Implement multi-file upload functionality for companies and enhance file upload routes

internal/company/handler.go

@@ -1,6 +1,8 @@
 package company
 
 import (
+	"mime/multipart"
+
 	"tm/internal/user"
 	"tm/pkg/logger"
 	"tm/pkg/response"
@@ -307,3 +309,70 @@ func (h *Handler) UpdateVerification(c echo.Context) error {
 		"message": "Company verification updated successfully",
 	}, "Company verification updated successfully")
 }
+
+// UploadDocuments uploads multiple documents for a company (Web Panel)
+// @Summary Upload company documents
+// @Description Upload one or more files and attach them to the company (max 20 files per request). Use form field "files" for multiple files.
+// @Tags Admin-Companies
+// @Accept multipart/form-data
+// @Produce json
+// @Param id path string true "Company ID"
+// @Param files formData file true "Files to upload (repeat field for multiple files)"
+// @Success 200 {object} response.APIResponse{data=UploadDocumentsResponse} "Documents uploaded successfully"
+// @Failure 400 {object} response.APIResponse "Bad request - No files or all uploads failed"
+// @Failure 404 {object} response.APIResponse "Not found - Company not found"
+// @Failure 422 {object} response.APIResponse "Validation error - Too many files"
+// @Failure 500 {object} response.APIResponse "Internal server error"
+// @Security BearerAuth
+// @Router /admin/v1/companies/{id}/documents [post]
+func (h *Handler) UploadDocuments(c echo.Context) error {
+	id := c.Param("id")
+	userID, err := user.GetUserIDFromContext(c)
+	if err != nil {
+		return response.Unauthorized(c, "User not authenticated")
+	}
+
+	form, err := c.MultipartForm()
+	if err != nil {
+		return response.ValidationError(c, "Invalid multipart form", err.Error())
+	}
+
+	files := collectCompanyUploadFiles(form)
+	if len(files) == 0 {
+		return response.BadRequest(c, "No files provided", "Use form field \"files\" with one or more files")
+	}
+	if len(files) > maxCompanyDocumentsUpload {
+		return response.ValidationError(c, "Too many files", "Maximum 20 files per request")
+	}
+
+	result, err := h.service.UploadDocuments(c.Request().Context(), id, userID, files)
+	if err != nil {
+		switch err.Error() {
+		case "company not found":
+			return response.NotFound(c, "Company not found")
+		case "no files provided", "too many files in request":
+			return response.BadRequest(c, err.Error(), "")
+		case "all file uploads failed":
+			return response.BadRequest(c, "All file uploads failed", "")
+		default:
+			return response.InternalServerError(c, "Failed to upload company documents")
+		}
+	}
+
+	message := "Company documents uploaded successfully"
+	if len(result.Failed) > 0 {
+		message = "Some company documents uploaded successfully"
+	}
+
+	return response.Success(c, result, message)
+}
+
+func collectCompanyUploadFiles(form *multipart.Form) []*multipart.FileHeader {
+	if form == nil {
+		return nil
+	}
+	if files := form.File["files"]; len(files) > 0 {
+		return files
+	}
+	return form.File["file"]
+}