更新新增三个模块

backend/utils/db.py

@@ -0,0 +1,140 @@
+"""
+数据库连接与初始化
+"""
+import os
+import pymysql
+from werkzeug.security import generate_password_hash
+
+try:
+    from config import mysql_host, mysql_user, mysql_password, mysql_database
+except ImportError:
+    mysql_host = os.environ.get('MYSQL_HOST', 'localhost')
+    mysql_user = os.environ.get('MYSQL_USER', 'root')
+    mysql_password = os.environ.get('MYSQL_PASSWORD', '')
+    mysql_database = os.environ.get('MYSQL_DATABASE', 'maixiang_ai')
+
+
+def get_db():
+    return pymysql.connect(
+        host=mysql_host,
+        user=mysql_user,
+        password=mysql_password,
+        database=mysql_database,
+        charset='utf8mb4',
+        cursorclass=pymysql.cursors.DictCursor
+    )
+
+
+def _create_initial_admin():
+    """若没有任何管理员，则创建默认超级管理员（首次启动时，仅一个）"""
+    try:
+        conn = get_db()
+        with conn.cursor() as cur:
+            cur.execute("SELECT id FROM users WHERE role = 'super_admin' LIMIT 1")
+            if cur.fetchone():
+                conn.close()
+                return
+            admin_user = os.environ.get('ADMIN_USER', 'admin')
+            admin_pwd = os.environ.get('ADMIN_PASSWORD', 'admin123')
+            pwd_hash = generate_password_hash(admin_pwd, method='pbkdf2:sha256')
+            cur.execute(
+                "INSERT INTO users (username, password_hash, is_admin, role) VALUES (%s, %s, 1, 'super_admin')",
+                (admin_user, pwd_hash)
+            )
+        conn.commit()
+        conn.close()
+    except Exception:
+        pass
+
+
+def init_db():
+    """初始化数据库表，若不存在则创建"""
+    conn = pymysql.connect(
+        host=mysql_host,
+        user=mysql_user,
+        password=mysql_password,
+        charset='utf8mb4'
+    )
+    try:
+        with conn.cursor() as cur:
+            cur.execute(f"CREATE DATABASE IF NOT EXISTS `{mysql_database}` DEFAULT CHARSET utf8mb4")
+            cur.execute(f"USE `{mysql_database}`")
+            cur.execute("""
+                CREATE TABLE IF NOT EXISTS users (
+                    id INT AUTO_INCREMENT PRIMARY KEY,
+                    username VARCHAR(64) NOT NULL UNIQUE,
+                    password_hash VARCHAR(256) NOT NULL,
+                    is_admin TINYINT(1) DEFAULT 0,
+                    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+                )
+            """)
+            cur.execute("""
+                CREATE TABLE IF NOT EXISTS image_history (
+                    id INT AUTO_INCREMENT PRIMARY KEY,
+                    user_id INT NOT NULL,
+                    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+                    panel_type VARCHAR(64) DEFAULT '',
+                    original_urls JSON,
+                    params JSON,
+                    result_urls JSON,
+                    long_image_url VARCHAR(1024) DEFAULT NULL,
+                    INDEX idx_user_created (user_id, created_at DESC)
+                )
+            """)
+            try:
+                cur.execute("ALTER TABLE image_history ADD COLUMN long_image_url VARCHAR(1024) DEFAULT NULL")
+            except Exception:
+                pass
+            try:
+                cur.execute("ALTER TABLE users ADD COLUMN machine VARCHAR(64) DEFAULT NULL")
+            except Exception:
+                pass
+            try:
+                cur.execute("ALTER TABLE users ADD COLUMN role VARCHAR(20) DEFAULT 'normal'")
+            except Exception:
+                pass
+            try:
+                cur.execute("ALTER TABLE users ADD COLUMN created_by_id INT NULL")
+            except Exception:
+                pass
+            cur.execute("""
+                CREATE TABLE IF NOT EXISTS web_config (
+                    id INT AUTO_INCREMENT PRIMARY KEY,
+                    version VARCHAR(64) NOT NULL,
+                    file_url VARCHAR(1024) NOT NULL,
+                    created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+                )
+            """)
+            cur.execute("""
+                CREATE TABLE IF NOT EXISTS columns (
+                    id INT AUTO_INCREMENT PRIMARY KEY,
+                    name VARCHAR(128) NOT NULL COMMENT '栏目名',
+                    column_key VARCHAR(64) NOT NULL COMMENT '栏目标识',
+                    created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+                    UNIQUE KEY uk_column_key (column_key)
+                )
+            """)
+            cur.execute("""
+                CREATE TABLE IF NOT EXISTS user_column_permission (
+                    user_id INT NOT NULL,
+                    column_id INT NOT NULL,
+                    PRIMARY KEY (user_id, column_id),
+                    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
+                    FOREIGN KEY (column_id) REFERENCES columns(id) ON DELETE CASCADE
+                )
+            """)
+            try:
+                cur.execute("UPDATE users SET role = 'normal' WHERE (role IS NULL OR role = '') AND (is_admin = 0 OR is_admin IS NULL)")
+                cur.execute("SELECT MIN(id) AS mid FROM users WHERE is_admin = 1")
+                row = cur.fetchone()
+                if row and row.get('mid'):
+                    mid = row['mid']
+                    cur.execute("UPDATE users SET role = 'super_admin' WHERE id = %s", (mid,))
+                    cur.execute("UPDATE users SET role = 'admin' WHERE is_admin = 1 AND id != %s", (mid,))
+                    cur.execute("UPDATE users SET created_by_id = %s WHERE role = 'admin' AND (created_by_id IS NULL)", (mid,))
+            except Exception:
+                pass
+        conn.commit()
+    finally:
+        conn.close()
+    _create_initial_admin()