Implementierung der Suche und Integration mit externer API in Angular 18

export interface SearchDestination {
  readonly [key: string]: unknown;
  readonly id: string;
  readonly type: string;
  readonly code: string;
  readonly name: string;
  readonly country_name: string;
  readonly city_name: string;
  readonly value: string; // ???
}

export interface SearchFieldOptions {
  readonly [key: string]: unknown;
  readonly id: string;
  readonly label: string;
  readonly name?: string;
  readonly placeholder?: string;
}

export type SearchFormOptions<T> = {
  readonly [P in keyof T]: SearchFieldOptions;
};

export function getSearchQueryParams(
  form: Readonly<Record<string, string | number | boolean | Record<string, unknown>>>,
): Record<string, unknown> {
  const params: Record<string, unknown> = {};

  for (const [key, value] of Object.entries(form)) {
    if (!!value && typeof value === 'object') {
      params[key] = 'value' in value ? value['value'] : undefined;
    } else {
      params[key] = value;
    }
  }

  return params;
}

mkdir src/app/search/avia
mkdir src/app/search/avia/common
mkdir src/app/search/avia/common/lib
echo >src/app/search/avia/common/index.ts

import { castQueryParams } from '@baf/core';

export interface SearchDeclination {
  readonly vi: string;
  readonly tv: string;
  readonly su: string;
  readonly ro: string;
  readonly pr: string;
  readonly da: string;
}

export interface SearchCityOrAirportDTO {
  readonly id: string;
  readonly type: string;
  readonly code: string;
  readonly name: string;
  readonly country_code: string;
  readonly country_name: string;
  readonly city_name?: string;
  readonly state_code: string | null;
  readonly coordinates: {
    readonly lon: number;
    readonly lat: number;
  };
  readonly index_strings: unknown[];
  readonly weight: number;
  readonly cases: SearchDeclination | null;
  readonly country_cases: SearchDeclination | null;
  readonly main_airport_name: string | null;
}

export interface SearchFlightOptions {
  readonly [key: string]: unknown;

  readonly currency: string;
  readonly origin: string;
  readonly destination: string;
  readonly departure_at: string;
  readonly return_at?: string;
  readonly one_way?: string;
  readonly direct?: boolean;
  readonly unique?: boolean;
  readonly limit?: number;
  readonly page?: number;
  readonly soring?: string;

  readonly token: string;
}

export interface SearchFlight {
  readonly origin: string;
  readonly destination: string;
  readonly origin_airport: string;
  readonly destination_airport: string;
  readonly price: number;
  readonly airline: string;
  readonly flight_number: string;
  readonly departure_at: string;
  readonly return_at: string;
  readonly transfers: number;
  readonly return_transfers: number;
  readonly duration: number;
  readonly duration_to: number;
  readonly duration_back: number;
  readonly link: string;
}

export interface SearchFlightResponse {
  readonly success: boolean;
  readonly data: SearchFlight[];
  readonly currency: string;
}

export interface SearchAviaLine {
  readonly origin: string;
  readonly originName: string;
  readonly destination: string;
  readonly destinationName: string;
  readonly duration: number;
  readonly departureAt: string;
  readonly arriveAt: string;
  readonly transfers: number;
}

export function getSearchFlightOptions(queryParams: Record<string, unknown>, token: string, currency: string): SearchFlightOptions {
  const { from, to, direct, startDate, endDate } = castQueryParams(queryParams);

  if (
    typeof from !== 'string' ||
    typeof to !== 'string' ||
    (typeof direct !== 'boolean' && typeof direct !== 'undefined') ||
    typeof startDate !== 'string' ||
    (typeof endDate !== 'string' && typeof endDate !== 'undefined')
  ) {
    throw new Error('Invalid search flight options');
  }

  return {
    origin: from,
    destination: to,
    direct,
    currency: currency.toLowerCase(),
    departure_at: startDate,
    return_at: endDate,
    token,
    sorting: 'price',
  };
}

import { FormControl, FormGroup, Validators } from '@angular/forms';

import type { FormFor } from '@baf/core';
import type { SearchDestination } from '@baf/search/common';

export interface SearchAviaForm {
  readonly from: string | SearchDestination;
  readonly to: string | SearchDestination;
  readonly startDate: string;
  readonly endDate: string;
  readonly passengers: number;
}

export type SearchAviaFormGroup = FormGroup<FormFor<SearchAviaForm>>;

export const initialSearchAviaFormGroup: SearchAviaFormGroup = new FormGroup({
  from: new FormControl<string | SearchDestination>('', {
    nonNullable: true,
    validators: [Validators.required],
  }),
  to: new FormControl<string | SearchDestination>('', {
    nonNullable: true,
    validators: [Validators.required],
  }),
  startDate: new FormControl<string>('', {
    nonNullable: true,
    validators: [Validators.required],
  }),
  endDate: new FormControl<string>('', {
    nonNullable: true,
    validators: [],
  }),
  passengers: new FormControl<number>(1, {
    nonNullable: true,
    validators: [Validators.required, Validators.min(1), Validators.max(20)],
  }),
});

import { FormControl, FormGroup } from '@angular/forms';

import type { FormFor } from '@baf/core';

export interface SearchAviaFilters {
  readonly baggage: boolean;
  readonly direct: boolean;
}

export type SearchAviaFiltersGroup = FormGroup<FormFor<SearchAviaFilters>>;

export const initialSearchAviaFiltersGroup: SearchAviaFiltersGroup = new FormGroup({
  baggage: new FormControl(false, { nonNullable: true, validators: [] }),
  direct: new FormControl(false, { nonNullable: true, validators: [] }),
});

mkdir src/app/search/avia/services
mkdir src/app/search/avia/services/lib
echo >src/app/search/avia/services/index.ts

import { HttpClient } from '@angular/common/http';
import { DEFAULT_CURRENCY_CODE, inject, Injectable, TransferState } from '@angular/core';
import type { Observable } from 'rxjs';
import { map } from 'rxjs';

import type { Environment } from '@baf/core';
import { castParams, ENV_DEFAULT, ENV_KEY } from '@baf/core';
import type { SearchFlight, SearchFlightResponse } from '@baf/search/avia/common';
import { getSearchFlightOptions } from '@baf/search/avia/common';

