Add basic api

Cargo.toml

@@ -8,6 +8,7 @@ members = [
     ".",
     "./words",
     "./this_algorithm-wasm/",
+    "./web",
 ]
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

web/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "web"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rocket = {version="0.5.0-rc.2", features=["json"]}
+tokio = {version="1"}
+this_algorithm={path=".."}
+serde = {version="1", features=["derive"]}

web/src/main.rs

@@ -0,0 +1,47 @@
+use std::str::FromStr;
+
+use rocket::{get, routes, serde::json::Json};
+use serde::{Deserialize, Serialize};
+use this_algorithm::Address;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let _r = rocket::build()
+        // Add the API
+        .mount("/api/v1", routes![get_address, get_coords])
+        // Add the webui frontend
+        // TODO: ./mount("/", routes![webui])
+        .launch()
+        .await?;
+
+    Ok(())
+}
+
+#[get("/address?<lat>&<lon>")]
+async fn get_address(lat: f64, lon: f64) -> Result<String, String> {
+    Address::from_lat_lon(lat, lon)
+        .map(|a| a.to_string())
+        .map_err(|e| e.to_string())
+}
+
+#[get("/coords?<address>")]
+async fn get_coords(address: String) -> Result<Json<Coords>, String> {
+    Address::from_str(&address)
+        .as_ref()
+        .map(Address::to_lat_lon)
+        .map(Coords::from)
+        .map(Json)
+        .map_err(|e| e.to_string())
+}
+
+#[derive(Serialize, Deserialize)]
+struct Coords {
+    lat: f64,
+    lon: f64,
+}
+
+impl From<(f64, f64)> for Coords {
+    fn from((lat, lon): (f64, f64)) -> Self {
+        Self { lat, lon }
+    }
+}