Mongodb & php: how can I store and callback a custom js function to parse data?

Working with Data
,
1

The goal that I have is to implement a php class (through the MongoDB/Driver object) to handle the db connection, insert and truncate.

This is the class prepared (today):

class mongodb {
	private $mongo;
	/*
	 * Constructor to instantiat db connection
	 */
	function __construct($host) {
		$this->db = new MongoDB\Driver\Manager("mongodb://" . $host . "/");
	}
	/*
	 * Delete collection (upon $filter parameter);
	 */
	function delete($collection, $filter) {
		$bulk = new MongoDB\Driver\BulkWrite;
		$bulk->delete($filter);
		$result = $this->db->executeBulkWrite($collection, $bulk);
	}
	/*
	 * Insert dataset
	 */
	function insert($collection, $dataset) {
		$bulk = new MongoDB\Driver\BulkWrite;
		if (!is_array($dataset)) $dataset = (array) $dataset;
		foreach($dataset as $k => $ds) {
			$i = $bulk->insert($ds);
		}
		$result = $this->db->executeBulkWrite($collection, $bulk);
	}
	/*
	 * Insert js fx into db.system.js collection
	 */
	function insertfx($dataset) {
		$bulk = new MongoDB\Driver\BulkWrite;
		$i = $bulk->insert($dataset);
		$result = $this->db->executeBulkWrite("db.system.js", $bulk);
	}
}

If I run this code I don’t have any error…

$mongodb = new MongoDb("localhost:27017");
$dataset = [
	[
		'_id' => 23120378,
		'x_origin' => -80,
		'y_origin' => 101,
		'hard_bin_map' => 'FFFFAAAAFFFF|FFAA0101AAFF'
	],[
		'_id' => 23120379,
		'x_origin' => -80,
		'y_origin' => 101,
		'hard_bin_map' => 'FFFFAAAAFFFF|FFAA0203AAFF'
	]
];
/*
 * truncate & fill collection st.map
 */
$mongodb->delete("st.map", []);
$mongodb->insert("st.map", $dataset);
/*
 * clean + insert a js function into db.system.js
 */
$mongodb->delete("db.system.js", []);
$mongodb->insertfx(array(
	'_id' => "map2matrix",
	'value'	=> "function (inputmap, startx, starty, splitsize) {
		inputmap = inputmap.split(',');
		let y = starty;
		matrix = []
		inputmap.forEach((el) => {
			let columns = Math.ceil(el.length / splitsize);
			matrix[y] = [];
			x = startx;
			for (i = 0, o = 0; i < columns; ++i, o += splitsize) {
				matrix[y][x] = el.substr(o, splitsize);
				x++;
			}
			y++;
		});
		return(matrix);
	}"
));

but:
a) I can query st.map collection (through MongoDB Compass)
b) I cannot see db.system.js containing ‘map2matrix’

The goal, at the end (and I would appreciate if someone can support me on how to reach this goal) is to trigger fx map2matrix() passing as input

  1. st.map.hard_bin_map (ie: FFFFAAAAFFFF|FFAA0203AAFF)
  2. st.map.x_origin (ie: 101)
  3. st.map.y_origin (ie: -80)
  4. 2 (hardcoded split length)

The expected output has to be a matrix like this

	|	-80		-79		-78		-77		-76		-75
----+-----------------------------------------------
101	|	'FF'	'FF'	'AA'	'AA'	'FF'	'FF'
102	|	'FF'	'AA'	'01'	'01'	'AA'	'FF'

Is it correct that way that I use to store data and function?
How can I call fx map2matrix passing values stored on st.map collection?
type or paste code here