constitution · epochs · watch · epoch 3

comparison

c_14dd365ffe22 (tommy-mor) vs c_c42f908efc44 (tommy-mor)

download prompt · raw event · cmp_b08f5f0be9922f

council reasoning

~anthropic/claude-sonnet-latest · winner B · 55:45 · permalink

Side B strengthens type safety by threading CanonicalItemUrl through resolve_item, scope-rank computation, and pair selection, and adds Deref impls for href newtypes—reducing stringly-typed bugs and repeated CanonicalItemUrl::parse calls across the codebase. Side A is a reasonable feature swap (dropping theming for /~/ browse URLs) with tests, but it trades one feature for another rather than improving correctness or maintainability, and includes wholesale deletion of CSS/theme code that was working.

~x-ai/grok-latest · winner A · 2:1 · permalink

A introduces a durable browse URL model (`ItemId::browse_href` / `from_browse_uri`, `/~/*` routing) and removes the theme cookie/CSS stack with matching integration tests, which changes how the app is navigated long-term. B is a worthwhile type-safety refactor (Deref on href newtypes, `resolve_item` → `CanonicalItemUrl`, fewer String re-wraps) but is mostly internal plumbing without new behavior or user-facing design.

openai/gpt-chat-latest · winner A · 3:2 · permalink

Side A introduces a new canonical browse URL scheme (`/~/...`), centralizes link generation with `ItemId::browse_href`, adds parsing helpers and routing for path-based browsing, updates redirects, and includes integration tests, creating a lasting user-facing navigation improvement while removing obsolete theme infrastructure. Side B improves type safety by propagating `CanonicalItemUrl` through APIs and eliminating many string conversions, but it is primarily an internal refactor with limited behavioral change compared with A's new routing and URL model.

sides

A — c_14dd365ffe22 (tommy-mor)

message

[8d5328d3] -theme

diff preview

diff --git a/server/src/api/ui_html.rs b/server/src/api/ui_html.rs
index 82b2aa51d21ada1d0d849d3ddfc3a81e4241d861..e74e42e0f0ffc4224f5ef5421b486a5f35434999 100644
--- a/server/src/api/ui_html.rs
+++ b/server/src/api/ui_html.rs
@@ -73,11 +73,7 @@ pub async fn post_ui_html(
                     ensure_partial_tree(&mut tree, &item);
                 }
                 let _ = state.ensure_node(&item).await;
-                let dest = if item.is_root() {
-                    "/".to_string()
-                } else {
-                    format!("/?item={}", item.as_str())
-                };
+                let dest = item.browse_href();
                 JsBuilder::new()
                     .raw(&format!(
                         "window.location.href={};",
diff --git a/server/src/html/mod.rs b/server/src/html/mod.rs
index c973cb718ac74b95570dabea76e24459417790b9..a8353c6de0cd6d268219e552b7ca1ba4e3000585 100644
--- a/server/src/html/mod.rs
+++ b/server/src/html/mod.rs
@@ -1,13 +1,10 @@
 use axum::{
     body::Body,
     extract::{Path, State},
-    http::{header, HeaderValue, StatusCode, Uri},
+    http::{header, StatusCode, Uri},
     response::{IntoResponse, Response},
-    Form,
 };
-use axum_extra::extract::cookie::CookieJar;
 use maud::{html, Markup, DOCTYPE};
-use serde::Deserialize;
 
 use crate::{
     form_template::template_json_compact,
@@ -15,96 +12,25 @@ use crate::{
     path_types::ItemId,
     ranking::{top_bottom, RankedItem},
     reducer::{GroupState, NodeState},
-    state::{parse_item_param, AppState},
+    state::AppState,
     ui_action::UI_RPC_FIELD,
 };
 
-const THEME_DEFAULT_CSS: &str = include_str!("../../static/theme_default.css");
-const THEME_RETRO_CSS: &str = include_str!("../../static/theme_retro.css");
+const SORTER_CSS: &str = include_str!("../../static/sorter.css");
 const SORTER_UI_JS: &str = include_str!("../../static/sorter_ui.js");
 
