1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
// Copyright 2024 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package templates
import (
"errors"
"fmt"
"math"
"strconv"
"time"
"github.com/prometheus/common/model"
)
var errNaNOrInf = errors.New("value is NaN or Inf")
func ConvertToFloat(i interface{}) (float64, error) {
switch v := i.(type) {
case float64:
return v, nil
case string:
return strconv.ParseFloat(v, 64)
case int:
return float64(v), nil
case uint:
return float64(v), nil
case int64:
return float64(v), nil
case uint64:
return float64(v), nil
case time.Duration:
return v.Seconds(), nil
default:
return 0, fmt.Errorf("can't convert %T to float", v)
}
}
func FloatToTime(v float64) (*time.Time, error) {
if math.IsNaN(v) || math.IsInf(v, 0) {
return nil, errNaNOrInf
}
timestamp := v * 1e9
if timestamp > math.MaxInt64 || timestamp < math.MinInt64 {
return nil, fmt.Errorf("%v cannot be represented as a nanoseconds timestamp since it overflows int64", v)
}
t := model.TimeFromUnixNano(int64(timestamp)).Time().UTC()
return &t, nil
}
func HumanizeDuration(i interface{}) (string, error) {
v, err := ConvertToFloat(i)
if err != nil {
return "", err
}
if math.IsNaN(v) || math.IsInf(v, 0) {
return fmt.Sprintf("%.4g", v), nil
}
if v == 0 {
return fmt.Sprintf("%.4gs", v), nil
}
if math.Abs(v) >= 1 {
sign := ""
if v < 0 {
sign = "-"
v = -v
}
duration := int64(v)
seconds := duration % 60
minutes := (duration / 60) % 60
hours := (duration / 60 / 60) % 24
days := duration / 60 / 60 / 24
// For days to minutes, we display seconds as an integer.
if days != 0 {
return fmt.Sprintf("%s%dd %dh %dm %ds", sign, days, hours, minutes, seconds), nil
}
if hours != 0 {
return fmt.Sprintf("%s%dh %dm %ds", sign, hours, minutes, seconds), nil
}
if minutes != 0 {
return fmt.Sprintf("%s%dm %ds", sign, minutes, seconds), nil
}
// For seconds, we display 4 significant digits.
return fmt.Sprintf("%s%.4gs", sign, v), nil
}
prefix := ""
for _, p := range []string{"m", "u", "n", "p", "f", "a", "z", "y"} {
if math.Abs(v) >= 1 {
break
}
prefix = p
v *= 1000
}
return fmt.Sprintf("%.4g%ss", v, prefix), nil
}
func HumanizeTimestamp(i interface{}) (string, error) {
v, err := ConvertToFloat(i)
if err != nil {
return "", err
}
tm, err := FloatToTime(v)
switch {
case errors.Is(err, errNaNOrInf):
return fmt.Sprintf("%.4g", v), nil
case err != nil:
return "", err
}
return fmt.Sprint(tm), nil
}
|
