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-rw-r--r--Software/Visual_Studio/Tango.BL/ActionLogs/DefaultActionLogComparer.cs254
1 files changed, 0 insertions, 254 deletions
diff --git a/Software/Visual_Studio/Tango.BL/ActionLogs/DefaultActionLogComparer.cs b/Software/Visual_Studio/Tango.BL/ActionLogs/DefaultActionLogComparer.cs
deleted file mode 100644
index d93b130c4..000000000
--- a/Software/Visual_Studio/Tango.BL/ActionLogs/DefaultActionLogComparer.cs
+++ /dev/null
@@ -1,254 +0,0 @@
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Linq;
-using System.Reflection;
-using System.Text;
-using System.Threading.Tasks;
-using Tango.BL.ValueObjects;
-
-namespace Tango.BL.ActionLogs
-{
- /// <summary>
- /// Represents the default implementation of <see cref="IActionLogComparer"/>.
- /// </summary>
- public class DefaultActionLogComparer : IActionLogComparer
- {
- /// <summary>
- /// Compares the specified object before and after changes and returns the difference tree.
- /// </summary>
- /// <param name="before">The object before the change.</param>
- /// <param name="after">The object after the change.</param>
- /// <returns></returns>
- public Task<ActionLogDifference> Compare(IActionLogComparable before, IActionLogComparable after)
- {
- return Task.Factory.StartNew<ActionLogDifference>(() =>
- {
- ActionLogDifference diff = new ActionLogDifference();
- diff.Name = GetComponentName(before, after);
-
- Compare(diff, before, after, null);
- RemoveNoDifferences(diff);
-
- return diff;
- });
- }
-
- #region Helpers
-
- private void Compare(ActionLogDifference diff, Object before, Object after, HashSet<Object> scannedObjects)
- {
- if (scannedObjects == null)
- {
- scannedObjects = new HashSet<object>();
- }
-
- if (before == null && after == null) return;
-
- if (before != null)
- {
- if (scannedObjects.Contains(before)) return;
- scannedObjects.Add(before);
- }
-
- if (after != null)
- {
- if (scannedObjects.Contains(after)) return;
- scannedObjects.Add(after);
- }
-
- foreach (var prop in GetProperties(before, after).OrderByDescending(x => x.PropertyType.IsValueTypeOrString()))
- {
- if (prop.PropertyType == typeof(byte[]) || GetShouldIgnore(prop, before, after)) continue;
-
- if (prop.PropertyType.IsValueTypeOrString())
- {
- object beforeValue = null;
- object afterValue = null;
-
- if (before != null)
- {
- beforeValue = prop.GetValue(before);
- }
-
- if (after != null)
- {
- afterValue = prop.GetValue(after);
- }
-
- if (afterValue == null && beforeValue != null) AddValueDiff(diff, prop.Name, beforeValue, afterValue);
- if (afterValue != null && beforeValue == null) AddValueDiff(diff, prop.Name, beforeValue, afterValue);
-
- if (afterValue != null && beforeValue != null)
- {
- if (!afterValue.Equals(beforeValue))
- {
- AddValueDiff(diff, prop.Name, beforeValue, afterValue);
- }
- }
- }
- else if (!prop.PropertyType.IsGenericType)
- {
- object beforePropInstance = null;
- object afterPropInstance = null;
-
- if (before != null)
- {
- beforePropInstance = prop.GetValue(before);
- }
-
- if (after != null)
- {
- afterPropInstance = prop.GetValue(after);
- }
-
- Compare(AddChildDiff(diff, prop.Name), beforePropInstance, afterPropInstance, scannedObjects);
- }
- else
- {
- IList beforeCollection = null;
- IList afterCollection = null;
- ActionLogDifference listDiff = new ActionLogDifference()
- {
- Name = prop.Name
- };
-
- if (before != null)
- {
- beforeCollection = prop.GetValue(before) as IList;
- }
-
- if (after != null)
