Implement basic reactions

backend/models.py

@@ -1,5 +1,5 @@
 from sqlalchemy.ext.declarative import declarative_base
-from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey, inspect, null, text
+from sqlalchemy import Column, Integer, String, Text, Boolean, DateTime, ForeignKey, inspect, null, text, UniqueConstraint
 from sqlalchemy.orm import relationship
 from datetime import datetime
 from pydantic import BaseModel
@@ -36,6 +36,7 @@ class Message(Base):
     author = relationship("User", back_populates="messages")
     reply_to = relationship("Message", remote_side=[id])
     files = relationship("MessageFile", back_populates="message", cascade="all, delete-orphan", lazy="select")
+    reactions = relationship("Reaction", cascade="all, delete-orphan", lazy="select")
 
 
 class MessageFile(Base):
@@ -106,6 +107,22 @@ class PushSubscription(Base):
     updated_at = Column(DateTime, default=datetime.now, onupdate=datetime.now)
 
 
+class Reaction(Base):
+    __tablename__ = "reaction"
+
+    id = Column(Integer, primary_key=True, index=True)
+    message_id = Column(Integer, ForeignKey("message.id"), nullable=False, index=True)
+    user_id = Column(Integer, ForeignKey("user.id"), nullable=False)
+    emoji = Column(String(10), nullable=False)  # Store emoji as string
+    timestamp = Column(DateTime, default=datetime.now)
+    
+    # Relationships
+    user = relationship("User")
+    
+    # Ensure unique combination of message, user, and emoji
+    __table_args__ = (UniqueConstraint('message_id', 'user_id', 'emoji', name='unique_reaction'),)
+
+
 # Pydantic модели
 class LoginRequest(BaseModel):
     username: str
@@ -166,5 +183,22 @@ class MessageResponse(BaseModel):
         from_attributes = True
 
 
+class ReactionRequest(BaseModel):
+    message_id: int
+    emoji: str
+
+
+class ReactionResponse(BaseModel):
+    id: int
+    message_id: int
+    user_id: int
+    emoji: str
+    timestamp: datetime
+    username: str
+
+    class Config:
+        from_attributes = True
+
+
 # Tables are now created through Alembic migrations
 # Base.metadata.create_all(bind=engine)

backend/routes/messaging.py

@@ -10,7 +10,7 @@ from fastapi.security import HTTPAuthorizationCredentials
 from sqlalchemy.orm import Session
 from dependencies import get_current_user, get_db
 from constants import OWNER_USERNAME
-from models import Message, SendMessageRequest, EditMessageRequest, User, DMEnvelope, MessageFile, DMFile
+from models import Message, SendMessageRequest, EditMessageRequest, User, DMEnvelope, MessageFile, DMFile, Reaction, ReactionRequest, ReactionResponse
 from push_service import push_service
 from PIL import Image
 import io
@@ -31,6 +31,23 @@ os.makedirs(FILES_ENCRYPTED_DIR, exist_ok=True)
 
 
 def convert_message(msg: Message) -> dict:
+    # Group reactions by emoji
+    reactions_dict = {}
+    if msg.reactions:
+        for reaction in msg.reactions:
+            emoji = reaction.emoji
+            if emoji not in reactions_dict:
+                reactions_dict[emoji] = {
+                    "emoji": emoji,
+                    "count": 0,
+                    "users": []
+                }
+            reactions_dict[emoji]["count"] += 1
+            reactions_dict[emoji]["users"].append({
+                "id": reaction.user_id,
+                "username": reaction.user.username
+            })
+    
     return {
         "id": msg.id,
         "content": msg.content,
@@ -40,6 +57,7 @@ def convert_message(msg: Message) -> dict:
         "username": msg.author.username,
         "profile_picture": msg.author.profile_picture,
         "reply_to": convert_message(msg.reply_to) if msg.reply_to else None,
+        "reactions": list(reactions_dict.values()),
         "files": [
             {
                 "path": f"/api/uploads/files/normal/{Path(f.path).name}",
@@ -436,6 +454,63 @@ async def delete_message(
     
     return {"status": "success", "message_id": message_id}
 
+
+@router.post("/add_reaction")
+async def add_reaction(
+    request: ReactionRequest,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    # Check if message exists
+    message = db.query(Message).filter(Message.id == request.message_id).first()
+    if not message:
+        raise HTTPException(status_code=404, detail="Message not found")
+    
+    # Check if reaction already exists
+    existing_reaction = db.query(Reaction).filter(
+        Reaction.message_id == request.message_id,
+        Reaction.user_id == current_user.id,
+        Reaction.emoji == request.emoji
+    ).first()
+    
+    if existing_reaction:
+        # Remove existing reaction (toggle off)
+        db.delete(existing_reaction)
+        action = "removed"
+    else:
+        # Add new reaction
+        new_reaction = Reaction(
+            message_id=request.message_id,
+            user_id=current_user.id,
+            emoji=request.emoji
+        )
+        db.add(new_reaction)
+        action = "added"
+    
+    db.commit()
+    
+    # Refresh message to get updated reactions
+    db.refresh(message)
+    
+    # Broadcast reaction update
+    try:
+        from .messaging import messagingManager
+        await messagingManager.broadcast({
+            "type": "reactionUpdate",
+            "data": {
+                "message_id": request.message_id,
+                "emoji": request.emoji,
+                "action": action,
+                "user_id": current_user.id,
+                "username": current_user.username,
+                "reactions": convert_message(message)["reactions"]
+            }
+        })
+    except Exception:
+        pass
+    
+    return {"status": "success", "action": action, "reactions": convert_message(message)["reactions"]}
+
 class MessaggingSocketManager:
     def __init__(self) -> None:
         self.connections: list[WebSocket] = []
@@ -670,6 +745,36 @@ class MessaggingSocketManager:
                         "data": {"message_id": message_id}
                     })
 
