IMPLEMENTATION MODULE Sales;
(*
        Copyright (C) 1988,1989 Jensen & Partners International
*)

IMPORT FIO, Str, IO, Misc, Globals, Window, Client, Items, Btree, Lib;
FROM Globals IMPORT WriteAt, PromptFore, DisplayBorder,
                    DisplayFore, DisplayBack, GetMenu, TaxRate,
                    DataFore, DataBack, ItemIndex, ItemData,
                    ClientData, ClientIndex;
FROM Window IMPORT GotoXY, WinType, TextColor, TextBackground,
                   ClrEol, Use, Used, PutOnTop, Open, WinDef,
                   Black, White, SingleFrame, DoubleFrame, SetFrame,
                   SetTitle, CenterLowerTitle, CursorOn, CursorOff,
                   Hide;
CONST
  MAX_ROWS = 15;
  FIRST_ROW = 6;

TYPE
   SalesRec = RECORD
            Item : Items.ItemRec;
            Qty  : CARDINAL;
         END;

VAR
  SaleItems : ARRAY[FIRST_ROW..MAX_ROWS] OF SalesRec;
  SummaryFile : FIO.File;
  year, month, day : CARDINAL;
  weekday : Lib.DayType;
  misc : ARRAY[0..3] OF CHAR;
  ok : BOOLEAN;
  SalesWin, lastWin : WinType;
  SummaryWin, psumWin : WinType;
  OnScreen : BOOLEAN;
  keyPressed : CHAR;
  blankItem : Items.ItemRec;
  CurrentTotals : TotalRec;
  SubTotal, GrandTotal, SalesTax : LONGREAL;

PROCEDURE PressAKey( txt : ARRAY OF CHAR);
VAR
  ch : CHAR;
BEGIN
    TextColor(PromptFore);
    TextBackground(DisplayBack);
    WriteAt(MAX_ROWS+1,1,txt);
    GotoXY(30,MAX_ROWS+1);
    ch := IO.RdKey();
    GotoXY(1,MAX_ROWS+1);
    ClrEol();
    keyPressed := CAP(ch);
END PressAKey;


PROCEDURE Template();
(*
        This procedure un-hides the item display window and displays
        the field names.
*)
VAR
  x : CARDINAL;
BEGIN
    lastWin := Used();
    Use(SalesWin);
    PutOnTop(SalesWin);
    Clear();
    OnScreen := TRUE;
    IF FIO.Exists(TotalFile) THEN
       SummaryFile := FIO.Open(TotalFile);
       FIO.Seek(SummaryFile,0);
       x := FIO.RdBin(SummaryFile,CurrentTotals,SIZE(TotalRec));
       FIO.Close(SummaryFile);
    ELSE
       WITH CurrentTotals DO
          TotalDollars := 0.0;
          TotalCash := 0.0;
          TotalCharge := 0.0;
          NumTrans := 0;
       END;
    END;
END Template;

PROCEDURE Clear();
(**
  Clear information off the Sales screen
**)
VAR
  i : CARDINAL;
BEGIN
    TextColor(DataFore);
    TextBackground(DataBack);
    WriteAt(1,11,"          ");
    WriteAt(1,37,"               ");
    WriteAt(1,63,"          ");
    WriteAt(2,11,"             ");
    WriteAt(2,40,"          ");
    FOR i := FIRST_ROW TO MAX_ROWS DO
        WriteAt(i,3,"          ");
        WriteAt(i,16,"                         ");
        WriteAt(i,45,"     ");
        WriteAt(i,53,"          ");
        WriteAt(i,66,"          ");
    END;
    WriteAt(MAX_ROWS+2,45,"          ");
    WriteAt(MAX_ROWS+2,66,"          ");
END Clear;

PROCEDURE DisplayClient( aClient : Client.ClientRec);
VAR
  S : ARRAY[0..9] OF CHAR;
  ok : BOOLEAN;
BEGIN
    TextColor(DataFore);
    TextBackground(DataBack);
    WriteAt(1,11,"          ");
    WriteAt(1,37,"               ");
    WriteAt(1,63,"          ");
    WriteAt(2,11,"             ");
    WriteAt(2,40,"          ");
    WITH aClient DO
       WriteAt(1,11,CNum);
       WriteAt(1,37,LName);
       WriteAt(1,63,FName);
       WriteAt(2,11,Phone);
       WriteAt(2,40,"          ");
       Str.FixRealToStr(Balance,2,S,ok);
       IF ok = FALSE THEN
          WriteAt(2,40,"???");
       ELSE
          WriteAt(2,40,S);
       END;
    END;
END DisplayClient;

