Merge branch 'development'

Cargo.lock

@@ -1458,6 +1458,7 @@ dependencies = [
  "futures-util",
  "headers",
  "hyper",
+ "idna",
  "itertools 0.11.0",
  "lru",
  "magnetar_calckey_model",
@@ -1535,6 +1536,7 @@ name = "magnetar_common"
 version = "0.2.1-alpha"
 dependencies = [
  "magnetar_core",
+ "magnetar_sdk",
  "percent-encoding",
  "serde",
  "thiserror",

Cargo.toml

@@ -37,6 +37,7 @@ futures-util = "0.3"
 headers = "0.3"
 http = "0.2"
 hyper = "0.14"
+idna = "0.4"
 itertools = "0.11"
 lru = "0.12"
 miette = "5.9"
@@ -87,6 +88,8 @@ tokio = { workspace = true, features = ["full"] }
 tower = { workspace = true }
 tower-http = { workspace = true, features = ["cors", "trace", "fs"] }
 
+idna = { workspace = true }
+
 tracing-subscriber = { workspace = true, features = ["env-filter"] }
 tracing = { workspace = true }
 

ext_calckey_model/src/emoji.rs

@@ -0,0 +1,103 @@
+use crate::{CalckeyDbError, CalckeyModel};
+use ck::emoji;
+use sea_orm::prelude::Expr;
+use sea_orm::{ColumnTrait, EntityTrait, IntoSimpleExpr, QueryFilter, QueryOrder};
+
+#[derive(Debug, Copy, Clone)]
+pub struct EmojiTag<'a> {
+    pub name: &'a str,
+    pub host: Option<&'a str>,
+}
+
+pub struct EmojiResolver(CalckeyModel);
+
+impl EmojiResolver {
+    pub fn new(db: CalckeyModel) -> Self {
+        EmojiResolver(db)
+    }
+
+    pub async fn get_local_emoji(&self) -> Result<Vec<emoji::Model>, CalckeyDbError> {
+        Ok(emoji::Entity::find()
+            .filter(emoji::Column::Host.is_null())
+            .order_by_asc(emoji::Column::Category)
+            .order_by_asc(emoji::Column::Name)
+            .all(self.0.inner())
+            .await?)
+    }
+
+    pub async fn fetch_emoji(
+        &self,
+        shortcode: &str,
+        host: Option<&str>,
+    ) -> Result<Option<emoji::Model>, CalckeyDbError> {
+        let host_filter = if let Some(host) = host {
+            emoji::Column::Host.eq(host)
+        } else {
+            emoji::Column::Host.is_null()
+        };
+
+        let name_filter = emoji::Column::Name.eq(shortcode);
+        let filter = host_filter.and(name_filter);
+
+        Ok(emoji::Entity::find()
+            .filter(filter)
+            .one(self.0.inner())
+            .await?)
+    }
+
+    pub async fn fetch_many_emojis(
+        &self,
+        shortcodes: &[String],
+        host: Option<&str>,
+    ) -> Result<Vec<emoji::Model>, CalckeyDbError> {
+        let host_filter = if let Some(host) = host {
+            emoji::Column::Host.eq(host)
+        } else {
+            emoji::Column::Host.is_null()
+        };
+
+        let name_filter = emoji::Column::Name.is_in(shortcodes);
+        let filter = host_filter.and(name_filter);
+
+        Ok(emoji::Entity::find()
+            .filter(filter)
+            .all(self.0.inner())
+            .await?)
+    }
+
+    pub async fn fetch_many_tagged_emojis(
+        &self,
+        shortcodes: &[EmojiTag<'_>],
+    ) -> Result<Vec<emoji::Model>, CalckeyDbError> {
+        let remote_shortcode_host_pairs = shortcodes
+            .iter()
+            .filter_map(|s| {
+                s.host.map(|host| {
+                    Expr::tuple([
+                        Expr::value(s.name.to_string()),
+                        Expr::value(host.to_string()),
+                    ])
+                })
+            })
+            .collect::<Vec<_>>();
+        let local_shortcodes = shortcodes
+            .iter()
+            .filter_map(|s| s.host.is_none().then_some(s.name.to_string()))
+            .collect::<Vec<_>>();
+
+        let remote_filter = Expr::tuple([
+            emoji::Column::Name.into_simple_expr(),
+            emoji::Column::Host.into_simple_expr(),
+        ])
+        .is_in(remote_shortcode_host_pairs);
+        let local_filter = emoji::Column::Name
+            .is_in(local_shortcodes)
+            .and(emoji::Column::Host.is_null());
+        let filter = remote_filter.or(local_filter);
+
+        Ok(emoji::Entity::find()
+            .filter(filter)
+            .all(self.0.inner())
+            .await?)
+    }
+}