+                    await websocket.send_json({"type": type, "data": response})
+                except HTTPException as e:
+                    await self.send_error(websocket, type, e)
+            elif type == "addReaction":
+                try:
+                    current_user = get_current_user_inner()
+                    if not current_user:
+                        raise HTTPException(401)
+                    
+                    request_data = data["data"]
+                    reaction_request = ReactionRequest(
+                        message_id=request_data["message_id"],
+                        emoji=request_data["emoji"]
+                    )
+                    
+                    response = await add_reaction(reaction_request, current_user, db)
+                    
+                    # Broadcast reaction update
+                    await self.broadcast({
+                        "type": "reactionUpdate",
+                        "data": {
+                            "message_id": request_data["message_id"],
+                            "emoji": request_data["emoji"],
+                            "action": response["action"],
+                            "user_id": current_user.id,
+                            "username": current_user.username,
+                            "reactions": response["reactions"]
+                        }
+                    })
+
                     await websocket.send_json({"type": type, "data": response})
                 except HTTPException as e:
                     await self.send_error(websocket, type, e)

frontend/src/pages/app/core/types.d.ts

@@ -51,6 +51,15 @@ export interface Rect extends Size2D {
  * @property {string} [profile_picture] - URL to sender's profile picture
  * @property {Message} [reply_to] - The message this is replying to
  */
+export interface Reaction {
+    emoji: string;
+    count: number;
+    users: Array<{
+        id: number;
+        username: string;
+    }>;
+}
+
 export interface Message {
     id: number;
     username: string;
@@ -61,6 +70,7 @@ export interface Message {
     profile_picture?: string;
     reply_to?: Message;
     files?: Attachment[];
+    reactions?: Reaction[];
 
     runtimeData?: {
         dmEnvelope?: DmEnvelope;
@@ -313,6 +323,15 @@ export interface SendMessageRequest extends WebSocketMessage {
     }
 }
 
+export interface AddReactionRequest extends WebSocketMessage {
+    type: "addReaction",
+    credentials: WebSocketCredentials;
+    data: {
+        message_id: number;
+        emoji: string;
+    }
+}
+
 // Messages
 export interface DMNewWebSocketMessage extends WebSocketMessage {
     type: "dmNew",
@@ -348,9 +367,21 @@ export interface NewMessageWebSocketMessage extends WebSocketMessage {
     data: Message
 }
 
+export interface ReactionUpdateWebSocketMessage extends WebSocketMessage {
+    type: "reactionUpdate",
+    data: {
+        message_id: number;
+        emoji: string;
+        action: "added" | "removed";
+        user_id: number;
+        username: string;
+        reactions: Reaction[];
+    }
+}
+
 // Shared types
 export type DMWebSocketMessage = DMNewWebSocketMessage | DMEditedWebSocketMessage | DMDeletedWebSocketMessage
-export type ChatWebSocketMessage = MessageEditedWebSocketMessage | MessageDeletedWebSocketMessage | NewMessageWebSocketMessage
+export type ChatWebSocketMessage = MessageEditedWebSocketMessage | MessageDeletedWebSocketMessage | NewMessageWebSocketMessage | ReactionUpdateWebSocketMessage
 
 // -----------
 // Encrypted message JSON (plaintext structure before encryption)

frontend/src/pages/app/resources/css/_chat.scss

@@ -213,7 +213,7 @@
                             height: 32px;
                             flex-shrink: 0;
                             margin-bottom: 4px;
-                            margin: 8px;
+                            margin: 10px;
     
                             img {
                                 width: 100%;
@@ -234,7 +234,7 @@
                             margin-bottom: 0.3rem;
                             font-size: 0.9rem;
                             transition: color 0.2s ease;
-                            margin: 8px;
+                            margin: 10px;
         
