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package encoding
import (
"fmt"
"strconv"
"strings"
)
// Parameter is a key value pair.
type Parameter struct {
Key string
Value string
}
// Int converts the Value to an int using strconv.Atoi.
func (p Parameter) Int() (int, error) {
return strconv.Atoi(p.Value)
}
const (
// ParameterDefaultItemSeparator is the default item separator.
ParameterDefaultItemSeparator = ","
// ParameterDefaultKeyValueSeparator is the default key value separator.
ParameterDefaultKeyValueSeparator = "="
)
// DecodeParameterStr is an alias for DecodeParameterStrAdvanced using item separator and key value separator
// of ',' and '=' respectively.
func DecodeParameterStr(input string) (opts []Parameter, err error) {
return DecodeParameterStrAdvanced(input, ParameterDefaultItemSeparator, ParameterDefaultKeyValueSeparator)
}
// DecodeParameterStrAdvanced decodes parameter strings into a []Parameter where sepItem separates each parameter, and sepKV separates the key and value.
func DecodeParameterStrAdvanced(input string, sepItem, sepKV string) (opts []Parameter, err error) {
if input == "" {
return nil, fmt.Errorf("empty strings can't be decoded to parameters")
}
o := strings.Split(input, sepItem)
opts = make([]Parameter, len(o))
for i, joined := range o {
kv := strings.SplitN(joined, sepKV, 2)
if len(kv) != 2 {
return nil, fmt.Errorf("parameter pair '%s' is not properly encoded: does not contain kv separator '%s'", joined, sepKV)
}
opts[i] = Parameter{Key: kv[0], Value: kv[1]}
}
return opts, nil
}
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