less url-building in frontend for sortable tables

templates/table/colonnade.hamlet

@@ -1,4 +1,4 @@
-<table>
+<table id="#{dbtIdent}">
   $maybe sortableP <- pSortable
     $with toSortable <- toSortable sortableP
       <thead>

templates/table/colonnade.julius

@@ -6,32 +6,27 @@
     var ASC = 'asc';
     var DESC = 'desc';
 
+    // TODO: Make use of interpolated dbtIdent
     var table = document.querySelector('table');
     var ths = Array.from(table.querySelectorAll('th'));
 
     // attach click handler to each table-header
     ths.map(function(th) {
-      th.addEventListener('click', clickHandler);
+      var link = th.querySelector('a');
+      if (link) {
+        link.addEventListener('click', clickHandler);
+      }
     });
 
     // handles click on table header
     function clickHandler(event) {
       event.preventDefault();
-      // should instead be smthg like: JSON.parse(this.dataset.sortparams);
-      // hardcoded for now
-      var sortParams = {sorting: 'name', prefix: 'terms'};
-      if (sortParams.order) {
-        sortParams.order = sortParams.order === ASC ? DESC : ASC;
-      } else {
-        sortParams.order = ASC;
-      }
-      var params = makeParams(sortParams.prefix, sortParams);
-      var url = new URL(window.location);
-      for (var p in params) {
-        url.searchParams.set(p, params[p]);
-      }
-      fetchTableFrom(url);
-      markSorted(this, sortParams.order);
+      var url = new URL(window.location.origin + window.location.pathname + this.getAttribute('href'));
+      var order = this.parentNode.dataset.order || ASC;
+      // TODO: not working here... getting whole page as response...
+      url.searchParams.set('table-only', 'true');
+      updateTableFrom(url);
+      markSorted(this.parentNode, order);
     }
 
     function markSorted(th, order) {
@@ -39,40 +34,28 @@
         th.classList.remove('sorted-asc', 'sorted-desc');
       });
       th.classList.add('sorted-' + order);
+      th.dataset.order = order;
     }
 
     // fetches new sorted table from url with params and replaces contents of current table
-    function fetchTableFrom(url) {
+    function updateTableFrom(url) {
       fetch(url, {
-        credentials: 'same-origin'
+        headers: {
+          'Accept': 'text/html'
+        }
       }).then(function(response) {
+        var contentType = response.headers.get("content-type");
         if (!response.ok) {
            throw ('Looks like there was a problem fetching ' + url.toString() + '. Status Code: ' + response.status);
          }
-         // Examine the text in the response
-         response.text().then(function(data) {
-           // replace contents of table body
-           table.querySelector('tbody').innerHTML = data;
-         });
+         return response.text();
+       }).then(function(data) {
+         // replace contents of table body
+         table.querySelector('tbody').innerHTML = data;
       }).catch(function(err) {
         console.error(err);
       });
     }
 
-    // returns default sort-params for with specific prefix
-    function makeParams(prefix, custom) {
-      var defaultParams = Object.assign({
-        pagesize: 20,
-        page: 0,
-        order: ASC
-      }, custom);
-      var res = {};
-      for (var p in defaultParams) {
-        res[prefix + '-' + p] = defaultParams[p];
-      }
-      res['table-only'] = 'true';
-      return res;
-    }
-
   });
 })();