The provided JavaScript code does the following: 1. **Initialization**: ...

The provided JavaScript code does the following:

1. Initialization:

   • It declares an empty Set called storeSet. A Set in JavaScript is a collection of unique values, meaning it automatically eliminates duplicate entries if you try to add the same value multiple times.

2. Iterate Through Data Series:

   • The code loops through the data series available in the object context.panel.data.series. This object seems to hold the data sets related to the stores (or some sort of metrics relevant to the dashboard).

3. Access and Extract "store" Labels:

   • For each seriesObj in context.panel.data.series, it looks for a specific label reference: seriesObj.meta.custom.labels["metric.label.store"].
   • This is likely extracted from some metadata associated with the data series, and it appears to represent the name or identifier of a store.
   • The label corresponding to ["metric.label.store"] is added to the storeSet. If the store label is already present in storeSet, it won’t be added again due to the nature of a Set.

4. Log Each Store Label:

   • Inside the loop, it logs the store label (seriesObj.meta.custom.labels["metric.label.store"]) to the console for every data series in context.panel.data.series.

5. Log the Complete storeSet to Console:

   • After the loop is completed, it logs the entire storeSet to the console. This set contains all unique store labels gathered from the data series.

How to Populate the Grafana Store Dashboard Variable

If you're looking to populate Grafana's Store dashboard variable with this information, you would typically need to:

1. Convert the storeSet to an array or string, as Grafana’s variables might require these formats.
2. Assign the formatted data to the Grafana variable.

For example, you can achieve this by updating:

const storeSet = new Set();

context.panel.data.series.forEach((seriesObj) => {
  storeSet.add(seriesObj.meta.custom.labels["metric.label.store"]);
  console.log(seriesObj.meta.custom.labels["metric.label.store"]);
});

console.log(storeSet);

// Populate Grafana variable 'Store' with the unique store names
const storesArray = Array.from(storeSet);  // Convert set to array
context.variables.Store.setValue(storesArray);

What This Does:

• After constructing your storeSet, it converts the set into an array using Array.from().
• It assigns this array to the Grafana variable Store via context.variables.Store.setValue(...), assuming that Store is the name of the variable in your Grafana configuration.

This approach completes the process of aggregating and populating the required variable for use in your dashboard.