implemented function for handling schema_template item

pype/tools/settings/settings/widgets/lib.py

@@ -151,6 +151,45 @@ def _fill_schema_template_data(
         raise SchemaTemplateMissingKeys(missing_keys, required_keys)
 
     return output
+
+
+def _fill_schema_template(child_data, schema_collection, schema_templates):
+    template_name = child_data["name"]
+    template = schema_templates.get(template_name)
+    if template is None:
+        if template_name in schema_collection:
+            raise KeyError((
+                "Schema \"{}\" is used as `schema_template`"
+            ).format(template_name))
+        raise KeyError("Schema template \"{}\" was not found".format(
+            template_name
+        ))
+
+    template_data = child_data.get("template_data") or {}
+    try:
+        filled_child = _fill_schema_template_data(
+            template, template_data
+        )
+
+    except SchemaTemplateMissingKeys as exc:
+        raise SchemaTemplateMissingKeys(
+            exc.missing_keys, exc.required_keys, template_name
+        )
+
+    output = []
+    for item in filled_child:
+        filled_item = _fill_inner_schemas(
+            item, schema_collection, schema_templates
+        )
+        if filled_item["type"] == "schema_template":
+            output.extend(_fill_schema_template(
+                filled_item, schema_collection, schema_templates
+            ))
+        else:
+            output.append(filled_item)
+    return output
+
+
 def _fill_inner_schemas(schema_data, schema_collection):
     if schema_data["type"] == "schema":
         raise ValueError("First item in schema data can't be schema.")