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package util
import (
"crypto/sha256"
"encoding/hex"
"fmt"
"os"
"regexp"
"strings"
"github.com/FChannel0/FChannel-Server/config"
)
func IsOnion(url string) bool {
re := regexp.MustCompile(`\.onion`)
if re.MatchString(url) {
return true
}
return false
}
func StripTransferProtocol(value string) string {
re := regexp.MustCompile("(http://|https://)?(www.)?")
value = re.ReplaceAllString(value, "")
return value
}
func GetCaptchaCode(captcha string) string {
re := regexp.MustCompile("\\w+\\.\\w+$")
code := re.FindString(captcha)
re = regexp.MustCompile("\\w+")
code = re.FindString(code)
return code
}
func ShortURL(actorName string, url string) string {
re := regexp.MustCompile(`.+\/`)
actor := re.FindString(actorName)
urlParts := strings.Split(url, "|")
op := urlParts[0]
var reply string
if len(urlParts) > 1 {
reply = urlParts[1]
}
re = regexp.MustCompile(`\w+$`)
temp := re.ReplaceAllString(op, "")
if temp == actor {
id := LocalShort(op)
re := regexp.MustCompile(`.+\/`)
replyCheck := re.FindString(reply)
if reply != "" && replyCheck == actor {
id = id + "#" + LocalShort(reply)
} else if reply != "" {
id = id + "#" + RemoteShort(reply)
}
return id
} else {
id := RemoteShort(op)
re := regexp.MustCompile(`.+\/`)
replyCheck := re.FindString(reply)
if reply != "" && replyCheck == actor {
id = id + "#" + LocalShort(reply)
} else if reply != "" {
id = id + "#" + RemoteShort(reply)
}
return id
}
}
func LocalShort(url string) string {
re := regexp.MustCompile(`\w+$`)
return re.FindString(StripTransferProtocol(url))
}
func RemoteShort(url string) string {
re := regexp.MustCompile(`\w+$`)
id := re.FindString(StripTransferProtocol(url))
re = regexp.MustCompile(`.+/.+/`)
actorurl := re.FindString(StripTransferProtocol(url))
re = regexp.MustCompile(`/.+/`)
actorname := re.FindString(actorurl)
actorname = strings.Replace(actorname, "/", "", -1)
return "f" + actorname + "-" + id
}
func ShortImg(url string) string {
nURL := url
re := regexp.MustCompile(`(\.\w+$)`)
fileName := re.ReplaceAllString(url, "")
if len(fileName) > 26 {
re := regexp.MustCompile(`(^.{26})`)
match := re.FindStringSubmatch(fileName)
if len(match) > 0 {
nURL = match[0]
}
re = regexp.MustCompile(`(\..+$)`)
match = re.FindStringSubmatch(url)
if len(match) > 0 {
nURL = nURL + "(...)" + match[0]
}
}
return nURL
}
func ConvertSize(size int64) string {
var rValue string
convert := float32(size) / 1024.0
if convert > 1024 {
convert = convert / 1024.0
rValue = fmt.Sprintf("%.2f MB", convert)
} else {
rValue = fmt.Sprintf("%.2f KB", convert)
}
return rValue
}
// IsInStringArray looks for a string in a string array and returns true if it is found.
func IsInStringArray(haystack []string, needle string) bool {
for _, e := range haystack {
if e == needle {
return true
}
}
return false
}
// GetUniqueFilename will look for an available random filename in the /public/ directory.
func GetUniqueFilename(ext string) string {
id := RandomID(8)
file := "/public/" + id + "." + ext
for true {
if _, err := os.Stat("." + file); err == nil {
id = RandomID(8)
file = "/public/" + id + "." + ext
} else {
return "/public/" + id + "." + ext
}
}
return ""
}
func HashMedia(media string) string {
h := sha256.New()
h.Write([]byte(media))
return hex.EncodeToString(h.Sum(nil))
}
func HashBytes(media []byte) string {
h := sha256.New()
h.Write(media)
return hex.EncodeToString(h.Sum(nil))
}
func EscapeString(text string) string {
// TODO: not enough
text = strings.Replace(text, "<", "<", -1)
return text
}
func CreateUniqueID(actor string) (string, error) {
var newID string
isUnique := false
for !isUnique {
newID = RandomID(8)
query := "select id from activitystream where id=$1"
args := fmt.Sprintf("%s/%s/%s", config.Domain, actor, newID)
rows, err := config.DB.Query(query, args)
if err != nil {
return "", err
}
defer rows.Close()
// reusing a variable here
// if we encounter a match, it'll get set to false causing the outer for loop to loop and to go through this all over again
// however if nothing is there, it'll remain true and exit the loop
isUnique = true
for rows.Next() {
isUnique = false
break
}
}
return newID, nil
}
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