Implementation of gui alerts (not dissmissable yet). issue 9

Former-commit-id: 3184c884854a7db76467ab6e7310ce7dea951c39

src/se/hal/HalServer.java

@@ -8,6 +8,7 @@ import se.hal.deamon.PCDataSynchronizationDaemon;
 import se.hal.intf.HalDaemon;
 import se.hal.intf.HalHttpPage;
 import se.hal.page.*;
+import se.hal.page.HalAlertManager.*;
 import se.hal.struct.Event;
 import se.hal.struct.Sensor;
 import zutil.db.DBConnection;
@@ -39,13 +40,16 @@ public class HalServer {
         LogUtil.setFormatter("zutil", formatter);
         LogUtil.setGlobalFormatter(formatter);
 
+        // init Managers
+        HalContext.initialize();
+        ControllerManager.initialize();
+        HalAlertManager.initialize();
+
 
         // init DB and other configurations
-        HalContext.initialize();
         DBConnection db = HalContext.getDB();
 
         // Init sensors,events and controllers
-        ControllerManager.initialize();
         for(Sensor sensor : Sensor.getLocalSensors(db)){
             ControllerManager.getInstance().register(sensor);
         }
@@ -69,6 +73,9 @@ public class HalServer {
 
 
         // init http server
+        HalAlertManager.getInstance().addAlert(new HalAlert(AlertLevel.ERROR, "error test"));
+        HalAlertManager.getInstance().addAlert(new HalAlert(AlertLevel.INFO, "info test"));
+
         HalHttpPage.getRootNav().addSubNav(new HalNavigation("sensors", "Sensors"));
         HalHttpPage.getRootNav().addSubNav(new HalNavigation("events", "Events"));
         pages = new HalHttpPage[]{

src/se/hal/intf/HalHttpPage.java

@@ -1,6 +1,7 @@
 package se.hal.intf;
 
 import se.hal.HalContext;
+import se.hal.page.HalAlertManager;
 import se.hal.page.HalNavigation;
 import se.hal.struct.User;
 import zutil.db.DBConnection;
@@ -53,6 +54,7 @@ public abstract class HalHttpPage implements HttpPage{
             tmpl.set("nav", nav.getNavBreadcrumb().get(1));
             tmpl.set("rootNav", rootNav);
             tmpl.set("userNav", userNav);
+            tmpl.set("alerts", HalAlertManager.getInstance().generateAlerts());
             tmpl.set("content", httpRespond(session, cookie, request));
             out.print(tmpl.compile());
 

src/se/hal/page/HalAlertManager.java

@@ -0,0 +1,104 @@
+package se.hal.page;
+
+import zutil.io.file.FileUtil;
+import zutil.log.LogUtil;
+import zutil.net.http.HttpHeaderParser;
+import zutil.net.http.HttpPage;
+import zutil.net.http.HttpPrintStream;
+import zutil.parser.Templator;
+
+import java.io.IOException;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Created by ezivkoc on 2016-01-20.
+ */
+public class HalAlertManager implements HttpPage {
+    private static final Logger logger = LogUtil.getLogger();
+    private static final String TMPL_PATH = "web-resource/alerts.tmpl";
+    private static final String PAGE_NAME = "alert";
+    private static HalAlertManager instance;
+
+    public enum AlertLevel{
+        ERROR,
+        WARNING,
+        SUCCESS,
+        INFO
+    }
+
+    private List<HalAlert> alerts = new LinkedList<>();
+
+
+    private HalAlertManager(){}
+
+
+    public void addAlert(HalAlert alert){
+        alerts.add(alert);
+    }
+
+    public Templator generateAlerts(){
+        try {
+            Templator tmpl = new Templator(FileUtil.find(TMPL_PATH));
+            tmpl.set("alerts", alerts);
+            return tmpl;
+        }catch (IOException e){
+            logger.log(Level.SEVERE, null, e);
+        }
+        return null;
+    }
+
+    @Override
+    public void respond(HttpPrintStream out,
+                        HttpHeaderParser client_info,
+                        Map<String, Object> session,
+                        Map<String, String> cookie,
+                        Map<String, String> request) throws IOException {
+
+    }
+
+
+
+    public static void initialize(){
+        instance = new HalAlertManager();
+    }
+    public static HalAlertManager getInstance(){
+        return instance;
+    }
+
+
+    public static class HalAlert{
+        private static int nextId = 0;
+
+        private int id;
+        private AlertLevel level;
+        private String msg;
+
+        public HalAlert(AlertLevel level, String msg) {
+            this.id = nextId++;
+            this.level = level;
+            this.msg = msg;
+        }
+
+
+        public int getId() {
+            return id;
+        }
+
+        public AlertLevel getLevel() {
+            return level;
+        }
+        public boolean isError(){   return level == AlertLevel.ERROR; }
+        public boolean isWarning(){ return level == AlertLevel.WARNING; }
+        public boolean isSuccess(){ return level == AlertLevel.SUCCESS; }
+        public boolean isInfo(){    return level == AlertLevel.INFO; }
+
+        public String getMessage() {
+            return msg;
+        }
+    }
+}