ext_calckey_model/src/lib.rs

@@ -1,3 +1,4 @@
+pub mod emoji;
 pub mod note_model;
 
 pub use ck;
@@ -192,48 +193,6 @@ impl CalckeyModel {
             .await?)
     }
 
-    pub async fn get_local_emoji(&self) -> Result<Vec<emoji::Model>, CalckeyDbError> {
-        Ok(emoji::Entity::find()
-            .filter(emoji::Column::Host.is_null())
-            .order_by_asc(emoji::Column::Category)
-            .order_by_asc(emoji::Column::Name)
-            .all(&self.0)
-            .await?)
-    }
-
-    pub async fn fetch_emoji(
-        &self,
-        shortcode: &str,
-        host: Option<&str>,
-    ) -> Result<Option<emoji::Model>, CalckeyDbError> {
-        let host_filter = if let Some(host) = host {
-            emoji::Column::Host.eq(host)
-        } else {
-            emoji::Column::Host.is_null()
-        };
-
-        let name_filter = emoji::Column::Name.eq(shortcode);
-        let filter = host_filter.and(name_filter);
-
-        Ok(emoji::Entity::find().filter(filter).one(&self.0).await?)
-    }
-    pub async fn fetch_many_emojis(
-        &self,
-        shortcodes: &[String],
-        host: Option<&str>,
-    ) -> Result<Vec<emoji::Model>, CalckeyDbError> {
-        let host_filter = if let Some(host) = host {
-            emoji::Column::Host.eq(host)
-        } else {
-            emoji::Column::Host.is_null()
-        };
-
-        let name_filter = emoji::Column::Name.is_in(shortcodes);
-        let filter = host_filter.and(name_filter);
-
-        Ok(emoji::Entity::find().filter(filter).all(&self.0).await?)
-    }
-
     pub async fn get_access_token(
         &self,
         token: &str,

magnetar_common/Cargo.toml

@@ -8,6 +8,7 @@ crate-type = ["rlib"]
 
 [dependencies]
 magnetar_core = { path = "../core" }
+magnetar_sdk = { path = "../magnetar_sdk" }
 
 percent-encoding = { workspace = true }
 serde = { workspace = true, features = ["derive"] }

magnetar_common/src/util.rs

@@ -1,4 +1,6 @@
 use magnetar_core::web_model::acct::Acct;
+use magnetar_sdk::mmm;
+use magnetar_sdk::mmm::Token;
 use percent_encoding::percent_decode_str;
 use std::borrow::Cow;
 use thiserror::Error;
@@ -17,6 +19,12 @@ pub enum FediverseTagParseError {
     InvalidUtf8(#[from] std::str::Utf8Error),
 }
 
+impl From<&FediverseTagParseError> for &str {
+    fn from(_: &FediverseTagParseError) -> Self {
+        "FediverseTagParseError"
+    }
+}
+
 impl<S1: AsRef<str>, S2: AsRef<str>> From<(S1, Option<S2>)> for FediverseTag {
     fn from((name, host): (S1, Option<S2>)) -> Self {
         Self {
@@ -106,3 +114,24 @@ pub fn lenient_parse_tag_decode(
         host: host_decoded,
     })
 }
+
+#[derive(Debug)]
+pub enum RawReaction {
+    Unicode(String),
+    Shortcode {
+        shortcode: String,
+        host: Option<String>,
+    },
+}
+
+pub fn parse_reaction(tag: impl AsRef<str>) -> Option<RawReaction> {
+    let tok = mmm::Context::default().parse_ui(tag.as_ref());
+
+    match tok {
+        Token::UnicodeEmoji(text) => Some(RawReaction::Unicode(text)),
+        Token::ShortcodeEmoji { shortcode, host } => {
+            Some(RawReaction::Shortcode { shortcode, host })
+        }
+        _ => None,
+    }
+}

