Cleanup config flow (#2932)

* Break up config flow dialog

* Allow picking devices when config flow finishes

* Lint

* Tweaks

src/common/translations/localize.ts

@@ -79,3 +79,25 @@ export const computeLocalize = (
     }
   };
 };
+
+/**
+ * Silly helper function that converts an object of placeholders to array so we
+ * can convert it back to an object again inside the localize func.
+ * @param localize
+ * @param key
+ * @param placeholders
+ */
+export const localizeKey = (
+  localize: LocalizeFunc,
+  key: string,
+  placeholders?: { [key: string]: string }
+) => {
+  const args: [string, ...string[]] = [key];
+  if (placeholders) {
+    Object.keys(placeholders).forEach((placeholderKey) => {
+      args.push(placeholderKey);
+      args.push(placeholders[placeholderKey]);
+    });
+  }
+  return localize(...args);
+};

src/components/entity/state-badge.ts

@@ -39,7 +39,7 @@ class StateBadge extends LitElement {
   }
 
   protected updated(changedProps: PropertyValues) {
-    if (!changedProps.has("stateObj")) {
+    if (!changedProps.has("stateObj") || !this.stateObj) {
       return;
     }
     const stateObj = this.stateObj;

src/data/config_entries.ts

@@ -22,7 +22,8 @@ export interface ConfigFlowStepCreateEntry {
   flow_id: string;
   handler: string;
   title: string;
-  data: any;
+  // Config entry ID
+  result: string;
   description: string;
   description_placeholders: { [key: string]: string };
 }

src/dialogs/config-flow/dialog-config-flow.ts

@@ -25,16 +25,32 @@ import {
   fetchConfigFlow,
   createConfigFlow,
   ConfigFlowStep,
-  handleConfigFlowStep,
   deleteConfigFlow,
-  FieldSchema,
-  ConfigFlowStepForm,
 } from "../../data/config_entries";
-import { PolymerChangedEvent, applyPolymerEvent } from "../../polymer-types";
+import { PolymerChangedEvent } from "../../polymer-types";
 import { HaConfigFlowParams } from "./show-dialog-config-flow";
 
+import "./step-flow-loading";
+import "./step-flow-form";
+import "./step-flow-abort";
+import "./step-flow-create-entry";
+import {
+  DeviceRegistryEntry,
+  fetchDeviceRegistry,
+} from "../../data/device_registry";
+import { AreaRegistryEntry, fetchAreaRegistry } from "../../data/area_registry";
+
 let instance = 0;
 
+declare global {
+  // for fire event
+  interface HASSDomEvents {
+    "flow-update": {
+      step?: ConfigFlowStep;
+    };
+  }
+}
+
 @customElement("dialog-config-flow")
 class ConfigFlowDialog extends LitElement {
   @property()
@@ -49,18 +65,15 @@ class ConfigFlowDialog extends LitElement {
   private _step?: ConfigFlowStep;
 
   @property()
-  private _stepData?: { [key: string]: any };
+  private _devices?: DeviceRegistryEntry[];
 
   @property()
-  private _errorMsg?: string;
+  private _areas?: AreaRegistryEntry[];
 
   public async showDialog(params: HaConfigFlowParams): Promise<void> {
     this._params = params;
     this._loading = true;
     this._instance = instance++;
-    this._step = undefined;
-    this._stepData = {};
-    this._errorMsg = undefined;
 
