Refactory of private functions

schemars/src/_private.rs

@@ -0,0 +1,49 @@
+use crate::flatten::Merge;
+use crate::gen::SchemaGenerator;
+use crate::schema::{Metadata, Schema, SchemaObject};
+use crate::JsonSchema;
+
+// Helper for generating schemas for flattened `Option` fields.
+pub fn json_schema_for_flatten<T: ?Sized + JsonSchema>(gen: &mut SchemaGenerator) -> Schema {
+    let mut schema = T::_schemars_private_non_optional_json_schema(gen);
+    if T::_schemars_private_is_option() {
+        if let Schema::Object(SchemaObject {
+            object: Some(ref mut object_validation),
+            ..
+        }) = schema
+        {
+            object_validation.required.clear();
+        }
+    }
+    schema
+}
+
+// Helper for generating schemas for `Option` fields.
+pub fn add_schema_as_property<T: ?Sized + JsonSchema>(
+    gen: &mut SchemaGenerator,
+    parent: &mut SchemaObject,
+    name: String,
+    metadata: Option<Metadata>,
+    required: bool,
+) {
+    let mut schema = gen.subschema_for::<T>();
+    schema = apply_metadata(schema, metadata);
+
+    let object = parent.object();
+    if required && !T::_schemars_private_is_option() {
+        object.required.insert(name.clone());
+    }
+    object.properties.insert(name, schema);
+}
+
+pub fn apply_metadata(schema: Schema, metadata: Option<Metadata>) -> Schema {
+    match metadata {
+        None => schema,
+        Some(ref metadata) if *metadata == Metadata::default() => schema,
+        Some(metadata) => {
+            let mut schema_obj = schema.into_object();
+            schema_obj.metadata = Some(Box::new(metadata)).merge(schema_obj.metadata);
+            Schema::Object(schema_obj)
+        }
+    }
+}