Add battery class

linux/battery.hpp

@@ -0,0 +1,127 @@
+#include <QByteArray>
+#include <QMap>
+#include <QString>
+
+#include "airpods_packets.h"
+
+class Battery
+{
+public:
+    // Enum for AirPods components
+    enum class Component
+    {
+        Right = 0x02,
+        Left = 0x04,
+        Case = 0x08,
+    };
+
+    enum class BatteryStatus
+    {
+        Unknown = 0,
+        Charging = 0x01,
+        Discharging = 0x02,
+        Disconnected = 0x04,
+    };
+
+    // Struct to hold battery level and status
+    struct BatteryState
+    {
+        int level = 0;  // Battery level (0-100), -1 if unknown
+        BatteryStatus status = BatteryStatus::Unknown;
+    };
+
+    // Constructor: Initialize all components to unknown state
+    Battery()
+    {
+        states[Component::Left] = {};
+        states[Component::Right] = {};
+        states[Component::Case] = {};
+    }
+
+    // Parse the battery status packet
+    bool parsePacket(const QByteArray &packet)
+    {
+        if (!packet.startsWith(AirPodsPackets::Parse::BATTERY_STATUS))
+        {
+            return false;
+        }
+
+        // Get battery count (number of components)
+        quint8 batteryCount = static_cast<quint8>(packet[6]);
+        if (batteryCount > 3 || packet.size() != 7 + 5 * batteryCount)
+        {
+            return false; // Invalid count or size mismatch
+        }
+
+        // Copy current states; only included components will be updated
+        QMap<Component, BatteryState> newStates = states;
+
+        // Parse each component
+        for (quint8 i = 0; i < batteryCount; ++i)
+        {
+            int offset = 7 + (5 * i);
+            quint8 type = static_cast<quint8>(packet[offset]);
+
+            // Verify spacer and end bytes
+            if (static_cast<quint8>(packet[offset + 1]) != 0x01 ||
+                static_cast<quint8>(packet[offset + 4]) != 0x01)
+            {
+                return false;
+            }
+
+            // Map byte value to component
+            Component comp = static_cast<Component>(type);
+
+            // Extract level and status
+            int level = static_cast<quint8>(packet[offset + 2]);
+            auto status = static_cast<BatteryStatus>(packet[offset + 3]);
+
+            // Update the state for this component
+            newStates[comp] = {level, status};
+        }
+
+        // Apply updates; unmentioned components retain old states
+        states = newStates;
+        return true;
+    }
+
+    // Get the raw state for a component
+    BatteryState getState(Component comp) const
+    {
+        return states.value(comp, {});
+    }
+
+    // Get a formatted status string including charging state
+    QString getComponentStatus(Component comp) const
+    {
+        BatteryState state = getState(comp);
+        if (state.level == -1)
+        {
+            return "Unknown";
+        }
+
+        QString statusStr;
+        switch (state.status)
+        {
+        case BatteryStatus::Unknown:
+            statusStr = "Unknown";
+            break;
+        case BatteryStatus::Charging:
+            statusStr = "Charging";
+            break;
+        case BatteryStatus::Discharging:
+            statusStr = "Discharging";
+            break;
+        case BatteryStatus::Disconnected:
+            statusStr = "Disconnected";
+            break;
+        default:
+            statusStr = "Invalid";
+            break;
+        }
+        return QString("%1% (%2)").arg(state.level).arg(statusStr);
+    }
+
+private:
+    QMap<Component, BatteryState> states;
+};