BIG core logic rewrite

pkg/core/helpers.go

@@ -2,6 +2,10 @@ package core
 
 import (
 	cryptorand "crypto/rand"
+	"github.com/rs/zerolog/log"
+	"runtime"
+	"strconv"
+	"strings"
 )
 
 const digits = "0123456789abcdefghijklmnopqrstuvwxyz"
@@ -17,3 +21,35 @@ func RandString(size byte) string {
 	}
 	return string(b)
 }
+
+func Between(s, sub1, sub2 string) string {
+	i := strings.Index(s, sub1)
+	if i < 0 {
+		return ""
+	}
+	s = s[i+len(sub1):]
+
+	if len(sub2) == 1 {
+		i = strings.IndexByte(s, sub2[0])
+	} else {
+		i = strings.Index(s, sub2)
+	}
+	if i >= 0 {
+		return s[:i]
+	}
+
+	return s
+}
+
+func Assert(ok bool) {
+	if !ok {
+		_, file, line, _ := runtime.Caller(1)
+		panic(file + ":" + strconv.Itoa(line))
+	}
+}
+
+func Caller() string {
+	log.Error().Caller(0).Send()
+	_, file, line, _ := runtime.Caller(1)
+	return file + ":" + strconv.Itoa(line)
+}