feat: added storing if the preview popup was already shown this session

Cargo.lock

@@ -131,6 +131,7 @@ dependencies = [
  "futures-channel",
  "gloo 0.10.0",
  "gloo-net 0.4.0",
+ "gloo-storage 0.3.0",
  "serde",
  "serde_json",
  "wasm-bindgen",

Cargo.toml

@@ -22,3 +22,4 @@ wasm-bindgen-futures = "0.4"
 web-sys = { version = "0.3.64", features = ["HtmlInputElement", "HtmlDocument"] }
 gloo = "0.10.0"
 gloo-net = "0.4.0"
+gloo-storage = "0.3.0"

src/main.rs

@@ -2,10 +2,10 @@ mod backend;
 mod content;
 mod topbar;
 
-use anyhow::Result;
 use backend::Session;
 use content::{about::About, error, home::Home};
 use gloo::dialogs::alert;
+use gloo_storage::{SessionStorage, Storage};
 use std::ops::Deref;
 use topbar::TopBar;
 use yew::prelude::*;
@@ -70,8 +70,22 @@ fn App() -> Html {
 }
 
 fn main() {
-    if option_env!("NC_BETA_BUILD").is_some() {
-        alert("This is a beta preview!\nThe UI and the backend are subjects to change. Data persistence can't be guaranteed.");
-    }
+    preview_alert();
     yew::Renderer::<App>::new().render();
 }
+
+fn preview_alert() {
+    if option_env!("NC_BETA_BUILD").is_none() {
+        return;
+    }
+
+    if let Ok(value) = SessionStorage::get::<bool>("nc-preview-alert-shown") {
+        if value {
+            return;
+        }
+    }
+
+    SessionStorage::set("nc-preview-alert-shown", true).expect("Failed to set session storage!");
+
+    alert("This is a beta preview!\nThe UI and the backend are subjects to change. Data persistence can't be guaranteed.");
+}