huge refactoring

app/handlers/converter/converter.go

@@ -0,0 +1,118 @@
+package converter
+
+import (
+	"net/http"
+	"os"
+
+	gfile "github.com/gulien/gotenberg/app/handlers/converter/file"
+	"github.com/gulien/gotenberg/app/handlers/converter/process"
+	ghttp "github.com/gulien/gotenberg/app/handlers/http"
+)
+
+type Converter struct {
+	files            []*gfile.File
+	resultFilesPaths []string
+	FinalFilePath    string
+}
+
+func NewConverter(r *http.Request, contentType ghttp.ContentType) (*Converter, error) {
+	c := &Converter{}
+
+	switch contentType {
+	case ghttp.MultipartFormDataContentType:
+		err := r.ParseMultipartForm(32 << 20)
+		if err != nil {
+			return nil, err
+		}
+
+		formData := r.MultipartForm
+		files, ok := formData.File["files"]
+		if !ok {
+			// TODO
+			return nil, nil
+		}
+
+		for i := range files {
+			file, err := files[i].Open()
+			if err != nil {
+				return nil, err
+			}
+
+			defer file.Close()
+
+			f, err := gfile.NewFile(file)
+			if err != nil {
+				// todo err
+				return nil, err
+			}
+
+			c.files = append(c.files, f)
+		}
+		break
+	default:
+		f, err := gfile.NewFile(r.Body)
+		if err != nil {
+			// todo err
+			return nil, err
+		}
+
+		c.files = append(c.files, f)
+	}
+
+	return c, nil
+}
+
+func (c *Converter) Convert() error {
+	if len(c.files) == 0 {
+		return &noFileToConvertError{}
+	}
+
+	var filesPaths []string
+	for _, f := range c.files {
+		if f.Type != gfile.PDFType {
+			path, err := process.ExecConversion(f)
+			if err != nil {
+				return err
+			}
+
+			filesPaths = append(filesPaths, path)
+		} else {
+			filesPaths = append(filesPaths, f.Path)
+		}
+	}
+
+	path, err := process.ExecMerge(filesPaths)
+	if err != nil {
+		return err
+	}
+
+	c.resultFilesPaths = filesPaths
+	c.FinalFilePath = path
+
+	return nil
+}
+
+func (c *Converter) Clear() error {
+	for _, f := range c.files {
+		err := os.Remove(f.Path)
+		if err != nil {
+			return err
+		}
+	}
+
+	for _, path := range c.resultFilesPaths {
+		err := os.Remove(path)
+		if err != nil {
+			return err
+		}
+	}
+
+	if c.FinalFilePath != "" {
+		err := os.Remove(c.FinalFilePath)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}