@Injectable()
export class SearchAviaService {
  private readonly httpClient = inject(HttpClient);
  private readonly environment = inject(TransferState).get<Environment>(ENV_KEY, ENV_DEFAULT);
  private readonly currency = inject(DEFAULT_CURRENCY_CODE);

  findFlights(queryParams: Record<string, unknown>): Observable<SearchFlight[]> {
    const params = castParams(getSearchFlightOptions(queryParams, this.environment.aviasalesToken, this.currency));

    return this.httpClient.get<SearchFlightResponse>('/api/aviasales/v3/prices_for_dates', { params }).pipe(map(({ data }) => data));
  }
}

yarn add -D dotenv

import { bootstrapApplication } from '@angular/platform-browser';
import dotenv from 'dotenv';

import { AppComponent } from './app/app.component';
import { config } from './app/app.config.server';

dotenv.config();

const bootstrap = () => bootstrapApplication(AppComponent, config);

export default bootstrap;

{
  "/api/autocomplete": {
    "target": "https://autocomplete.travelpayouts.com",
    "secure": false,
    "pathRewrite": {
      "^/api/autocomplete": ""
    },
    "changeOrigin": true
  },
  "/api/aviasales": {
    "target": "https://api.travelpayouts.com",
    "secure": false,
    "pathRewrite": {
      "^/api": ""
    },
    "changeOrigin": true
  },
  "/api/hotels": {
    "target": "https://engine.hotellook.com/api/v2",
    "secure": false,
    "pathRewrite": {
      "^/api/hotels": ""
    },
    "changeOrigin": true
  }
}

{
  ...,
  "serve": {
    "builder": "@angular-devkit/build-angular:dev-server",
    "options": {
      "proxyConfig": "src/proxy.conf.json"
    }
  }
}

export const config = mergeApplicationConfig(envConfig, appConfig, serverConfig);

AVIASALES_TOKEN=YourTokenForTravelPayouts
HOTELLOOK_TOKEN=YourTokenForTravelPayouts

import { APP_BASE_HREF } from '@angular/common';
import { CommonEngine } from '@angular/ssr';
import express from 'express';
import { createProxyMiddleware } from 'http-proxy-middleware';
import { dirname, join, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';

import bootstrap from './src/main.server';

// The Express app is exported so that it can be used by serverless Functions.
export function app(): express.Express {
  const server = express();
  const serverDistFolder = dirname(fileURLToPath(import.meta.url));
  const locale = serverDistFolder.split('/').at(-1) ?? '';
  const browserDistFolder = resolve(serverDistFolder, '../../browser', locale);
  const indexHtml = join(serverDistFolder, 'index.server.html');

  const commonEngine = new CommonEngine();

  // Note: Don't use in production! For tutorial only...
  server.use(
    '/api/autocomplete',
    createProxyMiddleware({
      target: 'https://autocomplete.travelpayouts.com',
      changeOrigin: true,
      secure: false,
      pathRewrite: {
        '^/api/autocomplete': '',
      },
    }),
  );
  server.use(
    '/api/aviasales',
    createProxyMiddleware({
      target: 'https://api.travelpayouts.com/aviasales',
      secure: false,
      pathRewrite: {
        '^/api/aviasales': '',
      },
      changeOrigin: true,
    }),
  );
  server.use(
    '/api/hotels',
    createProxyMiddleware({
      target: 'https://engine.hotellook.com/api/v2',
      secure: false,
      pathRewrite: {
        '^/api/hotels': '',
      },
      changeOrigin: true,
    }),
  );

  server.set('view engine', 'html');
  server.set('views', browserDistFolder);

  // Example Express Rest API endpoints
  // server.get('/api/**', (req, res) => { });

  // Serve static files from /browser
  server.get(
    '**',
    express.static(browserDistFolder, {
      maxAge: '1y',
      index: 'index.html',
    }),
  );

  // All regular routes use the Angular engine
  server.get('**', (req, res, next) => {
    const { protocol, originalUrl, baseUrl, headers } = req;

    commonEngine
      .render({
        bootstrap,
        documentFilePath: indexHtml,
        url: `${protocol}://${headers.host}${originalUrl}`,
        publicPath: browserDistFolder,
        providers: [{ provide: APP_BASE_HREF, useValue: baseUrl }],
      })
      .then((html) => res.send(html))
      .catch((err) => next(err));
  });

  return server;
}

function run(): void {
  const port = process.env['PORT'] || 4000;

  // Start up the Node server
  const server = app();
  server.listen(port, () => {
    console.log(`Node Express server listening on http://localhost:${port}`);
  });
}

run();

mkdir src/app/search/ui
mkdir src/app/search/ui/fields
mkdir src/app/search/ui/fields/lib
echo >src/app/search/ui/fields/index.ts

yarn ng g c search-date

<baf-datepicker [control]="control()" [options]="options()"></baf-datepicker>

@use 'src/stylesheets/device' as device;

:host {
  width: 100%;

  &.is-hide {
    display: none;
  }

  &.is-start-date.is-valid {
    border-right: 1px solid var(--md-sys-color-background);
  }

  @include device.media-web() {
    &.is-hide {
      display: flex;
      flex-grow: 1;
    }

    &.is-start-date,
    &.is-start-date.is-valid {
      border-left: 1px solid var(--md-sys-color-background);
      border-right: 1px solid var(--md-sys-color-background);
    }

    &.is-end-date {
      border-right: 1px solid var(--md-sys-color-background);
    }
  }
}

import { ChangeDetectionStrategy, Component, inject, input } from '@angular/core';
import type { FormControl } from '@angular/forms';

import { camelCaseToHumanize, ExtraClassService } from '@baf/core';
import type { SearchFieldOptions } from '@baf/search/common';
import type { DatepickerOptions } from '@baf/ui/datepicker';
import { DatepickerComponent } from '@baf/ui/datepicker';

export interface SearchDateOptions extends SearchFieldOptions {
  readonly startDate?: FormControl<string>;
}

