# Extract foreign keys from model definitions.
#
# This file is part of transport-accessibility.
# Copyright (C) 2024 Janek Kiljanski, Johannes Randerath
# 
# transport-accessibility 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 3 
# of the License, or (at your option) any later version.
# 
# transport-accessibility 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 transport-accessibility. 
# If not, see <https://www.gnu.org/licenses/>. 

BEGIN{
    classname = ""
    FS = "[ |(,]"
    printf "[\n"
}
{
    #print "1: "$1 " 2: "$2 " 3: "$3 " 4: "$4
    if ($1 == "class") {
        classname = $2
        printf "\t(pt_map.models." classname ", ["
    }else if ($0 == "" && classname != ""){
        printf "]),\n"
        classname = ""
    }else {
        fk = index($0, "models.ForeignKey")
        if (fk > 0) {
            first = match($0, /\(/)+1
            last = index(substr($0, first), ",")-1
            printf "(pt_map.models." substr($0, first, last) ", "
            first = match($0, /[a-z]/)          
            last = index(substr($0, first), " = ")-1
            printf "\'" substr($0, first, last) "\'), "
        }
    }
}
END{
    print "]"
}