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Move roundInterval from intervalv2 grafana/grafana (#887)
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‎backend/gtime/gtime.go‎

Lines changed: 100 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -166,3 +166,103 @@ func ParseIntervalStringToTimeDuration(interval string) (time.Duration, error) {
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}
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return parsedInterval, nil
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}
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// RoundInterval returns a predetermined, lower and rounder duration than the given
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//
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//nolint:gocyclo
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func RoundInterval(interval time.Duration) time.Duration {
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switch {
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// 0.01s
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case interval <= 10*time.Millisecond:
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return time.Millisecond * 1 // 0.001s
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// 0.015s
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case interval <= 15*time.Millisecond:
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return time.Millisecond * 10 // 0.01s
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// 0.035s
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case interval <= 35*time.Millisecond:
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return time.Millisecond * 20 // 0.02s
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// 0.075s
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case interval <= 75*time.Millisecond:
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return time.Millisecond * 50 // 0.05s
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// 0.15s
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case interval <= 150*time.Millisecond:
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return time.Millisecond * 100 // 0.1s
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// 0.35s
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case interval <= 350*time.Millisecond:
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return time.Millisecond * 200 // 0.2s
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// 0.75s
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case interval <= 750*time.Millisecond:
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return time.Millisecond * 500 // 0.5s
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// 1.5s
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case interval <= 1500*time.Millisecond:
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return time.Millisecond * 1000 // 1s
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// 3.5s
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case interval <= 3500*time.Millisecond:
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return time.Millisecond * 2000 // 2s
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// 7.5s
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case interval <= 7500*time.Millisecond:
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return time.Millisecond * 5000 // 5s
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// 12.5s
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case interval <= 12500*time.Millisecond:
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return time.Millisecond * 10000 // 10s
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// 17.5s
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case interval <= 17500*time.Millisecond:
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return time.Millisecond * 15000 // 15s
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// 25s
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case interval <= 25000*time.Millisecond:
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return time.Millisecond * 20000 // 20s
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// 45s
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case interval <= 45000*time.Millisecond:
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return time.Millisecond * 30000 // 30s
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// 1.5m
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case interval <= 90000*time.Millisecond:
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return time.Millisecond * 60000 // 1m
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// 3.5m
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case interval <= 210000*time.Millisecond:
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return time.Millisecond * 120000 // 2m
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// 7.5m
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case interval <= 450000*time.Millisecond:
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return time.Millisecond * 300000 // 5m
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// 12.5m
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case interval <= 750000*time.Millisecond:
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return time.Millisecond * 600000 // 10m
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// 17.5m
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case interval <= 1050000*time.Millisecond:
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return time.Millisecond * 900000 // 15m
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// 25m
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case interval <= 1500000*time.Millisecond:
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return time.Millisecond * 1200000 // 20m
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// 45m
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case interval <= 2700000*time.Millisecond:
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return time.Millisecond * 1800000 // 30m
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// 1.5h
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case interval <= 5400000*time.Millisecond:
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return time.Millisecond * 3600000 // 1h
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// 2.5h
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case interval <= 9000000*time.Millisecond:
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return time.Millisecond * 7200000 // 2h
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// 4.5h
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case interval <= 16200000*time.Millisecond:
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return time.Millisecond * 10800000 // 3h
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// 9h
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case interval <= 32400000*time.Millisecond:
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return time.Millisecond * 21600000 // 6h
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// 24h
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case interval <= 86400000*time.Millisecond:
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return time.Millisecond * 43200000 // 12h
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// 48h
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case interval <= 172800000*time.Millisecond:
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return time.Millisecond * 86400000 // 24h
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// 1w
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case interval <= 604800000*time.Millisecond:
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return time.Millisecond * 86400000 // 24h
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// 3w
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case interval <= 1814400000*time.Millisecond:
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return time.Millisecond * 604800000 // 1w
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// 2y
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case interval < 3628800000*time.Millisecond:
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return time.Millisecond * 2592000000 // 30d
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default:
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return time.Millisecond * 31536000000 // 1y
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}
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}

‎backend/gtime/gtime_test.go‎

Lines changed: 45 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -183,3 +183,48 @@ func TestParseIntervalStringToTimeDuration(t *testing.T) {
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})
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}
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}
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func TestRoundInterval(t *testing.T) {
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tcs := []struct {
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input time.Duration
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expected time.Duration
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}{
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{input: 9 * time.Millisecond, expected: time.Millisecond * 1},
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{input: 14 * time.Millisecond, expected: time.Millisecond * 10},
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{input: 34 * time.Millisecond, expected: time.Millisecond * 20},
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{input: 74 * time.Millisecond, expected: time.Millisecond * 50},
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{input: 140 * time.Millisecond, expected: time.Millisecond * 100},
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{input: 320 * time.Millisecond, expected: time.Millisecond * 200},
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{input: 740 * time.Millisecond, expected: time.Millisecond * 500},
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{input: 1400 * time.Millisecond, expected: time.Millisecond * 1000},
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{input: 3200 * time.Millisecond, expected: time.Millisecond * 2000},
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{input: 7400 * time.Millisecond, expected: time.Millisecond * 5000},
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{input: 12400 * time.Millisecond, expected: time.Millisecond * 10000},
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{input: 17250 * time.Millisecond, expected: time.Millisecond * 15000},
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{input: 23000 * time.Millisecond, expected: time.Millisecond * 20000},
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{input: 42000 * time.Millisecond, expected: time.Millisecond * 30000},
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{input: 85000 * time.Millisecond, expected: time.Millisecond * 60000},
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{input: 200000 * time.Millisecond, expected: time.Millisecond * 120000},
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{input: 420000 * time.Millisecond, expected: time.Millisecond * 300000},
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{input: 720000 * time.Millisecond, expected: time.Millisecond * 600000},
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{input: 1000000 * time.Millisecond, expected: time.Millisecond * 900000},
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{input: 1250000 * time.Millisecond, expected: time.Millisecond * 1200000},
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{input: 2500000 * time.Millisecond, expected: time.Millisecond * 1800000},
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{input: 5200000 * time.Millisecond, expected: time.Millisecond * 3600000},
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{input: 8500000 * time.Millisecond, expected: time.Millisecond * 7200000},
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{input: 15000000 * time.Millisecond, expected: time.Millisecond * 10800000},
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{input: 30000000 * time.Millisecond, expected: time.Millisecond * 21600000},
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{input: 85000000 * time.Millisecond, expected: time.Millisecond * 43200000},
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{input: 150000000 * time.Millisecond, expected: time.Millisecond * 86400000},
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{input: 600000000 * time.Millisecond, expected: time.Millisecond * 86400000},
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{input: 1500000000 * time.Millisecond, expected: time.Millisecond * 604800000},
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{input: 3500000000 * time.Millisecond, expected: time.Millisecond * 2592000000},
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{input: 40000000000 * time.Millisecond, expected: time.Millisecond * 31536000000},
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}
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for i, tc := range tcs {
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t.Run(fmt.Sprintf("testcase %d", i), func(t *testing.T) {
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res := RoundInterval(tc.input)
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require.Equal(t, tc.expected, res, "input %q", tc.input)
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})
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}
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}

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