IMPLEMENTATION MODULE DBFGas;
(*
 *  ModBase
 *  Release 3.0
 *  (c) Copyright 1986 - 1991 PMI
 *  P.O. Box 8402
 *  Green Bay Wi 53308
 *  All Rights Reserved
 *  by Ed Ross  
 *)

FROM ModBase3 IMPORT InitDBF,OpenDBF,CloseDBF,ReadDBRec,GetField,DBFile,
          DefaultFixUp,NilDBF;
FROM DBCopier IMPORT  DBPack;
FROM DBIndxes IMPORT InitIndex,OpenIndex,AddToUpdateList,CloseIndex,
              CurrentRec,FindPositionCh,BuildIndex,GoTop,GoBottom,
              NextRecord,PrevRecord,CurrentKeyCh,FindPositionN,
              CurrentKeyN,InitCompIndex,BuildCompIndex,DBIndex;
FROM Drectory IMPORT DeleteFile;	
FROM StrEdit IMPORT CrunchBlanks,Append;
FROM StrConv IMPORT StrToReal;
FROM NumTypes IMPORT Real8,REALToReal8;
FROM DBStuff IMPORT MakeKey;
FROM ScanUtils IMPORT Present,CaseSens;
FROM DBFields IMPORT GetDateField,GetLogicalField,GetNumField,Replace,
     ReplaceD,ReplaceN;



CONST
  Buffer = 0;
  Safty = TRUE;
  Exclusive = FALSE;
  AutoLock = TRUE;

VAR DBInit,IndexOpen : BOOLEAN;

PROCEDURE MoveGasToDBF(Rec : GasRec );
(* This code will move the data from the record to *)
(* the data base                                   *)
BEGIN
  WITH Rec DO
    Replace( GasDBF,  1,CIN);    (* customer id number *)
    Replace( GasDBF,  2,INVNBR    );    (* Out - Invoice number *)
    Replace( GasDBF,  3,ITEMNBR   );    (* Helium type *)
    ReplaceD( GasDBF,  4,DATEOUT   );    (* Helium out date *)
    ReplaceD( GasDBF,  5,DUEDATE   );    (* Helium due date *)
    ReplaceD( GasDBF,  6,DATEIN    );    (* Helium date in *)
    Replace( GasDBF,  7,STATUS    );    (* Sequence number *)
    ReplaceN( GasDBF,  8,OVCHGAMT  );    (* over time charge amount *)
    ReplaceN( GasDBF,  9,REALToReal8(FLOAT(DAYSLATE  )));    (* Sequence number *)
    Replace( GasDBF, 10,ININVNBR  );    (* Check in invoice nubmer *)
END;  (* end of with REC *)
END MoveGasToDBF;



PROCEDURE MoveGasFromDBF(VAR Rec : GasRec );
(* This code will move the data from the Database to *)
(* the record                                        *)
VAR B : BOOLEAN;
    R : Real8;
BEGIN
  WITH Rec DO
    GetField( GasDBF,  1,CIN );   (* customer id number *)
    GetField( GasDBF,  2,INVNBR     );   (* Out - Invoice number *)
    GetField( GasDBF,  3,ITEMNBR    );   (* Helium type *)
    GetDateField( GasDBF,  4,DATEOUT   );   (* Helium out date *)
    GetDateField( GasDBF,  5,DUEDATE   );   (* Helium due date *)
    GetDateField( GasDBF,  6,DATEIN    );   (* Helium date in *)
    GetField( GasDBF,  7,STATUS     );   (* Sequence number *)
    GetNumField( GasDBF,  8,OVCHGAMT  );   (* over time charge amount *)
    GetNumField( GasDBF,  9,R);
    DAYSLATE  := TRUNC(R);   (* Sequence number *)
    GetField( GasDBF, 10,ININVNBR   );   (* Check in invoice nubmer *)
END;  (* end of with REC^ *)
END MoveGasFromDBF;

PROCEDURE MakeGasOutKey(DBF : DBFile; Idx : DBIndex;
                        VAR Key : ARRAY OF CHAR);
VAR
BEGIN			
  GetField(GasDBF,2,Key);
  MakeKey(Key);
END MakeGasOutKey;


PROCEDURE MakeGasInKey(DBF : DBFile; Idx : DBIndex;
                        VAR Key : ARRAY OF CHAR);
VAR
BEGIN			
  GetField(GasDBF,10,Key);
  MakeKey(Key);
END MakeGasInKey;