     const fetchStep = params.continueFlowId
       ? fetchConfigFlow(params.hass, params.continueFlowId)
@@ -93,201 +106,91 @@ class ConfigFlowDialog extends LitElement {
     if (!this._params) {
       return html``;
     }
-    const localize = this._params.hass.localize;
-
-    const step = this._step;
-    let headerContent: string | undefined;
-    let bodyContent: TemplateResult | undefined;
-    let buttonContent: TemplateResult | undefined;
-    let descriptionKey: string | undefined;
-
-    if (!step) {
-      bodyContent = html`
-        <div class="init-spinner">
-          <paper-spinner active></paper-spinner>
-        </div>
-      `;
-    } else if (step.type === "abort") {
-      descriptionKey = `component.${step.handler}.config.abort.${step.reason}`;
-      headerContent = "Aborted";
-      bodyContent = html``;
-      buttonContent = html`
-        <mwc-button @click="${this._flowDone}">Close</mwc-button>
-      `;
-    } else if (step.type === "create_entry") {
-      descriptionKey = `component.${
-        step.handler
-      }.config.create_entry.${step.description || "default"}`;
-      headerContent = "Success!";
-      bodyContent = html`
-        <p>Created config for ${step.title}</p>
-      `;
-      buttonContent = html`
-        <mwc-button @click="${this._flowDone}">Close</mwc-button>
-      `;
-    } else {
-      // form
-      descriptionKey = `component.${step.handler}.config.step.${
-        step.step_id
-      }.description`;
-      headerContent = localize(
-        `component.${step.handler}.config.step.${step.step_id}.title`
-      );
-      bodyContent = html`
-        <ha-form
-          .data=${this._stepData}
-          @data-changed=${this._stepDataChanged}
-          .schema=${step.data_schema}
-          .error=${step.errors}
-          .computeLabel=${this._labelCallback}
-          .computeError=${this._errorCallback}
-        ></ha-form>
-      `;
-
-      const allRequiredInfoFilledIn =
-        this._stepData &&
-        step.data_schema.every(
-          (field) =>
-            field.optional ||
-            !["", undefined].includes(this._stepData![field.name])
-        );
-
-      buttonContent = this._loading
-        ? html`
-            <div class="submit-spinner">
-              <paper-spinner active></paper-spinner>
-            </div>
-          `
-        : html`
-            <div>
-              <mwc-button
-                @click=${this._submitStep}
-                .disabled=${!allRequiredInfoFilledIn}
-              >
-                Submit
-              </mwc-button>
-
-              ${!allRequiredInfoFilledIn
-                ? html`
-                    <paper-tooltip position="left">
-                      Not all required fields are filled in.
-                    </paper-tooltip>
-                  `
-                : html``}
-            </div>
-          `;
-    }
-
-    let description: string | undefined;
-
-    if (step && descriptionKey) {
-      const args: [string, ...string[]] = [descriptionKey];
-      const placeholders = step.description_placeholders || {};
-      Object.keys(placeholders).forEach((key) => {
-        args.push(key);
-        args.push(placeholders[key]);
-      });
-      description = localize(...args);
-    }
 
     return html`
-      <paper-dialog
-        with-backdrop
-        .opened=${true}
-        @opened-changed=${this._openedChanged}
-      >
-        <h2>
-          ${headerContent}
-        </h2>
-        <paper-dialog-scrollable>
-          ${this._errorMsg
-            ? html`
-                <div class="error">${this._errorMsg}</div>
-              `
-            : ""}
-          ${description
-            ? html`
-                <ha-markdown .content=${description} allow-svg></ha-markdown>
-              `
-            : ""}
-          ${bodyContent}
-        </paper-dialog-scrollable>
-        <div class="buttons">
-          ${buttonContent}
-        </div>
+      <paper-dialog with-backdrop opened @opened-changed=${this._openedChanged}>
+        ${this._loading
+          ? html`
+              <step-flow-loading></step-flow-loading>
+            `
+          : this._step === undefined
+          ? // When we are going to next step, we render 1 round of empty
+            // to reset the element.
+            ""
+          : this._step.type === "form"
+          ? html`
+              <step-flow-form
+                .step=${this._step}
+                .hass=${this._params.hass}
+              ></step-flow-form>
+            `
+          : this._step.type === "abort"
+          ? html`
+              <step-flow-abort
+                .step=${this._step}
+                .hass=${this._params.hass}
+              ></step-flow-abort>
+            `
+          : this._devices === undefined || this._areas === undefined
+          ? // When it's a create entry result, we will fetch device & area registry
+            html`
+              <step-flow-loading></step-flow-loading>
+            `
+          : html`
+              <step-flow-create-entry
+                .step=${this._step}
+                .hass=${this._params.hass}
+                .devices=${this._devices}
+                .areas=${this._areas}
+              ></step-flow-create-entry>
+            `}
       </paper-dialog>
     `;
   }
 
