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39 lines
770 B
Go
39 lines
770 B
Go
package list
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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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// Prepends an element to a list.
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// Creates the key if it doesn't exist.
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// LPUSH key element
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// https://redis.io/commands/lpush
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type LPush struct {
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redis.BaseCmd
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key string
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elem []byte
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}
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func ParseLPush(b redis.BaseCmd) (*LPush, error) {
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cmd := &LPush{BaseCmd: b}
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err := parser.New(
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parser.String(&cmd.key),
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parser.Bytes(&cmd.elem),
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).Required(2).Run(cmd.Args())
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if err != nil {
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return nil, err
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}
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return cmd, nil
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}
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func (cmd *LPush) Run(w redis.Writer, red redis.Redka) (any, error) {
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n, err := red.List().PushFront(cmd.key, cmd.elem)
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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(n)
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return n, nil
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}
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