init

db/db.go

@@ -0,0 +1,157 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+
+	_ "modernc.org/sqlite"
+	//_ "github.com/mattn/go-sqlite3"
+)
+
+// TemplateEntry 对应 templates 表
+type TemplateEntry struct {
+	Filename     string `json:"filename"`
+	TemplateType string `json:"template_type"`
+	Content      []byte `json:"content"`
+	CreatedAt    int64  `json:"created_at"`
+	UpdatedAt    int64  `json:"updated_at"`
+}
+
+// ParamsEntry 对应 config_params 表
+type ParamsEntry struct {
+	Filename     string `json:"filename"`
+	TemplateType string `json:"template_type"`
+	ParamsGOB    []byte `json:"params_gob"`
+	ParamsOrigin []byte `json:"params_origin"`
+	CreatedAt    int64  `json:"created_at"`
+	UpdatedAt    int64  `json:"updated_at"`
+}
+
+// RenderedConfigEntry 对应 rendered_configs 表
+type RenderedConfigEntry struct {
+	Filename        string `json:"filename"`
+	RenderedContent []byte `json:"rendered_content"`
+	RenderedAt      int64  `json:"rendered_at"`
+	UpdatedAt       int64  `json:"updated_at"`
+}
+
+// UsersTable
+type UsersTable struct {
+	UserName  string `json:"username"`
+	Password  string `json:"password"`
+	CreatedAt int64  `json:"created_at"`
+	UpdatedAt int64  `json:"updated_at"`
+}
+
+// ConfigDB
+type ConfigDB struct {
+	DB *sql.DB
+}
+
+func InitDB(filepath string) (*ConfigDB, error) {
+	db, err := loadDB(filepath)
+	if err != nil {
+		return nil, err
+	}
+	cdb := &ConfigDB{DB: db}
+	// 尝试 Ping 数据库以验证连接是否成功
+	if err = db.Ping(); err != nil {
+		db.Close() // 如果连接失败，确保关闭数据库句柄
+		return nil, fmt.Errorf("db: failed to connect to database: %w", err)
+	}
+	err = cdb.createTables()
+	if err != nil {
+		return nil, err
+	}
+	return cdb, nil
+}
+
+func loadDB(filepath string) (*sql.DB, error) {
+	db, err := sql.Open("sqlite", fmt.Sprintf("file:%s?cache=shared&_journal=WAL", filepath))
+	if err != nil {
+		log.Fatalf("Can not connect to database: %v", err)
+		return nil, err
+	}
+	return db, nil
+}
+
+func (cdb *ConfigDB) createTables() error {
+	tx, err := cdb.DB.Begin()
+	if err != nil {
+		return fmt.Errorf("failed to begin transaction for table creation: %w", err)
+	}
+	defer tx.Rollback() // 确保在出错时回滚事务
+
+	// 创建 templates 表
+	_, err = tx.Exec(`
+	CREATE TABLE IF NOT EXISTS templates (
+		filename        TEXT PRIMARY KEY,
+		template_type   TEXT NOT NULL,
+		content         BLOB NOT NULL,
+		created_at      INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+		updated_at      INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
+	);`)
+	if err != nil {
+		return fmt.Errorf("failed to create 'templates' table: %w", err)
+	}
+
+	// 2. 创建 config_params 表
+	_, err = tx.Exec(`
+	CREATE TABLE IF NOT EXISTS config_params (
+		filename        TEXT PRIMARY KEY,
+		template_type   TEXT NOT NULL,
+		params_gob      BLOB NOT NULL,
+		params_origin   BLOB NOT NULL,
+		created_at      INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+		updated_at      INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
+		-- FOREIGN KEY(filename) REFERENCES templates(filename) ON DELETE CASCADE -- 已移除
+	);`)
+	if err != nil {
+		return fmt.Errorf("failed to create 'config_params' table: %w", err)
+	}
+
+	// 3. 创建 rendered_configs 表 (外键指向 config_params 表)
+	_, err = tx.Exec(`
+	CREATE TABLE IF NOT EXISTS rendered_configs (
+		filename        TEXT PRIMARY KEY,
+		rendered_content BLOB NOT NULL,
