@nghacks/uploader
Version:
Image and file uploader for angular
153 lines • 15.8 kB
JavaScript
import { __awaiter } from "tslib";
import { Input, Output, EventEmitter, Component, HostListener } from '@angular/core';
import { FormControl } from '@angular/forms';
import { UploaderService } from '../../services/uploader.service';
export class BaseUploaderComponent {
constructor(_uploaderService) {
this._uploaderService = _uploaderService;
this.fileInputChange = new EventEmitter();
this.formCtrl = new FormControl();
/**
* @description maximum file size in kb (kilobyte)
* @default 5000 (5mb)
*/
this.maxSize = 5000;
/**
* @description min-height of the picker
* @default 48 (in pixel)
*/
this.minHeight = 48;
}
// Dragover listener
onDragOver(evt) {
evt.preventDefault();
evt.stopPropagation();
this.dragover = true;
}
// Dragleave listener
onDragLeave(evt) {
evt.preventDefault();
evt.stopPropagation();
this.dragover = false;
}
// Drop listener
ondrop(evt) {
evt.preventDefault();
evt.stopPropagation();
if (evt.dataTransfer.files && evt.dataTransfer.files[0]) {
this.addFile(evt.dataTransfer.files[0]);
}
this.dragover = false;
}
// Choose listener
inputChange(event) {
return __awaiter(this, void 0, void 0, function* () {
if (event.target.files && event.target.files[0]) {
this.addFile(event.target.files[0]);
}
});
}
addFile(file) {
return __awaiter(this, void 0, void 0, function* () {
if (!file) {
return;
}
if (this.formCtrl.disabled) {
return;
}
const errors = this.validate(file);
const fileName = file.name;
const base64Image = yield this._uploaderService.getBase64(file);
this.fileInputChangeStore = {
hasFile: true,
fileName,
errors,
base64Image
};
this.fileInputChange.emit(this.fileInputChangeStore);
this.formCtrl.setValue(base64Image);
});
}
validate(file) {
let isSizeValid = true;
if ((file.size / 1000) > this.maxSize) {
isSizeValid = false;
}
let isTypeValid = false;
for (const type of this.accept) {
if (type.split('.')[1] === file.type.split('/')[1]) {
isTypeValid = true;
}
}
return this.getError(isSizeValid, isTypeValid);
}
getError(size, type) {
let errors;
if (size && type) {
errors = {
maxSizeExceeded: null,
wrongFileType: null
};
}
else if (!size && type) {
errors = {
maxSizeExceeded: true,
wrongFileType: null
};
}
else if (size && !type) {
errors = {
maxSizeExceeded: null,
wrongFileType: true
};
}
else {
errors = {
wrongFileType: true,
maxSizeExceeded: true
};
}
return errors;
}
getImageHeightWidth(base64Image) {
return new Promise((resolve) => __awaiter(this, void 0, void 0, function* () {
const image = new Image();
image.src = base64Image;
image.onload = () => {
return resolve({
height: image.height,
width: image.width
});
};
}));
}
removeFile() {
this.fileInputChangeStore = {
hasFile: false,
fileName: null,
errors: null,
base64Image: null
};
this.fileInputChange.emit(this.fileInputChangeStore);
this.formCtrl.setValue('');
}
}
BaseUploaderComponent.decorators = [
{ type: Component, args: [{ template: '' },] }
];
BaseUploaderComponent.ctorParameters = () => [
{ type: UploaderService }
];
BaseUploaderComponent.propDecorators = {
fileInputChange: [{ type: Output }],
pickerLabel: [{ type: Input }],
hint: [{ type: Input }],
accept: [{ type: Input }],
maxSize: [{ type: Input }],
disabled: [{ type: Input }],
minHeight: [{ type: Input }],
onDragOver: [{ type: HostListener, args: ['dragover', ['$event'],] }],
onDragLeave: [{ type: HostListener, args: ['dragleave', ['$event'],] }],
ondrop: [{ type: HostListener, args: ['drop', ['$event'],] }]
};
