Integrations - Add Search (#3361)

* ✨ Add search to flow picker

* 🔨 Autofocus

* 🔨 squash extra space

* Update src/dialogs/config-flow/step-flow-pick-handler.ts

Co-Authored-By: Paulus Schoutsen <paulus@home-assistant.io>

* Update src/dialogs/config-flow/step-flow-pick-handler.ts

Co-Authored-By: Paulus Schoutsen <paulus@home-assistant.io>

src/common/search/search-input.ts

@@ -0,0 +1,83 @@
+import { TemplateResult, html } from "lit-html";
+import {
+  css,
+  CSSResult,
+  customElement,
+  LitElement,
+  property,
+} from "lit-element";
+import { fireEvent } from "../dom/fire_event";
+import "@polymer/iron-icon/iron-icon";
+import "@polymer/paper-input/paper-input";
+import "@polymer/paper-icon-button/paper-icon-button";
+import "@material/mwc-button";
+
+@customElement("search-input")
+class SearchInput extends LitElement {
+  @property() private filter?: string;
+
+  protected render(): TemplateResult | void {
+    return html`
+      <div class="search-container">
+        <paper-input
+          autofocus
+          label="Search"
+          .value=${this.filter}
+          @value-changed=${this._filterInputChanged}
+        >
+          <iron-icon
+            icon="mdi:magnify"
+            slot="prefix"
+            class="prefix"
+          ></iron-icon>
+          ${this.filter &&
+            html`
+              <paper-icon-button
+                slot="suffix"
+                class="suffix"
+                @click=${this._clearSearch}
+                icon="mdi:close"
+                alt="Clear"
+                title="Clear"
+              ></paper-icon-button>
+            `}
+        </paper-input>
+      </div>
+    `;
+  }
+
+  private async _filterChanged(value: string) {
+    fireEvent(this, "value-changed", { value: String(value) });
+  }
+
+  private async _filterInputChanged(e) {
+    this._filterChanged(e.target.value);
+  }
+
+  private async _clearSearch() {
+    this._filterChanged("");
+  }
+
+  static get styles(): CSSResult {
+    return css`
+      paper-input {
+        flex: 1 1 auto;
+        margin: 0 16px;
+      }
+      .search-container {
+        display: inline-flex;
+        width: 100%;
+        align-items: center;
+      }
+      .prefix {
+        margin: 8px;
+      }
+    `;
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    "search-input": SearchInput;
+  }
+}

src/dialogs/config-flow/step-flow-pick-handler.ts

@@ -1,10 +1,11 @@
 import {
-  LitElement,
-  TemplateResult,
-  html,
   css,
-  customElement,
   CSSResult,
+  customElement,
+  html,
+  LitElement,
+  property,
+  TemplateResult,
 } from "lit-element";
 import "@polymer/paper-spinner/paper-spinner-lite";
 import "@polymer/paper-item/paper-item";
@@ -12,23 +13,62 @@ import "@polymer/paper-item/paper-item-body";
 import { HomeAssistant } from "../../types";
 import { createConfigFlow } from "../../data/config_entries";
 import { fireEvent } from "../../common/dom/fire_event";
+import memoizeOne from "memoize-one";
+import * as Fuse from "fuse.js";
+
 import "../../components/ha-icon-next";
+import "../../common/search/search-input";
+
+interface HandlerObj {
+  name: string;
+  slug: string;
+}
 
 @customElement("step-flow-pick-handler")
 class StepFlowPickHandler extends LitElement {
-  public hass!: HomeAssistant;
-  public handlers!: string[];
+  @property() public hass!: HomeAssistant;
+  @property() public handlers!: string[];
+  @property() private filter?: string;
+
+  private _getHandlers = memoizeOne((h: string[], filter?: string) => {
+    const handlers: HandlerObj[] = h.map((handler) => {
+      return {
+        name: this.hass.localize(`component.${handler}.config.title`),
+        slug: handler,
+      };
+    });
+
+    if (filter) {
+      const options: Fuse.FuseOptions<HandlerObj> = {
+        keys: ["name", "slug"],
+        caseSensitive: false,
+        minMatchCharLength: 2,
+        threshold: 0.2,
+      };
+      const fuse = new Fuse(handlers, options);
+      return fuse.search(filter);
+    }
+    return handlers.sort((a, b) =>
+      a.name.toUpperCase() < b.name.toUpperCase() ? -1 : 1
+    );
+  });
 
   protected render(): TemplateResult | void {
+    const handlers = this._getHandlers(this.handlers, this.filter);
+
     return html`
       <h2>${this.hass.localize("ui.panel.config.integrations.new")}</h2>
       <div>
-        ${this.handlers.map(
-          (handler) =>
+        <search-input
+          .filter=${this.filter}
+          @value-changed=${this._filterChanged}
+        ></search-input>
+        ${handlers.map(
+          (handler: HandlerObj) =>
             html`
               <paper-item @click=${this._handlerPicked} .handler=${handler}>
                 <paper-item-body>
-                  ${this.hass.localize(`component.${handler}.config.title`)}
+                  ${handler.name}
                 </paper-item-body>
                 <ha-icon-next></ha-icon-next>
               </paper-item>
@@ -38,15 +78,20 @@ class StepFlowPickHandler extends LitElement {
     `;
   }
 
+  private async _filterChanged(e) {
+    this.filter = e.detail.value;
+  }
+
   private async _handlerPicked(ev) {
     fireEvent(this, "flow-update", {
-      stepPromise: createConfigFlow(this.hass, ev.currentTarget.handler),
+      stepPromise: createConfigFlow(this.hass, ev.currentTarget.handler.slug),
     });
   }
 
   static get styles(): CSSResult {
     return css`
       h2 {
+        margin-bottom: 2px;
         padding-left: 16px;
       }
       div {