2025 SSF Public

Backend/utils/queries/friendship.py

@@ -0,0 +1,89 @@
+class FriendshipQueries:
+    """친구 관계 관련 쿼리"""
+
+    CREATE_TABLE = """
+        CREATE TABLE IF NOT EXISTS friendships (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            user_id INTEGER NOT NULL,
+            friend_id INTEGER NOT NULL,
+            status TEXT NOT NULL DEFAULT 'pending',
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (user_id) REFERENCES users (id) ON DELETE CASCADE,
+            FOREIGN KEY (friend_id) REFERENCES users (id) ON DELETE CASCADE,
+            UNIQUE(user_id, friend_id)
+        )
+    """
+
+    SELECT_USER_BY_USERNAME = """
+        SELECT id FROM users WHERE username = ?
+    """
+
+    SELECT_EXISTING_FRIENDSHIP = """
+        SELECT * FROM friendships 
+        WHERE (user_id = ? AND friend_id = ?) OR (user_id = ? AND friend_id = ?)
+    """
+
+    INSERT_FRIENDSHIP = """
+        INSERT INTO friendships (user_id, friend_id, status, created_at)
+        VALUES (?, ?, ?, ?)
+    """
+
+    SELECT_FRIENDSHIP_BY_IDS = """
+        SELECT * FROM friendships WHERE user_id = ? AND friend_id = ?
+    """
+
+    SELECT_FRIENDSHIP_FOR_ACCEPT = """
+        SELECT f.*, u.username 
+        FROM friendships f
+        JOIN users u ON f.user_id = u.id
+        WHERE f.id = ? AND f.friend_id = ? AND f.status = ?
+    """
+
+    UPDATE_FRIENDSHIP_STATUS = """
+        UPDATE friendships SET status = ? WHERE id = ?
+    """
+
+    SELECT_USER_FRIENDSHIPS = """
+        SELECT f.*, u.username 
+        FROM friendships f
+        JOIN users u ON (
+            CASE 
+                WHEN f.user_id = ? THEN f.friend_id = u.id
+                ELSE f.user_id = u.id
+            END
+        )
+        WHERE (f.user_id = ? OR f.friend_id = ?) AND f.status = ?
+        ORDER BY f.created_at DESC
+    """
+
+    SELECT_USER_FRIENDSHIPS_BY_STATUS = """
+        SELECT f.*, u.username 
+        FROM friendships f
+        JOIN users u ON (
+            CASE 
+                WHEN f.user_id = ? THEN f.friend_id = u.id
+                ELSE f.user_id = u.id
+            END
+        )
+        WHERE (f.user_id = ? OR f.friend_id = ?) AND f.status = ?
+        ORDER BY f.created_at DESC
+    """
+
+    DELETE_FRIENDSHIP = """
+        DELETE FROM friendships 
+        WHERE id = ? AND (user_id = ? OR friend_id = ?)
+    """
+
+    SELECT_PENDING_REQUESTS = """
+        SELECT f.*, u.username 
+        FROM friendships f
+        JOIN users u ON f.user_id = u.id
+        WHERE f.friend_id = ? AND f.status = ?
+        ORDER BY f.created_at DESC
+    """
+
+    CHECK_FRIENDSHIP_STATUS = """
+        SELECT * FROM friendships 
+        WHERE ((user_id = ? AND friend_id = ?) OR (user_id = ? AND friend_id = ?))
+        AND status = 'accepted'
+    """