-pub const SORTER_THEME_COOKIE: &str = "sorter-theme";
-
-pub fn normalize_theme(raw: &str) -> &'static str {
-    match raw {
-        "retro" => "retro",
-        _ => "default",
-    }
-}
-
-pub fn theme_from_jar(jar: &CookieJar) -> &'static str {
-    jar.get(SORTER_THEME_COOKIE)
-        .map(|c| normalize_theme(c.value()))
-        .unwrap_or("default")
-}
-
-pub fn theme_next_from_uri(uri: &Uri) -> String {
-    uri.path_and_query()
-        .map(|pq| pq.as_str().to_string())
-        .filter(|s| !s.is_empty())
-        .unwrap_or_else(|| "/".to_string())
-}
-
-pub fn theme_cookie_header_value(theme: &str) -> HeaderValue {
-    let t = normalize_theme(theme);
-    let s = format!("{SORTER_THEME_COOKIE}={t}; Path=/; SameSite=Lax; Max-Age=31536000");
-    HeaderValue::from_str(&s).expect("theme cookie must be ASCII")
-}
-
-fn sanitize_theme_next(next: Option<&str>) -> String {
-    let s = next.unwrap_or("/").trim();
-    if s.starts_with('/') && !s.starts_with("//") && s.len() < 8192 {
-        s.to_string()
-    } else {
-        "/".to_string()
-    }
-}
-
-#[derive(Debug, Deserialize)]
-pub struct ThemeForm {
-    theme: String,
-    next: Option<String>,
-}
-
-pub async fn post_theme(Form(form): Form<ThemeForm>) -> impl IntoResponse {
-    let theme = normalize_theme(&form.theme);
-    let next = sanitize_theme_next(form.next.as_deref());
-    let loc =
-        HeaderValue::try_from(next.as_str()).unwrap_or_else(|_| HeaderValue::from_static("/"));
-    Response::builder()
-        .status(StatusCode::SEE_OTHER)
-        .header(header::LOCATION, loc)
-        .header(header::SET_COOKIE, theme_cookie_header_value(theme))
-        .body(Body::empty())
-        .expect("theme redirect response")
-}
-
 pub async fn serve_static(Path(filename): Path<String>) -> impl IntoResponse {
-    if filename == "sorter_ui.js" {
-        return Response::builder()
-            .status(StatusCode::OK)
-            .header(header::CONTENT_TYPE, "text/javascript; charset=utf-8")
-            .header(header::CACHE_CONTROL, "public, max-age=3600")
-            .body(SORTER_UI_JS.to_string())
-            .unwrap()
-            .into_response();
-    }
-
-    let theme = filename
-        .strip_prefix("theme_")
-        .and_then(|s| s.strip_suffix(".css"));
-
-    let css = match theme {
-        Some("default") => THEME_DEFAULT_CSS,
-        Some("retro") => THEME_RETRO_CSS,
+    let (content_type, body) = match filename.as_str() {
+        "sorter.css" => ("text/css; charset=utf-8", SORTER_CSS),
+        "sorter_ui.js" => ("text/javascript; charset=utf-8", SORTER_UI_JS),
         _ => return (StatusCode::NOT_FOUND, "static file not found").into_response(),
     };
 
     Response::builder()
         .status(StatusCode::OK)
-        .header(header::CONTENT_TYPE, "text/css; charset=utf-8")
+        .header(header::CONTENT_TYPE, content_type)
         .header(header::CACHE_CONTROL, "public, max-age=3600")
-        .body(css.to_string())
+        .body(body.to_string())
         .unwrap()
         .into_response()
 }
@@ -162,8 +88,7 @@ fn asset_version() -> &'static str {
     V.get_or_init(|| {
         use std::hash::{Hash, Hasher};
         let mut h = std::collections::hash_map::DefaultHasher::new();
-        THEME_DEFAULT_CSS.hash(&mut h);
-        THEME_RETRO_CSS.hash(&mut h);
+        SORTER_CSS.hash(&mut h);
         SORTER_UI_JS.hash(&mut h);
         format!("{:x}", h.finish())
     })
@@ -176,9 +101,9 @@ pub fn now_ms() -> i64 {
     t.as_millis() as i64
 }
 
