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45 lines
1014 B
Go
45 lines
1014 B
Go
package string
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import (
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"github.com/nalgeon/redka/internal/parser"
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"github.com/nalgeon/redka/internal/redis"
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)
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// Increments the integer value of a key by a number.
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// Uses 0 as initial value if the key doesn't exist.
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// INCRBY key increment
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// https://redis.io/commands/incrby
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//
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// Decrements the integer value of a key by a number.
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// Uses 0 as initial value if the key doesn't exist.
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// DECRBY key increment
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// https://redis.io/commands/decrby
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type IncrBy struct {
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redis.BaseCmd
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key string
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delta int
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}
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func ParseIncrBy(b redis.BaseCmd, sign int) (IncrBy, error) {
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cmd := IncrBy{BaseCmd: b}
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err := parser.New(
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parser.String(&cmd.key),
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parser.Int(&cmd.delta),
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).Required(2).Run(cmd.Args())
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if err != nil {
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return IncrBy{}, err
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}
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cmd.delta *= sign
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return cmd, nil
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}
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func (cmd IncrBy) Run(w redis.Writer, red redis.Redka) (any, error) {
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val, err := red.Str().Incr(cmd.key, cmd.delta)
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if err != nil {
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w.WriteError(cmd.Error(err))
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return nil, err
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}
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w.WriteInt(val)
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return val, nil
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}
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