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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | 1x 1x 1x 1x 6x 12x 2x 1x 1x 1x | import { html } from "../../../renderer/html";
import Fetcher from "../../../utils/data/transfer/Fetcher";
import { ErrorResponse } from "../../../utils/data/transfer/interfaces";
import { CustomElementPropertyMetadata, CustomElementStateMetadata } from "../../interfaces";
const LoadableMixin = Base =>
/**
* Implements a mixin that loads a single record
*/
class Loadable extends Base {
static get properties(): Record<string, CustomElementPropertyMetadata> {
return {
/**
* The URL to retrieve the data from
*/
loadUrl: {
attribute: 'load-url',
type: String,
//required: true Loading the form or other component might be optional
},
/**
* Whether to load the data for the component when the component is connected
*/
autoLoad: {
attribute: 'auto-load',
type: Boolean,
value: true
}
};
}
static get state(): Record<string, CustomElementStateMetadata> {
return {
loading: {
value: false
}
};
}
renderLoading() {
if (this.loading === false) {
return null;
}
return html`<span key="loading-overlay">Loading ...</span>`;
}
connectedCallback() {
super.connectedCallback?.();
Eif (this.loadUrl === undefined) {
return;
}
this._loadFetcher = new Fetcher({
onData: data => this.handleLoadData(data),
onError: error => this.handleLoadError(error)
});
if (this.autoLoad === true) { // Wait until all the fields were added
this.load();
}
}
load() {
this.error = undefined; // Clear any previous error
this.loading = true;
this._loadFetcher.fetch({
url: this.loadUrl
});
}
handleLoadData(data: Record<string, any>) {
this.loading = false;
this.handleLoadedData(data);
}
handleLoadError(error: ErrorResponse) {
this.loading = false;
this.error = error;
}
}
export default LoadableMixin; |