Extract time-unit component. Refactor styles. Refactor error partial.

src/components/time-unit.ts

@@ -0,0 +1,109 @@
+import {
+  css,
+  CSSResult,
+  customElement,
+  html,
+  LitElement,
+  property,
+  TemplateResult,
+} from 'lit-element';
+import { TimeUnit } from '../models';
+import { Direction } from '../types';
+
+@customElement('time-unit')
+export class TimeUnitComponent extends LitElement {
+  @property() private unit?: TimeUnit;
+
+  render(): TemplateResult {
+    if (!this.unit) {
+      throw new Error('Missing unit in time-unit. This should never happen :)');
+    }
+
+    return html`<div class="time-unit">
+      ${this.renderStepChanger(Direction.UP)}
+      <input
+        class="time-input"
+        type="number"
+        placeholder="MM"
+        min="0"
+        max="60"
+        .value="${this.unit.toString()}"
+        @change=${this.onInputChange}
+      />
+      ${this.renderStepChanger(Direction.DOWN)}
+    </div>`;
+  }
+
+  onInputChange({ target: { value } }: { target: HTMLInputElement }): void {
+    this.unit!.setStringValue(value);
+    this.emitUpdate();
+  }
+
+  onStepChangerClick(direction: Direction): void {
+    this.unit!.stepUpdate(direction);
+    this.emitUpdate();
+  }
+
+  private emitUpdate(): void {
+    const event = new CustomEvent('update');
+    this.dispatchEvent(event);
+  }
+
+  private renderStepChanger(direction: Direction): TemplateResult {
+    return html`
+      <div class="time-picker-icon" @click=${() => this.onStepChangerClick(direction)}>
+        <ha-icon .icon="mdi:arrow-${direction}"></ha-icon>
+        <mwc-ripple id="ripple"></mwc-ripple>
+      </div>
+    `;
+  }
+
+  static get styles(): CSSResult {
+    return css`
+      .time-unit {
+        display: flex;
+        flex-direction: column;
+        align-items: center;
+        padding: 0 8px;
+      }
+
+      .time-picker-icon {
+        width: 30px;
+        padding: 8px;
+        text-align: center;
+        cursor: pointer;
+      }
+
+      .time-input {
+        width: 30px;
+        padding: 8px 8px 6px;
+        background: var(--time-picker-card-background-color);
+        border: 0;
+        border-bottom: 2px solid var(--time-picker-card-background-color);
+        color: var(--text-color, #fff);
+        text-align: center;
+        font-size: 1em;
+        -moz-appearance: textfield;
+
+        transition: border-color 0.2s ease-in-out;
+      }
+
+      .time-input:focus {
+        outline: none;
+      }
+
+      .time-input:invalid {
+        box-shadow: none;
+        outline: none;
+        border: 0;
+        border-bottom: 2px solid red;
+      }
+
+      .time-input::-webkit-inner-spin-button,
+      .time-input::-webkit-outer-spin-button {
+        -webkit-appearance: none;
+        margin: 0;
+      }
+    `;
+  }
+}

src/const.ts

@@ -1,3 +1,7 @@
 import * as pkg from '../package.json';
 
 export const CARD_VERSION = pkg.version;
+
+export const STYLE_VARIABLES = {
+  '--time-picker-card-background-color': 'rgb(37, 47, 68)',
+};

src/partials.ts

@@ -1,51 +1,16 @@
 import { html, TemplateResult } from 'lit-element';
-import { TimePickerCardConfig, Direction } from './types';
-import { TimeUnit } from './models';
+import { TimePickerCardConfig } from './types';
+import { LovelaceCard } from 'custom-card-helpers';
 
 export class Partial {
-  static unit(unit: TimeUnit, serviceFn: () => Promise<void>): TemplateResult {
-    const onInputChange = ({ target: { value } }: { target: HTMLInputElement }): void => {
-      unit.setStringValue(value);
-      serviceFn();
-    };
-
-    return html`
-      <div class="time-unit">
-        ${Partial.stepChanger(Direction.UP, unit, serviceFn)}
-        <input
-          class="time-input"
-          type="number"
-          placeholder="MM"
-          min="0"
-          max="60"
-          .value="${unit.toString()}"
-          @change=${onInputChange}
-        />
-        ${Partial.stepChanger(Direction.DOWN, unit, serviceFn)}
-      </div>
-    `;
-  }
-
-  private static stepChanger(
-    direction: Direction,
-    unit: TimeUnit,
-    serviceFn: () => Promise<void>
-  ): TemplateResult {
-    const onIconClick = (): void => {
-      unit.stepUpdate(direction);
-      serviceFn();
-    };
-
-    return html`
-      <div class="time-picker-icon" @click=${onIconClick}>
-        <ha-icon .icon="mdi:arrow-${direction}"></ha-icon>
-        <mwc-ripple id="ripple"></mwc-ripple>
-      </div>
-    `;
-  }
-
   static error(error: string, origConfig: TimePickerCardConfig): TemplateResult {
-    const config = { error, origConfig };
-    return html`<hui-error-card ._config="${config}"></hui-error-card>`;
+    const errorCard = document.createElement('hui-error-card') as LovelaceCard;
+    errorCard.setConfig({
+      type: 'error',
+      error,
+      origConfig,
+    });
+
+    return html`${errorCard}`;
   }
 }

