feature: show a warning message whenever a heatmap is shown that masks sources

flexmeasures/ui/static/css/flexmeasures.css

@@ -189,7 +189,7 @@ p.error {
     font-weight: 700;
 }
 
-#tzwarn {
+#tzwarn,#sourcewarn {
     margin-top: 20px;
     margin-bottom: 20px;
     color: var(--secondary-color);

flexmeasures/ui/static/js/data-utils.js

@@ -0,0 +1,63 @@
+// Data source utils
+
+/**
+ * Extracts unique values of a specified nested property from an array of JSON objects.
+ *
+ * @param {Array} data - An array of JSON objects from which to extract unique values.
+ * @param {string} key - The dot-separated key representing the nested property (e.g., 'source.id').
+ * @returns {Array} An array containing the unique values of the specified nested property.
+ *
+ * @example
+ * const data = [
+ *   {"id": 1, "name": "foo", "source": {"id": 4, "name": "bar"}},
+ *   {"id": 2, "name": "baz", "source": {"id": 4, "name": "qux"}},
+ *   {"id": 3, "name": "quux", "source": {"id": 5, "name": "corge"}}
+ * ];
+ *
+ * const key = 'source.id';
+ * const uniqueSourceIds = getUniqueValues(data, key);
+ * console.log(uniqueSourceIds); // Output: [4, 5]
+ */
+export function getUniqueValues(data, key) {
+    var lookup = {};
+    var items = data;
+    var results = [];
+
+    for (var item, i = 0; item = items[i++];) {
+        var val = getValueByNestedKey(item, key);
+
+        if (!(val in lookup)) {
+            lookup[val] = 1;
+            results.push(val);
+        }
+    }
+    return results;
+}
+
+/**
+ * Retrieves the value of a nested property in an object using a dot-separated key.
+ *
+ * @param {Object} obj - The input JavaScript object from which to retrieve the nested value.
+ * @param {string} key - The dot-separated key representing the nested property (e.g., 'source.id').
+ * @returns {*} The value of the nested property if found, otherwise, returns undefined.
+ *
+ * @example
+ * const jsonString = '{"id":11,"name":"ajax","subject":"OR","mark":63,"source":{"id":4,"name":"foo"}}';
+ * const jsonObject = JSON.parse(jsonString);
+ *
+ * const key = 'source.id';
+ * const sourceId = getValueByNestedKey(jsonObject, key);
+ * console.log(sourceId); // Output: 4
+ */
+function getValueByNestedKey(obj, key) {
+    const keys = key.split('.');
+    let value = obj;
+    for (const k of keys) {
+        if (value[k] === undefined) {
+            return undefined; // Property not found
+        }
+        value = value[k];
+    }
+    return value;
+}
+

flexmeasures/ui/templates/base.html

@@ -233,6 +233,7 @@
     <!-- Render Charts -->
     <script type="module" type="text/javascript">
 
+    import { getUniqueValues } from "{{ url_for('flexmeasures_ui.static', filename='js/data-utils.js') }}";
     import { subtract, thisMonth, lastNMonths, getOffsetBetweenTimezonesForDate } from "{{ url_for('flexmeasures_ui.static', filename='js/daterange-utils.js') }}";
     import { partition, updateBeliefs, beliefTimedelta, setAbortableTimeout} from "{{ url_for('flexmeasures_ui.static', filename='js/replay-utils.js') }}";
 
@@ -280,13 +281,25 @@
         }
     });
 
+    function checkSourceMasking(data) {
+        var uniqueSourceIds = getUniqueValues(data, 'source.id');
+        if (chartType == 'daily_heatmap' && uniqueSourceIds.length > 1) {
+            document.getElementById('sourcewarn').style.display = 'block';
+            document.getElementById('sourcewarn').innerHTML = 'Please note that only data from the most prevalent source is shown.';
+        }
+        else {
+            document.getElementById('sourcewarn').style.display = 'none';
+        }
+    }
+
     async function embedAndLoad(chartSpecsPath, elementId, datasetName, previousResult, startDate, endDate) {
 
         await vegaEmbed('#'+elementId, chartSpecsPath + 'dataset_name=' + datasetName + '&width=container&include_sensor_annotations=false&include_asset_annotations=false&chart_type=' + chartType, {{ chart_options | safe }})
         .then(function (result) {
             // result.view is the Vega View, chartSpecsPath is the original Vega-Lite specification
             vegaView = result.view;
             if (previousResult) {
+                checkSourceMasking(previousResult);
                 var slicedPreviousResult = previousResult.filter(item => {
                     return item.event_start >= startDate.getTime() && item.event_start < endDate.getTime();
                 })
@@ -397,6 +410,7 @@
             $("#spinner").hide();
             vegaView.change(datasetName, vega.changeset().remove(vega.truthy).insert(result[0])).resize().run();
             previousResult = result[0];
+            checkSourceMasking(previousResult);
             /**
             vegaView.change(datasetName + '_annotations', vega.changeset().remove(vega.truthy).insert(result[1])).resize().run();
             */
@@ -418,6 +432,7 @@
                 $("#spinner").hide();
                 vegaView.change(datasetName, vega.changeset().remove(vega.truthy).insert(fetchedInitialData)).resize().run();
                 previousResult = fetchedInitialData;
+                checkSourceMasking(previousResult);
                 var timerangeNotSetYet = false
             {% else %}
                 var timerangeNotSetYet = true

flexmeasures/ui/templates/views/sensors.html

@@ -7,7 +7,10 @@
 {% block divs %}
 
       <div class="sensor-data charts text-center">
-          <div class="row"><div class="alert alert-info" id="tzwarn" style="display:none;"></div></div>
+          <div class="row">
+              <div class="alert alert-info" id="tzwarn" style="display:none;"></div>
+              <div class="alert alert-info" id="sourcewarn" style="display:none;"></div>
+          </div>
           <div class="row on-top-md">
               <div class="col-sm-2">
                   <div class="sidepanel-container">