                             &:hover {
                                 color: $color-dark-primary;

frontend/src/pages/app/resources/css/_reactions.scss

@@ -0,0 +1,324 @@
+@use "common/material" as *;
+@use "sass:color";
+
+// Reaction styles
+.message-reactions {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 4px;
+    margin-top: 8px;
+    margin-left: 10px;
+    margin-right: 10px;
+}
+
+.reaction-button {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    padding: 8px 12px;
+    border: none;
+    border-radius: 16px;
+    background-color: $color-dark-surface-container;
+    cursor: pointer;
+    transition: transform 0.2s ease, background-color 0.2s ease;
+    font-size: 1px;
+    min-height: 28px;
+    animation: reactionFadeIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
+    
+    &.removing {
+        animation: reactionFadeOut 0.2s ease forwards;
+    }
+    
+    &:hover {
+        background-color: $color-dark-surface-container-high;
+        transform: scale(1.05);
+    }
+    
+    &.reacted {
+        background-color: $color-dark-primary-container;
+        border-color: $color-dark-primary;
+        color: $color-dark-on-primary-container;
+        
+        &:hover {
+            background-color: color.adjust($color-dark-primary-container, $lightness: 20%);
+        }
+    }
+}
+
+.reaction-emoji {
+    font-size: 17px;
+    line-height: 1;
+}
+
+.reaction-count {
+    font-size: 12px;
+    font-weight: 500;
+    line-height: 1;
+}
+
+// Reaction bar styles (standalone)
+.reaction-bar {
+    background: $color-dark-surface-container;
+    border: 1px solid $color-dark-outline;
+    border-radius: 24px;
+    padding: 8px;
+    opacity: 1;
+    transition: all 0.15s ease;
+    backdrop-filter: blur(8px);
+    transform: translateY(0);
+    
+    &.closing {
+        opacity: 0;
+        transform: scale(0.8);
+    }
+}
+
+// Context menu wrapper with animations
+.context-menu-wrapper {
+    position: relative;
+    display: block;
+    
+    // Animation states
+    &.entering {
+        opacity: 0;
+        transform: scale(0.8);
+        animation: contextMenuEnter 0.2s ease forwards;
+    }
+    
+    &.entering-left {
+        opacity: 0;
+        transform: translateX(-20px) scale(0.8);
+        animation: contextMenuEnterLeft 0.2s ease forwards;
+    }
+    
+    &.entering-up {
+        opacity: 0;
+        transform: translateY(20px) scale(0.8);
+        animation: contextMenuEnterUp 0.2s ease forwards;
+    }
+    
+    &.entering-up-left {
+        opacity: 0;
+        transform: translateX(-20px) translateY(20px) scale(0.8);
+        animation: contextMenuEnterUpLeft 0.2s ease forwards;
+    }
+    
+    &.closing {
+        opacity: 1;
+        transform: scale(1);
+        animation: contextMenuClose 0.2s ease forwards;
+    }
+    
+    &.closing-left {
+        opacity: 1;
+        transform: translateX(0) scale(1);
+        animation: contextMenuCloseLeft 0.2s ease forwards;
+    }
+    
+    &.closing-up {
+        opacity: 1;
+        transform: translateY(0) scale(1);
+        animation: contextMenuCloseUp 0.2s ease forwards;
+    }
+    
+    &.closing-up-left {
+        opacity: 1;
+        transform: translateX(0) translateY(0) scale(1);
+        animation: contextMenuCloseUpLeft 0.2s ease forwards;
+    }
+}
+
+// Reaction bar inside context menu wrapper
+.context-menu-reaction-bar {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    padding: 8px 12px;
+    background: $color-dark-surface-container;
+    border: 1px solid $color-dark-outline;
+    border-radius: 16px;
+    position: absolute;
+    bottom: 100%;
+    min-width: 200px;
+    justify-content: center;
+    margin-bottom: 10px;
+    
+    &.left {
+        left: 0;
+        transform: translateX(0);
+    }
+    
+    &.right {
+        right: 0;
+        transform: translateX(0);
+    }
+}
+
+.reaction-bar-content {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+}
+
+.reaction-emoji-button {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 32px;
+    height: 32px;
+    border: none;
+    border-radius: 16px;
+    background: transparent;
+    cursor: pointer;
+    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
+    font-size: 18px;
+    
+    &:hover {
+        background: var(--mdui-color-surface-container-high);
+        transform: scale(1.3);
+        box-shadow: var(--mdui-elevation-1);
+    }
+    
+    &:active {
+        transform: scale(0.95);
+        transition: transform 0.1s ease;
+    }
+}
+
+.reaction-expand-button {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 32px;
+    height: 32px;
+    border: 1px solid var(--mdui-color-outline);
+    border-radius: 16px;
+    background: var(--mdui-color-surface);
+    cursor: pointer;
+    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
+    
+    &:hover {
+        background: var(--mdui-color-surface-container-high);
+        border-color: var(--mdui-color-primary);
+        transform: scale(1.1);
+        box-shadow: var(--mdui-elevation-1);
+    }
+    
+    &:active {
+        transform: scale(0.95);
+        transition: transform 0.1s ease;
+    }
+    
+    .material-symbols {
+        font-size: 18px;
+        color: var(--mdui-color-on-surface);
+        transition: transform 0.2s ease;
+    }
+    
+    &:hover .material-symbols {
+        transform: rotate(90deg);
+    }
+}
+
+// Animation for reactions appearing/disappearing
+@keyframes reactionFadeIn {
+    from {
+        opacity: 0;
+        transform: scale(0.8);
+    }
+
+    to {
+        opacity: 1;
+        transform: scale(1);
+    }
+}
+
+@keyframes reactionFadeOut {
+    from {
+        opacity: 1;
+        transform: scale(1);
+    }
+
+    to {
+        opacity: 0;
+        transform: scale(0.8);
+    }
+}
+
+// Context menu wrapper animations
+@keyframes contextMenuEnter {
+    to {
+        opacity: 1;
+        transform: scale(1);
+    }
+}
+
+@keyframes contextMenuEnterLeft {
+    to {
+        opacity: 1;
+        transform: translateX(0) scale(1);
+    }
+}
+
+@keyframes contextMenuEnterUp {
+    to {
+        opacity: 1;
+        transform: translateY(0) scale(1);
+    }
+}
+
+@keyframes contextMenuEnterUpLeft {
+    to {
+        opacity: 1;
+        transform: translateX(0) translateY(0) scale(1);
+    }
+}
+
+@keyframes contextMenuClose {
+    to {
+        opacity: 0;
+        transform: scale(0.8);
+    }
+}
+
+@keyframes contextMenuCloseLeft {
+    to {
+        opacity: 0;
+        transform: translateX(-20px) scale(0.8);
+    }
+}
+
+@keyframes contextMenuCloseUp {
+    to {
+        opacity: 0;
+        transform: translateY(20px) scale(0.8);
+    }
+}
+
+@keyframes contextMenuCloseUpLeft {
+    to {
+        opacity: 0;
+        transform: translateX(-20px) translateY(20px) scale(0.8);
+    }
+}
+
+// Mobile responsive
+@media (max-width: 768px) {
+    .reaction-bar {
+        padding: 6px;
+    }
+    
+    .reaction-emoji-button,
+    .reaction-expand-button {
+        width: 28px;
+        height: 28px;
+    }
+    
+    .reaction-emoji-button {
+        font-size: 16px;
+    }
+    
+    .reaction-expand-button .material-symbols {
+        font-size: 16px;
+    }
+}

