wide/file/files.go

532 lines
12 KiB
Go

// File tree manipulations.
package file
import (
"encoding/json"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"runtime"
"sort"
"strings"
"github.com/b3log/wide/conf"
"github.com/b3log/wide/event"
"github.com/b3log/wide/session"
"github.com/b3log/wide/util"
"github.com/golang/glog"
)
// File node, used to construct the file tree.
type FileNode struct {
Name string `json:"name"`
Title string `json:"title"`
Path string `json:"path"`
IconSkin string `json:"iconSkin"` // Value should be end with a space
Type string `json:"type"` // "f": file, "d": directory
Creatable bool `json:"creatable"` // whether can create file in this file node
Removable bool `json:"removable"` // whether can remove this file node
Mode string `json:"mode"`
FileNodes []*FileNode `json:"children"`
}
// Source code snippet, used to as the result of "Find Usages", "Search".
type Snippet struct {
Path string `json:"path"` // file path
Line int `json:"line"` // line number
Ch int `json:"ch"` // column number
Contents []string `json:"contents"` // lines nearby
}
// GetFiles handles request of constructing user workspace file tree.
//
// The Go API source code package ($GOROOT/src/pkg) also as a child node,
// so that users can easily view the Go API source code.
func GetFiles(w http.ResponseWriter, r *http.Request) {
data := map[string]interface{}{"succ": true}
defer util.RetJSON(w, r, data)
session, _ := session.HTTPSession.Get(r, "wide-session")
username := session.Values["username"].(string)
userWorkspace := conf.Wide.GetUserWorkspace(username)
workspaces := filepath.SplitList(userWorkspace)
root := FileNode{Name: "root", Path: "", IconSkin: "ico-ztree-dir ", Type: "d", FileNodes: []*FileNode{}}
// workspace node process
for _, workspace := range workspaces {
workspacePath := workspace + conf.PathSeparator + "src"
workspaceNode := FileNode{Name: workspace[strings.LastIndex(workspace, conf.PathSeparator)+1:],
Title: workspace, Path: workspacePath, IconSkin: "ico-ztree-dir-workspace ", Type: "d",
Creatable: true, Removable: false, FileNodes: []*FileNode{}}
walk(workspacePath, &workspaceNode)
// add workspace node
root.FileNodes = append(root.FileNodes, &workspaceNode)
}
// construct Go API node
apiPath := runtime.GOROOT() + conf.PathSeparator + "src" + conf.PathSeparator + "pkg"
apiNode := FileNode{Name: "Go API", Title: apiPath, Path: apiPath, IconSkin: "ico-ztree-dir-api ", Type: "d",
Creatable: true, Removable: false, FileNodes: []*FileNode{}}
goapiBuildOKSignal := make(chan bool)
go func() {
walk(apiPath, &apiNode)
// go-ahead
close(goapiBuildOKSignal)
}()
// waiting
<-goapiBuildOKSignal
// add Go API node
root.FileNodes = append(root.FileNodes, &apiNode)
data["root"] = root
}
// GetFile handles request of opening file by editor.
func GetFile(w http.ResponseWriter, r *http.Request) {
data := map[string]interface{}{"succ": true}
defer util.RetJSON(w, r, data)
var args map[string]interface{}
if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
glog.Error(err)
data["succ"] = false
return
}
path := args["path"].(string)
buf, _ := ioutil.ReadFile(path)
extension := filepath.Ext(path)
if isImg(extension) {
// image file will be open in a browser tab
data["mode"] = "img"
path2 := strings.Replace(path, "\\", "/", -1)
idx := strings.Index(path2, "/data/user_workspaces")
data["path"] = path2[idx:]
return
}
content := string(buf)
if isBinary(content) {
data["succ"] = false
data["msg"] = "Can't open a binary file :("
} else {
data["content"] = content
data["mode"] = getEditorMode(extension)
data["path"] = path
}
}
// SaveFile handles request of saving file.
