add chrono support

Cargo.lock

@@ -331,6 +331,7 @@ dependencies = [
 name = "gotham-restful"
 version = "0.0.1"
 dependencies = [
+ "chrono 0.4.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "fake 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -16,6 +16,7 @@ repository = "https://gitlab.com/msrd0/gotham-restful"
 gitlab = { repository = "msrd0/gotham-restful", branch = "master" }
 
 [dependencies]
+chrono = { version = "0.4", optional = true }
 failure = "0.1"
 futures = "0.1"
 gotham = "0.4"
@@ -34,5 +35,5 @@ log = "0.4"
 log4rs = { version = "0.8", features = ["console_appender"], default-features = false }
 
 [features]
-default = ["openapi"]
+default = ["openapi", "chrono"]
 openapi = ["indexmap", "log", "openapiv3"]

src/openapi/types.rs

@@ -1,5 +1,10 @@
+#[cfg(feature = "chrono")]
+use chrono::{
+	Date, DateTime, FixedOffset, Local, NaiveDate, NaiveDateTime, Utc
+};
 use openapiv3::{
-	ArrayType, IntegerType, NumberType, ObjectType, ReferenceOr::Item, Schema, SchemaData, SchemaKind, StringType, Type
+	ArrayType, IntegerType, NumberType, ObjectType, ReferenceOr::Item, Schema, SchemaData, SchemaKind,
+	StringFormat, StringType, Type, VariantOrUnknownOrEmpty
 };
 
 
@@ -66,7 +71,21 @@ macro_rules! str_types {
 				SchemaKind::Type(Type::String(StringType::default()))
 			}
 		}
-	)*}
+	)*};
+
+	(format = $format:ident, $($str_ty:ty),*) => {$(
+		impl OpenapiType  for $str_ty
+		{
+			fn to_schema() -> SchemaKind
+			{
+				SchemaKind::Type(Type::String(StringType {
+					format: VariantOrUnknownOrEmpty::Item(StringFormat::$format),
+					pattern: None,
+					enumeration: Vec::new()
+				}))
+			}
+		}
+	)*};
 }
 
 str_types!(String, &str);
@@ -91,3 +110,8 @@ impl<T : OpenapiType> OpenapiType for Vec<T>
 		}))
 	}
 }
+
+#[cfg(feature = "chrono")]
+str_types!(format = Date, Date<FixedOffset>, Date<Local>, Date<Utc>, NaiveDate);
+#[cfg(feature = "chrono")]
+str_types!(format = DateTime, DateTime<FixedOffset>, DateTime<Local>, DateTime<Utc>, NaiveDateTime);