more better well factoredness

app/helpers/service_helper.py

@@ -64,3 +64,15 @@ def solution_to_file(buffer, total_form_items, forms):
 
 def key_to_uuid(key):
   return re.split("_", key)[0]
+
+def solution_items(variables, solver_run):
+  form_items = []
+
+  for v in variables:
+    if v.varValue > 0:
+      item_id = v.name.replace('Item_', '')
+      item = solver_run.get_item(item_id)
+      # add item to list and then remove from master item list
+      form_items.append(item)
+
+  return form_items

app/helpers/solver_helper.py

@@ -0,0 +1,23 @@
+from pulp import lpSum
+
+def build_constraints(solver_run, problem, items):
+  total_form_items = solver_run.total_form_items
+  constraints = solver_run.constraints
+
+  for constraint in constraints:
+    attribute = constraint.reference_attribute
+    min = constraint.minimum
+    max = constraint.maximum
+
+    con = dict(zip([item.id for item in solver_run.items], 
+                   [item.attribute_exists(attribute)
+                   for item in solver_run.items]))
+    # print([con[item.id] * items[item.id] for item in solver_items])
+    problem += lpSum([con[item.id]
+                     * items[item.id]
+                     for item in solver_run.items]) >= round(total_form_items * (min / 100)), f'{attribute.id} - {attribute.value} - min'
+    problem += lpSum([con[item.id]
+                     * items[item.id]
+                     for item in solver_run.items]) <= round(total_form_items * (max / 100)), f'{attribute.id} - {attribute.value} - max'
+
+  return problem