magnetar_mmm_parser/src/lib.rs

@@ -86,7 +86,10 @@ pub enum Token {
         mention_type: MentionType,
     },
     UnicodeEmoji(String),
-    ShortcodeEmoji(String),
+    ShortcodeEmoji {
+        shortcode: String,
+        host: Option<String>,
+    },
     Hashtag(String),
 }
 
@@ -109,7 +112,6 @@ impl Token {
             Token::Function { inner, .. } => inner.str_content_left(),
             Token::Mention { name, .. } => Some(name.as_ref()),
             Token::UnicodeEmoji(code) => Some(code.as_ref()),
-            Token::ShortcodeEmoji(_) => None,
             Token::Hashtag(tag) => Some(tag.as_ref()),
             _ => None,
         }
@@ -160,7 +162,7 @@ impl Token {
             Token::Function { inner, .. } => inner.inner(),
             Token::Mention { name, .. } => Token::PlainText(name.clone().into()),
             Token::UnicodeEmoji(code) => Token::PlainText(code.clone().into()),
-            Token::ShortcodeEmoji(shortcode) => Token::PlainText(shortcode.clone().into()),
+            Token::ShortcodeEmoji { shortcode, .. } => Token::PlainText(shortcode.clone().into()),
             Token::Hashtag(tag) => Token::PlainText(tag.clone().into()),
         }
     }
@@ -406,10 +408,14 @@ impl Token {
                     .create_element("ue")
                     .write_text_content(BytesText::new(text))?;
             }
-            Token::ShortcodeEmoji(shortcode) => {
-                writer
-                    .create_element("ee")
-                    .write_text_content(BytesText::new(shortcode))?;
+            Token::ShortcodeEmoji { shortcode, host } => {
+                let mut ew = writer.create_element("ee");
+
+                if let Some(host) = host {
+                    ew = ew.with_attribute(("host", host.as_str()));
+                }
+
+                ew.write_text_content(BytesText::new(shortcode))?;
             }
             Token::Hashtag(tag) => {
                 writer
@@ -1492,10 +1498,26 @@ impl Context {
             )))),
             Span::into_fragment,
         )(input)?;
+        let (input, host) = opt(map(
+            tuple((
+                tag("@"),
+                map(
+                    recognize(many1(alt((alphanumeric1, recognize(one_of("-.")))))),
+                    Span::into_fragment,
+                ),
+            )),
+            |(_at, host)| host,
+        ))(input)?;
         let (input, _) = tag(":")(input)?;
         let (input, _) = not(alphanumeric1_unicode)(input)?;
 
-        Ok((input, Token::ShortcodeEmoji(shortcode.into())))
+        Ok((
+            input,
+            Token::ShortcodeEmoji {
+                shortcode: shortcode.into(),
+                host: host.map(str::to_string),
+            },
+        ))
     }
 
     fn tag_mention<'a>(&self, input: Span<'a>) -> IResult<Span<'a>, Token> {
@@ -2242,17 +2264,34 @@ text</center>"#
     fn parse_shortcodes() {
         assert_eq!(
             parse_full(":bottom:"),
-            Token::ShortcodeEmoji("bottom".into())
+            Token::ShortcodeEmoji {
+                shortcode: "bottom".into(),
+                host: None
+            }
         );
 
         assert_eq!(
             parse_full(":bottom::blobfox:"),
             Token::Sequence(vec![
-                Token::ShortcodeEmoji("bottom".into()),
-                Token::ShortcodeEmoji("blobfox".into())
+                Token::ShortcodeEmoji {
+                    shortcode: "bottom".into(),
+                    host: None
+                },
+                Token::ShortcodeEmoji {
+                    shortcode: "blobfox".into(),
+                    host: None
+                }
             ])
         );
 
