impl To/FromNapiValue for HashMap

cli/src/build.ts

@@ -255,20 +255,25 @@ async function processIntermediateTypeFile(source: string, target: string) {
     }
   })
 
-  for (const [name, def] of impls.entries()) {
-    const classDef = classes.get(name)
+  for (const [name, classDef] of classes.entries()) {
+    const implDef = impls.get(name)
 
     dts += `export class ${name} {
-  ${(classDef ?? '')
+  ${classDef
     .split('\n')
     .map((line) => line.trim())
-    .join('\n  ')}
-  ${def
-    .split('\n')
-    .map((line) => line.trim())
-    .join('\n  ')}
-}
-`
+    .join('\n  ')}`
+
+    if (implDef) {
+      dts +=
+        '\n  ' +
+        implDef
+          .split('\n')
+          .map((line) => line.trim())
+          .join('\n  ')
+    }
+
+    dts += '\n}\n'
   }
 
   await unlinkAsync(source)

crates/backend/src/typegen.rs

@@ -35,6 +35,7 @@ pub static TYPE_REGEXES: Lazy<HashMap<&'static str, Regex>> = Lazy::new(|| {
     ("Vec", Regex::new(r"^Vec < (.*) >$").unwrap()),
     ("Option", Regex::new(r"^Option < (.*) >").unwrap()),
     ("Result", Regex::new(r"^Result < (.*) >").unwrap()),
+    ("HashMap", Regex::new(r"HashMap < (.*), (.*) >").unwrap()),
   ]);
 
   map
@@ -88,12 +89,24 @@ pub fn str_to_ts_type(ty: &str, omit_top_level_result: bool) -> String {
     s if s.starts_with("Result") && TYPE_REGEXES["Result"].is_match(s) => {
       let captures = TYPE_REGEXES["Result"].captures(s).unwrap();
       let inner = captures.get(1).unwrap().as_str();
+
       if omit_top_level_result {
         str_to_ts_type(inner, false)
       } else {
         format!("Error | {}", str_to_ts_type(inner, false))
       }
     }
+    s if TYPE_REGEXES["HashMap"].is_match(s) => {
+      let captures = TYPE_REGEXES["HashMap"].captures(s).unwrap();
+      let key = captures.get(1).unwrap().as_str();
+      let val = captures.get(2).unwrap().as_str();
+
+      format!(
+        "Record<{}, {}>",
+        str_to_ts_type(key, false),
+        str_to_ts_type(val, false)
+      )
+    }
     s => s.to_owned(),
   }
 }

crates/macro/src/parser/mod.rs

@@ -685,9 +685,10 @@ impl ConvertToAST for syn::ItemStruct {
 
       let (js_name, name) = match &field.ident {
         Some(ident) => (
-          field_opts
-            .js_name()
-            .map_or_else(|| ident.to_string(), |(js_name, _)| js_name.to_owned()),
+          field_opts.js_name().map_or_else(
+            || ident.to_string().to_case(Case::Camel),
+            |(js_name, _)| js_name.to_owned(),
+          ),
           syn::Member::Named(ident.clone()),
         ),
         None => {

crates/napi/src/bindgen_runtime/js_values.rs

@@ -4,6 +4,7 @@ use std::ptr;
 mod array;
 mod boolean;
 mod buffer;
+mod map;
 mod nil;
 mod number;
 mod object;