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{ Input, Output, EventEmitter, Component, HostListener } from '@angular/core';\nimport { FormControl } from '@angular/forms';\nimport { UploaderService } from '../../services/uploader.service';\nimport { FileInputChange, UploaderError } from '../types/file-change.interface';\n\n\n\n@Component({ template: '' })\nexport class BaseUploaderComponent {\n\n  fileInputChangeStore: FileInputChange;\n  @Output() fileInputChange = new EventEmitter<FileInputChange>();\n\n  formCtrl: FormControl = new FormControl();\n\n  /**\n   * @description Picker label\n   * @default 'Drag image, or Choose' for image uploader\n   * @default 'Drag file, or Choose' for file uploader\n   * @example 'Drag your funny video, or Choose'\n   */\n  @Input() pickerLabel: string;\n\n  /**\n   * @description Hint is used to guide user\n   * @example 'Max file size: 5mb'\n   */\n  @Input() hint: string;\n\n  /**\n   * @description acceptable file types\n   * @default ['.jpg', '.png', '.jpeg'] for image uploader\n   * @default ['.pdf', '.csv', '.doc', '.docx','.docx', '.xlsx', '.cer'] for file uploader\n   * @example ['.gif'] for only gif files\n   */\n  @Input() accept: string[];\n\n  /**\n   * @description maximum file size in kb (kilobyte)\n   * @default 5000 (5mb)\n   */\n  @Input() maxSize = 5000;\n\n  /**\n   * @description disables the picker\n   */\n  @Input() disabled: boolean;\n\n  /**\n   * @description min-height of the picker\n   * @default 48 (in pixel)\n   */\n  @Input() minHeight = 48;\n\n  dragover: boolean;\n\n  constructor(\n    private _uploaderService: UploaderService\n  ) { }\n\n  // Dragover listener\n  @HostListener('dragover', ['$event'])\n  private onDragOver(evt): void {\n    evt.preventDefault();\n    evt.stopPropagation();\n    this.dragover = true;\n  }\n\n  // Dragleave listener\n  @HostListener('dragleave', ['$event'])\n  private onDragLeave(evt): void {\n    evt.preventDefault();\n    evt.stopPropagation();\n    this.dragover = false;\n  }\n\n  // Drop listener\n  @HostListener('drop', ['$event'])\n  private ondrop(evt): void {\n    evt.preventDefault();\n    evt.stopPropagation();\n\n    if (evt.dataTransfer.files && evt.dataTransfer.files[0]) {\n      this.addFile(evt.dataTransfer.files[0]);\n    }\n    this.dragover = false;\n  }\n\n  // Choose listener\n  public async inputChange(event): Promise<void> {\n    if (event.target.files && event.target.files[0]) {\n      this.addFile(event.target.files[0]);\n    }\n  }\n\n  private async addFile(file: any): Promise<void> {\n\n    if (!file) { return; }\n    if (this.formCtrl.disabled) { return; }\n\n    const errors = this.validate(file);\n\n    const fileName = file.name as string;\n    const base64Image = await this._uploaderService.getBase64(file);\n\n    this.fileInputChangeStore = {\n      hasFile: true,\n      fileName,\n      errors,\n      base64Image\n    };\n\n    this.fileInputChange.emit(this.fileInputChangeStore);\n    this.formCtrl.setValue(base64Image);\n\n  }\n\n  private validate(file: any): UploaderError {\n\n    let isSizeValid = true;\n    if ((file.size / 1000) > this.maxSize) {\n      isSizeValid = false;\n    }\n\n    let isTypeValid = false;\n\n    for (const type of this.accept) {\n      if (type.split('.')[1] === file.type.split('/')[1]) {\n        isTypeValid = true;\n      }\n    }\n\n    return this.getError(isSizeValid, isTypeValid);\n  }\n\n  private getError(size: boolean, type: boolean): UploaderError {\n\n    let errors: UploaderError;\n\n    if (size && type) {\n      errors = {\n        maxSizeExceeded: null,\n        wrongFileType: null\n      };\n    }\n    else if (!size && type) {\n      errors = {\n        maxSizeExceeded: true,\n        wrongFileType: null\n      };\n    }\n    else if (size && !type) {\n      errors = {\n        maxSizeExceeded: null,\n        wrongFileType: true\n      };\n    }\n    else {\n      errors = {\n        wrongFileType: true,\n        maxSizeExceeded: true\n      };\n    }\n\n    return errors;\n  }\n\n  private getImageHeightWidth(base64Image: any): Promise<{ height: number, width: number }> {\n    return new Promise(async resolve => {\n      const image = new Image();\n      image.src = base64Image;\n      image.onload = () => {\n        return resolve({\n          height: image.height,\n          width: image.width\n        });\n      };\n    });\n  }\n\n  public removeFile(): void {\n    this.fileInputChangeStore = {\n      hasFile: false,\n      fileName: null,\n      errors: null,\n      base64Image: null\n    };\n    this.fileInputChange.emit(this.fileInputChangeStore);\n    this.formCtrl.setValue('');\n  }\n\n}\n"]}