Discord: Added a helper HasFlag function

discord/discord.go

@@ -2,3 +2,10 @@
 // does not (and should not) contain API-specific structures, or WS-specific
 // structures.
 package discord
+
+// HasFlag is returns true if has is in the flag. In other words, it checks if
+// has is OR'd into flag. This function could be used for different constants
+// such as Permission.
+func HasFlag(flag, has uint64) bool {
+	return flag&has == has
+}

discord/message.go

@@ -81,7 +81,7 @@ const (
 	GuildDiscoveryRequalifiedMessage
 )
 
-type MessageFlags uint8
+type MessageFlags uint32
 
 const (
 	CrosspostedMessage MessageFlags = 1 << iota

discord/permission.go

@@ -111,7 +111,7 @@ const (
 )
 
 func (p Permissions) Has(perm Permissions) bool {
-	return (p & perm) == perm
+	return HasFlag(uint64(p), uint64(perm))
 }
 
 func (p Permissions) Add(perm Permissions) Permissions {

discord/user.go

@@ -155,7 +155,7 @@ const (
 	CustomActivity
 )
 
-type ActivityFlags uint8
+type ActivityFlags uint32
 
 const (
 	InstanceActivity ActivityFlags = 1 << iota