// getSessionIDsMatchingIndexes will check inside indexes if it can find sessionIDs matching all filters
// matchedIndexes returns map[matchedFieldName]possibleMatchedFieldVal so we optimize further to avoid checking them
func (smg *SMGeneric) getSessionIDsMatchingIndexes(fltrs map[string]string) (utils.StringMap, map[string]string) {
smg.aSIMux.RLock()
defer smg.aSIMux.RUnlock()
sessionIDxes := smg.aSessionsIndex // Clone here and unlock sooner if getting slow
matchedIndexes := make(map[string]string)
var matchingSessions utils.StringMap
checkNr := 0
for fltrName, fltrVal := range fltrs {
checkNr += 1
if _, hasFldName := sessionIDxes[fltrName]; !hasFldName {
continue
}
if _, hasFldVal := sessionIDxes[fltrName][fltrVal]; !hasFldVal {
matchedIndexes[fltrName] = utils.META_NONE
continue
}
matchedIndexes[fltrName] = fltrVal
if checkNr == 1 { // First run will init the MatchingSessions
matchingSessions = sessionIDxes[fltrName][fltrVal]
continue
}
// Higher run, takes out non matching indexes
for sessID := range sessionIDxes[fltrName][fltrVal] {
if _, hasUUID := matchingSessions[sessID]; !hasUUID {
delete(matchingSessions, sessID)
}
}
}
return matchingSessions.Clone(), matchedIndexes
}
