mirror of
https://gitee.com/johng/gf.git
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228 lines
7.2 KiB
Go
228 lines
7.2 KiB
Go
// Copyright 2018 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package gspath implements file index and search for folders.
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//
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// 搜索目录管理,
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// 可以添加搜索目录,按照添加的优先级进行文件检索,并在内部进行高效缓存处理(可选)。
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// 注意:当开启缓存功能后,在新增/删除文件时,会存在检索延迟。
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package gspath
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import (
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"errors"
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"fmt"
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"github.com/gogf/gf/g/container/garray"
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"github.com/gogf/gf/g/container/gmap"
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"github.com/gogf/gf/g/os/gfile"
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"github.com/gogf/gf/g/text/gstr"
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"os"
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"sort"
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"strings"
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)
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// 文件目录搜索管理对象
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type SPath struct {
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paths *garray.StringArray // 搜索路径,按照优先级进行排序
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cache *gmap.StrStrMap // 搜索结果缓存map(如果未nil表示未启用缓存功能)
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}
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// 文件搜索缓存项
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type SPathCacheItem struct {
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path string // 文件/目录绝对路径
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isDir bool // 是否目录
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}
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var (
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// 单个目录路径对应的SPath对象指针,用于路径检索对象复用
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pathsMap = gmap.NewStrAnyMap()
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pathsCacheMap = gmap.NewStrAnyMap()
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)
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// 创建一个搜索对象
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func New(path string, cache bool) *SPath {
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sp := &SPath {
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paths : garray.NewStringArray(),
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}
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if cache {
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sp.cache = gmap.NewStrStrMap()
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}
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if len(path) > 0 {
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if _, err := sp.Add(path); err != nil {
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//fmt.Errorf(err.Error())
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}
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}
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return sp
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}
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// 创建/获取一个单例的搜索对象, root必须为目录的绝对路径
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func Get(root string, cache bool) *SPath {
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return pathsMap.GetOrSetFuncLock(root, func() interface{} {
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return New(root, cache)
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}).(*SPath)
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}
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// 检索root目录(必须为绝对路径)下面的name文件的绝对路径,indexFiles用于指定当检索到的结果为目录时,同时检索是否存在这些indexFiles文件
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func Search(root string, name string, indexFiles...string) (filePath string, isDir bool) {
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return Get(root, false).Search(name, indexFiles...)
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}
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// 检索root目录(必须为绝对路径)下面的name文件的绝对路径,indexFiles用于指定当检索到的结果为目录时,同时检索是否存在这些indexFiles文件
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func SearchWithCache(root string, name string, indexFiles...string) (filePath string, isDir bool) {
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return Get(root, true).Search(name, indexFiles...)
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}
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// 设置搜索路径,只保留当前设置项,其他搜索路径被清空
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func (sp *SPath) Set(path string) (realPath string, err error) {
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realPath = gfile.RealPath(path)
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if realPath == "" {
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realPath, _ = sp.Search(path)
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if realPath == "" {
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realPath = gfile.RealPath(gfile.Pwd() + gfile.Separator + path)
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}
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}
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if realPath == "" {
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return realPath, errors.New(fmt.Sprintf(`path "%s" does not exist`, path))
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}
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// 设置的搜索路径必须为目录
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if gfile.IsDir(realPath) {
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realPath = strings.TrimRight(realPath, gfile.Separator)
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if sp.paths.Search(realPath) != -1 {
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for _, v := range sp.paths.Slice() {
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sp.removeMonitorByPath(v)
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}
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}
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sp.paths.Clear()
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if sp.cache != nil {
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sp.cache.Clear()
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}
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sp.paths.Append(realPath)
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sp.updateCacheByPath(realPath)
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sp.addMonitorByPath(realPath)
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return realPath, nil
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} else {
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return "", errors.New(path + " should be a folder")
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}
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}
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// 添加搜索路径
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func (sp *SPath) Add(path string) (realPath string, err error) {
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realPath = gfile.RealPath(path)
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if realPath == "" {
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realPath, _ = sp.Search(path)
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if realPath == "" {
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realPath = gfile.RealPath(gfile.Pwd() + gfile.Separator + path)
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}
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}
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if realPath == "" {
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return realPath, errors.New(fmt.Sprintf(`path "%s" does not exist`, path))
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}
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// 添加的搜索路径必须为目录
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if gfile.IsDir(realPath) {
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//fmt.Println("gspath:", realPath, sp.paths.Search(realPath))
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// 如果已经添加则不再添加
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if sp.paths.Search(realPath) < 0 {
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realPath = strings.TrimRight(realPath, gfile.Separator)
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sp.paths.Append(realPath)
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sp.updateCacheByPath(realPath)
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sp.addMonitorByPath(realPath)
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}
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return realPath, nil
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} else {
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return "", errors.New(path + " should be a folder")
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}
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}
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// 给定的name只是相对文件路径,找不到该文件时,返回空字符串;
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// 当给定indexFiles时,如果name是一个目录,那么会进一步检索其下对应的indexFiles文件是否存在,存在则返回indexFile绝对路径;
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// 否则返回name目录绝对路径。
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func (sp *SPath) Search(name string, indexFiles...string) (filePath string, isDir bool) {
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// 不使用缓存
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if sp.cache == nil {
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sp.paths.LockFunc(func(array []string) {
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path := ""
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for _, v := range array {
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path = v + gfile.Separator + name
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if stat, err := os.Stat(path); !os.IsNotExist(err) {
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filePath = path
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isDir = stat.IsDir()
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break
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}
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}
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})
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if len(indexFiles) > 0 && isDir {
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if name == "/" {
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name = ""
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}
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path := ""
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for _, file := range indexFiles {
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path = filePath + gfile.Separator + file
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if gfile.Exists(path) {
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filePath = path
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isDir = false
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break
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}
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}
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}
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return
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}
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// 使用缓存功能
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name = sp.formatCacheName(name)
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if v := sp.cache.Get(name); v != "" {
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filePath, isDir = sp.parseCacheValue(v)
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if len(indexFiles) > 0 && isDir {
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if name == "/" {
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name = ""
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}
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for _, file := range indexFiles {
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if v := sp.cache.Get(name + "/" + file); v != "" {
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return sp.parseCacheValue(v)
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}
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}
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}
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}
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return
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}
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// 从搜索路径中移除指定的文件,这样该文件无法给搜索。
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// path可以是绝对路径,也可以相对路径。
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func (sp *SPath) Remove(path string) {
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if sp.cache == nil {
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return
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}
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if gfile.Exists(path) {
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for _, v := range sp.paths.Slice() {
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name := gstr.Replace(path, v, "")
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name = sp.formatCacheName(name)
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sp.cache.Remove(name)
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}
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} else {
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name := sp.formatCacheName(path)
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sp.cache.Remove(name)
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}
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}
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// 返回当前对象搜索目录路径列表
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func (sp *SPath) Paths() []string {
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return sp.paths.Slice()
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}
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// 返回当前对象缓存的所有路径列表
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func (sp *SPath) AllPaths() []string {
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if sp.cache == nil {
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return nil
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}
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paths := sp.cache.Keys()
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if len(paths) > 0 {
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sort.Strings(paths)
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}
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return paths
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}
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// 当前的搜索路径数量
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func (sp *SPath) Size() int {
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return sp.paths.Len()
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}
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