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replicas.go
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replicas.go
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// Copyright 2023 The PipeCD 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 config
import (
"encoding/json"
"fmt"
"math"
"strconv"
"strings"
)
type Replicas struct {
Number int
IsPercentage bool
}
func (r Replicas) String() string {
s := strconv.FormatInt(int64(r.Number), 10)
if r.IsPercentage {
return s + "%"
}
return s
}
func (r Replicas) Calculate(total, defaultValue int) int {
if r.Number == 0 {
return defaultValue
}
if !r.IsPercentage {
return r.Number
}
num := float64(r.Number*total) / 100.0
return int(math.Ceil(num))
}
func (r Replicas) MarshalJSON() ([]byte, error) {
return json.Marshal(r.String())
}
func (r *Replicas) UnmarshalJSON(b []byte) error {
var v interface{}
if err := json.Unmarshal(b, &v); err != nil {
return err
}
switch raw := v.(type) {
case float64:
*r = Replicas{
Number: int(raw),
IsPercentage: false,
}
return nil
case string:
replicas := Replicas{
IsPercentage: false,
}
if strings.HasSuffix(raw, "%") {
replicas.IsPercentage = true
raw = strings.TrimSuffix(raw, "%")
}
value, err := strconv.Atoi(raw)
if err != nil {
return fmt.Errorf("invalid replicas: %v", err)
}
replicas.Number = value
*r = replicas
return nil
default:
return fmt.Errorf("invalid replicas: %v", string(b))
}
}