' Copyright 2010 ESRI
' 
' All rights reserved under the copyright laws of the United States
' and applicable international laws, treaties, and conventions.
' 
' You may freely redistribute and use this sample code, with or
' without modification, provided you include the original copyright
' notice and use restrictions.
' 
' See the use restrictions.
' 

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Runtime.InteropServices
Imports System.Reflection
Imports System.ComponentModel
Imports ESRI.ArcGIS.esriSystem
Imports ESRI.ArcGIS.Geodatabase

''' <summary>
''' Utility methods for working with parameter values, and other shared utilities in setting up
''' these custom subset evaluators.
''' </summary>

Namespace SubsetNetworkEvaluators
  <Flags()> _
  Public Enum VarType
    Empty = &H0  'VT_EMPTY
    Null = &H1 'VT_NULL
    [Short] = &H2 'VT_I2
    [Integer] = &H3  'VT_I4
    Float = &H4  'VT_R4
    [Double] = &H5 'VT_R8
    [Date] = &H7 'VT_DATE
    [String] = &H8 'VT_BSTR
    Bool = &HB 'VT_BOOL
    ComObject = &HD  'VT_UNKNOWN
    Array = &H2000 'VT_ARRAY
  End Enum ' enum VarType

  Public Class SubsetHelper
    Public Shared Function FindParameter(ByVal netAttributeParams As IArray, ByVal searchName As String) As Integer
      If netAttributeParams Is Nothing OrElse searchName.Length <= 0 Then
        Return -1
      End If

      Dim compareName As String
      Dim netAttributeParam As INetworkAttributeParameter
      Dim count As Integer = netAttributeParams.Count
      Dim i As Integer = 0
      Do While i < count
        netAttributeParam = TryCast(netAttributeParams.Element(i), INetworkAttributeParameter)
        If Not netAttributeParam Is Nothing Then
          compareName = netAttributeParam.Name
          If String.Compare(searchName, compareName, True) = 0 Then
            Return i
          End If
        End If
        i += 1
      Loop

      Return -1
    End Function

    Public Shared Function GetSourceNames(ByVal netSources As List(Of INetworkSource)) As List(Of String)
      Dim sourceNames As List(Of String) = New List(Of String)()
      If netSources Is Nothing Then
        Return sourceNames
      End If

      For Each netSource As INetworkSource In netSources
        sourceNames.Add(netSource.Name)
      Next netSource

      Return sourceNames
    End Function

    Public Shared Function GetSourceList(ByVal netSourcesArray As IArray) As List(Of INetworkSource)
      Dim netSources As List(Of INetworkSource) = New List(Of INetworkSource)()
      Dim count As Integer = netSourcesArray.Count
      Dim netSource As INetworkSource
      Dim i As Integer = 0
      Do While i < count
        netSource = TryCast(netSourcesArray.Element(i), INetworkSource)
        If Not netSource Is Nothing Then
          netSources.Add(netSource)
        End If
        i += 1
      Loop
      Return netSources
    End Function

    Public Shared Function GetSourceList(ByVal netSources As List(Of INetworkSource), ByVal eType As esriNetworkElementType) As List(Of INetworkSource)
      Dim eTypes As List(Of esriNetworkElementType) = New List(Of esriNetworkElementType)()
      eTypes.Add(eType)
      Return GetSourceList(netSources, eTypes)
    End Function

    Public Shared Function GetSourceList(ByVal netSources As List(Of INetworkSource), ByVal eTypes As List(Of esriNetworkElementType)) As List(Of INetworkSource)
      Dim subList As List(Of INetworkSource) = New List(Of INetworkSource)()
      If netSources Is Nothing OrElse eTypes Is Nothing Then
        Return subList
      End If

      For Each netSource As INetworkSource In netSources
        For Each eType As esriNetworkElementType In eTypes
          If netSource.ElementType = eType Then
            subList.Add(netSource)
            Exit For
          End If
        Next eType
      Next netSource
      Return subList
    End Function

    Public Shared Function RemoveAttributeByName(ByVal netAttributes As IArray, ByVal name As String) As IArray
      Return RemoveAttributesByKeyName(netAttributes, name, True)
    End Function

    Public Shared Function RemoveAttributesByPrefix(ByVal netAttributes As IArray, ByVal prefix As String) As IArray
      Return RemoveAttributesByKeyName(netAttributes, prefix, True)
    End Function

    Public Shared Function RemoveAttributesBySuffix(ByVal netAttributes As IArray, ByVal suffix As String) As IArray
      Return RemoveAttributesByKeyName(netAttributes, suffix, False)
    End Function

    Public Shared Function RemoveAttributesByKeyName(ByVal netAttributes As IArray, ByVal keyName As String, ByVal keyIsPrefix As Boolean) As IArray
      Dim preservedNetAttributes As IArray = New ArrayClass()

      Dim keyNameLen As Integer = keyName.Length
      Dim netAttributeNameLen As Integer
      Dim netAttribute As INetworkAttribute
      Dim netAttributeName As String
      Dim isKeyAttribute As Boolean
      Dim ignoreCase As Boolean = True

