add rss feed with common actions

src/model/log.rs

@@ -0,0 +1,48 @@
+use rss::{ChannelBuilder, Item};
+use serde::{Deserialize, Serialize};
+use sqlx::{FromRow, SqlitePool};
+
+#[derive(FromRow, Debug, Serialize, Deserialize)]
+pub struct Log {
+    pub msg: String,
+    pub created_at: String,
+}
+
+impl Log {
+    pub async fn create(db: &SqlitePool, msg: String) -> bool {
+        sqlx::query!("INSERT INTO log(msg) VALUES (?)", msg,)
+            .execute(db)
+            .await
+            .is_ok()
+    }
+
+    async fn last(db: &SqlitePool) -> Vec<Log> {
+        sqlx::query_as!(
+            Log,
+            "
+SELECT msg, created_at
+FROM log 
+ORDER BY id DESC
+LIMIT 1000
+    "
+        )
+        .fetch_all(db)
+        .await
+        .unwrap()
+    }
+
+    pub async fn generate_feed(db: &SqlitePool) -> String {
+        let mut channel = ChannelBuilder::default()
+            .title("Ruder App Admin Feed")
+            .description("An RSS feed with activities from app.rudernlinz.at")
+            .build();
+        let mut items: Vec<Item> = vec![];
+        for log in Self::last(db).await {
+            let mut item = Item::default();
+            item.set_title(format!("({}) {}", log.created_at, log.msg));
+            items.append(&mut vec![item]);
+        }
+        channel.set_items(items);
+        channel.to_string()
+    }
+}

src/model/mod.rs

@@ -7,6 +7,7 @@ use self::{
     trip::{Trip, TripWithUser},
 };
 
+pub mod log;
 pub mod planned_event;
 pub mod trip;
 pub mod tripdetails;