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312 | ------------------------------------------------------------------------------
-- --
-- GNOGA - The GNU Omnificent GUI for Ada --
-- --
-- G N O G A . S E R V E R . M O D E L --
-- --
-- B o d y --
-- --
-- --
-- Copyright (C) 2014 David Botton --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, or (at your option) any --
-- later version. This library is distributed in the hope that it will be --
-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are --
-- granted additional permissions described in the GCC Runtime Library --
-- Exception, version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- For more information please go to http://www.gnoga.com --
------------------------------------------------------------------------------
with Ada.Calendar.Formatting;
with Ada.Exceptions;
package body Gnoga.Server.Model is
----------------
-- Initialize --
----------------
overriding procedure Initialize (Object : in out Active_Record) is
use Gnoga.Server.Database;
begin
if Object.Connection = null then
raise Connection_Error;
end if;
Object.Fields := Object.Connection.List_Fields_Of_Table (Object.Table_Name.all);
end Initialize;
----------------
-- Values --
----------------
procedure Values
(A : in out Active_Record;
Map : in Gnoga.Types.Data_Maps.Map)
is
procedure foreach (Position : in Gnoga.Types.Data_Arrays.Cursor);
procedure foreach (Position : in Gnoga.Types.Data_Arrays.Cursor) is
begin
if Map.Contains (Gnoga.Types.Data_Arrays.Element (Position)) then
A.Value
(Gnoga.Types.Data_Arrays.Element (Position), Map.Element (Gnoga.Types.Data_Arrays.Element (Position)));
end if;
end foreach;
begin
A.Fields.Iterate (foreach'Access);
end Values;
-----------
-- Value --
-----------
procedure Value
(A : in out Active_Record;
Field_Name : in String;
Value : in String)
is
begin
A.Values.Include (Field_Name, Value);
end Value;
procedure Value
(A : in out Active_Record;
Field_Name : in String;
Integer_Value : in Integer)
is
begin
Value (A, Field_Name, Image (Integer_Value));
end Value;
procedure Value
(A : in out Active_Record;
Field_Name : in String;
Date_Value : in Ada.Calendar.Time)
is
V : constant String := From_ASCII (Ada.Calendar.Formatting.Image (Date_Value));
begin
Value (A, Field_Name, V);
end Value;
-----------------
-- Field_Names --
-----------------
function Field_Names
(A : Active_Record)
return Gnoga.Types.Data_Array_Type
is
begin
return A.Fields;
end Field_Names;
------------
-- Values --
------------
function Values
(A : Active_Record)
return Gnoga.Types.Data_Maps.Map
is
begin
return A.Values;
end Values;
-----------
-- Value --
-----------
function Value
(A : Active_Record;
Field_Name : String)
return String
is
begin
return A.Values.Element (Field_Name);
end Value;
------------
-- Exists --
------------
function Exists
(A : Active_Record;
Field_Name : String)
return Boolean
is
begin
return A.Values.Contains (Field_Name);
end Exists;
----------
-- Save --
----------
procedure Save (A : in out Active_Record) is
fields : String;
values : String;
procedure foreach (Position : in Gnoga.Types.Data_Maps.Cursor);
procedure foreach (Position : in Gnoga.Types.Data_Maps.Cursor) is
begin
if (Gnoga.Types.Data_Maps.Key (Position) /= "id") then
if (A.Is_New) then
fields := fields & "`" & Gnoga.Types.Data_Maps.Key (Position) & "` ,";
values := values & "'" & A.Connection.Escape_String (Gnoga.Types.Data_Maps.Element (Position)) & "',";
else
fields :=
fields & "`" & Gnoga.Types.Data_Maps.Key (Position) & "`=" & "'" &
A.Connection.Escape_String (Gnoga.Types.Data_Maps.Element (Position)) & "',";
end if;
end if;
end foreach;
begin
A.Values.Iterate (foreach'Access);
if A.Is_New then
declare
f : constant String := fields;
v : constant String := values;
Insert_String : constant String :=
"insert into " & A.Table_Name.all & " (" & f.Slice (f.First, f.Last - 1) & ") VALUES (" &
v.Slice (v.First, v.Last - 1) & ")";
begin
A.Connection.Execute_Query (Insert_String);
declare
New_ID : constant String := Image (A.Connection.Insert_ID);
begin
A.Value ("id", New_ID.Slice (New_ID.First + 1, New_ID.Last));
A.Is_New := False;
end;
end;
else
declare
f : constant String := fields;
Update_String : constant String :=
"update " & A.Table_Name.all & " set " & f.Slice (f.First, f.Last - 1) & " where id=" &
A.Values.Element ("id");
begin
A.Connection.Execute_Query (Update_String);
end;
end if;
end Save;
------------
-- Delete --
------------
procedure Delete (A : in out Active_Record) is
SQL : constant String := "delete from " & A.Table_Name.all & " where id=" & A.Value ("id");
begin
A.Connection.Execute_Query (SQL);
A.Clear;
end Delete;
-----------
-- Clear --
-----------
procedure Clear (A : in out Active_Record) is
begin
A.Is_New := True;
A.Values.Clear;
end Clear;
----------
-- Find --
----------
procedure Find
(A : in out Active_Record;
ID : in Positive)
is
Key : constant String := Image (ID);
RS : Gnoga.Server.Database.Recordset'Class :=
A.Connection.Query ("select * from " & A.Table_Name.all & " where id=" & Key.Slice (Key.First + 1, Key.Last));
begin
RS.Next;
A.Is_New := False; -- If no exception is raised then this is not new
A.Values := RS.Field_Values;
RS.Close;
end Find;
procedure Find
(A : in out Active_Record;
ID : in String)
is
begin
Find (A, Value (ID));
end Find;
----------------
-- Find_Where --
----------------
procedure Find_Where
(A : in out Active_Record;
Where : in String;
Create_New : in Boolean := True)
is
RS : Gnoga.Server.Database.Recordset'Class :=
A.Connection.Query ("select * from " & A.Table_Name.all & " where " & Where & " LIMIT 1");
begin
RS.Next;
A.Is_New := False; -- If no exception is raised then this is not new
A.Values := RS.Field_Values;
RS.Close;
exception
when E : Gnoga.Server.Database.End_Of_Recordset =>
Log ("Error End_Of_Recordset.");
Log (From_UTF_8 (Ada.Exceptions.Exception_Information (E)));
if Create_New then
A.Value ("id", "");
RS.Close;
else
raise Gnoga.Server.Database.End_Of_Recordset;
end if;
end Find_Where;
---------------
-- Find_Item --
---------------
procedure Find_Item
(A : in out Active_Record;
Parent : in Active_Record'Class;
Create_New : in Boolean := True)
is
Remove_s : constant String := Parent.Table_Name.all;
Where_Clause : constant String :=
Remove_s.Slice (Remove_s.First, Remove_s.Last - 1) & "_id = " & Parent.Value ("id");
begin
A.Find_Where (Where_Clause, Create_New);
end Find_Item;
end Gnoga.Server.Model;
|