1package main
  2
  3import (
  4	"archive/zip"
  5	"fmt"
  6	"io"
  7	"os"
  8	"path"
  9	"path/filepath"
 10	"strings"
 11	"time"
 12)
 13
 14func timeago(t *time.Time) string {
 15	d := time.Since(*t)
 16	if d.Seconds() < 60 {
 17		seconds := int(d.Seconds())
 18		if seconds == 1 {
 19			return "1 second ago"
 20		}
 21		return fmt.Sprintf("%d seconds ago", seconds)
 22	} else if d.Minutes() < 60 {
 23		minutes := int(d.Minutes())
 24		if minutes == 1 {
 25			return "1 minute ago"
 26		}
 27		return fmt.Sprintf("%d minutes ago", minutes)
 28	} else if d.Hours() < 24 {
 29		hours := int(d.Hours())
 30		if hours == 1 {
 31			return "1 hour ago"
 32		}
 33		return fmt.Sprintf("%d hours ago", hours)
 34	} else {
 35		days := int(d.Hours()) / 24
 36		if days == 1 {
 37			return "1 day ago"
 38		}
 39		return fmt.Sprintf("%d days ago", days)
 40	}
 41}
 42
 43func userHasSpace(user string, newBytes int) bool {
 44	userPath := path.Join(c.FilesDirectory, user)
 45	size, err := dirSize(userPath)
 46	if err != nil || size+int64(newBytes) > c.MaxUserBytes {
 47		return false
 48	}
 49	return true
 50}
 51
 52func dirSize(path string) (int64, error) {
 53	var size int64
 54	err := filepath.Walk(path, func(_ string, info os.FileInfo, err error) error {
 55		if err != nil {
 56			return err
 57		}
 58		if !info.IsDir() {
 59			size += info.Size()
 60		}
 61		return err
 62	})
 63	return size, err
 64}
 65
 66/// Perform some checks to make sure the file is OK
 67func checkIfValidFile(filename string, fileBytes []byte) error {
 68	if len(filename) == 0 {
 69		return fmt.Errorf("Please enter a filename")
 70	}
 71	if len(filename) > 256 { // arbitrarily chosen
 72		return fmt.Errorf("Filename is too long")
 73	}
 74	ext := strings.ToLower(path.Ext(filename))
 75	found := false
 76	for _, mimetype := range c.OkExtensions {
 77		if ext == mimetype {
 78			found = true
 79		}
 80	}
 81	if !found {
 82		return fmt.Errorf("Invalid file extension: %s", ext)
 83	}
 84	if len(fileBytes) > c.MaxFileBytes {
 85		return fmt.Errorf("File too large. File was %d bytes, Max file size is %d", len(fileBytes), c.MaxFileBytes)
 86	}
 87	//
 88	return nil
 89}
 90
 91func zipit(source string, target io.Writer) error {
 92	archive := zip.NewWriter(target)
 93
 94	info, err := os.Stat(source)
 95	if err != nil {
 96		return nil
 97	}
 98
 99	var baseDir string
100	if info.IsDir() {
101		baseDir = filepath.Base(source)
102	}
103
104	filepath.Walk(source, func(path string, info os.FileInfo, err error) error {
105		if err != nil {
106			return err
107		}
108
109		header, err := zip.FileInfoHeader(info)
110		if err != nil {
111			return err
112		}
113
114		if baseDir != "" {
115			header.Name = filepath.Join(baseDir, strings.TrimPrefix(path, source))
116		}
117
118		if info.IsDir() {
119			header.Name += "/"
120		} else {
121			header.Method = zip.Deflate
122		}
123
124		writer, err := archive.CreateHeader(header)
125		if err != nil {
126			return err
127		}
128
129		if info.IsDir() {
130			return nil
131		}
132
133		file, err := os.Open(path)
134		if err != nil {
135			return err
136		}
137		defer file.Close()
138		_, err = io.Copy(writer, file)
139		return err
140	})
141
142	archive.Close()
143
144	return err
145}