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39 lines
768 B
Go
39 lines
768 B
Go
package set
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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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// Returns the union of multiple sets.
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// SUNION key [key ...]
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// https://redis.io/commands/sunion
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type SUnion struct {
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redis.BaseCmd
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keys []string
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}
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func ParseSUnion(b redis.BaseCmd) (*SUnion, error) {
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cmd := &SUnion{BaseCmd: b}
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err := parser.New(
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parser.Strings(&cmd.keys),
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).Required(1).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 *SUnion) Run(w redis.Writer, red redis.Redka) (any, error) {
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elems, err := red.Set().Union(cmd.keys...)
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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.WriteArray(len(elems))
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for _, elem := range elems {
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w.WriteBulk(elem)
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}
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return elems, nil
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}
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