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
 43// TODO move into checkIfValidFile. rename it
 44func userHasSpace(user string, newBytes int) bool {
 45	userPath := path.Join(c.FilesDirectory, user)
 46	size, err := dirSize(userPath)
 47	if err != nil || size+int64(newBytes) > c.MaxUserBytes {
 48		return false
 49	}
 50	return true
 51}
 52
 53func dirSize(path string) (int64, error) {
 54	var size int64
 55	err := filepath.Walk(path, func(_ string, info os.FileInfo, err error) error {
 56		if err != nil {
 57			return err
 58		}
 59		if !info.IsDir() {
 60			size += info.Size()
 61		}
 62		return err
 63	})
 64	return size, err
 65}
 66
 67/// Perform some checks to make sure the file is OK
 68func checkIfValidFile(filename string, fileBytes []byte) error {
 69	if len(filename) == 0 {
 70		return fmt.Errorf("Please enter a filename")
 71	}
 72	if len(filename) > 256 { // arbitrarily chosen
 73		return fmt.Errorf("Filename is too long")
 74	}
 75	ext := strings.ToLower(path.Ext(filename))
 76	found := false
 77	for _, mimetype := range c.OkExtensions {
 78		if ext == mimetype {
 79			found = true
 80		}
 81	}
 82	if !found {
 83		return fmt.Errorf("Invalid file extension: %s", ext)
 84	}
 85	if len(fileBytes) > c.MaxFileBytes {
 86		return fmt.Errorf("File too large. File was %d bytes, Max file size is %d", len(fileBytes), c.MaxFileBytes)
 87	}
 88	//
 89	return nil
 90}
 91
 92func zipit(source string, target io.Writer) error {
 93	archive := zip.NewWriter(target)
 94
 95	info, err := os.Stat(source)
 96	if err != nil {
 97		return nil
 98	}
 99
100	var baseDir string
101	if info.IsDir() {
102		baseDir = filepath.Base(source)
103	}
104
105	filepath.Walk(source, func(path string, info os.FileInfo, err error) error {
106		if err != nil {
107			return err
108		}
109
110		header, err := zip.FileInfoHeader(info)
111		if err != nil {
112			return err
113		}
114
115		if baseDir != "" {
116			header.Name = filepath.Join(baseDir, strings.TrimPrefix(path, source))
117		}
118
119		if info.IsDir() {
120			header.Name += "/"
121		} else {
122			header.Method = zip.Deflate
123		}
124
125		writer, err := archive.CreateHeader(header)
126		if err != nil {
127			return err
128		}
129
130		if info.IsDir() {
131			return nil
132		}
133
134		file, err := os.Open(path)
135		if err != nil {
136			return err
137		}
138		defer file.Close()
139		_, err = io.Copy(writer, file)
140		return err
141	})
142
143	archive.Close()
144
145	return err
146}