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map.go
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map.go
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package util
import (
"encoding/xml"
"fmt"
"net/url"
"strings"
"github.com/pkg/errors"
"github.com/samber/lo"
)
type ValueMap map[string]any
func ValueMapFor(kvs ...any) ValueMap {
ret := make(ValueMap, len(kvs)/2)
ret.Add(kvs...)
return ret
}
func (m ValueMap) Add(kvs ...any) {
for i := 0; i < len(kvs); i += 2 {
k, ok := kvs[i].(string)
if !ok {
k = fmt.Sprintf("error-invalid-type:%T", kvs[i])
}
m[k] = kvs[i+1]
}
}
func (m ValueMap) Merge(args ...ValueMap) ValueMap {
ret := m.Clone()
lo.ForEach(args, func(arg ValueMap, _ int) {
for k, v := range arg {
ret[k] = v
}
})
return ret
}
func (m ValueMap) Filter(keys []string) ValueMap {
filteredMap := ValueMap{}
lo.ForEach(keys, func(key string, _ int) {
if data, ok := m[key]; ok {
filteredMap[key] = data
}
})
return filteredMap
}
func (m ValueMap) Overwrite(sourceMap ValueMap) ValueMap {
destMap := m.Clone()
for key, data := range sourceMap {
destMap[key] = data
}
return destMap
}
func (m ValueMap) HasKey(key string) bool {
_, ok := m[key]
return ok
}
func (m ValueMap) Keys() []string {
return ArraySorted(lo.Keys(m))
}
func (m ValueMap) KeysAndValues() ([]string, []any) {
cols := ArraySorted(lo.Keys(m))
vals := lo.Map(cols, func(col string, _ int) any {
return m[col]
})
return cols, vals
}
func (m ValueMap) Clone() ValueMap {
ret := make(ValueMap, len(m))
for k, v := range m {
ret[k] = v
}
return ret
}
func (m ValueMap) WithoutKeys(keys ...string) ValueMap {
ret := m.Clone()
for _, key := range keys {
delete(ret, key)
}
return ret
}
func (m ValueMap) String() string {
return ToJSONCompact(m)
}
func (m ValueMap) JSON() string {
return ToJSON(m)
}
func (m ValueMap) ToStringMap() map[string]string {
return lo.MapValues(m, func(_ any, key string) string {
return m.GetStringOpt(key)
})
}
func (m ValueMap) ToQueryString() string {
params := url.Values{}
for k, v := range m {
params.Add(k, fmt.Sprint(v))
}
return params.Encode()
}
func (m ValueMap) AsChanges() (ValueMap, error) {
const selectedSuffix = "--selected"
var keys []string
vals := ValueMap{}
for k, v := range m {
if strings.HasSuffix(k, selectedSuffix) {
key := strings.TrimSuffix(k, selectedSuffix)
keys = append(keys, key)
} else {
curr, ok := vals[k]
if ok {
return nil, errors.Errorf("multiple values presented for [%s] (%T/%T)", k, curr, v)
}
vals[k] = v
}
}
return lo.Associate(keys, func(k string) (string, any) {
return k, vals[k]
}), nil
}
func (m ValueMap) MarshalXML(e *xml.Encoder, _ xml.StartElement) error {
err := e.EncodeToken(xml.StartElement{Name: xml.Name{Local: "map"}})
if err != nil {
return err
}
for key, value := range m {
err = e.EncodeElement(value, xml.StartElement{Name: xml.Name{Local: key}})
if err != nil {
return err
}
}
err = e.EncodeToken(xml.EndElement{Name: xml.Name{Local: "map"}})
if err != nil {
return err
}
return e.Flush()
}
func ValueMapGet[T any](m ValueMap, pth string) (T, error) {
x, err := m.GetPath(pth, false)
if err != nil {
return DefaultValue[T](), err
}
ret, ok := x.(T)
if !ok {
var df T
return df, errors.Errorf("map value is of type [%T], expected [%T]", x, df)
}
return ret, nil
}