feat: Add basic support for Date

.gitignore

@@ -2,3 +2,4 @@
 /Cargo.lock
 wasi-sdk
 *.wasm
+.venv

Cargo.toml

@@ -6,7 +6,7 @@ members = [
 ]
 
 [workspace.package]
-version = "1.0.0-rc6"
+version = "1.0.0-rc7"
 edition = "2021"
 authors = ["The Extism Authors"]
 license = "BSD-Clause-3"

crates/cli/Cargo.toml

@@ -12,13 +12,13 @@ path = "src/main.rs"
 
 [dependencies]
 anyhow = { workspace = true }
-wizer = "4.0.0"
+wizer = "4"
 structopt = "0.3"
 swc_atoms = "0.6.5"
 swc_common = "0.33.10"
 swc_ecma_ast = "0.112"
 swc_ecma_parser = "0.143"
 wagen = "0.1"
-log = "0.4.20"
-tempfile = "3.8.1"
+log = "0.4"
+tempfile = "3"
 env_logger = "0.11"

crates/core/Cargo.toml

@@ -8,10 +8,11 @@ license.workspace = true
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-extism-pdk = "1.0.0"
+extism-pdk = "1"
 once_cell = "1.16"
 anyhow = { workspace = true }
 quickjs-wasm-rs = "3"
+chrono = { version = "0.4", default_features = false, features = ["clock"]}
 
 [lib]
 crate_type = ["cdylib"]

crates/core/src/globals.rs

@@ -1,6 +1,7 @@
 use std::{borrow::Cow, collections::HashMap, str::from_utf8};
 
 use anyhow::{anyhow, bail, Context};
+use chrono::{SecondsFormat, Utc};
 use extism_pdk::extism::load_input;
 use extism_pdk::*;
 use quickjs_wasm_rs::{JSContextRef, JSError, JSValue, JSValueRef};
@@ -15,6 +16,7 @@ pub fn inject_globals(context: &JSContextRef) -> anyhow::Result<()> {
     let cfg = build_config_object(context)?;
     let decoder = build_decoder(context)?;
     let encoder = build_encoder(context)?;
+    let clock = build_clock(context)?;
     let mem = build_memory(context)?;
     let host = build_host_object(context)?;
 
@@ -28,6 +30,7 @@ pub fn inject_globals(context: &JSContextRef) -> anyhow::Result<()> {
     global.set_property("Memory", mem)?;
     global.set_property("__decodeUtf8BufferToString", decoder)?;
     global.set_property("__encodeStringToUtf8Buffer", encoder)?;
+    global.set_property("__getTime", clock)?;
 
     add_host_functions(context)?;
 
@@ -483,6 +486,10 @@ fn build_memory(context: &JSContextRef) -> anyhow::Result<JSValueRef> {
     Ok(mem_obj)
 }
 
+fn build_clock(context: &JSContextRef) -> anyhow::Result<JSValueRef> {
+    context.wrap_callback(get_time())
+}
+
 fn build_decoder(context: &JSContextRef) -> anyhow::Result<JSValueRef> {
     context.wrap_callback(decode_utf8_buffer_to_js_string())
 }
@@ -491,6 +498,15 @@ fn build_encoder(context: &JSContextRef) -> anyhow::Result<JSValueRef> {
     context.wrap_callback(encode_js_string_to_utf8_buffer())
 }
 
+fn get_time() -> impl FnMut(&JSContextRef, JSValueRef, &[JSValueRef]) -> anyhow::Result<JSValue> {
+    move |_ctx: &JSContextRef, _this: JSValueRef, _args: &[JSValueRef]| {
+        let now = Utc::now();
+        // This format is compatible with JavaScript's Date constructor
+        let formatted = now.to_rfc3339_opts(SecondsFormat::Millis, true);
+        Ok(formatted.into())
+    }
+}
+
 fn decode_utf8_buffer_to_js_string(
 ) -> impl FnMut(&JSContextRef, JSValueRef, &[JSValueRef]) -> anyhow::Result<JSValue> {
     move |_ctx: &JSContextRef, _this: JSValueRef, args: &[JSValueRef]| {

crates/core/src/prelude/src/index.js

@@ -7,6 +7,19 @@ globalThis.URLPattern = URLPattern;
 
 const __decodeUtf8BufferToString = globalThis.__decodeUtf8BufferToString;
 const __encodeStringToUtf8Buffer = globalThis.__encodeStringToUtf8Buffer;
+const __getTime = globalThis.__getTime
+
+class __ExtismDate extends Date {
+  constructor(arg) {
+    if (arg) {
+      super(arg)
+    } else {
+      super(__getTime())
+    }
+  }
+}
+
+globalThis.Date = __ExtismDate
 
 class TextDecoder {
   constructor(label = "utf-8", options = {}) {
@@ -85,7 +98,7 @@ class MemoryHandle {
     const arr = new BigUint64Array(bytes);
     return arr[0];
   }
-  
+
   readFloat32() {
     const bytes = this.readBytes();
     const arr = new Float32Array(bytes);