crates/napi/src/bindgen_runtime/js_values/map.rs

@@ -0,0 +1,44 @@
+use std::collections::HashMap;
+use std::hash::Hash;
+
+use crate::bindgen_prelude::{Env, Result, ToNapiValue, *};
+
+impl<K, V> TypeName for HashMap<K, V> {
+  fn type_name() -> &'static str {
+    "HashMap"
+  }
+}
+
+impl<K, V> ToNapiValue for HashMap<K, V>
+where
+  K: AsRef<str>,
+  V: ToNapiValue,
+{
+  unsafe fn to_napi_value(raw_env: sys::napi_env, val: Self) -> Result<sys::napi_value> {
+    let env = Env::from(raw_env);
+    let mut obj = env.create_object()?;
+    for (k, v) in val.into_iter() {
+      obj.set(k.as_ref(), v)?;
+    }
+
+    Object::to_napi_value(raw_env, obj)
+  }
+}
+
+impl<K, V> FromNapiValue for HashMap<K, V>
+where
+  K: From<String> + Eq + Hash,
+  V: FromNapiValue,
+{
+  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
+    let obj = Object::from_napi_value(env, napi_val)?;
+    let mut map = HashMap::new();
+    for key in Object::keys(&obj)?.into_iter() {
+      if let Some(val) = obj.get(&key)? {
+        map.insert(K::from(key), val);
+      }
+    }
+
+    Ok(map)
+  }
+}

crates/napi/src/bindgen_runtime/js_values/object.rs

@@ -19,8 +19,8 @@ impl Object {
     Ok(Object { env, inner: ptr })
   }
 
-  pub fn get<T: FromNapiValue>(&self, field: String) -> Result<Option<T>> {
-    let c_field = CString::new(field)?;
+  pub fn get<K: AsRef<str>, V: FromNapiValue>(&self, field: K) -> Result<Option<V>> {
+    let c_field = CString::new(field.as_ref())?;
 
     unsafe {
       let mut ret = ptr::null_mut();
@@ -36,16 +36,16 @@ impl Object {
       Ok(if ty == ValueType::Undefined {
         None
       } else {
-        Some(T::from_napi_value(self.env, ret)?)
+        Some(V::from_napi_value(self.env, ret)?)
       })
     }
   }
 
-  pub fn set<T: ToNapiValue>(&mut self, field: String, val: T) -> Result<()> {
-    let c_field = CString::new(field)?;
+  pub fn set<K: AsRef<str>, V: ToNapiValue>(&mut self, field: K, val: V) -> Result<()> {
+    let c_field = CString::new(field.as_ref())?;
 
     unsafe {
-      let napi_val = T::to_napi_value(self.env, val)?;
+      let napi_val = V::to_napi_value(self.env, val)?;
 
       check_status!(
         sys::napi_set_named_property(self.env, self.inner, c_field.as_ptr(), napi_val),

examples/napi/Cargo.toml

@@ -13,7 +13,10 @@ napi3 = ["napi/napi3"]
 
 [dependencies]
 napi-derive = { path = "../../crates/macro", features = ["type-def"] }
-napi = { path = "../../crates/napi", features = ["latin1"] }
+napi = { path = "../../crates/napi", features = ["latin1", "serde-json"] }
+serde = "1"
+serde_derive = "1"
+serde_json = "1"
 
 [build-dependencies]
 napi-build = { path = "../../crates/build" }

examples/napi/__test__/typegen.spec.ts.md

@@ -13,6 +13,7 @@ Generated by [AVA](https://avajs.dev).
     export function sumNums(nums: Array<number>): number␊
     export function getCwd(callback: (arg0: string) => void): void␊
     export function readFile(callback: (arg0: Error | undefined, arg1: string | null) => void): void␊
+    export function readPackageJson(): PackageJson␊
     export enum Kind { Dog = 0, Cat = 1, Duck = 2 }␊
     export enum CustomNumEnum { One = 1, Two = 2, Three = 3, Four = 4, Six = 6, Eight = 8, Nine = 9, Ten = 10 }␊
     export function enumToI32(e: CustomNumEnum): number␊
@@ -33,4 +34,11 @@ Generated by [AVA](https://avajs.dev).
       set name(name: string)␊
       whoami(): string␊
     }␊
+    export class PackageJson {␊
+      name: string␊
+      version: string␊
+      dependencies: Record<string, string> | null␊
+      devDependencies: Record<string, string> | null␊
+      constructor(name: string, version: string, dependencies: Record<string, string> | null, devDependencies: Record<string, string> | null)␊
+    }␊
     `

examples/napi/__test__/values.spec.ts

@@ -20,6 +20,7 @@ import {
   mapOption,
   readFile,
   throwError,
+  readPackageJson,
 } from '../'
 
