implemented GUI update on cloning items

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/routes/stock/ItemList.svelte

@@ -1,11 +1,39 @@
 <script>
-    import { api, post }    from '../../urls.svelte';
+    import { onDestroy, onMount } from 'svelte';
+    import { api, eventStream, post }    from '../../urls.svelte';
     import { error, yikes } from '../../warn.svelte';
     import { t }            from '../../translations.svelte';
 
     let { items, selected = $bindable(null), location = null, drag_start = item => console.log({dragging:item}) } = $props();
+    let eventSource      = null;
     let newItem = $state({name:null, code: null});
 
+    function handleCreateEvent(evt){
+        let json = JSON.parse(evt.data);
+        if (json.item.location.id == location.id){
+            items = [...items,json.item];
+            selected = json.item;
+        }
+    }
+
+    function handleEvent(evt,method){
+        console.log(evt,method);
+    }
+
+	function handleDeleteEvent(evt){
+        handleEvent(evt,'delete');
+    }
+
+    function handleUpdateEvent(evt){
+        handleEvent(evt,'update');
+    }
+
+    function load(){
+        try {
+			eventSource = eventStream(handleCreateEvent,handleUpdateEvent,handleDeleteEvent);
+        } catch (ignored) {}
+    }
+
     async function saveNewItem(){
         newItem.location = location;
         const url = api('stock/item');
@@ -17,6 +45,12 @@
             items = [...items, it];
         } else error(res);
     }
+
+    onDestroy(() => {
+		if (eventSource) eventSource.close();
+	});
+    onMount(load);
+
 </script>
 <table>
     <thead>

frontend/src/routes/stock/ItemProps.svelte

@@ -69,7 +69,7 @@
 
 {#if item}
 <LineEditor type="h3" editable={true} value={item.name} onSet={v => update('name',v)} />
-<button class="clone symbol" title={t('clone')} onclick={doClone}>C</button>
+<button class="clone symbol" title={t('clone')} onclick={doClone}></button>
 <div>
     {@html item.description.rendered}
 </div>