frontend/src/pages/app/resources/css/common/_components.scss

@@ -31,13 +31,13 @@ button, input {
 }
 
 .context-menu {
-    position: fixed;
+    position: relative;
     background-color: $color-dark-surface-container;
     border-radius: 8px;
     box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
     padding: 0.5rem 0;
     z-index: 1000;
-    display: none;
+    display: block;
     min-width: 150px;
     max-width: 200px;
     white-space: nowrap;

frontend/src/pages/app/resources/css/style.scss

@@ -12,6 +12,7 @@
 @use "download-app";
 @use "404" as not-found;
 @use "homepage";
+@use "reactions";
 
 @use "lib/fonts/montserrat";
 @use "lib/fonts/material-symbols";

frontend/src/pages/app/ui/components/chat/ChatMessages.tsx

@@ -4,10 +4,13 @@ import type { Message as MessageType } from "../../../core/types";
 import type { UserProfile } from "../../../core/types";
 import { UserProfileDialog } from "./UserProfileDialog";
 import { MessageContextMenu, type ContextMenuState } from "./MessageContextMenu";
+import { EmojiMenu } from "./EmojiMenu";
 import { fetchUserProfile } from "../../../api/profileApi";
 import { useEffect, useState, type ReactNode } from "react";
 import { delay } from "../../../utils/utils";
 import { MaterialDialog } from "../core/Dialog";
+import { request } from "../../../core/websocket";
+import type { AddReactionRequest } from "../../../core/types";
 
 interface ChatMessagesProps {
     messages?: MessageType[];
@@ -39,6 +42,17 @@ export function ChatMessages({ messages = [], children, isDm = false, onReplySel
     const [deleteDialogOpen, setDeleteDialogOpen] = useState(false);
     const [toBeDeleted, setToBeDeleted] = useState<{ id: number; isDm: boolean } | null>(null);
 
+    // Emoji menu state (for expanded emoji picker)
+    const [emojiMenu, setEmojiMenu] = useState<{
+        isOpen: boolean;
+        message: MessageType | null;
+        position: { x: number; y: number };
+    }>({
+        isOpen: false,
+        message: null,
+        position: { x: 0, y: 0 }
+    });
+
     useEffect(() => {
         if (!deleteDialogOpen) {
             setToBeDeleted(null);
@@ -107,6 +121,46 @@ export function ChatMessages({ messages = [], children, isDm = false, onReplySel
         }
     }
 
