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routechangerconfig.go
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/
routechangerconfig.go
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package config
import (
"fmt"
"regexp"
"strings"
)
type routeChangerConfigItem struct {
Reg *regexp.Regexp `yaml:"reg"`
Repl string `yaml:"repl"`
Sep string `yaml:"sep"`
}
func (rcci routeChangerConfigItem) String() string {
return rcci.Sep + rcci.Reg.String() + rcci.Sep + rcci.Repl + rcci.Sep
}
type routeChangerConfig []routeChangerConfigItem
func (rcc routeChangerConfig) String() string {
var b strings.Builder
for i, rcci := range rcc {
if i > 0 {
b.WriteString("\n")
}
b.WriteString(rcci.String())
}
return b.String()
}
func (rcc *routeChangerConfig) Set(value string) error {
if len(value) == 0 {
return fmt.Errorf("empty string as an argument is not allowed")
}
firstSym := value[:1]
a := strings.Split(value, firstSym)
if len(a) != 4 {
return fmt.Errorf("unexpected size of string split: %d", len(a))
}
var err error
reg, repl := a[1], a[2]
regex, err := regexp.Compile(reg)
if err != nil {
return err
}
rcci := routeChangerConfigItem{
Reg: regex,
Repl: repl,
Sep: firstSym,
}
*rcc = append(*rcc, rcci)
return err
}
func (rcc *routeChangerConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
var value string
if err := unmarshal(&value); err != nil {
return err
}
return rcc.Set(value)
}