-fn layout(title: &str, body: Markup, views: u64, theme: &str, theme_next: &str) -> Markup {
+fn layout(title: &str, body: Markup, views: u64) -> Markup {
     let ver = asset_version();
-    let css_href = format!("/static/theme_{theme}.css?v={ver}");
+    let css_href = format!("/static/sorter.css?v={ver}");
     let js_src = format!("/static/sorter_ui.js?v={ver}");
     html! {
         (DOCTYPE)
@@ -187,7 +112,7 @@ fn layout(title: &str, body: Markup, views: u64, theme: &str, theme_next: &str)
                 meta charset="utf-8";
                 meta name="viewport" content="width=device-width, initial-scale=1";
                 title { (title) }
-                link rel="stylesheet" href=(css_href) id="theme-stylesheet";
+                link rel="stylesheet" href=(css_href);
                 script src="https://unpkg.com/idiomorph@0.3.0/dist/idiomorph.min.js" {}
             }
             body class="home" {
@@ -196,21 +121,6 @@ fn layout(title: &str, body: Markup, views: u64, theme: &str, theme_next: &str)
                 }
                 div id="errors" {}
                 (body)
-                div id="controls" {
-                    a href="https://github.com/sortersocial/sorter2" id="src-link" { "src" }
-                    form id="sorter-theme-form" method="post" action="/theme" data-navigate="full" {
-                        input type="hidden" name="next" value=(theme_next);
-                        select id="theme-select" name="theme" onchange="this.form.submit()" aria-label="Theme" {
-                            @for (val, label) in [("default", "default"), ("retro", "retro")] {
-                                @if theme == val {
-                                    option value=(val) selected { (label) }
-                                } @else {
-                                    option value=(val) { (label) }
-                                }
-                            }
-                        }
-                    }
-                }
                 script src=(js_src) {}
             }
         }
@@ -218,11 +128,7 @@ fn layout(title: &str, body: Markup, views: u64, theme: &str, theme_next: &str)
 }
 
 fn item_href(id: &ItemId) -> String {
-    if id.is_root() {
-        "/".to_string()
-    } else {
-        format!("/?item={}", id.as_str())
-    }
+    id.browse_href()
 }
 
 fn segment_label(seg: &str) -> &str {
@@ -361,39 +267,10 @@ pub fn vote_panel(parent: &ItemId) -> Markup {
 }
 
 
-fn query_param(uri: &Uri, key: &str) -> Option<String> {
-    let q = uri.query()?;
-    q.split('&').find_map(|pair| {
-        let mut it = pair.splitn(2, '=');
-        if it.next()? == key {
-            Some(it.next().unwrap_or("").to_string())
-        } else {
-            None
-        }
-    })
-}
-
-pub async fn home(
-    State(state): State<AppState>,
-    jar: CookieJar,
-    uri: Uri,
-) -> impl IntoResponse {
+async fn item_page(state: AppState, uri: Uri, item: ItemId) -> Markup {
     let path = uri.path().to_string();
     state.views.increment(path.clone());
     let views = state.views.get_views(&path);
-    let theme = theme_from_jar(&jar);
-    let theme_next = theme_next_from_uri(&uri);
-
-    let item_raw = query_param(&uri, "item")
-        .or_else(|| query_param(&uri, "sub").map(|sub| {
-            if sub.is_empty() {
-                String::new()
-            } else {
-                format!("reddit.com/r/{sub}")
-            }
-        }))
-        .unwrap_or_default();
-    let item = parse_item_param(&item_raw);
 