+    async function handleReactionClick(messageId: number, emoji: string) {
+        if (!user.authToken) return;
+        
+        try {
+            await request<AddReactionRequest["data"], any>({
+                type: "addReaction",
+                credentials: { scheme: "Bearer", credentials: user.authToken },
+                data: {
+                    message_id: messageId,
+                    emoji: emoji
+                }
+            });
+        } catch (error) {
+            console.error("Failed to add reaction:", error);
+        }
+    }
+
+
+    function handleEmojiMenuClose() {
+        setEmojiMenu(prev => ({ ...prev, isOpen: false }));
+    }
+
+    function handleExpandEmojiMenu(message: MessageType) {
+        const messageElement = document.querySelector(`[data-id="${message.id}"]`);
+        if (messageElement) {
+            const rect = messageElement.getBoundingClientRect();
+            setEmojiMenu({
+                isOpen: true,
+                message,
+                position: { x: rect.left + rect.width / 2, y: rect.bottom + 10 }
+            });
+        }
+    }
+
+    function handleEmojiSelect(emoji: string) {
+        if (emojiMenu.message) {
+            handleReactionClick(emojiMenu.message.id, emoji);
+        }
+    }
+
     return (
         <>
             <div className="chat-messages" id="chat-messages">
@@ -117,6 +171,7 @@ export function ChatMessages({ messages = [], children, isDm = false, onReplySel
                         isAuthor={message.username === user.currentUser?.username}
                         onProfileClick={handleProfileClick}
                         onContextMenu={handleContextMenu}
+                        onReactionClick={handleReactionClick}
                         isLoadingProfile={isLoadingProfile}
                         isDm={isDm}
                         dmRecipientPublicKey={dmRecipientPublicKey} />
@@ -153,11 +208,22 @@ export function ChatMessages({ messages = [], children, isDm = false, onReplySel
                     onReply={handleReply}
                     onDelete={handleDelete}
                     onRetry={handleRetry}
+                    onReactionClick={handleReactionClick}
+                    onExpandEmojiMenu={handleExpandEmojiMenu}
                     position={contextMenu.position}
                     isOpen={contextMenu.isOpen}
                     onOpenChange={handleContextMenuOpenChange}
                 />
             )}
+
+
+            {/* Emoji Menu */}
+            <EmojiMenu
+                isOpen={emojiMenu.isOpen}
+                onClose={handleEmojiMenuClose}
+                onEmojiSelect={handleEmojiSelect}
+                position={emojiMenu.position}
+            />
         </>
     );
 }

frontend/src/pages/app/ui/components/chat/Message.tsx

@@ -13,12 +13,14 @@ import { useAppState } from "../../state";
 import { ub64 } from "../../../utils/utils";
 import { useImmer } from "use-immer";
 import { createPortal } from "react-dom";
+import { MessageReactions } from "./MessageReactions";
 
 interface MessageProps {
     message: MessageType;
     isAuthor: boolean;
     onProfileClick: (username: string) => void;
     onContextMenu: (e: React.MouseEvent, message: MessageType) => void;
+    onReactionClick?: (messageId: number, emoji: string) => void;
     isLoadingProfile?: boolean;
     isDm?: boolean;
     dmRecipientPublicKey?: string;
@@ -31,7 +33,7 @@ interface Rect {
     height: number
 }
 
-export function Message({ message, isAuthor, onProfileClick, onContextMenu, isLoadingProfile = false, isDm = false, dmRecipientPublicKey }: MessageProps) {
+export function Message({ message, isAuthor, onProfileClick, onContextMenu, onReactionClick, isLoadingProfile = false, isDm = false, dmRecipientPublicKey }: MessageProps) {
     const [formattedMessage, setFormattedMessage] = useState({ __html: "" });
     const [decryptedFiles, updateDecryptedFiles] = useImmer<Map<string, string>>(new Map());
     const [loadedImages, updateLoadedImages] = useImmer<Set<string>>(new Set());
@@ -373,6 +375,12 @@ export function Message({ message, isAuthor, onProfileClick, onContextMenu, isLo
                         </mdui-list>
                     )}
 
+                    <MessageReactions 
+                        reactions={message.reactions}
+                        onReactionClick={(emoji) => onReactionClick?.(message.id, emoji)}
+                        messageId={message.id}
+                    />
+
                     <div className="message-time">
                         {formatTime(message.timestamp)}
                         {message.is_edited ? " (edited)" : undefined}

frontend/src/pages/app/ui/components/chat/MessageContextMenu.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect } from "react";
+import { useState, useEffect, useRef } from "react";
 import type { Message, Size2D } from "../../../core/types";
 
 interface MessageContextMenuProps {
@@ -8,6 +8,8 @@ interface MessageContextMenuProps {
     onReply: (message: Message) => void;
     onDelete: (message: Message) => void;
     onRetry?: (message: Message) => void;
+    onReactionClick?: (messageId: number, emoji: string) => Promise<void>;
+    onExpandEmojiMenu?: (message: Message) => void;
     position: Size2D;
     isOpen: boolean;
     onOpenChange: (isOpen: boolean) => void;
@@ -26,6 +28,8 @@ export function MessageContextMenu({
     onReply, 
     onDelete, 
     onRetry,
+    onReactionClick,
+    onExpandEmojiMenu,
     position,
     isOpen,
     onOpenChange
@@ -34,64 +38,86 @@ export function MessageContextMenu({
     const [isClosing, setIsClosing] = useState(false);
     const [calculatedPosition, setCalculatedPosition] = useState(position);
     const [animationClass, setAnimationClass] = useState('entering');
+    const [reactionBarPosition, setReactionBarPosition] = useState<'left' | 'right'>('left');
+    
+    // Refs for measuring actual dimensions
+    const wrapperRef = useRef<HTMLDivElement>(null);
+    const reactionBarRef = useRef<HTMLDivElement>(null);
+    const contextMenuRef = useRef<HTMLDivElement>(null);
 
