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expression.go
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/
expression.go
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package service
import (
"context"
"fmt"
"errors"
"github.com/PaesslerAG/gval"
"github.com/cortezaproject/corteza/server/pkg/expr"
)
type (
expression struct {
parser gval.Language
}
)
func Expression() *expression {
return &expression{
parser: expr.Parser(),
}
}
func (svc *expression) Evaluate(ctx context.Context, expressions map[string]string, vars map[string]any) (out map[string]any, err error) {
out = make(map[string]any, len(expressions))
evalErrs := make(map[string]error, len(expressions))
hasErr := false
for k, e := range expressions {
out[k], err = svc.parser.Evaluate(e, vars)
evalErrs[k] = err
hasErr = hasErr || err != nil
}
if !hasErr {
return
}
err = nil
errMsg := ""
for k, e := range evalErrs {
if e != nil {
errMsg += fmt.Sprintf("%s: %s\n", k, e.Error())
}
}
return nil, errors.New(errMsg)
}