Refactor oauth params into a struct

_examples/oauth2/example.go

@@ -87,7 +87,11 @@ func handleRoot(w http.ResponseWriter, r *http.Request) {
 }
 
 func handleLogin(w http.ResponseWriter, r *http.Request) {
-	http.Redirect(w, r, client.GenerateAuthorizationURL(baseURL+"/trylogin", discord.PermissionsNone, 0, false, 0, discord.OAuth2ScopeIdentify, discord.OAuth2ScopeGuilds, discord.OAuth2ScopeEmail, discord.OAuth2ScopeConnections, discord.OAuth2ScopeWebhookIncoming), http.StatusSeeOther)
+	params := oauth2.AuthorizationURLParams{
+		RedirectURI: baseURL + "/trylogin",
+		Scopes:      []discord.OAuth2Scope{discord.OAuth2ScopeIdentify, discord.OAuth2ScopeGuilds, discord.OAuth2ScopeEmail, discord.OAuth2ScopeConnections, discord.OAuth2ScopeWebhookIncoming},
+	}
+	http.Redirect(w, r, client.GenerateAuthorizationURL(params), http.StatusSeeOther)
 }
 
 func handleTryLogin(w http.ResponseWriter, r *http.Request) {

_examples/verified_roles/main.go

@@ -52,7 +52,11 @@ func main() {
 }
 
 func handleVerify(w http.ResponseWriter, r *http.Request) {
-	http.Redirect(w, r, oAuth2Client.GenerateAuthorizationURL(baseURL+"/callback", discord.PermissionsNone, 0, false, 0, discord.OAuth2ScopeIdentify, discord.OAuth2ScopeRoleConnectionsWrite), http.StatusTemporaryRedirect)
+	params := oauth2.AuthorizationURLParams{
+		RedirectURI: baseURL + "/callback",
+		Scopes:      []discord.OAuth2Scope{discord.OAuth2ScopeIdentify, discord.OAuth2ScopeRoleConnectionsWrite},
+	}
+	http.Redirect(w, r, oAuth2Client.GenerateAuthorizationURL(params), http.StatusTemporaryRedirect)
 }
 
 func handleCallback(w http.ResponseWriter, r *http.Request) {

oauth2/client.go

@@ -46,6 +46,15 @@ func (s Session) Expired() bool {
 	return s.Expiration.Before(time.Now())
 }
 
+type AuthorizationURLParams struct {
+	RedirectURI        string
+	Permissions        discord.Permissions
+	GuildID            snowflake.ID
+	DisableGuildSelect bool
+	IntegrationType    discord.ApplicationIntegrationType
+	Scopes             []discord.OAuth2Scope
+}
+
 // Client is a high level wrapper around Discord's OAuth2 API.
 type Client interface {
 	// ID returns the configured client ID.
@@ -58,10 +67,10 @@ type Client interface {
 	// StateController returns the configured StateController.
 	StateController() StateController
 
-	// GenerateAuthorizationURL generates an authorization URL with the given redirect URI, permissions, guildID, disableGuildSelect, integrationType & scopes. State is automatically generated.
-	GenerateAuthorizationURL(redirectURI string, permissions discord.Permissions, guildID snowflake.ID, disableGuildSelect bool, integrationType discord.ApplicationIntegrationType, scopes ...discord.OAuth2Scope) string
-	// GenerateAuthorizationURLState generates an authorization URL with the given redirect URI, permissions, guildID, disableGuildSelect, integrationType & scopes. State is automatically generated & returned.
-	GenerateAuthorizationURLState(redirectURI string, permissions discord.Permissions, guildID snowflake.ID, disableGuildSelect bool, integrationType discord.ApplicationIntegrationType, scopes ...discord.OAuth2Scope) (string, string)
+	// GenerateAuthorizationURL generates an authorization URL with the given authorization params. State is automatically generated.
+	GenerateAuthorizationURL(params AuthorizationURLParams) string
+	// GenerateAuthorizationURLState generates an authorization URL with the given authorization params. State is automatically generated & returned.
+	GenerateAuthorizationURLState(params AuthorizationURLParams) (string, string)
 
 	// StartSession starts a new Session with the given authorization code & state.
 	StartSession(code string, state string, opts ...rest.RequestOpt) (Session, *discord.IncomingWebhook, error)

oauth2/client_impl.go

@@ -47,32 +47,32 @@ func (c *clientImpl) StateController() StateController {
 	return c.stateController
 }
 
-func (c *clientImpl) GenerateAuthorizationURL(redirectURI string, permissions discord.Permissions, guildID snowflake.ID, disableGuildSelect bool, integrationType discord.ApplicationIntegrationType, scopes ...discord.OAuth2Scope) string {
-	authURL, _ := c.GenerateAuthorizationURLState(redirectURI, permissions, guildID, disableGuildSelect, integrationType, scopes...)
+func (c *clientImpl) GenerateAuthorizationURL(params AuthorizationURLParams) string {
+	authURL, _ := c.GenerateAuthorizationURLState(params)
 	return authURL
 }
 
-func (c *clientImpl) GenerateAuthorizationURLState(redirectURI string, permissions discord.Permissions, guildID snowflake.ID, disableGuildSelect bool, integrationType discord.ApplicationIntegrationType, scopes ...discord.OAuth2Scope) (string, string) {
-	state := c.StateController().NewState(redirectURI)
+func (c *clientImpl) GenerateAuthorizationURLState(params AuthorizationURLParams) (string, string) {
+	state := c.StateController().NewState(params.RedirectURI)
 	values := discord.QueryValues{
 		"client_id":     c.id,
-		"redirect_uri":  redirectURI,
+		"redirect_uri":  params.RedirectURI,
 		"response_type": "code",
-		"scope":         discord.JoinScopes(scopes),
+		"scope":         discord.JoinScopes(params.Scopes),
 		"state":         state,
 	}
 
-	if permissions != discord.PermissionsNone {
-		values["permissions"] = permissions
+	if params.Permissions != discord.PermissionsNone {
+		values["permissions"] = params.Permissions
 	}
-	if guildID != 0 {
-		values["guild_id"] = guildID
+	if params.GuildID != 0 {
+		values["guild_id"] = params.GuildID
 	}
-	if disableGuildSelect {
+	if params.DisableGuildSelect {
 		values["disable_guild_select"] = true
 	}
-	if integrationType != 0 {
-		values["integration_type"] = integrationType
+	if params.IntegrationType != 0 {
+		values["integration_type"] = params.IntegrationType
 	}
 	return discord.AuthorizeURL(values), state
 }