preparing to add members to poll

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

frontend/src/Components/PermissionEditor.svelte

@@ -10,7 +10,7 @@
     let {
         addMember        = (entry)    => console.log(`no handler for addMember(${entry})`),
         dropMember       = (member)   => console.log(`no handler for dropMember(${member})`),
-        getCandidates    = text => {},
+        getCandidates    = defaultGetCandidates,
         members,
         updatePermission = (uid,perm) => console.log(`no handler for updatePermission(${uid}, ${perm})`)
     } = $props();
@@ -18,6 +18,21 @@
     let permissions   = $state(null);
     let sortedMembers = $derived.by(() => Object.values(members).sort((a, b) => a.user.name.localeCompare(b.user.name)));
 
+    async function defaultGetCandidates(text){
+        const url  = api('user/search');
+        const resp = await fetch(url,{
+            credentials : 'include',
+            method      : 'POST',
+            body        : text
+        });
+        if (resp.ok){
+            var json = await resp.json();
+            return Object.fromEntries(Object.values(json).map(user => [user.id,user.name]));
+        } else {
+            return [];
+        }
+    }
+
     async function loadPermissions(){
         const url  = api('task/permissions');
         const resp = await fetch(url,{credentials: 'include'});