Add Slack support

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

@@ -0,0 +1,54 @@
+package slack
+
+import (
+	"errors"
+	"net/url"
+)
+
+type OAuthResponseIncomingWebhook struct {
+	URL              string `json:"url"`
+	Channel          string `json:"channel"`
+	ConfigurationURL string `json:"configuration_url"`
+}
+
+type OAuthResponseBot struct {
+	BotUserID      string `json:"bot_user_id"`
+	BotAccessToken string `json:"bot_access_token"`
+}
+
+type OAuthResponse struct {
+	AccessToken     string                       `json:"access_token"`
+	Scope           string                       `json:"scope"`
+	TeamName        string                       `json:"team_name"`
+	TeamID          string                       `json:"team_id"`
+	IncomingWebhook OAuthResponseIncomingWebhook `json:"incoming_webhook"`
+	Bot             OAuthResponseBot             `json:"bot"`
+	SlackResponse
+}
+
+// GetOAuthToken retrieves an AccessToken
+func GetOAuthToken(clientID, clientSecret, code, redirectURI string, debug bool) (accessToken string, scope string, err error) {
+	response, err := GetOAuthResponse(clientID, clientSecret, code, redirectURI, debug)
+	if err != nil {
+		return "", "", err
+	}
+	return response.AccessToken, response.Scope, nil
+}
+
+func GetOAuthResponse(clientID, clientSecret, code, redirectURI string, debug bool) (resp *OAuthResponse, err error) {
+	values := url.Values{
+		"client_id":     {clientID},
+		"client_secret": {clientSecret},
+		"code":          {code},
+		"redirect_uri":  {redirectURI},
+	}
+	response := &OAuthResponse{}
+	err = post("oauth.access", values, response, debug)
+	if err != nil {
+		return nil, err
+	}
+	if !response.Ok {
+		return nil, errors.New(response.Error)
+	}
+	return response, nil
+}