add serde events

crates/seed-keeper-wit-ui/Cargo.toml

@@ -3,14 +3,20 @@ name = "seed-keeper-wit-ui"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lib]
+crate-type = ["cdylib"]
 
 [dependencies]
 cargo-component-bindings = { workspace = true }
 wurbo = "0.1.2"
 
-[lib]
-crate-type = ["cdylib"]
+# optional dependencies
+serde = { version = "1.0", optional = true, features = ["derive"] }
+serde_json = { version = "1.0.107", optional = true }
+
+[features]
+default = ["serde"]
+serde = ["dep:serde", "dep:serde_json"]
 
 [package.metadata.component]
 package = "seed-keeper:wit-ui"

crates/seed-keeper-wit-ui/src/events.rs

@@ -0,0 +1,26 @@
+//! Events which can be emitted from this component.
+//! Match on the received json string to listen for these events.
+
+/// Events which can be emitted from this component.
+/// If the `serde` feature is enabled, these events will be serialized
+/// with an adjacent `tag` and `val` to match the style that wit-component uses,
+/// so that when this event reaches the Context Router in `wurbo`, it can be routed accordingly.
+/// See <https://serde.rs/enum-representations.html#adjacently-tagged> for more information.
+///
+/// This enum is non-exhaustive, so that new events can be added in the future without breaking
+#[derive(Debug, Clone)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+#[cfg_attr(feature = "serde", serde(tag = "tag", content = "val"))]
+#[non_exhaustive]
+pub enum Contexts {
+    Events(Event),
+}
+
+#[derive(Debug, Clone)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+#[cfg_attr(feature = "serde", serde(tag = "tag", content = "val"))]
+#[non_exhaustive]
+pub enum Event {
+    /// The encrypted seed
+    Encrypted(Vec<u8>),
+}

crates/seed-keeper-wit-ui/src/lib.rs

@@ -2,6 +2,8 @@
 //!
 cargo_component_bindings::generate!();
 
+/// Event types which can can emitted from this UI
+pub mod events;
 mod input;
 mod output;
 mod page;