Function EvaluateRedactArray

pg_documentdb/src/aggregation/bson_project.c:1474–1511

* Handles the projection of an array field for the $redact stage. * There is a recursive call to EvaluateRedactDocument for nested * documents and recursive calls to EvaluateRedactArray for nested arrays. */

 * documents and recursive calls to EvaluateRedactArray for nested arrays.
 */
static void
EvaluateRedactArray(const bson_value_t *array, const BsonReplaceRootRedactState *state,
					pgbson_array_writer *array_Writer)
{
	/* recursively evaluate nested documents in array */
	bson_iter_t arrayIter;
	BsonValueInitIterator(array, &arrayIter);

	while (bson_iter_next(&arrayIter))
	{
		const bson_value_t *arrayElement = bson_iter_value(
			&arrayIter);
		if (BSON_ITER_HOLDS_DOCUMENT(&arrayIter))
		{
			bool shouldPrune = false;
			pgbson *nestedDocument = EvaluateRedactDocument(
				PgbsonInitFromDocumentBsonValue(arrayElement), state, &shouldPrune);
			if (!shouldPrune)
			{
				PgbsonArrayWriterWriteDocument(array_Writer,
											   nestedDocument);
			}
		}
		else if (BSON_ITER_HOLDS_ARRAY(&arrayIter))
		{
			pgbson_array_writer child_array_writer;
			PgbsonArrayWriterStartArray(array_Writer,
										&child_array_writer);
			EvaluateRedactArray(arrayElement, state, &child_array_writer);
			PgbsonArrayWriterEndArray(array_Writer, &child_array_writer);
		}
		else
		{
			PgbsonArrayWriterWriteValue(array_Writer,
										arrayElement);
		}
	}
}


/*