Files
authentik/web/src/elements/forms/Form.ts
2021-03-28 22:07:11 +02:00

110 lines
3.8 KiB
TypeScript

import "@polymer/paper-input/paper-input";
import "@polymer/iron-form/iron-form";
import { PaperInputElement } from "@polymer/paper-input/paper-input";
import { showMessage } from "../../elements/messages/MessageContainer";
import { css, CSSResult, customElement, html, LitElement, property, TemplateResult } from "lit-element";
import PFBase from "@patternfly/patternfly/patternfly-base.css";
import PFCard from "@patternfly/patternfly/components/Card/card.css";
import PFButton from "@patternfly/patternfly/components/Button/button.css";
import AKGlobal from "../../authentik.css";
import PFForm from "@patternfly/patternfly/components/Form/form.css";
import PFFormControl from "@patternfly/patternfly/components/FormControl/form-control.css";
import { MessageLevel } from "../messages/Message";
import { IronFormElement } from "@polymer/iron-form/iron-form";
interface ErrorResponse {
[key: string]: string[];
}
export class APIError extends Error {
constructor(public response: ErrorResponse) {
super();
}
}
@customElement("ak-form")
export class Form<T> extends LitElement {
@property()
successMessage = "";
@property()
send!: (data: T) => Promise<T>;
static get styles(): CSSResult[] {
return [PFBase, PFCard, PFButton, PFForm, PFFormControl, AKGlobal, css`
select[multiple] {
height: 15em;
}
`];
}
serializeForm(form: IronFormElement): T {
const elements = form._getSubmittableElements();
const json: { [key: string]: unknown } = {};
for (let i = 0; i < elements.length; i++) {
const element = elements[i] as HTMLInputElement;
const values = form._serializeElementValues(element);
if (element.tagName.toLowerCase() === "select" && "multiple" in element.attributes) {
json[element.name] = values;
} else {
for (let v = 0; v < values.length; v++) {
form._addSerializedElement(json, element.name, values[v]);
}
}
}
return json as unknown as T;
}
submit(ev: Event): Promise<T> | undefined {
ev.preventDefault();
const ironForm = this.shadowRoot?.querySelector("iron-form");
if (!ironForm) {
console.warn("authentik/forms: failed to find iron-form");
return;
}
const data = this.serializeForm(ironForm);
return this.send(data).then((r) => {
showMessage({
level: MessageLevel.success,
message: this.successMessage
});
return r;
}).catch((ex: Response) => {
if (ex.status > 399 && ex.status < 500) {
return ex.json().then((errorMessage: ErrorResponse) => {
if (!errorMessage) return errorMessage;
if (errorMessage instanceof Error) {
throw errorMessage;
}
const elements: PaperInputElement[] = ironForm._getSubmittableElements();
elements.forEach((element) => {
const elementName = element.name;
if (!elementName) return;
if (elementName in errorMessage) {
element.errorMessage = errorMessage[elementName].join(", ");
element.invalid = true;
}
});
throw new APIError(errorMessage);
});
}
throw ex;
});
}
renderForm(): TemplateResult {
return html`<slot></slot>`;
}
render(): TemplateResult {
return html`<iron-form
@iron-form-presubmit=${(ev: Event) => { this.submit(ev); }}>
${this.renderForm()}
</iron-form>`;
}
}