+        assert_eq!(
+            parse_full(":bottom@magnetar.social:"),
+            Token::ShortcodeEmoji {
+                shortcode: "bottom".into(),
+                host: Some("magnetar.social".into())
+            }
+        );
+
         assert_eq!(
             parse_full(":bottom:blobfox"),
             Token::PlainText(":bottom:blobfox".into())

magnetar_sdk/src/endpoints/user.rs

@@ -53,3 +53,14 @@ pub struct UserByIdReq {
     response = PackUserMaybeAll
 )]
 pub struct GetUserById;
+
+// Get user by fedi tag
+
+#[derive(Endpoint)]
+#[endpoint(
+    endpoint = "/users/by-acct/:user_id",
+    method = Method::GET,
+    request = UserByIdReq,
+    response = PackUserMaybeAll
+)]
+pub struct GetUserByAcct;

magnetar_sdk/src/types/note.rs

@@ -63,8 +63,9 @@ pub struct NoteBase {
     pub renoted_note_id: Option<String>,
     pub reply_count: u64,
     pub renote_count: u64,
+    pub mentions: Vec<String>,
     pub hashtags: Vec<String>,
-    pub reactions: Vec<PackReactionBase>,
+    pub reactions: Vec<ReactionPair>,
     pub local_only: bool,
     pub has_poll: bool,
     pub file_ids: Vec<String>,
@@ -97,37 +98,17 @@ pack!(
 );
 
 #[derive(Clone, Debug, Deserialize, Serialize, TS)]
+#[serde(untagged)]
 pub enum Reaction {
     Unicode(String),
-    Shortcode(String),
+    Shortcode {
+        name: String,
+        host: Option<String>,
+        url: String,
+    },
+    Unknown {
+        raw: String,
+    },
 }
 
-impl Reaction {
-    pub fn guess_from(s: &str, default_emote: &str) -> Option<Self> {
-        let code = s.trim();
-        match code.chars().next() {
-            Some(':') => Some(Reaction::Shortcode(code.to_string())),
-            Some(_) => Some(Reaction::Unicode(code.to_string())),
-            None => Self::guess_from(default_emote, "👍"),
-        }
-    }
-}
-
-#[derive(Clone, Debug, Deserialize, Serialize, TS)]
-pub struct ReactionBase {
-    pub created_at: DateTime<Utc>,
-    pub user_id: String,
-    pub reaction: Reaction,
-}
-
-pack!(PackReactionBase, Required<Id> as id & Required<ReactionBase> as reaction);
-
-#[derive(Clone, Debug, Deserialize, Serialize, TS)]
-pub struct ReactionUserExt {
-    pub user: Box<PackUserBase>,
-}
-
-pack!(
-    PackReactionWithUser,
-    Required<Id> as id & Required<ReactionBase> as reaction & Required<ReactionUserExt> as user
-);
+pub type ReactionPair = (Reaction, usize);

src/api_v1/mod.rs

@@ -2,7 +2,7 @@ mod note;
 mod user;
 
 use crate::api_v1::note::handle_note;
-use crate::api_v1::user::{handle_user_info, handle_user_info_self};
+use crate::api_v1::user::{handle_user_info, handle_user_info_by_acct, handle_user_info_self};
 use crate::service::MagnetarService;
 use crate::web::auth;
 use crate::web::auth::AuthState;
@@ -14,6 +14,7 @@ use std::sync::Arc;
 pub fn create_api_router(service: Arc<MagnetarService>) -> Router {
     Router::new()
         .route("/users/@self", get(handle_user_info_self))
+        .route("/users/by-acct/:id", get(handle_user_info_by_acct))
         .route("/users/:id", get(handle_user_info))
         .route("/notes/:id", get(handle_note))
         .layer(from_fn_with_state(

