ogcp: show cache contents in client details

Show cache contents in client details for a more complete view
of the client's state.
Move the cache inspector code to its own template for reusability.

1 files changed, 152 insertions, 0 deletions

diff --git a/ogcp/templates/cache_inspector.html b/ogcp/templates/cache_inspector.html
new file mode 100644
index 0000000..42dd983
--- /dev/null
+++ b/ogcp/templates/cache_inspector.html
@@ -0,0 +1,152 @@
+{% if storage_data is defined and images_data is defined and client_images is defined and ip_list is defined %}
+
+<br>
+{% if images_data|length > 0 %}
+<div class="card text-center">
+    <div class="card-header">
+      {{ _('Detailed cache usage') }}
+    </div>
+    <div class="card-body">
+        {% if ip_list|length > 1 %}
+          <label for="cacheSelect">Choose a client:</label>
+          <select id="cacheSelect" onchange="onClientSelected()">
+          {% for client_ip in ip_list %}
+              <option value="{{ client_ip }}">{{ client_ip }}</option>
+          {% endfor %}
+          </select>
+        {% endif %}
+
+        <ul class="list-group list-group-horizontal">
+            <li class="list-group-item w-50">
+                <canvas id="cacheChart" class="mb-2"></canvas>
+            </li>
+            <li class="list-group-item w-50">
+              <p>{{ _('Images in cache:') }}</p>
+              <div id="cacheList"></div>
+            </li>
+        </ul>
+        <ul class="list-group list-group-horizontal">
+            <li class="list-group-item w-50">
+                {{ _('Disk size') }}
+            </li>
+            <li class="list-group-item w-50">
+                {{ _('used') }} (%)
+            </li>
+            <li class="list-group-item w-50">
+                {{ _('available') }} (%)
+            </li>
+        </ul>
+        <ul class="list-group list-group-horizontal">
+            <li id="totalCacheItem" class="list-group-item w-50"></li>
+            <li id="usedCacheItem" class="list-group-item w-50"></li>
+            <li id="freeCacheItem" class="list-group-item w-50"></li>
+        </ul>
+    </div>
+</div>
+
+<!-- jQuery -->
+<script src="{{ url_for('static', filename='AdminLTE/plugins/jquery/jquery.min.js') }}"></script>
+<!-- ChartJS -->
+<script src="{{ url_for('static', filename='AdminLTE/plugins/chart.js/Chart.min.js') }}"></script>
+<script>
+    var cacheChartConfig = {
+      type: 'doughnut',
+      data: {
+        labels: ['Used', 'Available'],
+        datasets: [
+          {
+            label: 'Disk usage',
+            data: [
+              0,
+              1,
+            ],
+            backgroundColor: [
+              'rgb(255, 99, 132)',
+              'rgb(54, 162, 235)',
+            ],
+          },
+        ],
+      },
+      options: {
+        responsive: true,
+        plugins: {
+          legend: {
+            position: 'top',
+          },
+          title: {
+            display: true,
+            text: 'Chart.js Doughnut Chart'
+          },
+        },
+      },
+    };
+    var cacheChart = new Chart(
+      document.getElementById('cacheChart'),
+      cacheChartConfig,
+    );
+
+    var storageData = {{ storage_data|tojson|safe }};
+    var imageData = {{ images_data|tojson|safe }};
+    var clientImages = {{ client_images|tojson|safe }};
+
+    function onClientSelected() {
+      var selectElement = document.getElementById("cacheSelect");
+      var selectedOption = selectElement.options[selectElement.selectedIndex].text;
+      updateChart(selectedOption);
+    }
+
+    function toGiB(v, decimals) {
+      return (v / Math.pow(2, 30)).toFixed(decimals);
+    }
+
+    function updateChart(ip) {
+        var totalCache = toGiB(storageData[ip].total, 3);
+        var usedCache = toGiB(storageData[ip].used, 3);
+        var freeCache = toGiB(storageData[ip].total - storageData[ip].used, 3)
+
+        cacheChart.data.datasets[0].data = [
+          usedCache,
+          freeCache,
+        ]
+        cacheChart.update();
+
+        var totalCacheItem = document.getElementById("totalCacheItem");
+        totalCacheItem.innerHTML = totalCache + " GiB";
+
+        var usedCacheItem = document.getElementById("usedCacheItem");
+        usedCacheItem.innerHTML = usedCache + " GiB (" + Math.round((usedCache / totalCache) * 100) + "%)";
+
+        var freeCacheItem = document.getElementById("freeCacheItem");
+        freeCacheItem.innerHTML = freeCache + " GiB (" + Math.round((freeCache / totalCache) * 100) + "%)";
+
+        var cacheList = document.getElementById("cacheList");
+        cacheList.innerHTML = "";
+        if (clientImages[ip]) {
+            clientImages[ip].forEach(function(img) {
+            cacheList.innerHTML += imageData[img]["name"] + " (" + (imageData[img]["size"] / Math.pow(2, 20)).toFixed(3) + " MiB)<br>";
+            });
+        }
+    }
+
+    updateChart("{{ ip_list[0] }}");
+
+    // Update pill data
+    $('.badge-pill').each(function(index) {
+      for (var ip in storageData) {
+        if ($(this).html().includes(ip)) {
+          var totalCache = storageData[ip].total;
+          var usedCache = storageData[ip].used;
+          var freeCache = toGiB(totalCache - usedCache, 1)
+          $(this).html($(this).html() + '<br>free: ' + freeCache + ' GiB');
+          break;
+        }
+      }
+    });
+</script>
+{% else %}
+<div class="card text-center p-3">
+    <b>{{ _('No cache contents') }}</b>
+</div>
+{% endif %}
+
+{% endif %}
\ No newline at end of file