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package config
import (
"fmt"
"strings"
)
// Option defines a key/value entity in a config file.
type Option struct {
// Key preserving original caseness.
// Use IsKey instead to compare key regardless of caseness.
Key string
// Original value as string, could be not normalized.
Value string
}
type Options []*Option
// IsKey returns true if the given key matches
// this option's key in a case-insensitive comparison.
func (o *Option) IsKey(key string) bool {
return strings.ToLower(o.Key) == strings.ToLower(key)
}
func (opts Options) GoString() string {
var strs []string
for _, opt := range opts {
strs = append(strs, fmt.Sprintf("%#v", opt))
}
return strings.Join(strs, ", ")
}
// Get gets the value for the given key if set,
// otherwise it returns the empty string.
//
// Note that there is no difference
//
// This matches git behaviour since git v1.8.1-rc1,
// if there are multiple definitions of a key, the
// last one wins.
//
// See: http://article.gmane.org/gmane.linux.kernel/1407184
//
// In order to get all possible values for the same key,
// use GetAll.
func (opts Options) Get(key string) string {
for i := len(opts) - 1; i >= 0; i-- {
o := opts[i]
if o.IsKey(key) {
return o.Value
}
}
return ""
}
// Has checks if an Option exist with the given key.
func (opts Options) Has(key string) bool {
for _, o := range opts {
if o.IsKey(key) {
return true
}
}
return false
}
// GetAll returns all possible values for the same key.
func (opts Options) GetAll(key string) []string {
result := []string{}
for _, o := range opts {
if o.IsKey(key) {
result = append(result, o.Value)
}
}
return result
}
func (opts Options) withoutOption(key string) Options {
result := Options{}
for _, o := range opts {
if !o.IsKey(key) {
result = append(result, o)
}
}
return result
}
func (opts Options) withAddedOption(key string, value string) Options {
return append(opts, &Option{key, value})
}
func (opts Options) withSettedOption(key string, values ...string) Options {
var result Options
var added []string
for _, o := range opts {
if !o.IsKey(key) {
result = append(result, o)
continue
}
if contains(values, o.Value) {
added = append(added, o.Value)
result = append(result, o)
continue
}
}
for _, value := range values {
if contains(added, value) {
continue
}
result = result.withAddedOption(key, value)
}
return result
}
func contains(haystack []string, needle string) bool {
for _, s := range haystack {
if s == needle {
return true
}
}
return false
}
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