93 lines
2.5 KiB
TypeScript
93 lines
2.5 KiB
TypeScript
import { type PermissionListType, type PermissionValueType } from './type';
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import {
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PermissionList,
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NullPermission,
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OwnerPermissionVal,
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ManagePermissionVal
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} from './constant';
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export type PerConstructPros = {
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per?: PermissionValueType;
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isOwner?: boolean;
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permissionList?: PermissionListType;
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childUpdatePermissionCallback?: () => void;
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};
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// the Permission helper class
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export class Permission {
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value: PermissionValueType;
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isOwner: boolean = false;
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hasManagePer: boolean = false;
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hasWritePer: boolean = false;
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hasReadPer: boolean = false;
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_permissionList: PermissionListType;
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constructor(props?: PerConstructPros) {
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const { per = NullPermission, isOwner = false, permissionList = PermissionList } = props || {};
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if (isOwner) {
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this.value = OwnerPermissionVal;
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} else {
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this.value = per;
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}
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this._permissionList = permissionList;
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this.updatePermissions();
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}
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// add permission(s)
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// it can be chaining called.
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// @example
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// const perm = new Permission(permission)
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// perm.add(PermissionList['read'])
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// perm.add(PermissionList['read'], PermissionList['write'])
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// perm.add(PermissionList['read']).add(PermissionList['write'])
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addPer(...perList: PermissionValueType[]) {
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if (this.isOwner) {
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return this;
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}
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for (const per of perList) {
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this.value = this.value | per;
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}
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this.updatePermissions();
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return this;
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}
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removePer(...perList: PermissionValueType[]) {
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if (this.isOwner) {
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return this.value;
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}
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for (const per of perList) {
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this.value = this.value & ~per;
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}
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this.updatePermissions();
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return this;
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}
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checkPer(perm: PermissionValueType): boolean {
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// if the permission is owner permission, only owner has this permission.
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if (perm === OwnerPermissionVal) {
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return this.value === OwnerPermissionVal;
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}
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return (this.value & perm) === perm;
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}
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private updatePermissionCallback?: () => void;
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setUpdatePermissionCallback(callback: () => void) {
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callback();
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this.updatePermissionCallback = callback;
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}
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private updatePermissions() {
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this.isOwner = this.value === OwnerPermissionVal;
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this.hasManagePer = this.checkPer(this._permissionList['manage'].value);
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this.hasWritePer = this.checkPer(this._permissionList['write'].value);
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this.hasReadPer = this.checkPer(this._permissionList['read'].value);
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this.updatePermissionCallback?.();
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}
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toBinary() {
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return this.value.toString(2);
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}
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}
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