#!/bin/bash

set -e

declare -A data=(

        [/sim/description]=text

        [/sim/long-description]=text

        [/sim/author]=text

        [/sim/flight-model]=text

        [/sim/type]=text

        [/sim/model/path]=text

)

fgaddon_svn=https://svn.code.sf.net/p/flightgear/fgaddon/trunk/Aircraft

fgaddon_path=$HOME/.fgfs/flightgear-fgaddon/Aircraft

database=${DB:-$0.db}

#locale=fr

test -r "$0.conf" && source $0.conf && echo config red

aircrafts=$(mktemp --dry-run /dev/shm/Aircraft-XXXXXXXXX)

aircraft=$(mktemp --dry-run /dev/shm/aircraft-XXXXXXX)

setxml=$(mktemp --dry-run /dev/shm/setxml-XXXXXXXX)

in_ram_database=$(mktemp --dry-run /dev/shm/XXXXXXX)

function xmlgetnext () {

    local IFS='>'

    read -d '<' TAG VALUE

    # by design, the first TAG/VALUE pair is empty

    # to avoid infinite loops at end of file parsing we return an error

    # the next time we find an empty TAG

    if test -z "$TAG"; then

        test ${xmlgetnext_firstentry:-1} -eq 1 && xmlgetnext_firstentry=0 || return 1;

    fi

    # process $TAG only if necessary

    local _TAG=$(printf '%q' $TAG)

    if test ${_TAG:0:1} = '$'; then

        TAG=$(tr '\n' ' ' <<< $TAG | sed 's/  */ /g; s/ *$//')

    fi

}

rm -f /dev/shm/sqlite_request

function sqlite_request () {

    local delimiter=';'

    test ${1:0:1} == '.' && delimiter=''

    echo "${1}${delimiter}" >> /dev/shm/sqlite_request

    if ! sqlite3 "$in_ram_database" <<< "$1"; then

        register_state

    fi

}

function xmlremovecomments () {

    sed -ri 's/<(!--|script>)/\n&/;s/(<\/script|--)>/&\n/' $setxml

    sed -ri '/<(script>|!--).*(<\/script|--)>/d;/<(script>|!--)/,/(<\/script|--)>/d' $setxml

    sed -i 's/\xef\xbb\xbf//' $setxml # removes BOM

}

function trap_break () {

    trap '' INT

    echo "stop requested"

    register_state

}

function trap_exit () {

    trapped_rc=$?

    trap '' INT

    rm -f $aircrafts $aircraft $setxml

    if test ! -e $in_ram_database; then

        exit

    fi

    test $trapped_rc -ne 0 && register_state

    echo "updating installation status"

    for ac in $(sqlite_request 'select printf("%i:%s/%s", aircrafts.id, aircrafts.name, setxml.file)

                                from aircrafts inner join setxml

                                where aircrafts.id = setxml.variantof and setxml.installed != 0;'); do

        ac_path=${ac#*:}

        if test ! -e $fgaddon_path/$ac_path-set.xml; then

            sqlite_request "update setxml set installed = 0 where file = '${ac_path#*/}' and variantof = ${ac%:*}"

        fi

    done

    for ac in $fgaddon_path/*/*-set.xml; do

        ac=${ac/$fgaddon_path}

        sx=${ac##*/}

        ac=${ac%/*}

        if test -d $fgaddon_path/$ac/.svn; then

            install_type=1

        elif test -d $fgaddon_path/$ac/.git; then

            install_type=2

        else

            install_type=3

        fi

        sqlite_request "update setxml set installed = $install_type

                        where exists (

                            select 1

                            from aircrafts

                            where name = '${ac/\/}' and setxml.variantof = id

                        )"

    done

    missing_setxml=$(sqlite_request "select printf(' - %s', name) from aircrafts where id not in (select variantof from setxml)")

    if test -n "$missing_setxml"; then

        echo -e "missing setxml config for :\n$missing_setxml"

    fi

    if test -r "$database" && md5sum $in_ram_database | sed "s,$in_ram_database,$database," | md5sum --status -c -; then

        rm -f $in_ram_database

        echo "no changes in $database"

    elif test -w "$database"; then

        sqlite_request "vacuum"

        mv -f $in_ram_database "$database"

        echo "database $database updated"

    elif ! test -e "$database"; then

        mv $in_ram_database "$database"

        echo "database $database created"

    else

        rm -f $in_ram_database

        echo "nothing can be done with $database !"

