holman · October 31, 2024 21:55 · Oct 31, 2024
diff --git a/instantiate.rb b/instantiate.rb
@@ -0,0 +1,63 @@
+module Instantiate
+
+  def instantiate(created_by, parent = nil, starting_position = nil, starting_page = 0, root_parent = nil, position = 0)
+    attrs = {:created_by => created_by, :position => position + 1, 
+      :based_on => self, :display_position => nil,
+      :root_parent => root_parent, :uncalculated_state => self.state}
+    pages_added = 0
+    i = if parent.nil?
+      Instance.new(attrs)
+    else
+      parent.children.build(attrs)
+    end
+    # The first item (the Assessment) needs to be set at position 1 and set the root_parent
+    if root_parent.nil?
+      pages_added += 1
+      root_parent = i
+      i.page = 1
+    else
+      # start on its own page if it is displayable
+      if self.displayable?
+        pages_added += 1
+        i.page = (starting_page + pages_added)
+      end
+    end
+
+    qs_per_page = i.questions_per_page
+    qs_per_page = (qs_per_page == 0 ? 1 : qs_per_page)
+
+    items_created = 1 # this instance is the first item
+    nodes_added = 0 # only questions count as displayable nodes
+    question_count = 0 # count of consecutive child questions
+    max_page = (i.page || starting_page)
+
+    contents_for_instantiation.each do |c|
+      if question_count % qs_per_page == 0 and c.kind_of?(Question)
+        # start a new page if this is the first question on the page
+        pages_added += 1
+        question_count = 0
+      end
+
+      starting_position ||= 1
+
+      child, child_nodes, child_pages, child_max_page, child_items_created = c.instantiate(created_by, i, starting_position + nodes_added, starting_page + pages_added, root_parent, position + items_created)
+      # reset counter if its a section, increment if question
+      question_count = child.kind_of?(Section) ? 0 : question_count + 1
+
+      items_created += child_items_created
+      nodes_added += child_nodes
+      pages_added += child_pages
+      max_page = child_max_page
+    end
+    i.max_page = max_page
+    i.question_count = nodes_added
+
+    if i == root_parent
+      i.save!
+      i.update_attribute(:root_parent, i)
+    end
+
+    return i, nodes_added, ((self.kind_of?(Section) and self.displayable?) ? pages_added + 1 : pages_added), ((self.kind_of?(Section) and self.displayable?) ? max_page + 1 : max_page), items_created
+  end
+
+end