added modified checking and saving instances to the base mewa package

[clinton/lisp-on-lines.git] / src / mewa / mewa.lisp

diff --git a/src/mewa/mewa.lisp b/src/mewa/mewa.lisp
index ef3ae70..a264756 100644 (file)
--- a/src/mewa/mewa.lisp
+++ b/src/mewa/mewa.lisp
@@ -86,7 +86,6 @@ attributes is an alist keyed on the attribute nreeame."
 
 (defmethod default-attributes ((model t))
   (append (mapcar #'(lambda (s) (cons (car s) (gen-pslot (if (meta-model:foreign-key-p model (car s))
-                                                  'ucw::foreign-key
                                                   (cadr s))
                                                 (string (car s)) (car s)))) 
          (meta-model:list-slot-types model))
@@ -128,7 +127,8 @@ attributes is an alist keyed on the attribute nreeame."
     :accessor use-instance-class-p 
     :initform t)
    (initializedp :initform nil)
-   (modifiedp :accessor modifiedp :initform nil)))
+   (modifiedp :accessor modifiedp :initform nil)
+   (modifications :accessor modifications :initform nil)))
 
 
 (defmethod attributes :around ((self mewa))
@@ -215,13 +215,6 @@ attributes is an alist keyed on the attribute nreeame."
   (setf (slots self) (find-slot-presentations   self)))
   
 
-(defmethod render-on :around ((res response) (self mewa))
-  (unless (slot-value self 'initializedp)
-    (initialize-slots self))
-  (setf (slot-value self 'initializedp) t)
-  (call-next-method))
-
-
 (defmethod make-presentation ((object t) &key (type :viewer) (initargs nil))
   (let* ((p (make-instance 'mewa-object-presentation))
         (a (progn (setf (slot-value p 'instance) object)
@@ -247,6 +240,8 @@ attributes is an alist keyed on the attribute nreeame."
                                           type))
                                       (plist-union initargs (cddr a)))))
     (setf (slot-value i 'instance) object)
+    (initialize-slots i)
+    (setf (slot-value i 'initializedp) t)
     i))
 
 
@@ -263,4 +258,43 @@ attributes is an alist keyed on the attribute nreeame."
                             (slots to))))
 
 (defmacro call-presentation (object &rest args)
-  `(present-object ,object :presentation (make-presentation ,object ,@args)))
\ No newline at end of file
+  `(present-object ,object :presentation (make-presentation ,object ,@args)))
+
+
+
+(defaction cancel-save-instance ((self mewa))
+  (answer nil))
+
+(defaction save-instance ((self mewa))
+  (meta-modqel:sync-instance (instance self))
+   (setf (modifiedp self) nil)
+       (answer self))
+
+
+(defaction ok ((self mewa) &optional arg)
+  "Returns the component if it has not been modified. if it has been, prompt user to save or cancel"
+  (declare (ignore arg))
+  (when (modifiedp self)
+    (let ((message (format nil "Record has been modified, Do you wish to save the changes?<br/> ~a" (print (modifications self)))))
+      (case (call 'option-dialog 
+                 :message message
+                 :options '((:save . "Save changes to Database")
+                            (:cancel . "Cancel all changes")))
+       (:cancel
+        (cancel-save-instance self))
+       (:save 
+        (save-instance self)))))
+  (answer self))
+
+
+
+(defmethod (setf presentation-slot-value) :around (value (slot slot-presentation) instance)
+  (let* ((old (prog1 
+                (presentation-slot-value slot instance)
+              (call-next-method)))
+       (new (presentation-slot-value slot instance)))
+  
+  (unless (equal new old )
+    (let ((self (ucw::parent slot)))
+      (setf (modifiedp self) instance
+           (modifications self)  (append (list  (type-of new) (type-of old) (type-of value) slot instance )))))))
\ No newline at end of file