    fi

}

function register_state () {

    sqlite_request "drop table if exists recover_rev"

    sqlite_request "create table recover_rev (

                        revkey text,

                        revision integer,

                        revauthor text,

                        revdate integer

                    )"

    for revkey in ${!revindex[@]}; do

        sqlite_request "insert into recover_rev values (

                            '$revkey',

                            ${revindex[$revkey]:-0},

                            '${revauthor[$revkey]}',

                            ${revdate[$revkey]:-0}

                        )"

    done

    sqlite_request "drop table if exists recover_setxmlmodified"

    sqlite_request "create table if not exists recover_setxmlmodified (

                        sx text

                    )"

    for sx in ${!setxmlmodified[@]}; do

        sqlite_request "insert into recover_setxmlmodified values (

                            '$sx'

                        )"

    done

    exit

}

function update_database () {

    echo "[ ${#revindex[@]} ] ${ac:1}"

    dbupdate=$(sqlite_request "select revision from aircrafts where name is '${ac:1}'")

    if test -z "$dbupdate"; then

        sqlite_request "insert into aircrafts (name, revision, date, author)

                        values ('${ac:1}', ${revindex[$ac]}, ${revdate[$ac]}, '${revauthor[$ac]}')"

    elif test $dbupdate -lt ${revindex[$ac]}; then

        sqlite_request "update aircrafts set

                            revision = ${revindex[$ac]},

                            author   = '${revauthor[$ac]}',

                            date = ${revdate[$ac]}

                        where name is '${ac:1}'"

    fi

    id=$(sqlite_request "select id from aircrafts where name is '${ac:1}'")

    for sx in ${!setxmlmodified[@]}; do

        unset include include_rootpath

        [[ "$sx" =~ ^"${ac:1}/" ]] || continue

        for col in ${!data[@]}; do

            data[$col]=

        done

        sx=${sx#*/}

        echo " -> $sx"

        if ! svn export --quiet --force $fgaddon_svn/${ac:1}/$sx-set.xml $setxml; then

            register_state

        fi

        xmlremovecomments

        unset xmlgetnext_firstentry property

        while xmlgetnext; do

            case "${TAG:0:1}" in

                ''|'?'|'!')

                    continue;;

                /)

                    property=${property%/*};;

                *)

                    if test "${TAG: -1}" != '/'; then

                        property+=/${TAG%% *}

                    fi;;

#                    property+=/${TAG%% *}

#                    if test "${TAG: -1}" = '/'; then

#                        _TAG=${TAG:0:-1}

#                        test "${_TAG#* }" != "${_TAG}" && eval "${_TAG#* }"

#                        property=${property%/*}

#                    fi;;

            esac

            if [[ "$TAG" =~ ^"PropertyList include=" ]]; then

                include_rootpath=${include%/*}

                test $include = $include_rootpath && unset include_rootpath

                eval $(echo ${TAG#* })

                [[ "$include" =~ ^Aircraft/Generic/ ]] && unset include include_rootpath && continue

                if [[ "$include" =~ ^'../' ]]; then

                    if test -n "$include_rootpath"; then

                        if [[ "$include_rootpath" =~ '/' ]]; then

                            include_rootpath=${include_rootpath%/*}

                        else

                            unset include_rootpath

                        fi

                    else

                        ac_save=$ac

                        unset ac

                    fi

                    include=${include/\.\.\/}

                fi

                if ! svn cat $fgaddon_svn/${ac:1}/${include_rootpath:+$include_rootpath/}$include >> $setxml; then

