chore: refactor chat registry

crates/chats/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "chats"
+version = "0.1.0"
+edition = "2021"
+publish = false
+
+[dependencies]
+common = { path = "../common" }
+state = { path = "../state" }
+
+gpui.workspace = true
+nostr-sdk.workspace = true
+anyhow.workspace = true
+itertools.workspace = true
+smol.workspace = true
+chrono.workspace = true

crates/chats/src/lib.rs

@@ -0,0 +1,2 @@
+pub mod registry;
+pub mod room;

crates/chats/src/registry.rs

@@ -0,0 +1,175 @@
+use async_utility::tokio::sync::oneshot;
+use common::utils::{compare, room_hash, signer_public_key};
+use gpui::{App, AppContext, Context, Entity, Global};
+use itertools::Itertools;
+use nostr_sdk::prelude::*;
+use state::get_client;
+use std::cmp::Reverse;
+
+use crate::room::Room;
+
+pub fn init(cx: &mut App) {
+    ChatRegistry::register(cx);
+}
+
+struct GlobalChatRegistry(Entity<ChatRegistry>);
+
+impl Global for GlobalChatRegistry {}
+
+pub struct ChatRegistry {
+    rooms: Vec<Entity<Room>>,
+    is_loading: bool,
+}
+
+impl ChatRegistry {
+    pub fn global(cx: &mut App) -> Option<Entity<Self>> {
+        cx.try_global::<GlobalChatRegistry>()
+            .map(|global| global.0.clone())
+    }
+
+    pub fn register(cx: &mut App) -> Entity<Self> {
+        Self::global(cx).unwrap_or_else(|| {
+            let entity = cx.new(Self::new);
+            // Set global state
+            cx.set_global(GlobalChatRegistry(entity.clone()));
+            // Observe and load metadata for any new rooms
+            cx.observe_new::<Room>(|this, _window, cx| {
+                let client = get_client();
+                let pubkeys = this.pubkeys();
+                let (tx, rx) = oneshot::channel::<Vec<(PublicKey, Metadata)>>();
+
+                cx.background_spawn(async move {
+                    let mut profiles = Vec::new();
+
+                    for public_key in pubkeys.into_iter() {
+                        if let Ok(metadata) = client.database().metadata(public_key).await {
+                            profiles.push((public_key, metadata.unwrap_or_default()));
+                        }
+                    }
+
+                    _ = tx.send(profiles);
+                })
+                .detach();
+
+                cx.spawn(|this, mut cx| async move {
+                    if let Ok(profiles) = rx.await {
+                        if let Some(room) = this.upgrade() {
+                            _ = cx.update_entity(&room, |this, cx| {
+                                for profile in profiles.into_iter() {
+                                    this.set_metadata(profile.0, profile.1);
+                                }
+                                cx.notify();
+                            });
+                        }
+                    }
+                })
+                .detach();
+            })
+            .detach();
+
+            entity
+        })
+    }
+
+    fn new(_cx: &mut Context<Self>) -> Self {
+        Self {
+            rooms: Vec::with_capacity(5),
+            is_loading: true,
+        }
+    }
+
+    pub fn current_rooms_ids(&self, cx: &mut Context<Self>) -> Vec<u64> {
+        self.rooms.iter().map(|room| room.read(cx).id).collect()
