1 files changed, 100 insertions, 0 deletions
diff --git a/funcs/strings.go b/funcs/strings.go
new file mode 100644
index 00000000..b78fe40c
--- /dev/null
+++ b/funcs/strings.go
@@ -0,0 +1,100 @@
+package funcs
+
+// Namespace strings contains mostly wrappers of equivalently-named
+// functions in the standard library `strings` package, with
+// differences in argument order where it makes pipelining
+// in templates easier.
+
+import (
+	"sync"
+
+	"strings"
+)
+
+var (
+	strNS     *StringFuncs
+	strNSInit sync.Once
+)
+
+// StrNS -
+func StrNS() *StringFuncs {
+	strNSInit.Do(func() { strNS = &StringFuncs{} })
+	return strNS
+}
+
+// AddStringFuncs -
+func AddStringFuncs(f map[string]interface{}) {
+	f["strings"] = StrNS
+
+	f["replaceAll"] = StrNS().ReplaceAll
+	f["title"] = StrNS().Title
+	f["toUpper"] = StrNS().ToUpper
+	f["toLower"] = StrNS().ToLower
+	f["trimSpace"] = StrNS().TrimSpace
+
+	// these are legacy aliases with non-pipelinable arg order
+	f["contains"] = strings.Contains
+	f["hasPrefix"] = strings.HasPrefix
+	f["hasSuffix"] = strings.HasSuffix
+	f["split"] = strings.Split
+	f["splitN"] = strings.SplitN
+	f["trim"] = strings.Trim
+}
+
+// StringFuncs -
+type StringFuncs struct{}
+
+// ReplaceAll -
+func (f *StringFuncs) ReplaceAll(old, new, s string) string {
+	return strings.Replace(s, old, new, -1)
+}
+
+// Contains -
+func (f *StringFuncs) Contains(substr, s string) bool {
+	return strings.Contains(s, substr)
+}
+
+// HasPrefix -
+func (f *StringFuncs) HasPrefix(prefix, s string) bool {
+	return strings.HasPrefix(s, prefix)
+}
+
+// HasSuffix -
+func (f *StringFuncs) HasSuffix(suffix, s string) bool {
+	return strings.HasSuffix(s, suffix)
+}
+
+// Split -
+func (f *StringFuncs) Split(sep, s string) []string {
+	return strings.Split(s, sep)
+}
+
+// SplitN -
+func (f *StringFuncs) SplitN(sep string, n int, s string) []string {
+	return strings.SplitN(s, sep, n)
+}
+
+// Trim -
+func (f *StringFuncs) Trim(cutset, s string) string {
+	return strings.Trim(s, cutset)
+}
+
+// Title -
+func (f *StringFuncs) Title(s string) string {
+	return strings.Title(s)
+}
+
+// ToUpper -
+func (f *StringFuncs) ToUpper(s string) string {
+	return strings.ToUpper(s)
+}
+
+// ToLower -
+func (f *StringFuncs) ToLower(s string) string {
+	return strings.ToLower(s)
+}
+
+// TrimSpace -
+func (f *StringFuncs) TrimSpace(s string) string {
+	return strings.TrimSpace(s)
+}