   protected firstUpdated(changedProps: PropertyValues) {
     super.firstUpdated(changedProps);
-    this.addEventListener("keypress", (ev) => {
-      if (ev.keyCode === 13) {
-        this._submitStep();
-      }
+    this.addEventListener("flow-update", (ev) => {
+      this._processStep((ev as any).detail.step);
     });
   }
 
+  protected updated(changedProps: PropertyValues) {
+    if (
+      changedProps.has("_step") &&
+      this._step &&
+      this._step.type === "create_entry"
+    ) {
+      this._fetchDevices(this._step.result);
+      this._fetchAreas();
+    }
+  }
+
   private get _dialog(): PaperDialogElement {
     return this.shadowRoot!.querySelector("paper-dialog")!;
   }
 
-  private async _submitStep(): Promise<void> {
-    this._loading = true;
-    this._errorMsg = undefined;
-
-    const curInstance = this._instance;
-    const stepData = this._stepData || {};
-
-    const toSendData = {};
-    Object.keys(stepData).forEach((key) => {
-      const value = stepData[key];
-      const isEmpty = [undefined, ""].includes(value);
-
-      if (!isEmpty) {
-        toSendData[key] = value;
-      }
-    });
-
-    try {
-      const step = await handleConfigFlowStep(
-        this._params!.hass,
-        this._step!.flow_id,
-        toSendData
-      );
-
-      if (curInstance !== this._instance) {
-        return;
-      }
-
-      this._processStep(step);
-    } catch (err) {
-      this._errorMsg =
-        (err && err.body && err.body.message) || "Unknown error occurred";
-    } finally {
-      this._loading = false;
-    }
+  private async _fetchDevices(configEntryId) {
+    // Wait 5 seconds to give integrations time to find devices
+    await new Promise((resolve) => setTimeout(resolve, 5000));
+    const devices = await fetchDeviceRegistry(this._params!.hass);
+    this._devices = devices.filter((device) =>
+      device.config_entries.includes(configEntryId)
+    );
   }
 
-  private _processStep(step: ConfigFlowStep): void {
-    this._step = step;
+  private async _fetchAreas() {
+    this._areas = await fetchAreaRegistry(this._params!.hass);
+  }
 
-    // We got a new form if there are no errors.
-    if (step.type === "form") {
-      if (!step.errors) {
-        step.errors = {};
-      }
-
-      if (Object.keys(step.errors).length === 0) {
-        const data = {};
-        step.data_schema.forEach((field) => {
-          if ("default" in field) {
-            data[field.name] = field.default;
-          }
-        });
-        this._stepData = data;
-      }
+  private async _processStep(step: ConfigFlowStep): Promise<void> {
+    if (step === undefined) {
+      this._flowDone();
+      return;
     }
+    this._step = undefined;
+    await this.updateComplete;
+    this._step = step;
   }
 
   private _flowDone(): void {
@@ -307,10 +210,9 @@ class ConfigFlowDialog extends LitElement {
       flowFinished,
     });
 
-    this._errorMsg = undefined;
     this._step = undefined;
-    this._stepData = {};
     this._params = undefined;
+    this._devices = undefined;
   }
 
   private _openedChanged(ev: PolymerChangedEvent<boolean>): void {
@@ -320,51 +222,17 @@ class ConfigFlowDialog extends LitElement {
     }
   }
 
