<?php

if (isset($_GET['db'])) {

    $postgres_host = 'localhost';
    $postgres_dbname = 'gisdata';
    $postgres_dbtable = 'data_domains';
    $postgres_user = 'postgres';
    $postgres_password = 'postgres';

    $sqlite_dbname = 'fielddomains.db';
    $sqlite_table = 'data_domains';

    if ($_GET['db'] == 'postgres') {

        $dbconn = pg_connect("host=" . $postgres_host . " dbname=" . $postgres_dbname . " user=" . $postgres_user . " password=" . $postgres_password) or die('Could not connect: ' . pg_last_error());

        $query = 'SELECT * FROM ' . $postgres_dbtable . ' ORDER BY domain_name ASC ';
        $result = pg_query($query) or die('Query failed: ' . pg_last_error());

        $objects0 = json_encode(pg_fetch_all($result));

        $objects = json_decode($objects0);

        $grouped = array();

        // Loop JSON objects
        foreach ($objects as $object) {

            if (!array_key_exists($object->domain_id, $grouped)) { // a new ID...

                $newObject = new stdClass();

                // Copy the ID/ID_NAME, and create an ITEMS placeholder
                $newObject->_domain_id = $object->domain_id;
                $newObject->_service_url = $object->service_url;
                $newObject->_layer_name = $object->layer_name;
                $newObject->_field_name = $object->field_name;
                $newObject->_field_domain = array();

                // Save this new object
                $grouped[$object->domain_id] = $newObject;
            }

            $taskObject = new stdClass();

            // Copy the TASK/TASK_NAME
            $taskObject->name = $object->domain_name;
            $taskObject->value = $object->domain_value;


            // Append this new task to the ITEMS array
            $grouped[$object->domain_id]->_field_domain[] = $taskObject;

        }

        // We use array_values() to remove the keys used to identify similar objects
        // And then re-encode this data :)
        $grouped = array_values($grouped);
        $json = json_encode($grouped);

        echo $json;

        pg_free_result($result);

        pg_close($dbconn);

    }

    if ($_GET['db'] == 'sqlite') {

        $sqlite_db = new PDO('sqlite:' . $sqlite_dbname);

        $objects = $sqlite_db->query("SELECT * FROM " . $sqlite_table . ' ORDER BY domain_name ASC ');

        $grouped = array();

        // Loop JSON objects
        foreach ($objects as $object) {

            if (!array_key_exists($object['domain_id'], $grouped)) { // a new ID...

                $newObject = new stdClass();

                // Copy the ID/ID_NAME, and create an ITEMS placeholder
                $newObject->_domain_id = $object['domain_id'];
                $newObject->_service_url = $object['service_url'];
                $newObject->_layer_name = $object['layer_name'];
                $newObject->_field_name = $object['field_name'];
                $newObject->_field_domain = array();

                // Save this new object
                $grouped[$object['domain_id']] = $newObject;
            }

            $taskObject = new stdClass();

            // Copy the TASK/TASK_NAME
            $taskObject->name = $object['domain_name'];
            $taskObject->value = $object['domain_value'];


            // Append this new task to the ITEMS array
            $grouped[$object['domain_id']]->_field_domain[] = $taskObject;

        }

        // We use array_values() to remove the keys used to identify similar objects
        // And then re-encode this data :)
        $grouped = array_values($grouped);
        $json = json_encode($grouped);

        echo $json;

        // Close file db connection
        $sqlite_db = null;

    }


}