+		rendered_at     INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+		updated_at      INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+		FOREIGN KEY(filename) REFERENCES config_params(filename) ON DELETE CASCADE -- 修改外键引用
+	);`)
+	if err != nil {
+		return fmt.Errorf("failed to create 'rendered_configs' table: %w", err)
+	}
+
+	//
+	// 4. 创建 users 表
+	_, err = tx.Exec(`
+	CREATE TABLE IF NOT EXISTS users (
+		username TEXT PRIMARY KEY,
+		password TEXT NOT NULL,
+		created_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+		updated_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
+	);`)
+	if err != nil {
+		return fmt.Errorf("failed to create 'users' table: %w", err)
+	}
+
+	// 提交事务
+	if err := tx.Commit(); err != nil {
+		return fmt.Errorf("failed to commit transaction for table creation: %w", err)
+	}
+
+	return nil
+}
+
+func (cdb *ConfigDB) CloseDB() error {
+	if cdb.DB == nil {
+		return nil // 数据库未打开或已关闭
+	}
+	err := cdb.DB.Close()
+	if err != nil {
+		return fmt.Errorf("db: failed to close database: %w", err)
+	}
+	return nil
+}

db/operation.go

@@ -0,0 +1,504 @@
+package db
+
+import (
+	"bytes"
+	"database/sql"
+	"encoding/gob"
+	"errors"
+	"fmt"
+	"strings"
+	"text/template"
+)
+
+// 用户校验操作
+/*
+	CREATE TABLE IF NOT EXISTS users (
+		username TEXT PRIMARY KEY,
+		password TEXT NOT NULL,
+		created_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+		updated_at INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
+	);`)
+*/
+
+// AddUser 向 'users' 表中添加一个新用户.
+func (cdb *ConfigDB) AddUser(username, password string) error {
+	insertSQL := `
+	INSERT INTO users (username, password)
+	VALUES (?, ?);
+	`
+	_, err := cdb.DB.Exec(insertSQL, username, password)
+	if err != nil {
+		return fmt.Errorf("db: failed to add user '%s': %w", username, err)
+	}
+	return nil
+}
+
+// GetUserByUsername 从 'users' 表中根据用户名获取用户信息.
+func (cdb *ConfigDB) GetUserByUsername(username string) (*UsersTable, error) {
+	querySQL := `SELECT username, password, created_at, updated_at FROM users WHERE username = ?;`
+	row := cdb.DB.QueryRow(querySQL, username)
+
+	user := &UsersTable{}
+	err := row.Scan(&user.UserName, &user.Password, &user.CreatedAt, &user.UpdatedAt)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, fmt.Errorf("db: user '%s' not found: %w", username, err)
+		}
+		return nil, fmt.Errorf("db: failed to get user '%s': %w", username, err)
+	}
+	return user, nil
+}
+
+// DeleteUser 从 'users' 表中删除一个用户.
+func (cdb *ConfigDB) DeleteUser(username string) error {
+	_, err := cdb.DB.Exec(`DELETE FROM users WHERE username = ?;`, username)
+	if err != nil {
+		return fmt.Errorf("db: failed to delete user '%s': %w", username, err)
+	}
+	return nil
+}
+
+// UpdateUserPassword 更新用户的密码.
+func (cdb *ConfigDB) UpdateUserPassword(username, newPassword string) error {
+	updateSQL := `
+	UPDATE users
+	SET password = ?, updated_at = strftime('%s', 'now')
+	WHERE username = ?;
+	`
+	result, err := cdb.DB.Exec(updateSQL, newPassword, username)
+	if err != nil {
+		return fmt.Errorf("db: failed to update user '%s' password: %w", username, err)
+	}
+	rowsAffected, err := result.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("db: failed to get rows affected by update: %w", err)
+	}
+	if rowsAffected == 0 {
+		return fmt.Errorf("db: no user with username '%s' found to update", username)
+	}
+	return nil
+}
+
+// RangeUserNames 获取所有用户的用户名.
