initial import of main veilid core

veilid-core/src/intf/wasm/utils/mod.rs

@@ -0,0 +1,91 @@
+#![cfg(target_arch = "wasm32")]
+
+pub mod channel;
+
+use crate::xx::*;
+use core::sync::atomic::{AtomicI8, Ordering};
+use js_sys::{global, Reflect};
+
+cfg_if! {
+    if #[cfg(feature = "wee_alloc")] {
+        // When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
+        // allocator.
+        extern crate wee_alloc;
+        #[global_allocator]
+        static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
+    }
+}
+
+#[wasm_bindgen]
+extern "C" {
+    // Use `js_namespace` here to bind `console.log(..)` instead of just
+    // `log(..)`
+    #[wasm_bindgen(js_namespace = console, js_name = log)]
+    pub fn console_log(s: &str);
+
+    #[wasm_bindgen]
+    pub fn alert(s: &str);
+}
+
+pub fn is_nodejs() -> bool {
+    static CACHE: AtomicI8 = AtomicI8::new(-1);
+    let cache = CACHE.load(Ordering::Relaxed);
+    if cache != -1 {
+        return cache != 0;
+    }
+
+    let res = js_sys::eval("process.release.name === 'node'")
+        .map(|res| res.is_truthy())
+        .unwrap_or_default();
+
+    CACHE.store(res as i8, Ordering::Relaxed);
+    res
+}
+
+pub fn is_browser() -> bool {
+    static CACHE: AtomicI8 = AtomicI8::new(-1);
+    let cache = CACHE.load(Ordering::Relaxed);
+    if cache != -1 {
+        return cache != 0;
+    }
+
+    let res = Reflect::has(&global().as_ref(), &"window".into()).unwrap_or_default();
+
+    CACHE.store(res as i8, Ordering::Relaxed);
+
+    res
+}
+
+pub fn is_browser_https() -> bool {
+    static CACHE: AtomicI8 = AtomicI8::new(-1);
+    let cache = CACHE.load(Ordering::Relaxed);
+    if cache != -1 {
+        return cache != 0;
+    }
+
+    let res = js_sys::eval("window.location.protocol === 'https'")
+        .map(|res| res.is_truthy())
+        .unwrap_or_default();
+
+    CACHE.store(res as i8, Ordering::Relaxed);
+
+    res
+}
+
+pub fn node_require(module: &str) -> JsValue {
+    if !is_nodejs() {
+        return JsValue::UNDEFINED;
+    }
+
+    let mut home = env!("CARGO_MANIFEST_DIR");
+    if home.len() == 0 {
+        home = ".";
+    }
+
+    match js_sys::eval(format!("require(\"{}/{}\")", home, module).as_str()) {
+        Ok(v) => v,
+        Err(e) => {
+            panic!("node_require failed: {:?}", e);
+        }
+    }
+}