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metadata_json.go
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metadata_json.go
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// Copyright 2015 Light Code Labs, LLC
//
// 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 metadata
import (
"bytes"
"encoding/json"
)
// JSONParser is the MetadataParser for JSON
type JSONParser struct {
metadata Metadata
markdown *bytes.Buffer
}
// Type returns the kind of metadata parser implemented by this struct.
func (j *JSONParser) Type() string {
return "JSON"
}
// Init prepares the metadata metadata/markdown file and parses it
func (j *JSONParser) Init(b *bytes.Buffer) bool {
m := make(map[string]interface{})
err := json.Unmarshal(b.Bytes(), &m)
if err != nil {
var offset int
jerr, ok := err.(*json.SyntaxError)
if !ok {
return false
}
offset = int(jerr.Offset)
m = make(map[string]interface{})
err = json.Unmarshal(b.Next(offset-1), &m)
if err != nil {
return false
}
}
j.metadata = NewMetadata(m)
j.markdown = bytes.NewBuffer(b.Bytes())
return true
}
// Metadata returns parsed metadata. It should be called
// only after a call to Parse returns without error.
func (j *JSONParser) Metadata() Metadata {
return j.metadata
}
// Markdown returns the markdown text. It should be called only after a call to Parse returns without error.
func (j *JSONParser) Markdown() []byte {
return j.markdown.Bytes()
}