moel@1: /*
moel@1:  
moel@344:   This Source Code Form is subject to the terms of the Mozilla Public
moel@344:   License, v. 2.0. If a copy of the MPL was not distributed with this
moel@344:   file, You can obtain one at http://mozilla.org/MPL/2.0/.
moel@1:  
moel@365:   Copyright (C) 2009-2012 Michael Möller <mmoeller@openhardwaremonitor.org>
moel@344: 	
moel@1: */
moel@1: 
moel@1: using System;
moel@1: using System.Collections.Generic;
moel@166: using System.Globalization;
moel@298: using System.IO;
moel@298: using System.IO.Compression;
moel@165: using OpenHardwareMonitor.Collections;
moel@1: 
moel@1: namespace OpenHardwareMonitor.Hardware {
moel@1: 
moel@165:   internal class Sensor : ISensor {
moel@1: 
moel@195:     private readonly string defaultName;
moel@1:     private string name;
moel@195:     private readonly int index;
moel@195:     private readonly bool defaultHidden;
moel@195:     private readonly SensorType sensorType;
moel@298:     private readonly Hardware hardware;
moel@195:     private readonly ReadOnlyArray<IParameter> parameters;
moel@167:     private float? currentValue;
moel@167:     private float? minValue;
moel@167:     private float? maxValue;
moel@298:     private readonly RingCollection<SensorValue> 
moel@298:       values = new RingCollection<SensorValue>();
moel@195:     private readonly ISettings settings;
moel@247:     private IControl control;
moel@1:     
moel@195:     private float sum;
moel@195:     private int count;
moel@28:    
moel@1:     public Sensor(string name, int index, SensorType sensorType,
moel@298:       Hardware hardware, ISettings settings) : 
moel@165:       this(name, index, sensorType, hardware, null, settings) { }
moel@1: 
moel@134:     public Sensor(string name, int index, SensorType sensorType,
moel@298:       Hardware hardware, ParameterDescription[] parameterDescriptions, 
moel@165:       ISettings settings) :
moel@134:       this(name, index, false, sensorType, hardware,
moel@165:         parameterDescriptions, settings) { }
moel@63: 
moel@109:     public Sensor(string name, int index, bool defaultHidden, 
moel@298:       SensorType sensorType, Hardware hardware, 
moel@165:       ParameterDescription[] parameterDescriptions, ISettings settings) 
moel@165:     {           
moel@1:       this.index = index;
moel@109:       this.defaultHidden = defaultHidden;
moel@1:       this.sensorType = sensorType;
moel@1:       this.hardware = hardware;
moel@109:       Parameter[] parameters = new Parameter[parameterDescriptions == null ?
moel@109:         0 : parameterDescriptions.Length];
moel@63:       for (int i = 0; i < parameters.Length; i++ ) 
moel@165:         parameters[i] = new Parameter(parameterDescriptions[i], this, settings);
moel@63:       this.parameters = parameters;
moel@63: 
moel@165:       this.settings = settings;
moel@165:       this.defaultName = name; 
moel@166:       this.name = settings.GetValue(
moel@165:         new Identifier(Identifier, "name").ToString(), name);
moel@298: 
moel@358:       GetSensorValuesFromSettings();      
moel@298: 
moel@298:       hardware.Closing += delegate(IHardware h) {
moel@298:         SetSensorValuesToSettings();
moel@298:       };
moel@298:     }
moel@298: 
moel@298:     private void SetSensorValuesToSettings() {
moel@298:       using (MemoryStream m = new MemoryStream()) {
moel@298:         using (GZipStream c = new GZipStream(m, CompressionMode.Compress))
moel@365:         using (BufferedStream b = new BufferedStream(c, 65536))
moel@365:         using (BinaryWriter writer = new BinaryWriter(b)) {
moel@365:           long t = 0;
moel@298:           foreach (SensorValue sensorValue in values) {
moel@365:             long v = sensorValue.Time.ToBinary();
moel@365:             writer.Write(v - t);
moel@365:             t = v;
moel@298:             writer.Write(sensorValue.Value);
moel@298:           }
moel@365:           writer.Flush();
moel@298:         }
moel@298:         settings.SetValue(new Identifier(Identifier, "values").ToString(),
moel@365:           Convert.ToBase64String(m.ToArray()));
moel@298:       }
moel@298:     }
moel@298: 
moel@298:     private void GetSensorValuesFromSettings() {
moel@358:       string name = new Identifier(Identifier, "values").ToString();
moel@358:       string s = settings.GetValue(name, null);
moel@298: 
moel@298:       try {
moel@358:         byte[] array = Convert.FromBase64String(s);
moel@358:         s = null;
moel@376:         DateTime now = DateTime.UtcNow;
moel@298:         using (MemoryStream m = new MemoryStream(array))