+    }
+
+    pub fn load_chat_rooms(&mut self, cx: &mut Context<Self>) {
+        let client = get_client();
+        let (tx, rx) = oneshot::channel::<Vec<Event>>();
+
+        cx.background_spawn(async move {
+            if let Ok(public_key) = signer_public_key(client).await {
+                let filter = Filter::new()
+                    .kind(Kind::PrivateDirectMessage)
+                    .author(public_key);
+
+                // Get all DM events from database
+                if let Ok(events) = client.database().query(filter).await {
+                    let result: Vec<Event> = events
+                        .into_iter()
+                        .filter(|ev| ev.tags.public_keys().peekable().peek().is_some())
+                        .unique_by(room_hash)
+                        .sorted_by_key(|ev| Reverse(ev.created_at))
+                        .collect();
+
+                    _ = tx.send(result);
+                }
+            }
+        })
+        .detach();
+
+        cx.spawn(|this, cx| async move {
+            if let Ok(events) = rx.await {
+                _ = cx.update(|cx| {
+                    _ = this.update(cx, |this, cx| {
+                        let current_rooms = this.current_rooms_ids(cx);
+                        let items: Vec<Entity<Room>> = events
+                            .into_iter()
+                            .filter_map(|ev| {
+                                let new = room_hash(&ev);
+                                // Filter all seen events
+                                if !current_rooms.iter().any(|this| this == &new) {
+                                    Some(cx.new(|_| Room::parse(&ev)))
+                                } else {
+                                    None
+                                }
+                            })
+                            .collect();
+
+                        this.rooms.extend(items);
+                        this.is_loading = false;
+
+                        cx.notify();
+                    });
+                });
+            }
+        })
+        .detach();
+    }
+
+    pub fn rooms(&self) -> &Vec<Entity<Room>> {
+        &self.rooms
+    }
+
+    pub fn is_loading(&self) -> bool {
+        self.is_loading
+    }
+
+    pub fn get(&self, id: &u64, cx: &App) -> Option<Entity<Room>> {
+        self.rooms
+            .iter()
+            .find(|model| &model.read(cx).id == id)
+            .cloned()
+    }
+
+    pub fn push_message(&mut self, event: Event, cx: &mut Context<Self>) {
+        // Get all pubkeys from event's tags for comparision
+        let mut pubkeys: Vec<_> = event.tags.public_keys().copied().collect();
+        pubkeys.push(event.pubkey);
+
+        if let Some(room) = self
+            .rooms
+            .iter()
+            .find(|room| compare(&room.read(cx).pubkeys(), &pubkeys))
+        {
+            room.update(cx, |this, cx| {
+                this.last_seen.set(event.created_at);
+                this.new_messages.push(event);
+                cx.notify();
+            });
+        } else {
+            let room = cx.new(|_| Room::parse(&event));
+            self.rooms.insert(0, room);
+            cx.notify();
+        }
+    }
+}

