adds EndpointGuildIconAnimated; adds guild.IconURL() helper (#658)

endpoints.go

@@ -93,6 +93,7 @@ var (
 	EndpointGuildEmbed           = func(gID string) string { return EndpointGuilds + gID + "/embed" }
 	EndpointGuildPrune           = func(gID string) string { return EndpointGuilds + gID + "/prune" }
 	EndpointGuildIcon            = func(gID, hash string) string { return EndpointCDNIcons + gID + "/" + hash + ".png" }
+	EndpointGuildIconAnimated    = func(gID, hash string) string { return EndpointCDNIcons + gID + "/" + hash + ".gif" }
 	EndpointGuildSplash          = func(gID, hash string) string { return EndpointCDNSplashes + gID + "/" + hash + ".png" }
 	EndpointGuildWebhooks        = func(gID string) string { return EndpointGuilds + gID + "/webhooks" }
 	EndpointGuildAuditLogs       = func(gID string) string { return EndpointGuilds + gID + "/audit-logs" }

structs.go

@@ -15,6 +15,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/http"
+	"strings"
 	"sync"
 	"time"
 
@@ -475,6 +476,19 @@ type Guild struct {
 	PremiumSubscriptionCount int `json:"premium_subscription_count"`
 }
 
+// IconURL returns a URL to the guild's icon.
+func (g *Guild) IconURL() string {
+	if g.Icon == "" {
+		return ""
+	}
+
+	if strings.HasPrefix(g.Icon, "a_") {
+		return EndpointGuildIconAnimated(g.ID, g.Icon)
+	}
+
+	return EndpointGuildIcon(g.ID, g.Icon)
+}
+
 // A UserGuild holds a brief version of a Guild
 type UserGuild struct {
 	ID          string `json:"id"`