package controller

import (

"archive/tar"

"bytes"

"compress/gzip"

"context"

"fmt"

"io"

"io/fs"

"os"

"path/filepath"

"strings"

"github.com/railwayapp/cli/entity"

gitignore "github.com/railwayapp/cli/gateway"

)

var validIgnoreFile = map[string]bool{

".gitignore": true,

".railwayignore": true,

}

var skipDirs = []string{

".git",

"node_modules",

}

type ignoreFile struct {

prefix string

ignore *gitignore.GitIgnore

}

func scanIgnoreFiles(src string) ([]ignoreFile, error) {

ignoreFiles := []ignoreFile{}

if err := filepath.WalkDir(src, func(path string, d fs.DirEntry, err error) error {

if err != nil {

return err

}

if d.IsDir() {

// no sense scanning for ignore files in skipped dirs

for _, s := range skipDirs {

if filepath.Base(path) == s {

return filepath.SkipDir

}

}

return nil

}

fname := filepath.Base(path)

if validIgnoreFile[fname] {

igf, err := gitignore.CompileIgnoreFile(path)

if err != nil {

return err

}

prefix := filepath.Dir(path)

if prefix == "." {

prefix = "" // Handle root dir properly.

}

ignoreFiles = append(ignoreFiles, ignoreFile{

prefix: prefix,

ignore: igf,

})

}

return nil

}); err != nil {

return nil, err

}

return ignoreFiles, nil

}

func compress(src string, buf io.Writer) error {

// tar > gzip > buf

zr := gzip.NewWriter(buf)

tw := tar.NewWriter(zr)

// find all ignore files, including those in subdirs

ignoreFiles, err := scanIgnoreFiles(src)

if err != nil {

return err

}

// walk through every file in the folder

err = filepath.WalkDir(src, func(file string, de os.DirEntry, passedErr error) error {

if passedErr != nil {

return err

}

if de.IsDir() {

// skip directories if we can (for perf)

// e.g., want to avoid walking node_modules dir

for _, s := range skipDirs {

if filepath.Base(file) == s {

return filepath.SkipDir

}

}

return nil

}

// follow symlinks by default

ln, err := filepath.EvalSymlinks(file)

if err != nil {

return err

}

// get info about the file the link points at

fi, err := os.Lstat(ln)

if err != nil {

return err

}

for _, igf := range ignoreFiles {

if strings.HasPrefix(file, igf.prefix) { // if ignore file applicable

trimmed := strings.TrimPrefix(file, igf.prefix)

if igf.ignore.MatchesPath(trimmed) {

return nil

}

}

}

// read file into a buffer to prevent tar overwrites

data := bytes.NewBuffer(nil)

f, err := os.Open(ln)

if err != nil {

return err

}

_, err = io.Copy(data, f)

if err != nil {

return err

}

// close the file to avoid hitting fd limit

if err := f.Close(); err != nil {

return err

}

// generate tar headers

header, err := tar.FileInfoHeader(fi, ln)

if err != nil {

return err

}

// must provide real name

// (see https://golang.org/src/archive/tar/common.go?#L626)

header.Name = filepath.ToSlash(file)

// size when we first observed the file

header.Size = int64(data.Len())

// write header

if err := tw.WriteHeader(header); err != nil {

return err

}

// not a dir, write file content

if _, err := io.Copy(tw, data); err != nil {

return err

}

return err

})

if err != nil {

return err

}

// produce tar

if err := tw.Close(); err != nil {

return err

}

// produce gzip

if err := zr.Close(); err != nil {

return err

}

return nil

}

func (c *Controller) Upload(

ctx context.Context,

req *entity.UploadRequest,

) (*entity.UpResponse, error) {

var buf bytes.Buffer

if err := compress(req.RootDir, &buf); err != nil {

return nil, err

}

res, err := c.gtwy.Up(ctx, &entity.UpRequest{

Data: buf,

ProjectID: req.ProjectID,

EnvironmentID: req.EnvironmentID,

ServiceID: req.ServiceID,

})

if err != nil {

return nil, err

}

return res, nil

}

func (c *Controller) GetFullUrlFromStaticUrl(staticUrl string) string {

return fmt.Sprintf("https://%s", staticUrl)

}