Fix the admin server not creating config.json if not found

.gitignore

@@ -1,2 +1,3 @@
 /target
 .idea/
+config.json

src/bin/kawari-admin.rs

@@ -10,6 +10,14 @@ use axum::response::{Html, Redirect};
 use axum::routing::post;
 use kawari::config::Config;
 
+fn get_config() -> Config {
+    if let Ok(data) = std::fs::read_to_string("config.json") {
+        serde_json::from_str(&data).expect("Failed to parse")
+    } else {
+        Config::default()
+    }
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 struct GateStatus {
     status: i32,
@@ -18,14 +26,9 @@ struct GateStatus {
 async fn root() -> Html<String> {
     tracing::info!("Requesting gate status...");
 
-    // read config
-    if let Ok(data) = std::fs::read_to_string("config.json") {
-        let config: Config = serde_json::from_str(&data).expect("Failed to parse");
+    let config = get_config();
 
-        Html(format!("<p>Gate open:{}</p><form action='apply' method='post'><input type='checkbox' id='gate_open' name='gate_open' checked /><button type='submit'>Apply</button></form>", config.gate_open))
-    } else {
-        Html(format!("unknown error"))
-    }
+    Html(format!("<p>Gate open:{}</p><form action='apply' method='post'><input type='checkbox' id='gate_open' name='gate_open' checked /><button type='submit'>Apply</button></form>", config.gate_open))
 }
 
 #[derive(Deserialize, Debug)]
@@ -37,21 +40,20 @@ struct Input {
 async fn apply(Form(input): Form<Input>) -> Redirect {
     tracing::info!("Apply config changes...");
 
-    if let Ok(data) = std::fs::read_to_string("config.json") {
-        let mut config: Config = serde_json::from_str(&data).expect("Failed to parse");
-        if let Some(gate_open) = input.gate_open {
-            config.gate_open = gate_open == "on";
-        } else {
-            config.gate_open = false;
-        }
+    let mut config = get_config();
 
-        serde_json::to_writer(
-            &std::fs::File::create("config.json").unwrap(),
-            &config,
-        )
-        .expect("TODO: panic message");
+    if let Some(gate_open) = input.gate_open {
+        config.gate_open = gate_open == "on";
+    } else {
+        config.gate_open = false;
     }
 
+    serde_json::to_writer(
+        &std::fs::File::create("config.json").unwrap(),
+        &config,
+    )
+    .expect("TODO: panic message");
+
     Redirect::to("/")
 }
 

src/config.rs

@@ -3,4 +3,12 @@ use serde::{Deserialize, Serialize};
 #[derive(Serialize, Deserialize)]
 pub struct Config {
     pub gate_open: bool
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            gate_open: false,
+        }
+    }
 }