func SaveFile(w http.ResponseWriter, r *http.Request) {
data := map[string]interface{}{"succ": true}
defer util.RetJSON(w, r, data)
var args map[string]interface{}
if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
glog.Error(err)
data["succ"] = false
return
}
filePath := args["file"].(string)
sid := args["sid"].(string)
fout, err := os.Create(filePath)
if nil != err {
glog.Error(err)
data["succ"] = false
return
}
code := args["code"].(string)
fout.WriteString(code)
if err := fout.Close(); nil != err {
glog.Error(err)
data["succ"] = false
wSession := session.WideSessions.Get(sid)
wSession.EventQueue.Queue <- &event.Event{Code: event.EvtCodeServerInternalError, Sid: sid,
Data: "can't save file " + filePath}
return
}
}
// NewFile handles request of creating file or directory.
func NewFile(w http.ResponseWriter, r *http.Request) {
data := map[string]interface{}{"succ": true}
defer util.RetJSON(w, r, data)
var args map[string]interface{}
if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
glog.Error(err)
data["succ"] = false
return
}
path := args["path"].(string)
fileType := args["fileType"].(string)
sid := args["sid"].(string)
wSession := session.WideSessions.Get(sid)
if !createFile(path, fileType) {
data["succ"] = false
wSession.EventQueue.Queue <- &event.Event{Code: event.EvtCodeServerInternalError, Sid: sid,
Data: "can't create file " + path}
return
}
if "f" == fileType {
extension := filepath.Ext(path)
data["mode"] = getEditorMode(extension)
}
}
// RemoveFile handles request of removing file or directory.
func RemoveFile(w http.ResponseWriter, r *http.Request) {
data := map[string]interface{}{"succ": true}
defer util.RetJSON(w, r, data)
var args map[string]interface{}
if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
glog.Error(err)
data["succ"] = false
return
}
path := args["path"].(string)
sid := args["sid"].(string)
wSession := session.WideSessions.Get(sid)
if !removeFile(path) {
data["succ"] = false
wSession.EventQueue.Queue <- &event.Event{Code: event.EvtCodeServerInternalError, Sid: sid,
Data: "can't remove file " + path}
}
}
// SearchText handles request of searching files under the specified directory with the specified keyword.
func SearchText(w http.ResponseWriter, r *http.Request) {
data := map[string]interface{}{"succ": true}
defer util.RetJSON(w, r, data)
var args map[string]interface{}
if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
glog.Error(err)
data["succ"] = false
return
}
dir := args["dir"].(string)
extension := args["extension"].(string)
text := args["text"].(string)
founds := search(dir, extension, text, []*Snippet{})
data["founds"] = founds
}
// walk traverses the specified path to build a file tree.
func walk(path string, node *FileNode) {
files := listFiles(path)
for _, filename := range files {
fpath := filepath.Join(path, filename)
fio, _ := os.Lstat(fpath)
child := FileNode{Name: filename, Title: fpath, Path: fpath, Removable: true, FileNodes: []*FileNode{}}
node.FileNodes = append(node.FileNodes, &child)
if nil == fio {
glog.Warningf("Path [%s] is nil", fpath)
continue
}
if fio.IsDir() {
child.Type = "d"
child.Creatable = true
child.IconSkin = "ico-ztree-dir "
walk(fpath, &child)
} else {
child.Type = "f"
child.Creatable = false
ext := filepath.Ext(fpath)
child.IconSkin = getIconSkin(ext)
child.Mode = getEditorMode(ext)
}
}
return
}
// listFiles lists names of files under the specified dirname.
func listFiles(dirname string) []string {
f, _ := os.Open(dirname)
names, _ := f.Readdirnames(-1)
f.Close()
sort.Strings(names)
dirs := []string{}
files := []string{}
// sort: directories in front of files
for _, name := range names {
fio, _ := os.Lstat(filepath.Join(dirname, name))
if fio.IsDir() {
// exclude the .git direcitory
if ".git" == fio.Name() {
continue
}
dirs = append(dirs, name)
} else {
files = append(files, name)
}
}
return append(dirs, files...)
}
// getIconSkin gets CSS class name of icon with the specified filename extension.
