feat(influxdb): add real support for time ranges

pkg/tsdb/influxdb/models.go

 package influxdb
 
+import "github.com/grafana/grafana/pkg/tsdb"
+
 type Query struct {
 	Measurement  string
 	Policy       string
@@ -8,7 +10,8 @@ type Query struct {
 	GroupBy      []*QueryPart
 	Selects      []*Select
 
-	Interval string
+	Interval  string
+	TimeRange tsdb.TimeRange
 }
 
 type Tag struct {

pkg/tsdb/influxdb/query_builder.go

@@ -40,9 +40,14 @@ func (*QueryBuilder) Build(query *Query, queryContext *tsdb.QueryContext) (strin
 }
 
 func renderTimeFilter(query *Query) string {
-	//res += "$timeFilter"
-	//res += "time > now() -" + strings.Replace(queryContext.TimeRange.From, "now", "", 1)
-	return "time > now() - 5m"
+	from := "now() - " + query.TimeRange.From
+	to := ""
+
+	if query.TimeRange.To != "now" && query.TimeRange.To != "" {
+		to = " and time < now() - " + strings.Replace(query.TimeRange.To, "now-", "", 1)
+	}
+
+	return fmt.Sprintf("time > %s%s", from, to)
 }
 
 func renderSelectors(query *Query) string {

pkg/tsdb/influxdb/query_builder_test.go

@@ -8,6 +8,7 @@ import (
 )
 
 func TestInfluxdbQueryBuilder(t *testing.T) {
+
 	Convey("Influxdb query builder", t, func() {
 		builder := QueryBuilder{}
 
@@ -31,6 +32,7 @@ func TestInfluxdbQueryBuilder(t *testing.T) {
 				Policy:      "policy",
 				GroupBy:     []*QueryPart{groupBy1, groupBy2},
 				Interval:    "10s",
+				TimeRange:   tsdb.TimeRange{From: "5m"},
 			}
 
 			rawQuery, err := builder.Build(query, queryContext)
@@ -45,11 +47,24 @@ func TestInfluxdbQueryBuilder(t *testing.T) {
 				GroupBy:     []*QueryPart{groupBy1},
 				Tags:        []*Tag{tag1, tag2},
 				Interval:    "5s",
+				TimeRange:   tsdb.TimeRange{From: "1h", To: "now-1m"},
 			}
 
 			rawQuery, err := builder.Build(query, queryContext)
 			So(err, ShouldBeNil)
-			So(rawQuery, ShouldEqual, `SELECT mean("value") FROM "cpu" WHERE "hostname" = 'server1' OR "hostname" = 'server2' AND time > now() - 5m GROUP BY time(10s)`)
+			So(rawQuery, ShouldEqual, `SELECT mean("value") FROM "cpu" WHERE "hostname" = 'server1' OR "hostname" = 'server2' AND time > now() - 1h and time < now() - 1m GROUP BY time(10s)`)
+		})
+
+		Convey("can render time range", func() {
+			Convey("render from: 2h to now-1h", func() {
+				query := Query{TimeRange: tsdb.TimeRange{From: "2h", To: "now-1h"}}
+				So(renderTimeFilter(&query), ShouldEqual, "time > now() - 2h and time < now() - 1h")
+			})
+
+			Convey("render from: 10m", func() {
+				query := Query{TimeRange: tsdb.TimeRange{From: "10m"}}
+				So(renderTimeFilter(&query), ShouldEqual, "time > now() - 10m")
+			})
 		})
 	})
 }