#!/bin/zsh -f
# packaging, library.org
LIBRARYFILE=~/.library/library.rec
LIBRARYDIRECTORY=~/.library
GIT=detect

# help-message, /home/swflint/.library/library.org
if [[ $# -eq 0 ]] ; then
    echo "library [ help | query query-expressions | add | emacs | git [ other-args ] | bulk-add number | report [ name | list | new name ] | edit id field [ value ] | init ]"
    exit
fi

function display-help {
    cat <<EOF
library [ help | query query-expressions | add | emacs | git [ other-args ] | bulk-add number | report [ name | list | new name ] | edit id field [ value ] | init ]

help:     Display this help message.
query:    Query Library Database.
add:      Add a singular book record.
emacs:    View records in emacs.
edit:     Edit the value of a specified field in a specified record.
git:      Run a git command.
report:   Run a report.
init:     Initialize the database.
bulk-add: Add a specified number of records.
EOF
}
# help-message ends here

# handle-reports, /home/swflint/.library/library.org
function do-report {
    NAME=$1
    shift
    case ${NAME} in
        list)
            for report in ${LIBRARYDIRECTORY}/*.report ;
            do
                echo " - $(basename -- ${report} .report)"
            done
        ;;
        new)
            REPORT=$1
            shift
            echo "# -*- mode: sh-script -*-" > ${LIBRARYDIRECTORY}/${REPORT}.report
            emacsclient --alternate-editor="" -n ${LIBRARYDIRECTORY}/${REPORT}.report
        ;;
        *)
            if [[ -e ${LIBRARYDIRECTORY}/${NAME}.report ]] ; then
               sh ${LIBRARYDIRECTORY}/${NAME}.report $@
            fi
    esac
}
# handle-reports ends here

# handle-git, /home/swflint/.library/library.org
function do-git {
    FIRST=$1
    if [[ $FIRST == "init" ]] ; then
        OLD=`pwd`
        cd ${LIBRARYDIRECTORY}
        git $@
        cd ${OLD}
    else
        if [[ $GIT == "detect" ]] ; then
            OLD=`pwd`
            cd ${LIBRARYDIRECTORY}
            git $@
            cd ${OLD}
        fi
    fi
}
# handle-git ends here

# handle-query, /home/swflint/.library/library.org
function run-query {
    recsel -t Book $@ ${LIBRARYFILE}
}
# handle-query ends here

# add-book, /home/swflint/.library/library.org
function add-single {
    echo -n "Title: "
    read TITLE
    echo -n "Author: "
    read AUTHOR
    echo -n "LCCN: "
    read LCCN
    echo -n "Copyright: "
    read COPYRIGHT
    echo -n "Publisher: "
    read PUBLISHER
    echo -n "ISBN: "
    read ISBN
    echo -n "Location: "
    read LOCATION
    recins -t Book \
           -f Title -v "${TITLE}" \
           -f Author -v "${AUTHOR}" \
           -f LCCN -v "${LCCN}" \
           -f Copyright -v "${COPYRIGHT}" \
           -f Publisher -v "${PUBLISHER}" \
           -f ISBN -v "${ISBN}" \
           -f Location -v "${LOCATION}" \
           ${LIBRARYFILE}
    do-git add `basename ${LIBRARYFILE}`
    do-git commit -m "Added record for \"${TITLE}\""
}
# add-book ends here

# add-in-bulk, /home/swflint/.library/library.org
function bulk-add {
    GITOLD=${GIT}
    GIT=FALSE
    for i in {1..$1} ; do
        echo "Adding book number ${i}"
        add-single
    done
    GIT=${GITOLD}
    do-git add `basename ${LIBRARYFILE}`
    do-git commit -m "Added ${1} records"
}
# add-in-bulk ends here

# edit-field, /home/swflint/.library/library.org
function do-edit {
    ID=$1
    shift
    FIELD=$1
    shift

    if [[ $FIELD = "Withdrawn" ]] ; then
        recins -e "ID = ${ID}" \
               -f "Withdrawn" -v `date "%a, %d %b %Y %H:%M:%S %z"` \
               ${LIBRARYFILE}
    else
        VALUE=$1
        shift
        recins -e "ID = ${ID}" \
               -f "${FIELD}" -v "${VALUE}" \
               ${LIBRARYFILE}
    fi
    do-git add `basename ${LIBRARYFILE}`
    do-git commit -m "Edited record id ${ID}"
}
# edit-field ends here

# initialize-database, /home/swflint/.library/library.org
function initialize {
    OLD=`pwd`
    mkdir -p ${LIBRARYDIRECTORY}
    cd ${LIBRARYDIRECTORY}
    [[ -ne `basename ${LIBRARYFILE}` ]] && \
        cat <<EOF > `basename ${LIBRARYFILE}`
# file-format, /home/swflint/.library/library.org
# -*- mode: rec -*-

%rec: Book
%doc: Foo
%key: ID
%unique: Title
%type: ID int
%type: Title line
%type: Author line
%type: LCCN line
%type: ISBN regexp /[0-9]*X?/
%type: Publisher line
%type: Copyright int
%type: Location line
%type: Inserted date
%mandatory: Title Author LCCN Inserted
%allowed: ISBN Publisher Copyright Location
%auto: ID Inserted
# file-format ends here
EOF
}
# initialize-database ends here

# view-in-emacs, /home/swflint/.library/library.org
function view-in-emacs {
    emacsclient --alternate-editor="" -n ${LIBRARYFILE}
}
# view-in-emacs ends here

# process-commands, /home/swflint/.library/library.org
COMMAND=$1
shift

case ${COMMAND} in
    help)
        display-help
        exit
        ;;
    query)
        run-query $@
        exit
        ;;
    add)
        add-single
        exit
        ;;
    git)
        do-git $@
        exit
        ;;
    bulk-add)
        bulk-add $@
        exit
        ;;
    report)
        do-report $@
        exit
        ;;
    emacs)
        view-in-emacs
        exit
        ;;
    edit)
        do-edit $@
        exit
        ;;
    init)
        initialize
        exit
        ;;
    *)
        display-help
        exit
esac
# process-commands ends here
# packaging ends here