     // Calculate smart positioning when component opens
     useEffect(() => {
         if (isOpen) {
-            const menuWidth = 160; // min-width from CSS
+            // Use a small delay to ensure elements are rendered before measuring
-            const menuHeight = isAuthor ? 120 : 60; // Approximate height based on items
+            const frameId = requestAnimationFrame(() => {
-            const padding = 10; // Padding from viewport edges
+                if (wrapperRef.current && reactionBarRef.current && contextMenuRef.current) {
+                    // Get actual dimensions from DOM elements
+                    const reactionBarRect = reactionBarRef.current.getBoundingClientRect();
+                    const contextMenuRect = contextMenuRef.current.getBoundingClientRect();
 
                     const viewportWidth = window.innerWidth;
                     const viewportHeight = window.innerHeight;
 
+                    // Calculate shared/combined rect dimensions
+                    const sharedRect = {
+                        width: Math.max(reactionBarRect.width, contextMenuRect.width),
+                        height: reactionBarRect.height + contextMenuRect.height
+                    };
+
                     let x = position.x;
                     let y = position.y;
                     let animation = 'entering';
+                    let reactionPosition: 'left' | 'right' = 'left';
 
-            // Check if menu would overflow right edge
+                    // Check if shared rect would overflow and adjust position
-            if (x + menuWidth + padding > viewportWidth) {
+                    if (x + sharedRect.width > viewportWidth) {
-                x = viewportWidth - menuWidth - padding;
+                        x = position.x - contextMenuRect.width - 25;
-                animation = 'entering-left'; // Animation from left side
+                        animation = 'entering-left';
+                        reactionPosition = 'right';
+                    } else {
+                        reactionPosition = 'left';
                     }
 
-            // Check if menu would overflow bottom edge
+                    // Ensure menu doesn't go off the left edge
-            if (y + menuHeight + padding > viewportHeight) {
+                    if (x < 0) {
-                y = viewportHeight - menuHeight - padding;
+                        x = 0;
-                animation = 'entering-up'; // Animation from bottom
                     }
 
-            // If both edges would overflow, use top-left positioning
+                    // Check if shared rect would overflow bottom edge
-            if (x + menuWidth + padding > viewportWidth && y + menuHeight + padding > viewportHeight) {
+                    if (y + sharedRect.height > viewportHeight) {
-                x = Math.max(padding, position.x - menuWidth);
+                        y = viewportHeight - sharedRect.height;
-                y = Math.max(padding, position.y - menuHeight);
+                        animation = 'entering-up';
-                animation = 'entering-up-left';
                     }
                     
                     setCalculatedPosition({ x, y });
                     setAnimationClass(animation);
+                    setReactionBarPosition(reactionPosition);
+                }
+            });
+            
+            return () => cancelAnimationFrame(frameId);
         }
     }, [isOpen, position, isAuthor]);
 
     // Effect to handle clicks outside the context menu
     useEffect(() => {
-        const handleClickOutside = (event: MouseEvent) => {
+        function handleClickOutside(event: MouseEvent) {
             if (isOpen && !isClosing) {
-                // Check if the click is on a context menu element
+                // Check if the click is on a context menu element or reaction bar
                 const target = event.target as Element;
-                if (!target.closest('.context-menu')) {
+                if (!target.closest('.context-menu') && !target.closest('.context-menu-reaction-bar')) {
                     handleClose();
                 }
             }
         };
 
-        const handleKeyDown = (event: KeyboardEvent) => {
+        function handleKeyDown(event: KeyboardEvent) {
             if (event.key === 'Escape' && isOpen && !isClosing) {
                 handleClose();
             }
         };
 
-        const handleWindowBlur = () => {
+        function handleWindowBlur() {
             // Close context menu when browser window loses focus
             if (isOpen && !isClosing) {
                 handleClose();
@@ -123,6 +149,7 @@ export function MessageContextMenu({
             setIsClosing(false);
             setAnimationClass('entering'); // Reset for next opening
         }, 200); // Match the animation duration from _animations.scss
+        // TODO no hardcoded delays
     }
 
     interface Action {
@@ -178,17 +205,62 @@ export function MessageContextMenu({
         },
     ];
 