@Component({
  selector: 'baf-search-date',
  standalone: true,
  imports: [DatepickerComponent],
  templateUrl: './search-date.component.html',
  styleUrl: './search-date.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  providers: [ExtraClassService],
})
export class SearchDateComponent {
  private readonly extraClassService = inject(ExtraClassService);

  readonly control = input.required<FormControl<string>, FormControl<string>>({
    transform: (value) => {
      this.extraClassService.register('valid', value.valueChanges, () => {
        this.extraClassService.patch('is-valid', value.valid);
      });

      return value;
    },
  });

  readonly options = input.required<DatepickerOptions, SearchDateOptions>({
    transform: (value) => {
      this.extraClassService.update('options', value.id ? `is-${camelCaseToHumanize(value.id)}` : '');

      if (value.startDate) {
        this.extraClassService.register('invalid', value.startDate.valueChanges, () => {
          this.extraClassService.patch('is-hide', !!value.startDate?.invalid);
        });
      }

      return {
        ...value,
        mask: '00.00.0000',
        maskTo: (val: string) => {
          const [year, month, day] = val.split('-');

          return `${day}.${month}.${year}`;
        },
        maskForm: (val: string) => {
          const [day, month, year] = val.split('.');

          return `${year}-${month}-${day}`;
        },
      };
    },
  });
}

yarn ng g c search-destination

<baf-autocomplete [control]="control()" [options]="options()" [data]="data$"></baf-autocomplete>

@use 'src/stylesheets/device' as device;

:host {
  width: 100%;

  &.is-from {
    border-bottom: 1px solid var(--md-sys-color-background);
  }

  @include device.media-web() {
    &.is-from {
      border-bottom: none;
    }
  }
}

import type { OnInit } from '@angular/core';
import { ChangeDetectionStrategy, Component, DestroyRef, inject, input } from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import type { FormControl } from '@angular/forms';
import { BehaviorSubject, debounceTime, EMPTY, of, switchMap, tap } from 'rxjs';

import { ExtraClassService, toClass } from '@baf/core';
import type { SearchDestination, SearchFieldOptions } from '@baf/search/common';
import type { AutocompleteOptions } from '@baf/ui/autocomplete';
import { AutocompleteComponent } from '@baf/ui/autocomplete';
import { InputComponent } from '@baf/ui/input';

import { SearchDestinationService } from './search-destination.service';

export interface SearchDestinationOptions extends SearchFieldOptions {
  readonly types?: string[];
  readonly key?: string;
}

@Component({
  selector: 'baf-search-destination',
  standalone: true,
  imports: [InputComponent, AutocompleteComponent],
  templateUrl: './search-destination.component.html',
  styleUrl: './search-destination.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  providers: [ExtraClassService, SearchDestinationService],
})
export class SearchDestinationComponent implements OnInit {
  private readonly destroyRef = inject(DestroyRef);
  private readonly searchDestinationService = inject(SearchDestinationService);
  private readonly extraClassService = inject(ExtraClassService);

  readonly control = input.required<FormControl<string | SearchDestination>>();
  readonly options = input.required<AutocompleteOptions & SearchDestinationOptions, SearchDestinationOptions>({
    transform: (options) => {
      this.extraClassService.update('options', toClass(options.id));

      return {
        ...options,
        key: options.key ?? 'code',
        displayFn: (item: SearchDestination) => {
          return `${item.name}, ${item.code}<br>${item.country_name}, ${item.city_name ?? item.name}`;
        },
        inputDisplayFn: (item: SearchDestination | string) => {
          if (!item) {
            return '';
          }
          if (typeof item === 'string') {
            return item;
          }

          return `${item.name}, ${item.code}`;
        },
      };
    },
  });

  readonly data$ = new BehaviorSubject<SearchDestination[]>([]);

  ngOnInit(): void {
    this.control()
      .valueChanges.pipe(
        debounceTime(300),
        switchMap((query) => {
          if (!query) {
            return of([]);
          }

          if (typeof query !== 'string') {
            return EMPTY;
          }

          return this.searchDestinationService.findDestination(query, this.options().key, this.options().types);
        }),
        tap((response) => this.data$.next(response.slice(0, 6))),
        takeUntilDestroyed(this.destroyRef),
      )
      .subscribe();
  }
}

import { HttpClient } from '@angular/common/http';
import { inject, Injectable, LOCALE_ID } from '@angular/core';
import type { Observable } from 'rxjs';
import { map } from 'rxjs';

import type { SearchDestination } from '@baf/search/common';

@Injectable()
export class SearchDestinationService {
  private readonly httpClient = inject(HttpClient);
  private readonly localeId = inject(LOCALE_ID);

  findDestination(term: string, key: string, types?: string[]): Observable<SearchDestination[]> {
    const withTypes = types?.length ? `&${types.map((type) => `types[]=${type}`).join('&')}` : '';

    return this.httpClient.get<SearchDestination[]>(`/api/autocomplete/places2?locale=${this.localeId}${withTypes}&term=${term}`).pipe(
      map((result) =>
        result.map((item) => ({
          ...item,
          value: item[key as 'code' | 'name'],
        })),
      ),
    );
  }
}

ngOnInit(): void {
    this.control()
      .valueChanges.pipe(
        debounceTime(300),
        switchMap((query) => {
          if (!query) {
            return of([]);
          }

          if (typeof query !== 'string') {
            return EMPTY;
          }

          return this.searchDestinationService.findDestination(query, this.options().key, this.options().types);
        }),
        tap((response) => this.data$.next(response.slice(0, 6))),
        takeUntilDestroyed(this.destroyRef),
      )
      .subscribe();
  }

yarn ng g c search-reverse

<button baf-icon-button type="button" (click)="onReverse()" i18n-aria-label="Search Field|Swap" aria-label="Swap"><baf-sync-alt /></button>

