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parameter.go
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parameter.go
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package internal
import (
"fmt"
"slices"
"strings"
)
type ParameterItems []ParameterItem
// String implements fmt.Stringer interface
func (ssp ParameterItems) String() string {
var results []string
sortedPairs := append([]ParameterItem{}, ssp...)
slices.SortFunc(sortedPairs, func(a, b ParameterItem) int {
return strings.Compare(a.keys.String(), b.keys.String())
})
for _, item := range sortedPairs {
if len(item.Values()) == 0 {
continue
}
str := item.String()
results = append(results, str)
}
return strings.Join(results, "&")
}
func (ssp *ParameterItems) Add(keys []Key, values []string) {
index := ssp.FindIndex(keys)
if index == -1 {
*ssp = append(*ssp, NewParameterItem(keys, values))
return
}
(*ssp)[index].AddValues(values)
}
func (ssp ParameterItems) FindDefault() *ParameterItem {
item, _ := ssp.find([]Key{})
if item != nil {
return item
}
item, _ = ssp.find([]Key{})
return item
}
func (ssp ParameterItems) Find(keys []Key) *ParameterItem {
item, _ := ssp.find(keys)
return item
}
func (ssp ParameterItems) FindIndex(keys []Key) int {
_, i := ssp.find(keys)
return i
}
func (ssp ParameterItems) find(keys []Key) (*ParameterItem, int) {
for i, item := range ssp {
if len(keys) != len(item.keys) {
continue
}
if len(keys) == 0 {
return &item, i
}
isEqual := false
for j, value := range item.keys {
isEqual = value == keys[j]
if !isEqual {
return nil, -1
}
}
}
return nil, -1
}
// Keys represent a key slice
type Keys []Key
// String implements fmt.Stringer interface
func (ks Keys) String() string {
if len(ks) == 0 {
return ""
}
var sb strings.Builder
for i, k := range ks {
if k.index != nil {
sb.WriteString(fmt.Sprintf("[%d]", *k.index))
continue
}
if k.key != "" {
if i > 0 {
sb.WriteRune('.')
}
sb.WriteString(k.key)
}
}
return sb.String()
}
// Key represents a key string or index
type Key struct {
key string
index *int
}
// NewIndexKey creates an index key
func NewIndexKey(index int) Key {
return Key{index: &index}
}
// NewKey creates a string key
func NewKey(key string) Key {
return Key{key: key}
}
// IsEmpty checks if the key is empty
func (k Key) IsEmpty() bool {
return k.key == "" && k.index == nil
}
// Key gets the string key
func (k Key) Key() string {
return k.key
}
// Index gets the integer key
func (k Key) Index() *int {
return k.index
}
// String implements fmt.Stringer interface
func (k Key) String() string {
if k.index != nil {
return fmt.Sprint(*k.index)
}
return k.key
}
// ParameterItem represents the key-value slice pair
type ParameterItem struct {
keys Keys
values []string
}
// NewParameterItem creates a parameter value pair
func NewParameterItem(keys Keys, values []string) ParameterItem {
return ParameterItem{
keys: keys,
values: values,
}
}
// String implements fmt.Stringer interface
func (ssp ParameterItem) String() string {
key := ssp.keys.String()
value := strings.Join(ssp.values, ",")
if key == "" {
return value
}
return fmt.Sprintf("%s=%s", key, value)
}
// Keys returns keys of the parameter item
func (ssp ParameterItem) Keys() Keys {
return ssp.keys
}
func (ssp ParameterItem) Values() []string {
return ssp.values
}
func (ssp *ParameterItem) Add(key Key, value string) {
ssp.AddKey(key)
ssp.AddValue(value)
}
func (ssp *ParameterItem) AddKey(key Key) {
ssp.keys = append(ssp.keys, key)
}
func (ssp *ParameterItem) AddKeys(keys []Key) {
ssp.keys = append(ssp.keys, keys...)
}
func (ssp *ParameterItem) AddValue(value string) {
ssp.values = append(ssp.values, value)
}
func (ssp *ParameterItem) AddValues(values []string) {
ssp.values = append(ssp.values, values...)
}
func (ssp *ParameterItem) PrependKey(key Key) {
ssp.keys = append([]Key{key}, ssp.keys...)
}
func (ssp *ParameterItem) PrependKeys(keys []Key) {
ssp.keys = append(keys, ssp.keys...)
}
func (ssp *ParameterItem) PrependValue(value string) {
ssp.values = append([]string{value}, ssp.values...)
}
func (ssp *ParameterItem) PrependValues(values []string) {
ssp.values = append(values, ssp.values...)
}