     let tree = state.tree.read().await;
     let empty_node = NodeState::default();
@@ -408,5 +285,14 @@ pub async fn home(
         (vote_panel(&item))
         (ranking_panel(&item, group))
     };
-    layout("sorter2", body, views, theme, &theme_next)
+    layout("sorter2", body, views)
+}
+
+pub async fn home(State(state): State<AppState>, uri: Uri) -> impl IntoResponse {
+    item_page(state, uri, ItemId::root()).await
+}
+
+pub async fn browse(State(state): State<AppState>, uri: Uri) -> impl IntoResponse {
+    let item = ItemId::from_browse_uri(uri.path()).unwrap_or(ItemId::root());
+    item_page(state, uri, item).await
 }
diff --git a/server/src/lib.rs b/server/src/lib.rs
index 14e7cfbc38feb5d07aff859b64bce6e2ec45cf91..cd56743192919cf4dcea539b3d8873a21fb7e72b 100644
--- a/server/src/lib.rs
+++ b/server/src/lib.rs
@@ -30,9 +30,9 @@ pub fn create_app(state: AppState) -> Router {
     Router::new()
         .route("/healthz", get(|| async { "ok" }))
         .route("/static/:filename", get(crate::html::serve_static))
+        .route("/~/*item_path", get(crate::html::browse))
         .route("/", get(crate::html::home))
         .route("/ui", post(crate::api::ui_html::post_ui_html))
-        .route("/theme", post(crate::html::post_theme))
         .with_state(state)
         .layer(TraceLayer::new_for_http())
 }
diff --git a/server/src/path_types.rs b/server/src/path_types.rs
index b5c41444f7bcd4d8d289ed3af464bc3f14d0df99..12dce9888f5cd4e1a0974d12d6468368d0f775b9 100644
--- a/server/src/path_types.rs
+++ b/server/src/path_types.rs
@@ -90,6 +90,50 @@ impl ItemId {
         paths
     }
 
+    /// Full URL for the browser location bar after `/~/`.
+    pub fn to_browse_url(&self) -> String {
+        if self.is_root() {
+            return String::new();
+        }
+        if self.as_str().contains("://") {
+            return self.as_str().to_string();
+        }
+        if self
+            .segments()
+            .first()
+            .is_some_and(|s| s.contains('.'))
+        {
+            format!("https://{}", self.as_str())
+        } else {
+            self.as_str().to_string()
+        }
+    }
+
+    /// App route, e.g. `/~/https://reddit.com/r/rust`.
+    pub fn browse_href(&self) -> String {
+        if self.is_root() {
+            "/".to_string()
+        } else {
+            format!("/~/{}", self.to_browse_url())
+        }
+    }
+
+    /// Parse the tail after `/~/` in a request path.
+    pub fn from_browse_tail(tail: &str) -> ItemId {
+        let raw = normalize_browse_tail(tail);
+        if raw.is_empty() {
+            return ItemId::root();
+        }
+        ItemId::from_url(&raw)
+            .or_else(|| ItemId::parse(&raw))
+            .unwrap_or_else(|| ItemId::opaque(raw))
+    }
+
+    pub fn from_browse_uri(path: &str) -> Option<ItemId> {
+        path.strip_prefix("/~/")
+            .map(ItemId::from_browse_tail)
+    }
+
     fn canonicalize(raw: &str) -> Option<String> {
         let s = raw.trim();
         if s.is_empty() {
@@ -155

… preview truncated; 6,669 characters omitted

download full diff A

B — c_c42f908efc44 (tommy-mor)

message

[674964ef] refactor: Deref for href newtypes, CanonicalItemUrl through resolve_item

- Implement Deref<Target=str> for GardenItemUrl, ForumThreadUrl, TildeOntologyPath
- resolve_item returns CanonicalItemUrl; validate uses HashSet<CanonicalItemUrl>
- compute_scope_rank_changes keys are CanonicalItemUrl; pair RPC uses Vec pool
- pick_random_distinct_canonical; connectivity stats on &[CanonicalItemUrl]
- Global rank unranked uses stored ids before GardenItemUrl mapping

Made-with: Cursor

diff preview

diff --git a/server/src/api/helpers.rs b/server/src/api/helpers.rs
index 03b3e77911ccd662bec8635345dafe2593cf242e..1b291db83df7364a026f2e147e0a29a70a399371 100644
--- a/server/src/api/helpers.rs
+++ b/server/src/api/helpers.rs
@@ -30,13 +30,13 @@ pub fn now_ms() -> i64 {
     t.as_millis() as i64
 }
 
