Implement JsonSchema for std::time types

schemars/src/json_schema_impls/mod.rs

@@ -15,4 +15,5 @@ mod maps;
 mod primitives;
 mod sequences;
 mod serdejson;
+mod time;
 mod tuple;

schemars/src/json_schema_impls/time.rs

@@ -0,0 +1,34 @@
+use crate::gen::SchemaGenerator;
+use crate::schema::*;
+use crate::JsonSchema;
+use std::time::{Duration, SystemTime};
+
+impl JsonSchema for Duration {
+    fn schema_name() -> String {
+        "Duration".to_owned()
+    }
+
+    fn json_schema(gen: &mut SchemaGenerator) -> Schema {
+        let mut schema = SchemaObject::default();
+        schema.instance_type = Some(InstanceType::Object.into());
+        let properties = &mut schema.object().properties;
+        properties.insert("secs".to_owned(), <u64>::json_schema(gen));
+        properties.insert("nanos".to_owned(), <u32>::json_schema(gen));
+        schema.into()
+    }
+}
+
+impl JsonSchema for SystemTime {
+    fn schema_name() -> String {
+        "SystemTime".to_owned()
+    }
+
+    fn json_schema(gen: &mut SchemaGenerator) -> Schema {
+        let mut schema = SchemaObject::default();
+        schema.instance_type = Some(InstanceType::Object.into());
+        let properties = &mut schema.object().properties;
+        properties.insert("secs_since_epoch".to_owned(), <u64>::json_schema(gen));
+        properties.insert("nanos_since_epoch".to_owned(), <u32>::json_schema(gen));
+        schema.into()
+    }
+}

schemars/tests/expected/duration_and_systemtime.json

@@ -0,0 +1,45 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "MyStruct",
+  "type": "object",
+  "required": [
+    "duration",
+    "time"
+  ],
+  "properties": {
+    "duration": {
+      "$ref": "#/definitions/Duration"
+    },
+    "time": {
+      "$ref": "#/definitions/SystemTime"
+    }
+  },
+  "definitions": {
+    "Duration": {
+      "type": "object",
+      "properties": {
+        "nanos": {
+          "type": "integer",
+          "format": "uint32"
+        },
+        "secs": {
+          "type": "integer",
+          "format": "uint64"
+        }
+      }
+    },
+    "SystemTime": {
+      "type": "object",
+      "properties": {
+        "nanos_since_epoch": {
+          "type": "integer",
+          "format": "uint32"
+        },
+        "secs_since_epoch": {
+          "type": "integer",
+          "format": "uint64"
+        }
+      }
+    }
+  }
+}

schemars/tests/time.rs

@@ -0,0 +1,15 @@
+mod util;
+use schemars::JsonSchema;
+use util::*;
+use std::time::{Duration, SystemTime};
+
+#[derive(Debug, JsonSchema)]
+struct MyStruct {
+    duration: Duration,
+    time: SystemTime,
+}
+
+#[test]
+fn duration_and_systemtime() -> TestResult {
+    test_default_generated_schema::<MyStruct>("duration_and_systemtime")
+}