Update nlopes/slack vendor

vendor/github.com/nlopes/slack/slash.go

@@ -0,0 +1,53 @@
+package slack
+
+import (
+	"net/http"
+)
+
+// SlashCommand contains information about a request of the slash command
+type SlashCommand struct {
+	Token          string `json:"token"`
+	TeamID         string `json:"team_id"`
+	TeamDomain     string `json:"team_domain"`
+	EnterpriseID   string `json:"enterprise_id,omitempty"`
+	EnterpriseName string `json:"enterprise_name,omitempty"`
+	ChannelID      string `json:"channel_id"`
+	ChannelName    string `json:"channel_name"`
+	UserID         string `json:"user_id"`
+	UserName       string `json:"user_name"`
+	Command        string `json:"command"`
+	Text           string `json:"text"`
+	ResponseURL    string `json:"response_url"`
+	TriggerID      string `json:"trigger_id"`
+}
+
+// SlashCommandParse will parse the request of the slash command
+func SlashCommandParse(r *http.Request) (s SlashCommand, err error) {
+	if err = r.ParseForm(); err != nil {
+		return s, err
+	}
+	s.Token = r.PostForm.Get("token")
+	s.TeamID = r.PostForm.Get("team_id")
+	s.TeamDomain = r.PostForm.Get("team_domain")
+	s.EnterpriseID = r.PostForm.Get("enterprise_id")
+	s.EnterpriseName = r.PostForm.Get("enterprise_name")
+	s.ChannelID = r.PostForm.Get("channel_id")
+	s.ChannelName = r.PostForm.Get("channel_name")
+	s.UserID = r.PostForm.Get("user_id")
+	s.UserName = r.PostForm.Get("user_name")
+	s.Command = r.PostForm.Get("command")
+	s.Text = r.PostForm.Get("text")
+	s.ResponseURL = r.PostForm.Get("response_url")
+	s.TriggerID = r.PostForm.Get("trigger_id")
+	return s, nil
+}
+
+// ValidateToken validates verificationTokens
+func (s SlashCommand) ValidateToken(verificationTokens ...string) bool {
+	for _, token := range verificationTokens {
+		if s.Token == token {
+			return true
+		}
+	}
+	return false
+}