Attribute VB_Name = "DataAccess"
Option Private Module
Option Explicit

Public Function AccessDatabase() As InfoDatabase
  Static s_AccessDatabase As InfoDatabase
  
  On Error GoTo CREATE_NEW
  Set AccessDatabase = s_AccessDatabase.Validate
  Exit Function
  
CREATE_NEW:
  Set s_AccessDatabase = New InfoDatabase
  Call s_AccessDatabase.Init(ThisWorkbook, GetDocumentsLocation(ThisWorkbook))
  Set AccessDatabase = s_AccessDatabase
End Function

Public Function SetDocumentsLocation(sDir$)
  ThisWorkbook.Names(HT03_CELL_FOLDER).RefersToRange = sDir
  AccessDatabase.docsLocation_ = GetDocumentsLocation(ThisWorkbook)
End Function

Public Function ClearAll()
  ThisWorkbook.Names(CELL_STAT_BASE).RefersToRange = 0
  Call SetDocumentsLocation(HT03_DEFAULT_WORKDIR)
  Call ThisWorkbook.Sheets(HT03_SHT_DOCS).UsedRange.Offset(1).ClearContents
  Call ThisWorkbook.Sheets(HT03_SHT_LINKS).UsedRange.Offset(1).ClearContents
End Function

Public Function GetIndexDump() As Long()
  Dim theDB As InfoDatabase: Set theDB = AccessDatabase
  GetIndexDump = theDB.IndexDump
End Function

Public Function GetLinksDump(target&) As Long()
  Dim theDB As InfoDatabase: Set theDB = AccessDatabase
  GetLinksDump = theDB.LinksDumpFor(target)
End Function

Public Function SetLinksFor(target&, linksData() As String)
  Dim theDB As InfoDatabase: Set theDB = AccessDatabase
  If Not theDB.Contains(target) Then _
    Exit Function
    
  Call theDB.StartOptimization
  
  Call theDB.DeleteLinksFor(target)
  Call theDB.SetLinksInternal(target, linksData)
 
  Call theDB.EndOptimization
End Function

Public Function RemoveLinksFor(target&) As Long
  RemoveLinksFor = 0
  Dim lnksSht As Excel.Worksheet: Set lnksSht = ThisWorkbook.Sheets(HT03_SHT_LINKS)
  Dim nRow&: nRow = HT03_DEFAULT_FIRST_LINE
  Do While lnksSht.Cells(nRow, S_L_FROM_ID) <> vbNullString
    If lnksSht.Cells(nRow, S_L_FROM_ID) = target Then
      lnksSht.Rows(nRow).Delete
      RemoveLinksFor = RemoveLinksFor + 1
    Else
      nRow = nRow + 1
    End If
  Loop
End Function

Public Function RemoveIDFromDocs(target&) As String
  Dim docsSht As Excel.Worksheet: Set docsSht = ThisWorkbook.Sheets(HT03_SHT_DOCS)
  Dim nRow&: nRow = HT03_DEFAULT_FIRST_LINE
  Do While docsSht.Cells(nRow, S_D_GARANT_ID) <> vbNullString
    If docsSht.Cells(nRow, S_D_GARANT_ID) = target Then
      Dim theFile$: theFile = docsSht.Cells(nRow, S_D_FILENAME)
      If theFile <> HT03_FILE_NOT_LOADED Then
        theFile = AccessDatabase.docsLocation_ & "/" & theFile
      Else
        theFile = vbNullString
      End If
      docsSht.Rows(nRow).Delete
      RemoveIDFromDocs = theFile
      Exit Function
    End If
    nRow = nRow + 1
  Loop
End Function

Public Function SubstituteLinks(nDelete&, nSubstitute&)
  Dim lnksSht As Excel.Worksheet: Set lnksSht = ThisWorkbook.Sheets(HT03_SHT_LINKS)
  Dim nRow&: nRow = HT03_DEFAULT_FIRST_LINE
  Do
    Dim sID$: sID = lnksSht.Cells(nRow, S_L_TO_ID)
    If sID = vbNullString Then _
      Exit Do
    If sID = nDelete Then _
      lnksSht.Cells(nRow, S_L_TO_ID) = nSubstitute
    nRow = nRow + 1
  Loop
End Function