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import { PictureLightboxService } from '../../../../services/pictures/picture-lightbox.service';
import { PictureService } from '../../../../services/pictures/picture.service';
import { ErrorComponent } from '../../../../shared/components/error/error.component';
import { SidebarActionComponent } from '../../../../shared/components/sidebar-action/sidebar-action.component';
import { PendingBannerComponent } from '../../components/pending-banner/pending-banner.component';
import {
ReplaceFileDialogData,
ReplaceFileDialogResult,
} from '../../components/replace-file-dialog/replace-file-dialog.component';
import { TITLE_MAX_LENGTH, TITLE_MIN_LENGTH } from '../../constants/picture.constants';
import { PendingAction } from '../../models/pending.model';
import { PictureResolveResult } from '../../resolvers/picture.resolver';
import { isPlatformBrowser } from '@angular/common';
import { HttpErrorResponse } from '@angular/common/http';
import {
ChangeDetectionStrategy,
Component,
computed,
DestroyRef,
effect,
ElementRef,
inject,
PLATFORM_ID,
signal,
viewChild,
} from '@angular/core';
import { takeUntilDestroyed, toObservable, toSignal } from '@angular/core/rxjs-interop';
import { FormControl, ReactiveFormsModule, Validators } from '@angular/forms';
import { ActivatedRoute, Router, RouterLink } from '@angular/router';
import { LoggerService, NotificationService, WINDOW } from '@drevo-web/core';
import { Picture, PictureArticle, PicturePending } from '@drevo-web/shared';
import { ConfirmationService, FormatDatePipe, ModalService, SpinnerComponent } from '@drevo-web/ui';
import { merge, Observable, of, startWith, Subject, switchMap } from 'rxjs';
import { catchError, filter, finalize, map, tap } from 'rxjs/operators';
const MAX_FILE_SIZE_BYTES = 500 * 1024;
const ALLOWED_FILE_TYPE = 'image/jpeg';
@Component({
selector: 'app-picture-detail',
imports: [
ErrorComponent,
ReactiveFormsModule,
SidebarActionComponent,
PendingBannerComponent,
FormatDatePipe,
RouterLink,
SpinnerComponent,
],
templateUrl: './picture-detail.component.html',
styleUrl: './picture-detail.component.scss',
changeDetection: ChangeDetectionStrategy.OnPush,
})
export class PictureDetailComponent {
private readonly route = inject(ActivatedRoute);
private readonly authService = inject(AuthService);
private readonly lightboxService = inject(PictureLightboxService);
private readonly pictureService = inject(PictureService);
private readonly notificationService = inject(NotificationService);
private readonly modalService = inject(ModalService);
private readonly confirmationService = inject(ConfirmationService);
private readonly router = inject(Router);
private readonly logger = inject(LoggerService).withContext('PictureDetail');
private readonly window = inject(WINDOW);
private readonly platformId = inject(PLATFORM_ID);
private readonly destroyRef = inject(DestroyRef);
private readonly titleInputRef = viewChild<ElementRef<HTMLTextAreaElement>>('titleInput');
private readonly fileInputRef = viewChild<ElementRef<HTMLInputElement>>('fileInput');
private readonly resolveResult = toSignal(
this.route.data.pipe(map(data => data['picture'] as PictureResolveResult)),
);
private readonly user = toSignal(this.authService.user$);
readonly picture = computed(() => {
const result = this.resolveResult();
return typeof result === 'object' ? result : undefined;
});
readonly isLoadError = computed(() => this.resolveResult() === 'load-error');
readonly canEdit = computed(() => this.user()?.permissions.canEdit ?? false);
readonly canModerate = computed(() => this.user()?.permissions.canModerate ?? false);
readonly currentUserName = computed(() => this.user()?.name ?? '');
// Title inline editing
readonly titleControl = new FormControl('', {
nonNullable: true,
validators: [
Validators.required,
Validators.minLength(TITLE_MIN_LENGTH),
Validators.maxLength(TITLE_MAX_LENGTH),
],
});
private readonly _isEditingTitle = signal(false);
