export some extra entity functions that don't need to be methods

entities.go

@@ -7,46 +7,55 @@ type ParsedMessageEntity struct {
 	Text string `json:"text"`
 }
 
-// ParseEntities calls Message.ParseEntity on all message text entities.
-func (m Message) ParseEntities() (out []ParsedMessageEntity) {
-	return m.ParseEntityTypes(nil)
+// ParseEntity parses a single MessageEntity into a ParsedMessageEntity.
+func ParseEntity(text string, entity MessageEntity) ParsedMessageEntity {
+	return parseEntity(entity, utf16.Encode([]rune(text)))
 }
 
-// ParseCaptionEntities calls Message.ParseEntity on all message caption entities.
-func (m Message) ParseCaptionEntities() (out []ParsedMessageEntity) {
-	return m.ParseCaptionEntityTypes(nil)
+// ParseEntities parses all MessageEntity items into a list of ParsedMessageEntity.
+func ParseEntities(text string, entities []MessageEntity) (out []ParsedMessageEntity) {
+	return ParseEntityTypes(text, entities, nil)
 }
 
-// ParseEntityTypes calls Message.ParseEntity on a subset of message text entities.
-func (m Message) ParseEntityTypes(accepted map[string]struct{}) (out []ParsedMessageEntity) {
-	utf16Text := utf16.Encode([]rune(m.Text))
-	for _, ent := range m.Entities {
+// ParseEntityTypes parses a subset of MessageEntity items into a list of ParsedMessageEntity.
+func ParseEntityTypes(text string, entities []MessageEntity, accepted map[string]struct{}) (out []ParsedMessageEntity) {
+	utf16Text := utf16.Encode([]rune(text))
+	for _, ent := range entities {
 		if _, ok := accepted[ent.Type]; ok || accepted == nil {
 			out = append(out, parseEntity(ent, utf16Text))
 		}
 	}
 	return out
 }
 
-// ParseCaptionEntityTypes calls Message.ParseEntity on a subset of message caption entities.
+// ParseEntities parses all message text entities into a list of ParsedMessageEntity.
+func (m Message) ParseEntities() (out []ParsedMessageEntity) {
+	return m.ParseEntityTypes(nil)
+}
+
+// ParseCaptionEntities parses all message caption entities into a list of ParsedMessageEntity.
+func (m Message) ParseCaptionEntities() (out []ParsedMessageEntity) {
+	return m.ParseCaptionEntityTypes(nil)
+}
+
+// ParseEntityTypes parses a subset of message text entities into a list of ParsedMessageEntity.
+func (m Message) ParseEntityTypes(accepted map[string]struct{}) (out []ParsedMessageEntity) {
+	return ParseEntityTypes(m.Text, m.Entities, accepted)
+}
+
+// ParseCaptionEntityTypes parses a subset of message caption entities into a list of ParsedMessageEntity.
 func (m Message) ParseCaptionEntityTypes(accepted map[string]struct{}) (out []ParsedMessageEntity) {
-	utf16Caption := utf16.Encode([]rune(m.Caption))
-	for _, ent := range m.CaptionEntities {
-		if _, ok := accepted[ent.Type]; ok || accepted == nil {
-			out = append(out, parseEntity(ent, utf16Caption))
-		}
-	}
-	return out
+	return ParseEntityTypes(m.Caption, m.CaptionEntities, accepted)
 }
 
 // ParseEntity parses a single message text entity to populate text contents, URL, and offsets in UTF8.
 func (m Message) ParseEntity(entity MessageEntity) ParsedMessageEntity {
-	return parseEntity(entity, utf16.Encode([]rune(m.Text)))
+	return ParseEntity(m.Text, entity)
 }
 
 // ParseCaptionEntity parses a single message caption entity to populate text contents, URL, and offsets in UTF8.
 func (m Message) ParseCaptionEntity(entity MessageEntity) ParsedMessageEntity {
-	return parseEntity(entity, utf16.Encode([]rune(m.Caption)))
+	return ParseEntity(m.Caption, entity)
 }
 
 func parseEntity(entity MessageEntity, utf16Text []uint16) ParsedMessageEntity {