@use 'src/stylesheets/device' as device;

:host {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 100;

  @include device.media-web() {
    position: relative;
    top: initial;
    right: initial;

    background-color: var(--md-sys-color-surface-variant);
    color: var(--md-sys-color-on-surface-variant);
    display: flex;
    border-left: 1px solid var(--md-sys-color-background);
    border-right: 1px solid var(--md-sys-color-background);

    button {
      display: flex;
      align-items: center;
      height: 3rem;
    }
  }
}

button {
  line-height: 1;
}

import { ChangeDetectionStrategy, Component, input } from '@angular/core';
import type { FormGroup } from '@angular/forms';

import { IconButtonComponent } from '@baf/ui/buttons';
import { SyncAltComponent } from '@baf/ui/icons';

@Component({
  selector: 'baf-search-reverse',
  standalone: true,
  imports: [SyncAltComponent, IconButtonComponent],
  templateUrl: './search-reverse.component.html',
  styleUrl: './search-reverse.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class SearchReverseComponent {
  readonly form = input.required<FormGroup>();

  onReverse(): void {
    const { from, to } = this.form().getRawValue();

    if (from && to) {
      this.form().patchValue({ from: to, to: from }, { emitEvent: false });
    }
  }
}

yarn ng g c search-passengers

<baf-input-control>
  <label baf-label [attr.for]="options().id">{{ options().label }}</label>
  <input [id]="options().id" baf-input type="number" [formControl]="control()" [placeholder]="options().placeholder ?? ''" />
</baf-input-control>

import { ChangeDetectionStrategy, Component, input } from '@angular/core';
import type { FormControl } from '@angular/forms';
import { ReactiveFormsModule } from '@angular/forms';

import type { SearchFieldOptions } from '@baf/search/common';
import { InputComponent, InputControlComponent } from '@baf/ui/input';
import { LabelComponent } from '@baf/ui/label';

export type SearchPassengersOptions = SearchFieldOptions;

@Component({
  selector: 'baf-search-passengers',
  standalone: true,
  imports: [ReactiveFormsModule, InputComponent, InputControlComponent, LabelComponent],
  templateUrl: './search-passengers.component.html',
  styleUrl: './search-passengers.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class SearchPassengersComponent {
  readonly control = input.required<FormControl<number | undefined>>();
  readonly options = input.required<SearchPassengersOptions>();
}

import { ChangeDetectionStrategy, Component, inject, input } from '@angular/core';

import { ExtraClassService, toClass } from '@baf/core';

export type SearchGroupType = 'destination' | 'date' | 'line' | 'submit' | 'single' | undefined;

@Component({
  selector: 'baf-search-group',
  standalone: true,
  imports: [],
  template: '<ng-content/>',
  styleUrl: './search-group.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  providers: [ExtraClassService],
})
export class SearchGroupComponent {
  private readonly extraClassService = inject(ExtraClassService);

  readonly mode = input<SearchGroupType, SearchGroupType>(undefined, {
    transform: (value) => {
      this.extraClassService.update('mode', toClass(value));

      return value;
    },
  });
}

@use 'src/stylesheets/device' as device;

:host {
  display: flex;
  flex-direction: column;
  position: relative;
  flex-grow: 1;

  &.is-date {
    flex-direction: row;
  }

  &.is-single {
    flex-grow: 100;
  }

  &.is-line {
    flex-direction: row;
    gap: 1rem;
  }

  @include device.media-web() {
    flex-direction: row;

    &.is-line {
      gap: 0;
    }
    &.is-submit {
      gap: 0;
      margin-left: 1rem;
    }
  }
}

mkdir src/app/search/ui/form
mkdir src/app/search/ui/form/lib
echo >src/app/search/ui/form/index.ts

<form [formGroup]="form()" (ngSubmit)="onSubmit()">
  <ng-content />
  <baf-search-group mode="submit">
    <button baf-button bafMode="primary" bafWidth="max" type="submit" i18n="Search Form|Find">Find</button>
  </baf-search-group>
</form>

    this.activatedRoute.queryParams
      .pipe(
        tap((queryParams) => {
          const formData = castQueryParams(queryParams, Object.keys(this.form().controls));
          if (Object.keys(formData).length) {
            this.form().patchValue(formData);
          }
        }),
        takeUntilDestroyed(this.destroyRef),
      )
      .subscribe();

 this.form().markAllAsTouched();

if (this.form().invalid) {
  return;
}
this.submitted.emit();

// Note: Auto redirect
void this.router.navigate(getRoute(this.redirectTo()), {
  queryParams: getSearchQueryParams({ 
    ...this.activatedRoute.snapshot.queryParams, 
    ...this.form().getRawValue() 
  }),
});

mkdir src/app/search/ui/filters
mkdir src/app/search/ui/filters/lib
echo >src/app/search/ui/filters/index.ts

yarn ng g c search-filters

<baf-card>
  <ng-content />
  <button type="button" baf-button bafMode="primary" bafSize="medium" bafWidth="max" i18n="Search Filters|Apply" (click)="onApply()">
    Apply
  </button>
  <button type="button" baf-button bafMode="tertiary" bafSize="medium" bafWidth="max" i18n="Search Filters|Reset" (click)="onReset()">
    Reset
  </button>
</baf-card>

onApply(): void {
  void this.router.navigate([], {
    queryParams: {
      ...this.activatedRoute.snapshot.queryParams,
      refresh: new Date().toISOString(),
    },
  });
}

onReset(): void {
  this.form().reset();
}

mkdir src/app/search/avia/ui
mkdir src/app/search/avia/ui/form
mkdir src/app/search/avia/ui/form/lib
echo >src/app/search/avia/ui/form/index.ts

yarn ng g c search-avia-form

import { ChangeDetectionStrategy, Component } from '@angular/core';

import { PATHS } from '@baf/core';
import type { SearchAviaForm } from '@baf/search/avia/common';
import { initialSearchAviaFormGroup } from '@baf/search/avia/common';
import type { SearchFormOptions } from '@baf/search/common';
import {
  SearchDateComponent,
  SearchDestinationComponent,
  SearchGroupComponent,
  SearchPassengersComponent,
  SearchReverseComponent,
} from '@baf/search/ui/fields';
import { SearchFormComponent } from '@baf/search/ui/form';
import { ButtonComponent } from '@baf/ui/buttons';