private readonly _isSavingTitle = signal(false);
private readonly _titleOverride = signal<string | undefined>(undefined);
private blurHandledByKeyboard = false;
readonly isEditingTitle = this._isEditingTitle.asReadonly();
readonly isSavingTitle = this._isSavingTitle.asReadonly();
readonly displayTitle = computed(() => this._titleOverride() ?? this.picture()?.title ?? '');
// File replacement
private readonly _isUploading = signal(false);
private readonly _imageOverride = signal<string | undefined>(undefined);
readonly isUploading = this._isUploading.asReadonly();
readonly displayImageUrl = computed(() => this._imageOverride() ?? this.picture()?.imageUrl ?? '');
// Deletion
private readonly _isDeleting = signal(false);
readonly isDeleting = this._isDeleting.asReadonly();
// Articles
private readonly pictureId = computed(() => this.picture()?.id);
private readonly _refreshPendingSubject = new Subject<void>();
private readonly _pendingActionInProgress = signal<number | undefined>(undefined);
readonly pendingActionInProgress = this._pendingActionInProgress.asReadonly();
readonly pendingChanges = toSignal(
merge(toObservable(this.pictureId), this._refreshPendingSubject.pipe(map(() => this.pictureId()))).pipe(
switchMap(id =>
id
? this.pictureService.getPicturePending(id).pipe(
catchError((error: unknown) => {
this.logger.error('Failed to load picture pending changes', error);
return of([] as readonly PicturePending[]);
}),
)
: of([] as readonly PicturePending[]),
),
),
{ initialValue: [] as readonly PicturePending[] },
);
private readonly articlesResult = toSignal(
toObservable(this.pictureId).pipe(
switchMap(id =>
id
? this.pictureService.getPictureArticles(id).pipe(
map(articles => ({ articles, loading: false as const })),
startWith({
articles: undefined as readonly PictureArticle[] | undefined,
loading: true as const,
}),
catchError((error: unknown) => {
this.logger.error('Failed to load articles', error);
return of({
articles: undefined as readonly PictureArticle[] | undefined,
loading: false as const,
});
}),
)
: of({ articles: undefined as readonly PictureArticle[] | undefined, loading: false as const }),
),
),
);
readonly articles = computed(() => this.articlesResult()?.articles);
readonly articlesLoading = computed(() => this.articlesResult()?.loading ?? false);
readonly canDelete = computed(() => {
if (this._isDeleting() || this._isUploading() || this.articlesLoading()) return false;
const articleList = this.articles();
return articleList?.length === 0;
});
constructor() {
effect(() => {
this.picture(); // track picture changes
this._titleOverride.set(undefined);
this._imageOverride.set(undefined);
this._isEditingTitle.set(false);
});
effect(() => {
const el = this.titleInputRef()?.nativeElement;
if (el) {
// Auto-size: shrink to 0, then expand to scrollHeight (min 4 rows via CSS)
el.style.height = '0';
el.style.height = `${el.scrollHeight}px`;
el.focus();
el.select();
}
});
}
startTitleEdit(): void {
if (!this.canEdit() || this._isEditingTitle()) return;
this.blurHandledByKeyboard = false;
this.titleControl.setValue(this.displayTitle());
this.titleControl.markAsPristine();
this._isEditingTitle.set(true);
}
cancelTitleEdit(): void {
Iif (this._isSavingTitle()) return;
this.blurHandledByKeyboard = true;
this._isEditingTitle.set(false);
}
onTitleBlur(): void {
Iif (this.blurHandledByKeyboard) {
this.blurHandledByKeyboard = false;
return;
}
if (this.titleControl.invalid) {
this._isEditingTitle.set(false);
return;
}
this.saveTitleEdit();
}
saveTitleEdit(): void {
if (this.titleControl.invalid || this._isSavingTitle()) return;
const value = this.titleControl.value.trim();
const pic = this.picture();
Iif (!pic) return;
if (value === this.displayTitle()) {
this.cancelTitleEdit();
return;
}
this._isSavingTitle.set(true);
this.pictureService
.updateTitle(pic.id, value)
.pipe(takeUntilDestroyed(this.destroyRef))
.subscribe({
next: result => {
this._isSavingTitle.set(false);
this._isEditingTitle.set(false);
if (result.picture) {
