update bpo services

WebGde/WebContent/src/BPO/getElement.js

@@ -18,7 +18,7 @@ async function initGetElement() {
                     let dir = await lst.data;
                     dir = [...dir];
                     Dirfiles =  dir.slice(dir.indexOf(lastImage) + 1);
-                    sessionStorage.setItem("dir_files", JSON.stringify(dir));
+                    sessionStorage.setItem("dir_files", JSON.stringify(Dirfiles));
                         
                     sessionStorage.setItem("element_id", retElement.element.elementId);
                     sessionStorage.setItem("element_file_loc", retElement.element.fileLocation);

WebGde/WebContent/src/BPO/returnElement.js

 async function returnElementBPO(elementId) {
     let response = await fetch(getUrlReturnElement(elementId), {method: "POST"});
 
-    if (response.status == 200) {
-        alert("Element Returned");       
-        await initGetElement();        
-        init();        
+    if (response.status == 200) {               
+        await loadWaitingElement();        
+        init();
+        alert("Element Returned");        
     }else{
         alert(`Error ${response.status}: Returning element`);
     }
@@ -23,4 +23,34 @@ window.addEventListener('keydown', function(e) {
         // const fieldForm = document.getElementById("fields");
         // fieldForm.querySelector('input[type="submit"]').click();
     }
-});
\ No newline at end of file
+});
+
+async function loadWaitingElement(){
+    while (true) {
+        const element = await getWaitingElement();
+
+        if (element.errorCode == 0) {
+            const lst = await isLSTExisting(element.element);
+
+            if (lst.isExisting) {
+                let  dir = await lst.data;
+                Dirfiles =  [...dir];
+                sessionStorage.setItem("dir_files", JSON.stringify(Dirfiles));
+
+                sessionStorage.setItem("element_id", element.element.elementId);
+                sessionStorage.setItem("element_file_loc", element.element.fileLocation);
+                break;
+            } else {
+                await returnElement(element.element);
+            }
+        } else if (element.errorCode == 463) {
+            alert("No more available element");
+            sessionStorage.clear();
+            localStorage.clear();
+            logoutKeycloak();
+            break;
+        } else {
+            alert(`Error ${element.errorCode}: Fetching waiting element`);
+        }
+    }
+}
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