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gen.go
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gen.go
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// Copyright 2017 Typeform SL. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package generator
import (
"fmt"
"log"
"os"
"path/filepath"
"github.com/jennyservices/jenny/generator/golang"
"github.com/jennyservices/jenny/generator/internal/ir"
"github.com/jennyservices/jenny/generator/js"
"github.com/jennyservices/jenny/generator/swagger"
"github.com/pkg/errors"
)
type encoder int
type decoder int
const (
Swagger decoder = iota
Golang encoder = iota
JS
Twirp
)
// Generator is an object that can be used to create jenny services
type Generator struct {
out, in string
Package string
filePrefix string
}
// New returns a new generator with the given output directory
func New(in, out string) *Generator {
return &Generator{
in: in,
out: out,
filePrefix: "jenny",
}
}
func (g *Generator) SetPrefix(s string) {
g.filePrefix = s
}
// Generate Generates the necessary folders and files for the typeform service.
func (g *Generator) Generate() error {
dec, err := swagger.NewDecoderFromFile(g.in)
if err != nil {
log.Fatal(err)
}
svc, err := dec.Decode()
if err != nil {
return errors.Wrap(err, "generate")
}
for _, output := range map[string]struct {
file string
encoder encoder
template string
}{
"service": {
file: fmt.Sprintf("%s_service.go", g.filePrefix),
encoder: Golang,
template: "servicebare",
},
"http": {
file: fmt.Sprintf("%s_http.go", g.filePrefix),
encoder: Golang,
template: "servicehttp",
},
// "http_client": {
// file: fmt.Sprintf("%s_http_client.go", g.filePrefix),
// encoder: Golang,
// template: "httpclient",
// },
"client": {
file: fmt.Sprintf("%s_client.js", g.filePrefix),
encoder: JS,
template: "client",
},
} {
f, err := os.Create(filepath.Join(g.out, output.file))
if err != nil {
return errors.Wrap(err, "create file")
}
var enc ir.Encoder
switch output.encoder {
case Golang:
enc = golang.New(f, output.template)
case JS:
enc = js.New(f, output.template)
}
if err := enc.Encode(svc); err != nil {
return errors.Wrap(err, "encoder")
}
}
return nil
}