src/api_v1/user.rs

@@ -5,10 +5,12 @@ use crate::web::auth::{AuthenticatedUser, MaybeUser};
 use crate::web::{ApiError, ObjectNotFound};
 use axum::extract::{Path, Query, State};
 use axum::Json;
-use magnetar_sdk::endpoints::user::{GetUserById, GetUserSelf, UserByIdReq, UserSelfReq};
+use magnetar_common::util::lenient_parse_tag;
+use magnetar_sdk::endpoints::user::{
+    GetUserByAcct, GetUserById, GetUserSelf, UserByIdReq, UserSelfReq,
+};
 use magnetar_sdk::endpoints::{Req, Res};
 use std::sync::Arc;
-
 pub async fn handle_user_info_self(
     Query(UserSelfReq {
         detail: _,
@@ -45,7 +47,37 @@ pub async fn handle_user_info(
         .db
         .get_user_by_id(&id)
         .await?
-        .ok_or_else(|| ObjectNotFound(id))?;
+        .ok_or(ObjectNotFound(id))?;
+
+    let user = UserModel.base_from_existing(&ctx, &user_model).await?;
+    Ok(Json(user.into()))
+}
+
+pub async fn handle_user_info_by_acct(
+    Path(tag_str): Path<String>,
+    Query(UserByIdReq {
+        detail: _,
+        pins: _,
+        profile: _,
+        relation: _,
+        auth: _,
+    }): Query<Req<GetUserByAcct>>,
+    State(service): State<Arc<MagnetarService>>,
+    MaybeUser(self_user): MaybeUser,
+) -> Result<Json<Res<GetUserByAcct>>, ApiError> {
+    // TODO: Extended properties!
+
+    let mut tag = lenient_parse_tag(&tag_str)?;
+    if matches!(&tag.host, Some(host) if host == &service.config.networking.host) {
+        tag.host = None;
+    }
+
+    let ctx = PackingContext::new(service.clone(), self_user).await?;
+    let user_model = service
+        .db
+        .get_user_by_tag(&tag.name, tag.host.as_deref())
+        .await?
+        .ok_or(ObjectNotFound(tag_str))?;
 
     let user = UserModel.base_from_existing(&ctx, &user_model).await?;
     Ok(Json(user.into()))

src/model/data/note.rs

@@ -1,12 +1,12 @@
 use magnetar_calckey_model::ck;
 use magnetar_sdk::types::note::{
-    NoteDetailExt, PackNoteWithMaybeAttachments, PackPollBase, Reaction,
+    NoteDetailExt, PackNoteWithMaybeAttachments, PackPollBase, ReactionPair,
 };
 use magnetar_sdk::types::user::PackUserBase;
 use magnetar_sdk::types::{
     drive::PackDriveFileBase,
     emoji::EmojiContext,
-    note::{NoteAttachmentExt, NoteBase, NoteVisibility, PackReactionBase, ReactionBase},
+    note::{NoteAttachmentExt, NoteBase, NoteVisibility},
     user::UserBase,
     MmXml,
 };
@@ -14,25 +14,11 @@ use magnetar_sdk::{Packed, Required};
 
 use crate::model::{PackType, PackingContext};
 
-impl PackType<&ck::note_reaction::Model> for ReactionBase {
-    fn extract(context: &PackingContext, reaction: &ck::note_reaction::Model) -> Self {
-        ReactionBase {
-            created_at: reaction.created_at.into(),
-            user_id: reaction.user_id.clone(),
-            reaction: Reaction::guess_from(
-                &reaction.reaction,
-                &context.instance_meta.default_reaction,
-            )
-            .unwrap_or_else(|| /* Shouldn't happen */ Reaction::Unicode("👍".to_string())),
-        }
-    }
-}
-
 pub struct NoteBaseSource<'a> {
     pub note: &'a ck::note::Model,
     pub cw_mm: Option<&'a MmXml>,
     pub text_mm: Option<&'a MmXml>,
-    pub reactions: &'a Vec<PackReactionBase>,
+    pub reactions: &'a Vec<ReactionPair>,
     pub user: &'a UserBase,
     pub emoji_context: &'a EmojiContext,
 }
@@ -73,6 +59,7 @@ impl PackType<NoteBaseSource<'_>> for NoteBase {
             renoted_note_id: note.renote_id.clone(),
             reply_count: note.replies_count as u64,
             renote_count: note.renote_count as u64,
+            mentions: note.mentions.clone(),
             hashtags: note.tags.clone(),
             reactions: reactions.clone(),
             local_only: note.local_only,

