2 files changed, 51 insertions, 0 deletions
diff --git a/strings/strings.go b/strings/strings.go
index 3ee15c61..8c10865a 100644
--- a/strings/strings.go
+++ b/strings/strings.go
@@ -1,6 +1,7 @@
 package strings
 
 import (
+	"regexp"
 	"sort"
 	"strings"
 )
@@ -45,3 +46,38 @@ func Sort(list []string) []string {
 	sorted.Sort()
 	return sorted
 }
+
+var (
+	spaces      = regexp.MustCompile(`\s+`)
+	nonAlphaNum = regexp.MustCompile(`[^\pL\pN]+`)
+)
+
+// SnakeCase -
+func SnakeCase(in string) string {
+	s := casePrepare(in)
+	return spaces.ReplaceAllString(s, "_")
+}
+
+// KebabCase -
+func KebabCase(in string) string {
+	s := casePrepare(in)
+	return spaces.ReplaceAllString(s, "-")
+}
+
+func casePrepare(in string) string {
+	in = strings.TrimSpace(in)
+	s := strings.ToLower(in)
+	// make sure the first letter remains lower- or upper-cased
+	s = strings.Replace(s, string(s[0]), string(in[0]), 1)
+	s = nonAlphaNum.ReplaceAllString(s, " ")
+	return strings.TrimSpace(s)
+}
+
+// CamelCase -
+func CamelCase(in string) string {
+	in = strings.TrimSpace(in)
+	s := strings.Title(in)
+	// make sure the first letter remains lower- or upper-cased
+	s = strings.Replace(s, string(s[0]), string(in[0]), 1)
+	return nonAlphaNum.ReplaceAllString(s, "")
+}
diff --git a/strings/strings_test.go b/strings/strings_test.go
index f2afb2f5..dfcee552 100644
--- a/strings/strings_test.go
+++ b/strings/strings_test.go
@@ -39,3 +39,18 @@ func TestSort(t *testing.T) {
 	expected = []string{"18", "42", "45"}
 	assert.EqualValues(t, expected, Sort(in))
 }
+
+func TestCaseFuncs(t *testing.T) {
+	testdata := []struct{ in, s, k, c string }{
+		{"  Foo bar ", "Foo_bar", "Foo-bar", "FooBar"},
+		{"foo  bar", "foo_bar", "foo-bar", "fooBar"},
+		{" baz\tqux  ", "baz_qux", "baz-qux", "bazQux"},
+		{"Hello, World!", "Hello_world", "Hello-world", "HelloWorld"},
+		{"grüne | Straße", "grüne_straße", "grüne-straße", "grüneStraße"},
+	}
+	for _, d := range testdata {
+		assert.Equal(t, d.s, SnakeCase(d.in))
+		assert.Equal(t, d.k, KebabCase(d.in))
+		assert.Equal(t, d.c, CamelCase(d.in))
+	}
+}