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MetaLab/internal/theme/loader.go

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package theme
import (
"html/template"
"os"
"path/filepath"
"strings"
)
// TemplateRoot 模板根目录配置
type TemplateRoot struct {
Dir string // 目录路径
Prefix string // 模板名前缀(如 "admin/" 表示管理后台)
}
// LoadTemplates 加载多个根目录的 .html 模板到同一模板集
// 模板名 = prefix + 相对于 root.Dir 的相对路径
func LoadTemplates(roots ...TemplateRoot) (*template.Template, error) {
t := template.New("")
for _, root := range roots {
dir := filepath.Clean(root.Dir) + string(os.PathSeparator)
err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
if err != nil {
return err
}
if info.IsDir() || filepath.Ext(path) != ".html" {
return nil
}
content, err := os.ReadFile(path)
if err != nil {
return err
}
// 模板名prefix + 相对路径
name := root.Prefix + strings.TrimPrefix(path, dir)
_, err = t.New(name).Parse(string(content))
return err
})
if err != nil {
return nil, err
}
}
return t, nil
}
// LoadContent 读取主题内容文件(准则等),返回不转义的 template.HTML。
// 后期改为查数据库时,只需修改此函数实现,调用方不变。
func LoadContent(path string) (template.HTML, error) {
content, err := os.ReadFile(path)
if err != nil {
return "", err
}
return template.HTML(content), nil
}