#!/bin/bash

MAINTDBDIR="<%= scope.lookupvar('buildsystem::var::maintdb::dbdir') %>"

function checkname()
{
    if [ -z "$1" ] ||
        echo "$1" | grep -q '[/*{}%]' ||
        echo "$1" | fgrep -q '..'
    then
        echo "Error: invalid package name." >&2
        exit 1
    fi
}

function maintnew()
{
    if [ "$user" != "root" ]; then
        echo "Error: new is only allowed to root." >&2
        exit 1
    fi
    checkname "$1"
    maintfile="$MAINTDBDIR/$1"
    if [ -f "$maintfile" ]; then
        exit 0
    fi
    echo "$2" > "$maintfile"
}

function maintset()
{
    checkname "$1"
    maintfile="$MAINTDBDIR/$1"
    newmaint="$2"
    if [ ! -f "$maintfile" ]; then
        echo "Error: package $1 does not exist in maintdb." >&2
        exit 1
    fi
    curmaint=$(cat "$maintfile")
    if [ "$newmaint" = "nobody" ]; then
        if [ "$curmaint" = "$user" ]; then
            echo "$newmaint" > "$maintfile"
            exit 0
        else
            echo "Error: cannot set maintainer for $1." >&2
            exit 1
        fi
    elif [ "$newmaint" = "$user" ]; then
        if [ "$curmaint" = "nobody" ]; then
            echo "$newmaint" > "$maintfile"
            exit 0
        else
            echo "Error: cannot set maintainer for $1." >&2
            exit 1
        fi
    else
        echo "Error: cannot set someone else as maintainer." >&2
        exit 1
    fi
}

function maintgetall()
{
    cd "$MAINTDBDIR"
    for file in *; do
        echo "$file $(cat $file)"
    done
    exit 0
}

function maintget()
{
    if [ -z "$1" ]; then
        maintgetall
    fi
    checkname "$1"
    maintfile="$MAINTDBDIR/$1"
    if [ -f "$maintfile" ]; then
        cat "$maintfile"
    else
        echo "Error: package $1 does not exist in maintdb." >&2
        exit 1
    fi
}

user="$1"
action="$2"

if [ "$action" = "new" ]; then
    maintnew "$3" "$4"
elif [ "$action" = "set" ]; then
    maintset "$3" "$4"
elif [ "$action" = "get" ]; then
    maintget "$3"
else
    echo "Error: unknown command." >&2
    exit 2
fi