-  private _stepDataChanged(ev: PolymerChangedEvent<any>): void {
-    this._stepData = applyPolymerEvent(ev, this._stepData);
-  }
-
-  private _labelCallback = (schema: FieldSchema): string => {
-    const step = this._step as ConfigFlowStepForm;
-
-    return this._params!.hass.localize(
-      `component.${step.handler}.config.step.${step.step_id}.data.${
-        schema.name
-      }`
-    );
-  };
-
-  private _errorCallback = (error: string) =>
-    this._params!.hass.localize(
-      `component.${this._step!.handler}.config.error.${error}`
-    );
-
   static get styles(): CSSResultArray {
     return [
       haStyleDialog,
       css`
-        .error {
-          color: red;
-        }
         paper-dialog {
           max-width: 500px;
         }
-        ha-markdown {
-          word-break: break-word;
-        }
-        ha-markdown a {
-          color: var(--primary-color);
-        }
-        ha-markdown img:first-child:last-child {
+        paper-dialog > * {
+          margin: 0;
           display: block;
-          margin: 0 auto;
-        }
-        .init-spinner {
-          padding: 10px 100px 34px;
-          text-align: center;
-        }
-        .submit-spinner {
-          margin-right: 16px;
+          padding: 0;
         }
       `,
     ];

src/dialogs/config-flow/step-flow-abort.ts

@@ -0,0 +1,66 @@
+import {
+  LitElement,
+  TemplateResult,
+  html,
+  customElement,
+  property,
+  CSSResult,
+} from "lit-element";
+import "@material/mwc-button";
+
+import { ConfigFlowStepAbort } from "../../data/config_entries";
+import { HomeAssistant } from "../../types";
+import { localizeKey } from "../../common/translations/localize";
+import { fireEvent } from "../../common/dom/fire_event";
+import { configFlowContentStyles } from "./styles";
+
+@customElement("step-flow-abort")
+class StepFlowAbort extends LitElement {
+  @property()
+  public hass!: HomeAssistant;
+
+  @property()
+  private step!: ConfigFlowStepAbort;
+
+  protected render(): TemplateResult | void {
+    const localize = this.hass.localize;
+    const step = this.step;
+
+    const description = localizeKey(
+      localize,
+      `component.${step.handler}.config.abort.${step.reason}`,
+      step.description_placeholders
+    );
+
+    return html`
+        <h2>Aborted</h2>
+        <div class="content">
+          ${
+            description
+              ? html`
+                  <ha-markdown .content=${description} allow-svg></ha-markdown>
+                `
+              : ""
+          }
+        </div>
+        <div class="buttons">
+          <mwc-button @click="${this._flowDone}">Close</mwc-button>
+        </div>
+      </paper-dialog>
+    `;
+  }
+
+  private _flowDone(): void {
+    fireEvent(this, "flow-update", { step: undefined });
+  }
+
+  static get styles(): CSSResult {
+    return configFlowContentStyles;
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    "step-flow-abort": StepFlowAbort;
+  }
+}