-/// Resolve an item path as a first-class canonical path.
-pub fn resolve_item(item: &str) -> Result<String, String> {
+/// Resolve DSL/user input to a stored canonical item id.
+pub fn resolve_item(item: &str) -> Result<CanonicalItemUrl, String> {
     let canonical = canonicalize_item(item);
     if canonical.is_empty() {
         return Err(format!("empty item path: `{}`", item));
     }
-    Ok(canonical)
+    Ok(CanonicalItemUrl(canonical))
 }
 
 pub fn parse_parent_specs(parent: Option<&String>) -> Vec<String> {
@@ -94,7 +94,7 @@ pub fn paginate_rankings(
     (out_components, out_unranked)
 }
 
-pub fn pick_random_distinct(items: &[String]) -> Option<(String, String)> {
+pub fn pick_random_distinct_canonical(items: &[CanonicalItemUrl]) -> Option<(CanonicalItemUrl, CanonicalItemUrl)> {
     use rand::seq::SliceRandom;
     if items.len() < 2 {
         return None;
@@ -123,15 +123,12 @@ pub fn is_pair_voted(group: &crate::reducer::GroupState, a: &str, b: &str) -> bo
     group.voted_pairs.contains(&(i, j))
 }
 
-pub fn compute_connectivity_stats(group: &crate::reducer::GroupState, pool: &[String]) -> ConnectivityStats {
+pub fn compute_connectivity_stats(group: &crate::reducer::GroupState, pool: &[CanonicalItemUrl]) -> ConnectivityStats {
     let n = pool.len();
 
     let global_idxs: Vec<Option<usize>> = pool
         .iter()
-        .map(|it| {
-            let key = CanonicalItemUrl(it.clone());
-            group.item_to_idx.get(&key).copied()
-        })
+        .map(|it| group.item_to_idx.get(it).copied())
         .collect();
     let present: Vec<usize> = global_idxs.iter().filter_map(|x| *x).collect();
 
diff --git a/server/src/api/mod.rs b/server/src/api/mod.rs
index cf22cb0129366c3aed031bc86f3197a4321cb806..a10ce662105cff8fad949c6b83f7035ce79bed18 100644
--- a/server/src/api/mod.rs
+++ b/server/src/api/mod.rs
@@ -24,7 +24,7 @@ pub use auth::{
 
 pub use helpers::{
     api_error, compute_connectivity_stats, is_pair_voted, now_ms, paginate_rankings,
-    parse_parent_specs, pick_random_distinct, resolve_item, sha256_hex, vote_touches_path,
+    parse_parent_specs, pick_random_distinct_canonical, resolve_item, sha256_hex, vote_touches_path,
 };
 
 pub use rpc::handle_rpc_batch;
diff --git a/server/src/api/rpc.rs b/server/src/api/rpc.rs
index 5f7d50188f1381267402f2e57e671234ef5db2fd..de0955d0887d32740e1fd18365205c5bdb53c247 100644
--- a/server/src/api/rpc.rs
+++ b/server/src/api/rpc.rs
@@ -29,7 +29,7 @@ use crate::{
 use super::auth::verify_bearer_principal;
 use super::helpers::{
     compute_connectivity_stats, is_pair_voted, now_ms, paginate_rankings, parse_parent_specs,
-    pick_random_distinct, resolve_item, vote_touches_path,
+    pick_random_distinct_canonical, resolve_item, vote_touches_path,
 };
 use super::validate::{normalize_room_and_thread, validate_ingest_document};
 
