implemented user story 1 for sensor

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/controller/SensorController.java

@@ -44,6 +44,8 @@ public class SensorController {
         newSensor.setName(s.getName());
         newSensor.setRoomId(s.getRoomId());
         newSensor.setValue(s.getValue());
+        newSensor.setError(s.getError());
+        newSensor.setTypical(s.getTypical());
 
         return deviceService.saveAsOwner(newSensor, principal.getName());
     }

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/dto/SensorSaveRequest.java

@@ -20,6 +20,10 @@ public class SensorSaveRequest {
 
     @NotNull private BigDecimal value;
 
+    @NotNull private BigDecimal error = new BigDecimal(1);
+
+    private BigDecimal typical;
+
     /**
      * The room this device belongs in, as a foreign key id. To use when updating and inserting from
      * a REST call.

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/models/Sensor.java

@@ -44,6 +44,13 @@ public class Sensor extends InputDevice implements RangeTriggerable {
     @Column(nullable = false, precision = 11, scale = 1)
     private BigDecimal value;
 
+    /** The value of the error according to this value */
+    @Column(nullable = false, precision = 11, scale = 1)
+    private BigDecimal err;
+
+    @Column(nullable = true, precision = 11, scale = 1)
+    private BigDecimal typical;
+
     /** The type of this sensor */
     @Column(nullable = false)
     @Enumerated(value = EnumType.STRING)
@@ -65,6 +72,26 @@ public class Sensor extends InputDevice implements RangeTriggerable {
         this.value = newValue;
     }
 
+    public BigDecimal getError() {
+        return err;
+    }
+
+    public void setError(BigDecimal err) {
+        this.err = err;
+    }
+
+    public BigDecimal getTypical() {
+        return typical;
+    }
+
+    public void setTypical(BigDecimal typical) {
+        this.typical = typical;
+    }
+
+    public void setTypicalNull() {
+        this.typical = null;
+    }
+
     public Sensor() {
         super("sensor");
     }

src/main/java/ch/usi/inf/sa4/sanmarinoes/smarthut/service/SensorService.java

@@ -4,6 +4,7 @@ import ch.usi.inf.sa4.sanmarinoes.smarthut.models.Sensor;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.models.SensorRepository;
 import ch.usi.inf.sa4.sanmarinoes.smarthut.socket.SensorSocketEndpoint;
 import java.math.BigDecimal;
+import java.util.Random;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
@@ -19,11 +20,23 @@ public class SensorService {
     @Autowired private SensorSocketEndpoint endpoint;
 
     private void randomJitter(Sensor sensor) {
-        updateValueFromSensor(
-                sensor,
-                Sensor.TYPICAL_VALUES
-                        .get(sensor.getSensor())
-                        .multiply(BigDecimal.valueOf(0.975 + Math.random() / 20)));
+
+        double x;
+        if (sensor.getTypical() == null) {
+            BigDecimal typical = Sensor.TYPICAL_VALUES.get(sensor.getSensor());
+
+            Random ran = new Random();
+            x = (ran.nextInt(typical.intValue()) + sensor.getError().intValue()) * 0.975 + 1;
+
+        } else {
+            Random ran = new Random();
+            x =
+                    (ran.nextInt(sensor.getTypical().intValue()) + sensor.getError().intValue())
+                                    * 0.975
+                            + 1;
+        }
+
+        updateValueFromSensor(sensor, new BigDecimal(x));
     }
 
     public void sensorFakeUpdate() {