hashtags: click hashtags to open them

Fixes: https://github.com/damus-io/notedeck/issues/695
Fixes: https://github.com/damus-io/notedeck/issues/713
Changelog-Added: Add ability to click hashtags
Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_columns/src/actionbar.rs

@@ -1,20 +1,19 @@
 use crate::{
     column::Columns,
     route::{Route, Router},
-    timeline::{ThreadSelection, TimelineCache, TimelineKind},
+    timeline::{TimelineCache, TimelineKind},
 };
 
-use enostr::{NoteId, Pubkey, RelayPool};
+use enostr::{NoteId, RelayPool};
 use nostrdb::{Ndb, NoteKey, Transaction};
-use notedeck::{note::root_note_id_from_selected_id, NoteCache, RootIdError, UnknownIds};
+use notedeck::{NoteCache, UnknownIds};
 use tracing::error;
 
-#[derive(Debug, Eq, PartialEq, Copy, Clone)]
+#[derive(Debug, Eq, PartialEq, Clone)]
 pub enum NoteAction {
     Reply(NoteId),
     Quote(NoteId),
-    OpenThread(NoteId),
-    OpenProfile(Pubkey),
+    OpenTimeline(TimelineKind),
 }
 
 pub struct NewNotes {
@@ -26,52 +25,6 @@ pub enum TimelineOpenResult {
     NewNotes(NewNotes),
 }
 
-/// open_thread is called when a note is selected and we need to navigate
-/// to a thread It is responsible for managing the subscription and
-/// making sure the thread is up to date. In a sense, it's a model for
-/// the thread view. We don't have a concept of model/view/controller etc
-/// in egui, but this is the closest thing to that.
-#[allow(clippy::too_many_arguments)]
-fn open_thread(
-    ndb: &Ndb,
-    txn: &Transaction,
-    router: &mut Router<Route>,
-    note_cache: &mut NoteCache,
-    pool: &mut RelayPool,
-    timeline_cache: &mut TimelineCache,
-    selected_note: &[u8; 32],
-) -> Option<TimelineOpenResult> {
-    router.route_to(Route::thread(
-        ThreadSelection::from_note_id(ndb, note_cache, txn, NoteId::new(*selected_note)).ok()?,
-    ));
-
-    match root_note_id_from_selected_id(ndb, note_cache, txn, selected_note) {
-        Ok(root_id) => timeline_cache.open(
-            ndb,
-            note_cache,
-            txn,
-            pool,
-            &TimelineKind::Thread(ThreadSelection::from_root_id(root_id.to_owned())),
-        ),
-
-        Err(RootIdError::NoteNotFound) => {
-            error!(
-                "open_thread: note not found: {}",
-                hex::encode(selected_note)
-            );
-            None
-        }
-
-        Err(RootIdError::NoRootId) => {
-            error!(
-                "open_thread: note has no root id: {}",
-                hex::encode(selected_note)
-            );
-            None
-        }
-    }
-}
-
 impl NoteAction {
     #[allow(clippy::too_many_arguments)]
     pub fn execute(
@@ -89,19 +42,9 @@ impl NoteAction {
                 None
             }
 
-            NoteAction::OpenThread(note_id) => open_thread(
-                ndb,
-                txn,
-                router,
-                note_cache,
-                pool,
-                timeline_cache,
-                note_id.bytes(),
-            ),
-
-            NoteAction::OpenProfile(pubkey) => {
-                router.route_to(Route::profile(*pubkey));
-                timeline_cache.open(ndb, note_cache, txn, pool, &TimelineKind::Profile(*pubkey))
+            NoteAction::OpenTimeline(kind) => {
+                router.route_to(Route::Timeline(kind.to_owned()));
+                timeline_cache.open(ndb, note_cache, txn, pool, kind)
             }
 
             NoteAction::Quote(note_id) => {
@@ -114,7 +57,7 @@ impl NoteAction {
     /// Execute the NoteAction and process the TimelineOpenResult
     #[allow(clippy::too_many_arguments)]
     pub fn execute_and_process_result(
-        self,
+        &self,
         ndb: &Ndb,
         columns: &mut Columns,
         col: usize,

crates/notedeck_columns/src/timeline/kind.rs

@@ -434,7 +434,7 @@ impl TimelineKind {
             TimelineKind::Hashtag(hashtag) => FilterState::ready(vec![Filter::new()
                 .kinds([1])
                 .limit(filter::default_limit())
-                .tags([hashtag.clone()], 't')
+                .tags([hashtag.to_lowercase()], 't')
                 .build()]),
 
             TimelineKind::Algo(algo_timeline) => match algo_timeline {

crates/notedeck_columns/src/timeline/mod.rs

@@ -247,7 +247,7 @@ impl Timeline {
         let filter = Filter::new()
             .kinds([1])
             .limit(filter::default_limit())
-            .tags([hashtag.clone()], 't')
+            .tags([hashtag.to_lowercase()], 't')
             .build();
 