      Dim count As Integer = netAttributes.Count
      Dim i As Integer = 0
      For i = 0 To count - 1
        netAttribute = TryCast(netAttributes.Element(i), INetworkAttribute)
        If netAttribute Is Nothing Then
          Continue For
        End If

        netAttributeName = netAttribute.Name
        netAttributeNameLen = netAttributeName.Length

        isKeyAttribute = False
        If keyNameLen = 0 Then
          isKeyAttribute = False
        ElseIf netAttributeNameLen < keyNameLen Then
          isKeyAttribute = False
        Else
          Dim startIndex As Integer = 0
          If (Not keyIsPrefix) Then
            startIndex = netAttributeNameLen - keyNameLen
          End If

          If String.Compare(netAttributeName.Substring(startIndex, keyNameLen), keyName, ignoreCase) = 0 Then
            isKeyAttribute = True
          End If
        End If

        If (Not isKeyAttribute) Then
          preservedNetAttributes.Add(netAttribute)
        End If
      Next i

      Return preservedNetAttributes
    End Function

    Public Shared Function FindAttributeIndexes(ByVal netAttributes As IArray, ByVal usage As esriNetworkAttributeUsageType, ByVal dataType As esriNetworkAttributeDataType, ByVal searchTimeUnits As Boolean, ByVal ignoreDataType As Boolean) As List(Of Integer)
      Dim netAttribute As INetworkAttribute2 = Nothing
      Dim units As esriNetworkAttributeUnits = esriNetworkAttributeUnits.esriNAUUnknown
      Dim isSearchUnits As Boolean = False
      Dim isUnknownUnits As Boolean = False
      Dim isTimeUnits As Boolean = False

      Dim netAttributeIndexes As List(Of Integer) = New List(Of Integer)()
      Dim count As Integer = netAttributes.Count

      Dim i As Integer = 0
      For i = 0 To count - 1
        netAttribute = TryCast(netAttributes.Element(i), INetworkAttribute2)
        If netAttribute Is Nothing Then
          Continue For
        End If

        If netAttribute.UsageType = usage AndAlso (ignoreDataType OrElse netAttribute.DataType = dataType) Then
          units = netAttribute.Units
          isSearchUnits = False

          If usage <> esriNetworkAttributeUsageType.esriNAUTCost Then
            isSearchUnits = True
          Else
            isUnknownUnits = False
            If units = esriNetworkAttributeUnits.esriNAUUnknown Then
              isUnknownUnits = True
            End If

            isTimeUnits = False
            If (Not isUnknownUnits) Then
              If units = esriNetworkAttributeUnits.esriNAUMinutes OrElse units = esriNetworkAttributeUnits.esriNAUSeconds OrElse units = esriNetworkAttributeUnits.esriNAUHours OrElse units = esriNetworkAttributeUnits.esriNAUDays Then
                isTimeUnits = True
              End If

              If searchTimeUnits Then
                isSearchUnits = isTimeUnits
              Else
                isSearchUnits = Not isTimeUnits
              End If
            End If
          End If
          If isSearchUnits Then
            netAttributeIndexes.Add(i)
          End If
        End If
      Next i

      Return netAttributeIndexes
    End Function

    Public Shared Function FindAttributes(ByVal netAttributesArray As IArray, ByVal netAttributeIndexes As List(Of Integer)) As List(Of INetworkAttribute2)
      Dim netAttributes As List(Of INetworkAttribute2) = New List(Of INetworkAttribute2)()
      For Each i As Integer In netAttributeIndexes
        Dim netAttribute As INetworkAttribute2 = TryCast(netAttributesArray.Element(i), INetworkAttribute2)
        If Not netAttribute Is Nothing Then
          netAttributes.Add(netAttribute)
        End If
      Next i

      Return netAttributes
    End Function

    Public Shared Sub SetDefaultEvaluator(ByVal netAttribute As IEvaluatedNetworkAttribute, ByVal defaultValue As Object, ByVal eType As esriNetworkElementType)
      Dim constEvaluator As INetworkConstantEvaluator = New NetworkConstantEvaluatorClass()
      constEvaluator.ConstantValue = defaultValue
      Dim eval As INetworkEvaluator = TryCast(constEvaluator, INetworkEvaluator)
      netAttribute.DefaultEvaluator(eType) = eval
    End Sub

    Public Shared Sub SetEvaluators(ByVal netAttribute As IEvaluatedNetworkAttribute, ByVal netSource As INetworkSource, ByVal t As Type)
      Dim eType As esriNetworkElementType = netSource.ElementType
      If eType = esriNetworkElementType.esriNETEdge Then
        SetEvaluator(netAttribute, netSource, t, esriNetworkEdgeDirection.esriNEDAlongDigitized)
        SetEvaluator(netAttribute, netSource, t, esriNetworkEdgeDirection.esriNEDAgainstDigitized)
      Else
        SetEvaluator(netAttribute, netSource, t, esriNetworkEdgeDirection.esriNEDNone)
      End If
    End Sub

    Public Shared Sub SetEvaluator(ByVal netAttribute As IEvaluatedNetworkAttribute, ByVal netSource As INetworkSource, ByVal t As Type, ByVal dirType As esriNetworkEdgeDirection)
      Dim obj As Object = Activator.CreateInstance(t)
      Dim eval As INetworkEvaluator = TryCast(obj, INetworkEvaluator)
      netAttribute.Evaluator(netSource, dirType) = eval
    End Sub
  End Class
End Namespace