- {
- afterCollection = prop.GetValue(after) as IList;
- }
-
- int listCount = 0;
-
- if (beforeCollection != null && afterCollection == null)
- {
- for (int i = 0; i < beforeCollection.Count; i++)
- {
- listCount++;
- Compare(AddChildDiff(listDiff, GetActionLogName(beforeCollection[i], prop.Name)), beforeCollection[i], null, scannedObjects);
- }
- }
- else if (beforeCollection == null && afterCollection != null)
- {
- for (int i = 0; i < afterCollection.Count; i++)
- {
- listCount++;
- Compare(AddChildDiff(listDiff, GetActionLogName(afterCollection[i], prop.Name)), null, afterCollection[i], scannedObjects);
- }
- }
-
- if (beforeCollection != null && afterCollection != null)
- {
- for (int i = 0; i < Math.Max(beforeCollection.Count, afterCollection.Count); i++)
- {
- var beforeItem = i < beforeCollection.Count ? beforeCollection[i] : null;
- var afterItem = i < afterCollection.Count ? afterCollection[i] : null;
-
- listCount++;
- Compare(AddChildDiff(listDiff, GetActionLogName(beforeItem, prop.Name)), beforeItem, afterItem, scannedObjects);
- }
- }
-
- if (listCount > 0)
- {
- diff.Children.Add(listDiff);
- }
- }
- }
- }
-
- private void AddValueDiff(ActionLogDifference diff, String property, object before, object after)
- {
- diff.Children.Add(new ActionLogDifferenceValue()
- {
- Name = property,
- Before = before,
- After = after
- });
- }
-
- private ActionLogDifference AddChildDiff(ActionLogDifference diff, String property)
- {
- ActionLogDifference childDiff = new ActionLogDifference();
- childDiff.Name = property;
- diff.Children.Add(childDiff);
- return childDiff;
- }
-
- private void RemoveNoDifferences(ActionLogDifference diff)
- {
- foreach (var child in diff.Children.ToList())
- {
- if (!child.HasDifference)
- {
- diff.Children.Remove(child);
- }
- else
- {
- RemoveNoDifferences(child);
- }
- }
- }
-
- private String GetComponentName(Object before, Object after)
- {
- var afterCast = after as IActionLogComparable;
- var beforeCast = before as IActionLogComparable;
-
- var name = afterCast != null ? afterCast.GetActionLogName() : beforeCast.GetActionLogName();
-
- return name;
- }
-
- private String GetActionLogName(Object obj, String defaultName)
- {
- var objCast = obj as IActionLogComparable;
- if (objCast != null)
- {
- return objCast.GetActionLogName();
- }
- else
- {
- return defaultName;
- }
- }
-
- private PropertyInfo GetProperty(String name, Object before, Object after)
- {
- return after != null ? after.GetType().GetProperty(name) : before.GetType().GetProperty(name);
- }
-
- private List<PropertyInfo> GetProperties(BindingFlags flags, Object before, Object after)
- {
- return after != null ? after.GetType().GetProperties(flags).ToList() : before.GetType().GetProperties(flags).ToList();
- }
-
- private List<PropertyInfo> GetProperties(Object before, Object after)
- {
- return after != null ? after.GetType().GetProperties().ToList() : before.GetType().GetProperties().ToList();
- }
-
- private bool GetShouldIgnore(PropertyInfo prop, Object before, Object after)
- {
- if (prop.GetCustomAttribute<ActionLogIgnoreAttribute>() != null)
- {
- return true;
- }
-
- var beforeCast = before as IActionLogComparable;
- var afterCast = after as IActionLogComparable;
-
- if (beforeCast != null) return beforeCast.ShouldActionLogIgnore(prop.Name);
- if (afterCast != null) return afterCast.ShouldActionLogIgnore(prop.Name);
-
- return false;
- }
-
- #endregion
- }
-}
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