//NewBuilder creates a build instance using the JSON schema data from the given filename. If modelName and/or pkgName
//are left empty the title-attribute of the JSON schema is used for:
// => struct-name (singular, camelcase e.g contact => Contact)
// => package name (pluralize, lowercased e.g. payment_reminder => paymentreminders)
func NewBuilder(inputFile string, modelName string, pkgName string) (builder Builder) {
builder = Builder{}
// try to read input file
raw, err := ioutil.ReadFile(inputFile)
if err != nil {
msg := fmt.Sprintf("File error: %s", err)
builder.Errors = append(builder.Errors, msg)
return
}
builder.InputFile = inputFile
builder.SchemaRaw = raw
// try parsing json
if err := json.Unmarshal(builder.SchemaRaw, &builder.SchemaJSON); err != nil {
msg := fmt.Sprintf("JSON error: %s", err)
builder.Errors = append(builder.Errors, msg)
return
}
// defer model name from schema.title if not given as argument, schema['title'] MUST be set
if len(modelName) > 0 {
builder.ModelName = modelName
} else {
builder.ModelName = inflect.Typeify(builder.SchemaJSON["title"].(string))
}
// defer package name from schema.title if not given as argument
if len(pkgName) > 0 {
builder.PkgName = pkgName
} else {
//Pluralize no underscores
builder.PkgName = strings.ToLower(inflect.Camelize(inflect.Pluralize(builder.SchemaJSON["title"].(string))))
}
return
}
// writeConst is a helper function that writes the
// body string to a Go const variable.
func writeConst(w io.Writer, body string, label ...string) {
// create a snake case variable name from
// the specified labels. Then convert the
// variable name to a quoted, camel case string.
name := strings.Join(label, "_")
name = inflect.Typeify(name)
// quote the body using multi-line quotes
body = fmt.Sprintf(sQuote, body)
fmt.Fprintf(w, sConst, name, body)
}