this._titleOverride.set(result.picture.title);
this.notificationService.success('Описание обновлено');
} else Eif (result.pending) {
this.refreshPending();
this.notificationService.info('Изменение отправлено на модерацию');
}
this.logger.info('Title update submitted', { id: pic.id, title: value });
},
error: (err: unknown) => {
this._isSavingTitle.set(false);
this.logger.error('Failed to update title', err);
this.notificationService.error('Не удалось обновить описание');
},
});
}
onTitleEnter(event: Event): void {
event.preventDefault();
this.blurHandledByKeyboard = true;
this.saveTitleEdit();
}
autoResizeTextarea(): void {
const el = this.titleInputRef()?.nativeElement;
if (el) {
el.style.height = '0';
el.style.height = `${el.scrollHeight}px`;
}
}
onImageClick(): void {
const pic = this.picture();
Iif (!pic) return;
this.logger.info('Opening lightbox from detail', { id: pic.id });
const imageOverride = this._imageOverride();
if (imageOverride) {
this.lightboxService.openWithPicture({
...pic,
title: this.displayTitle(),
imageUrl: imageOverride,
});
} else {
this.lightboxService.open(pic.id);
}
}
editPicture(): void {
if (this._isUploading()) return;
this.fileInputRef()?.nativeElement.click();
}
onFileSelected(event: Event): void {
const input = event.target as HTMLInputElement;
const file = input.files?.[0];
// Reset input so the same file can be re-selected
input.value = '';
Iif (!file) return;
if (file.type !== ALLOWED_FILE_TYPE) {
this.notificationService.error('Допустимый формат — только JPEG');
return;
}
if (file.size > MAX_FILE_SIZE_BYTES) {
this.notificationService.error('Максимальный размер файла — 500 КБ');
return;
}
const previewUrl = URL.createObjectURL(file);
this.modalService
.open<ReplaceFileDialogData, ReplaceFileDialogResult>(
() =>
import('../../components/replace-file-dialog/replace-file-dialog.component').then(
m => m.ReplaceFileDialogComponent,
),
{
data: { currentTitle: this.displayTitle(), previewUrl },
width: '500px',
},
)
.pipe(takeUntilDestroyed(this.destroyRef))
.subscribe(result => {
if (result) {
this.uploadFile(file, result.title, previewUrl);
} else {
URL.revokeObjectURL(previewUrl);
}
});
}
private uploadFile(file: File, title: string, previewUrl: string): void {
const pic = this.picture();
Iif (!pic) {
URL.revokeObjectURL(previewUrl);
return;
}
const formData = new FormData();
formData.append('file', file);
formData.append('pic_title', title);
this._isUploading.set(true);
this.pictureService
.editPicture(pic.id, formData)
.pipe(
takeUntilDestroyed(this.destroyRef),
finalize(() => {
this._isUploading.set(false);
URL.revokeObjectURL(previewUrl);
}),
)
.subscribe({
next: result => {
if (result.picture) {
this._titleOverride.set(result.picture.title);
this._imageOverride.set(result.picture.imageUrl);
this.notificationService.success('Файл заменён');
} else Eif (result.pending) {
this.refreshPending();
this.notificationService.info('Изменение отправлено на модерацию');
}
this.logger.info('File replacement submitted', { id: pic.id });
},
error: (err: unknown) => {
this.logger.error('Failed to replace file', err);
this.notificationService.error('Не удалось заменить файл');
},
});
}
deletePicture(): void {
const pic = this.picture();
Iif (!pic || !this.canDelete()) return;
this.confirmationService
.open({
title: 'Удаление иллюстрации',
message: 'Вы уверены, что хотите удалить эту иллюстрацию?',
buttons: [
{ key: 'cancel', label: 'Отмена' },
{ key: 'confirm', label: 'Удалить', accent: 'danger' },
],
disableClose: true,
})
.pipe(
filter(result => result === 'confirm'),
tap(() => this._isDeleting.set(true)),
switchMap(() =>
this.pictureService.deletePicture(pic.id).pipe(finalize(() => this._isDeleting.set(false))),
),
takeUntilDestroyed(this.destroyRef),
)
.subscribe({
next: editResult => {
if (editResult.picture) {
this.notificationService.success('Иллюстрация удалена');
this.router.navigate(['/pictures']);
} else Eif (editResult.pending) {
this.refreshPending();
this.notificationService.info('Запрос на удаление отправлен на модерацию');
