// filterTagSet takes a `series` and filters its `tags` based on whether it needs to `collapse` or group on these tags.
// if `collapses` is false, then tags not found in the `tags` list will be deleted. If `collapses` is true, then tags found in `tags` will be deleted.
func filterTagSet(series api.Timeseries, tags []string, collapses bool) api.Timeseries {
if collapses {
series.TagSet = startingCollase(series.TagSet, tags)
} else {
series.TagSet = startingGroup(series.TagSet, tags)
}
return series
}
// setTagSeries returns a copy of the timeseries where the given `newTag` has been set to `newValue`, or added if it wasn't present.
func setTagSeries(series api.Timeseries, newTag string, newValue string) api.Timeseries {
tagSet := api.NewTagSet()
for tag, val := range series.TagSet {
tagSet[tag] = val
}
tagSet[newTag] = newValue
series.TagSet = tagSet
return series
}
// dropTagSeries returns a copy of the timeseries where the given `dropTag` has been removed from its TagSet.
func dropTagSeries(series api.Timeseries, dropTag string) api.Timeseries {
tagSet := api.NewTagSet()
for tag, val := range series.TagSet {
if tag != dropTag {
tagSet[tag] = val
}
}
series.TagSet = tagSet
return series
}