From efd503d99267332b49011d1127d1819592f64101 Mon Sep 17 00:00:00 2001
From: Étienne Loks <etienne.loks@iggdrasil.net>
Date: Fri, 24 Mar 2017 17:47:33 +0100
Subject: Wizard: manage readonly forms (refs #3563)

---
 ishtar_common/forms.py   | 39 +++++++++++++++++++++++++++++++++++++--
 ishtar_common/wizards.py |  2 ++
 2 files changed, 39 insertions(+), 2 deletions(-)

(limited to 'ishtar_common')

diff --git a/ishtar_common/forms.py b/ishtar_common/forms.py
index 42d74f9ef..ecae18c5e 100644
--- a/ishtar_common/forms.py
+++ b/ishtar_common/forms.py
@@ -22,6 +22,7 @@ Forms definition
 """
 import datetime
 import re
+import types
 
 from django import forms
 from django.core.urlresolvers import reverse
@@ -94,7 +95,32 @@ class FinalDeleteForm(FinalForm):
     confirm_end_msg = _(u"Are you sure you want to delete?")
 
 
+def get_readonly_clean(key):
+    def func(self):
+        instance = getattr(self, 'instance', None)
+        if instance and getattr(instance, key):
+            return getattr(instance, key)
+        else:
+            return self.cleaned_data[key]
+    return func
+
+
 class FormSet(BaseFormSet):
+    def __init__(self, *args, **kwargs):
+        self.readonly = False
+        if 'readonly' in kwargs:
+            self.readonly = kwargs.pop('readonly')
+            self.can_delete = False
+            # no extra fields
+            if 'data' in kwargs:
+                prefix = ""
+                if "prefix" in kwargs:
+                    prefix = kwargs['prefix']
+                if prefix + '-INITIAL_FORMS' in kwargs['data']:
+                    kwargs['data'][prefix + '-TOTAL_FORMS'] = \
+                        kwargs["data"][prefix + '-INITIAL_FORMS']
+        super(FormSet, self).__init__(*args, **kwargs)
+
     def check_duplicate(self, key_names, error_msg=""):
         """Check for duplicate items in the formset"""
         if any(self.errors):
@@ -117,8 +143,17 @@ class FormSet(BaseFormSet):
 
     def add_fields(self, form, index):
         super(FormSet, self).add_fields(form, index)
-        form.fields[DELETION_FIELD_NAME].label = ''
-        form.fields[DELETION_FIELD_NAME].widget = widgets.DeleteWidget()
+        if self.readonly:
+            for k in form.fields:
+                # django 1.9: use disabled
+                form.fields[k].widget.attrs['readonly'] = True
+                clean = get_readonly_clean(k)
+                clean.__name__ = 'clean_' + k
+                clean.__doc__ = 'autogenerated: clean_' + k
+                setattr(form, clean.__name__, types.MethodType(clean, form))
+        if self.can_delete:
+            form.fields[DELETION_FIELD_NAME].label = ''
+            form.fields[DELETION_FIELD_NAME].widget = widgets.DeleteWidget()
 
 
 class TableSelect(forms.Form):
diff --git a/ishtar_common/wizards.py b/ishtar_common/wizards.py
index 7950bcc7e..ddb2bc2ac 100644
--- a/ishtar_common/wizards.py
+++ b/ishtar_common/wizards.py
@@ -408,6 +408,8 @@ class Wizard(NamedUrlWizardView):
         for form in form_list:
             if not form.is_valid():
                 return self.render(form)
+            if hasattr(form, 'readonly') and form.readonly:
+                continue
             base_form = hasattr(form, 'forms') and form.forms[0] or form
             associated_models = hasattr(base_form, 'associated_models') and \
                 base_form.associated_models or {}
-- 
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