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1 | <?php |
2 | |
3 | /** |
4 | * Console command: deduplicate lines in a sorted file. |
5 | * |
6 | * Needed for the Windows version of the alphabetical browse database generator, |
7 | * since Windows sort does not support deduplication. Assumes presorted input. |
8 | * |
9 | * PHP version 8 |
10 | * |
11 | * Copyright (C) Villanova University 2020. |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify |
14 | * it under the terms of the GNU General Public License version 2, |
15 | * as published by the Free Software Foundation. |
16 | * |
17 | * This program is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU General Public License for more details. |
21 | * |
22 | * You should have received a copy of the GNU General Public License |
23 | * along with this program; if not, write to the Free Software |
24 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
25 | * |
26 | * @category VuFind |
27 | * @package Console |
28 | * @author Demian Katz <demian.katz@villanova.edu> |
29 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
30 | * @link https://vufind.org/wiki/development Wiki |
31 | */ |
32 | |
33 | namespace VuFindConsole\Command\Util; |
34 | |
35 | use Symfony\Component\Console\Attribute\AsCommand; |
36 | use Symfony\Component\Console\Command\Command; |
37 | use Symfony\Component\Console\Input\InputArgument; |
38 | use Symfony\Component\Console\Input\InputInterface; |
39 | use Symfony\Component\Console\Output\OutputInterface; |
40 | use Symfony\Component\Console\Question\Question; |
41 | |
42 | /** |
43 | * Console command: deduplicate lines in a sorted file. |
44 | * |
45 | * @category VuFind |
46 | * @package Console |
47 | * @author Demian Katz <demian.katz@villanova.edu> |
48 | * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License |
49 | * @link https://vufind.org/wiki/development Wiki |
50 | */ |
51 | #[AsCommand( |
52 | name: 'util/dedupe', |
53 | description: 'Tool for deduplicating lines in a sorted file' |
54 | )] |
55 | class DedupeCommand extends Command |
56 | { |
57 | /** |
58 | * Configure the command. |
59 | * |
60 | * @return void |
61 | */ |
62 | protected function configure() |
63 | { |
64 | $this |
65 | ->setHelp('Deduplicates lines in a sorted file.') |
66 | ->addArgument( |
67 | 'input', |
68 | InputArgument::OPTIONAL, |
69 | 'the file to deduplicate (omit for interactive prompt).' |
70 | )->addArgument( |
71 | 'output', |
72 | InputArgument::OPTIONAL, |
73 | 'the output file (omit for interactive prompt).' |
74 | ); |
75 | } |
76 | |
77 | /** |
78 | * Fetch a single line of input from the user. |
79 | * |
80 | * @param InputInterface $input Input object |
81 | * @param OutputInterface $output Output object |
82 | * @param string $prompt Prompt to display to the user. |
83 | * |
84 | * @return string User-entered response. |
85 | */ |
86 | protected function getInput( |
87 | InputInterface $input, |
88 | OutputInterface $output, |
89 | string $prompt |
90 | ): string { |
91 | $question = new Question($prompt, ''); |
92 | return $this->getHelper('question')->ask($input, $output, $question); |
93 | } |
94 | |
95 | /** |
96 | * Open a file for writing. |
97 | * |
98 | * @param string $filename File to open |
99 | * |
100 | * @return resource |
101 | */ |
102 | protected function openOutputFile($filename) |
103 | { |
104 | return @fopen($filename, 'w'); |
105 | } |
106 | |
107 | /** |
108 | * Write a line to an output file. |
109 | * |
110 | * @param resource $handle File handle |
111 | * @param string $text Text to write |
112 | * |
113 | * @return void |
114 | */ |
115 | protected function writeToOutputFile($handle, $text) |
116 | { |
117 | fwrite($handle, $text); |
118 | } |
119 | |
120 | /** |
121 | * Close a file handle. |
122 | * |
123 | * @param resource $handle Handle from openOutputFile() |
124 | * |
125 | * @return void |
126 | */ |
127 | protected function closeOutputFile($handle) |
128 | { |
129 | fclose($handle); |
130 | } |
131 | |
132 | /** |
133 | * Run the command. |
134 | * |
135 | * @param InputInterface $input Input object |
136 | * @param OutputInterface $output Output object |
137 | * |
138 | * @return int 0 for success |
139 | */ |
140 | protected function execute(InputInterface $input, OutputInterface $output) |
141 | { |
142 | $infile = $input->getArgument('input'); |
143 | if (empty($infile)) { |
144 | $inprompt = 'Please specify an input file: '; |
145 | $infile = $this->getInput($input, $output, $inprompt); |
146 | } |
147 | $inHandle = @fopen($infile, 'r'); |
148 | if (!$inHandle) { |
149 | $output->writeln('Could not open input file: ' . $infile); |
150 | return 1; |
151 | } |
152 | $outfile = $input->getArgument('output'); |
153 | if (empty($outfile)) { |
154 | $outprompt = 'Please specify an output file: '; |
155 | $outfile = $this->getInput($input, $output, $outprompt); |
156 | } |
157 | $outHandle = $this->openOutputFile($outfile); |
158 | if (!$outHandle) { |
159 | $output->writeln('Could not open output file: ' . $outfile); |
160 | return 1; |
161 | } |
162 | |
163 | $last = ''; |
164 | while ($tmp = fgets($inHandle)) { |
165 | if ($tmp != $last) { |
166 | $this->writeToOutputFile($outHandle, $tmp); |
167 | } |
168 | $last = $tmp; |
169 | } |
170 | |
171 | fclose($inHandle); |
172 | $this->closeOutputFile($outHandle); |
173 | |
174 | return 0; |
175 | } |
176 | } |