bugfix: moving of tasks in tree now works as intended

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

frontend/src/routes/task/RequiredTasks.svelte

@@ -2,7 +2,7 @@
     import { onMount } from 'svelte';
     import { useTinyRouter } from 'svelte-tiny-router';
 
-    import { api } from '../../urls.svelte';
+    import { api, get, patch, post } from '../../urls.svelte';
     import { error, yikes }  from '../../warn.svelte';
     import { t }   from '../../translations.svelte';
 
@@ -17,7 +17,7 @@
 
     async function add(new_task_id){
         let url = api(`task/${new_task_id}`);
-        let resp = await fetch(url,{ credentials : 'include' });
+        let resp = await get(url);
         if (resp.ok){
             yikes();
             let newTask = await resp.json();
@@ -27,7 +27,7 @@
             }
             task.required_tasks_ids.push(new_task_id);
             requiredTasks[new_task_id] = newTask;
-            await patch();
+            await update();
             delete candidates[new_task_id];
         } else {
             error(resp);
@@ -59,17 +59,11 @@
     async function loadTasks(){
         if (!task || !task.required_tasks_ids || !task.required_tasks_ids.length) return;
         const url = api('task/list');
-        const res = await fetch(url,{
-            credentials : 'include',
-            method      : 'POST',
-            body        : JSON.stringify({ids:task.required_tasks_ids})
-        });
+        const res = await post(url,{ids:task.required_tasks_ids});
         if (res.ok){
             yikes();
             requiredTasks = await res.json();
-        } else {
-            error(resp);
-        }
+        } else error(resp);
     }
 
     function oninput(){
@@ -84,19 +78,15 @@
         return false;
     }
 
-    async function patch(){
+    async function update(){
             const url  = api(`task/${task.id}`);
-            const resp = await fetch(url,{
-                credentials : 'include',
-                method      : 'PATCH',
-                body        : JSON.stringify({required_tasks_ids:task.required_tasks_ids})
-            });
+            const resp = await patch(url,{required_tasks_ids:task.required_tasks_ids});
             if (!resp.ok) error(resp);
     }
 
     async function unlink(required_task){
         task.required_tasks_ids = task.required_tasks_ids.filter(item => item != required_task.id);
-        patch();
+        update();
         delete requiredTasks[required_task.id];
     }