From 5723985f6a38041ab0c6ac6ca21f3b5a21a42b92 Mon Sep 17 00:00:00 2001
From: Rob Watson <rob@netflux.io>
Date: Thu, 17 Sep 2020 15:34:38 +0200
Subject: [PATCH] WIP: experiment with passing data between Rust wasm modules

---
 frontend/core/Cargo.toml                          |  1 +
 .../core/src/components/waveform/container.rs     | 15 ++++++++++++---
 frontend/core/src/lib.rs                          |  7 -------
 frontend/core/static/player.js                    |  4 ++++
 frontend/player/Cargo.toml                        |  6 ++++++
 frontend/player/src/lib.rs                        | 15 +++++++++++++++
 6 files changed, 38 insertions(+), 10 deletions(-)

diff --git a/frontend/core/Cargo.toml b/frontend/core/Cargo.toml
index 17845e9..25fae77 100644
--- a/frontend/core/Cargo.toml
+++ b/frontend/core/Cargo.toml
@@ -28,5 +28,6 @@ features = [
   "HtmlCanvasElement",
   "CanvasRenderingContext2d",
   "Window",
+  "File",
 ]
 
diff --git a/frontend/core/src/components/waveform/container.rs b/frontend/core/src/components/waveform/container.rs
index 361166a..cd47be8 100644
--- a/frontend/core/src/components/waveform/container.rs
+++ b/frontend/core/src/components/waveform/container.rs
@@ -1,10 +1,18 @@
 use super::canvas::Canvas;
 use crate::agents::audio_agent::{self, AudioAgent};
 use crate::components::Player;
-use web_sys::HtmlInputElement;
+use web_sys::{File, HtmlInputElement};
 use yew::agent::Dispatcher;
 use yew::prelude::*;
 use yew::services::ConsoleService;
+use wasm_bindgen::prelude::*;
+use weblog::*;
+
+#[wasm_bindgen(module = "/static/player.js")]
+extern "C" {
+    fn get_val() -> i32;
+    fn load_file(file: &str) -> i32;
+}
 
 pub struct Container {
     link: ComponentLink<Self>,
@@ -88,8 +96,9 @@ impl Container {
         let file_list = file_input.files().ok_or("could not get file list")?;
         let file = file_list.get(0).ok_or("could not get file")?;
 
-        self.audio_agent
-            .send(audio_agent::Request::LoadSamplesFromFile(file));
+        load_file("oh!");
+
+        console_log!("Done.");
 
         Ok(())
     }
diff --git a/frontend/core/src/lib.rs b/frontend/core/src/lib.rs
index 67b9d01..a0ab786 100644
--- a/frontend/core/src/lib.rs
+++ b/frontend/core/src/lib.rs
@@ -12,17 +12,10 @@ mod agents;
 mod components;
 mod utils;
 
-#[wasm_bindgen(module = "/static/player.js")]
-extern "C" {
-    fn get_val() -> i32;
-}
-
 #[wasm_bindgen(start)]
 pub fn run_app() {
     #[cfg(debug_assertions)]
     panic::set_hook(Box::new(console_error_panic_hook::hook));
 
-    console_log!("Get value from player module:", get_val());
-
     App::<components::App>::new().mount_to_body();
 }
diff --git a/frontend/core/static/player.js b/frontend/core/static/player.js
index b103b92..5ce0463 100644
--- a/frontend/core/static/player.js
+++ b/frontend/core/static/player.js
@@ -27,4 +27,8 @@ export function get_val() {
   return wasmModule.get_val();
 }
 
+export function load_file(f) {
+  return wasmModule.load_file(f);
+}
+
 init();
diff --git a/frontend/player/Cargo.toml b/frontend/player/Cargo.toml
index 0e06423..e6c9c75 100644
--- a/frontend/player/Cargo.toml
+++ b/frontend/player/Cargo.toml
@@ -10,3 +10,9 @@ crate-type = ["cdylib"]
 
 [dependencies]
 wasm-bindgen = { version = "0.2" }
+lazy_static = "1.4.0"
+weblog = "0.2"
+
+[dependencies.web-sys]
+version = "0.3.44"
+features = ["File"]
diff --git a/frontend/player/src/lib.rs b/frontend/player/src/lib.rs
index d11b7fb..5f65ed4 100644
--- a/frontend/player/src/lib.rs
+++ b/frontend/player/src/lib.rs
@@ -1,6 +1,21 @@
+#[macro_use]
+extern crate lazy_static;
+
 use wasm_bindgen::prelude::*;
+use web_sys::File;
+use weblog::*;
+
+lazy_static! {
+    static ref BUFFER: Vec<f32> = vec![];
+}
 
 #[wasm_bindgen]
 pub fn get_val() -> i32 {
     123
 }
+
+#[wasm_bindgen]
+pub fn load_file(file_element_id: &str) -> i32 {
+    console_log!("Got file:", file_element_id);
+    0
+}