From a7e8c337dbc16602d3a0f7e9061041be9ce521a7 Mon Sep 17 00:00:00 2001
From: Sasha Koshka <sashakoshka@tebibyte.media>
Date: Thu, 12 Dec 2024 00:26:22 -0500
Subject: [PATCH] providers/strings: Add string functions provider

---
 providers/strings/strings.go | 73 ++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 providers/strings/strings.go

diff --git a/providers/strings/strings.go b/providers/strings/strings.go
new file mode 100644
index 0000000..e056d42
--- /dev/null
+++ b/providers/strings/strings.go
@@ -0,0 +1,73 @@
+package strings
+
+import "strings"
+import "unicode"
+import "html/template"
+import "git.tebibyte.media/sashakoshka/step"
+
+var _ step.FuncProvider = new(Provider)
+
+// Provider provides string functions.
+type Provider struct {
+	
+}
+
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "strings"
+}
+
+// FuncMap fulfills the step.FuncProvider interface.
+func (this *Provider) FuncMap () template.FuncMap {
+	return template.FuncMap {
+		"strip":              funcStrip,
+		"stripAny":           funcStripAny,
+		"stripNonLetters":    funcStripNonLetters,
+		"stripNonPrintables": funcStripNonPrintables,
+		"stripSlashes":       funcStripSlashes,
+	}
+}
+
+func funcStrip (input string) string {
+	output := strings.Builder { }
+	for _, run := range input {
+		if !unicode.IsSpace(run) {
+			output.WriteRune(run)
+		}
+	}
+	return output.String()
+}
+
+func funcStripAny (chars, input string) string {
+	output := strings.Builder { }
+	for _, run := range input {
+		if strings.IndexRune(chars, run) < 0 {
+			output.WriteRune(run)
+		}
+	}
+	return output.String()
+}
+
+func funcStripNonLetters (input string) string {
+	output := strings.Builder { }
+	for _, run := range input {
+		if unicode.IsLetter(run) {
+			output.WriteRune(run)
+		}
+	}
+	return output.String()
+}
+
+func funcStripNonPrintables (input string) string {
+	output := strings.Builder { }
+	for _, run := range input {
+		if unicode.IsPrint(run) {
+			output.WriteRune(run)
+		}
+	}
+	return output.String()
+}
+
+func funcStripSlashes (input string) string {
+	return strings.ReplaceAll(input, "/", "")
+}