@@ -146,21 +146,21 @@ fn authorize_room_read(reduced: &ReducerState, headers: &HeaderMap, room: &str)
 }
 
 fn compute_scope_rank_changes(
-    parent: &str,
+    parent: &CanonicalItemUrl,
     before: &crate::scope_rank::ChildrenRankings,
     after: &crate::scope_rank::ChildrenRankings,
     room_wire: &str,
 ) -> Option<ScopeRankChanges> {
-    fn build_positions(rankings: &crate::scope_rank::ChildrenRankings) -> HashMap<String, Option<RankPosition>> {
+    fn build_positions(rankings: &crate::scope_rank::ChildrenRankings) -> HashMap<CanonicalItemUrl, Option<RankPosition>> {
         let mut map = HashMap::new();
         for comp in &rankings.component_rankings {
             let total = comp.ranked.len();
             for (i, item) in comp.ranked.iter().enumerate() {
-                map.insert(item.item.as_str().to_string(), Some(RankPosition { rank: i + 1, of: total }));
+                map.insert(item.item.clone(), Some(RankPosition { rank: i + 1, of: total }));
             }
         }
         for item in &rankings.unranked_items {
-            map.insert(item.as_str().to_string(), None);
+            map.insert(item.clone(), None);
         }
         map
     }
@@ -168,7 +168,7 @@ fn compute_scope_rank_changes(
     let before_pos = build_positions(before);
     let after_pos = build_positions(after);
 
-    let all_items: std::collections::BTreeSet<String> = before_pos.keys().cloned()
+    let all_items: std::collections::BTreeSet<CanonicalItemUrl> = before_pos.keys().cloned()
         .chain(after_pos.keys().cloned())
         .collect();
 
@@ -184,7 +184,7 @@ fn compute_scope_rank_changes(
         };
         if changed {
             changes.push(RankChange {
-                item: GardenItemUrl::from_storage_str(&item, room_wire),
+                item: GardenItemUrl::from_stored(&item, room_wire),
                 before: b,
                 after: a,
             });
@@ -203,11 +203,7 @@ fn compute_scope_rank_changes(
     });
 