src/dialogs/config-flow/step-flow-create-entry.ts

@@ -0,0 +1,191 @@
+import {
+  LitElement,
+  TemplateResult,
+  html,
+  customElement,
+  property,
+  CSSResultArray,
+  css,
+} from "lit-element";
+import "@material/mwc-button";
+import "@polymer/paper-dropdown-menu/paper-dropdown-menu-light";
+import "@polymer/paper-item/paper-item";
+import "@polymer/paper-listbox/paper-listbox";
+
+import { ConfigFlowStepCreateEntry } from "../../data/config_entries";
+import { HomeAssistant } from "../../types";
+import { localizeKey } from "../../common/translations/localize";
+import { fireEvent } from "../../common/dom/fire_event";
+import { configFlowContentStyles } from "./styles";
+import {
+  DeviceRegistryEntry,
+  updateDeviceRegistryEntry,
+} from "../../data/device_registry";
+import {
+  AreaRegistryEntry,
+  createAreaRegistryEntry,
+} from "../../data/area_registry";
+
+@customElement("step-flow-create-entry")
+class StepFlowCreateEntry extends LitElement {
+  @property()
+  public hass!: HomeAssistant;
+
+  @property()
+  public step!: ConfigFlowStepCreateEntry;
+
+  @property()
+  public devices!: DeviceRegistryEntry[];
+
+  @property()
+  public areas!: AreaRegistryEntry[];
+
+  protected render(): TemplateResult | void {
+    const localize = this.hass.localize;
+    const step = this.step;
+
+    const description = localizeKey(
+      localize,
+      `component.${step.handler}.config.create_entry.${step.description ||
+        "default"}`,
+      step.description_placeholders
+    );
+
+    return html`
+        <h2>Success!</h2>
+        <div class="content">
+          ${
+            description
+              ? html`
+                  <ha-markdown .content=${description} allow-svg></ha-markdown>
+                `
+              : ""
+          }
+          <p>Created config for ${step.title}.</p>
+          ${
+            this.devices.length === 0
+              ? ""
+              : html`
+                  <p>We found the following devices:</p>
+                  <div class="devices">
+                    ${this.devices.map(
+                      (device) =>
+                        html`
+                          <div class="device">
+                            <b>${device.name}</b><br />
+                            ${device.model} (${device.manufacturer})
+
+                            <paper-dropdown-menu-light
+                              label="Area"
+                              .device=${device.id}
+                              @selected-item-changed=${this._handleAreaChanged}
+                            >
+                              <paper-listbox
+                                slot="dropdown-content"
+                                selected="0"
+                              >
+                                <paper-item>
+                                  ${localize(
+                                    "ui.panel.config.integrations.config_entry.no_area"
+                                  )}
+                                </paper-item>
+                                ${this.areas.map(
+                                  (area) => html`
+                                    <paper-item .area=${area.area_id}>
+                                      ${area.name}
+                                    </paper-item>
+                                  `
+                                )}
+                              </paper-listbox>
+                            </paper-dropdown-menu-light>
+                          </div>
+                        `
+                    )}
+                  </div>
+                `
+          }
+        </div>
+        <div class="buttons">
+          ${
+            this.devices.length > 0
+              ? html`
+                  <mwc-button @click="${this._addArea}">Add Area</mwc-button>
+                `
+              : ""
+          }
+
+          <mwc-button @click="${this._flowDone}">Finish</mwc-button>
+        </div>
+      </paper-dialog>
+    `;
+  }
+
+  private _flowDone(): void {
+    fireEvent(this, "flow-update", { step: undefined });
+  }
+
+  private async _addArea() {
+    const name = prompt("Name of the new area?");
+    if (!name) {
+      return;
+    }
+    try {
+      const area = await createAreaRegistryEntry(this.hass, {
+        name,
+      });
+      this.areas = [...this.areas, area];
+    } catch (err) {
+      alert("Failed to create area.");
+    }
+  }
+
+  private async _handleAreaChanged(ev: Event) {
+    const dropdown = ev.currentTarget as any;
+    const device = dropdown.device;
+
+    // Item first becomes null, then new item.
+    if (!dropdown.selectedItem) {
+      return;
+    }
+
+    const area = dropdown.selectedItem.area;
+    try {
+      await updateDeviceRegistryEntry(this.hass, device, {
+        area_id: area,
+      });
+    } catch (err) {
+      alert(`Error saving area: ${err.message}`);
+      dropdown.value = null;
+    }
+  }
+
+  static get styles(): CSSResultArray {
+    return [
+      configFlowContentStyles,
+      css`
+        .devices {
+          display: flex;
+          flex-wrap: wrap;
+          margin: -4px;
+        }
+        .device {
+          border: 1px solid var(--divider-color);
+          padding: 5px;
+          border-radius: 4px;
+          margin: 4px;
+          display: inline-block;
+          width: 200px;
+        }
+        .buttons > *:last-child {
+          margin-left: auto;
+        }
+      `,
+    ];
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    "step-flow-create-entry": StepFlowCreateEntry;
+  }
+}

