gmp-service/src/main/java/com/gmp/mock/controller/DocxController.java

package com.gmp.mock.controller;

import jakarta.validation.Valid;

import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBody;

import com.gmp.mock.dto.DocxExportRequest;
import com.gmp.mock.service.DocxService;
import com.gmp.mock.service.DocxService.ExportResult;

@RestController
@RequestMapping("/api/docx")
public class DocxController {

    private final DocxService docxService;

    public DocxController(DocxService docxService) {
        this.docxService = docxService;
    }

    @PostMapping("/export")
    public ResponseEntity<StreamingResponseBody> exportDocx(@Valid @RequestBody DocxExportRequest request) {

        ExportResult result = docxService.export(request.getExportId());

        StreamingResponseBody stream = outputStream ->
                result.writer().write(outputStream);

        return ResponseEntity.ok()
                .contentType(MediaType.parseMediaType(
                        "application/vnd.openxmlformats-officedocument.wordprocessingml.document"))
                .header(HttpHeaders.CONTENT_DISPOSITION,
                        "attachment; filename=\"" + result.fileName() + "\"")
                .body(stream);
    }
}