First step of quota and using daemon

models/Quota.php

@@ -0,0 +1,96 @@
+<?php
+
+/*
+ * This file is part of RaspiSMS.
+ *
+ * (c) Pierre-Lin Bonnemaison <plebwebsas@gmail.com>
+ *
+ * This source file is subject to the GPL-3.0 license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace models;
+
+    class Quota extends StandardModel
+    {
+        /**
+         * Get remaining credit for a date
+         * if no quota for this user return max int
+         * @param int $id_user : User id
+         * @param \DateTime $at : date to get credit at
+         * @return int : number of remaining credits
+         */
+        public function get_remaining_credit (int $id_user, \DateTime $at): int
+        {
+            $query = '
+                SELECT (credit + additional - consumed) AS remaining_credit
+                FROM quota
+                WHERE id_user = :id_user
+                AND start_date <= :at
+                AND end_date > :at';
+
+            $params = [
+                'id_user' => $id_user,
+                'at' => $at->format('Y-m-d H:i:s'),
+            ];
+
+            $result = $this->_run_query($query, $params);
+
+            return ($result[0]['remaining_credit'] ?? PHP_INT_MAX);
+        }
+        
+        /**
+         * Get credit usage percent for a date
+         * if no quota for this user return 0
+         * @param int $id_user : User id
+         * @param \DateTime $at : date to get usage percent at
+         * @return float : percent of used credits
+         */
+        public function get_usage_percentage (int $id_user, \DateTime $at): int
+        {
+            $query = '
+                SELECT (consumed / (credit + additional)) AS usage_percentage
+                FROM quota
+                WHERE id_user = :id_user
+                AND start_date <= :at
+                AND end_date > :at';
+
+            $params = [
+                'id_user' => $id_user,
+                'at' => $at->format('Y-m-d H:i:s'),
+            ];
+
+            $result = $this->_run_query($query, $params);
+
+            return ($result[0]['usage_percentage'] ?? 0);
+        }
+        
+        /**
+         * Consume some credit for a user
+         * @param int $id_user : User id
+         * @param int $quantity : Number of credits to consume
+         * @return bool
+         */
+        public function consume_credit (int $id_user, int $quantity): int
+        {
+            $query = '
+                UPDATE quota
+                SET consumed = consumed + :quantity
+                WHERE id_user = :id_user';
+
+            $params = [
+                'id_user' => $id_user,
+                'quantity' => $quantity,
+            ];
+
+            return (bool) $this->_run_query($query, $params, \descartes\Model::ROWCOUNT);
+        }
+
+        /**
+         * Return table name.
+         */
+        protected function get_table_name(): string
+        {
+            return 'quota';
+        }
+    }