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feat: 🧑‍💻 Allow users to use jinja-templates to display first tab dynamically #105

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feat: 🧑‍💻 Allow users to use jinja-templates to display first tab dynamically #105

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60233f4
🧑‍💻 Allow users to use jinja-templates to program first tab on load (…
spasma Jun 20, 2023
0eed0c9
Merge pull request #1 from kinghat/main
spasma Oct 24, 2023
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26 changes: 24 additions & 2 deletions src/tabbed-card.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@ interface TabbedCardConfig extends LovelaceCardConfig {
}

interface options {
defaultTabIndex?: number;
defaultTabIndex?: string | number | undefined;
}

interface Tab {
Expand Down Expand Up @@ -103,6 +103,16 @@ export class TabbedCard extends LitElement {
}

async _createTabs(config: TabbedCardConfig) {
let template = config?.options?.defaultTabIndex;
if (typeof template === "undefined") {
this.selectedTabIndex = 0;
} else if (typeof template === "string") {
let result = await this.evaluateJinjaTemplate(this.hass, template || "0")
// Try to parse the result as a number, if it fails, default to 0 (first tab)
this.selectedTabIndex = parseInt(result) || 0;
} else {
this.selectedTabIndex = isFinite(template)? template : 0;
}
const tabs = await Promise.all(
config.tabs.map(async (tab) => {
return {
Expand Down Expand Up @@ -147,6 +157,18 @@ export class TabbedCard extends LitElement {
// this._tabs.splice(this._tabs.indexOf(cardElement), 1, newCardElement);
}

async evaluateJinjaTemplate(
hass: HomeAssistant,
template: string,
): Promise<any> {
return new Promise(resolve => {
hass.connection.subscribeMessage((msg: { result: string | Record<string, unknown> }) => resolve(msg.result.toString()), {
type: "render_template",
template: template,
});
});
}

render() {
if (!this.hass || !this._config || !this._helpers || !this._tabs?.length) {
return html``;
Expand All @@ -157,7 +179,7 @@ export class TabbedCard extends LitElement {
@MDCTabBar:activated=${(ev: mwcTabBarEvent) =>
(this.selectedTabIndex = ev.detail.index)}
style=${styleMap(this._styles)}
activeIndex=${ifDefined(this._config?.options?.defaultTabIndex)}
activeIndex=${this.selectedTabIndex}
>
<!-- no horizontal scrollbar shown when tabs overflow in chrome -->
${this._tabs.map(
Expand Down