PROCEDURE GetClient( VAR aClient : Client.ClientRec ) : BOOLEAN;
VAR
  CNum               : Globals.FileKey;
  ReEnter,
  GotClient          : BOOLEAN;
  ch                 : CHAR;
BEGIN
   GotClient := FALSE;
   CNum := "";
   REPEAT (* until GotClient *)
      ReEnter := FALSE;
      Clear();
      GotoXY(11,1);  Misc.InputStr(CNum, 10);
      IF CNum[0] <= ' ' THEN (* cancel the transaction *)
         RETURN FALSE;
      ELSE (* a CNum was entered *)
         IF Btree.Find(ClientIndex,CNum,aClient) THEN
            DisplayClient(aClient);
            GotClient := TRUE;
         ELSIF Btree.Search(ClientIndex,CNum,aClient) THEN
            REPEAT
               DisplayClient(aClient);
               GetMenu("T)his One, N)ext, P)revious, or R)e-enter? ",
                        Globals.CharSet{'T','N','P'},ch);
               CASE ch OF
                    'T' : GotClient := TRUE;
                  | 'N' : IF Btree.Next(ClientIndex,aClient) THEN
                             DisplayClient(aClient);
                          ELSE
                             Globals.Beep();
                          END;
                  | 'P' : IF Btree.Prev(ClientIndex,aClient) THEN
                             DisplayClient(aClient);
                          ELSE
                             Globals.Beep();
                          END;
                  | 'R' : ReEnter := TRUE;
               ELSE
                     Globals.Beep();
               END;  (* case *)
            UNTIL GotClient OR ReEnter;
         ELSE
            Globals.Beep();  Globals.Beep();  Globals.Beep();
            PressAKey("That client is not in our records!");
            TextColor(DataFore);
            TextBackground(DataBack);
         END;
      END;
   UNTIL GotClient;
   RETURN TRUE;
END GetClient;


PROCEDURE DisplayItem( row : CARDINAL; anItem : Items.ItemRec );
VAR
  ok : BOOLEAN;
  S : ARRAY[0..9] OF CHAR;
BEGIN
    TextColor(DataFore);
    TextBackground(DataBack);
    WriteAt(row,16,anItem.Description);
    WriteAt(row,53,"          ");
    Str.FixRealToStr(anItem.Retail,2,S,ok);
    IF ok = FALSE THEN
       WriteAt(row,53,"???");
    ELSE
       WriteAt(row,53,S);
    END;
END DisplayItem;


PROCEDURE GetOneItem( row: CARDINAL;
                      VAR anItem : Items.ItemRec ): BOOLEAN;
VAR
  item : Globals.FileKey;
  ReEnter,
  GotItem : BOOLEAN;
  ch : CHAR;
BEGIN
   GotItem := FALSE;
   Str.Copy(item,"");
   REPEAT
      ReEnter := FALSE;
      GotoXY(3,row);  Misc.InputStr(item,10);
      IF item[0] <= ' ' THEN (* cancel the transaction *)
         RETURN FALSE;
      ELSE (* an item number was entered *)
         IF Btree.Find(ItemIndex,item,anItem) THEN
            DisplayItem(row,anItem);
            GotItem := TRUE;
         ELSIF Btree.Search(ItemIndex,item,anItem) THEN
            REPEAT
               DisplayItem(row,anItem);
               GetMenu("T)his One, N)ext, P)revious, or R)e-enter? ",
                        Globals.CharSet{'T','N','P'},ch);
               CASE ch OF
                    'T' : GotItem := TRUE;
                  | 'N' : IF Btree.Next(ItemIndex,anItem) THEN
                             DisplayItem(row,anItem);
                          ELSE
                             Globals.Beep();
                          END;
                  | 'P' : IF Btree.Prev(ItemIndex,anItem) THEN
                             DisplayItem(row,anItem);
                          ELSE
                             Globals.Beep();
                          END;
                  | 'R' : ReEnter := TRUE;
               ELSE
                     Globals.Beep();
               END;  (* case *)
            UNTIL GotItem OR ReEnter;
         ELSE
            Globals.Beep();  Globals.Beep();  Globals.Beep();
            PressAKey("That item is not in our records!");
            TextColor(DataFore);
            TextBackground(DataBack);
         END;
      END;
   UNTIL GotItem;
   RETURN TRUE;
END GetOneItem;

