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parser.go
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/
parser.go
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// Package parser is an API blueprint parser and renderer
package parser
import (
"bytes"
"io"
"github.com/bukalapak/snowboard/api"
)
type Parser interface {
Parse(r io.Reader) ([]byte, error)
Validate(r io.Reader) ([]byte, error)
Version() string
}
// Parse formats API blueprint as blueprint.API struct using selected Parser
func Parse(r io.Reader, engine Parser) (*api.API, error) {
el, err := parseElement(r, engine)
if err != nil {
return nil, err
}
return api.NewAPI(el)
}
// ParseAsJSON parse API blueprint as API Element JSON
func ParseAsJSON(r io.Reader, engine Parser) ([]byte, error) {
return engine.Parse(r)
}
// Validate validates API blueprint using selected Parser
func Validate(r io.Reader, engine Parser) (*api.API, error) {
el, err := validateElement(r, engine)
if err == nil && el.Object() == nil {
return nil, nil
}
if err != nil {
return nil, err
}
return api.NewAPI(el)
}
// Load reads API blueprint from file as blueprint.API struct using selected Parser
func Load(name string, engine Parser) (*api.API, error) {
b, err := Read(name)
if err != nil {
return nil, err
}
return Parse(bytes.NewReader(b), engine)
}
// LoadAsJSON reads API blueprint from file as API Element JSON using selected Parser
func LoadAsJSON(name string, engine Parser) ([]byte, error) {
b, err := Read(name)
if err != nil {
return nil, err
}
return ParseAsJSON(bytes.NewReader(b), engine)
}
func parseElement(r io.Reader, engine Parser) (*api.Element, error) {
b, err := ParseAsJSON(r, engine)
if err != nil {
return nil, err
}
return api.ParseJSON(bytes.NewReader(b))
}
func validateElement(r io.Reader, engine Parser) (*api.Element, error) {
b, err := engine.Validate(r)
if err != nil {
return nil, err
}
if len(b) == 0 {
return &api.Element{}, nil
}
return api.ParseJSON(bytes.NewReader(b))
}