1 files changed, 45 insertions(+), 0 deletions(-)

A core/html.go

@@ 0,0 1,45 @@
+package core
+
+import (
+	"strings"
+	"unicode/utf8"
+)
+
+// StripHtmlTags helper function strip all <> tags from a string. For more
+// features/control use something like the bluemonday module.
+// Adapted from the following SO answer: https://stackoverflow.com/a/64701836
+func StripHtmlTags(blob string) string {
+	var (
+		builder      strings.Builder
+		htmlTagStart rune = 60 // Unicode `<`
+		htmlTagEnd   rune = 62 // Unicode `>`
+		start, end   int  = 0, 0
+		in           bool
+	)
+	builder.Grow(len(blob) + utf8.UTFMax)
+
+	for i, c := range blob {
+		if (i+1) == len(blob) && end >= start {
+			builder.WriteString(blob[end:])
+		}
+
+		if c != htmlTagStart && c != htmlTagEnd {
+			continue
+		}
+
+		if c == htmlTagStart {
+			// Only update the start if we are not in a tag.
+			// This make sure we strip out `<<br>` not just `<br>`
+			if !in {
+				start = i
+
+				builder.WriteString(blob[end:start])
+			}
+			in = true
+			continue
+		}
+		in = false
+		end = i + 1
+	}
+	return builder.String()
+}