Adding upstream version 0.8.9.

Signed-off-by: Daniel Baumann <daniel@debian.org>

pkg/format/enum_formatter.go

@@ -0,0 +1,71 @@
+package format
+
+import (
+	"strings"
+
+	"github.com/nicholas-fedor/shoutrrr/pkg/types"
+)
+
+// EnumInvalid is the constant value that an enum gets assigned when it could not be parsed.
+const EnumInvalid = -1
+
+// EnumFormatter is the helper methods for enum-like types.
+type EnumFormatter struct {
+	names       []string
+	firstOffset int
+	aliases     map[string]int
+}
+
+// Names is the list of the valid Enum string values.
+func (ef EnumFormatter) Names() []string {
+	return ef.names[ef.firstOffset:]
+}
+
+// Print takes a enum mapped int and returns it's string representation or "Invalid".
+func (ef EnumFormatter) Print(e int) string {
+	if e >= len(ef.names) || e < 0 {
+		return "Invalid"
+	}
+
+	return ef.names[e]
+}
+
+// Parse takes an enum mapped string and returns it's int representation or EnumInvalid (-1).
+func (ef EnumFormatter) Parse(mappedString string) int {
+	target := strings.ToLower(mappedString)
+	for index, name := range ef.names {
+		if target == strings.ToLower(name) {
+			return index
+		}
+	}
+
+	if index, found := ef.aliases[mappedString]; found {
+		return index
+	}
+
+	return EnumInvalid
+}
+
+// CreateEnumFormatter creates a EnumFormatter struct.
+func CreateEnumFormatter(names []string, optAliases ...map[string]int) types.EnumFormatter {
+	aliases := map[string]int{}
+	if len(optAliases) > 0 {
+		aliases = optAliases[0]
+	}
+
+	firstOffset := 0
+
+	for i, name := range names {
+		if name != "" {
+			firstOffset = i
+
+			break
+		}
+	}
+
+	return &EnumFormatter{
+		names,
+		firstOffset,
+		aliases,
+	}
+}