feat: add 7.x source code

pkg/modules/pdfengines/routes.go

@@ -0,0 +1,138 @@
+package pdfengines
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+
+	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	"github.com/gotenberg/gotenberg/v7/pkg/modules/api"
+)
+
+// mergeRoute returns an api.MultipartFormDataRoute which can merge PDFs.
+func mergeRoute(engine gotenberg.PDFEngine) api.MultipartFormDataRoute {
+	return api.MultipartFormDataRoute{
+		Path: "/pdfengines/merge",
+		Handler: func(ctx *api.Context) error {
+			// Let's get the data from the form and validate them.
+			var (
+				inputPaths []string
+				PDFformat  string
+			)
+
+			err := ctx.FormData().
+				MandatoryPaths([]string{".pdf"}, &inputPaths).
+				String("pdfFormat", &PDFformat, "").
+				Validate()
+
+			if err != nil {
+				return fmt.Errorf("validate form data: %w", err)
+			}
+
+			// Alright, let's merge the PDFs.
+
+			outputPath := ctx.GeneratePath(".pdf")
+
+			err = engine.Merge(ctx, ctx.Log(), inputPaths, outputPath)
+			if err != nil {
+				return fmt.Errorf("merge PDFs: %w", err)
+			}
+
+			// So far so good, the PDFs are merged into one unique PDF.
+			// Now, let's check if the client want to convert this result PDF
+			// to a specific PDF format.
+
+			if PDFformat != "" {
+				convertInputPath := outputPath
+				convertOutputPath := ctx.GeneratePath(".pdf")
+
+				err = engine.Convert(ctx, ctx.Log(), PDFformat, convertInputPath, convertOutputPath)
+
+				if err != nil {
+					if errors.Is(err, gotenberg.ErrPDFFormatNotAvailable) {
+						return api.WrapError(
+							fmt.Errorf("convert PDF: %w", err),
+							api.NewSentinelHTTPError(
+								http.StatusBadRequest,
+								fmt.Sprintf("At least one PDF engine does not handle the PDF format '%s' (pdfFormat), while other have failed to convert for other reasons", PDFformat),
+							),
+						)
+					}
+
+					return fmt.Errorf("convert PDF: %w", err)
+				}
+
+				// Important: the output path is now the converted file.
+				outputPath = convertOutputPath
+			}
+
+			// Last but not least, add the output path to the context so that
+			// the API is able to send it as a response to the client.
+
+			err = ctx.AddOutputPaths(outputPath)
+			if err != nil {
+				return fmt.Errorf("add output path: %w", err)
+			}
+
+			return nil
+		},
+	}
+}
+
+// convertRoute returns an api.MultipartFormDataRoute which can convert a PDF
+// to a specific PDF format.
+func convertRoute(engine gotenberg.PDFEngine) api.MultipartFormDataRoute {
+	return api.MultipartFormDataRoute{
+		Path: "/pdfengines/convert",
+		Handler: func(ctx *api.Context) error {
+			// Let's get the data from the form and validate them.
+			var (
+				inputPaths []string
+				PDFformat  string
+			)
+
+			err := ctx.FormData().
+				MandatoryPaths([]string{".pdf"}, &inputPaths).
+				MandatoryString("pdfFormat", &PDFformat).
+				Validate()
+
+			if err != nil {
+				return fmt.Errorf("validate form data: %w", err)
+			}
+
+			// Alright, let's merge the PDFs.
+
+			outputPaths := make([]string, len(inputPaths))
+
+			for i, inputPath := range inputPaths {
+				outputPaths[i] = ctx.GeneratePath(".pdf")
+
+				err = engine.Convert(ctx, ctx.Log(), PDFformat, inputPath, outputPaths[i])
+
+				if err != nil {
+					if errors.Is(err, gotenberg.ErrPDFFormatNotAvailable) {
+						return api.WrapError(
+							fmt.Errorf("convert PDF: %w", err),
+							api.NewSentinelHTTPError(
+								http.StatusBadRequest,
+								fmt.Sprintf("At least one PDF engine does not handle the PDF format '%s' (pdfFormat), while other have failed to convert for other reasons", PDFformat),
+							),
+						)
+					}
+
+					return fmt.Errorf("convert PDF: %w", err)
+				}
+			}
+
+			// Last but not least, add the output paths to the context so that
+			// the API is able to send them as a response to the client.
+
+			err = ctx.AddOutputPaths(outputPaths...)
+			if err != nil {
+				return fmt.Errorf("add output paths: %w", err)
+			}
+
+			return nil
+		},
+	}
+}