xref: /webtrees/app/Report/ReportParserBase.php (revision da83637ca6236094f5a00d6e54530cd25ac7aa0e) 
1<?php
2/**
3 * webtrees: online genealogy
4 * Copyright (C) 2018 webtrees development team
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16namespace Fisharebest\Webtrees\Report;
17
18use Fisharebest\Webtrees\Tree;
19
20/**
21 * Class ReportParserBase
22 */
23class ReportParserBase
24{
25    /** @var resource The XML parser */
26    protected $xml_parser;
27
28    /** @var string Text contents of tags */
29    protected $text = '';
30
31    /**
32     * Create a parser for a report
33     *
34     * @param string $report The XML filename
35     * @param ReportBase $report_root
36     * @param string[][] $vars
37     * @param Tree $tree
38     */
39    public function __construct($report, ReportBase $report_root, $vars, Tree $tree)
40    {
41        $this->xml_parser = xml_parser_create();
42        xml_parser_set_option($this->xml_parser, XML_OPTION_CASE_FOLDING, false);
43        xml_set_element_handler($this->xml_parser, [
44            $this,
45            'startElement',
46        ], [
47            $this,
48            'endElement',
49        ]);
50        xml_set_character_data_handler($this->xml_parser, [
51            $this,
52            'characterData',
53        ]);
54
55        $fp = fopen($report, 'r');
56        while (($data = fread($fp, 4096))) {
57            if (!xml_parse($this->xml_parser, $data, feof($fp))) {
58                throw new \DomainException(sprintf(
59                    'XML error: %s at line %d',
60                    xml_error_string(xml_get_error_code($this->xml_parser)),
61                    xml_get_current_line_number($this->xml_parser)
62                ));
63            }
64        }
65
66        xml_parser_free($this->xml_parser);
67    }
68
69    /**
70     * XML handler for an opening (or self-closing) tag.
71     *
72     * @param resource $parser The resource handler for the xml parser
73     * @param string   $name   The name of the xml element parsed
74     * @param string[] $attrs  An array of key value pairs for the attributes
75     */
76    protected function startElement($parser, $name, $attrs)
77    {
78        $method = $name . 'StartHandler';
79        if (method_exists($this, $method)) {
80            $this->$method($attrs);
81        }
82    }
83
84    /**
85     * XML handler for a closing tag.
86     *
87     * @param resource $parser the resource handler for the xml parser
88     * @param string   $name   the name of the xml element parsed
89     */
90    protected function endElement($parser, $name)
91    {
92        $method = $name . 'EndHandler';
93        if (method_exists($this, $method)) {
94            $this->$method();
95        }
96    }
97
98    /**
99     * XML handler for character data.
100     *
101     * @param resource $parser The resource handler for the xml parser
102     * @param string   $data   The name of the xml element parsed
103     */
104    protected function characterData($parser, $data)
105    {
106        $this->text .= $data;
107    }
108}
109