Expand chart api

app/Support/Chart/ChartData.php

@@ -0,0 +1,73 @@
+<?php
+/*
+ * ChartData.php
+ * Copyright (c) 2024 james@firefly-iii.org.
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Support\Chart;
+
+use FireflyIII\Exceptions\FireflyException;
+
+class ChartData
+{
+    private array $series;
+
+    public function __construct()
+    {
+        $this->series = [];
+    }
+
+    public function render(): array
+    {
+        if (0 === count($this->series)) {
+            throw new FireflyException('No series added to chart');
+        }
+
+        return $this->series;
+    }
+
+    /**
+     * @param array $data
+     *
+     * @return void
+     * @throws FireflyException
+     */
+    public function add(array $data): void
+    {
+        if (array_key_exists('currency_id', $data)) {
+            $data['currency_id'] = (string) $data['currency_id'];
+        }
+        if (array_key_exists('native_currency_id', $data)) {
+            $data['native_currency_id'] = (string) $data['native_currency_id'];
+        }
+        if (!array_key_exists('start', $data)) {
+            throw new FireflyException('Data-set is missing the "start"-variable.');
+        }
+        if (!array_key_exists('end', $data)) {
+            throw new FireflyException('Data-set is missing the "end"-variable.');
+        }
+        if (!array_key_exists('period', $data)) {
+            throw new FireflyException('Data-set is missing the "period"-variable.');
+        }
+
+        $this->series[] = $data;
+    }
+
+}