make report sortable; include a csv download

Makefile

@@ -37,4 +37,4 @@ rebuild: clean build
 
 cleanhurltest:
 	-sudo chown -R $(USER):$(USER) data
-	-rm data/gradingreport.sqlite
+	-rm data/facultyactivity.sqlite

pages/dashboard.go

@@ -45,16 +45,20 @@ var dashboardTmpl = template.Must(template.New("dashboard").Parse(`<!DOCTYPE htm
         <div class="rvt-m-bottom-lg">
             <button class="rvt-button rvt-button--secondary" type="button" id="download-csv">Download CSV Report</button>
         </div>
+        <div class="rvt-m-bottom-md">
+            <label class="rvt-label" for="table-search">Search</label>
+            <input class="rvt-input" type="search" id="table-search" placeholder="Filter results...">
+        </div>
         <div style="overflow-x:auto;">
         <table class="rvt-table rvt-table--cells" id="report-table">
             <thead>
                 <tr>
-                    <th scope="col">Date Submitted</th>
-                    <th scope="col">Name</th>
+                    <th scope="col" data-col="0" style="cursor:pointer;white-space:nowrap;">Date Submitted <span class="sort-ind">&#8597;</span></th>
+                    <th scope="col" data-col="1" style="cursor:pointer;white-space:nowrap;">Name <span class="sort-ind">&#8597;</span></th>
                     <th scope="col">Title</th>
                     <th scope="col">Description</th>
                     <th scope="col">Hyperlink</th>
-                    <th scope="col">Type</th>
+                    <th scope="col" data-col="5" style="cursor:pointer;white-space:nowrap;">Type <span class="sort-ind">&#8597;</span></th>
                 </tr>
             </thead>
             <tbody>
@@ -76,52 +80,96 @@ var dashboardTmpl = template.Must(template.New("dashboard").Parse(`<!DOCTYPE htm
         {{end}}
     </main>
     <script>
-    var dlBtn = document.getElementById('download-csv');
-    if (dlBtn) {
-        dlBtn.addEventListener('click', function() {
-            var now = new Date();
-            var p = function(n) { return n < 10 ? '0' + n : '' + n; };
-            var stamp = '' + now.getFullYear() + p(now.getMonth()+1) + p(now.getDate()) + p(now.getHours()) + p(now.getMinutes()) + p(now.getSeconds());
-            var filename = 'Faculty_Activity_Report-' + stamp + '.csv';
+    (function() {
+        var table = document.getElementById('report-table');
+        var allRows = table ? Array.prototype.slice.call(table.querySelectorAll('tbody tr')) : [];
+        var sortState = {col: -1, dir: 1};
 
-            function esc(val) {
-                val = val || '';
-                if (val.indexOf('|') !== -1 || val.indexOf('"') !== -1 || val.indexOf('\n') !== -1) {
-                    return '"' + val.replace(/"/g, '""') + '"';
-                }
-                return val;
+        function getCellText(row, col) {
+            var cells = row.querySelectorAll('td');
+            return cells[col] ? cells[col].textContent.trim() : '';
+        }
+
+        function apply() {
+            var term = (document.getElementById('table-search').value || '').toLowerCase();
+            var rows = allRows.filter(function(row) {
+                if (!term) return true;
+                return Array.prototype.some.call(row.querySelectorAll('td'), function(cell) {
+                    return cell.textContent.toLowerCase().indexOf(term) !== -1;
+                });
+            });
+            if (sortState.col >= 0) {
+                rows.sort(function(a, b) {
+                    var av = getCellText(a, sortState.col).toLowerCase();
+                    var bv = getCellText(b, sortState.col).toLowerCase();
+                    return av < bv ? -sortState.dir : av > bv ? sortState.dir : 0;
+                });
             }
+            var tbody = table.querySelector('tbody');
+            while (tbody.firstChild) tbody.removeChild(tbody.firstChild);
+            rows.forEach(function(r) { tbody.appendChild(r); });
+        }
 