                    register_state

                fi

                xmlremovecomments

            fi

            if [[ "$property" = /PropertyList@($data_pattern) ]]; then

                if test -z "${data[${property/\/PropertyList}]}"; then

                    eval "data[${property/\/PropertyList}]=\"${VALUE//\"/\\\"}\""

                    data[${property/\/PropertyList}]=$(tr '\n' ' ' <<< ${data[${property/\/PropertyList}]} | sed -r 's/^\s*//;s/\s+/ /g;s/\s*$//')

                fi

            fi

#            if test -n "$_TAG"; then

#                # _TAG non-null means xml props ends with /

#                # need to go back of last property

#                property=${property/%\/${_TAG%% *}}

#                unset _TAG

#            fi

            # continue parsing (while loop) until everything's found

            for col in ${!data[@]}; do

                test -z "${data[$col]}" && continue 2

            done

            break # everything's found

        done < $setxml

        if eval "test -z \"$data_test_null\""; then

            echo "WARNING: no info found, skipping"

            continue

        fi

        known=$(sqlite_request "select variantof from setxml where file is '$sx'")

        if test -n "$known"; then

            for col in ${!data[@]}; do

                dbvalue=$(sqlite_request "select '$col'

                                          from setxml

                                          where file is '$sx' and variantof = $known")

                if test "$dbvalue" != "${data[$col]}" -a -n "${data[$col]}"; then

                    sqlite_request "update setxml

                                    set '$col' = '${data[$col]//\'/\'\'}'

                                    where file is '$sx' and variantof = $known"

                fi

            done

        else

            values="'$sx', $id, "

            for col in ${!data[@]}; do

                values+="'${data[$col]//\'/\'\'}', "

            done

            values+=0

            sqlite_request "insert into setxml values ($values)"

        fi

        test -n "$ac_save" && ac=$ac_save

        unset setxmlmodified[${ac:1}/$sx]

    done

    unset revindex[$ac]

}

function apply_revision () {

    for ac in "${!revindex[@]}"; do

        update_database

        if test -d $fgaddon_path/${ac:1}/.svn \

        && test "$(svn info --show-item=url $fgaddon_path/${ac:1})" != "$fgaddon_svn/${ac:1}" \

        || test -d $fgaddon_path/${ac:1} -a ! -d $fgaddon_path/${ac:1}/.svn; then

            echo "INFO: local ${ac:1} installed out from repo" >&2

        fi

    done

}

trap trap_break INT

trap trap_exit EXIT

stty -echoctl

declare -A revindex revauthor revdate setxmlmodified files revpath

data_pattern=$(printf "%s|" ${!data[@]})

data_pattern=${data_pattern:0:-1}

data_test_null=$(printf '${data[%s]}' ${!data[@]})

if test -e $database; then

    cp $database $in_ram_database

    sql_cols=$(sqlite_request "pragma table_info(setxml)" | awk -F'|' '{printf("%s %s ", $2, $3)}')

    script_cols="file text variantof integer "

    for col in ${!data[@]}; do

        script_cols+="$col ${data["$col"]} "

    done

    script_cols+="installed integer " # last space is important

    if test "$sql_cols" != "$script_cols"; then

        echo "ALERT: datbase version mismatch !"

        exit 1

    fi

    if sqlite_request '.tables' | grep -q 'recover_' && test -z "$1"; then

        echo "recovering from previous saved state"

        eval $(sqlite_request "select printf('revindex[%s]=%u;revauthor[%s]=%s;revdate[%s]=%u;',

                                       revkey, revision,

                                       revkey, revauthor,

                                       revkey, revdate)

                               from recover_rev")

        eval $(sqlite_request "select printf('setxmlmodified[%s]=1;', sx)

                               from recover_setxmlmodified")

        sqlite_request "drop table recover_rev"

        sqlite_request "drop table recover_setxmlmodified"

        apply_revision

        exit

    fi

fi

sqlite_request "create table if not exists aircrafts (

                    id integer primary key,

                    name text,

                    revision integer,

                    date integer,

                    author text)"

sqlite_request "create table if not exists setxml (

                    file text,

                    variantof integer,

                    $(for col in ${!data[@]}; do printf "'%s' %s, " $col ${data[$col]}; done)

                    installed integer)"

latest_revision=$(( $(sqlite_request "select max(revision) from aircrafts") + 1 ))