crates/chats/src/room.rs

@@ -0,0 +1,192 @@
+use chrono::{Datelike, Local, TimeZone};
+use common::{
+    profile::NostrProfile,
+    utils::{compare, random_name, room_hash},
+};
+use gpui::SharedString;
+use nostr_sdk::prelude::*;
+use std::collections::HashSet;
+
+pub struct LastSeen(pub Timestamp);
+
+impl LastSeen {
+    pub fn ago(&self) -> SharedString {
+        let now = Local::now();
+        let input_time = Local.timestamp_opt(self.0.as_u64() as i64, 0).unwrap();
+        let diff = (now - input_time).num_hours();
+
+        if diff < 24 {
+            let duration = now.signed_duration_since(input_time);
+
+            if duration.num_seconds() < 60 {
+                "now".to_string().into()
+            } else if duration.num_minutes() == 1 {
+                "1m".to_string().into()
+            } else if duration.num_minutes() < 60 {
+                format!("{}m", duration.num_minutes()).into()
+            } else if duration.num_hours() == 1 {
+                "1h".to_string().into()
+            } else if duration.num_hours() < 24 {
+                format!("{}h", duration.num_hours()).into()
+            } else if duration.num_days() == 1 {
+                "1d".to_string().into()
+            } else {
+                format!("{}d", duration.num_days()).into()
+            }
+        } else {
+            input_time.format("%b %d").to_string().into()
+        }
+    }
+
+    pub fn human_readable(&self) -> SharedString {
+        let now = Local::now();
+        let input_time = Local.timestamp_opt(self.0.as_u64() as i64, 0).unwrap();
+
+        if input_time.day() == now.day() {
+            format!("Today at {}", input_time.format("%H:%M %p")).into()
+        } else if input_time.day() == now.day() - 1 {
+            format!("Yesterday at {}", input_time.format("%H:%M %p")).into()
+        } else {
+            format!(
+                "{}, {}",
+                input_time.format("%d/%m/%y"),
+                input_time.format("%H:%M %p")
+            )
+            .into()
+        }
+    }
+
+    pub fn set(&mut self, created_at: Timestamp) {
+        self.0 = created_at
+    }
+}
+
+pub struct Room {
+    pub id: u64,
+    pub title: Option<SharedString>,
+    pub owner: NostrProfile,        // Owner always match current user
+    pub members: Vec<NostrProfile>, // Extract from event's tags
+    pub last_seen: LastSeen,
+    pub is_group: bool,
+    pub new_messages: Vec<Event>, // Hold all new messages
+}
+
+impl PartialEq for Room {
+    fn eq(&self, other: &Self) -> bool {
+        let mut pubkeys: Vec<PublicKey> = self.members.iter().map(|m| m.public_key()).collect();
+        pubkeys.push(self.owner.public_key());
+
+        let mut pubkeys2: Vec<PublicKey> = other.members.iter().map(|m| m.public_key()).collect();
+        pubkeys2.push(other.owner.public_key());
+
+        compare(&pubkeys, &pubkeys2)
+    }
+}
+
+impl Room {
+    pub fn new(
+        id: u64,
+        owner: NostrProfile,
+        members: Vec<NostrProfile>,
+        title: Option<SharedString>,
+        last_seen: LastSeen,
+    ) -> Self {
+        let is_group = members.len() > 1;
+        let title = if title.is_none() {
+            Some(random_name(2).into())
+        } else {
+            title
+        };
+
+        Self {
+            id,
+            owner,
+            members,
+            title,
+            last_seen,
+            is_group,
+            new_messages: vec![],
+        }
+    }
+
+    /// Convert nostr event to room
+    pub fn parse(event: &Event) -> Room {
+        let id = room_hash(event);
+        let last_seen = LastSeen(event.created_at);
+
+        // Always equal to current user
+        let owner = NostrProfile::new(event.pubkey, Metadata::default());
+
+        // Get all pubkeys that invole in this group
+        let members: Vec<NostrProfile> = event
+            .tags
+            .public_keys()
+            .collect::<HashSet<_>>()
+            .into_iter()
+            .map(|public_key| NostrProfile::new(*public_key, Metadata::default()))
+            .collect();
+
+        // Get title from event's tags
+        let title = if let Some(tag) = event.tags.find(TagKind::Subject) {
+            tag.content().map(|s| s.to_owned().into())
+        } else {
+            None
+        };
+
+        Self::new(id, owner, members, title, last_seen)
+    }
+
+    /// Set contact's metadata by public key
+    pub fn set_metadata(&mut self, public_key: PublicKey, metadata: Metadata) {
+        if self.owner.public_key() == public_key {
+            self.owner.set_metadata(&metadata);
+        }
+
+        for member in self.members.iter_mut() {
+            if member.public_key() == public_key {
+                member.set_metadata(&metadata);
+            }
+        }
+    }
+
+    /// Get room's member by public key
+    pub fn member(&self, public_key: &PublicKey) -> Option<NostrProfile> {
+        if &self.owner.public_key() == public_key {
+            Some(self.owner.clone())
+        } else {
+            self.members
+                .iter()
+                .find(|m| &m.public_key() == public_key)
+                .cloned()
+        }
+    }
+
+    /// Get room's display name
+    pub fn name(&self) -> String {
+        if self.members.len() <= 2 {
+            self.members
+                .iter()
+                .map(|profile| profile.name())
+                .collect::<Vec<_>>()
+                .join(", ")
+        } else {
+            let name = self
+                .members
+                .iter()
+                .take(2)
+                .map(|profile| profile.name())
+                .collect::<Vec<_>>()
+                .join(", ");
+
+            format!("{}, +{}", name, self.members.len() - 2)
+        }
+    }
+
+    /// Get all public keys from current room
+    pub fn pubkeys(&self) -> Vec<PublicKey> {
+        let mut pubkeys: Vec<_> = self.members.iter().map(|m| m.public_key()).collect();
+        pubkeys.push(self.owner.public_key());
+
+        pubkeys
+    }
+}