src/model/processing/emoji.rs

@@ -2,6 +2,7 @@ use crate::model::processing::PackResult;
 use crate::model::{PackType, PackingContext};
 use itertools::Itertools;
 use magnetar_calckey_model::ck;
+use magnetar_calckey_model::emoji::EmojiTag;
 use magnetar_sdk::types::emoji::{EmojiBase, PackEmojiBase};
 use magnetar_sdk::types::Id;
 use magnetar_sdk::{Packed, Required};
@@ -28,6 +29,17 @@ impl EmojiModel {
         Ok(packed_emojis)
     }
 
+    pub async fn fetch_many_tag_emojis(
+        &self,
+        ctx: &PackingContext,
+        tags: &[EmojiTag<'_>],
+    ) -> PackResult<Vec<PackEmojiBase>> {
+        let emojis = ctx.service.emoji_cache.get_many_tagged(tags).await?;
+        let packed_emojis = emojis.iter().map(|e| self.pack_existing(ctx, &e)).collect();
+
+        Ok(packed_emojis)
+    }
+
     pub fn deduplicate_emoji(&self, ctx: &PackingContext, emoji_list: Vec<String>) -> Vec<String> {
         emoji_list
             .into_iter()

src/model/processing/mod.rs

@@ -23,6 +23,8 @@ pub enum PackError {
     InstanceMetaCacheError(#[from] InstanceMetaCacheError),
     #[error("Generic cache error: {0}")]
     GenericCacheError(#[from] GenericIdCacheError),
+    #[error("Deserializer error: {0}")]
+    DeserializerError(#[from] serde_json::Error),
 }
 
 pub type PackResult<T> = Result<T, PackError>;
@@ -31,8 +33,9 @@ fn get_mm_token_emoji(token: &Token) -> Vec<String> {
     let mut v = Vec::new();
     token.walk_map_collect(
         &|t| {
-            if let Token::ShortcodeEmoji(e) = t {
-                Some(e.to_owned())
+            // TODO: Remote emoji
+            if let Token::ShortcodeEmoji { shortcode, .. } = t {
+                Some(shortcode.to_owned())
             } else {
                 None
             }

src/model/processing/note.rs

@@ -2,12 +2,14 @@ use crate::model::data::id::BaseId;
 use crate::model::data::note::{NoteAttachmentSource, NoteBaseSource, NoteDetailSource};
 use crate::model::processing::emoji::EmojiModel;
 use crate::model::processing::user::UserModel;
-use crate::model::processing::{get_mm_token_emoji, PackResult};
+use crate::model::processing::{get_mm_token_emoji, PackError, PackResult};
 use crate::model::{PackType, PackingContext, UserRelationship};
 use compact_str::CompactString;
 use either::Either;
 use futures_util::future::try_join_all;
+use futures_util::TryFutureExt;
 use magnetar_calckey_model::ck::sea_orm_active_enums::NoteVisibilityEnum;
+use magnetar_calckey_model::emoji::EmojiTag;
 use magnetar_calckey_model::note_model::{
     NoteData, NoteResolveOptions, NoteVisibilityFilterFactory,
 };
@@ -15,15 +17,17 @@ use magnetar_calckey_model::sea_orm::prelude::Expr;
 use magnetar_calckey_model::sea_orm::sea_query::{Alias, IntoIden, PgFunc, Query, SimpleExpr};
 use magnetar_calckey_model::sea_orm::{ActiveEnum, ColumnTrait, IntoSimpleExpr};
 use magnetar_calckey_model::{ck, CalckeyDbError};
+use magnetar_common::util::{parse_reaction, RawReaction};
 use magnetar_sdk::mmm::Token;
 use magnetar_sdk::types::drive::PackDriveFileBase;
 use magnetar_sdk::types::emoji::EmojiContext;
 use magnetar_sdk::types::note::{
     NoteAttachmentExt, NoteBase, NoteDetailExt, PackNoteBase, PackNoteMaybeFull,
-    PackNoteWithMaybeAttachments,
+    PackNoteWithMaybeAttachments, Reaction,
 };
 use magnetar_sdk::types::{Id, MmXml};
 use magnetar_sdk::{mmm, Packed, Required};
+use serde::Deserialize;
 use tokio::try_join;
 
