implementing HomeAssistant

src/main/java/com/bwssystems/hass/HomeAssistant.java

@@ -0,0 +1,78 @@
+package com.bwssystems.hass;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import org.apache.http.HttpResponse;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.util.EntityUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.bwssystems.HABridge.NamedIP;
+import com.google.gson.Gson;
+
+public class HomeAssistant {
+    private static final Logger log = LoggerFactory.getLogger(HomeAssistant.class);
+    private NamedIP hassAddress;
+    private HttpClient httpClient;
+
+	public HomeAssistant(NamedIP addressName) {
+		super();
+        httpClient = HttpClients.createDefault();
+        hassAddress = addressName;
+	}
+
+	public NamedIP getHassAddress() {
+		return hassAddress;
+	}
+
+	public void setHassAddress(NamedIP hassAddress) {
+		this.hassAddress = hassAddress;
+	}
+
+	public List<State> getDevices() {
+		List<State> theDeviceStates = null;
+		State[] theHassStates;
+		String theUrl = null;
+    	String theData;
+   		theUrl = "http://" + hassAddress.getIp() + ":" + hassAddress.getPort() + "/api/states";
+   		theData = doHttpGETRequest(theUrl);
+    	if(theData != null) {
+    		log.debug("GET Hass States - data: " + theData);
+    		theHassStates = new Gson().fromJson(theData, State[].class);
+	    	if(theHassStates == null) {
+	    		log.warn("Cannot get an devices for HomeAssistant " + hassAddress.getName() + " as response is not parsable.");
+	    	}
+	    	else {
+	    		theDeviceStates = new ArrayList<State>(Arrays.asList(theHassStates));
+	    	}
+    	}
+    	else
+    		log.warn("Cannot get an devices for HomeAssistant " + hassAddress.getName() + " http call failed.");
+		return theDeviceStates;
+	}
+
+	//	This function executes the url against the hass
+    protected String doHttpGETRequest(String url) {
+    	String theContent = null;
+        log.debug("calling GET on URL: " + url);
+        HttpGet httpGet = new HttpGet(url);
+        try {
+            HttpResponse response = httpClient.execute(httpGet);
+            log.debug("GET on URL responded: " + response.getStatusLine().getStatusCode());
+            if(response.getStatusLine().getStatusCode() == 200){
+                theContent = EntityUtils.toString(response.getEntity(), Charset.forName("UTF-8")); //read content for data
+                EntityUtils.consume(response.getEntity()); //close out inputstream ignore content
+            }
+        } catch (IOException e) {
+            log.error("doHttpGETRequest: Error calling out to HA gateway: " + e.getMessage());
+        }
+        return theContent;
+    }
+}