PROCEDURE GetSaleItem( VAR which : CARDINAL;
                       VAR action : CARDINAL ) : BOOLEAN;
VAR
  item : Items.ItemRec;
  qty : CARDINAL;
  qtyStr : ARRAY[0..4] OF CHAR;
  ok : BOOLEAN;
  ch : CHAR;
  thisTotal : LONGREAL;
  S : ARRAY[0..10] OF CHAR;
BEGIN
   action := 0;
   ok := FALSE;
   qtyStr := "1";
   IF GetOneItem(which,item) THEN
      REPEAT
         WriteAt(which,45,"     ");
         GotoXY(45,which);  Misc.InputStr(qtyStr,5);
         qty := CARDINAL(Str.StrToCard(qtyStr,10,ok));
      UNTIL ok;
      SaleItems[which].Qty := qty;
      SaleItems[which].Item := item;
      thisTotal := LONGREAL(qty) * item.Retail;
      WriteAt(which,66,"          ");
      Str.FixRealToStr(thisTotal,2,S,ok);
      IF ok = FALSE THEN
         WriteAt(which,66,"???");
      ELSE
         WriteAt(which,66,S);
      END;
      SubTotal := SubTotal + thisTotal;
      SalesTax := (SubTotal * TaxRate)/100.0;
      GrandTotal := SubTotal + SalesTax;

      WriteAt(MAX_ROWS+2,45,"          ");
      WriteAt(MAX_ROWS+2,66,"          ");
      Str.FixRealToStr(SalesTax,2,S,ok);
      IF ok = FALSE THEN
         WriteAt(MAX_ROWS+2,45,"???");
      ELSE
         WriteAt(MAX_ROWS+2,45,S);
      END;
      Str.FixRealToStr(GrandTotal,2,S,ok);
      IF ok = FALSE THEN
         WriteAt(MAX_ROWS+2,66,"???");
      ELSE
         WriteAt(MAX_ROWS+2,66,S);
      END;

   END;
   GetMenu("C)ancel item, N)o Sale, A)nother item, D)one with sale: ",
            Globals.CharSet{'C','N','A','D'},ch);
   CASE ch OF
        'D' : RETURN TRUE;
      | 'A' : RETURN FALSE;
      | 'C' : DEC(which);
              DisplayItem(which+1,blankItem);
              WriteAt(which+1,45,"     ");
              WriteAt(which+1,66,"          ");
      | 'N' : action := 99;
              RETURN TRUE;
      ELSE
         Globals.Beep();
   END;
   RETURN FALSE;
END GetSaleItem;


PROCEDURE Work();
(**
  Perform the entry of sales, information requests, etc.
  Template should be called first to open the window.
**)
VAR
  theClient          : Client.ClientRec;
  ch                 : CHAR;
  transDone          : BOOLEAN;
  choice, i,
  row                : CARDINAL;
BEGIN
   SubTotal := 0.0;
   GrandTotal := 0.0;
   SalesTax := 0.0;
   IF GetClient(theClient) THEN
      transDone := FALSE;
      FOR row := FIRST_ROW TO MAX_ROWS DO
          SaleItems[row].Qty := 0;
      END;
      row := FIRST_ROW;
      REPEAT
         transDone := GetSaleItem( row, choice );
         INC(row);
      UNTIL (transDone) OR (row>MAX_ROWS);
      IF choice = 0 THEN
         (* take the cash or charge *)
         GetMenu("Will that be C)ash or cH)arge? ",
                  Globals.CharSet{'C','H'},ch);
         CASE ch OF
              'C' : CurrentTotals.TotalCash :=
                    CurrentTotals.TotalCash + GrandTotal;
            | 'H' : CurrentTotals.TotalCharge :=
                    CurrentTotals.TotalCharge + GrandTotal;
                    theClient.Balance := theClient.Balance +
                                         GrandTotal;
                    Btree.Delete(ClientData);
                    Btree.Add(ClientData,theClient,SIZE(Client.ClientRec));
            ELSE
               Globals.Beep();
         END;
         CurrentTotals.TotalDollars :=
                       CurrentTotals.TotalDollars + GrandTotal;
         INC(CurrentTotals.NumTrans);
      ELSE
         (* cancel transaction *)
         Clear();
      END;
   END;  (* if *)
END Work;

