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result.go
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result.go
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package redis
import (
"errors"
"github.com/gomodule/redigo/redis"
)
// ErrNil reply returned by Redis when key does not exist.
const ErrNil = redis.Error("redis: nil")
type Result struct {
reply any
err error
values []any
valuesOK bool
}
// NewResult returns a Result initialised with reply and err.
func NewResult(reply any, err error) *Result {
return &Result{reply: reply, err: err}
}
func (r *Result) Val() any {
return r.reply
}
func (r *Result) Err() error {
_, err := concreteResult(func(_ any, err error) (any, error) { return nil, err }, nil, r.err)
return err
}
func concreteResult[R any](fn func(any, error) (R, error), v any, err error) (R, error) {
r, err := fn(v, err)
if redis.ErrNil == err {
err = ErrNil
}
return r, err
}
func (r *Result) Int() (int, error) {
return concreteResult(redis.Int, r.reply, r.err)
}
func (r *Result) Int64() (int64, error) {
return concreteResult(redis.Int64, r.reply, r.err)
}
func (r *Result) Uint64() (uint64, error) {
return concreteResult(redis.Uint64, r.reply, r.err)
}
func (r *Result) Float64() (float64, error) {
return concreteResult(redis.Float64, r.reply, r.err)
}
func (r *Result) String() (string, error) {
return concreteResult(redis.String, r.reply, r.err)
}
func (r *Result) Bytes() ([]byte, error) {
return concreteResult(redis.Bytes, r.reply, r.err)
}
func (r *Result) Bool() (bool, error) {
return concreteResult(redis.Bool, r.reply, r.err)
}
func (r *Result) Values() ([]any, error) {
return concreteResult(redis.Values, r.reply, r.err)
}
func (r *Result) Float64s() ([]float64, error) {
return concreteResult(redis.Float64s, r.reply, r.err)
}
func (r *Result) Strings() ([]string, error) {
return concreteResult(redis.Strings, r.reply, r.err)
}
func (r *Result) ByteSlices() ([][]byte, error) {
return concreteResult(redis.ByteSlices, r.reply, r.err)
}
func (r *Result) Int64s() ([]int64, error) {
return concreteResult(redis.Int64s, r.reply, r.err)
}
func (r *Result) Ints() ([]int, error) {
return concreteResult(redis.Ints, r.reply, r.err)
}
func (r *Result) StringMap() (map[string]string, error) {
return concreteResult(redis.StringMap, r.reply, r.err)
}
func (r *Result) IntMap() (map[string]int, error) {
return concreteResult(redis.IntMap, r.reply, r.err)
}
func (r *Result) Int64Map() (map[string]int64, error) {
return concreteResult(redis.Int64Map, r.reply, r.err)
}
func (r *Result) Float64Map() (map[string]float64, error) {
return concreteResult(redis.Float64Map, r.reply, r.err)
}
func (r *Result) Bools() ([]bool, error) {
if values, err := concreteResult(redis.Values, r.reply, r.err); err == nil {
s := make([]bool, len(values))
for i, v := range values {
s[i], err = concreteResult(redis.Bool, v, nil)
if err != nil {
return nil, err
}
}
return s, nil
} else {
return nil, err
}
}
func (r *Result) Uint64s() ([]uint64, error) {
return concreteResult(redis.Uint64s, r.reply, r.err)
}
func (r *Result) Uint64Map() (map[string]uint64, error) {
return concreteResult(redis.Uint64Map, r.reply, r.err)
}
func (r *Result) Positions() ([]*[2]float64, error) {
return concreteResult(redis.Positions, r.reply, r.err)
}
var ErrValuesExhausted = errors.New("redis: values exhausted")
func (r *Result) Scan(dest ...any) error {
if r.values == nil && !r.valuesOK {
r.values, r.err = redis.Values(r.reply, r.err)
r.valuesOK = true
}
if len(r.values) == 0 {
return ErrValuesExhausted
}
var err error
r.values, err = redis.Scan(r.values, dest...)
return err
}
func (r *Result) ScanSlice(dest any, fieldNames ...string) error {
values, err := redis.Values(r.reply, r.err)
if err != nil {
return err
}
return redis.ScanSlice(values, dest, fieldNames...)
}
func (r *Result) ScanStruct(dest any) error {
values, err := redis.Values(r.reply, r.err)
if err != nil {
return err
}
return redis.ScanStruct(values, dest)
}