First Commit

docs/02_database.md

@@ -0,0 +1,70 @@
+# Base de Dados — Firestore
+
+## 🔐 Users
+
+users/
+  userId/
+    email: string
+    username: string
+    themeMode: "system" | "light" | "dark"
+    primaryColor: string (hex)
+    language: "pt" | "en"
+    favoriteGenres: [string]
+    createdAt: timestamp
+
+---
+
+## 🎵 Songs
+
+songs/
+  songId/
+    title: string
+    artist: string
+    url: string
+    coverUrl: string
+    userId: string
+    genre: string
+    mood: string
+    duration: number
+    createdAt: timestamp
+
+---
+
+## 📂 Playlists
+
+playlists/
+  playlistId/
+    name: string
+    userId: string
+    songs: [songId]
+    createdAt: timestamp
+
+---
+
+## 💬 Chats
+
+chats/
+  chatId/
+    participants: [userId]
+    lastMessage: string
+    updatedAt: timestamp
+
+---
+
+## 📨 Messages
+
+messages/
+  messageId/
+    chatId: string
+    senderId: string
+    text: string (optional)
+    songId: string (optional)
+    timestamp: timestamp
+
+---
+
+## ⚡ Regras importantes
+
+- Nunca duplicar dados desnecessários
+- Usar IDs para relações
+- Otimizar leituras (Firestore billing)