implemented cloning of stock items. NEXT: update of GUI via message bus

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

frontend/src/routes/stock/ItemProps.svelte

@@ -1,7 +1,7 @@
 <script>
     import LineEditor       from '../../Components/LineEditor.svelte';
     import { onMount }      from 'svelte';
-    import { api }          from '../../urls.svelte';
+    import { api, patch, post } from '../../urls.svelte';
     import { error, yikes } from '../../warn.svelte';
     import { t }            from '../../translations.svelte';
 
@@ -15,6 +15,15 @@
         }
     });
 
+    async function doClone(ev){
+        let url = api('stock/clone');
+        let res = await post(url,{id:item.id});
+        if (res.ok){
+            let json = await res.json();
+            yikes(res);
+        } else error(res);
+    }
+
     function byName(a,b){
         return a.name.localeCompare(b.name);
     }
@@ -30,11 +39,7 @@
             },
             add_prop : add_prop
         }
-        const res = await fetch(url,{
-            credentials:'include',
-            method:'POST',
-            body:JSON.stringify(data)
-        });
+        const res = await post(url,data);
         if (res.ok){
             const prop = await res.json();
             const id = prop.id;
@@ -45,18 +50,14 @@
         return false;
     }
 
-    async function patch(key,newVal){
+    async function update(key,newVal){
         const url = api('stock');
         const data = {
             id    : item.id,
             owner : item.owner,
         };
         data[key] = newVal;
-        const res = await fetch(url,{
-            credentials:'include',
-            method:'PATCH',
-            body:JSON.stringify(data)
-        });
+        const res = await patch(url,data);
         if (res.ok){
             yikes();
             return true;
@@ -67,13 +68,19 @@
 </script>
 
 {#if item}
-<LineEditor type="h3" editable={true} value={item.name} onSet={v => patch('name',v)} />
-Code: <LineEditor type="span" editable={true} value={item.code} onSet={v => patch('code',v)} />
+<LineEditor type="h3" editable={true} value={item.name} onSet={v => update('name',v)} />
+<button class="clone symbol" title={t('clone')} onclick={doClone}>C</button>
 <div>
     {@html item.description.rendered}
 </div>
 <table>
     <tbody>
+        <tr>
+            <td>{t('Code')}:</td>
+            <td>
+                <LineEditor type="span" editable={true} value={item.code} onSet={v => update('code',v)} />
+            </td>
+        </tr>
         {#each item.properties.toSorted(byName) as prop}
         <tr>
             <td>