Move wizard code out of dialog_main.py

Create the new python module to host the aforementioned code.

image_creator/dialog_main.py

@@ -48,6 +48,7 @@ from image_creator.disk import Disk
 from image_creator.os_type import os_cls
 from image_creator.kamaki_wrapper import Kamaki, ClientError
 from image_creator.help import get_help_file
+from image_creator.dialog_wizard import wizard
 
 MSGBOX_WIDTH = 60
 YESNO_WIDTH = 50
@@ -798,10 +799,6 @@ def select_file(d, media):
     return media
 
 
-def wizard(session):
-    pass
-
-
 def image_creator(d):
 
     usage = "Usage: %prog [options] [<input_media>]"

image_creator/dialog_wizard.py

+#!/usr/bin/env python
+
+# Copyright 2012 GRNET S.A. All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or
+# without modification, are permitted provided that the following
+# conditions are met:
+#
+#   1. Redistributions of source code must retain the above
+#      copyright notice, this list of conditions and the following
+#      disclaimer.
+#
+#   2. Redistributions in binary form must reproduce the above
+#      copyright notice, this list of conditions and the following
+#      disclaimer in the documentation and/or other materials
+#      provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
+# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
+# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+# The views and conclusions contained in the software and
+# documentation are those of the authors and should not be
+# interpreted as representing official policies, either expressed
+# or implied, of GRNET S.A.
+
+import dialog
+
+class WizardPage:
+    NEXT = 1
+    PREV = -1
+
+    def __init__(self, session, title):
+        self.session = session
+        self.title = title
+
+    def run(self):
+        raise NotImplementedError
+
+
+class ImageName(WizardPage):
+    def run(self):
+        d = self.session['dialog']
+        w = self.session['wizard']
+        
+        init = w['ImageName'] if 'ImageName' in w else ""
+        while 1:
+            (code, answer) = d.inputbox("Please provide a name for the image:",
+                                        init=init, width=INPUTBOX_WIDTH,
+                                        ok_label="Next", cancel="Back",
+                                        title=self.title)
+
+            if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
+                return self.PREV
+
+            name = answer.strip()
+            if len(name) == 0:
+                d.msgbox("Image name cannot be empty", width=MSGBOX_WIDTH)
+                continue
+            w['ImageName'] = name
+            break
+
+        return self.NEXT
+
+
+class ImageDescription(WizardPage):
+    def run(self):
+        d = self.session['dialog']
+        w = self.session['wizard']
+
+        init = w['ImageDescription'] if 'ImageDescription' in w else ""
+
+        while 1:
+            (code, answer) = d.inputbox(
+                                "Please provide a description for the image:",
+                                init=init, width=INPUTBOX_WIDTH,
+                                ok_label="Next", cancel="Back",
+                                title=self.title)
+
+            if code in (d.DIALOG_CANCEL, d.DIALOG_ESC):
+                return self.PREV
+
+            name = answer.strip()
+            if len(filename) == 0:
+                # Description is allowed to be empty
+                del w['ImageDescription']
+            else:
+                w['ImageDescription'] = name
+            break
+
+        return self.NEXT
+
+
+def wizard(session):
+    session['wizard'] = {}
+
+    steps = []
+    steps.append(ImageName(session, "(1/5) Image Name"))
+    steps.append(ImageDescription(session, "(2/5) Image Description"))
+
+    return True
+
+
+# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :