1 files changed, 105 insertions, 0 deletions
diff --git a/lib/classes/JsonApi/Routes/Consultations/SlotCreationCount.php b/lib/classes/JsonApi/Routes/Consultations/SlotCreationCount.php
new file mode 100644
index 0000000..c378771
--- /dev/null
+++ b/lib/classes/JsonApi/Routes/Consultations/SlotCreationCount.php
@@ -0,0 +1,105 @@
+<?php
+namespace JsonApi\Routes\Consultations;
+
+use ConsultationBlock;
+use JsonApi\Errors\BadRequestException;
+use JsonApi\NonJsonApiController;
+use Neomerx\JsonApi\Exceptions\JsonApiException;
+use Neomerx\JsonApi\Schema\ErrorCollection;
+use Psr\Http\Message\ResponseInterface as Response;
+use Psr\Http\Message\ServerRequestInterface as Request;
+
+final class SlotCreationCount extends NonJsonApiController
+{
+    public function __invoke(Request $request, Response $response, array $args)
+    {
+        $parameters = $request->getQueryParams();
+
+        $this->validateParameters($parameters);
+
+        // Determine duration of a slot and pause times
+        $slot_count = ConsultationBlock::countSlots(
+            strtotime($parameters['start']),
+            strtotime($parameters['end']),
+            $parameters['dow'],
+            $parameters['interval'],
+            $parameters['duration'],
+            $parameters['pause_time'] ?? null,
+            $parameters['pause_duration'] ?? null
+        );
+
+        $response->getBody()->write((string) $slot_count);
+        return $response->withAddedHeader('Content-Type', 'application/json');
+    }
+
+    private function validateParameters(array $parameters): void
+    {
+        $collection = new ErrorCollection();
+
+        foreach (['start', 'end', 'dow', 'interval', 'duration'] as $key) {
+            if (!isset($parameters[$key])) {
+                $collection->addQueryParameterError($key, 'Parameter is missing');
+            }
+        }
+
+        if (isset($parameters['start'], $parameters['end'])) {
+            $start = strtotime($parameters['start']);
+            $end = strtotime($parameters['end']);
+
+            if (!$start) {
+                $collection->addQueryParameterError('start', 'Parameter has invalid datetime format');
+            }
+
+            if (!$end) {
+                $collection->addQueryParameterError('end', 'Parameter has invalid datetime format');
+            }
+
+            if ($start && $end && $start > $end) {
+                $collection->addQueryParameterError('start', 'Datetime value of start must be before end');
+            }
+        }
+
+        if (
+            isset($parameters['dow'])
+            && (
+                !ctype_digit($parameters['dow'])
+                || $parameters['dow'] < 0
+                || $parameters['dow'] > 6
+            )
+        ) {
+            $collection->addQueryParameterError('dow', 'Parameter must be a number between 0 and 6');
+        }
+
+        if (
+            isset($parameters['interval'])
+            && (
+                !ctype_digit($parameters['interval'])
+                || $parameters['interval'] < 0
+                || $parameters['interval'] > 4
+            )
+        ) {
+            $collection->addQueryParameterError('interval', 'Parameter must be a number between 0 and 4');
+        }
+
+        if (
+            isset($parameters['duration'])
+            && (
+                !ctype_digit($parameters['duration'])
+                || $parameters['duration'] <= 0
+            )
+        ) {
+            $collection->addQueryParameterError('duration', 'Parameter must be a positive number');
+        }
+
+        if (
+            isset($parameters['pause_time'], $parameters['duration'])
+            && $parameters['pause_time'] < $parameters['duration']
+        ) {
+            $collection->addQueryParameterError('pause_time', 'The defined time to a pause is shorter than the duration of a slot.');
+        }
+
+        if (count($collection) > 0) {
+            throw new JsonApiException($collection);
+        }
+    }
+}