From 70c4fce32478583e20fe19a96188a0ad1f5c4373 Mon Sep 17 00:00:00 2001
From: Mika <kontakt@donau2space.de>
Date: Sun, 5 Jul 2026 02:07:32 +0000
Subject: [PATCH] Add data_visualization/js/api.js

---
 data_visualization/js/api.js | 44 ++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 data_visualization/js/api.js

diff --git a/data_visualization/js/api.js b/data_visualization/js/api.js
new file mode 100644
index 0000000..179f456
--- /dev/null
+++ b/data_visualization/js/api.js
@@ -0,0 +1,44 @@
+/**
+ * @module api
+ * Kommuniziert mit der Backend-Route /data und liefert Messdaten.
+ * @description Dieses Modul stellt Funktionen zum Abrufen der Sensordaten bereit.
+ */
+
+/**
+ * Holt Sensorwerte (Temperatur, Luftfeuchtigkeit, Licht) von der API.
+ * @async
+ * @function fetchSensorData
+ * @returns {Promise<Array<{timestamp: string, location_id: string, temperature: number, humidity: number, light: number}>>} Messdaten-Array
+ * @throws {Error} Wenn der Abruf fehlschlägt oder die Antwort ungültig ist.
+ */
+export async function fetchSensorData() {
+  try {
+    const response = await fetch('/data', {
+      method: 'GET',
+      headers: {
+        'Accept': 'application/json'
+      }
+    });
+
+    if (!response.ok) {
+      throw new Error(`API request failed with status ${response.status}`);
+    }
+
+    const data = await response.json();
+
+    if (!Array.isArray(data)) {
+      throw new Error('Invalid API response: expected an array.');
+    }
+
+    return data.map(item => ({
+      timestamp: item.timestamp ?? '',
+      location_id: item.location_id ?? '',
+      temperature: typeof item.temperature === 'number' ? item.temperature : null,
+      humidity: typeof item.humidity === 'number' ? item.humidity : null,
+      light: typeof item.light === 'number' ? item.light : null
+    }));
+  } catch (error) {
+    console.error('Fehler beim Abrufen der Sensordaten:', error);
+    throw error;
+  }
+}