//
// Refers to the zTree document for CSS class names.
func getIconSkin(filenameExtension string) string {
if isImg(filenameExtension) {
return "ico-ztree-img "
}
switch filenameExtension {
case ".html", ".htm":
return "ico-ztree-html "
case ".go":
return "ico-ztree-go "
case ".css":
return "ico-ztree-css "
case ".txt":
return "ico-ztree-text "
case ".sql":
return "ico-ztree-sql "
case ".properties":
return "ico-ztree-pro "
case ".md":
return "ico-ztree-md "
case ".js", ".json":
return "ico-ztree-js "
case ".xml":
return "ico-ztree-xml "
default:
return "ico-ztree-other "
}
}
// getEditorMode gets editor mode with the specified filename extension.
//
// Refers to the CodeMirror document for modes.
func getEditorMode(filenameExtension string) string {
switch filenameExtension {
case ".go":
return "text/x-go"
case ".html":
return "text/html"
case ".md":
return "text/x-markdown"
case ".js":
return "text/javascript"
case ".json":
return "application/json"
case ".css":
return "text/css"
case ".xml":
return "application/xml"
case ".sh":
return "text/x-sh"
case ".sql":
return "text/x-sql"
default:
return "text/plain"
}
}
// createFile creates file on the specified path.
//
// fileType:
//
// "f": file
// "d": directory
func createFile(path, fileType string) bool {
switch fileType {
case "f":
file, err := os.OpenFile(path, os.O_CREATE, 0664)
if nil != err {
glog.Error(err)
return false
}
defer file.Close()
glog.V(5).Infof("Created file [%s]", path)
return true
case "d":
err := os.Mkdir(path, 0775)
if nil != err {
glog.Error(err)
return false
}
glog.V(5).Infof("Created directory [%s]", path)
return true
default:
glog.Errorf("Unsupported file type [%s]", fileType)
return false
}
}
// removeFile removes file on the specified path.
func removeFile(path string) bool {
if err := os.RemoveAll(path); nil != err {
glog.Errorf("Removes [%s] failed: [%s]", path, err.Error())
return false
}
glog.Infof("Removed [%s]", path)
return true
}
// search finds file under the specified dir and its sub-directories with the specified text, likes the command grep/findstr.
func search(dir, extension, text string, snippets []*Snippet) []*Snippet {
if !strings.HasSuffix(dir, conf.PathSeparator) {
dir += conf.PathSeparator
}
f, _ := os.Open(dir)
fileInfos, err := f.Readdir(-1)
f.Close()
if nil != err {
glog.Errorf("Read dir [%s] failed: [%s]", dir, err.Error())
return snippets
}
for _, fileInfo := range fileInfos {
path := dir + fileInfo.Name()
if fileInfo.IsDir() {
// enter the directory recursively
snippets = search(path, extension, text, snippets)
} else if strings.HasSuffix(path, extension) {
// grep in file
ss := searchInFile(path, text)
snippets = append(snippets, ss...)
}
}
return snippets
}
// searchInFile finds file with the specified path and text.
func searchInFile(path string, text string) []*Snippet {
ret := []*Snippet{}
bytes, err := ioutil.ReadFile(path)
if nil != err {
glog.Errorf("Read file [%s] failed: [%s]", path, err.Error())
return ret
}
content := string(bytes)
if isBinary(content) {
return ret
}
lines := strings.Split(content, "\n")
for idx, line := range lines {
ch := strings.Index(line, text)
if -1 != ch {
snippet := &Snippet{Path: path, Line: idx + 1, Ch: ch + 1, Contents: []string{line}}
ret = append(ret, snippet)
}
}
return ret
}
// isBinary determines whether the specified content is a binary file content.
func isBinary(content string) bool {
for _, b := range content {
if 0 == b {
return true
}
}
return false
}
// isImg determines whether the specified extension is a image.
func isImg(extension string) bool {
ext := strings.ToLower(extension)
switch ext {
case ".jpg", ".jpeg", ".bmp", ".gif", ".png", ".svg", ".ico":
return true
default:
return false
}
}