6 files changed, 216 insertions, 0 deletions
diff --git a/WebInterface/wasm/webhogg/src/app.rs b/WebInterface/wasm/webhogg/src/app.rs
new file mode 100644
index 0000000..7931418
--- /dev/null
+++ b/WebInterface/wasm/webhogg/src/app.rs
@@ -0,0 +1,22 @@
+use crate::webhogg_exception::WebhoggException;
+use crate::page::Page;
+use crate::canvas::Canvas;
+
+pub(crate) struct WebhoggApplication {
+    page: Page,
+    canvas: Canvas,
+}
+
+impl WebhoggApplication {
+    pub fn new() -> Result<Self, WebhoggException> {
+        let page = Page::obtain()?;
+        let canvas = Canvas::from_existing("canvas", &page)?;
+        Ok(Self {
+            page, canvas,
+        })
+    }
+
+    pub fn run(self) -> Result<(), WebhoggException> {
+        Ok(())
+    }
+}
diff --git a/WebInterface/wasm/webhogg/src/canvas.rs b/WebInterface/wasm/webhogg/src/canvas.rs
new file mode 100644
index 0000000..a0ef7d1
--- /dev/null
+++ b/WebInterface/wasm/webhogg/src/canvas.rs
@@ -0,0 +1,42 @@
+use web_sys::WebGl2RenderingContext as WebGl2;
+use wasm_bindgen::JsCast;
+use crate::webhogg_exception::WebhoggException;
+use crate::page::Page;
+
+pub struct Canvas {
+    ctx: WebGl2,
+}
+
+impl Canvas {
+    pub fn from_existing(id: &str, page: &Page) -> Result<Self, WebhoggException> {
+        let canvas_element = page.get_element(id)
+            .ok_or(WebhoggException::DomError(
+                    "could not obtain canvas element (id=canvas)"
+                    .to_string()))?;
+        let canvas_element = canvas_element
+            .dyn_into::<web_sys::HtmlCanvasElement>()
+            .map_err(|_| WebhoggException::DomError(
+                    "id=canvas is not a canvas element".to_string()))?;
+        debug!("successfully obtained canvas element");
+        let ctx = canvas_element.get_context("webgl2")
+            .map_err(|_| WebhoggException::WebGlContextError(
+                    "obtained invalid webgl2 context js value".to_string()))?
+            .ok_or(WebhoggException::WebGlContextError(
+                    "could not obtaine webgl2 context".to_string()))?
+            .dyn_into::<WebGl2>()
+            .map_err(|_| WebhoggException::WebGlContextError(
+                    "obtained invalid webgl2 context js object".to_string()))?;
+        debug!("successfully obtained webgl2 context");
+        Ok(Self {
+            ctx,
+        })
+    }
+
+    pub fn gl<'a>(&'a self) -> &'a WebGl2 {
+        &self.ctx
+    }
+
+    pub fn gl_mut<'a>(&'a mut self) -> &'a mut WebGl2 {
+        &mut self.ctx
+    }
+}
diff --git a/WebInterface/wasm/webhogg/src/client_logger.rs b/WebInterface/wasm/webhogg/src/client_logger.rs
new file mode 100644
index 0000000..f71918f
--- /dev/null
+++ b/WebInterface/wasm/webhogg/src/client_logger.rs
@@ -0,0 +1,46 @@
+use wasm_bindgen::prelude::*;
+
+#[wasm_bindgen]
+extern "C" {
+    #[wasm_bindgen(js_namespace=console, js_name=debug)]
+    fn __console_debug_colored2(f: &str, c1: &str, c2: &str);
+    #[wasm_bindgen(js_namespace=console, js_name=info)]
+    fn __console_info_colored2(f: &str, c1: &str, c2: &str);
+    #[wasm_bindgen(js_namespace=console, js_name=warn)]
+    fn __console_warn_colored2(f: &str, c1: &str, c2: &str);
+    #[wasm_bindgen(js_namespace=console, js_name=error)]
+    fn __console_error_colored2(f: &str, c1: &str, c2: &str);
+}
+
+fn log(rec: &log::Record) {
+    let log_fn = match rec.level() {
+        log::Level::Trace | log::Level::Debug => __console_debug_colored2,
+        log::Level::Info => __console_info_colored2,
+        log::Level::Warn => __console_warn_colored2,
+        log::Level::Error => __console_error_colored2,
+    };
+    log_fn(&format!("{}", rec.args()),
+                           &format!("color: {}", match rec.level() {
