first commit

lib/util.go

@@ -0,0 +1,104 @@
+package lib
+
+import (
+	"archive/tar"
+	"bytes"
+	"compress/gzip"
+	"errors"
+	"fmt"
+	"io"
+	"strings"
+	"time"
+
+	"github.com/gofiber/fiber/v2"
+)
+
+func RenderError(c *fiber.Ctx, code int) error{
+  var msg string = "Server Error"
+  c.Status(code)
+
+  switch code {
+  case 404:
+    msg = "Not Found"
+  }
+
+  return c.Render("error", fiber.Map{
+    "msg": msg,
+  })
+}
+
+func SizeFromBytes(size int) string {
+  if(size > 1024*1024*1024) {
+    return fmt.Sprintf("%dGB", (size/1024/1024/1024))
+  }else if(size > 1024*1024) {
+    return fmt.Sprintf("%dMB", (size/1024/1024))
+  }else if(size > 1024) { 
+    return fmt.Sprintf("%dKB", (size/1024))
+  }
+  return fmt.Sprintf("%dB", size)
+}
+
+func ExtractFile(raw []byte, file string) (string, error){
+  stream := bytes.NewReader(raw) 
+  ustream, err := gzip.NewReader(stream)
+  if err != nil {
+    return "", err
+  }
+
+  reader := tar.NewReader(ustream)
+  var header *tar.Header
+    
+  for header, err = reader.Next(); err == nil; header, err = reader.Next() {
+    if header.Typeflag != tar.TypeReg {
+      return "", errors.New("Found invalid entry in archive")
+    }
+
+    if header.Name != file {
+      continue
+    }
+
+    buf := new(strings.Builder)
+    _, err := io.Copy(buf, reader)
+    if err != nil {
+      return "", errors.New("Failed to extract file to memory")
+    }
+
+    return buf.String(), nil
+  }
+
+  return "", errors.New("File not found")
+}
+
+func GetTimePassed(t time.Time) string {
+  diff := time.Since(t)
+  res := fmt.Sprintf(
+    "%ds ago", 
+    int(diff.Seconds()),
+  )
+
+  if diff.Minutes() > 1 { 
+    res = fmt.Sprintf(
+      "%dm and %ds ago", 
+      int(diff.Minutes()), int(diff.Seconds())-(int(diff.Minutes())*60),
+    )
+  }
+
+  if diff.Hours() > 1 {
+    res = fmt.Sprintf("%dh and %dm ago", 
+      int(diff.Hours()),
+      int(diff.Minutes())-(int(diff.Hours())*60), 
+    )
+  }
+
+  return res
+}
+
+func CleanString(s string) string{
+  var possible_bad_char_list_that_i_made_up_which_may_contain_bad_xss_chars_look_im_not_gonna_search_for_a_xss_charlist_just_to_prevent_self_xss []string = []string{"'", "\"", "/", "<", ">", "?", "=", "#", "(", ")", "{", "}", "*", "!", "`", "[", "]"}
+
+  for _, c := range possible_bad_char_list_that_i_made_up_which_may_contain_bad_xss_chars_look_im_not_gonna_search_for_a_xss_charlist_just_to_prevent_self_xss {
+    s = strings.ReplaceAll(s, c, "")
+  } 
+
+  return s
+}