org.pdfgal.pdfgalweb.validators.BookmarkValidator.java Source code

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Here is the source code for org.pdfgal.pdfgalweb.validators.BookmarkValidator.java

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/*
 * PDFGalWeb
 * Copyright (c) 2014, Alejandro Pernas Pan, All rights reserved.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
    
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.
 */

package org.pdfgal.pdfgalweb.validators;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.pdfgal.pdfgal.model.PDFGalBookmark;
import org.pdfgal.pdfgalweb.forms.BookmarkForm;
import org.pdfgal.pdfgalweb.model.enumerated.PDFEncryptionType;
import org.pdfgal.pdfgalweb.utils.PDFGalWebUtils;
import org.pdfgal.pdfgalweb.validators.utils.ValidatorUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;
import org.springframework.web.multipart.MultipartFile;

@Component
public class BookmarkValidator implements Validator {

    @Autowired
    private ValidatorUtils validatorUtils;

    @Autowired
    private PDFGalWebUtils pdfGalWebUtils;

    @Override
    public boolean supports(final Class<?> clazz) {
        return BookmarkForm.class.equals(clazz);
    }

    @Override
    public void validate(final Object target, final Errors errors) {

        final BookmarkForm bookmarkForm = (BookmarkForm) target;

        // File validation
        final MultipartFile file = bookmarkForm.getFile();
        this.validatorUtils.validateFile(file, errors, PDFEncryptionType.NON_ENCRYPTED);

        // Title validation
        ValidationUtils.rejectIfEmptyOrWhitespace(errors, "title", "common.validator.required");

        // Bookmarks validation
        validateBookmarks(file, bookmarkForm.getPagesList(), bookmarkForm.getTextsList(), errors);
    }

    /**
     * Validates the a {@link PDFGalBookmark} list.
     * @param file
     * @param pagesList
     * @param textsList
     * @param errors
     */
    private void validateBookmarks(final MultipartFile file, final List<Integer> pagesList,
            final List<String> textsList, final Errors errors) {

        boolean allEmpty = true;

        if (CollectionUtils.isNotEmpty(pagesList) && CollectionUtils.isNotEmpty(textsList)) {

            if (pagesList.size() != textsList.size()) {
                errors.rejectValue("textsList", "bookmark.validator.bookmarks.incomplete");

            } else {

                final List<Integer> pagesCopy = new ArrayList<Integer>();
                pagesCopy.addAll(pagesList);

                try {
                    final Integer totalPages = this.pdfGalWebUtils.getPages(file);

                    for (int i = 0; i < pagesList.size(); i++) {

                        final Integer page = pagesList.get(i);
                        final String text = textsList.get(i);

                        if (page != null && StringUtils.isNotBlank(text)) {
                            allEmpty = false;

                        } else if (page != null || StringUtils.isNotBlank(text)) {
                            allEmpty = false;
                            errors.rejectValue("textsList", "bookmark.validator.bookmarks.incomplete");
                            break;
                        }

                        if ((page != null) && (totalPages != null) && (page < 1) && (page > totalPages)) {
                            errors.rejectValue("textsList", "bookmark.validator.bookmarks.inexisting");
                            break;
                        }

                        // It is tested that page is not repeated
                        pagesCopy.remove(0);
                        if (page != null && pagesCopy.contains(page)) {
                            errors.rejectValue("textsList", "bookmark.validator.bookmarks.repeated");
                            break;
                        }
                    }
                } catch (final IOException e) {
                    if (!errors.hasErrors()) {
                        errors.rejectValue("textsList", "bookmark.validator.error");
                    }
                }
            }
        }

        if (allEmpty) {
            errors.rejectValue("textsList", "common.validator.required");
        }
    }
}