1 files changed, 32 insertions, 0 deletions
diff --git a/dist/util/Permissions.js b/dist/util/Permissions.js
index b594ff89..0686e273 100644
--- a/dist/util/Permissions.js
+++ b/dist/util/Permissions.js
@@ -14,6 +14,38 @@ class Permissions extends BitField_1.BitField {
     has(permission, checkAdmin = true) {
         return (checkAdmin && super.has(Permissions.FLAGS.ADMINISTRATOR)) || super.has(permission);
     }
+    static channelPermission(overwrites, init) {
+        // channelOverwrites.filter((x) => x.type === 1 && x.id !== user.id);
+        return overwrites.reduce((permission, overwrite) => {
+            // apply disallowed permission
+            // * permission: current calculated permission (e.g. 010)
+            // * deny contains all denied permissions (e.g. 011)
+            // * allow contains all explicitly allowed permisions (e.g. 100)
+            return (permission & ~overwrite.deny) | overwrite.allow;
+            // ~ operator inverts deny (e.g. 011 -> 100)
+            // & operator only allows 1 for both ~deny and permission (e.g. 010 & 100 -> 000)
+            // | operators adds both together (e.g. 000 + 100 -> 100)
+        }, 0n ?? init);
+    }
+    static rolePermission(roles) {
+        // adds all permissions of all roles together (Bit OR)
+        return roles.reduce((permission, role) => permission | role.permissions, 0n);
+    }
+    static finalPermission({ user, guild, channel, }) {
+        let roles = guild.roles.filter((x) => user.roles.includes(x.id));
+        let permission = Permissions.rolePermission(roles);
+        if (channel?.overwrites) {
+            let overwrites = channel.overwrites.filter((x) => {
+                if (x.type === 0 && user.roles.includes(x.id))
+                    return true;
+                if (x.type === 1 && x.id == user.id)
+                    return true;
+                return false;
+            });
+            permission = Permissions.channelPermission(overwrites, permission);
+        }
+        return permission;
+    }
 }
 exports.Permissions = Permissions;
 Permissions.FLAGS = {