src/styles.ts

@@ -1,60 +0,0 @@
-import { css } from 'lit-element';
-
-export const styleVariables = {
-  '--time-picker-card-background-color': 'rgb(37, 47, 68)',
-};
-
-export const styles = css`
-  .time-picker-ha-card {
-    padding: 16px;
-    display: flex;
-    flex-direction: row;
-    align-items: center;
-    justify-content: center;
-  }
-
-  .time-unit {
-    display: flex;
-    flex-direction: column;
-    align-items: center;
-    padding: 0 8px;
-  }
-
-  .time-picker-icon {
-    width: 30px;
-    padding: 8px;
-    text-align: center;
-    cursor: pointer;
-  }
-
-  .time-input {
-    width: 30px;
-    padding: 8px;
-    background: var(--time-picker-card-background-color);
-    border: 0;
-    color: var(--text-color, #fff);
-    text-align: center;
-    font-size: 1em;
-  }
-
-  input[type='number']::-webkit-inner-spin-button,
-  input[type='number']::-webkit-outer-spin-button {
-    -webkit-appearance: none;
-    margin: 0;
-  }
-
-  input[type='number'] {
-    -moz-appearance: textfield;
-  }
-
-  input[type='number']:focus {
-    outline: none;
-  }
-
-  input[type='number']:invalid {
-    box-shadow: none;
-    outline: none;
-    border: 0;
-    border-bottom: 2px solid red;
-  }
-`;

src/time-picker-card.ts

@@ -1,10 +1,18 @@
 import { HomeAssistant } from 'custom-card-helpers';
 import { HassEntity } from 'home-assistant-js-websocket';
-import { CSSResult, customElement, html, LitElement, property, TemplateResult } from 'lit-element';
-import { CARD_VERSION } from './const';
+import {
+  css,
+  CSSResult,
+  customElement,
+  html,
+  LitElement,
+  property,
+  TemplateResult,
+} from 'lit-element';
+import './components/time-unit';
+import { CARD_VERSION, STYLE_VARIABLES } from './const';
 import { Hour, Minute } from './models';
 import { Partial } from './partials';
-import { styles, styleVariables } from './styles';
 import { TimePickerCardConfig } from './types';
 
 console.info(
@@ -20,6 +28,14 @@ export class TimePickerCard extends LitElement {
   @property() private hour?: Hour;
   @property() private minute?: Minute;
 
+  connectedCallback(): void {
+    super.connectedCallback();
+
+    Object.entries(STYLE_VARIABLES).forEach(([variable, value]) =>
+      this.style.setProperty(variable, value)
+    );
+  }
+
   private get entity(): HassEntity | undefined {
     if (!this.config) {
       return;
@@ -44,15 +60,14 @@ export class TimePickerCard extends LitElement {
       );
     }
 
-    this.setStyleVarialbes();
     this.hour = new Hour(this.entity?.attributes.hour ?? 0, this.config.hour_step);
     this.minute = new Minute(this.entity?.attributes.minute ?? 0, this.config.minute_step);
 
     return html`
       <ha-card class="time-picker-ha-card">
-        ${Partial.unit(this.hour, this.serviceFn.bind(this))}
+        <time-unit .unit=${this.hour} @update=${this.serviceFn.bind(this)}></time-unit>
         <div class="time-separator">:</div>
-        ${Partial.unit(this.minute, this.serviceFn.bind(this))}
+        <time-unit .unit=${this.minute} @update=${this.serviceFn.bind(this)}></time-unit>
       </ha-card>
     `;
   }
@@ -86,13 +101,15 @@ export class TimePickerCard extends LitElement {
     });
   }
 
-  private setStyleVarialbes(): void {
-    Object.entries(styleVariables).forEach(([variable, value]) =>
-      this.style.setProperty(variable, value)
-    );
-  }
-
   static get styles(): CSSResult {
-    return styles;
+    return css`
+      .time-picker-ha-card {
+        padding: 16px;
+        display: flex;
+        flex-direction: row;
+        align-items: center;
+        justify-content: center;
+      }
+    `;
   }
 }

src/types.ts

@@ -1,4 +1,6 @@
-export interface TimePickerCardConfig {
+import { LovelaceCardConfig } from 'custom-card-helpers';
+
+export interface TimePickerCardConfig extends LovelaceCardConfig {
   entity: string;
   hour_step?: number;
   minute_step?: number;