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* Copyright (c) Siemens 2016 - 2025
* SPDX-License-Identifier: MIT
*/
import {
booleanAttribute,
ChangeDetectionStrategy,
Component,
computed,
input,
output,
viewChild
} from '@angular/core';
import { addIcons, elementUpload, SiIconComponent } from '@siemens/element-ng/icon';
import { SiTranslatePipe, t } from '@siemens/element-translate-ng/translate';
import { SiFileUploadDirective, FileUploadError } from './si-file-upload.directive';
import { UploadFile } from './si-file-uploader.model';
@Component({
selector: 'si-file-dropzone',
imports: [SiIconComponent, SiTranslatePipe, SiFileUploadDirective],
templateUrl: './si-file-dropzone.component.html',
styleUrl: './si-file-dropzone.component.scss',
changeDetection: ChangeDetectionStrategy.OnPush
})
export class SiFileDropzoneComponent {
/**
* Text or translation key of the input file selector (is combined with the `uploadTextRest`).
*
* @defaultValue
* ```
* t(() => $localize`:@@SI_FILE_UPLOADER.FILE_SELECT:click to upload`)
* ```
*/
readonly uploadTextFileSelect = input(
t(() => $localize`:@@SI_FILE_UPLOADER.FILE_SELECT:click to upload`)
);
/**
* Text or translation key of the drag&drop field (is combined with the `uploadTextFileSelect`).
*
* @defaultValue
* ```
* t(() => $localize`:@@SI_FILE_UPLOADER.DROP:Drop files here or`)
* ```
*/
readonly uploadDropText = input(t(() => $localize`:@@SI_FILE_UPLOADER.DROP:Drop files here or`));
/**
* Text or translation key for max file size.
*
* @defaultValue
* ```
* t(() => $localize`:@@SI_FILE_UPLOADER.MAX_SIZE:Maximum upload size`)
* ```
*/
readonly maxFileSizeText = input(
t(() => $localize`:@@SI_FILE_UPLOADER.MAX_SIZE:Maximum upload size`)
);
/**
* Text or translation key for accepted types.
*
* @defaultValue
* ```
* t(() => $localize`:@@SI_FILE_UPLOADER.ACCEPTED_FILE_TYPES:Accepted file types`)
* ```
*/
readonly acceptText = input(
t(() => $localize`:@@SI_FILE_UPLOADER.ACCEPTED_FILE_TYPES:Accepted file types`)
);
/**
* Text or translation key of message title if incorrect file type is dragged / dropped.
*
* @defaultValue
* ```
* t(() => $localize`:@@SI_FILE_UPLOADER.ERROR_FILE_TYPE:Incorrect file type selected`)
* ```
*/
readonly errorTextFileType = input(
t(() => $localize`:@@SI_FILE_UPLOADER.ERROR_FILE_TYPE:Incorrect file type selected`)
);
/**
* Message or translation key if file exceeds the maximum file size limit.
*
* @defaultValue
* ```
* t(() => $localize`:@@SI_FILE_UPLOADER.ERROR_FILE_SIZE_EXCEEDED:File exceeds allowed maximum size`)
* ```
*/
readonly errorTextFileMaxSize = input(
t(
() =>
$localize`:@@SI_FILE_UPLOADER.ERROR_FILE_SIZE_EXCEEDED:File exceeds allowed maximum size`
)
);
/**
* Define which file types are suggested in file browser.
* @see https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#attr-accept
*/
readonly accept = input<string>();
/**
* Define maximal allowed file size in bytes.
*/
readonly maxFileSize = input<number>();
/**
* Defines whether the file input allows selecting multiple files.
* When {@link directoryUpload} is enabled, this will have no effect.
*
* @defaultValue false
*/
readonly multiple = input(false, { transform: booleanAttribute });
/**
* Event emitted when valid files are added.
* Invalid files are also included here, but with status 'invalid' and an errorText describing why they were ignored.
*/
readonly filesAdded = output<UploadFile[]>();
/**
* Event emitted when file validation errors occur, including files that were ignored due to size or type.
*/
readonly fileError = output<FileUploadError>();
/**
* Enable directory upload.
*
* @defaultValue false
*/
readonly directoryUpload = input(false, { transform: booleanAttribute });
protected readonly maxFileSizeString = computed(() => {
const maxFileSize = this.maxFileSize();
return maxFileSize ? this.fileUploadDirective().fileSizeToString(maxFileSize) : '';
});
protected readonly icons = addIcons({ elementUpload });
protected dragOver = false;
private readonly fileUploadDirective = viewChild.required(SiFileUploadDirective);
protected dropHandler(event: DragEvent): void {
event.preventDefault();
if (this.directoryUpload()) {
this.fileUploadDirective().handleItems(event.dataTransfer!.items);
} else {
this.fileUploadDirective().handleFiles(event.dataTransfer!.files);
}
this.dragOver = false;
}
protected dragOverHandler(event: DragEvent): void {
event.preventDefault();
event.stopPropagation();
this.dragOver = true;
}
protected inputEnterHandler(): void {
this.fileUploadDirective().triggerClick();
}
protected onFilesAdded(files: UploadFile[]): void {
this.filesAdded.emit(files);
}
protected onFileError(error: FileUploadError): void {
this.fileError.emit(error);
}
/**
* Reset all the files inside the native file input (and therefore the dropzone).
*/
reset(): void {
this.fileUploadDirective().reset();
}
}
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