telebot/inline.go
2016-11-10 22:10:37 +02:00

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package telebot
import (
"encoding/json"
"fmt"
"hash/fnv"
"strconv"
"github.com/mitchellh/hashstructure"
)
// inlineQueryHashOptions sets the HashOptions to be used when hashing
// an inline query result (used to generate IDs).
var inlineQueryHashOptions = &hashstructure.HashOptions{
Hasher: fnv.New64(),
}
// Query is an incoming inline query. When the user sends
// an empty query, your bot could return some default or
// trending results.
type Query struct {
// Unique identifier for this query.
ID string `json:"id"`
// Sender.
From User `json:"from"`
// (Optional) Sender location, only for bots that request user location.
Location Location `json:"location"`
// Text of the query (up to 512 characters).
Text string `json:"query"`
// Offset of the results to be returned, can be controlled by the bot.
Offset string `json:"offset"`
}
// QueryResponse builds a response to an inline Query.
// See also: https://core.telegram.org/bots/api#answerinlinequery
type QueryResponse struct {
// The ID of the query to which this is a response.
// It is not necessary to specify this field manually.
QueryID string `json:"inline_query_id"`
// The results for the inline query.
Results InlineQueryResults `json:"results"`
// (Optional) The maximum amount of time in seconds that the result
// of the inline query may be cached on the server.
CacheTime int `json:"cache_time,omitempty"`
// (Optional) Pass True, if results may be cached on the server side
// only for the user that sent the query. By default, results may
// be returned to any user who sends the same query.
IsPersonal bool `json:"is_personal"`
// (Optional) Pass the offset that a client should send in the next
// query with the same text to receive more results. Pass an empty
// string if there are no more results or if you dont support
// pagination. Offset length cant exceed 64 bytes.
NextOffset string `json:"next_offset"`
// (Optional) If passed, clients will display a button with specified
// text that switches the user to a private chat with the bot and sends
// the bot a start message with the parameter switch_pm_parameter.
SwitchPMText string `json:"switch_pm_text,omitempty"`
// (Optional) Parameter for the start message sent to the bot when user
// presses the switch button.
SwitchPMParameter string `json:"switch_pm_parameter,omitempty"`
}
// InlineQueryResult represents one result of an inline query.
type InlineQueryResult interface {
GetID() string
SetID(string)
}
// InlineQueryResults is a slice wrapper for convenient marshalling.
type InlineQueryResults []InlineQueryResult
// MarshalJSON makes sure IQRs have proper IDs and Type variables set.
//
// If ID of some result appears empty, it gets set to a new hash.
// JSON-specific Type gets infered from the actual (specific) IQR type.
func (results *InlineQueryResults) MarshalJSON() ([]byte, error) {
for i, result := range *results {
if result.GetID() == "" {
hash, err := hashstructure.Hash(result, inlineQueryHashOptions)
if err != nil {
return nil, fmt.Errorf("telebot: can't hash IQR #%d: %s",
i, err)
}
result.SetID(strconv.FormatUint(hash, 16))
}
if err := inferIQR(result); err != nil {
return nil, fmt.Errorf("telebot: can't infer type of IQR #%d: %s",
i, err)
}
}
return json.Marshal([]InlineQueryResult(*results))
}
func inferIQR(result InlineQueryResult) error {
switch r := result.(type) {
case *InlineQueryResultArticle:
r.Type = "article"
case *InlineQueryResultAudio:
r.Type = "audio"
case *InlineQueryResultContact:
r.Type = "contact"
case *InlineQueryResultDocument:
r.Type = "document"
case *InlineQueryResultGif:
r.Type = "gif"
case *InlineQueryResultLocation:
r.Type = "location"
case *InlineQueryResultMpeg4Gif:
r.Type = "mpeg4_gif"
case *InlineQueryResultPhoto:
r.Type = "photo"
case *InlineQueryResultVenue:
r.Type = "venue"
case *InlineQueryResultVideo:
r.Type = "video"
case *InlineQueryResultVoice:
r.Type = "voice"
default:
return fmt.Errorf("%T is not an IQR", result)
}
return nil
}
// Result is a deprecated type, superseded by InlineQueryResult.
type Result interface {
MarshalJSON() ([]byte, error)
}