 test('number', (t) => {
@@ -67,6 +68,12 @@ test('class', (t) => {
 
   dog.name = '可乐'
   t.is(dog.name, '可乐')
+
+  const packageJson = readPackageJson()
+  t.is(packageJson.name, 'napi-rs')
+  t.is(packageJson.version, '0.0.0')
+  t.is(packageJson.dependencies, null)
+  t.snapshot(Object.keys(packageJson.devDependencies!).sort())
 })
 
 test('callback', (t) => {

examples/napi/__test__/values.spec.ts.md

@@ -0,0 +1,38 @@
+# Snapshot report for `examples/napi/__test__/values.spec.ts`
+
+The actual snapshot is saved in `values.spec.ts.snap`.
+
+Generated by [AVA](https://avajs.dev).
+
+## class
+
+> Snapshot 1
+
+    [
+      '@types/debug',
+      '@types/lodash-es',
+      '@types/node',
+      '@types/sinon',
+      '@typescript-eslint/eslint-plugin',
+      '@typescript-eslint/parser',
+      'ava',
+      'benny',
+      'c8',
+      'cross-env',
+      'esbuild',
+      'eslint',
+      'eslint-config-prettier',
+      'eslint-plugin-import',
+      'eslint-plugin-prettier',
+      'husky',
+      'lerna',
+      'lint-staged',
+      'npm-run-all',
+      'prettier',
+      'shx',
+      'sinon',
+      'source-map-support',
+      'ts-node',
+      'tslib',
+      'typescript',
+    ]

examples/napi/index.d.ts

@@ -3,6 +3,7 @@ export function getNums(): Array<number>
 export function sumNums(nums: Array<number>): number
 export function getCwd(callback: (arg0: string) => void): void
 export function readFile(callback: (arg0: Error | undefined, arg1: string | null) => void): void
+export function readPackageJson(): PackageJson
 export enum Kind { Dog = 0, Cat = 1, Duck = 2 }
 export enum CustomNumEnum { One = 1, Two = 2, Three = 3, Four = 4, Six = 6, Eight = 8, Nine = 9, Ten = 10 }
 export function enumToI32(e: CustomNumEnum): number
@@ -23,3 +24,10 @@ export class Animal {
   set name(name: string)
   whoami(): string
 }
+export class PackageJson {
+  name: string
+  version: string
+  dependencies: Record<string, string> | null
+  devDependencies: Record<string, string> | null
+  constructor(name: string, version: string, dependencies: Record<string, string> | null, devDependencies: Record<string, string> | null)
+}

examples/napi/src/class.rs

@@ -1,3 +1,5 @@
+use std::{collections::HashMap, fs};
+
 use napi::bindgen_prelude::*;
 
 use crate::r#enum::Kind;
@@ -40,3 +42,20 @@ impl Animal {
     }
   }
 }
+
+#[napi(constructor)]
+#[derive(Serialize, Deserialize, Debug)]
+struct PackageJson {
+  pub name: String,
+  pub version: String,
+  pub dependencies: Option<HashMap<String, String>>,
+  #[serde(rename = "devDependencies")]
+  pub dev_dependencies: Option<HashMap<String, String>>,
+}
+
+#[napi]
+fn read_package_json() -> Result<PackageJson> {
+  let raw = fs::read_to_string("package.json")?;
+  let p: PackageJson = serde_json::from_str(&raw)?;
+  Ok(p)
+}

examples/napi/src/lib.rs

@@ -1,5 +1,7 @@
 #[macro_use]
 extern crate napi_derive;
+#[macro_use]
+extern crate serde_derive;
 
 mod array;
 mod callback;

examples/napi/src/object.rs

@@ -8,7 +8,7 @@ fn list_obj_keys(obj: Object) -> Vec<String> {
 #[napi]
 fn create_obj(env: Env) -> Object {
   let mut obj = env.create_object().unwrap();
-  obj.set("test".to_owned(), 1).unwrap();
+  obj.set("test", 1).unwrap();
 
   obj
 }