added strikethrough and monspace text styling options

see #382

src/utils/textstyleparser.go

@@ -8,6 +8,8 @@ const (
 	Normal string = "NORMAL"
 	Bold          = "BOLD"
 	Italic        = "ITALIC"
+	Monospace     = "MONOSPACE"
+	Strikethrough = "STRIKETHROUGH"
 )
 
 const (
@@ -17,13 +19,17 @@ const (
 	BoldBegin          = 3
 	BoldEnd1           = 4
 	BoldEnd2           = 5
+	MonoSpaceBegin     = 6
+	MonoSpaceEnd       = 7
+	StrikethroughBegin = 8
+	StrikethroughEnd   = 9
 )
 
 func ParseMarkdownMessage(message string) (string, []string) {
 	textFormat := Normal
 	textFormatBegin := 0
 	textFormatLength := 0
-	numOfAsterisks := 0
+	numOfControlChars := 0
 	state := None
 	signalCliFormatStrings := []string{}
 	fullString := ""
@@ -37,7 +43,7 @@ func ParseMarkdownMessage(message string) (string, []string) {
 				if lastChar == "*" {
 					state = BoldBegin
 					textFormat = Bold
-					textFormatBegin = i - numOfAsterisks
+					textFormatBegin = i - numOfControlChars
 					textFormatLength = 0
 				} else {
 					state = ItalicEnd
@@ -45,21 +51,41 @@ func ParseMarkdownMessage(message string) (string, []string) {
 			} else if state == None {
 				state = ItalicBegin
 				textFormat = Italic
-				textFormatBegin = i - numOfAsterisks
+				textFormatBegin = i - numOfControlChars
 				textFormatLength = 0
 			} else if state == BoldBegin {
 				state = BoldEnd1
 			} else if state == BoldEnd1 {
 				state = BoldEnd2
 			}
-			numOfAsterisks += 1
+			numOfControlChars += 1
+		} else if v == '`' {
+			if state == None {
+				state = MonoSpaceBegin
+				textFormat = Monospace
+				textFormatBegin = i - numOfControlChars
+				textFormatLength = 0
+			} else if state == MonoSpaceBegin {
+				state = MonoSpaceEnd
+			}
+			numOfControlChars += 1
+		} else if v == '~' {
+			if state == None {
+				state = StrikethroughBegin
+				textFormat = Strikethrough
+				textFormatBegin = i - numOfControlChars
+				textFormatLength = 0
+			} else if state == StrikethroughBegin {
+				state = StrikethroughEnd
+			}
+			numOfControlChars += 1
 		} else {
 			textFormatLength += 1
 			fullString += string(v)
 		}
 		lastChar = string(v)
 
-		if state == ItalicEnd || state == BoldEnd2 {
+		if state == ItalicEnd || state == BoldEnd2 || state == MonoSpaceEnd || state == StrikethroughEnd {
 			signalCliFormatStrings = append(signalCliFormatStrings, strconv.Itoa(textFormatBegin)+":"+strconv.Itoa(textFormatLength)+":"+textFormat)
 			state = None
 			textFormatBegin = 0

src/utils/textstyleparser_test.go

@@ -38,3 +38,15 @@ func TestTwoBoldFormattedStrings(t *testing.T) {
 	expectMessageEqual(t, message, "This is a bold and another bold message")
 	expectFormatStringsEqual(t, signalCliFormatStrings, []string{"10:4:BOLD", "27:4:BOLD"})
 }
+
+func TestStrikethrough(t *testing.T) {
+	message, signalCliFormatStrings := ParseMarkdownMessage("This is a ~strikethrough~ and a **bold** message")
+	expectMessageEqual(t, message, "This is a strikethrough and a bold message")
+	expectFormatStringsEqual(t, signalCliFormatStrings, []string{"10:13:STRIKETHROUGH", "30:4:BOLD"})
+}
+
+func TestMonospace(t *testing.T) {
+	message, signalCliFormatStrings := ParseMarkdownMessage("This is a `monospace` and a **bold** message")
+	expectMessageEqual(t, message, "This is a monospace and a bold message")
+	expectFormatStringsEqual(t, signalCliFormatStrings, []string{"10:9:MONOSPACE", "26:4:BOLD"})
+}