+func (cdb *ConfigDB) RangeUserNames() ([]string, error) {
+	querySQL := `SELECT username FROM users;`
+	rows, err := cdb.DB.Query(querySQL)
+	if err != nil {
+		return nil, fmt.Errorf("db: failed to get usernames from users: %w", err)
+	}
+	defer rows.Close()
+
+	var usernames []string
+	for rows.Next() {
+		var username string
+		if err := rows.Scan(&username); err != nil {
+			return nil, fmt.Errorf("db: failed to scan username: %w", err)
+		}
+		usernames = append(usernames, username)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("db: error during user rows iteration: %w", err)
+	}
+
+	return usernames, nil
+}
+
+// HasAnyUser 检查 'users' 表中是否存在任何用户.
+func (cdb *ConfigDB) HasAnyUser() (bool, error) {
+	querySQL := `SELECT EXISTS(SELECT 1 FROM users LIMIT 1);`
+	var exists bool
+	err := cdb.DB.QueryRow(querySQL).Scan(&exists)
+	if err != nil {
+		return false, fmt.Errorf("db: failed to check if any user exists: %w", err)
+	}
+	return exists, nil
+}
+
+// IsUserExists 检查指定用户名的用户是否存在.
+func (cdb *ConfigDB) IsUserExists(username string) (bool, error) {
+	querySQL := `SELECT EXISTS(SELECT 1 FROM users WHERE username = ? LIMIT 1);`
+	var exists bool
+	err := cdb.DB.QueryRow(querySQL, username).Scan(&exists)
+	if err != nil {
+		return false, fmt.Errorf("db: failed to check if user '%s' exists: %w", username, err)
+	}
+	return exists, nil
+}
+
+// GetPasswordByUsername 从 'users' 表中根据用户名获取密码.
+func (cdb *ConfigDB) GetPasswordByUsername(username string) (string, error) {
+	querySQL := `SELECT password FROM users WHERE username = ?;`
+	var password string
+	err := cdb.DB.QueryRow(querySQL, username).Scan(&password)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return "", fmt.Errorf("db: user '%s' not found: %w", username, err)
+		}
+		return "", fmt.Errorf("db: failed to get password for user '%s': %w", username, err)
+	}
+	return password, nil
+}
+
+// --- 模板操作 (Templates Table) ---
+
+// SaveTemplate 在 'templates' 表中保存或更新一个模板.
+func (cdb *ConfigDB) SaveTemplate(entry TemplateEntry) error {
+	insertSQL := `
+	INSERT INTO templates (filename, template_type, content)
+	VALUES (?, ?, ?)
+	ON CONFLICT(filename) DO UPDATE SET
+		template_type = EXCLUDED.template_type,
+		content = EXCLUDED.content,
+		updated_at = strftime('%s', 'now');
+	`
+	_, err := cdb.DB.Exec(insertSQL, entry.Filename, entry.TemplateType, entry.Content)
+	if err != nil {
+		return fmt.Errorf("db: failed to save template '%s': %w", entry.Filename, err)
+	}
+	return nil
+}
+
+// GetTemplate 从 'templates' 表中获取一个模板内容.
+func (cdb *ConfigDB) GetTemplate(filename string) (*TemplateEntry, error) {
+	querySQL := `SELECT filename, template_type, content, created_at, updated_at FROM templates WHERE filename = ?;`
+	row := cdb.DB.QueryRow(querySQL, filename)
+
+	entry := &TemplateEntry{}
+	err := row.Scan(&entry.Filename, &entry.TemplateType, &entry.Content, &entry.CreatedAt, &entry.UpdatedAt)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, fmt.Errorf("db: template '%s' not found: %w", filename, err)
+		}
+		return nil, fmt.Errorf("db: failed to get template '%s': %w", filename, err)
+	}
+	return entry, nil
+}
+
+// DeleteTemplate 从 'templates' 表中删除一个模板.
