the missing cross

            # reference information inside the manual structure in

            # order to reactivate the removed cross refereces, as

            # well.

            ACTIONNAM_CROSREF='restoreCrossReferences'

            ;;

    esac

    # Define list of target entries using find's regular expression

    # pattern as reference. Notice that, when we update section

    # definition files, the files already exist in the working copy so

    # the pattern can be its absolute path without any problem. If the

    # pattern is built correctly, it will match the location and so be

    # returned to build the list of entries to process. Notice also

    # that, when updating, it is possible to use a regular expression

    # to match more than one location and build the list of entries

    # based on such matching.  In this last configuration, let you to

    # update menu, nodes and cross references to many section

    # definitions (i.e., all those section definition file that match

    # the pattern you specified). 

    MANUAL_ENTRIES=$(cli_getFilesList ${MANUAL_BASEDIR_L10N} \

        --pattern="${PATTERN}" | egrep -v "/(${MANUAL_NAME}|chapter)")

    # Verify list of target entries. Assuming is is empty,  define

    # list of target documentation entries using pattern as reference

    # instead.  When we delete a section entry from the working copy,

    # using find to retrive its path isn't possible because the

    # section definition file is removed before executing find and by

    # consequence no match is found.  This issue provokes no section

    # entry to be removed from menu, nodes and cross references. In

    # order to solve this, use the pattern value as list of target

    # entries.  Notice that, in this case, the pattern value must be

    # the absolute path to that documentation entry which doesn't

    # exist and we want to update menu, nodes and cross references

    # information for.

    if [[ $MANUAL_ENTRIES == '' ]] && [[ $PATTERN =~ '^[[:alnum:]./_-]+$' ]];then

        MANUAL_ENTRIES=${PATTERN}

    fi

    # Verify list of target entries. Assumming it is still empty,

    # there is nothing else to do here but printing an error message

    # describing the fact that no section entry was found to process.

    if [[ $MANUAL_ENTRIES == '' ]];then

        cli_printMessage "`gettext "No section entry found to process."`" --as-error-line

    fi

    # Loop through target documentation entries in order to update the

    # documentation structure (e.g., it is not enough with copying

    # documentation entry files, it is also needed to update menu,

    # nodes and related cross-references).

    for MANUAL_ENTRY in ${MANUAL_ENTRIES};do

        cli_printMessage "${MANUAL_ENTRY}" --as-response-line

        ${FLAG_BACKEND}_${ACTIONNAM_SECMENU}

        ${FLAG_BACKEND}_updateSectionNodes

        ${FLAG_BACKEND}_makeSeeAlso "${MANUAL_ENTRY}"

        ${FLAG_BACKEND}_${ACTIONNAM_CROSREF} "${MANUAL_ENTRY}"

    done

}