-            var lines = ['sep=|'];
-            lines.push(['Date Submitted', 'Name', 'Title', 'Description', 'Hyperlink', 'Type'].map(esc).join('|'));
+        var searchInput = document.getElementById('table-search');
+        if (searchInput) searchInput.addEventListener('input', apply);
 
-            var rows = document.querySelectorAll('#report-table tbody tr');
-            rows.forEach(function(row) {
-                var cells = row.querySelectorAll('td');
-                var fields = [];
-                cells.forEach(function(cell, i) {
-                    if (i === 4) {
-                        var a = cell.querySelector('a');
-                        fields.push(esc(a ? a.href : ''));
-                    } else {
-                        fields.push(esc(cell.textContent.trim()));
-                    }
+        if (table) {
+            Array.prototype.forEach.call(table.querySelectorAll('th[data-col]'), function(th) {
+                th.addEventListener('click', function() {
+                    var col = parseInt(th.getAttribute('data-col'), 10);
+                    sortState.dir = sortState.col === col ? sortState.dir * -1 : 1;
+                    sortState.col = col;
+                    Array.prototype.forEach.call(table.querySelectorAll('.sort-ind'), function(ind) { ind.textContent = '⇕'; });
+                    th.querySelector('.sort-ind').textContent = sortState.dir === 1 ? '↑' : '↓';
+                    apply();
                 });
-                lines.push(fields.join('|'));
             });
+        }
 
-            var csv = lines.join('\r\n');
-            var blob = new Blob([csv], {type: 'text/csv;charset=utf-8;'});
-            var url = URL.createObjectURL(blob);
-            var a = document.createElement('a');
-            a.href = url;
-            a.download = filename;
-            document.body.appendChild(a);
-            a.click();
-            document.body.removeChild(a);
-            URL.revokeObjectURL(url);
-        });
-    }
+        var dlBtn = document.getElementById('download-csv');
+        if (dlBtn) {
+            dlBtn.addEventListener('click', function() {
+                var now = new Date();
+                var p = function(n) { return n < 10 ? '0' + n : '' + n; };
+                var stamp = '' + now.getFullYear() + p(now.getMonth()+1) + p(now.getDate()) + p(now.getHours()) + p(now.getMinutes()) + p(now.getSeconds());
+
+                function esc(val) {
+                    val = val || '';
+                    if (val.indexOf('|') !== -1 || val.indexOf('"') !== -1 || val.indexOf('\n') !== -1) {
+                        return '"' + val.replace(/"/g, '""') + '"';
+                    }
+                    return val;
+                }
+
+                var lines = ['sep=|'];
+                lines.push(['Date Submitted', 'Name', 'Title', 'Description', 'Hyperlink', 'Type'].map(esc).join('|'));
+                Array.prototype.forEach.call(table.querySelectorAll('tbody tr'), function(row) {
+                    var cells = row.querySelectorAll('td');
+                    var fields = [];
+                    Array.prototype.forEach.call(cells, function(cell, i) {
+                        if (i === 4) {
+                            var a = cell.querySelector('a');
+                            fields.push(esc(a ? a.href : ''));
+                        } else {
+                            fields.push(esc(cell.textContent.trim()));
+                        }
+                    });
+                    lines.push(fields.join('|'));
+                });
+
+                var csv = lines.join('\r\n');
+                var blob = new Blob([csv], {type: 'text/csv;charset=utf-8;'});
+                var url = URL.createObjectURL(blob);
+                var a = document.createElement('a');
+                a.href = url;
+                a.download = 'Faculty_Activity_Report-' + stamp + '.csv';
+                document.body.appendChild(a);
+                a.click();
+                document.body.removeChild(a);
+                URL.revokeObjectURL(url);
+            });
+        }
+    })();
     </script>
 </body>
 </html>`))