+// 请注意: 此操作不会级联删除 'config_params' 或 'rendered_configs' 中的关联数据;
+// 因为 'templates' 表不再是它们的外键父表.
+func (cdb *ConfigDB) DeleteTemplate(filename string) error {
+	_, err := cdb.DB.Exec(`DELETE FROM templates WHERE filename = ?;`, filename)
+	if err != nil {
+		return fmt.Errorf("db: failed to delete template '%s': %w", filename, err)
+	}
+	return nil
+}
+
+// RangeTempaltes 获取所有模板的名称
+func (cdb *ConfigDB) RangeTemplates() ([]string, error) {
+	querySQL := `SELECT filename FROM templates;`
+	rows, err := cdb.DB.Query(querySQL)
+	if err != nil {
+		return nil, fmt.Errorf("db: failed to get filenames from templates: %w", err)
+	}
+	defer rows.Close()
+
+	var filenames []string
+	for rows.Next() {
+		var filename string
+		if err := rows.Scan(&filename); err != nil {
+			return nil, fmt.Errorf("db: failed to scan template filename: %w", err)
+		}
+		filenames = append(filenames, filename)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("db: error during template rows iteration: %w", err)
+	}
+
+	return filenames, nil
+}
+
+// GetAllTempaltes
+func (cdb *ConfigDB) GetAllTemplates() ([]TemplateEntry, error) {
+	querySQL := `SELECT filename, template_type, content, created_at, updated_at FROM templates;`
+	rows, err := cdb.DB.Query(querySQL)
+	if err != nil {
+		return nil, fmt.Errorf("db: failed to get all templates: %w", err)
+	}
+	defer rows.Close()
+
+	var templates []TemplateEntry
+	for rows.Next() {
+		var entry TemplateEntry
+		if err := rows.Scan(&entry.Filename, &entry.TemplateType, &entry.Content, &entry.CreatedAt, &entry.UpdatedAt); err != nil {
+			return nil, fmt.Errorf("db: failed to scan template entry: %w", err)
+		}
+		templates = append(templates, entry)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("db: error during templates rows iteration: %w", err)
+	}
+
+	return templates, nil
+}
+
+// --- 参数操作 (Config_Params Table) ---
+
+/*
+	filename        TEXT PRIMARY KEY,
+	template_type   TEXT NOT NULL,
+	params_gob      BLOB NOT NULL,
+	params_origin   BLOB NOT NULL,
+	created_at      INTEGER NOT NULL DEFAULT (strftime('%s', 'now')),
+	updated_at      INTEGER NOT NULL DEFAULT (strftime('%s', 'now'))
+*/
+
+// SaveParams 在 'config_params' 表中保存或更新一个模板的参数.
+// entry.ParamsGOB 应该是一个经过 GOB 编码的字节切片.
+func (cdb *ConfigDB) SaveParams(entry ParamsEntry) error {
+	insertSQL := `
+	INSERT INTO config_params (filename, template_type, params_gob, params_origin)
+	VALUES (?, ?, ?, ?)
+	ON CONFLICT(filename) DO UPDATE SET
+		template_type = EXCLUDED.template_type,
+		params_gob = EXCLUDED.params_gob,
+		params_origin = EXCLUDED.params_origin,
+		updated_at = strftime('%s', 'now');
+	`
+	_, err := cdb.DB.Exec(insertSQL, entry.Filename, entry.TemplateType, entry.ParamsGOB, entry.ParamsOrigin)
+	if err != nil {
+		return fmt.Errorf("db: failed to save params for '%s': %w", entry.Filename, err)
+	}
+	return nil
+}
+
+// GetParams 从 'config_params' 表中获取一个模板的参数.
+// 返回的 ParamsGOB 是 GOB 编码的字节切片; 调用方需要自行解码.
