Add support for guild region and verification level

restapi.go

@@ -372,13 +372,43 @@ func (s *Session) GuildCreate(name string) (st *Guild, err error) {
 // GuildEdit edits a new Guild
 // guildID   : The ID of a Guild
 // name      : A name for the Guild (2-100 characters)
-func (s *Session) GuildEdit(guildID, name string) (st *Guild, err error) {
+func (s *Session) GuildEdit(guildID string, g GuildParams) (st *Guild, err error) {
+
+	// Bounds checking for VerificationLevel, interval: [0, 3]
+	if g.VerificationLevel != nil {
+		val := *g.VerificationLevel
+		if val < 0 || val > 3 {
+			err = errors.New("VerificationLevel out of bounds, should be between 0 and 3")
+			return
+		}
+	}
+
+	//Bounds checking for regions
+	if g.Region != "" {
+		isValid := false
+		regions, _ := s.VoiceRegions()
+		for _, r := range regions {
+			if g.Region == r.ID {
+				isValid = true
+			}
+		}
+		if !isValid {
+			var valid []string
+			for _, r := range regions {
+				valid = append(valid, r.ID)
+			}
+			err = errors.New(fmt.Sprintf("Region not a valid region (%q)", valid))
+			return
+		}
+	}
 
 	data := struct {
-		Name string `json:"name"`
+		Name              string `json:"name,omitempty"`
-	}{name}
+		Region            string `json:"region,omitempty"`
+		VerificationLevel *int   `json:"verification_level,omitempty"`
+	}{g.Name, g.Region, g.VerificationLevel}
 
-	body, err := s.Request("POST", GUILD(guildID), data)
+	body, err := s.Request("PATCH", GUILD(guildID), data)
 	if err != nil {
 		return
 	}

structs.go

@@ -158,6 +158,7 @@ type Guild struct {
 	JoinedAt          string        `json:"joined_at"` // make this a timestamp
 	Splash            string        `json:"splash"`
 	AfkTimeout        int           `json:"afk_timeout"`
+	VerificationLevel int           `json:"verification_level"`
 	EmbedEnabled      bool          `json:"embed_enabled"`
 	Large             bool          `json:"large"` // ??
 	Roles             []*Role       `json:"roles"`
@@ -168,6 +169,13 @@ type Guild struct {
 	VoiceStates       []*VoiceState `json:"voice_states"`
 }
 
+// A GuildParams stores all the data needed to update discord guild settings
+type GuildParams struct {
+	Name              string `json:"name"`
+	Region            string `json:"region"`
+	VerificationLevel *int   `json:"verification_level"`
+}
+
 // A Role stores information about Discord guild member roles.
 type Role struct {
 	ID          string `json:"id"`