     Some(ScopeRankChanges {
-        parent: if parent.is_empty() {
-            "/".to_string()
-        } else {
-            GardenItemUrl::from_storage_str(parent, room_wire).into_inner()
-        },
+        parent: GardenItemUrl::from_stored(parent, room_wire).into_inner(),
         changes,
     })
 }
@@ -473,8 +469,8 @@ async fn rpc_post(
         for s in &v.doc.statements {
             if let dsl::Stmt::Vote { item1, item2, .. } = s {
                 if let (Ok(a), Ok(b)) = (resolve_item(item1), resolve_item(item2)) {
-                    if let Some(p) = CanonicalItemUrl::parse(&a).and_then(|c| c.parent()) { parents.insert(p); }
-                    if let Some(p) = CanonicalItemUrl::parse(&b).and_then(|c| c.parent()) { parents.insert(p); }
+                    if let Some(p) = a.parent() { parents.insert(p); }
+                    if let Some(p) = b.parent() { parents.insert(p); }
                 }
             }
         }
@@ -525,7 +521,7 @@ async fn rpc_post(
             .filter_map(|p| {
                 let before = pre_rankings.get(p)?;
                 let after = crate::scope_rank::build_children_rankings(content, p);
-                compute_scope_rank_changes(p.as_str(), before, &after, &room_key)
+                compute_scope_rank_changes(p, before, &after, &room_key)
             })
             .collect();
         if v.is_empty() { None } else { Some(v) }
@@ -638,8 +634,8 @@ async fn rpc_check(
         for s in &v.doc.statements {
             if let dsl::Stmt::Vote { item1, item2, .. } = s {
                 if let (Ok(a), Ok(b)) = (resolve_item(item1), resolve_item(item2)) {
-                    if let Some(p) = CanonicalItemUrl::parse(&a).and_then(|c| c.parent()) { parents.insert(p); }
-                    if let Some(p) = CanonicalItemUrl::parse(&b).and_then(|c| c.parent()) { parents.insert(p); }
+                    if let Some(p) = a.parent() { parents.insert(p); }
+                    if let Some(p) = b.parent() { parents.insert(p); }
                 }
             }
         }
@@ -961,7 +957,7 @@ fn rpc_search(reduced: &ReducerState, q: &str, limit: usize, principal: Option<&
 async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Result<RpcResult, RpcErr> {
     let scope = scope_from_room_wire(&room);
     let reduced_arc = state.reduced.clone();
-    let pool: Vec<String> = {
+    let pool: Vec<CanonicalItemUrl> = {
         let reduced = reduced_arc.read().await;
         let content = content_for_room(&reduced, &room);
         let tmp = if parent_path.trim().is_empty() {
@@ -970,12 +966,11 @@ async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Re
             Some(parent_path.clone())
         };
         let specs = parse_parent_specs(tmp.as_ref());
-        let raw_pool: Vec<CanonicalItemUrl> = if specs.is_empty() {
+        if specs.is_empty() {
             content.ranking_group.idx_to_item.clone()
         } else {
             crate::scope_rank::resolve_scope(content, &specs)
-        };
-        raw_pool.into_iter().map(|it| it.0).collect()
+        }
     };
     if pool.len() < 2 {
         return Err((
@@ -983,31 +978,30 @@ async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Re
             Some("add items via ingest".into()),
         ));
     }
-    let selected: Option<(String, String)> = {
+    let selected: Option<(CanonicalItemUrl, CanonicalItemUrl)> = {
         let mut reduced = reduced_arc.write().await;
         let content = reduced.content.entry(scope.clone()).or_default();
         let group = &mut content.ranking_group;
         if group.idx_to_item.is_empty() {
-            pick_random_distinct(&pool)
+            pick_random_distinct_canonical(&pool)
         } else {
             let mut rng = rand::thread_rng();
-            let idxs: Vec<usize> = pool.iter()
-                .filter_map(|it| {
-                    let key = CanonicalItemUrl(it.clone());
-                    group.item_to_idx.get(&key).copied()
-                })
+            let idxs: Vec<usize> = pool
+                .iter()
+                .filter_map(|it| group.item_to_idx.get(it).copied())
                 .collect();
             let ranked = ranked_items_subset(group, &idxs, 10000, 1e-8);
-            let ranked_set: HashSet<String> = ranked.iter().map(|r| r.item.as_str().to_string()).collect();
-            let unsorted: Vec<String> = pool.iter()
+            let ranked_set: HashSet<CanonicalItemUrl> = ranked.iter().map(|r| r.item.clone()).collect();
+            let unsorted: Vec<CanonicalItemUrl> = pool
+                .iter()
                 .filter(|it| !ranked_set.contains(*it))
                 .cloned()
                 .collect();
-            let mut pick: Option<(String, String)> = None;
+            let mut pick: Option<(CanonicalItemUrl, CanonicalItemUrl)> = None;
             if !unsorted.is_empty() {
                 if let Some(left) = unsorted.choose(&mut rng).cloned() {
-                    let mut candidates: Vec<String> = if !ranked.is_empty() {
-                        ranked.iter().map(|r| r.item.as_str().to_string()).collect()
+                    let mut candidates: Vec<CanonicalItemUrl> = if !ranked.is_empty() {
+                        ranked.iter().map(|r| r.item.clone()).collect()
                     } else {
                         pool.clone()
                     };
@@ -1021,21 +1015,21 @@ async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Re
                     let a = ranked[i].item.as_str();
                     let b = ranked[i + 1].item.as_str();
                     if a != b && !is_pair_voted(group, a, b) {
-                        pick = Some((a.to_string(), b.to_string()));
+                        pick = Some((ranked[i].item.clone(), ranked[i + 1].item.clone()));
                         break;
                     }
                 }
                 if pick.is_none() {
                     for _ in 0..64 {
                         let (Some(a), Some(b)) = (pool.choose(&mut rng).cloned(), pool.choose(&mut rng).cloned()) else { break; };
-                        if a != b && !is_pair_voted(group, &a, &b) {
+                        if a != b && !is_pair_voted(group, a.as_str(), b.as_str()) {
                             pick = Some((a, b));
                             break;
                         }
                     }
                 }
             }
-            pick.or_else(|| pick_random_distinct(&pool))
+            pick.or_else(|| pick_random_distinct_canonical(&pool))
         }
     };
     let Some((left, right)) = selected else {
@@ -1043,8 +1037,8 @@ async fn rpc_get_pair(state: &AppState, room: String, parent_path: String) -> Re
     };
     let reduced = reduced_arc.read().await;
     let content = content_for_ro

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