}
this.logger.info('Delete submitted', { id: pic.id });
},
error: (err: unknown) => {
if (err instanceof HttpErrorResponse && err.status === 409) {
this.notificationService.error('Иллюстрация используется в статьях и не может быть удалена');
} else {
this.notificationService.error('Не удалось удалить иллюстрацию');
}
this.logger.error('Failed to delete picture', err);
},
});
}
openPendingImage(pending: PicturePending): void {
const picture = this.picture();
Iif (!picture || !pending.pendingImageUrl) return;
const lightboxPicture: Picture = {
...picture,
id: pending.pictureId,
title: pending.title ?? pending.currentTitle,
user: pending.user,
date: pending.date,
width: pending.width ?? pending.currentWidth,
height: pending.height ?? pending.currentHeight,
imageUrl: pending.pendingImageUrl,
thumbnailUrl: pending.pendingImageUrl,
};
this.lightboxService.openWithPicture(lightboxPicture);
}
copyInsertCode(): void {
const pic = this.picture();
Iif (!pic || !isPlatformBrowser(this.platformId)) {
return;
}
const code = `@${pic.id}@`;
this.window?.navigator?.clipboard
.writeText(code)
.then(() => {
this.notificationService.success('Код скопирован');
this.logger.info('Insert code copied', { id: pic.id, code });
})
.catch((error: unknown) => {
this.logger.error('Failed to copy insert code', error);
this.notificationService.error(`Не удалось скопировать код ${code}`);
});
}
private refreshPending(): void {
this._refreshPendingSubject.next();
}
private reloadCurrentPage(): void {
const currentUrl = this.router.url;
this.router
.navigateByUrl('/', { skipLocationChange: true })
.then(success => {
Eif (success) {
return this.router.navigateByUrl(currentUrl);
}
this.logger.error('Page reload: intermediate navigation was cancelled');
return false;
})
.catch((error: unknown) => {
this.logger.error('Page reload failed', error);
});
}
runPendingAction(pending: PicturePending, pendingAction: PendingAction): void {
Iif (this._pendingActionInProgress() === pending.id) return;
let request$: Observable<void>;
let successMessage: string;
let errorMessage: string;
let logMessage: string;
switch (pendingAction) {
case 'cancel':
request$ = this.pictureService.cancelPending(pending.id);
successMessage = 'Изменение отменено';
errorMessage = 'Не удалось отменить изменение';
logMessage = 'Pending cancellation submitted';
break;
case 'approve':
request$ = this.pictureService.approvePending(pending.id);
successMessage = 'Изменение одобрено';
errorMessage = 'Не удалось одобрить изменение';
logMessage = 'Pending approval submitted';
break;
case 'reject':
request$ = this.pictureService.rejectPending(pending.id);
successMessage = 'Изменение отклонено';
errorMessage = 'Не удалось отклонить изменение';
logMessage = 'Pending rejection submitted';
break;
}
this._pendingActionInProgress.set(pending.id);
request$
.pipe(
takeUntilDestroyed(this.destroyRef),
finalize(() => this._pendingActionInProgress.set(undefined)),
)
.subscribe({
next: () => {
this.notificationService.success(successMessage);
this.logger.info(logMessage, { pendingId: pending.id, pictureId: pending.pictureId });
Iif (pendingAction === 'approve' && pending.pendingType === 'delete') {
this.router.navigate(['/pictures']);
return;
}
this.reloadCurrentPage();
},
error: (error: unknown) => {
if (error instanceof HttpErrorResponse && error.status === 404) {
const notFoundMessage =
pendingAction === 'cancel'
? 'Решение по этому предложению уже принято'
: 'Решение по этому предложению уже принято, либо пользователь отменил предложение';
this.notificationService.info(notFoundMessage);
if (pendingAction === 'approve' && pending.pendingType === 'delete') {
this.router.navigate(['/pictures']);
} else {
this.reloadCurrentPage();
}
this.logger.info('Pending action returned 404', {
pendingId: pending.id,
action: pendingAction,
});
return;
}
this.notificationService.error(errorMessage);
this.logger.error(logMessage, error);
},
});
}
}
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