Fix refresh token mecanism.

frontend/src/app/pages/publication-edition/picture-selection-dialog/picture-selection-dialog.component.ts

@@ -53,7 +53,18 @@ export class PictureSelectionDialog implements OnInit {
         this.dialogRef.close();
     }
 
-    uploadPicture(file: any): void {
-        console.log("uploadFile", file);
+    uploadPicture(fileSelectionEvent: any): void {
+        const pictureFile = fileSelectionEvent.target.files[0];
+        if (pictureFile) {
+            this.pictureRestService.uploadPicture(pictureFile)
+                .then(pictureId => {
+                    this.dialogRef.close(pictureId);
+                })
+                .catch(error => {
+                    const errorMessage = 'A technical error occured while uploading your picture.';
+                    console.error(errorMessage, error);
+                    this.snackBar.open(errorMessage, 'Close', { duration: 5000 });
+                });
+        }
     }
 }