# for debugging purpose

if test -n "$2"; then

    ac=_${1%/*}

    revindex[$ac]=1

    revdate[$ac]=0

    revauthor[$ac]=foobar

    setxmlmodified[${ac:1}/${1#*/}]=1

    set -x

    update_database

    set +x

    exit

elif test -n "$1"; then

    ac=_${1%/*}

    eval $(sqlite_request "select printf('revindex[_%s]=%s;revdate[_%s]=%i;revauthor[_%s]=%s;',

                                            name, revision,

                                            name, date,

                                            name, author)

                           from aircrafts

                           where name = '${ac:1}'")

    setxmlmodified[${ac:1}/${1#*/}]=1

    if test -z "${revindex[$ac]}"; then

        echo "aircraft ${ac:1} not found"

        rm $in_ram_database

        exit

    fi

    update_database

    exit

fi

echo "downloading FGADDON history from revision ${latest_revision:-0}"

svn log --revision ${latest_revision:-0}:HEAD --xml --verbose $fgaddon_svn > $aircrafts

total=$(grep -c '<logentry' $aircrafts)

progress=0

echo parsing history

while xmlgetnext; do

    case "$TAG" in

        'logentry revision='*)

            eval $(echo ${TAG#* })

            for action in ${!revpath[@]}; do

                unset revpath[$action]

            done

        ;;

        'author')

            revauthor=${VALUE//\'/\'\'}

        ;;

        'date')

            revdate=$(date +%s -d "$VALUE")

        ;;

        'path '*)

            TAG=${TAG#* }

            TAG=${TAG// /;}

            TAG=${TAG//-/_}

            eval $(echo ${TAG// /;})

            path=(${VALUE//\// })

            if test $kind = 'file' -a ${#path[@]} -gt 3; then

                revpath[$action]+="$VALUE "

            elif test $kind = 'dir' -a ${#path[@]} -eq 3 -a $action = 'D'; then

                files[_${path[2]}]=0

                unset revindex[_${path[2]}] revauthor[_${path[2]}] revdate[_${path[2]}]

                for sx in ${!setxmlmodified[@]}; do

                    [[ "$sx" =~ "${path[2]}/" ]] && unset setxmlmodified[$sx]

                done

            fi

        ;;

        '/logentry')

            for item in ${revpath[D]}; do

                path=(${item//\// })

                if [[ "${path[3]}" =~ "-set.xml" ]]; then

                    unset setxmlmodified[${path[2]}/${path[3]/-set.xml}]

                    sqlite_request "delete from setxml where file = '${path[3]/-set.xml}'"

                fi

                files[_${path[2]}]=$(( --files[_${path[2]}] ))

                if test ${files[_${path[2]}]} -le 0; then

                    unset revindex[_${path[2]}] revauthor[_${path[2]}] revdate[_${path[2]}]

                    sqlite_request "delete from aircrafts where name = '${path[2]}'"

                fi

            done

            for action in A M R; do

                for item in ${revpath[$action]}; do

                    path=(${item//\// })

                    revindex[_${path[2]}]=$revision

                    revauthor[_${path[2]}]=$revauthor

                    revdate[_${path[2]}]=$revdate

                    [[ "${path[3]}" =~ "-set.xml" ]] && setxmlmodified[${path[2]}/${path[3]/-set.xml}]=1

                    test $action = 'A' && files[_${path[2]}]=$(( ++files[_${path[2]}] ))

                done

            done

            newprogress=$((++logentry * 100 / $total))

            if test $(( $newprogress - $progress )) -ge ${progress_granularity:-1}; then

                progress=$newprogress

                echo "$progress% (${#revindex[@]})"

            fi

        ;;

        '/log')

            apply_revision

            break

        ;;

    esac

done < $aircrafts