Added Permission evaluation for channels and EvaluatedPermissions class.

src/structures/EvaluatedPermissions.js

@@ -0,0 +1,39 @@
+'use strict';
+
+const Constants = require('../Util/Constants');
+
+class EvaluatedPermissions {
+	constructor(member, permissions) {
+		this.member = member;
+		this.permissions = permissions;
+	}
+
+	serialize() {
+		let serializedPermissions = {};
+		for (let permissionName in Constants.PermissionFlags) {
+			serializedPermissions[permissionName] = this.hasPermission(permissionName);
+		}
+
+		return serializedPermissions;
+	}
+
+	hasPermission(permission, explicit) {
+		if (permission instanceof String || typeof permission === 'string') {
+			permission = Constants.PermissionFlags[permission];
+		}
+
+		if (!permission) {
+			throw Constants.Errors.NOT_A_PERMISSION;
+		}
+
+		if (!explicit) {
+			if ((this.permissions & Constants.PermissionFlags.MANAGE_ROLES) > 0) {
+				return true;
+			}
+		}
+
+		return ((this.permissions & permission) > 0);
+	}
+}
+
+module.exports = EvaluatedPermissions;