home page with toplevel, latest release and daily random

1 files changed, 73 insertions, 6 deletions

diff --git a/server/src/routes/ui/home.rs b/server/src/routes/ui/home.rs
index c544336..d9d1100 100644
--- a/server/src/routes/ui/home.rs
+++ b/server/src/routes/ui/home.rs
@@ -3,28 +3,84 @@
     which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
     Copyright (C) 2023 metamuffin <metamuffin.org>
 */
-use super::{account::session::Session, layout::LayoutPage};
+use super::{account::session::Session, layout::LayoutPage, node::NodeCard};
 use crate::{
     database::Database,
     routes::ui::{error::MyResult, layout::DynLayoutPage},
 };
+use anyhow::Context;
+use chrono::{Datelike, Utc};
 use jellybase::CONF;
+use jellycommon::NodePublic;
 use rocket::{get, State};
 use tokio::fs::read_to_string;
 
 #[get("/")]
-pub fn r_home(_sess: Session, _db: &State<Database>) -> DynLayoutPage {
-    LayoutPage {
+pub fn r_home(sess: Session, db: &State<Database>) -> MyResult<DynLayoutPage> {
+    let mut items = db
+        .node
+        .iter()
+        .map(|e| e.context("listing"))
+        .collect::<anyhow::Result<Vec<_>>>()?
+        .into_iter()
+        .map(|(k, n)| (k, n.public))
+        .collect::<Vec<(String, NodePublic)>>();
+
+    let random = (0..16)
+        .flat_map(|i| Some(items[cheap_daily_random(i).checked_rem(items.len())?].clone()))
+        .collect::<Vec<_>>();
+
+    let toplevel = db
+        .node
+        .get(&"library".to_string())?
+        .context("root node missing")?
+        .public
+        .children
+        .into_iter()
+        .map(|n| {
+            Ok((
+                n.clone(),
+                db.node.get(&n)?.context("child does not exist")?.public,
+            ))
+        })
+        .collect::<anyhow::Result<Vec<_>>>()?
+        .into_iter()
+        .collect::<Vec<_>>();
+
+    items.sort_by_key(|(_, n)| {
+        n.release_date
+            .map(|d| d.naive_utc().timestamp())
+            .unwrap_or(0)
+    });
+
+    let latest = items
+        .iter()
+        .take(16)
+        .map(|k| k.to_owned())
+        .collect::<Vec<_>>();
+
+    Ok(LayoutPage {
         title: "Home".to_string(),
         content: markup::new! {
-            p { "Welcome to " @CONF.brand  }
+            p { "Welcome back " @sess.user.display_name  }
+            h2 { "Explore " @CONF.brand }
+            .homelist { ul {@for (id, node) in &toplevel {
+                li { @NodeCard { id, node } }
+            }}}
+            h2 { "Latest Releases" }
+            .homelist { ul {@for (id, node) in &latest {
+                li { @NodeCard { id, node } }
+            }}}
+            h2 { "Today's Picks" }
+            .homelist { ul {@for (id, node) in &random {
+                li { @NodeCard { id, node } }
+            }}}
             p.error { "TODO: continue watching" }
             p.error { "TODO: recently added" }
             p.error { "TODO: best rating" }
-            p.error { "TODO: random" }
         },
         ..Default::default()
-    }
+    })
 }
 
 #[get("/", rank = 2)]
@@ -38,3 +94,14 @@ pub async fn r_home_unpriv() -> MyResult<DynLayoutPage<'static>> {
         ..Default::default()
     })
 }
+
+fn cheap_daily_random(i: usize) -> usize {
+    xorshift(xorshift(Utc::now().num_days_from_ce() as u64) + i as u64) as usize
+}
+
+fn xorshift(mut x: u64) -> u64 {
+    x ^= x << 13;
+    x ^= x >> 7;
+    x ^= x << 17;
+    x
+}