+func (cdb *ConfigDB) GetParams(filename string) (*ParamsEntry, error) {
+	querySQL := `SELECT filename, template_type, params_gob, params_origin, created_at, updated_at FROM config_params WHERE filename = ?;`
+	row := cdb.DB.QueryRow(querySQL, filename)
+
+	entry := &ParamsEntry{}
+	err := row.Scan(&entry.Filename, &entry.TemplateType, &entry.ParamsGOB, &entry.ParamsOrigin, &entry.CreatedAt, &entry.UpdatedAt)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, fmt.Errorf("db: params for '%s' not found: %w", filename, err)
+		}
+		return nil, fmt.Errorf("db: failed to get params for '%s': %w", filename, err)
+	}
+	return entry, nil
+}
+
+// DeleteParams 从 'config_params' 表中删除一个模板的参数.
+// 此操作将级联删除 'rendered_configs' 表中与该 filename 关联的所有渲染产物.
+func (cdb *ConfigDB) DeleteParams(filename string) error {
+	_, err := cdb.DB.Exec(`DELETE FROM config_params WHERE filename = ?;`, filename)
+	if err != nil {
+		return fmt.Errorf("db: failed to delete params for '%s': %w", filename, err)
+	}
+	return nil
+}
+
+// GetFileNames
+func (cdb *ConfigDB) GetFileNames() ([]string, error) {
+	querySQL := `SELECT filename FROM config_params;`
+	rows, err := cdb.DB.Query(querySQL)
+	if err != nil {
+		return nil, fmt.Errorf("db: failed to get filenames from config_params: %w", err)
+	}
+	defer rows.Close()
+
+	var filenames []string
+	for rows.Next() {
+		var filename string
+		if err := rows.Scan(&filename); err != nil {
+			return nil, fmt.Errorf("db: failed to scan filename: %w", err)
+		}
+		filenames = append(filenames, filename)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("db: error during rows iteration: %w", err)
+	}
+
+	return filenames, nil
+}
+
+// RangeAllParams
+func (cdb *ConfigDB) RangeAllParams() ([]ParamsEntry, error) {
+	querySQL := `SELECT filename, template_type, params_gob, params_origin, created_at, updated_at FROM config_params;`
+	rows, err := cdb.DB.Query(querySQL)
+	if err != nil {
+		return nil, fmt.Errorf("db: failed to get all params: %w", err)
+	}
+	defer rows.Close()
+
+	var params []ParamsEntry
+	for rows.Next() {
+		var entry ParamsEntry
+		if err := rows.Scan(&entry.Filename, &entry.TemplateType, &entry.ParamsGOB, &entry.CreatedAt, &entry.UpdatedAt); err != nil {
+			return nil, fmt.Errorf("db: failed to scan params entry: %w", err)
+		}
+		params = append(params, entry)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("db: error during params rows iteration: %w", err)
+	}
+
+	return params, nil
+}
+
+// --- 渲染产物操作 (Rendered_Configs Table) ---
+
+// SaveRenderedConfig 在 'rendered_configs' 表中保存或更新一个渲染后的配置文件内容.
+// 注意: 该操作依赖于 'config_params' 表中已存在对应的 filename; 否则会违反外键约束.
+func (cdb *ConfigDB) SaveRenderedConfig(entry RenderedConfigEntry) error {
+	insertSQL := `
+	INSERT INTO rendered_configs (filename, rendered_content, rendered_at)
+	VALUES (?, ?, strftime('%s', 'now'))
+	ON CONFLICT(filename) DO UPDATE SET
+		rendered_content = EXCLUDED.rendered_content,
+		rendered_at = strftime('%s', 'now'),
+		updated_at = strftime('%s', 'now');
+	`
+	_, err := cdb.DB.Exec(insertSQL, entry.Filename, entry.RenderedContent)
+	if err != nil {
+		return fmt.Errorf("db: failed to save rendered config for '%s': %w", entry.Filename, err)
+	}
+	return nil
+}
+
+// GetRenderedConfig 从 'rendered_configs' 表中获取一个渲染后的配置文件内容.
