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Modal.tsx
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Modal.tsx
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import app from '../../common/app';
import Component from '../Component';
import Alert, { AlertAttrs } from './Alert';
import Button from './Button';
import type Mithril from 'mithril';
import type ModalManagerState from '../states/ModalManagerState';
import type RequestError from '../utils/RequestError';
import type ModalManager from './ModalManager';
import fireDebugWarning from '../helpers/fireDebugWarning';
import classList from '../utils/classList';
export interface IInternalModalAttrs {
state: ModalManagerState;
animateShow: ModalManager['animateShow'];
animateHide: ModalManager['animateHide'];
}
export interface IDismissibleOptions {
/**
* @deprecated Check specific individual attributes instead. Will be removed in Flarum 2.0.
*/
isDismissible: boolean;
viaCloseButton: boolean;
viaEscKey: boolean;
viaBackdropClick: boolean;
}
/**
* The `Modal` component displays a modal dialog, wrapped in a form. Subclasses
* should implement the `className`, `title`, and `content` methods.
*/
export default abstract class Modal<ModalAttrs extends IInternalModalAttrs = IInternalModalAttrs> extends Component<ModalAttrs> {
// TODO: [Flarum 2.0] remove `isDismissible` static attribute
/**
* Determine whether or not the modal should be dismissible via an 'x' button.
*
* @deprecated Use the individual `isDismissibleVia...` attributes instead and remove references to this.
*/
static readonly isDismissible: boolean = true;
/**
* Can the model be dismissed with a close button (X)?
*
* If `false`, no close button is shown.
*/
protected static readonly isDismissibleViaCloseButton: boolean = true;
/**
* Can the modal be dismissed by pressing the Esc key on a keyboard?
*/
protected static readonly isDismissibleViaEscKey: boolean = true;
/**
* Can the modal be dismissed via a click on the backdrop.
*/
protected static readonly isDismissibleViaBackdropClick: boolean = true;
static get dismissibleOptions(): IDismissibleOptions {
// If someone sets this to `false`, provide the same behaviour as previous versions of Flarum.
if (!this.isDismissible) {
return {
isDismissible: false,
viaCloseButton: false,
viaEscKey: false,
viaBackdropClick: false,
};
}
return {
isDismissible: true,
viaCloseButton: this.isDismissibleViaCloseButton,
viaEscKey: this.isDismissibleViaEscKey,
viaBackdropClick: this.isDismissibleViaBackdropClick,
};
}
protected loading: boolean = false;
/**
* Attributes for an alert component to show below the header.
*/
alertAttrs: AlertAttrs | null = null;
oninit(vnode: Mithril.Vnode<ModalAttrs, this>) {
super.oninit(vnode);
// TODO: [Flarum 2.0] Remove the code below.
// This code prevents extensions which do not implement all abstract methods of this class from breaking
// the forum frontend. Without it, function calls would would error rather than returning `undefined.`
const missingMethods: string[] = [];
['className', 'title', 'content', 'onsubmit'].forEach((method) => {
if (!(this as any)[method]) {
(this as any)[method] = function (): void {};
missingMethods.push(method);
}
});
if (missingMethods.length > 0) {
fireDebugWarning(
`Modal \`${this.constructor.name}\` does not implement all abstract methods of the Modal super class. Missing methods: ${missingMethods.join(
', '
)}.`
);
}
}
oncreate(vnode: Mithril.VnodeDOM<ModalAttrs, this>) {
super.oncreate(vnode);
this.attrs.animateShow(() => this.onready());
}
onbeforeremove(vnode: Mithril.VnodeDOM<ModalAttrs, this>): Promise<void> | void {
super.onbeforeremove(vnode);
// If the global modal state currently contains a modal,
// we've just opened up a new one, and accordingly,
// we don't need to show a hide animation.
if (!this.attrs.state.modal) {
// Here, we ensure that the animation has time to complete.
// See https://mithril.js.org/lifecycle-methods.html#onbeforeremove
// Bootstrap's Modal.TRANSITION_DURATION is 300 ms.
return new Promise((resolve) => setTimeout(resolve, 300));
}
}
/**
* @todo split into FormModal and Modal in 2.0
*/
view() {
if (this.alertAttrs) {
this.alertAttrs.dismissible = false;
}
return (
<div className={classList('Modal modal-dialog fade', this.className())}>
<div className="Modal-content">
{this.dismissibleOptions.viaCloseButton && (
<div className="Modal-close App-backControl">
<Button
icon="fas fa-times"
onclick={() => this.hide()}
className="Button Button--icon Button--link"
aria-label={app.translator.trans('core.lib.modal.close')}
/>
</div>
)}
<form onsubmit={this.onsubmit.bind(this)}>
<div className="Modal-header">
<h3 className="App-titleControl App-titleControl--text">{this.title()}</h3>
</div>
{this.alertAttrs ? <div className="Modal-alert">{Alert.component(this.alertAttrs)}</div> : ''}
{this.content()}
</form>
</div>
</div>
);
}
/**
* Get the class name to apply to the modal.
*/
abstract className(): string;
/**
* Get the title of the modal dialog.
*/
abstract title(): Mithril.Children;
/**
* Get the content of the modal.
*/
abstract content(): Mithril.Children;
/**
* Handle the modal form's submit event.
*/
onsubmit(e: SubmitEvent): void {
// ...
}
/**
* Callback executed when the modal is shown and ready to be interacted with.
*
* @remark Focuses the first input in the modal.
*/
onready(): void {
this.$().find('input, select, textarea').first().trigger('focus').trigger('select');
}
/**
* Hides the modal.
*/
hide(): void {
this.attrs.animateHide();
}
/**
* Sets `loading` to false and triggers a redraw.
*/
loaded(): void {
this.loading = false;
m.redraw();
}
/**
* Shows an alert describing an error returned from the API, and gives focus to
* the first relevant field involved in the error.
*/
onerror(error: RequestError): void {
this.alertAttrs = error.alert;
m.redraw();
if (error.status === 422 && error.response?.errors) {
this.$('form [name=' + (error.response.errors as any[])[0].source.pointer.replace('/data/attributes/', '') + ']').trigger('select');
} else {
this.onready();
}
}
private get dismissibleOptions(): IDismissibleOptions {
return (this.constructor as typeof Modal).dismissibleOptions;
}
}