+    // Quick reactions for the reaction bar
+    const QUICK_REACTIONS = ["👍", "❤️", "😂", "😮", "😢", "😡"];
+
+    async function handleReactionClick(emoji: string) {
+        if (onReactionClick) {
+            await onReactionClick(message.id, emoji);
+        }
+        handleClose();
+    }
+
+    function handleExpandClick() {
+        if (onExpandEmojiMenu) {
+            onExpandEmojiMenu(message);
+        }
+        handleClose();
+    }
+
     return isOpen && (
         <div 
-            className={`context-menu ${animationClass}`}
+            ref={wrapperRef}
+            className={`context-menu-wrapper ${animationClass}`}
             style={{
                 position: "fixed",
-                display: "block",
                 top: calculatedPosition.y,
                 left: calculatedPosition.x,
                 zIndex: 1000
             }}
             onClick={(e) => e.stopPropagation()}>
+            
+            {/* Reaction Bar */}
+            <div 
+                ref={reactionBarRef}
+                className={`context-menu-reaction-bar ${reactionBarPosition}`}>
+                {QUICK_REACTIONS.map((emoji, index) => (
+                    <button
+                        key={index}
+                        className="reaction-emoji-button"
+                        onClick={async () => await handleReactionClick(emoji)}
+                        title={emoji}
+                    >
+                        {emoji}
+                    </button>
+                ))}
+                <button
+                    className="reaction-expand-button"
+                    onClick={handleExpandClick}
+                    title="More emojis"
+                >
+                    <span className="material-symbols">add</span>
+                </button>
+            </div>
+
+            {/* Context Menu */}
+            <div 
+                ref={contextMenuRef}
+                className="context-menu">
                 {actions.map((action, i) => (
                     action.show && (
                         <div 
@@ -202,5 +274,6 @@ export function MessageContextMenu({
                     )
                 ))}
             </div>
+        </div>
     )
 }

frontend/src/pages/app/ui/components/chat/MessageReactions.tsx

@@ -0,0 +1,108 @@
+import { useAppState } from "../../state";
+import { useState, useEffect } from "react";
+import type { Reaction } from "../../../core/types";
+
+interface MessageReactionsProps {
+    reactions?: Reaction[];
+    onReactionClick: (emoji: string) => void;
+    messageId?: number; // Add messageId to ensure unique keys
+}
+
+export function MessageReactions({ reactions, onReactionClick, messageId }: MessageReactionsProps) {
+    const { user } = useAppState();
+    const [visibleReactions, setVisibleReactions] = useState<Reaction[]>([]);
+    const [animatingReactions, setAnimatingReactions] = useState<Set<string>>(new Set());
+
+    // Handle reactions with animation
+    useEffect(() => {
+        if (!reactions || reactions.length === 0) {
+            // Animate out all visible reactions
+            visibleReactions.forEach(reaction => {
+                setAnimatingReactions(prev => new Set(prev).add(reaction.emoji));
+                setTimeout(() => {
+                    setVisibleReactions([]);
+                    setAnimatingReactions(new Set());
+                }, 200);
+            });
+            return;
+        }
+
+        // Deduplicate reactions by emoji (safety measure)
+        const uniqueReactions = reactions.reduce((acc, reaction) => {
+            const existing = acc.find(r => r.emoji === reaction.emoji);
+            if (existing) {
+                // Keep the one with the higher count
+                if (reaction.count > existing.count) {
+                    acc[acc.indexOf(existing)] = reaction;
+                }
+            } else {
+                acc.push(reaction);
+            }
+            return acc;
+        }, [] as Reaction[]);
+
+
+        // Animate out removed reactions
+        visibleReactions.forEach(reaction => {
+            if (!uniqueReactions.some(r => r.emoji === reaction.emoji)) {
+                setAnimatingReactions(prev => new Set(prev).add(reaction.emoji));
+                setTimeout(() => {
+                    setVisibleReactions(prev => prev.filter(r => r.emoji !== reaction.emoji));
+                    setAnimatingReactions(prev => {
+                        const newSet = new Set(prev);
+                        newSet.delete(reaction.emoji);
+                        return newSet;
+                    });
+                }, 200);
+            }
+        });
+
+        // Update existing reactions and add new ones
+        setVisibleReactions(prev => {
+            const updated = [...prev];
+            
+            // Update existing reactions
+            uniqueReactions.forEach(reaction => {
+                const existingIndex = updated.findIndex(r => r.emoji === reaction.emoji);
+                if (existingIndex !== -1) {
+                    updated[existingIndex] = reaction;
+                } else {
+                    // Add new reaction only if it doesn't already exist
+                    if (!updated.some(r => r.emoji === reaction.emoji)) {
+                        updated.push(reaction);
+                    }
+                }
+            });
+            
+            return updated;
+        });
+    }, [reactions]);
+
+    if (!reactions || reactions.length === 0) {
+        return null;
+    }
+
+    return (
+        <div className="message-reactions">
+            {visibleReactions.map((reaction, index) => {
+                const hasUserReacted = reaction.users.some(u => u.id === user.currentUser?.id);
+                const isAnimating = animatingReactions.has(reaction.emoji);
+                
+                // Create a unique key that includes messageId, emoji, count, and index to prevent duplicates
+                const uniqueKey = `${messageId || 'unknown'}-${reaction.emoji}-${reaction.count}-${index}`;
+                
+                return (
+                    <button
+                        key={uniqueKey}
+                        className={`reaction-button ${hasUserReacted ? "reacted" : ""} ${isAnimating ? "removing" : ""}`}
+                        onClick={() => onReactionClick(reaction.emoji)}
+                        title={reaction.users.map(u => u.username).join(", ")}
+                    >
+                        <span className="reaction-emoji">{reaction.emoji}</span>
+                        <span className="reaction-count">{reaction.count}</span>
+                    </button>
+                );
+            })}
+        </div>
+    );
+}