+func (cdb *ConfigDB) GetRenderedConfig(filename string) (*RenderedConfigEntry, error) {
+	querySQL := `SELECT filename, rendered_content, rendered_at, updated_at FROM rendered_configs WHERE filename = ?;`
+	row := cdb.DB.QueryRow(querySQL, filename)
+
+	entry := &RenderedConfigEntry{}
+	err := row.Scan(&entry.Filename, &entry.RenderedContent, &entry.RenderedAt, &entry.UpdatedAt)
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			return nil, fmt.Errorf("db: rendered config '%s' not found: %w", filename, err)
+		}
+		return nil, fmt.Errorf("db: failed to get rendered config '%s': %w", filename, err)
+	}
+	return entry, nil
+}
+
+// DeleteRenderedConfig 从 'rendered_configs' 表中删除一个渲染后的配置文件内容.
+func (cdb *ConfigDB) DeleteRenderedConfig(filename string) error {
+	_, err := cdb.DB.Exec(`DELETE FROM rendered_configs WHERE filename = ?;`, filename)
+	if err != nil {
+		return fmt.Errorf("db: failed to delete rendered config for '%s': %w", filename, err)
+	}
+	return nil
+}
+
+// RangeAllReandered
+func (cdb *ConfigDB) RangeAllReandered() ([]RenderedConfigEntry, error) {
+	querySQL := `SELECT filename, rendered_content, rendered_at, updated_at FROM rendered_configs;`
+	rows, err := cdb.DB.Query(querySQL)
+	if err != nil {
+		return nil, fmt.Errorf("db: failed to get all rendered configs: %w", err)
+	}
+	defer rows.Close()
+
+	var renderedConfigs []RenderedConfigEntry
+	for rows.Next() {
+		var entry RenderedConfigEntry
+		if err := rows.Scan(&entry.Filename, &entry.RenderedContent, &entry.RenderedAt, &entry.UpdatedAt); err != nil {
+			return nil, fmt.Errorf("db: failed to scan rendered config entry: %w", err)
+		}
+		renderedConfigs = append(renderedConfigs, entry)
+	}
+
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("db: error during rendered configs rows iteration: %w", err)
+	}
+
+	return renderedConfigs, nil
+}
+
+// --- GOB 编码/解码辅助函数 ---
+
+// gobEncode 将 Go 值编码为 GOB 格式的字节切片.
+// 'data' 必须是可被 GOB 编码的值; 例如基本类型, 切片, 映射, 结构体.
+func gobEncode(data interface{}) ([]byte, error) {
+	var buf bytes.Buffer
+	enc := gob.NewEncoder(&buf)
+	if err := enc.Encode(data); err != nil {
+		return nil, fmt.Errorf("db: failed to GOB encode data: %w", err)
+	}
+	return buf.Bytes(), nil
+}
+
+// gobDecode 将 GOB 格式的字节切片解码到 Go 值.
+// 'data' 是 GOB 编码的字节切片.
+// 'valuePtr' 必须是指向目标 Go 值的指针; 其类型必须与编码时的数据类型兼容.
+func gobDecode(data []byte, valuePtr interface{}) error {
+	buf := bytes.NewBuffer(data)
+	dec := gob.NewDecoder(buf)
+	if err := dec.Decode(valuePtr); err != nil {
+		return fmt.Errorf("db: failed to GOB decode data: %w", err)
+	}
+	return nil
+}
+
+// --- 业务逻辑: 渲染并保存 (由使用者调用) ---
+// RenderAndSaveConfig 从数据库获取模板和参数; 渲染后保存到 'rendered_configs' 表.
+// 这是一个组合操作; 通常由应用程序逻辑在需要时调用.
+// filename: 要渲染的配置文件的唯一标识.
+// templateParser: 一个实现了 TemplateParser 接口的模板解析器实例.
+// dynamicParams: 运行时动态提供的参数; 它们会覆盖存储在数据库中的同名参数.