@Component({
  selector: 'baf-search-avia-form',
  standalone: true,
  imports: [
    SearchFormComponent,
    SearchGroupComponent,
    SearchDestinationComponent,
    SearchReverseComponent,
    SearchDateComponent,
    SearchPassengersComponent,
    ButtonComponent,
  ],
  templateUrl: './search-avia-form.component.html',
  styleUrl: './search-avia-form.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class SearchAviaFormComponent {
  readonly form = initialSearchAviaFormGroup;
  readonly redirectTo = PATHS.searchAvia;
  readonly name = 'city_name';

  readonly options: SearchFormOptions<SearchAviaForm> = {
    from: { label: $localize`:Search Field:Where from`, id: 'from', types: ['city', 'airport'] },
    to: { label: $localize`:Search Field:Where to`, id: 'to', types: ['city', 'airport'] },
    startDate: { label: $localize`:Search Field:When`, id: 'startDate' },
    endDate: { label: $localize`:Search Field:When back`, id: 'endDate', startDate: this.form.controls.startDate },
    passengers: { label: $localize`:Search Field:Passengers`, id: 'passengers' },
  };
}

<baf-search-form [redirectTo]="redirectTo" [form]="form">
  <baf-search-group mode="destination">
    <baf-search-destination [control]="form.controls.from" [options]="options.from" />
    <baf-search-reverse [form]="form" />
    <baf-search-destination [control]="form.controls.to" [options]="options.to" />
  </baf-search-group>
  <baf-search-group mode="line">
    <baf-search-group mode="date">
      <baf-search-date [control]="form.controls.startDate" [options]="options.startDate" />
      <baf-search-date [control]="form.controls.endDate" [options]="options.endDate" />
    </baf-search-group>
    <baf-search-passengers [control]="form.controls.passengers" [options]="options.passengers" />
  </baf-search-group>
</baf-search-form>

mkdir src/app/search/avia/ui/filters
mkdir src/app/search/avia/ui/filters/lib
echo >src/app/search/avia/ui/filters/index.ts

yarn ng g c search-filters-avia

import { ChangeDetectionStrategy, Component } from '@angular/core';

import type { SearchAviaFilters } from '@baf/search/avia/common';
import { initialSearchAviaFiltersGroup } from '@baf/search/avia/common';
import type { SearchFormOptions } from '@baf/search/common';
import { SearchFiltersComponent } from '@baf/search/ui/filters';

import { FilterBaggageComponent } from './filter-baggage/filter-baggage.component';
import { FilterDirectComponent } from './filter-direct/filter-direct.component';

@Component({
  selector: 'baf-search-filters-avia',
  standalone: true,
  imports: [SearchFiltersComponent, FilterBaggageComponent, FilterDirectComponent],
  templateUrl: './search-filters-avia.component.html',
  styleUrl: './search-filters-avia.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class SearchFiltersAviaComponent {
  readonly form = initialSearchAviaFiltersGroup;

  readonly options: SearchFormOptions<SearchAviaFilters> = {
    baggage: { label: $localize`:Search Filter:Baggage`, id: 'baggage', name: 'baggage' },
    direct: { label: $localize`:Search Filter:Direct`, id: 'direct', name: 'direct' },
  };
}

<baf-search-filters [form]="form">
  <baf-filter-baggage [control]="form.controls.baggage" [options]="options.baggage" />
  <baf-filter-direct [control]="form.controls.direct" [options]="options.direct"/>
</baf-search-filters>

<baf-checkbox [control]="control()" [options]="options()">{{ options().label }}</baf-checkbox>

import { ChangeDetectionStrategy, Component, input } from '@angular/core';
import type { FormControl } from '@angular/forms';

import { ExtractChangesDirective } from '@baf/core';
import type { SearchFieldOptions } from '@baf/search/common';
import { CheckboxComponent } from '@baf/ui/checkbox';

export type FilterDirectOptions = SearchFieldOptions;

@Component({
  selector: 'baf-filter-direct',
  standalone: true,
  imports: [CheckboxComponent],
  templateUrl: './filter-direct.component.html',
  styleUrl: './filter-direct.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
  hostDirectives: [
    {
      directive: ExtractChangesDirective,
      inputs: ['control'],
    },
  ],
})
export class FilterDirectComponent {
  readonly control = input.required<FormControl<boolean>>();
  readonly options = input.required<FilterDirectOptions>();
}

export const homeRoutes: Routes = [
  {
    path: PATHS.homeAvia,
    title: $localize`:Home Title:Buy & Fly - Flights with 10% cashback`,
    loadComponent: () => import('@baf/home/page').then((m) => m.HomePageComponent),
    children: [
      {
        path: '',
        loadComponent: () => import('@baf/search/avia/ui/form').then((m) => m.SearchAviaFormComponent),
        outlet: 'form',
      },
    ],
  },
  // ...
]

    provideHttpClient(withFetch(),
    withInterceptors(httpInterceptors)),
    provideClientHydration(),
    provideCurrency('RUB'), 

mkdir src/app/search/hotels
mkdir src/app/search/hotels/common
mkdir src/app/search/hotels/common/lib
echo >src/app/search/hotels/common/index.ts

export interface SearchLocation {
  readonly cityName: string;
  readonly fullName: string;
  readonly countryCode: string;
  readonly countryName: string;
  readonly iata: string[];
  readonly id: string;
  readonly hotelsCount: string;
  readonly location: {
    readonly lat: string;
    readonly lon: string;
  };
  readonly _score: number;
}

export interface SearchHotelInfo {
  readonly label: string;
  readonly locationName: string;
  readonly locationId: string;
  readonly id: string;
  readonly fullName: string;
  readonly location: {
    readonly lat: string;
    readonly lon: string;
  };
}

