erp5_catalog: Migration script to move catalog to new ERP5Catalog object.

What we expect during migration:
1. Copy objects as well as properties from SQLCatalog to ERP5Catalog
2. Migration of SQL Methods and Python Scripts as ERP5 objects
3. Update migration with filter_dict for methods

The migration function would now create portal_catalog based on
'Catalog Tool' portal_type and after that it'll migrate the objects
(catalog, SQL Method, Python Scripts) in it.

Also, update BusinessTemplate fucntions according to changes made after migration

product/ERP5/Document/BusinessTemplate.py

@@ -152,12 +152,12 @@ SEPARATELY_EXPORTED_PROPERTY_DICT = {
 
 def _getCatalog(acquisition_context):
   """
-    Return the id of the SQLCatalog which correspond to the current BT.
+    Return the id of the Catalog which correspond to the current BT.
   """
   catalog_method_id_list = acquisition_context.getTemplateCatalogMethodIdList()
   if len(catalog_method_id_list) == 0:
     try:
-      return acquisition_context.getPortalObject().portal_catalog.objectIds('SQLCatalog')[0]
+      return acquisition_context.getPortalObject().portal_catalog.objectIds()[0]
     except IndexError:
       return None
   catalog_method_id = catalog_method_id_list[0]
@@ -1461,7 +1461,7 @@ class ObjectTemplateItem(BaseTemplateItem):
               # an object which cannot (e.g. External Method).
               LOG('BusinessTemplate', WARNING,
                   'could not restore %r in %r' % (subobject_id, obj))
-        if obj.meta_type in ('Z SQL Method',):
+        if obj.meta_type in ('Z SQL Method', 'ERP5 SQL Method'):
           fixZSQLMethod(portal, obj)
         # portal transforms specific initialization
         elif obj.meta_type in ('Transform', 'TransformsChain'):
@@ -1953,7 +1953,7 @@ class SkinTemplateItem(ObjectTemplateItem):
       if not force and update_dict.get(relative_url)  == 'nothing':
         continue
       folder = self.unrestrictedResolveValue(p, relative_url)
-      for obj in folder.objectValues(spec=('Z SQL Method',)):
+      for obj in folder.objectValues(spec=('Z SQL Method', 'ERP5 SQL Method')):
         fixZSQLMethod(p, obj)
       if folder.aq_parent.meta_type == 'CMF Skins Tool':
         registerSkinFolder(skin_tool, folder)
@@ -2893,14 +2893,26 @@ class CatalogMethodTemplateItem(ObjectTemplateItem):
     """Extracts properties for a given method in the catalog.
     Returns a mapping of property name -> boolean """
     method_properties = PersistentMapping()
-    for prop in catalog._properties:
+    property_list = list(catalog._properties)
+    if catalog.meta_type == 'ERP5 Catalog':
+      property_list = list(catalog.propertyMap())
+    for prop in property_list:
       if prop.get('select_variable') == 'getCatalogMethodIds':
+        # In case the properties are defined via property sheet 'Catalog', the
+        # object would have two IDs if it is of type 'selection' or
+        # 'multiple_selection': 'id' and 'base_id', usage of base_id is preferred
+        # while building objects as it maintains consistency between the old
+        # catalog and new erp5 catalog
+        if prop.has_key('base_id'):
+          id_key = 'base_id'
+        else:
+          id_key = 'id'
         if prop['type'] == 'selection' and \
-            getattr(catalog, prop['id']) == method_id:
-          method_properties[prop['id']] = 1
+            getattr(catalog, prop[id_key]) == method_id:
+          method_properties[prop[id_key]] = 1
         elif prop['type'] == 'multiple selection' and \
-            method_id in getattr(catalog, prop['id']):
-          method_properties[prop['id']] = 1
+            method_id in getattr(catalog, prop[id_key]):
+          method_properties[prop[id_key]] = 1
     return method_properties
 
   def build(self, context, **kw):
@@ -2919,7 +2931,10 @@ class CatalogMethodTemplateItem(ObjectTemplateItem):
       method_id = obj.id
       self._method_properties[method_id] = self._extractMethodProperties(
                                                           catalog, method_id)
-      filter = catalog.filter_dict.get(method_id, {})
+      filter_dict = catalog.filter_dict
+      if catalog.meta_type == 'ERP5 Catalog':
+        filter_dict = catalog.getFilterDict()
+      filter = filter_dict.get(method_id, {})
       self._is_filtered_archive[method_id] = filter.get('filtered', 0)
       for method in catalog_method_filter_list:
         property = method[8:-8]
@@ -2978,6 +2993,26 @@ class CatalogMethodTemplateItem(ObjectTemplateItem):
     force = kw.get('force')
     values = []
 