         Timeline::new(

crates/notedeck_columns/src/ui/mention.rs

@@ -1,5 +1,5 @@
 use crate::ui;
-use crate::{actionbar::NoteAction, profile::get_display_name};
+use crate::{actionbar::NoteAction, profile::get_display_name, timeline::TimelineKind};
 use egui::Sense;
 use enostr::Pubkey;
 use nostrdb::{Ndb, Transaction};
@@ -89,7 +89,9 @@ fn mention_ui(
 
         let note_action = if resp.clicked() {
             ui::show_pointer(ui);
-            Some(NoteAction::OpenProfile(Pubkey::new(*pk)))
+            Some(NoteAction::OpenTimeline(TimelineKind::profile(
+                Pubkey::new(*pk),
+            )))
         } else if resp.hovered() {
             ui::show_pointer(ui);
             None

crates/notedeck_columns/src/ui/note/contents.rs

@@ -1,10 +1,9 @@
-use crate::actionbar::NoteAction;
-use crate::images::ImageType;
 use crate::ui::{
     self,
     note::{NoteOptions, NoteResponse},
     ProfilePic,
 };
+use crate::{actionbar::NoteAction, images::ImageType, timeline::TimelineKind};
 use egui::{Color32, Hyperlink, Image, RichText};
 use nostrdb::{BlockType, Mention, Ndb, Note, NoteKey, Transaction};
 use tracing::warn;
@@ -198,7 +197,15 @@ fn render_note_contents(
                 BlockType::Hashtag => {
                     #[cfg(feature = "profiling")]
                     puffin::profile_scope!("hashtag contents");
-                    ui.colored_label(link_color, format!("#{}", block.as_str()));
+                    let resp = ui.colored_label(link_color, format!("#{}", block.as_str()));
+
+                    if resp.clicked() {
+                        note_action = Some(NoteAction::OpenTimeline(TimelineKind::Hashtag(
+                            block.as_str().to_string(),
+                        )));
+                    } else if resp.hovered() {
+                        ui::show_pointer(ui);
+                    }
                 }
 
                 BlockType::Url => {

crates/notedeck_columns/src/ui/note/mod.rs

@@ -17,6 +17,7 @@ pub use reply_description::reply_desc;
 use crate::{
     actionbar::NoteAction,
     profile::get_display_name,
+    timeline::{ThreadSelection, TimelineKind},
     ui::{self, View},
 };
 
@@ -354,8 +355,9 @@ impl<'a> NoteView<'a> {
             ui.vertical(|ui| {
                 ui.horizontal(|ui| {
                     if self.pfp(note_key, &profile, ui).clicked() {
-                        note_action =
-                            Some(NoteAction::OpenProfile(Pubkey::new(*self.note.pubkey())));
+                        note_action = Some(NoteAction::OpenTimeline(TimelineKind::profile(
+                            Pubkey::new(*self.note.pubkey()),
+                        )));
                     };
 
                     let size = ui.available_size();
@@ -415,7 +417,7 @@ impl<'a> NoteView<'a> {
                 ui.add(&mut contents);
 
                 if let Some(action) = contents.action() {
-                    note_action = Some(*action);
+                    note_action = Some(action.clone());
                 }
 
                 if self.options().has_actionbar() {
@@ -430,7 +432,9 @@ impl<'a> NoteView<'a> {
             // main design
             ui.with_layout(egui::Layout::left_to_right(egui::Align::TOP), |ui| {
                 if self.pfp(note_key, &profile, ui).clicked() {
-                    note_action = Some(NoteAction::OpenProfile(Pubkey::new(*self.note.pubkey())));
+                    note_action = Some(NoteAction::OpenTimeline(TimelineKind::Profile(
+                        Pubkey::new(*self.note.pubkey()),
+                    )));
                 };
 
                 ui.with_layout(egui::Layout::top_down(egui::Align::LEFT), |ui| {
@@ -480,7 +484,7 @@ impl<'a> NoteView<'a> {
                     ui.add(&mut contents);
 
                     if let Some(action) = contents.action() {
-                        note_action = Some(*action);
+                        note_action = Some(action.clone());
                     }
 
                     if self.options().has_actionbar() {
@@ -496,7 +500,16 @@ impl<'a> NoteView<'a> {
         };
 
         let note_action = if note_hitbox_clicked(ui, hitbox_id, &response.rect, maybe_hitbox) {
-            Some(NoteAction::OpenThread(NoteId::new(*self.note.id())))
+            if let Ok(selection) = ThreadSelection::from_note_id(
+                self.ndb,
+                self.note_cache,
+                self.note.txn().unwrap(),
+                NoteId::new(*self.note.id()),
+            ) {
+                Some(NoteAction::OpenTimeline(TimelineKind::Thread(selection)))
+            } else {
+                None
+            }
         } else {
             note_action
         };