 use super::drive::DriveModel;
@@ -214,10 +218,80 @@ impl NoteModel {
         }
 
         let emoji_model = EmojiModel;
+
         let shortcodes = emoji_model.deduplicate_emoji(ctx, emoji_extracted);
-        let emojis = emoji_model
-            .fetch_many_emojis(ctx, &shortcodes, note_data.user.host.as_deref())
-            .await?;
+        // Parse the JSON into an ordered map and turn it into a Vec of pairs, parsing the reaction codes
+        // Failed reaction parses -> Left, Successful ones -> Right
+        let reactions_raw =
+            serde_json::Map::<String, serde_json::Value>::deserialize(&note_data.note.reactions)?
+                .into_iter()
+                .map(|(code, count)| {
+                    (
+                        parse_reaction(&code).map_or_else(|| Either::Left(code), Either::Right),
+                        count,
+                    )
+                })
+                .map(|(code, count)| Ok((code, usize::deserialize(count)?)))
+                .collect::<Result<Vec<_>, serde_json::Error>>()?;
+        // Pick out all successfully-parsed shortcode emojis
+        let reactions_to_resolve = reactions_raw
+            .iter()
+            .map(|(code, _)| code)
+            .map(Either::as_ref)
+            .filter_map(Either::right)
+            .filter_map(|c| match c {
+                RawReaction::Shortcode { shortcode, host } => Some(EmojiTag {
+                    name: shortcode,
+                    host: host.as_deref(),
+                }),
+                _ => None,
+            })
+            .collect::<Vec<_>>();
+
+        let reaction_fetch = ctx
+            .service
+            .emoji_cache
+            .get_many_tagged(&reactions_to_resolve)
+            .map_err(PackError::from);
+        let emoji_fetch =
+            emoji_model.fetch_many_emojis(ctx, &shortcodes, note_data.user.host.as_deref());
+
+        let (reactions_fetched, emojis) = try_join!(reaction_fetch, emoji_fetch)?;
+
+        // Left reactions and the Right ones that didn't resolve to any emoji are turned back into Unknown
+        let reactions = &reactions_raw
+            .into_iter()
+            .map(|(raw, count)| {
+                (
+                    raw.either(
+                        |raw| Reaction::Unknown { raw },
+                        |raw| match raw {
+                            RawReaction::Unicode(text) => Reaction::Unicode(text),
+                            RawReaction::Shortcode { shortcode, host } => reactions_fetched
+                                .iter()
+                                .find(|e| e.host == host && e.name == shortcode)
+                                .map_or_else(
+                                    || Reaction::Unknown {
+                                        raw: format!(
+                                            ":{shortcode}{}:",
+                                            host.as_deref()
+                                                .map(|h| format!("@{h}"))
+                                                .unwrap_or_default()
+                                        ),
+                                    },
+                                    |e| Reaction::Shortcode {
+                                        name: shortcode.clone(),
+                                        host: host.clone(),
+                                        url: e.public_url.clone(),
+                                    },
+                                ),
+                        },
+                    ),
+                    count,
+                )
+            })
+            .collect::<Vec<_>>();
+
         let emoji_context = &EmojiContext(emojis);
 
         let note_base = NoteBase::extract(
@@ -236,7 +310,7 @@ impl NoteModel {
                     .and_then(Result::ok)
                     .map(MmXml)
                     .as_ref(),
-                reactions: &vec![],
+                reactions,
                 user,
                 emoji_context,
             },
@@ -353,7 +427,7 @@ impl NoteModel {
         let extract_renote_attachments =
             self.extract_renote_target_attachemnts(ctx, &drive_model, &note);
 
