/
query_params.go
141 lines (126 loc) · 3.1 KB
/
query_params.go
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package urit
import (
"errors"
"net/url"
"sort"
"strings"
)
type QueryParamsOption interface {
GetQuery() (string, error)
}
type QueryParams interface {
QueryParamsOption
Get(key string) (interface{}, bool)
GetIndex(key string, index int) (interface{}, bool)
Set(key string, value interface{}) QueryParams
Add(key string, value interface{}) QueryParams
Del(key string) QueryParams
Has(key string) bool
Sorted(on bool) QueryParams
Clone() QueryParams
}
func NewQueryParams(namesAndValues ...interface{}) (QueryParams, error) {
if len(namesAndValues)%2 != 0 {
return nil, errors.New("must be a value for each name")
}
result := &queryParams{
params: map[string][]interface{}{},
sorted: true,
}
for i := 0; i < len(namesAndValues)-1; i += 2 {
if k, ok := namesAndValues[i].(string); ok {
result.params[k] = append(result.params[k], namesAndValues[i+1])
} else {
return nil, errors.New("name must be a string")
}
}
return result, nil
}
type queryParams struct {
params map[string][]interface{}
sorted bool
}
func (qp *queryParams) GetQuery() (string, error) {
var qb strings.Builder
if len(qp.params) > 0 {
names := make([]string, 0, len(qp.params))
for name := range qp.params {
names = append(names, name)
}
if qp.sorted {
sort.Strings(names)
}
for _, name := range names {
if v := qp.params[name]; len(v) == 0 || (len(v) == 1 && v[0] == nil) {
qb.WriteString(ampersandOrQuestionMark(qb.Len() == 0))
qb.WriteString(url.QueryEscape(name))
} else {
for _, qv := range v {
qb.WriteString(ampersandOrQuestionMark(qb.Len() == 0))
qb.WriteString(url.QueryEscape(name))
if qv != nil {
if str, err := getValue(qv); err == nil {
qb.WriteString("=")
qb.WriteString(url.QueryEscape(str))
} else {
return "", err
}
}
}
}
}
}
return qb.String(), nil
}
func (qp *queryParams) Get(key string) (interface{}, bool) {
if vs, ok := qp.params[key]; ok && len(vs) > 0 {
return vs[0], true
}
return nil, false
}
func (qp *queryParams) GetIndex(key string, index int) (interface{}, bool) {
if vs, ok := qp.params[key]; ok && len(vs) > 0 {
if index >= 0 && index < len(vs) {
return vs[index], true
} else if index < 0 && (len(vs)+index) >= 0 {
return vs[len(vs)+index], true
}
}
return nil, false
}
func (qp *queryParams) Set(key string, value interface{}) QueryParams {
qp.params[key] = []interface{}{value}
return qp
}
func (qp *queryParams) Add(key string, value interface{}) QueryParams {
qp.params[key] = append(qp.params[key], value)
return qp
}
func (qp *queryParams) Del(key string) QueryParams {
delete(qp.params, key)
return qp
}
func (qp *queryParams) Has(key string) bool {
_, ok := qp.params[key]
return ok
}
func (qp *queryParams) Sorted(on bool) QueryParams {
qp.sorted = on
return qp
}
func (qp *queryParams) Clone() QueryParams {
result := &queryParams{
params: map[string][]interface{}{},
sorted: qp.sorted,
}
for k, v := range qp.params {
result.params[k] = append(v)
}
return result
}
func ampersandOrQuestionMark(first bool) string {
if first {
return "?"
}
return "&"
}