wp

mqe/raw.go

@@ -0,0 +1,81 @@
+package mqe
+
+import (
+	"database/sql"
+
+	"gordenko.dev/dima/qb"
+)
+
+type RawMeasure struct {
+	Time  int64   `json:"t"`
+	Value float64 `json:"v"`
+}
+
+type RawMeasuresFilter struct {
+	MetricID   int64         `json:"metricID"`
+	MetricType qb.MetricType `json:"metricType"`
+	Since      int64         `json:"since"` // уже учтен firstHourOfDay
+	Until      int64         `json:"until"` // уже учтен firstHourOfDay
+}
+
+// ListRawMeasures - cписок показаний мгновенных метрик (Температура, Давление, Расход)
+// за за интервал без группировки
+func (s *MeasureQueryEngine) ListRawMeasures(req RawMeasuresFilter) (_ []RawMeasure, err error) {
+	tx, err := s.db.Driver().Begin()
+	if err != nil {
+		return
+	}
+	defer tx.Rollback()
+
+	rows, err := tx.Query(`
+	SELECT tm, value
+	FROM f64
+	WHERE metricID=? AND tm BETWEEN ? AND ?
+	ORDER BY tm ASC`,
+		req.MetricID, req.Since, req.Until)
+	if err != nil {
+		if err == sql.ErrNoRows {
+			err = nil
+		}
+		return
+	}
+	defer rows.Close()
+
+	var result []RawMeasure
+
+	for rows.Next() {
+		var (
+			tm    int64
+			value float64
+		)
+		err = rows.Scan(&tm, &value)
+		if err != nil {
+			return
+		}
+		result = append(result, RawMeasure{
+			Time:  tm,
+			Value: value,
+		})
+	}
+
+	if err = rows.Err(); err != nil {
+		return
+	}
+
+	if len(result) == 0 {
+		return
+	}
+
+	if req.MetricType == qb.Cumulative {
+		var corrections []_f64Correction
+		corrections, err = listF64CorrectionsTx(tx, req.MetricID)
+		if err != nil {
+			return
+		}
+
+		if len(corrections) > 0 {
+			applyCorrectionsToRawMeasures(corrections, result)
+		}
+	}
+	return result, nil
+}