-        // TODO: Polls, reactions, ...
+        // TODO: Polls, ...
 
         let (
             PackNoteBase { id, note },

src/service/emoji_cache.rs

@@ -1,5 +1,6 @@
 use crate::web::ApiError;
 use lru::LruCache;
+use magnetar_calckey_model::emoji::{EmojiResolver, EmojiTag};
 use magnetar_calckey_model::{ck, CalckeyDbError, CalckeyModel};
 use std::collections::HashSet;
 use std::sync::Arc;
@@ -33,7 +34,7 @@ struct EmojiLocator {
 
 pub struct EmojiCacheService {
     cache: Mutex<LruCache<EmojiLocator, Arc<ck::emoji::Model>>>,
-    db: CalckeyModel,
+    db: EmojiResolver,
 }
 
 impl EmojiCacheService {
@@ -41,7 +42,7 @@ impl EmojiCacheService {
         const CACHE_SIZE: usize = 4096;
         Self {
             cache: Mutex::new(LruCache::new(CACHE_SIZE.try_into().unwrap())),
-            db,
+            db: EmojiResolver::new(db),
         }
     }
 
@@ -78,7 +79,7 @@ impl EmojiCacheService {
         host: Option<&str>,
     ) -> Result<Vec<Arc<ck::emoji::Model>>, EmojiCacheError> {
         let locs = names
-            .into_iter()
+            .iter()
             .map(|n| EmojiLocator {
                 name: n.clone(),
                 host: host.map(str::to_string),
@@ -119,4 +120,54 @@ impl EmojiCacheService {
 
         Ok(resolved)
     }
+
+    pub async fn get_many_tagged(
+        &self,
+        tags: &[EmojiTag<'_>],
+    ) -> Result<Vec<Arc<ck::emoji::Model>>, EmojiCacheError> {
+        let locs = tags
+            .iter()
+            .map(|tag| EmojiLocator {
+                name: tag.name.to_string(),
+                host: tag.host.map(str::to_string),
+            })
+            .collect::<HashSet<_>>();
+        let mut to_resolve = Vec::new();
+        let mut resolved = Vec::new();
+
+        let mut read = self.cache.lock().await;
+        for loc in locs.iter() {
+            if let Some(emoji) = read.get(loc) {
+                resolved.push(emoji.clone());
+            } else {
+                to_resolve.push(EmojiTag {
+                    name: &loc.name,
+                    host: loc.host.as_deref(),
+                });
+            }
+        }
+        drop(read);
+
+        let emoji = self
+            .db
+            .fetch_many_tagged_emojis(&to_resolve)
+            .await?
+            .into_iter()
+            .map(Arc::new)
+            .collect::<Vec<_>>();
+        resolved.extend(emoji.iter().cloned());
+
+        let mut write = self.cache.lock().await;
+        emoji.iter().for_each(|e| {
+            write.put(
+                EmojiLocator {
+                    name: e.name.clone(),
+                    host: e.host.clone(),
+                },
+                e.clone(),
+            );
+        });
+
+        Ok(resolved)
+    }
 }

src/web/mod.rs

@@ -3,6 +3,7 @@ use axum::http::StatusCode;
 use axum::response::{IntoResponse, Response};
 use axum::Json;
 use magnetar_calckey_model::{CalckeyCacheError, CalckeyDbError};
+use magnetar_common::util::FediverseTagParseError;
 use serde::Serialize;
 use serde_json::json;
 
@@ -55,6 +56,20 @@ impl IntoResponse for ApiError {
     }
 }
 
+impl From<FediverseTagParseError> for ApiError {
+    fn from(err: FediverseTagParseError) -> Self {
+        Self {
+            status: StatusCode::BAD_REQUEST,
+            code: err.error_code(),
+            message: if cfg!(debug_assertions) {
+                format!("Fediverse tag parse error: {}", err)
+            } else {
+                "Fediverse tag parse error".to_string()
+            },
+        }
+    }
+}
+
 impl From<CalckeyDbError> for ApiError {
     fn from(err: CalckeyDbError) -> Self {
         Self {