Reorganize packages

lib/common.go

@@ -1,5 +1,12 @@
 package lib
 
+import (
+	"net/url"
+	"path"
+	"strconv"
+	"strings"
+)
+
 func Contains[T comparable](s []T, v T) bool {
 	for _, x := range s {
 		if x == v {
@@ -8,3 +15,53 @@ func Contains[T comparable](s []T, v T) bool {
 	}
 	return false
 }
+
+func JoinInt(a []int, sep string) string {
+	var b []string
+
+	b = make([]string, len(a))
+
+	for i, v := range a {
+		b[i] = strconv.Itoa(v)
+	}
+
+	return strings.Join(b, sep)
+}
+
+func SumInt(a []int) int {
+	var sum int
+	for _, v := range a {
+		sum += v
+	}
+	return sum
+}
+
+func Itob(v int) bool {
+	if v == 1 {
+		return true
+	}
+
+	return false
+}
+
+func BuildURI(rawuri, rawpath string) string {
+	u, _ := url.Parse(rawuri)
+	u.Path = path.Join(u.Path, rawpath)
+	return u.String()
+}
+
+func HasCommand(s, prefix, cmd string) bool {
+	if len(s) < 2 {
+		return false
+	}
+
+	if string(s[0]) != prefix {
+		return false
+	}
+
+	if s[1:] == cmd {
+		return true
+	}
+
+	return false
+}

lib/rand.go

@@ -33,3 +33,7 @@ func SeedMathRand() error {
 
 	return err
 }
+
+func RandInt(min int, max int) int {
+	return rand.Intn(max-min+1) + min
+}