From 28b3a72f9bafd95d432b16edb3b8eb492b943729 Mon Sep 17 00:00:00 2001
From: tdakkota <tanc13@yandex.ru>
Date: Mon, 10 Jun 2024 21:58:42 +0300
Subject: [PATCH] refactor(promapi): move `MinTime` and `MaxTime`

---
 internal/promapi/promapi.go         | 19 +++++++++++++++++++
 internal/promhandler/params.go      | 17 ++++-------------
 internal/promhandler/promhandler.go | 12 ++++++------
 3 files changed, 29 insertions(+), 19 deletions(-)

diff --git a/internal/promapi/promapi.go b/internal/promapi/promapi.go
index f6caada0..d2590db0 100644
--- a/internal/promapi/promapi.go
+++ b/internal/promapi/promapi.go
@@ -1,2 +1,21 @@
 // Package promapi contains generated code for OpenAPI specification.
 package promapi
+
+import (
+	"math"
+	"time"
+)
+
+// https://github.com/prometheus/prometheus/blob/e9b94515caa4c0d7a0e31f722a1534948ebad838/web/api/v1/api.go#L783-L794
+var (
+	// MinTime is the default timestamp used for the begin of optional time ranges.
+	// Exposed to let downstream projects to reference it.
+	MinTime = time.Unix(math.MinInt64/1000+62135596801, 0).UTC()
+
+	// MaxTime is the default timestamp used for the end of optional time ranges.
+	// Exposed to let downstream projects to reference it.
+	MaxTime = time.Unix(math.MaxInt64/1000-62135596801, 999999999).UTC()
+
+	minTimeFormatted = MinTime.Format(time.RFC3339Nano)
+	maxTimeFormatted = MaxTime.Format(time.RFC3339Nano)
+)
diff --git a/internal/promhandler/params.go b/internal/promhandler/params.go
index df58aeb0..1b5b2bed 100644
--- a/internal/promhandler/params.go
+++ b/internal/promhandler/params.go
@@ -27,18 +27,9 @@ import (
 	"github.com/go-faster/oteldb/internal/promapi"
 )
 
-// / https://github.com/prometheus/prometheus/blob/e9b94515caa4c0d7a0e31f722a1534948ebad838/web/api/v1/api.go#L783-L794
 var (
-	// MinTime is the default timestamp used for the begin of optional time ranges.
-	// Exposed to let downstream projects to reference it.
-	MinTime = time.Unix(math.MinInt64/1000+62135596801, 0).UTC()
-
-	// MaxTime is the default timestamp used for the end of optional time ranges.
-	// Exposed to let downstream projects to reference it.
-	MaxTime = time.Unix(math.MaxInt64/1000-62135596801, 999999999).UTC()
-
-	minTimeFormatted = MinTime.Format(time.RFC3339Nano)
-	maxTimeFormatted = MaxTime.Format(time.RFC3339Nano)
+	minTimeFormatted = promapi.MinTime.Format(time.RFC3339Nano)
+	maxTimeFormatted = promapi.MaxTime.Format(time.RFC3339Nano)
 )
 
 func parseOptTimestamp(t promapi.OptPrometheusTimestamp, or time.Time) (time.Time, error) {
@@ -64,9 +55,9 @@ func parseTimestamp[S ~string](raw S) (time.Time, error) {
 
 	switch s {
 	case minTimeFormatted:
-		return MinTime, nil
+		return promapi.MinTime, nil
 	case maxTimeFormatted:
-		return MaxTime, nil
+		return promapi.MaxTime, nil
 	}
 	return time.Time{}, errors.Errorf("cannot parse %q to a valid timestamp", s)
 }
diff --git a/internal/promhandler/promhandler.go b/internal/promhandler/promhandler.go
index e9fbebe6..5365fe86 100644
--- a/internal/promhandler/promhandler.go
+++ b/internal/promhandler/promhandler.go
@@ -54,11 +54,11 @@ func NewPromAPI(
 // GetLabelValues implements getLabelValues operation.
 // GET /api/v1/label/{label}/values
 func (h *PromAPI) GetLabelValues(ctx context.Context, params promapi.GetLabelValuesParams) (*promapi.LabelValuesResponse, error) {
-	mint, err := parseOptTimestamp(params.Start, MinTime)
+	mint, err := parseOptTimestamp(params.Start, promapi.MinTime)
 	if err != nil {
 		return nil, validationErr("parse start", err)
 	}
-	maxt, err := parseOptTimestamp(params.End, MaxTime)
+	maxt, err := parseOptTimestamp(params.End, promapi.MaxTime)
 	if err != nil {
 		return nil, validationErr("parse end", err)
 	}
@@ -121,11 +121,11 @@ func (h *PromAPI) GetLabelValues(ctx context.Context, params promapi.GetLabelVal
 //
 // GET /api/v1/labels
 func (h *PromAPI) GetLabels(ctx context.Context, params promapi.GetLabelsParams) (*promapi.LabelsResponse, error) {
-	mint, err := parseOptTimestamp(params.Start, MinTime)
+	mint, err := parseOptTimestamp(params.Start, promapi.MinTime)
 	if err != nil {
 		return nil, validationErr("parse start", err)
 	}
-	maxt, err := parseOptTimestamp(params.End, MaxTime)
+	maxt, err := parseOptTimestamp(params.End, promapi.MaxTime)
 	if err != nil {
 		return nil, validationErr("parse end", err)
 	}
@@ -383,11 +383,11 @@ func (h *PromAPI) GetRules(context.Context, promapi.GetRulesParams) (*promapi.Ru
 //
 // GET /api/v1/series
 func (h *PromAPI) GetSeries(ctx context.Context, params promapi.GetSeriesParams) (*promapi.SeriesResponse, error) {
-	mint, err := parseOptTimestamp(params.Start, MinTime)
+	mint, err := parseOptTimestamp(params.Start, promapi.MinTime)
 	if err != nil {
 		return nil, validationErr("parse start", err)
 	}
-	maxt, err := parseOptTimestamp(params.End, MaxTime)
+	maxt, err := parseOptTimestamp(params.End, promapi.MaxTime)
 	if err != nil {
 		return nil, validationErr("parse end", err)
 	}