fctrlx-angular-file-reader
Version:
Angular library that helps convert file (from input[type=file]) to base64/arrayBuffer/text using FileReader API.
175 lines • 12.7 kB
JavaScript
/**
* @fileoverview added by tsickle
* @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
*/
export class Base {
/**
* @param {?} name
* @param {?} element
*/
constructor(name, element) {
this.TYPE_FILE = 'file';
this.converted = [];
this.currentIndex = 0;
this.directiveName = name;
this.element = element;
}
/**
* @return {?}
*/
ngOnInit() {
if (this.type === this.TYPE_FILE && this.isSupported) {
this.element.nativeElement.addEventListener('change', this.filesChanged.bind(this), false);
}
else {
/** @type {?} */
let msg = this.directiveName;
if (!this.isSupported) {
msg += ' is not supported by your browser.';
}
else {
msg += ' working only with input type=file.';
}
console.warn(msg, this.element.nativeElement);
}
}
/**
* @param {?} event
* @param {?} readerHandleFn
* @param {?} saveKey
* @return {?}
*/
filesChanged(event, readerHandleFn, saveKey) {
/** @type {?} */
const files = ((/** @type {?} */ (event.target))).files;
this.converted = [];
this.currentIndex = 0;
Object.keys(files).forEach((/**
* @param {?} key
* @return {?}
*/
(key) => {
/** @type {?} */
const reader = new FileReader();
const { name, size, type } = files[key];
reader.onloadend = (/**
* @param {?} file
* @return {?}
*/
(file) => {
this.store(file, saveKey);
});
reader.onerror = (/**
* @param {?} event
* @return {?}
*/
(event) => {
this.handleError(event);
});
reader.onprogress = (/**
* @param {?} event
* @return {?}
*/
(event) => {
this.handleProgress(event);
});
reader.onabort = (/**
* @return {?}
*/
() => this.handleAbort());
this.converted.push({ name, size, type });
reader[readerHandleFn](files[key]);
}));
this.filesChange.next(this.isMultiple ? this.converted : this.converted[0]);
}
/**
* @param {?} event
* @return {?}
*/
handleError(event) {
this.onError.next(event.target.error.message || 'Something went wrong');
}
/**
* @param {?} event
* @return {?}
*/
handleProgress(event) {
if (event.lengthComputable) {
this.onProgress.next(Math.round((event.loaded / event.total) * 100));
}
}
/**
* @return {?}
*/
handleAbort() {
this.onAbort.next('read cancelled');
}
/**
* @param {?} file
* @param {?} key
* @return {?}
*/
store(file, key) {
this.converted[this.currentIndex][key] = file.target.result;
this.currentIndex = this.currentIndex + 1;
}
/**
* @return {?}
*/
ngOnDestroy() {
this.element.nativeElement.removeEventListener('change', this.filesChanged.bind(this), false);
}
/**
* @return {?}
*/
get isSupported() {
return !!(((/** @type {?} */ (window))).File && ((/** @type {?} */ (window))).FileReader &&
((/** @type {?} */ (window))).FileList && window.Blob);
}
/**
* @return {?}
*/
get isMultiple() {
return !(typeof this.multiple === 'undefined');
}
}
if (false) {
/** @type {?} */
Base.prototype.type;
/** @type {?} */
Base.prototype.multiple;
/** @type {?} */
Base.prototype.filesChange;
/** @type {?} */
Base.prototype.onProgress;
/** @type {?} */
Base.prototype.onError;
/** @type {?} */
Base.prototype.onAbort;
/**
* @type {?}
* @private
*/
Base.prototype.TYPE_FILE;
/**
* @type {?}
* @private
*/
Base.prototype.directiveName;
/**
* @type {?}
* @private
*/
Base.prototype.element;
/**
* @type {?}
* @private
*/
Base.prototype.converted;
/**
* @type {?}
* @private
*/
Base.prototype.currentIndex;
}
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{\n  ElementRef,\n  EventEmitter,\n  OnDestroy,\n  OnInit,\n} from '@angular/core';\nimport { Converted } from '../models/converted';\n\nexport class Base implements OnInit, OnDestroy {\n  public type: string;\n  public multiple: undefined | null | string | boolean;\n  public filesChange: EventEmitter<any>;\n  public onProgress: EventEmitter<any>;\n  public onError: EventEmitter<any>;\n  public onAbort: EventEmitter<any>;\n\n  private readonly TYPE_FILE: string = 'file';\n  private readonly directiveName: string;\n\n  private element: ElementRef;\n  private converted: Converted[]  = [];\n  private currentIndex: number = 0;\n\n  constructor(name: string, element: ElementRef) {\n    this.directiveName = name;\n    this.element = element;\n  }\n\n  ngOnInit(): void {\n    if (this.type === this.TYPE_FILE && this.isSupported) {\n      this.element.nativeElement.addEventListener('change', this.filesChanged.bind(this), false);\n    } else {\n      let msg: string = this.directiveName;\n\n      if (!this.isSupported) {\n        msg += ' is not supported by your browser.';\n      } else {\n        msg += ' working only with input type=file.';\n      }\n\n      console.warn(msg, this.element.nativeElement);\n    }\n  }\n\n  filesChanged(event: Event, readerHandleFn: string, saveKey: string): void {\n    const files = (<HTMLInputElement>event.target).files;\n\n    this.converted = [];\n    this.currentIndex = 0;\n\n    Object.keys(files).forEach((key: string) => {\n      const reader = new FileReader();\n      const { name, size, type } = files[key];\n\n      reader.onloadend = (file) => {\n        this.store(file, saveKey);\n      };\n\n      reader.onerror = (event) => {\n        this.handleError(event);\n      };\n\n      reader.onprogress = (event) => {\n        this.handleProgress(event);\n      };\n\n      reader.onabort = () => this.handleAbort();\n\n      this.converted.push({ name, size, type });\n\n      reader[readerHandleFn](files[key]);\n    });\n\n    this.filesChange.next(this.isMultiple ? this.converted : this.converted[0]);\n  }\n\n  handleError(event: any): void {\n    this.onError.next(event.target.error.message || 'Something went wrong');\n  }\n\n  handleProgress(event: any): void {\n    if (event.lengthComputable) {\n      this.onProgress.next(Math.round((event.loaded / event.total) * 100));\n    }\n  }\n\n  handleAbort(): void {\n    this.onAbort.next('read cancelled');\n  }\n\n  store(file: { target }, key: string): void {\n    this.converted[this.currentIndex][key] = file.target.result;\n    this.currentIndex = this.currentIndex + 1;\n  }\n\n  ngOnDestroy(): void {\n    this.element.nativeElement.removeEventListener('change', this.filesChanged.bind(this), false);\n  }\n\n  get isSupported(): boolean {\n    return !!((window as any).File && (window as any).FileReader &&\n              (window as any).FileList && window.Blob);\n  }\n\n  get isMultiple(): boolean {\n    return !(typeof this.multiple === 'undefined');\n  }\n}\n"]}