MAX transformation added

apps/abstraction/transformation.py

@@ -124,6 +124,79 @@ def _transform_thermostat_zigbee2mqtt_to_abstract(payload: dict[str, Any]) -> di
     return payload
 
 
+# ============================================================================
+# HANDLER FUNCTIONS: max technology (Homegear MAX!)
+# ============================================================================
+
+def _transform_thermostat_max_to_vendor(payload: dict[str, Any]) -> str:
+    """Transform abstract thermostat payload to MAX! (Homegear) format.
+    
+    MAX! expects only the integer temperature value (no JSON).
+    
+    Transformations:
+    - Extract 'target' temperature from payload
+    - Convert float to integer (MAX! only accepts integers)
+    - Return as plain string value
+    
+    Example:
+    - Abstract: {'mode': 'heat', 'target': 22.5}
+    - MAX!: "22"
+    
+    Note: MAX! ignores mode - it's always in heating mode
+    """
+    if "target" not in payload:
+        logger.warning(f"MAX! thermostat payload missing 'target': {payload}")
+        return "21"  # Default fallback
+    
+    target_temp = payload["target"]
+    
+    # Convert to integer (MAX! protocol requirement)
+    if isinstance(target_temp, (int, float)):
+        int_temp = int(round(target_temp))
+        return str(int_temp)
+    
+    logger.warning(f"MAX! invalid target temperature type: {type(target_temp)}, value: {target_temp}")
+    return "21"
+
+
+def _transform_thermostat_max_to_abstract(payload: str | int | float) -> dict[str, Any]:
+    """Transform MAX! (Homegear) thermostat payload to abstract format.
+    
+    MAX! sends only the integer temperature value (no JSON).
+    
+    Transformations:
+    - Parse plain string/int value
+    - Convert to float for abstract protocol
+    - Wrap in abstract payload structure with mode='heat'
+    
+    Example:
+    - MAX!: "22" or 22
+    - Abstract: {'target': 22.0, 'mode': 'heat'}
+    
+    Note: MAX! doesn't send current temperature via SET_TEMPERATURE topic
+    """
+    try:
+        # Handle both string and numeric input
+        if isinstance(payload, str):
+            target_temp = float(payload.strip())
+        elif isinstance(payload, (int, float)):
+            target_temp = float(payload)
+        else:
+            logger.warning(f"MAX! unexpected payload type: {type(payload)}, value: {payload}")
+            target_temp = 21.0
+        
+        return {
+            "target": target_temp,
+            "mode": "heat"  # MAX! is always in heating mode
+        }
+    except (ValueError, TypeError) as e:
+        logger.error(f"MAX! failed to parse temperature: {payload}, error: {e}")
+        return {
+            "target": 21.0,
+            "mode": "heat"
+        }
+
+
 # ============================================================================
 # REGISTRY: Maps (device_type, technology, direction) -> handler function
 # ============================================================================
@@ -142,6 +215,8 @@ TRANSFORM_HANDLERS: dict[tuple[str, str, str], TransformHandler] = {
     ("thermostat", "simulator", "to_abstract"): _transform_thermostat_simulator_to_abstract,
     ("thermostat", "zigbee2mqtt", "to_vendor"): _transform_thermostat_zigbee2mqtt_to_vendor,
     ("thermostat", "zigbee2mqtt", "to_abstract"): _transform_thermostat_zigbee2mqtt_to_abstract,
+    ("thermostat", "max", "to_vendor"): _transform_thermostat_max_to_vendor,
+    ("thermostat", "max", "to_abstract"): _transform_thermostat_max_to_abstract,
 }