frontend/src/pages/app/ui/components/chat/ReactionBar.tsx

@@ -0,0 +1,100 @@
+import { useState, useEffect } from "react";
+import type { Size2D } from "../../../core/types";
+
+interface ReactionBarProps {
+    isOpen: boolean;
+    onClose: () => void;
+    onEmojiSelect: (emoji: string) => void;
+    onExpandClick: () => void;
+    position: Size2D;
+}
+
+// Most common emojis for quick reactions
+const QUICK_REACTIONS = ["👍", "❤️", "😂", "😮", "😢", "😡"];
+
+export function ReactionBar({ isOpen, onClose, onEmojiSelect, onExpandClick, position }: ReactionBarProps) {
+    const [isClosing, setIsClosing] = useState(false);
+    const [calculatedPosition, setCalculatedPosition] = useState(position);
+
+    function handleEmojiClick(emoji: string) {
+        onEmojiSelect(emoji);
+        handleClose();
+    }
+
+    // Smart positioning logic to avoid screen edge clipping
+    useEffect(() => {
+        if (isOpen) {
+            const barWidth = 240; // Approximate width of reaction bar (6 emojis + expand button)
+            const barHeight = 48; // Approximate height
+            const padding = 10; // Padding from viewport edges
+            
+            const viewportWidth = window.innerWidth;
+            
+            let x = position.x;
+            let y = position.y - barHeight - 20; // 20px above the position
+            
+            // Check if bar would overflow right edge
+            if (x + barWidth + padding > viewportWidth) {
+                x = viewportWidth - barWidth - padding;
+            }
+            
+            // Check if bar would overflow left edge
+            if (x < padding) {
+                x = padding;
+            }
+            
+            // Check if bar would overflow top edge
+            if (y < padding) {
+                y = position.y + 40; // Position below instead of above
+            }
+            
+            setCalculatedPosition({ x, y });
+        }
+    }, [isOpen, position]);
+
+    function handleClose() {
+        setIsClosing(true);
+        setTimeout(() => {
+            onClose();
+            setIsClosing(false);
+        }, 150);
+    }
+
+    if (!isOpen) return null;
+
+    return (
+        <div 
+            className={`reaction-bar ${isClosing ? "closing" : ""}`}
+            style={{
+                position: "fixed",
+                left: calculatedPosition.x,
+                top: calculatedPosition.y,
+                zIndex: 1001 // Higher than context menu to appear above it
+            }}
+            onClick={(e) => e.stopPropagation()}
+        >
+            <div className="reaction-bar-content">
+                {QUICK_REACTIONS.map((emoji, index) => (
+                    <button
+                        key={index}
+                        className="reaction-emoji-button"
+                        onClick={() => handleEmojiClick(emoji)}
+                        title={emoji}
+                    >
+                        {emoji}
+                    </button>
+                ))}
+                <button
+                    className="reaction-expand-button"
+                    onClick={() => {
+                        handleClose();
+                        onExpandClick();
+                    }}
+                    title="More emojis"
+                >
+                    <span className="material-symbols">add</span>
+                </button>
+            </div>
+        </div>
+    );
+}

frontend/src/pages/app/ui/panels/MessagePanel.ts

@@ -86,6 +86,14 @@ export abstract class MessagePanel {
         });
     }
 
+    protected updateMessageReactions(messageId: number, reactions: any[]): void {
+        this.updateState({
+            messages: this.state.messages.map(msg => 
+                msg.id === messageId ? { ...msg, reactions } : msg
+            )
+        });
+    }
+
     protected clearMessages(): void {
         this.updateState({ messages: [] });
     }

frontend/src/pages/app/ui/panels/PublicChatPanel.ts

@@ -2,7 +2,7 @@ import { MessagePanel } from "./MessagePanel";
 import { API_BASE_URL } from "../../core/config";
 import { getAuthHeaders } from "../../auth/api";
 import { request } from "../../core/websocket";
-import type { ChatWebSocketMessage, Message, SendMessageRequest } from "../../core/types";
+import type { ChatWebSocketMessage, Message, SendMessageRequest, ReactionUpdateWebSocketMessage } from "../../core/types";
 import type { UserState } from "../state";
 
 export class PublicChatPanel extends MessagePanel {
@@ -104,7 +104,7 @@ export class PublicChatPanel extends MessagePanel {
     }
 
     // Handle incoming WebSocket messages
-    async handleWebSocketMessage(response: ChatWebSocketMessage): Promise<void> {
+    async handleWebSocketMessage(response: ChatWebSocketMessage | ReactionUpdateWebSocketMessage): Promise<void> {
         switch (response.type) {
             case 'messageEdited':
                 if (response.data) {
@@ -136,6 +136,11 @@ export class PublicChatPanel extends MessagePanel {
                     this.addMessage(newMsg);
                 }
                 break;
+            case 'reactionUpdate':
+                if (response.data) {
+                    this.updateMessageReactions(response.data.message_id, response.data.reactions);
+                }
+                break;
         }
     };