moel@298:         using (GZipStream c = new GZipStream(m, CompressionMode.Decompress))
moel@298:         using (BinaryReader reader = new BinaryReader(c)) {
moel@298:           try {
moel@365:             long t = 0;
moel@298:             while (true) {
moel@365:               t += reader.ReadInt64();
moel@376:               DateTime time = DateTime.FromBinary(t);
moel@376:               if (time > now)
moel@376:                 break;
moel@298:               float value = reader.ReadSingle();
moel@298:               AppendValue(value, time);
moel@298:             }
moel@298:           } catch (EndOfStreamException) { }
moel@298:         }
moel@298:       } catch { }
moel@298:       if (values.Count > 0)
moel@314:         AppendValue(float.NaN, DateTime.UtcNow);
moel@358: 
moel@358:       // remove the value string from the settings to reduce memory usage
moel@358:       settings.Remove(name);
moel@298:     }
moel@298: 
moel@298:     private void AppendValue(float value, DateTime time) {
moel@298:       if (values.Count >= 2 && values.Last.Value == value && 
moel@298:         values[values.Count - 2].Value == value) {
moel@298:         values.Last = new SensorValue(value, time);
moel@298:         return;
moel@298:       } 
moel@298: 
moel@298:       values.Append(new SensorValue(value, time));
moel@1:     }
moel@1: 
moel@28:     public IHardware Hardware {
moel@28:       get { return hardware; }
moel@28:     }
moel@28: 
moel@1:     public SensorType SensorType {
moel@1:       get { return sensorType; }
moel@1:     }
moel@1: 
moel@109:     public Identifier Identifier {
moel@28:       get {
moel@166:         return new Identifier(hardware.Identifier,
moel@166:           sensorType.ToString().ToLowerInvariant(),
moel@166:           index.ToString(CultureInfo.InvariantCulture));
moel@28:       }
moel@28:     }
moel@28: 
moel@1:     public string Name {
moel@1:       get { 
moel@1:         return name; 
moel@1:       }
moel@1:       set {
moel@167:         if (!string.IsNullOrEmpty(value)) 
moel@1:           name = value;          
moel@1:         else 
moel@1:           name = defaultName;
moel@166:         settings.SetValue(new Identifier(Identifier, "name").ToString(), name);
moel@1:       }
moel@1:     }
moel@1: 
moel@1:     public int Index {
moel@1:       get { return index; }
moel@1:     }
moel@1: 
moel@109:     public bool IsDefaultHidden {
moel@109:       get { return defaultHidden; }
moel@109:     }
moel@109: 
moel@63:     public IReadOnlyArray<IParameter> Parameters {
moel@63:       get { return parameters; }
moel@63:     }
moel@63: 
moel@1:     public float? Value {
moel@1:       get { 
moel@167:         return currentValue; 
moel@1:       }
moel@1:       set {
moel@314:         DateTime now = DateTime.UtcNow;
moel@298:         while (values.Count > 0 && (now - values.First.Time).TotalDays > 1)
moel@298:           values.Remove();
moel@1: 
moel@1:         if (value.HasValue) {
moel@1:           sum += value.Value;
moel@1:           count++;
moel@1:           if (count == 4) {
moel@298:             AppendValue(sum / count, now);
moel@1:             sum = 0;
moel@1:             count = 0;
moel@1:           }
moel@1:         }
moel@1: 
moel@167:         this.currentValue = value;
moel@167:         if (minValue > value || !minValue.HasValue)
moel@167:           minValue = value;
moel@167:         if (maxValue < value || !maxValue.HasValue)
moel@167:           maxValue = value;
moel@1:       }
moel@1:     }
moel@1: 
moel@167:     public float? Min { get { return minValue; } }
moel@167:     public float? Max { get { return maxValue; } }
moel@1: 
moel@151:     public void ResetMin() {
moel@167:       minValue = null;
moel@151:     }
moel@151: 
moel@151:     public void ResetMax() {
moel@167:       maxValue = null;
moel@151:     }
moel@151: 
moel@159:     public IEnumerable<SensorValue> Values {
moel@159:       get { return values; }
moel@159:     }    
moel@110: 
moel@110:     public void Accept(IVisitor visitor) {
moel@167:       if (visitor == null)
moel@167:         throw new ArgumentNullException("visitor");
moel@167:       visitor.VisitSensor(this);
moel@110:     }
moel@110: 
moel@110:     public void Traverse(IVisitor visitor) {
moel@110:       foreach (IParameter parameter in parameters)
moel@110:         parameter.Accept(visitor);
moel@110:     }
moel@247: 
moel@247:     public IControl Control {
moel@247:       get {
moel@247:         return control;
moel@247:       }
moel@247:       internal set {
moel@247:         this.control = value;
moel@247:       }
moel@247:     }
moel@1:   }
moel@1: }