Source for file dftk_output_oneshot.php
Documentation is available at dftk_output_oneshot.php
1 <?php
2 /*
3
4 Copyright (c)2003 DuckCorp(tm) and RtpNet(tm)
5
6
7
8 This file is part of DFTK.
9
10 DFTK is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 DFTK is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with DFTK; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25
26 /**
27 * @package dftk
28 * @author Duck <duck@DuckCorp.org>
29 * @author Rtp <rtp@rtp-net.org>
30 * @copyright Copyright (c)2003 DuckCorp(tm) and RtpNet(tm)
31 * @license http://www.gnu.org/licenses/gpl.html GNU General Public License
32 * @version 0.4.0
33 */
34
35
36 /**
37 * DFTK Stdout Output Class
38 *
39 * @package dftk
40 * @subpackage dftk-output
41 * @author Duck <duck@DuckCorp.org>
42 *
43 * @access public
44 */
45 class DftkOutputOneshot extends DftkOutput
46 {
47 /**
48 * Filename for old output backup
49 *
50 * @access private
51 * @var string
52 */
53 var $_filename;
54
55 /**
56 * Output object
57 *
58 * @access private
59 * @var object DftkOutput
60 */
61 var $_output;
62
63 /**
64 * Constructor
65 *
66 * @access public
67 * @param object DftkDaTraceManager &$tracemgr Language Manager
68 * @param string $filename Log file name
69 * @param object DftkOutput $output Output object
70 */
71 function DftkOutputOneshot(&$tracemgr, $filename, &$output)
72 {
73 DftkOutput::DftkOutput(&$tracemgr);
74
75 $this->_filename = $filename;
76 $this->_output =& $output;
77
78 register_shutdown_function(array(&$this, "_DftkOutputOneshot"));
79 }
80
81 /**
82 * Destructor
83 *
84 * @access private
85 */
86 function _DftkOutputOneshot()
87 {
88 }
89
90 /**
91 * Flush output
92 *
93 * Result :
94 * + 'output_changed' : true if output has changed since last call
95 *
96 * @access public
97 * @return object DftkDaTrace $r Trace
98 */
99 function &flush_output()
100 {
101 $r =& $this->_tracemgr->create_trace();
102
103 if (file_exists($this->_filename))
104 {
105 if (!function_exists('md5_file'))
106 $old_md5 = md5(implode("", file($this->_filename)));
107 else
108 $old_md5 = md5_file($this->_filename);
109 }
110 else
111 $old_md5="";
112
113 $content = $this->_header.$this->_content.$this->_footer;
114 $md5 = md5($content);
115
116 if ($md5 != $old_md5)
117 {
118 $r2 =& $this->_save_output();
119 $r->merge_traces($r2);
120
121 if ($content)
122 {
123 $this->_output->set_header($this->_header);
124 $this->_output->clear_content();
125 $this->_output->add_content($this->_content);
126 $this->_output->set_footer($this->_footer);
127
128 $this->_output->flush_output();
129 }
130
131 $r->set_result('output_changed', true);
132 }
133 else
134 $r->set_result('output_changed', false);
135
136 $r2 =& DftkOutput::flush_output();
137 $r->merge_traces($r2);
138
139 return $r;
140 }
141
142 /**
143 * Save output
144 *
145 * @access private
146 * @return object DftkDaTrace $r Trace
147 */
148 function &_save_output()
149 {
150 $r =& $this->_tracemgr->create_trace();
151
152 $fp = fopen($this->_filename, "w");
153 if (!$fp)
154 $r->add_event('dftk-output_ioerr');
155
156 if (!$r->has_error())
157 {
158 if (!fwrite($fp, $this->_header.$this->_content.$this->_footer))
159 $r->add_event('dftk-output_ioerr');
160
161 if (!$r->has_error())
162 {
163 if(!fclose($fp))
164 $r->add_event('dftk-output_ioerr');
165 }
166 }
167
168 return $r;
169 }
170 }
171
172 ?>
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