PROCEDURE Summary();
(**
  Summarize current sales figures in a window
**)
VAR
  SummaryWin, psumWin : WinType;
  ch : CHAR;
  S : ARRAY[0..10] OF CHAR;
  ok : BOOLEAN;
BEGIN
   psumWin := Used();
   SummaryWin := Open( WinDef( 28, 10, 52, 17,
           White,Black,TRUE,FALSE,TRUE,TRUE,
           SingleFrame,White,Black) );
   SetFrame(SummaryWin,DoubleFrame,DataFore,
           DataBack);
   SetTitle(SummaryWin,"Daily Totals",CenterLowerTitle);
   Use(SummaryWin);
   CursorOff();
   TextColor(DataFore);
   TextBackground(DataBack);
   Window.Clear();
   WriteAt(2,3,"Total Sales:  $");
   WriteAt(3,3,"Cash Sales:    ");
   WriteAt(4,3,"Charge Sales:  ");
   WriteAt(5,3,"# Trans:       ");
   PutOnTop(SummaryWin);
   (* write out the current totals *)
   WITH CurrentTotals DO
      Str.FixRealToStr(TotalDollars,2,S,ok);
      WriteAt(2,18,S);
      Str.FixRealToStr(TotalCash,2,S,ok);
      WriteAt(3,18,S);
      Str.FixRealToStr(TotalCharge,2,S,ok);
      WriteAt(4,18,S);
      GotoXY(18,5);
      IO.WrCard(NumTrans,4);
   END;
   ch := IO.RdKey();
   Window.Close(SummaryWin);
   PutOnTop(psumWin);
   Use(psumWin);
   CursorOn();
END Summary;

PROCEDURE Close();
(**
  Remove the Sales screen from the screen
**)
BEGIN
    Hide(SalesWin);
    Use(lastWin);
    PutOnTop(lastWin);
    OnScreen := FALSE;
    (* write out summary file *)
    SummaryFile := FIO.Create(TotalFile);
    FIO.Seek(SummaryFile,0);
    FIO.WrBin(SummaryFile,CurrentTotals,SIZE(TotalRec));
    FIO.Close(SummaryFile);
END Close;

BEGIN (* init code *)

(* set up the summary file name *)
   TotalFile := "000000.TOT";   (* default name *)

   Lib.GetDate(year,month,day,weekday);
   IF year > 1900 THEN year := year - 1900;  END;

   Str.CardToStr(LONGCARD(year),misc,10,ok);
   IF misc[1] = 0C THEN
      TotalFile[4] := '0';
      TotalFile[5] := misc[0];
   ELSE
      TotalFile[4] := misc[0];
      TotalFile[5] := misc[1];
   END;

   Str.CardToStr(LONGCARD(month),misc,10,ok);
   IF misc[1] = 0C THEN
      TotalFile[0] := '0';
      TotalFile[1] := misc[0];
   ELSE
      TotalFile[0] := misc[0];
      TotalFile[1] := misc[1];
   END;

   Str.CardToStr(LONGCARD(day),misc,10,ok);
   IF misc[1] = 0C THEN
      TotalFile[2] := '0';
      TotalFile[3] := misc[0];
   ELSE
      TotalFile[2] := misc[0];
      TotalFile[3] := misc[1];
   END;

(* create the sales window *)

    SalesWin := Open( WinDef( 0, 4, 79, 22,
            White,Black,TRUE,FALSE,TRUE,TRUE,
            SingleFrame,White,Black) );
    SetFrame(SalesWin,SingleFrame,DisplayBorder,
            DisplayBack);
    Use(SalesWin);
    TextColor(DisplayFore);
    TextBackground(DisplayBack);
    Window.Clear();
    WriteAt(1,3,"Client:");
    WriteAt(2,3,"Phone:");
    WriteAt(1,30,"Last:");
    WriteAt(1,55,"First:");
    WriteAt(2,30,"Balance:");
    WriteAt(4,3,"ITEM");
    WriteAt(4,16,"DESCRIPTION");
    WriteAt(4,45,"QTY");
    WriteAt(4,53,"EACH");
    WriteAt(4,66,"TOTAL");
    WriteAt(17,40,"TAX:");
    WriteAt(17,57,"TOTAL:");

    blankItem.Retail := 0.0;
    blankItem.Description := "                         ";

END Sales.