export interface SearchHotelsResponse {
  readonly results: {
    readonly locations: SearchLocation[];
    readonly hotels: SearchHotelInfo[];
  };
  readonly status: string;
}

export interface SearchHotelDto {
  readonly locationId: number;
  readonly hotelId: number;
  readonly priceFrom: number;
  readonly priceAvg: number;
  readonly pricePercentile: Record<string, number>;
  readonly stars: number;
  readonly hotelName: string;
  readonly location: {
    readonly name: string;
    readonly country: string;
    readonly state: null | string;
    readonly geo: {
      readonly lat: number;
      readonly lon: number;
    };
  };
}

export interface SearchHotelDetails {
  readonly id: number;
  readonly cityId: number;
  readonly stars: number;
  readonly pricefrom: number;
  readonly rating: number;
  readonly popularity: number;
  readonly propertyType: number;
  readonly checkIn: string;
  readonly checkOut: string;
  readonly distance: number;
  readonly photoCount: number;
  readonly photos: {
    readonly url: string;
    readonly width: number;
    readonly height: number;
  }[];
  readonly photosByRoomType: Record<string, number>;
  readonly yearOpened: number;
  readonly yearRenovated: null | number;
  readonly cntRooms: number;
  readonly cntSuites: null | number;
  readonly cntFloors: number;
  readonly facilities: number[];
  readonly shortFacilities: string[];
  readonly location: {
    readonly lon: number;
    readonly lat: number;
  };
  readonly name: Record<string, string>;
  readonly address: Record<string, string>;
  readonly link: string;
  readonly poi_distance: unknown;
}

export interface SearchHotelsDetailsResponse {
  readonly pois: unknown[];
  readonly hotels: SearchHotelDetails[];
  readonly status: string;
}

export interface SearchHotel extends SearchHotelDto {
  readonly photos: {
    readonly url: string;
    readonly width: number;
    readonly height: number;
  }[];
}

import { FormControl, FormGroup } from '@angular/forms';

import type { FormFor } from '@baf/core';

export interface SearchHotelFilters {
  readonly breakfast: boolean;
  readonly freeCancellation: boolean;
  readonly fiveStars: boolean;
}

export type SearchHotelFiltersGroup = FormGroup<FormFor<SearchHotelFilters>>;

export const initialSearchHotelFiltersGroup: SearchHotelFiltersGroup = new FormGroup({
  breakfast: new FormControl(false, { nonNullable: true, validators: [] }),
  fiveStars: new FormControl(false, { nonNullable: true, validators: [] }),
  freeCancellation: new FormControl(false, { nonNullable: true, validators: [] }),
});

import { FormControl, FormGroup, Validators } from '@angular/forms';

import type { FormFor } from '@baf/core';
import type { SearchDestination } from '@baf/search/common';

export interface SearchHotelForm {
  readonly city: string | SearchDestination;
  readonly startDate: string;
  readonly endDate: string;
  readonly passengers: number | undefined;
}

export type SearchHotelFormGroup = FormGroup<FormFor<SearchHotelForm>>;

export const initialSearchHotelFormGroup: SearchHotelFormGroup = new FormGroup({
  city: new FormControl<string | SearchDestination>('', {
    nonNullable: true,
    validators: [Validators.required],
  }),
  startDate: new FormControl<string>('', {
    nonNullable: true,
    validators: [Validators.required],
  }),
  endDate: new FormControl<string>('', {
    nonNullable: true,
    validators: [],
  }),
  passengers: new FormControl<number | undefined>(undefined, {
    nonNullable: true,
    validators: [Validators.required, Validators.min(1), Validators.max(20)],
  }),
});

import { castQueryParams } from '@baf/core';

export interface SearchHotelsInfoOptions {
  readonly [key: string]: unknown;

  readonly query: string;
  readonly lang: string;
  readonly limit: number;
  readonly lookFor: string;
}

export function getSearchHotelsInfoOptions(queryParams: Record<string, unknown>, lang: string): SearchHotelsInfoOptions {
  const { city } = castQueryParams(queryParams);

  if (typeof city !== 'string') {
    throw new Error('Invalid search flight options');
  }

  const limit = !isNaN(Number(queryParams['limit'])) ? Number(queryParams['limit']) : 20;

  return {
    query: city,
    lang: lang.toLowerCase(),
    lookFor: 'hotel',
    limit,
  };
}

export interface SearchHotelsOptions {
  readonly [key: string]: unknown;

  readonly location: string;
  readonly limit: number;
  readonly currency: string;
  readonly token: string;
}

export function getSearchHotelsOptions(queryParams: Record<string, unknown>, token: string, currency: string): SearchHotelsOptions {
  const { city, startDate, endDate } = castQueryParams(queryParams);

  if (typeof city !== 'string' || typeof startDate !== 'string' || typeof endDate !== 'string') {
    throw new Error('Invalid search flight options');
  }

  const limit = !isNaN(Number(queryParams['limit'])) ? Number(queryParams['limit']) : 20;

  return {
    location: city,
    checkIn: startDate,
    checkOut: endDate,
    currency: currency.toLowerCase(),
    limit,
    token,
  };
}

mkdir src/app/search/hotels/services
mkdir src/app/search/hotels/services/lib
echo >src/app/search/hotels/services/index.ts

import { HttpClient } from '@angular/common/http';
import { DEFAULT_CURRENCY_CODE, inject, Injectable, LOCALE_ID, TransferState } from '@angular/core';
import type { Observable } from 'rxjs';
import { map } from 'rxjs';

import type { Environment } from '@baf/core';
import { castParams, ENV_DEFAULT, ENV_KEY } from '@baf/core';
import type {
  SearchHotel,
  SearchHotelDetails,
  SearchHotelDto,
  SearchHotelInfo,
  SearchHotelsDetailsResponse,
  SearchHotelsResponse,
} from '@baf/search/hotels/common';
import { getSearchHotelsInfoOptions, getSearchHotelsOptions } from '@baf/search/hotels/common';

