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value.go
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value.go
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// Copyright 2020 Soluble Inc
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package print
import (
"encoding/json"
"fmt"
"io"
"os"
"regexp"
"strings"
"github.com/soluble-ai/go-jnode"
"github.com/soluble-ai/soluble-cli/pkg/log"
)
type ValuePrinter struct {
PathSupport
Format string
}
var _ Interface = &ValuePrinter{}
var valueSpecRe = regexp.MustCompile(`value\((.*)\)`)
func (p *ValuePrinter) PrintResult(w io.Writer, result *jnode.Node) int {
m := valueSpecRe.FindStringSubmatch(p.Format)
if m == nil || m[1] == "" {
log.Warnf("invalid value specifier {warning:%s} - must be in the form 'value(name)'", p.Format)
os.Exit(2)
}
name := strings.Split(m[1], ".")
if p.Path == nil {
n := Nav(result, name)
if p.print(w, n) {
return 1
}
return 0
} else {
rows := p.GetRows(result)
for _, row := range rows {
n := Nav(row, name)
p.print(w, n)
}
return len(rows)
}
}
func (p *ValuePrinter) print(w io.Writer, n *jnode.Node) bool {
if n.IsMissing() {
return false
}
switch {
case n.IsObject() || n.IsArray():
enc := json.NewEncoder(w)
enc.SetEscapeHTML(false)
enc.SetIndent("", " ")
_ = enc.Encode(n)
case n.GetType() == jnode.Binary:
dat, _ := n.AsBinary()
_, _ = w.Write(dat)
default:
fmt.Fprintln(w, n.AsText())
}
return true
}