User:Abel/WbProcessor.js

    // License: GPL
    // 
    function wbContainer( universe, location ) {

        this.main = interjson( checkdive( universe, location ));
        var container = this;

        this.checkentity = function ( rel_id_list, paths ) {
            var return_obj = [],
                temporary_obj = [],
                baseRelation;
            if ( Object.keys(rel_id_list).length > 0 ) {
                Object.keys(rel_id_list).forEach( function( item ){
                    temporary_obj = [];
                    baseRelation = checkdive( container.main, rel_id_list[item][0] );
                    rise( temporary_obj, depthdive( baseRelation, paths ));
                    if ( Object.keys(temporary_obj).length > 0 ) {
                        Object.keys(temporary_obj).forEach( function (hit) {
                            if ( temporary_obj[hit] == rel_id_list[item][1] ) {
                                return_obj.push(rel_id_list[item]);
                            }
                        });
                    } else if ( temporary_obj == rel_id_list[item][1] ) {
                        return_obj.push(rel_id_list[item]);
                    }
                });
            } 
            return return_obj;
        }

        // the list of private helper functions, could not be accessed from outside
        function indexinterpolate(obj,i) { return  (obj[i] != undefined) ? obj[i] : obj}; 
        // helper function for checking a part of an array exists
        function indexcheck(obj,i) {  return  (obj[i] != undefined) ? obj[i] : undefined };
        // dive selects matrix.a.b.c.d from the array called matrix and 'a.b.c.d' as string
        // if a.b.c.d does not exists, it returns the substructure until the substructure exists, if d does not exist, it returns matrix.a.b.c e.g.
        
        function dive(array, read){
            return read.split('.').reduce(indexinterpolate, array);
        }
        
        function check(array, read){
            if ( array != undefined ) {
                return read.split('.').reduce(indexcheck, array);
            }
        }
        
        function checkdive(array, read){
            if ( check(array, read) != undefined) {
                return dive(array, read);
            } else if ( Object.keys(array).length > 0 ) {
                return complexcheck( array, read );
            }
        }

        function complexcheck(array, read){
            var ret_obj;
            Object.keys(array).forEach( function(item){
                rise( ret_obj, checkdive(array[item], read)) ; 
            });
            return ret_obj;
        }

        function depthdive(array, read){
            var ret_obj,
                temp_obj = array;
            if ( Object.keys(read).length > 0 ) {
                Object.keys(read).forEach( function(path) {
                    temp_obj = checkdive(temp_obj, path);
                });
                rise(ret_obj, temp_obj);
                return ret_obj;
            } else {
                return checkdive(array, read);
            }
        }

        function rise(array, to_push) {
            if ( to_push != undefined) {
                if ( Object.keys(to_push).length > 0 ){
                    Object.keys(to_push).forEach( function(item){
                        if ( array != undefined ) {
                            array.push(to_push[item]);
                        }
                    });
                } else {
                    array.push(to_push);
                }
            }
        }

        function interjson( obj ) {
            try {
                return JSON.parse( obj )
            } catch (e) {
            // if not JSON, do silly things
                console.log('not a json ¯\_(ツ)_/¯');
            };
        } 
        
    }