src/dialogs/config-flow/step-flow-form.ts

@@ -0,0 +1,222 @@
+import {
+  LitElement,
+  TemplateResult,
+  html,
+  CSSResultArray,
+  css,
+  customElement,
+  property,
+  PropertyValues,
+} from "lit-element";
+import "@material/mwc-button";
+import "@polymer/paper-tooltip/paper-tooltip";
+import "@polymer/paper-spinner/paper-spinner";
+
+import "../../components/ha-form";
+import "../../components/ha-markdown";
+import "../../resources/ha-style";
+import {
+  handleConfigFlowStep,
+  FieldSchema,
+  ConfigFlowStepForm,
+} from "../../data/config_entries";
+import { PolymerChangedEvent, applyPolymerEvent } from "../../polymer-types";
+import { HomeAssistant } from "../../types";
+import { fireEvent } from "../../common/dom/fire_event";
+import { localizeKey } from "../../common/translations/localize";
+import { configFlowContentStyles } from "./styles";
+
+@customElement("step-flow-form")
+class StepFlowForm extends LitElement {
+  @property()
+  public step!: ConfigFlowStepForm;
+
+  @property()
+  public hass!: HomeAssistant;
+
+  @property()
+  private _loading = false;
+
+  @property()
+  private _stepData?: { [key: string]: any };
+
+  @property()
+  private _errorMsg?: string;
+
+  protected render(): TemplateResult | void {
+    const localize = this.hass.localize;
+    const step = this.step;
+
+    const allRequiredInfoFilledIn =
+      this._stepData === undefined
+        ? // If no data filled in, just check that any field is required
+          step.data_schema.find((field) => !field.optional) === undefined
+        : // If data is filled in, make sure all required fields are
+          this._stepData &&
+          step.data_schema.every(
+            (field) =>
+              field.optional ||
+              !["", undefined].includes(this._stepData![field.name])
+          );
+
+    const description = localizeKey(
+      localize,
+      `component.${step.handler}.config.step.${step.step_id}.description`,
+      step.description_placeholders
+    );
+
+    return html`
+      <h2>
+        ${localize(
+          `component.${step.handler}.config.step.${step.step_id}.title`
+        )}
+      </h2>
+      <div class="content">
+        ${this._errorMsg
+          ? html`
+              <div class="error">${this._errorMsg}</div>
+            `
+          : ""}
+        ${description
+          ? html`
+              <ha-markdown .content=${description} allow-svg></ha-markdown>
+            `
+          : ""}
+        <ha-form
+          .data=${this._stepDataProcessed}
+          @data-changed=${this._stepDataChanged}
+          .schema=${step.data_schema}
+          .error=${step.errors}
+          .computeLabel=${this._labelCallback}
+          .computeError=${this._errorCallback}
+        ></ha-form>
+      </div>
+      <div class="buttons">
+        ${this._loading
+          ? html`
+              <div class="submit-spinner">
+                <paper-spinner active></paper-spinner>
+              </div>
+            `
+          : html`
+              <div>
+                <mwc-button
+                  @click=${this._submitStep}
+                  .disabled=${!allRequiredInfoFilledIn}
+                >
+                  Submit
+                </mwc-button>
+
+                ${!allRequiredInfoFilledIn
+                  ? html`
+                      <paper-tooltip position="left">
+                        Not all required fields are filled in.
+                      </paper-tooltip>
+                    `
+                  : html``}
+              </div>
+            `}
+      </div>
+    `;
+  }
+
+  protected firstUpdated(changedProps: PropertyValues) {
+    super.firstUpdated(changedProps);
+    this.addEventListener("keypress", (ev) => {
+      if (ev.keyCode === 13) {
+        this._submitStep();
+      }
+    });
+  }
+
+  private get _stepDataProcessed() {
+    if (this._stepData !== undefined) {
+      return this._stepData;
+    }
+
+    const data = {};
+    this.step.data_schema.forEach((field) => {
+      if ("default" in field) {
+        data[field.name] = field.default;
+      }
+    });
+    return data;
+  }
+
+  private async _submitStep(): Promise<void> {
+    this._loading = true;
+    this._errorMsg = undefined;
+
+    const flowId = this.step.flow_id;
+    const stepData = this._stepData || {};
+
+    const toSendData = {};
+    Object.keys(stepData).forEach((key) => {
+      const value = stepData[key];
+      const isEmpty = [undefined, ""].includes(value);
+
+      if (!isEmpty) {
+        toSendData[key] = value;
+      }
+    });
+
+    try {
+      const step = await handleConfigFlowStep(
+        this.hass,
+        this.step.flow_id,
+        toSendData
+      );
+
+      if (!this.step || flowId !== this.step.flow_id) {
+        return;
+      }
+
+      fireEvent(this, "flow-update", {
+        step,
+      });
+    } catch (err) {
+      this._errorMsg =
+        (err && err.body && err.body.message) || "Unknown error occurred";
+    } finally {
+      this._loading = false;
+    }
+  }
+
+  private _stepDataChanged(ev: PolymerChangedEvent<any>): void {
+    this._stepData = applyPolymerEvent(ev, this._stepData);
+  }
+
+  private _labelCallback = (schema: FieldSchema): string => {
+    const step = this.step as ConfigFlowStepForm;
+
+    return this.hass.localize(
+      `component.${step.handler}.config.step.${step.step_id}.data.${
+        schema.name
+      }`
+    );
+  };
+
+  private _errorCallback = (error: string) =>
+    this.hass.localize(`component.${this.step.handler}.config.error.${error}`);
+
+  static get styles(): CSSResultArray {
+    return [
+      configFlowContentStyles,
+      css`
+        .error {
+          color: red;
+        }
+
+        .submit-spinner {
+          margin-right: 16px;
+        }
+      `,
+    ];
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    "step-flow-form": StepFlowForm;
+  }
+}

