[Angularfire] Angular File uploads to Firebase Storage with Angular control value accessor

Source: Internet
Author: User

Tags: contain att tps storage core col Write you rmi

The upload class is used in the service layer. Notice it has a constructor file for attribute, and which has a type of File . This would allows us to initialize new uploads with a JavaScript File object. You'll see what's important in the next step.

Export class Upload {  $key: string;  File:file;  name:string;  url:string;  Progress:number;   New Date ();  Constructor (file:file) {    this. File = file;  }} 

Then build the upload service, which can inject to component:

Import {injectable} from ' @angular/core '; import {Subject} from' Rxjs/subject '; import {Matsnackbar} from' @angular/material '; Import* As Firebase from ' Firebase '; import Uploadtasksnapshot=firebase.storage.uploadtasksnapshot;import {Upload} from'./upload '; @Injectable () Export class Uploadservice {uploading$=NewSubject<number>(); completed$=NewSubject<upload>(); Constructor (private Snackbar:matsnackbar) {} uploadfile (Upload:upload, folder:string) {//Create a storage refConst STORAGEREF =firebase.storage (). ref (); Const Uploadtask= Storageref.child (' ${folder}/${upload.file.name} '). put (Upload.file);//Upload FileUploadtask.on (Firebase.storage.TaskEvent.STATE_CHANGED, (snapshot:uploadtasksnapshot)={upload.progress= (snapshot.bytestransferred/snapshot.totalbytes) * 100;  This. Uploading$.next (upload.progress); }, (Err)= {         This. Snackbar.open (Err.message, ' OK ', {duration:3000,        }); },      () ={Upload.url=UploadTask.snapshot.downloadURL; Upload.name=Upload.file.name;  This. Completed$.next (upload);  This. Uploading$.next (NULL);  }); } deleteupload (Name:string, folder:string) {const STORAGEREF=firebase.storage (). ref (); Storageref.child (' ${folder}/${name} '). Delete (); This. Completed$.next (); }}

Component:

Import {changedetectionstrategy, Component, ForwardRef, Input} from ' @angular/core '; import {controlvalueaccessor, ng_value_accessor} from' @angular/forms '; import {Uploadservice} from‘.. /.. /services/upload.service '; import {Upload} from‘.. /.. /services/upload '; import {Observable} from' Rxjs/observable '; export const Type_control_accessor={provide:ng_value_accessor, Multi:true, Useexisting:forwardref (()=imageuploadercomponent)}; @Component ({selector:' Image-uploader ', ChangeDetection:ChangeDetectionStrategy.OnPush, providers: [Type_control_accessor], Templateurl:'./image-uploader.component.html ', Styleurls: ['./image-uploader.component.scss ']}) Export class Imageuploadercomponent implements Controlvalueaccessor {@Input () img;  Private ontouch:function;  Private onmodelchange:function;  Private value:string;  File:upload;  Currentupload:upload; progress$: Observable<number>; Constructor (private Uploadservice:uploadservice) { This. progress$ = This. uploadservice.uploading$;  This. Uploadservice.completed$.subscribe ((upload) = {      if(upload) { This. setselected (Upload.url);  This. Currentupload =upload; } Else {         This. setselected (");  This. Currentupload =NULL;  }    }); } onChange ($event) {Const file= $event. target.files[0];  This. File =NewUpload (file);  This. Uploadservice.uploadfile ( This. File, ' icons '); } writevalue (Value:any):void {     This. Value =value; } registeronchange (fn:function):void {     This. Onmodelchange =fn; } registerontouched (fn:function):void {     This. OnTouch =fn; } setselected (value:string):void {     This. Value =value;  This. Onmodelchange (value);  This. OnTouch (); } clear () {if( This. File) {       This. Uploadservice.deleteupload ( This. File.name, ' icons ');  This. setselected ("); }  }}

Template:

    <Div*ngif= "progress$ | async as P">      <Mat-progress-barMode= "Determinate"[value]= "P"></Mat-progress-bar>    </Div>    <Mat-card-subtitle>select/upload icon</Mat-card-subtitle>    <mat-card-contentFxlayout= "column">      <DivFxlayout= "Row"fxlayoutalign= "Space-around">        <Div*ngif= "Currentupload"class= "Image-container"Fxflex= "30%">          <img[SRC]= "Currentupload?". URL | | ' ' "[Alt]= "Currentupload?". name | | ' ' ">        </Div>      </Div>

[Angularfire] Angular File uploads to Firebase Storage with Angular control value accessor

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