+    # When the default catalog is of 'ERP5 Catalog' meta_type, its better to ..
+    # convert all the CatalogMethodTemplateItems in the current BT to the
+    # allowed types for ERP5 Catalog, i.e, to ERP5 SQLMethod and ERP5 Python Script
+    # and update the self._objects dict accordingly
+    if catalog.meta_type == 'ERP5 Catalog':
+      portal = self.getPortalObject()
+      # Will be modifying dict, so better to use .items()
+      # XXX: In python3 it should be .copy.items().
+      for path, obj in self._objects.items():
+        method = self.unrestrictedResolveValue(portal, path)
+        if method.meta_type == 'Z SQL Method':
+          self.convertSQLMethodToERP5SQLMethod(method)
+        if method.meta_type == 'Script (Python)':
+          self.convertPythonScriptToERP5PythonScript(method)
+        # Check what is better option to get the method object here,
+        # path resolving or getting object from erp5 catalog
+        method = self.unrestrictedResolveValue(portal, path)
+        new_obj  = method.aq_base
+        self._objects[path] = new_obj
+
     if force: # get all objects
       values = self._objects.values()
     else: # get only selected object
@@ -3005,6 +3040,26 @@ class CatalogMethodTemplateItem(ObjectTemplateItem):
               setattr(catalog, key, tuple(new_value))
 
       # Restore filter
+      if catalog.meta_type == 'ERP5 Catalog':
+        method = catalog._getOb(method_id)
+        if self._is_filtered_archive.get(method_id, 0):
+          expression = self._filter_expression_archive[method_id]
+          if expression and expression.strip():
+            # only compile non-empty expressions
+            expr_instance = Expression(expression)
+          else:
+            expr_instance = None
+          method.setFiltered(1)
+          method.setExpression(expression)
+          method.setExpressionInstance(expr_instance)
+          method.setTypeList( \
+            self._filter_type_archive.get(method_id, ()))
+          method.setExpressionCacheKeyList( \
+            self._filter_expression_cache_key_archive.get(method_id, ()))
+        elif method_id in catalog.getFilterDict().keys():
+          method.setFiltered(0)
+
+      elif catalog.meta_type == 'SQLCatalog':
         if self._is_filtered_archive.get(method_id, 0):
           expression = self._filter_expression_archive[method_id]
           if expression and expression.strip():
@@ -3077,15 +3132,29 @@ class CatalogMethodTemplateItem(ObjectTemplateItem):
         values.append(value)
     for obj in values:
       method_id = obj.id
+      property_list = list(catalog._properties)
+      if catalog.meta_type == 'ERP5 Catalog':
+        property_list = list(catalog.propertyMap())
       # remove method references in portal_catalog
-      for catalog_prop in catalog._properties:
+      for catalog_prop in property_list:
         if catalog_prop.get('select_variable') == 'getCatalogMethodIds'\
             and catalog_prop['type'] == 'multiple selection':
-          old_value = getattr(catalog, catalog_prop['id'], ())
+          # In case the properties are defined via property sheet 'Catalog', the
+          # object would have two IDs if it is of type 'selection' or
+          # 'multiple_selection': 'id' and 'base_id', usage of base_id is preferred
+          # while building objects as it maintains consistency between the old
+          # catalog and new erp5 catalog
+          if catalog_prop.has_key('base_id'):
+            id_key = 'base_id'
+          else:
+            id_key = 'id'
+          old_value = getattr(catalog, catalog_prop[id_key], ())
           if method_id in old_value:
             new_value = list(old_value)
             new_value.remove(method_id)
-            setattr(catalog, catalog_prop['id'], new_value)
+            # Better to set the attribute value as tuple as it would be consistent
+            # with both SQL Catalog and ERP5 Catalog.
+            setattr(catalog, catalog_prop[id_key], tuple(new_value))
 
       if catalog.filter_dict.has_key(method_id):
         del catalog.filter_dict[method_id]