Added another simlpe script template for line charts

templates/flexchartsTemplate2.js

@@ -0,0 +1,102 @@
+// flexchartsTemplate2.js
+
+/*
+   Create simple line chart based on adapter flexcharts using data of history adapter
+  
+   Preconditions:
+    * Adapter flexcharts (version 0.1.6 or newer) is running. Adaptewr is available via  beta repository of ioBroker.
+    * This script is running on instance 0 of javascript adapter, i.e. on javascript.0
+  
+   Uses Apache ECharts: https://echarts.apache.org/en/index.html
+
+   This is a temmplate. At least:
+   * check const instanceHistory
+   * edit const mySeries to use your own data
+   * edit const option to configure the chart
+   * adapt function getTsStart()
+
+   Use following http addresses in browser or iFrame:
+   http://localhost:8082/flexcharts/echarts.html?source=script&message=mylinechart
+
+   Adapt 'localhost' and '8082' according to your needs
+*/
+
+// 22.10.2024   MyHomeMyData
+
+const instanceHistory = 'influxdb.0';                // Instance of history adapter to be used
+
+const tsScriptStart = new Date().getTime();          // Remember time stamp of start of this script
+
+onMessage('mylinechart', (data, callback) => {
+    // Waiting for messages "mylinechart". Will be sent by adapter flexcharts.
+    lineChart(callback);
+});
+
+function lineChart(callback) {
+    function doChart(data, callback) {
+        const option = {
+            tooltip: { trigger: 'axis', axisPointer: { type: 'shadow'	} },
+            legend: { top: '10%' },
+            title: { text: 'My line chart '+' created by '+scriptName+' - refer to https://github.com/MyHomeMyData/ioBroker.flexcharts', left: 'center' },
+            toolbox: { feature: { dataZoom: { yAxisIndex: 'none' }, restore: {}, saveAsImage: {} } },
+            xAxis: { type: 'time' },
+            yAxis: [
+                { type: 'value', position: 'left', name: 'y-Axis (unit)', axisLine: { show: true } }],
+            dataZoom: [{ type: 'inside', start: 0, end: 100 }, { start: data['dataZoom'], end: 100 }],
+            series: []
+        };
+        for (const s of Object.values(mySeries)) {
+            option.series.push({ name: s.name, type: s.type, yAxisIndex: s.yAxisIndex, color: s.color, stack: s.stack, data: data[s.set]});
+        }
+        callback(option);
+    }
+
+    const mySeries = [ 
+            { stateID: '0_userdata.0.flexcharts.mylinechartdata', set: 'line1', name: 'line 1', type: 'line', color: '#ff0000'}
+            // Optionaly add more data sets here
+            ];
+
+    const tsStart = getTsStart();
+    const tsStop  = new Date().getTime();
+    const dataDict = { cnt: 0 };    // Dict for all chart data
+    for (let i=0; i<mySeries.length; i++) {
+        getHistData(instanceHistory, mySeries[i].stateID, mySeries[i].set, tsStart, tsStop, function(err, set, data) {
+            if (!err) {
+                dataDict[set] = data;
+                dataDict.cnt++;
+            } else {
+                console.log(JSON.stringify(err));
+            }
+            if (dataDict.cnt == mySeries.length) {
+                // All data stored in dadaDict. Create the chart:
+                doChart(dataDict, callback);
+            }
+        });
+    }
+
+}
+
+// Return desired time stamp for starting time of chart
+
+function getTsStart() {
+    return tsScriptStart-1*24*3600*1000;   // Start 1 day before start of this script
+}
+
+// Retrieve data from history adaptert:
+
+function getHistData(idHist, id, set, tsStart, tsStop, callback) {
+    getHistory(idHist, {
+        id:         id,
+        start:      tsStart,
+        end:        tsStop,
+        ack:        true,
+        count:      1000000,
+        aggregate:  'none'
+    }, function (err, result) {
+        const data = [];
+        for (const itm of Object.values(result)) {
+            data.push([new Date(itm.ts), itm.val]);
+        }
+        callback(err, set, data);
+    });
+}