fraenky8 / tables-to-go

package output

import (

	"io/ioutil"

	"path"

)

const (

	// FileWriterExtension is the extension to write files of.

	FileWriterExtension = ".go"

)

// Writer represents an interface to write the produced struct content.

type Writer interface {

	Write(tableName string, content string) error

}

// FileWriter is a writer that writes to a file given by the path and the table name.

type FileWriter struct {

	path       string

	decorators []Decorator

}

// NewFileWriter constructs a new FileWriter.

func NewFileWriter(path string) *FileWriter {

	return &FileWriter{

		path: path,

		decorators: []Decorator{

			FormatDecorator{},

			ImportDecorator{},

		},

	}

}

// Write is the implementation of the Writer interface. The FilerWriter writes

// decorated content to the file specified by the given path and table name.

func (w FileWriter) Write(tableName string, content string) error {

	fileName := path.Join(w.path, tableName+FileWriterExtension)

	decorated, err := w.decorate(content)

	if err != nil {

		return err

	}

	return ioutil.WriteFile(fileName, []byte(decorated), 0666)

}

// decorate applies some decorations like formatting and empty import removal.

func (w FileWriter) decorate(content string) (decorated string, err error) {

	for _, decorator := range w.decorators {

		content, err = decorator.Decorate(content)

		if err != nil {

			return content, err

		}

	}

	return content, nil

}