adding a generator for custom post content types, slug for url based on title, main file to manage commands

1 files changed, 68 insertions, 0 deletions

diff --git a/management/manager/process.go b/management/manager/process.go
new file mode 100644
index 0000000..ddae024
--- /dev/null
+++ b/management/manager/process.go
@@ -0,0 +1,68 @@
+package manager
+
+import (
+	"regexp"
+	"strings"
+	"unicode"
+
+	"github.com/nilslice/cms/management/editor"
+	"golang.org/x/text/transform"
+	"golang.org/x/text/unicode/norm"
+)
+
+// Slug returns a URL friendly string from the title of a post item
+func Slug(e editor.Editable) (string, error) {
+	// get the name of the post item
+	name := e.ContentName()
+
+	// filter out non-alphanumeric character or non-whitespace
+	slug, err := stringToSlug(name)
+	if err != nil {
+		return "", err
+	}
+
+	return slug, nil
+}
+
+func isMn(r rune) bool {
+	return unicode.Is(unicode.Mn, r) // Mn: nonspacing marks
+}
+
+// modified version of: https://www.socketloop.com/tutorials/golang-format-strings-to-seo-friendly-url-example
+func stringToSlug(s string) (string, error) {
+	src := []byte(strings.ToLower(s))
+
+	// convert all spaces to dash
+	rx := regexp.MustCompile("[[:space:]]")
+	src = rx.ReplaceAll(src, []byte("-"))
+
+	// remove all blanks such as tab
+	rx = regexp.MustCompile("[[:blank:]]")
+	src = rx.ReplaceAll(src, []byte(""))
+
+	rx = regexp.MustCompile("[!/:-@[-`{-~]")
+	src = rx.ReplaceAll(src, []byte(""))
+
+	rx = regexp.MustCompile("/[^\x20-\x7F]/")
+	src = rx.ReplaceAll(src, []byte(""))
+
+	rx = regexp.MustCompile("`&(amp;)?#?[a-z0-9]+;`i")
+	src = rx.ReplaceAll(src, []byte("-"))
+
+	rx = regexp.MustCompile("`&([a-z])(acute|uml|circ|grave|ring|cedil|slash|tilde|caron|lig|quot|rsquo);`i")
+	src = rx.ReplaceAll(src, []byte("\\1"))
+
+	rx = regexp.MustCompile("`[^a-z0-9]`i")
+	src = rx.ReplaceAll(src, []byte("-"))
+
+	rx = regexp.MustCompile("`[-]+`")
+	src = rx.ReplaceAll(src, []byte("-"))
+
+	t := transform.Chain(norm.NFD, transform.RemoveFunc(isMn), norm.NFC)
+	slug, _, err := transform.String(t, string(src))
+	if err != nil {
+		return "", err
+	}
+
+	return strings.TrimSpace(slug), nil
+}