+func (cdb *ConfigDB) RenderAndSaveConfig(filename string, dynamicParams map[string]interface{}) error {
+	// 1. 获取模板内容.
+	tmplEntry, err := cdb.GetTemplate(filename)
+	if err != nil {
+		return fmt.Errorf("db: failed to get template '%s' for rendering: %w", filename, err)
+	}
+
+	// 2. 获取存储的参数.
+	paramsEntry, err := cdb.GetParams(filename)
+	var storedParams map[string]interface{}
+	if err != nil {
+		if errors.Is(err, sql.ErrNoRows) {
+			storedParams = make(map[string]interface{}) // 参数不存在; 使用空 map.
+		} else {
+			return fmt.Errorf("db: failed to get parameters for '%s': %w", filename, err)
+		}
+	} else {
+		// 解码 GOB 参数到 map.
+		if err := gobDecode(paramsEntry.ParamsGOB, &storedParams); err != nil {
+			return fmt.Errorf("db: failed to decode stored parameters for '%s': %w", filename, err)
+		}
+	}
+
+	// 合并参数: 动态传入的参数覆盖存储的参数.
+	if dynamicParams != nil {
+		for k, v := range dynamicParams {
+			storedParams[k] = v
+		}
+	}
+
+	// 3. 渲染模板.
+	var parsedTmpl *template.Template
+	var parseErr error
+
+	// 使用传入的 templateParser 实例来解析模板内容.
+	// 注意: templateParser.Parse 是在提供的实例上调用; 以解析特定内容.
+	//parsedTmpl, parseErr = templateParser.Parse(string(tmplEntry.Content))
+	parsedTmpl, parseErr = template.New(tmplEntry.Filename).Parse(string(tmplEntry.Content))
+
+	if parseErr != nil {
+		return fmt.Errorf("db: failed to parse template content for '%s': %w", tmplEntry.Filename, parseErr)
+	}
+
+	var renderedContentBuilder strings.Builder
+	if err := parsedTmpl.Execute(&renderedContentBuilder, storedParams); err != nil {
+		return fmt.Errorf("db: failed to render template '%s': %w", tmplEntry.Filename, err)
+	}
+
+	// 4. 保存渲染结果.
+	renderedEntry := RenderedConfigEntry{
+		Filename:        filename,
+		RenderedContent: []byte(renderedContentBuilder.String()),
+	}
+	if err := cdb.SaveRenderedConfig(renderedEntry); err != nil {
+		return fmt.Errorf("db: failed to save rendered config for '%s': %w", filename, err)
+	}
+	return nil
+}

db/struct.go

@@ -0,0 +1,40 @@
+package db
+
+/*
+// 通用配置结构
+type CaddyfileConfig struct {
+	Domain     string              `json:"domain"`
+	TmplType   string              `json:"tmpl_type"`
+	UpStream   UpStreamConfig      `json:"upstream"`
+	FileServer FileServerConfig    `json:"file_server"`
+	Headers    map[string][]string `json:"headers"`
+	Log        LogConfig           `json:"log"`
+	ErrorPage  ErrorPageConfig     `json:"error_page"`
+	Encode     EncodeConfig        `json:"encode"`
+}
+
+type UpStreamConfig struct {
+	UpStream        string              `json:"upstream"`
+	MutiUpStream    bool                `json:"muti_upstream"`
+	UpStreams       []string            `json:"upstream_servers"`
+	UpStreamHeaders map[string][]string `json:"upstream_headers"`
+}
+
+type FileServerConfig struct {
+	FileDirPath   string `json:"file_dir_path"`
+	EnableBrowser bool   `json:"enable_browser"`
+}
+
+type LogConfig struct {
+	EnableLog bool   `json:"enable_log"`
+	LogDomain string `json:"log_domain"`
+}
+
+type ErrorPageConfig struct {
+	EnableErrorPage bool `json:"enable_error_page"`
+}
+
+type EncodeConfig struct {
+	EnableEncode bool `json:"enable_encode"`
+}
+*/