aadd first files based on caddy-filemanager

Former-commit-id: 20baeeb41a

filemanager.go

@@ -0,0 +1,77 @@
+package filemanager
+
+import (
+	"net/http"
+	"regexp"
+	"strings"
+
+	"golang.org/x/net/webdav"
+)
+
+// CommandFunc ...
+type CommandFunc func(r *http.Request, c *Config, u *User) error
+
+// Config is a configuration for browsing in a particular path.
+type Config struct {
+	*User
+	PrefixURL   string
+	BaseURL     string
+	WebDavURL   string
+	HugoEnabled bool // Enables the Hugo plugin for File Manager
+	Users       map[string]*User
+	BeforeSave  CommandFunc
+	AfterSave   CommandFunc
+}
+
+// AbsoluteURL ...
+func (c Config) AbsoluteURL() string {
+	return c.PrefixURL + c.BaseURL
+}
+
+// AbsoluteWebdavURL ...
+func (c Config) AbsoluteWebdavURL() string {
+	return c.PrefixURL + c.WebDavURL
+}
+
+// Rule is a dissalow/allow rule
+type Rule struct {
+	Regex  bool
+	Allow  bool
+	Path   string
+	Regexp *regexp.Regexp
+}
+
+// User contains the configuration for each user
+type User struct {
+	Scope         string            `json:"-"` // Path the user have access
+	FileSystem    webdav.FileSystem `json:"-"` // The virtual file system the user have access
+	Handler       *webdav.Handler   `json:"-"` // The WebDav HTTP Handler
+	StyleSheet    string            `json:"-"` // Costum stylesheet
+	AllowNew      bool              // Can create files and folders
+	AllowEdit     bool              // Can edit/rename files
+	AllowCommands bool              // Can execute commands
+	Commands      []string          // Available Commands
+	Rules         []*Rule           `json:"-"` // Access rules
+}
+
+// Allowed checks if the user has permission to access a directory/file
+func (u User) Allowed(url string) bool {
+	var rule *Rule
+	i := len(u.Rules) - 1
+
+	for i >= 0 {
+		rule = u.Rules[i]
+
+		if rule.Regex {
+			if rule.Regexp.MatchString(url) {
+				return rule.Allow
+			}
+		} else if strings.HasPrefix(url, rule.Path) {
+			return rule.Allow
+		}
+
+		i--
+	}
+
+	return true
+}