src/dialogs/config-flow/step-flow-loading.ts

@@ -0,0 +1,35 @@
+import {
+  LitElement,
+  TemplateResult,
+  html,
+  css,
+  customElement,
+  CSSResult,
+} from "lit-element";
+import "@polymer/paper-spinner/paper-spinner-lite";
+
+@customElement("step-flow-loading")
+class StepFlowLoading extends LitElement {
+  protected render(): TemplateResult | void {
+    return html`
+      <div class="init-spinner">
+        <paper-spinner-lite active></paper-spinner-lite>
+      </div>
+    `;
+  }
+
+  static get styles(): CSSResult {
+    return css`
+      .init-spinner {
+        padding: 50px 100px;
+        text-align: center;
+      }
+    `;
+  }
+}
+
+declare global {
+  interface HTMLElementTagNameMap {
+    "step-flow-loading": StepFlowLoading;
+  }
+}

src/dialogs/config-flow/styles.ts

@@ -0,0 +1,33 @@
+import { css } from "lit-element";
+
+export const configFlowContentStyles = css`
+  h2 {
+    margin-top: 24px;
+    padding: 0 24px;
+  }
+
+  .content {
+    margin-top: 20px;
+    padding: 0 24px;
+  }
+
+  .buttons {
+    position: relative;
+    padding: 8px 8px 8px 24px;
+    margin: 0;
+    color: var(--primary-color);
+    display: flex;
+    justify-content: flex-end;
+  }
+
+  ha-markdown {
+    word-break: break-word;
+  }
+  ha-markdown a {
+    color: var(--primary-color);
+  }
+  ha-markdown img:first-child:last-child {
+    display: block;
+    margin: 0 auto;
+  }
+`;