120 lines
3 KiB
Go
120 lines
3 KiB
Go
package vk
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import (
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"errors"
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"log"
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"net/http"
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"strings"
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"github.com/gin-gonic/gin"
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)
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type Handler struct {
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Sender sender
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Logger *log.Logger
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SecretKey string
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GroupId int64
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ConfirmationString string
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DictPath string
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Cache cardCache
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InfoFetcher cardInfoFetcher
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}
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type cardInfoFetcher interface {
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GetFormattedCardPrices(name string) (string, error)
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GetNameByCardId(set string, number string) string
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GetOriginalName(name string) string
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}
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type cardCache interface {
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Get(cardName string) (string, error)
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Set(cardName string, message string)
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}
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type messageRequest struct {
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Type string `json:"type"`
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GroupId int64 `json:"group_id"`
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Object userMessage `json:"object"`
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Secret string `json:"secret"`
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}
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type userMessage struct {
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Body string `json:"text"`
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UserId int64 `json:"peer_id"`
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}
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const (
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incorrectMessage = "Некорректная команда"
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cardNotFoundMessage = "Карта не найдена"
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pricesUnavailableMessage = "Цены временно недоступны, попробуйте позже"
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)
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func (h *Handler) HandleMessage(c *gin.Context) {
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var req messageRequest
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_ = c.BindJSON(&req)
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if req.Secret != h.SecretKey {
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return
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}
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switch req.Type {
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case "confirmation":
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h.handleConfirmation(c, &req)
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case "message_new":
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go h.handleSearch(&req)
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c.String(http.StatusOK, "ok")
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}
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}
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func (h *Handler) handleSearch(req *messageRequest) {
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cardName, err := h.getCardNameByCommand(req.Object.Body)
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if err != nil {
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h.Sender.send(req.Object.UserId, incorrectMessage)
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h.Logger.Printf("[info] Not correct command. Message: %s user input: %s", err.Error(), req.Object.Body)
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} else if cardName == "" {
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h.Sender.send(req.Object.UserId, cardNotFoundMessage)
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h.Logger.Printf("[info] Could not find card. User input: %s", req.Object.Body)
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} else {
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message, err := h.getMessage(cardName)
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if err != nil {
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h.Sender.send(req.Object.UserId, pricesUnavailableMessage)
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h.Logger.Printf("[error] Could not find SCG prices. Message: %s card name: %s", err.Error(), cardName)
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return
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}
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h.Sender.send(req.Object.UserId, message)
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}
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}
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func (h *Handler) handleConfirmation(c *gin.Context, req *messageRequest) {
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if (req.Type == "confirmation") && (req.GroupId == h.GroupId) {
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c.String(http.StatusOK, h.ConfirmationString)
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}
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}
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func (h *Handler) getMessage(cardName string) (string, error) {
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val, err := h.Cache.Get(cardName)
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if err != nil {
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message, err := h.InfoFetcher.GetFormattedCardPrices(cardName)
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if err != nil {
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return "", err
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}
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h.Cache.Set(cardName, message)
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return message, nil
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}
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return val, nil
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}
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func (h *Handler) getCardNameByCommand(command string) (string, error) {
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var name string
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switch {
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case strings.HasPrefix(command, "!s"):
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split := strings.Split(command, " ")
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if len(split) < 3 {
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return "", errors.New("wrong command")
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}
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set := split[1]
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number := split[2]
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name = h.InfoFetcher.GetNameByCardId(set, number)
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default:
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name = h.InfoFetcher.GetOriginalName(command)
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}
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return name, nil
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}
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