@Injectable()
export class SearchHotelService {
  private readonly httpClient = inject(HttpClient);
  private readonly environment = inject(TransferState).get<Environment>(ENV_KEY, ENV_DEFAULT);
  private readonly localeId = inject(LOCALE_ID);
  private readonly currency = inject(DEFAULT_CURRENCY_CODE);

  findHotels(queryParams: Record<string, unknown>): Observable<SearchHotel[]> {
    const params = castParams(getSearchHotelsOptions(queryParams, this.environment.hotellookToken, this.currency));

    return this.httpClient.get<SearchHotelDto[]>('/api/hotels/cache.json', { params }).pipe(
      map((response) => {
        // На фронте так делать не нужно. Должен быть бэк, где будет собираться данные и кешироваться.
        // Это только для примера.
        return response.map((hotel) => ({
          ...hotel,
          photos: [
            {
              url: `https://photo.hotellook.com/image_v2/limit/h${hotel.hotelId}_0/320/240.auto`,
              width: 320,
              height: 240,
            },
            {
              url: `https://photo.hotellook.com/image_v2/limit/h${hotel.hotelId}_1/320/240.auto`,
              width: 320,
              height: 240,
            },
            {
              url: `https://photo.hotellook.com/image_v2/limit/h${hotel.hotelId}_2/320/240.auto`,
              width: 320,
              height: 240,
            },
            {
              url: `https://photo.hotellook.com/image_v2/limit/h${hotel.hotelId}_3/320/240.auto`,
              width: 320,
              height: 240,
            },
            {
              url: `https://photo.hotellook.com/image_v2/limit/h${hotel.hotelId}_4/320/240.auto`,
              width: 320,
              height: 240,
            },
            {
              url: `https://photo.hotellook.com/image_v2/limit/h${hotel.hotelId}_5/320/240.auto`,
              width: 320,
              height: 240,
            },
          ],
        }));
      }),
    );
  }

  findHotelsInfo(queryParams: Record<string, unknown>): Observable<SearchHotelInfo[]> {
    const params = castParams(getSearchHotelsInfoOptions(queryParams, this.localeId));

    return this.httpClient.get<SearchHotelsResponse>('/api/hotels/lookup.json', { params }).pipe(map(({ results }) => results.hotels));
  }

  getHotelsDetails(locationId: number): Observable<SearchHotelDetails[]> {
    const params = {
      locationId,
      token: this.environment.hotellookToken,
    };

    return this.httpClient.get<SearchHotelsDetailsResponse>('/api/hotels/static/hotels.json', { params }).pipe(map(({ hotels }) => hotels));
  }
}

mkdir src/app/search/hotels/ui
mkdir src/app/search/hotels/ui/forms
mkdir src/app/search/hotels/ui/forms/lib
echo >src/app/search/hotels/ui/forms/index.ts

<baf-search-form [redirectTo]="redirectTo" [form]="form">
  <baf-search-group mode="single">
    <baf-search-destination [control]="form.controls.city" [options]="options.city" />
  </baf-search-group>
  <baf-search-group mode="line">
    <baf-search-group mode="date">
      <baf-search-date [control]="form.controls.startDate" [options]="options.startDate" />
      <baf-search-date [control]="form.controls.endDate" [options]="options.endDate" />
    </baf-search-group>
    <baf-search-passengers [control]="form.controls.passengers" [options]="options.passengers" />
  </baf-search-group>
</baf-search-form>

import { ChangeDetectionStrategy, Component } from '@angular/core';

import { PATHS } from '@baf/core';
import type { SearchFormOptions } from '@baf/search/common';
import type { SearchHotelForm } from '@baf/search/hotels/common';
import { initialSearchHotelFormGroup } from '@baf/search/hotels/common';
import {
  SearchDateComponent,
  SearchDestinationComponent,
  SearchGroupComponent,
  SearchPassengersComponent,
  SearchReverseComponent,
} from '@baf/search/ui/fields';
import { SearchFormComponent } from '@baf/search/ui/form';
import { ButtonComponent } from '@baf/ui/buttons';

@Component({
  selector: 'baf-search-hotel-form',
  standalone: true,
  imports: [
    SearchFormComponent,
    SearchGroupComponent,
    SearchDestinationComponent,
    SearchReverseComponent,
    SearchDateComponent,
    SearchPassengersComponent,
    ButtonComponent,
  ],
  templateUrl: './search-hotel-form.component.html',
  styleUrl: './search-hotel-form.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class SearchHotelFormComponent {
  readonly form = initialSearchHotelFormGroup;
  readonly redirectTo = PATHS.searchHotel;

  readonly options: SearchFormOptions<SearchHotelForm> = {
    city: { label: $localize`:Search Field:City`, id: 'city', types: ['city'], key: 'name' },
    startDate: { label: $localize`:Search Field:When`, id: 'startDate' },
    endDate: { label: $localize`:Search Field:When back`, id: 'endDate', startDate: this.form.controls.startDate },
    passengers: { label: $localize`:Search Field:Guests`, id: 'passengers' },
  };
}

mkdir src/app/search/hotels/ui/filters
mkdir src/app/search/hotels/ui/filters/lib
echo >src/app/search/hotels/ui/filters/index.ts

<baf-search-filters [form]="form">
  <baf-filter-breakfast [control]="form.controls.breakfast" [options]="options.breakfast"></baf-filter-breakfast>
  <baf-filter-five-stars [control]="form.controls.fiveStars" [options]="options.fiveStars"></baf-filter-five-stars>
  <baf-filter-free-cancellation
    [control]="form.controls.freeCancellation"
    [options]="options.freeCancellation"
  ></baf-filter-free-cancellation>
</baf-search-filters>

import { ChangeDetectionStrategy, Component } from '@angular/core';

import type { SearchFormOptions } from '@baf/search/common';
import type { SearchHotelFilters } from '@baf/search/hotels/common';
import { initialSearchHotelFiltersGroup } from '@baf/search/hotels/common';
import { SearchFiltersComponent } from '@baf/search/ui/filters';

import { FilterBreakfastComponent } from './filter-breakfast/filter-breakfast.component';
import { FilterFiveStarsComponent } from './filter-five-stars/filter-five-stars.component';
import { FilterFreeCancellationComponent } from './filter-free-cancellation/filter-free-cancellation.component';