PROCEDURE MakeGasKey(  DBF : DBFile;  Idx : DBIndex;
                       VAR Key : ARRAY OF CHAR);
VAR
  B : BOOLEAN;
  Str : ARRAY[0..15] OF CHAR;
BEGIN
  GetField( GasDBF,  1,Key );   (* customer id number *)
  GetField( GasDBF,  7,Str     );   (* Sequence number *)
  Append(Key,Str);
  GetField( GasDBF,  3,Str  );   (* Helium type *)
  Append(Key,Str);
  MakeKey(Key);
END MakeGasKey;




PROCEDURE OpenGasDBF(WithIdx : BOOLEAN);
 VAR
   ER : CARDINAL;
BEGIN
  IndexOpen := WithIdx;

(* Open the DBF file *)
IF NOT DBInit THEN
  DBInit:=TRUE;
  InitDBF("Gas.DBF", GasDBF,Buffer,Safty,Exclusive,AutoLock,DefaultFixUp );
     InitCompIndex( "Gas.Idx",GasIdx,GasDBF,MakeGasKey,Buffer,
                  Safty,FALSE,Exclusive);
     AddToUpdateList( GasDBF, GasIdx );

     InitCompIndex( "GasOut.Idx",GasOutIdx,GasDBF,MakeGasOutKey,Buffer,
                  Safty,FALSE,Exclusive);
     AddToUpdateList( GasDBF, GasOutIdx );

    InitCompIndex( "GasIn.Idx",GasInIdx,GasDBF,MakeGasInKey,Buffer,
                  Safty,FALSE,Exclusive);
     AddToUpdateList( GasDBF, GasInIdx );
END;
   IF NOT OpenDBF( GasDBF)
     THEN END;

IF WithIdx
  THEN

    (* open all indexes and append to dbfile *)
     IF NOT OpenIndex( GasIdx )
       THEN
	 ER := BuildCompIndex(GasIdx,'C','Cin',20); (* check key lenght *)
       END;
     IF NOT OpenIndex( GasOutIdx )
       THEN
	 ER := BuildCompIndex(GasOutIdx,'C','Cin',20); (* check key lenght *)
       END;
     IF NOT OpenIndex( GasInIdx )
       THEN
	 ER := BuildCompIndex(GasInIdx,'C','Cin',20); (* check key lenght *)
       END;
   END;
END OpenGasDBF;



PROCEDURE CloseGasDBF ();   (* close Data and index files *)

BEGIN
  CloseDBF(GasDBF);  (* close dbf file *)
  IF IndexOpen
    THEN
 	CloseIndex(GasIdx ); (* close index file *)
    END;	
 END CloseGasDBF;



PROCEDURE FindGasByCin( Key : ARRAY OF CHAR) : BOOLEAN;
VAR Found : BOOLEAN;
    CKey : ARRAY[0..80] OF CHAR;
BEGIN
   FindPositionCh( GasIdx, Key, Found);
   CurrentKeyCh(GasIdx,CKey);
   Found := Present(Key,CKey,CaseSens);
    IF Found
       THEN ReadDBRec( GasDBF, CurrentRec( GasIdx));
   END;
   RETURN Found;
END FindGasByCin;







PROCEDURE NextGas () : BOOLEAN;
VAR
  L : LONGINT;    (* record number *)
BEGIN
  IF  NextRecord( GasIdx,L)
    THEN ReadDBRec( GasDBF,L  );
         RETURN TRUE;
    ELSE RETURN FALSE;
    END;
END NextGas;

PROCEDURE PrevGas () : BOOLEAN;
VAR
  L : LONGINT;    (* record number *)
BEGIN
  IF  PrevRecord( GasIdx,L)
    THEN ReadDBRec( GasDBF,L  );
         RETURN TRUE;
    ELSE RETURN FALSE;
    END;
END PrevGas;

PROCEDURE FirstGas ();
VAR
  L : LONGINT;    (* record number *)
BEGIN
  GoTop(GasIdx);
  ReadDBRec( GasDBF,CurrentRec(  GasIdx));
END FirstGas;

PROCEDURE LastGas ();
VAR
  L : LONGINT;    (* record number *)
BEGIN
  GoBottom(GasIdx);
  ReadDBRec( GasDBF,CurrentRec(  GasIdx));
END LastGas;

PROCEDURE PackGas();
VAR
  EM : CARDINAL;
BEGIN
  CloseGasDBF();
  OpenGasDBF(FALSE);
  DBPack(GasDBF);

  CloseDBF(GasDBF);
  EM := DeleteFile('Gas.IDX');
  OpenGasDBF(TRUE);  (* open & rebuild the index *)
  CloseGasDBF();

END PackGas;

BEGIN
  NilDBF(GasDBF);
  IndexOpen := FALSE;
  DBInit:=FALSE;

END DBFGas.