import { ElementRef, TemplateRef, EventEmitter } from '@angular/core';
import { ControlValueAccessor } from '@angular/forms';
import { Observable } from 'rxjs';
import { FileInputConfig } from './file-input.config';
import * as i0 from "@angular/core";
export interface UploadedFile {
    isLoading?: boolean;
    imageId: string;
    file: File;
}
export declare class UsaFileInputComponent implements ControlValueAccessor {
    private fileInputConfig;
    fileInputElement: ElementRef;
    multiple: boolean;
    acceptFileType: string;
    id: string;
    hint: string | TemplateRef<any>;
    disabled: boolean;
    selectedFiles: File[];
    clearFilesOnAdd: boolean;
    displayFileInfo: boolean;
    uploadRequest: (file: File) => Observable<any>;
    selectedFilesChange: EventEmitter<File[]>;
    uploadError: EventEmitter<File>;
    DRAG_OVER_STATE: boolean;
    ERROR_STATE: boolean;
    inputFiles: UploadedFile[];
    private onChange;
    private onTouched;
    constructor(fileInputConfig: FileInputConfig);
    onDragLeave(): void;
    onDragOver(): void;
    onFileDrop(): void;
    onNewFilesUpload($event: any): void;
    removeFile(file: File): void;
    clearFiles(): void;
    onUploadError(file: File): void;
    trackLoadedFilesBy(index: number, item: UploadedFile): string;
    registerOnChange(fn: any): void;
    registerOnTouched(fn: any): void;
    writeValue(files: File[]): void;
    setDisabledState(isDisabled: boolean): void;
    private validateFileType;
    /**
     * Given a file and list of pre-uploaded files, generates and returns an id for the file.
     * If file already exists in pre-uploaded files list, then the id will simply be appended with
     * a counter to ensure uniqueness
     * @param file - File to generate id for
     * @param preExistingFiles - List of files that are uploaded and already have an id
     * @returns An id for the image
     */
    private getImageId;
    /**
     * Creates an ID name for each file that strips all invalid characters.
     * @param {string} name - name of the file added to file input
     * @returns {string} same characters as the name with invalid chars removed
     */
    private _makeSafeForID;
    static ɵfac: i0.ɵɵFactoryDeclaration<UsaFileInputComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<UsaFileInputComponent, "usa-file-input", never, { "multiple": { "alias": "multiple"; "required": false; }; "acceptFileType": { "alias": "acceptFileType"; "required": false; }; "id": { "alias": "id"; "required": false; }; "hint": { "alias": "hint"; "required": false; }; "disabled": { "alias": "disabled"; "required": false; }; "selectedFiles": { "alias": "selectedFiles"; "required": false; }; "clearFilesOnAdd": { "alias": "clearFilesOnAdd"; "required": false; }; "displayFileInfo": { "alias": "displayFileInfo"; "required": false; }; "uploadRequest": { "alias": "uploadRequest"; "required": false; }; }, { "selectedFilesChange": "selectedFilesChange"; "uploadError": "uploadError"; }, never, never, false, never>;
}