+        log::Level::Trace => "violet",
+        log::Level::Debug => "blue",
+        log::Level::Info => "green",
+        log::Level::Warn => "orange",
+        log::Level::Error => "red"
+    }), "");
+}
+
+pub fn init_logger() {
+    fern::Dispatch::new().format(|out, message, record|{
+        out.finish(format_args!(
+                "%c{}%c {} > {}",
+                record.level(),
+                record.target(),
+                message
+                )
+            )
+        })
+        .level(log::LevelFilter::Debug)
+        .chain(fern::Output::call(log))
+        .apply().unwrap();
+}
+
diff --git a/WebInterface/wasm/webhogg/src/lib.rs b/WebInterface/wasm/webhogg/src/lib.rs
new file mode 100644
index 0000000..4a79a24
--- /dev/null
+++ b/WebInterface/wasm/webhogg/src/lib.rs
@@ -0,0 +1,41 @@
+mod client_logger;
+mod webhogg_exception;
+mod page;
+mod canvas;
+mod app;
+
+use wasm_bindgen::prelude::*;
+use app::WebhoggApplication as App;
+use web_sys::Worker;
+
+#[macro_use]
+extern crate log;
+
+fn run_application() {
+    match App::new().and_then(|app| app.run()) {
+        Ok(_) => info!("program terminated successfully"),
+        Err(e) => error!("program terminated with failure > {}", e)
+    }
+}
+
+#[wasm_bindgen]
+pub fn game_logic_entry(worker: Worker) {
+    client_logger::init_logger();
+
+    info!("game logic initialisation");
+}
+
+#[wasm_bindgen]
+pub fn graphics_entry(worker: Worker) {
+    client_logger::init_logger();
+
+    info!("graphics initialisation");
+}
+
+pub fn entry2() {
+    client_logger::init_logger();
+
+    info!("begin running wasm application");
+
+    run_application()
+}
diff --git a/WebInterface/wasm/webhogg/src/page.rs b/WebInterface/wasm/webhogg/src/page.rs
new file mode 100644
index 0000000..cb9ee3f
--- /dev/null
+++ b/WebInterface/wasm/webhogg/src/page.rs
@@ -0,0 +1,26 @@
+use web_sys;
+
+use crate::webhogg_exception::WebhoggException;
+
+pub struct Page {
+    window: web_sys::Window,
+    document: web_sys::Document,
+}
+
+impl Page {
+    pub fn obtain() -> Result<Self, WebhoggException> {
+        let window = web_sys::window()
+            .ok_or(WebhoggException::DomError("could not obtain window".to_string()))?;
+        let document = window.document()
+            .ok_or(WebhoggException::DomError("could not obtain document".to_string()))?;
+        debug!("initialised page");
+        Ok(Self {
+            window,
+            document,
+        })
+    }
+
+    pub fn get_element(&self, id: &str) -> Option<web_sys::Element> {
+        self.document.get_element_by_id(id)
+    }
+}
diff --git a/WebInterface/wasm/webhogg/src/webhogg_exception.rs b/WebInterface/wasm/webhogg/src/webhogg_exception.rs
new file mode 100644
index 0000000..46eedd6
--- /dev/null
+++ b/WebInterface/wasm/webhogg/src/webhogg_exception.rs
@@ -0,0 +1,39 @@
+use std::error::Error;
+
+#[derive(Debug)]
+pub enum WebhoggException {
+    DomError(String),
+    WebGlContextError(String),
+}
+
+impl WebhoggException {
+    fn err_name(&self) -> &str {
+        match self {
+            WebhoggException::DomError(_) => "DomError",
+            WebhoggException::WebGlContextError(_) => "WebGlContextError",
+        }
+    }
+}
+
+impl Error for WebhoggException {
+    fn description(&self) -> &str {
+        match self {
+            WebhoggException::DomError(desc) => desc,
+            WebhoggException::WebGlContextError(desc) => desc,
+        }
+    }
+
+    fn cause(&self) -> Option<&dyn Error> {
+        self.source()
+    }
+
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        None
+    }
+}
+
+impl std::fmt::Display for WebhoggException {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(f, "WebhoggException::{} {}", self.err_name(), self.description())
+    }
+}