Add params from develop branch, config for poll

configs.go

@@ -72,6 +72,18 @@ type BaseChat struct {
 	DisableNotification bool
 }
 
+func (chat *BaseChat) params() (Params, error) {
+	params := make(Params)
+
+	params.AddFirstValid("chat_id", chat.ChatID, chat.ChannelUsername)
+	params.AddNonZero("reply_to_message_id", chat.ReplyToMessageID)
+	params.AddBool("disable_notification", chat.DisableNotification)
+
+	err := params.AddInterface("reply_markup", chat.ReplyMarkup)
+
+	return params, err
+}
+
 // values returns url.Values representation of BaseChat
 func (chat *BaseChat) values() (url.Values, error) {
 	v := url.Values{}
@@ -765,6 +777,47 @@ func (config ContactConfig) method() string {
 	return "sendContact"
 }
 
+// SendPollConfig allows you to send a poll.
+type SendPollConfig struct {
+	BaseChat
+	Question              string
+	Options               []string
+	IsAnonymous           bool
+	Type                  string
+	AllowsMultipleAnswers bool
+	CorrectOptionID       int64
+	Explanation           string
+	ExplanationParseMode  string
+	OpenPeriod            int
+	CloseDate             int
+	IsClosed              bool
+}
+
+func (config SendPollConfig) values() (url.Values, error) {
+	params, err := config.BaseChat.params()
+	if err != nil {
+		return params.toValues(), err
+	}
+
+	params["question"] = config.Question
+	err = params.AddInterface("options", config.Options)
+	params["is_anonymous"] = strconv.FormatBool(config.IsAnonymous)
+	params.AddNonEmpty("type", config.Type)
+	params["allows_multiple_answers"] = strconv.FormatBool(config.AllowsMultipleAnswers)
+	params["correct_option_id"] = strconv.FormatInt(config.CorrectOptionID, 10)
+	params.AddBool("is_closed", config.IsClosed)
+	params.AddNonEmpty("explanation", config.Explanation)
+	params.AddNonEmpty("explanation_parse_mode", config.ExplanationParseMode)
+	params.AddNonZero("open_period", config.OpenPeriod)
+	params.AddNonZero("close_date", config.CloseDate)
+
+	return params.toValues(), err
+}
+
+func (SendPollConfig) method() string {
+	return "sendPoll"
+}
+
 // GameConfig allows you to send a game.
 type GameConfig struct {
 	BaseChat

params.go

@@ -0,0 +1,116 @@
+package tgbotapi
+
+import (
+	"encoding/json"
+	"net/url"
+	"reflect"
+	"strconv"
+)
+
+// Params represents a set of parameters that gets passed to a request.
+type Params map[string]string
+
+func newParams(values url.Values) Params {
+	params := Params{}
+	for k, v := range values {
+		if len(v) > 0 {
+			params[k] = v[0]
+		}
+	}
+	return params
+}
+
+func (p Params) toValues() url.Values {
+	values := url.Values{}
+	for k, v := range p {
+		values[k] = []string{v}
+	}
+	return values
+}
+
+// AddNonEmpty adds a value if it not an empty string.
+func (p Params) AddNonEmpty(key, value string) {
+	if value != "" {
+		p[key] = value
+	}
+}
+
+// AddNonZero adds a value if it is not zero.
+func (p Params) AddNonZero(key string, value int) {
+	if value != 0 {
+		p[key] = strconv.Itoa(value)
+	}
+}
+
+// AddNonZero64 is the same as AddNonZero except uses an int64.
+func (p Params) AddNonZero64(key string, value int64) {
+	if value != 0 {
+		p[key] = strconv.FormatInt(value, 10)
+	}
+}
+
+// AddBool adds a value of a bool if it is true.
+func (p Params) AddBool(key string, value bool) {
+	if value {
+		p[key] = strconv.FormatBool(value)
+	}
+}
+
+// AddNonZeroFloat adds a floating point value that is not zero.
+func (p Params) AddNonZeroFloat(key string, value float64) {
+	if value != 0 {
+		p[key] = strconv.FormatFloat(value, 'f', 6, 64)
+	}
+}
+
+// AddInterface adds an interface if it is not nill and can be JSON marshalled.
+func (p Params) AddInterface(key string, value interface{}) error {
+	if value == nil || (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) {
+		return nil
+	}
+
+	b, err := json.Marshal(value)
+	if err != nil {
+		return err
+	}
+
+	p[key] = string(b)
+
+	return nil
+}
+
+// AddFirstValid attempts to add the first item that is not a default value.
+//
+// For example, AddFirstValid(0, "", "test") would add "test".
+func (p Params) AddFirstValid(key string, args ...interface{}) error {
+	for _, arg := range args {
+		switch v := arg.(type) {
+		case int:
+			if v != 0 {
+				p[key] = strconv.Itoa(v)
+				return nil
+			}
+		case int64:
+			if v != 0 {
+				p[key] = strconv.FormatInt(v, 10)
+				return nil
+			}
+		case string:
+			if v != "" {
+				p[key] = v
+				return nil
+			}
+		case nil:
+		default:
+			b, err := json.Marshal(arg)
+			if err != nil {
+				return err
+			}
+
+			p[key] = string(b)
+			return nil
+		}
+	}
+
+	return nil
+}