From 09d93fac79c71b295784679f2f150783fcfcee8e Mon Sep 17 00:00:00 2001
From: ElnuDev <elnu@elnu.com>
Date: Sun, 20 Aug 2023 18:33:36 -0700
Subject: [PATCH] Basic KLE layout loader

---
 Cargo.lock              |   2 +
 dyesub-tool/Cargo.toml  |   2 +
 dyesub-tool/src/main.rs | 141 ++++++++++++++++++++++++++++++++++++++--
 flake.nix               |   2 +-
 4 files changed, 139 insertions(+), 8 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index ab10e89..594941c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -393,6 +393,8 @@ dependencies = [
  "strum",
  "strum_macros",
  "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
 ]
 
 [[package]]
diff --git a/dyesub-tool/Cargo.toml b/dyesub-tool/Cargo.toml
index eea0e69..d3f1121 100644
--- a/dyesub-tool/Cargo.toml
+++ b/dyesub-tool/Cargo.toml
@@ -14,3 +14,5 @@ serde_json = "1.0.105"
 strum = "0.25.0"
 strum_macros = "0.25.2"
 wasm-bindgen = "0.2.87"
+wasm-bindgen-futures = "0.4.37"
+web-sys = { version = "0.3.64", features = ["FileList", "Blob"] }
diff --git a/dyesub-tool/src/main.rs b/dyesub-tool/src/main.rs
index 779ad7b..890fc29 100644
--- a/dyesub-tool/src/main.rs
+++ b/dyesub-tool/src/main.rs
@@ -1,18 +1,145 @@
+#![feature(async_closure)]
+
 mod render;
 pub mod svg;
 
-use leptos::*;
-use wasm_bindgen::JsCast;
+use leptos::{*, ev::SubmitEvent, html::Input};
+use wasm_bindgen::{JsCast, JsValue};
+use web_sys::File;
+use strum_macros::IntoStaticStr;
+use derive_more::From;
+
+#[derive(Clone)]
+struct ResultMessageData {
+    title: String,
+    message: View,
+    colorway: Colorway,
+}
+
+#[derive(Default, Clone, Copy, IntoStaticStr)]
+enum Colorway {
+    #[default]
+    #[strum(serialize = "plain")]
+    Plain,
+    #[strum(serialize = "info")]
+    Info,
+    #[strum(serialize = "ok")]
+    Ok,
+    #[strum(serialize = "warn")]
+    Warn,
+    #[strum(serialize = "bad")]
+    Bad,
+}
+
+#[component]
+fn ResultMessage(cx: Scope, message: ReadSignal<Option<ResultMessageData>>) -> impl IntoView {
+    view! { cx,
+        <Show when=move || message().is_some() fallback=move |_| {}>
+            <div class=move || {
+                let colorway_str: &str = message().unwrap().colorway.into();
+                colorway_str.to_owned() + " box"
+            }>
+                <h3>{move || message().unwrap().title}</h3>
+                <p>{move || message().unwrap().message}</p>
+            </div>
+        </Show>
+    }
+}
+
+#[derive(From, IntoStaticStr)]
+enum ReadKleError {
+    #[strum(serialize = "No file chosen")]
+    NoFile,
+    #[strum(serialize = "Failed to open file")]
+    TextAwait(JsValue),
+    #[strum(serialize = "Failed to parse file to string")]
+    ParseToString,
+    #[strum(serialize = "Failed to parse KLE JSON")]
+    Serde(serde_json::Error)
+}
+
+impl ToString for ReadKleError {
+    fn to_string(&self) -> String {
+        if let Self::TextAwait(error) = self {
+            if let Some(error) = error.as_string() {
+                return error;
+            }
+        } else if let Self::Serde(error) = self {
+            return error.to_string();
+        }
+        "".to_string()
+    }
+}
+
+async fn read_kle_from_file(file: &ReadSignal<Option<File>>) -> Result<kle_serial::Keyboard, ReadKleError> {
+    let file = match file() {
+        Some(file) => file,
+        None => return Err(ReadKleError::NoFile),
+    };
+    let file_contents = match wasm_bindgen_futures::JsFuture::from(file.text()).await?.as_string() {
+        Some(contents) => contents,
+        None => return Err(ReadKleError::ParseToString),
+    };
+    let keyboard = serde_json::from_str(&file_contents)?;
+    Ok(keyboard)
+}
+
+#[component]
+fn KeyboardFromFile(cx: Scope, set_keyboard: WriteSignal<Option<kle_serial::Keyboard>>) -> impl IntoView {
+    let file_input = create_node_ref::<Input>(cx);
+    let (file, set_file) = create_signal(cx, Option::<File>::None);
+    let (result_message, set_result_message) = create_signal(cx, Option::<ResultMessageData>::None);
+    let on_submit = move |e: SubmitEvent| {
+        e.prevent_default();
+        spawn_local(async move {
+            match read_kle_from_file(&file).await {
+                Ok(keyboard) => {
+                    set_result_message(Some(ResultMessageData {
+                        title: "Success".to_owned(),
+                        message: view! { cx,
+                            "Loaded KLE layout "<b>{&keyboard.metadata.name}</b>" successfully!"
+                        }.into_view(cx),
+                        colorway: Colorway::Ok,
+                    }));
+                    set_keyboard(Some(keyboard));
+                },
+                Err(err) => set_result_message(Some(ResultMessageData {
+                    message: view! { cx,
+                        {
+                            err.to_string()
+                        }
+                    }.into_view(cx),
+                    title: <ReadKleError as Into<&str>>::into(err).to_string(),
+                    colorway: Colorway::Bad,
+                }))
+            }
+        });
+    };
+    view! { cx,
+        <h3>"Load KLE JSON from file"</h3>
+        <ResultMessage message=result_message />
+        <form class="f-row align-items:center" on:submit=on_submit>
+            <input
+                type="file"
+                accept="application/json"
+                node_ref=file_input
+                on:change=move |_| {
+                    set_file(file_input().unwrap().files().map(|files| files.get(0)).flatten());
+                }
+            />
+            <Show when=move || file().is_some() fallback=move |_| {}>
+                <input type="submit" value="Load" />
+            </Show>
+        </form>
+    }
+}
 
 #[component]
 fn App(cx: Scope) -> impl IntoView {
-    let (count, set_count) = create_signal(cx, 0);
+    let (keyboard, set_keyboard) = create_signal(cx, None);
 
     view! { cx,
-        <button on:click=move |_| set_count(count.get() + 1)>
-            "Click me: "
-            {move || count.get()}
-        </button>
+        <KeyboardFromFile set_keyboard />
     }
 }
 
diff --git a/flake.nix b/flake.nix
index 92bac71..eddfd97 100644
--- a/flake.nix
+++ b/flake.nix
@@ -55,7 +55,7 @@ Updating `cargoHash`:
           version = "0.1.0";
           buildAndTestSubdir = "dyesub-tool";
           buildInputs = with pkgs; [ trunk ];
-          cargoHash = "sha256-Bxc2koMKq8cGFiJtA0qL1geWQls1k2PgtByg7LZwdlc=";
+          cargoHash = "sha256-UcFVv4lqmZW4Nwjps2u2cNU323hk8ezifeGU9dEZ7Ao=";
           meta = meta // {
             description = "A tool for generating dye sublimation transfer sheet SVGs for Japanese thumb shift 拇指シフト keycaps.";
           };