v1: Live ADS-B radar with detail panel, units, legend, proximity LED alert

src/settings_store.cpp

@@ -0,0 +1,72 @@
+#include "settings_store.h"
+#include "config.h"
+#include <SD.h>
+
+namespace SettingsStore {
+
+namespace {
+    uint8_t rangeIdx = Config::DEFAULT_RANGE_INDEX;
+    bool inverted = false;
+
+    void applyKeyValue(const String& key, const String& value) {
+        if (key == "range_index") {
+            int v = value.toInt();
+            if (v >= 0 && v < Config::RANGE_STEP_COUNT) {
+                rangeIdx = (uint8_t)v;
+            }
+        } else if (key == "invert") {
+            inverted = (value.toInt() != 0);
+        }
+        // Weitere Einstellungen hier ergaenzen (unbekannte Keys werden
+        // einfach ignoriert, damit alte config.txt-Dateien kompatibel bleiben).
+    }
+}
+
+void load() {
+    if (!SD.exists(Config::SD_SETTINGS_FILE)) return;
+
+    File f = SD.open(Config::SD_SETTINGS_FILE, FILE_READ);
+    if (!f) return;
+
+    while (f.available()) {
+        String line = f.readStringUntil('\n');
+        line.trim();
+        if (line.length() == 0 || line.startsWith("#")) continue;
+
+        int eq = line.indexOf('=');
+        if (eq < 0) continue;
+
+        String key = line.substring(0, eq);
+        String value = line.substring(eq + 1);
+        key.trim();
+        value.trim();
+        applyKeyValue(key, value);
+    }
+    f.close();
+}
+
+void save() {
+    File f = SD.open(Config::SD_SETTINGS_FILE, FILE_WRITE);
+    if (!f) return;
+    f.printf("range_index=%d\n", rangeIdx);
+    f.printf("invert=%d\n", inverted ? 1 : 0);
+    f.close();
+}
+
+uint8_t rangeIndex() { return rangeIdx; }
+
+void setRangeIndex(uint8_t idx) {
+    if (idx < Config::RANGE_STEP_COUNT) {
+        rangeIdx = idx;
+        save();
+    }
+}
+
+bool displayInverted() { return inverted; }
+
+void setDisplayInverted(bool inv) {
+    inverted = inv;
+    save();
+}
+
+}