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@plarner30
Created October 19, 2020 11:51
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permission attribute
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Dumber Gist</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1.0, user-scalable=no">
<base href="/">
</head>
<!--
Dumber gist uses dumber bundler, the default bundle file
is /dist/entry-bundle.js.
The starting module is pointed to aurelia-bootstrapper
(data-main attribute on script) for Aurelia,
The aurelia bootstrapper then loads up user module "main"
(aurelia-app attribute on <body>) which is your src/main.ts.
-->
<body aurelia-app="main">
<script src="/dist/entry-bundle.js" data-main="aurelia-bootstrapper"></script>
</body>
</html>
{
"dependencies": {
"aurelia-bootstrapper": "^2.3.3"
}
}
<template>
<!-- Try to create a css/scss/sass/less file then require it here -->
<!-- should remain in DOM and would get class added -->
<h1 permission.bind="test">${message} 1</h1>
<h1 permission.bind="test">${message} 2</h1>
<!-- would be removed from DOM -->
<h1 permission="permissions.bind: 'test'; behaviour.bind: 'Remove'">${message} 3</h1>
</template>
import { PermissionCustomAttribute } from './permission';
export class App {
public message: string = 'Hello Aurelia!';
}
import {Aurelia} from 'aurelia-framework';
export function configure(aurelia: Aurelia) {
aurelia.use
.standardConfiguration()
.developmentLogging('info');
aurelia.start().then(() => aurelia.setRoot());
}
//import { PermissionService } from 'services/permissions-service';
//import { AppPermissions } from 'services/app-permissions';
import { customAttribute, bindable, templateController, ViewSlot, View, BoundViewFactory } from 'aurelia-framework';
import { autoinject } from 'aurelia-dependency-injection';
enum PermissionBehaviour {
Fade = 'Fade',
Remove = 'Remove',
}
@customAttribute('permission')
@templateController
@autoinject
export class PermissionCustomAttribute {
@bindable({ primaryProperty: true }) permissions: any;
@bindable behaviour: PermissionBehaviour = PermissionBehaviour.Fade;
bindingContext: any;
overrideContext: any;
show = false;
view: View;
constructor(private viewFactory: BoundViewFactory, private viewSlot: ViewSlot/*, private element: Element, element becomes undefined with templateController */) { }
bind(bindingContext, overrideContext) {
this.bindingContext = bindingContext;
this.overrideContext = overrideContext;
if (this.view) this.view.bind(this.bindingContext, this.overrideContext);
// putting in this to ensure view set up if remove behviour not needed?
if (this.behaviour === PermissionBehaviour.Fade) this.applyIf(true);
}
attached() {
if (this.behaviour === PermissionBehaviour.Fade) this.applyFade(this.hasPermission(this.permissions));
if (this.behaviour === PermissionBehaviour.Remove) this.applyIf(this.hasPermission(this.permissions));
}
permissionsChanged(newPermissions: AppPermissions) {
if (this.behaviour === PermissionBehaviour.Fade) this.applyFade(this.hasPermission(this.permissions));
if (this.behaviour === PermissionBehaviour.Remove) this.applyIf(this.hasPermission(this.permissions));
}
hasPermission(permission) {
return Math.random() < 0.5;
}
applyFade(hasPermission: boolean) {
// Would add or remove a class from this.element but its undefined with templateController
// let targetElement: Element = this.element;
// if (this.overrideElement) targetElement = this.overrideElement;
// targetElement.removeEventListener('click', this.interceptClick);
// targetElement.classList.remove('permission-denied', 'permission-denied--' + this.behaviour);
// if (permissions && !this.permissionService.hasAccess(permissions)) {
// targetElement.classList.add('permission-denied', 'permission-denied--' + this.behaviour);
// targetElement.removeEventListener('click', this.interceptClick);
// targetElement.addEventListener('click', this.interceptClick);
// }
}
applyIf(showing: boolean) {
if (showing === this.show) return;
if (showing) {
this.view = this.viewFactory.create();
this.view.bind(this.bindingContext, this.overrideContext);
this.viewSlot.add(this.view);
} else {
this.viewSlot.removeAll();
}
this.show = showing;
}
}
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