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task.merge.go
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task.merge.go
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package pipeline
import (
"context"
"github.com/pkg/errors"
"go.uber.org/multierr"
"github.com/smartcontractkit/chainlink/v2/core/logger"
)
// Return types:
//
// map[string]interface{}
type MergeTask struct {
BaseTask `mapstructure:",squash"`
Left string `json:"left"`
Right string `json:"right"`
}
var _ Task = (*MergeTask)(nil)
func (t *MergeTask) Type() TaskType {
return TaskTypeMerge
}
func (t *MergeTask) Run(_ context.Context, _ logger.Logger, vars Vars, inputs []Result) (result Result, runInfo RunInfo) {
_, err := CheckInputs(inputs, 0, 1, 0)
if err != nil {
return Result{Error: errors.Wrap(err, "task inputs")}, runInfo
}
var (
lMap MapParam
rMap MapParam
)
err = multierr.Combine(
errors.Wrap(ResolveParam(&lMap, From(VarExpr(t.Left, vars), JSONWithVarExprs(t.Left, vars, false), Input(inputs, 0))), "left-side"),
errors.Wrap(ResolveParam(&rMap, From(VarExpr(t.Right, vars), JSONWithVarExprs(t.Right, vars, false))), "right-side"),
)
if err != nil {
return Result{Error: err}, runInfo
}
// clobber lMap with rMap values
// "nil" values on the right will clobber
for key, value := range rMap {
lMap[key] = value
}
return Result{Value: lMap.Map()}, runInfo
}