@Component({
  selector: 'baf-search-filters-hotels',
  standalone: true,
  imports: [SearchFiltersComponent, FilterBreakfastComponent, FilterFreeCancellationComponent, FilterFiveStarsComponent],
  templateUrl: './search-filters-hotels.component.html',
  styleUrl: './search-filters-hotels.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class SearchFiltersHotelsComponent {
  readonly form = initialSearchHotelFiltersGroup;

  readonly options: SearchFormOptions<SearchHotelFilters> = {
    breakfast: { label: $localize`:Search Filter:Breakfast`, id: 'breakfast', name: 'breakfast' },
    fiveStars: { label: $localize`:Search Filter:Five Stars`, id: 'fiveStars', name: 'fiveStars' },
    freeCancellation: { label: $localize`:Search Filter:Free Cancellation`, id: 'freeCancellation', name: 'freeCancellation' },
  };
}

  {
    path: PATHS.homeHotels,
    title: $localize`:Home Title:Buy & Fly - Hotels with 10% cashback`,
    loadComponent: () => import('@baf/home/page').then((m) => m.HomePageComponent),
    children: [
      {
        path: '',
        loadComponent: () => import('@baf/search/hotels/ui/form').then((m) => m.SearchHotelFormComponent),
        outlet: 'form',
      },
    ],
  },

 {
    path: PATHS.homeRailways,
    title: $localize`:Home Title:Buy & Fly - Railways with 5% cashback`,
    loadComponent: () => import('@baf/home/page').then((m) => m.HomePageComponent),
    children: [
      {
        path: '',
        loadComponent: () => import('@baf/search/railways/ui/form').then((m) => m.SearchRailwayFormComponent),
        outlet: 'form',
      },
    ],
  },

{
  "i18n": {
    "sourceLocale": "en-US",
    "locales": {
      "ru": {
        "translation": "src/i18n/messages.xlf",
        "baseHref": ""
      }
    }
  }
}

yarn ng extract-i18n --out-file=src/i18n/source.xlf

mkdir src/app/search/page
mkdir src/app/search/page/lib
echo >src/app/search/page//index.ts

yarn ng g c search-page

<baf-container>
  <div class="form">
    <router-outlet name="form" />
  </div>
  <div class="row">
    <div class="column">
      <router-outlet name="filters" />
    </div>
    <div class="column">
      <router-outlet name="results" />
      <router-outlet name="map" />
    </div>
  </div>
  <router-outlet />
</baf-container>

@use 'src/stylesheets/device' as device;

.row {
  display: flex;
  flex-direction: column-reverse;

  @include device.media-tablet-up() {
    flex-direction: row;
  }
}

.column {
  @include device.media-tablet-up() {
    &:first-child {
      width: 33.333%;
      padding-right: 0.5rem;
    }
    &:last-child {
      width: 66.667%;
      padding-left: 0.5rem;
    }
  }
  @include device.media-web() {
    &:first-child {
      width: 25%;
    }
    &:last-child {
      width: 75%;
    }
  }
}

.form {
  margin: 1rem 0;
}

import { ChangeDetectionStrategy, Component } from '@angular/core';
import { RouterOutlet } from '@angular/router';

import { ContainerComponent } from '@baf/ui/container';

@Component({
  selector: 'baf-search-page',
  standalone: true,
  imports: [RouterOutlet, ContainerComponent],
  templateUrl: './search-page.component.html',
  styleUrl: './search-page.component.scss',
  changeDetection: ChangeDetectionStrategy.OnPush,
})
export class SearchPageComponent {}

{
  path: PATHS.search,
  loadChildren: () => import('./routes/search.routes').then((m) => m.searchRoutes),
},

import type { Routes } from '@angular/router';

import { PATHS, withChildNavigation } from '@baf/core';

export const searchRoutes: Routes = [
  {
    path: PATHS.searchAvia,
    title: $localize`:Search Page:Search for cheap flights`,
    loadComponent: () => import('@baf/search/page').then((m) => m.SearchPageComponent),
    children: [
      {
        path: '',
        loadComponent: () => import('@baf/search/avia/ui/form').then((m) => m.SearchAviaFormComponent),
        outlet: 'form',
      },
      {
        path: '',
        loadComponent: () => import('@baf/search/avia/ui/results').then((m) => m.SearchResultsAviaComponent),
        outlet: 'results',
      },
      {
        path: '',
        loadComponent: () => import('@baf/search/avia/ui/filters').then((m) => m.SearchFiltersAviaComponent),
        outlet: 'filters',
      },
    ],
  },
  {
    path: PATHS.searchHotel,
    title: $localize`:Search Page:Search for cheap hotels`,
    loadComponent: () => import('@baf/search/page').then((m) => m.SearchPageComponent),
    children: [
      {
        path: '',
        loadComponent: () => import('@baf/search/hotels/ui/form').then((m) => m.SearchHotelFormComponent),
        outlet: 'form',
      },
      {
        path: '',
        loadComponent: () => import('@baf/search/hotels/ui/results').then((m) => m.SearchHotelsResultComponent),
        outlet: 'results',
      },
      {
        path: '',
        loadComponent: () => import('@baf/search/hotels/ui/filters').then((m) => m.SearchFiltersHotelsComponent),
        outlet: 'filters',
      },
    ],
  },
  {
    path: PATHS.searchTour,
    title: $localize`:Search Page:Search for cheap tours`,
    loadComponent: () => import('@baf/development/page').then((m) => m.DevelopmentPageComponent),
  },
  {
    path: PATHS.searchRailway,
    title: $localize`:Search Page:Search for cheap railways`,
    loadComponent: () => import('@baf/development/page').then((m) => m.DevelopmentPageComponent),
  },
].map(withChildNavigation(PATHS.search));