add: communities list page

TODO(ui): implement community creation, community viewing, community posting
TODO(ui): implement profile following, followers, and posts feed

crates/app/src/routes/pages/communities.rs

@@ -0,0 +1,37 @@
+use super::render_error;
+use crate::{State, assets::initial_context, get_lang, get_user_from_token};
+use axum::{
+    Extension,
+    response::{Html, IntoResponse},
+};
+use axum_extra::extract::CookieJar;
+use tetratto_core::model::Error;
+
+/// `/communities`
+pub async fn list_request(jar: CookieJar, Extension(data): Extension<State>) -> impl IntoResponse {
+    let data = data.read().await;
+    let user = match get_user_from_token!(jar, data.0) {
+        Some(ua) => ua,
+        None => {
+            return Err(Html(
+                render_error(Error::NotAllowed, &jar, &data, &None).await,
+            ));
+        }
+    };
+
+    let posts = match data.0.get_memberships_by_owner(user.id).await {
+        Ok(p) => p,
+        Err(e) => return Err(Html(render_error(e, &jar, &data, &Some(user)).await)),
+    };
+
+    let lang = get_lang!(jar, data.0);
+    let mut context = initial_context(&data.0.0, lang, &Some(user)).await;
+    context.insert("posts", &posts);
+
+    // return
+    Ok(Html(
+        data.1
+            .render("communities/list.html", &mut context)
+            .unwrap(),
+    ))
+}