xref: /plugin/struct/meta/ConfigParser.php (revision 7b240ca8f5700062747de72114086e794669e39b) 
1<?php
2
3namespace dokuwiki\plugin\struct\meta;
4
5/**
6 * Class ConfigParser
7 *
8 * Utilities to parse the configuration syntax into an array
9 *
10 * @package dokuwiki\plugin\struct\meta
11 */
12class ConfigParser {
13
14    protected $config = array();
15
16    /**
17     * Parser constructor.
18     *
19     * parses the given configuration lines
20     *
21     * @param $lines
22     */
23    public function __construct($lines) {
24        /** @var \helper_plugin_struct_config $helper */
25        $helper = plugin_load('helper', 'struct_config');
26        $this->config = array(
27            'limit' => 0,
28            'dynfilters' => false,
29            'summarize' => false,
30            'rownumbers' => false,
31            'sepbyheaders' => false,
32            'headers' => array(),
33            'widths' => array(),
34            'filter' => array(),
35            'schemas' => array(),
36            'sort' => array(),
37            'csv' => true,
38        );
39        // parse info
40        foreach($lines as $line) {
41            list($key, $val) = $this->splitLine($line);
42            if(!$key) continue;
43
44            $logic = 'OR';
45            // handle line commands (we allow various aliases here)
46            switch($key) {
47                case 'from':
48                case 'schema':
49                case 'tables':
50                    $this->config['schemas'] = array_merge($this->config['schemas'], $this->parseSchema($val));
51                    break;
52                case 'select':
53                case 'cols':
54                case 'field':
55                case 'col':
56                    $this->config['cols'] = $this->parseValues($val);
57                    break;
58                case 'head':
59                case 'header':
60                case 'headers':
61                    $this->config['headers'] = $this->parseValues($val);
62                    break;
63                case 'align':
64                    $this->config['align'] = $this->parseAlignments($val);
65                    break;
66                case 'width':
67                case 'widths':
68                    $this->config['widths'] = $this->parseWidths($val);
69                    break;
70                case 'min':
71                    $this->config['min'] = abs((int) $val);
72                    break;
73                case 'limit':
74                case 'max':
75                    $this->config['limit'] = abs((int) $val);
76                    break;
77                case 'order':
78                case 'sort':
79                    $sorts = $this->parseValues($val);
80                    $sorts = array_map(array($helper, 'parseSort'), $sorts);
81                    $this->config['sort'] = array_merge($this->config['sort'], $sorts);
82                    break;
83                case 'where':
84                case 'filter':
85                case 'filterand':
86                    /** @noinspection PhpMissingBreakStatementInspection */
87                case 'and':
88                    $logic = 'AND';
89                case 'filteror':
90                case 'or':
91                    $flt = $helper->parseFilterLine($logic, $val);
92                    if($flt) {
93                        $this->config['filter'][] = $flt;
94                    }
95                    break;
96                case 'dynfilters':
97                    $this->config['dynfilters'] = (bool) $val;
98                    break;
99                case 'rownumbers':
100                    $this->config['rownumbers'] = (bool) $val;
101                    break;
102                case 'summarize':
103                    $this->config['summarize'] = (bool) $val;
104                    break;
105                case 'csv':
106                    $this->config['csv'] = (bool) $val;
107                    break;
108                default:
109                    throw new StructException("unknown option '%s'", hsc($key));
110            }
111        }
112
113        // fill up headers - a NULL signifies that the column label is wanted
114        $this->config['headers'] = (array) $this->config['headers'];
115        $cnth = count($this->config['headers']);
116        $cntf = count($this->config['cols']);
117        for($i = $cnth; $i < $cntf; $i++) {
118            $this->config['headers'][] = null;
119        }
120    }
121
122    /**
123     * Get the parsed configuration
124     *
125     * @return array
126     */
127    public function getConfig() {
128        return $this->config;
129    }
130
131    /**
132     * Splits the given line into key and value
133     *
134     * @param $line
135     * @return bool|array returns false for empty lines
136     */
137    protected function splitLine($line) {
138        // ignore comments
139        $line = preg_replace('/(?<![&\\\\])#.*$/', '', $line);
140        $line = str_replace('\\#', '#', $line);
141        $line = trim($line);
142        if(empty($line)) return false;
143
144        $line = preg_split('/\s*:\s*/', $line, 2);
145        $line[0] = strtolower($line[0]);
146
147        return $line;
148    }
149
150    /**
151     * parses schema config and aliases
152     *
153     * @param $val
154     * @return array
155     */
156    protected function parseSchema($val) {
157        $schemas = array();
158        $parts = explode(',', $val);
159        foreach($parts as $part) {
160            list($table, $alias) = explode(' ', trim($part));
161            $table = trim($table);
162            $alias = trim($alias);
163            if(!$table) continue;
164
165            $schemas[] = array($table, $alias,);
166        }
167        return $schemas;
168    }
169
170    /**
171     * Parse alignment data
172     *
173     * @param string $val
174     * @return string[]
175     */
176    protected function parseAlignments($val) {
177        $cols = explode(',', $val);
178        $data = array();
179        foreach($cols as $col) {
180            $col = trim(strtolower($col));
181            if($col[0] == 'c') {
182                $align = 'center';
183            } elseif($col[0] == 'r') {
184                $align = 'right';
185            } else {
186                $align = 'left';
187            }
188            $data[] = $align;
189        }
190
191        return $data;
192    }
193
194    /**
195     * Parse width data
196     *
197     * @param $val
198     * @return array
199     */
200    protected function parseWidths($val) {
201        $vals = explode(',', $val);
202        $vals = array_map('trim', $vals);
203        $len = count($vals);
204        for($i = 0; $i < $len; $i++) {
205            $val = trim(strtolower($vals[$i]));
206
207            if(preg_match('/^\d+.?(\d+)?(px|em|ex|ch|rem|%|in|cm|mm|q|pt|pc)$/', $val)) {
208                // proper CSS unit?
209                $vals[$i] = $val;
210            } else if(preg_match('/^\d+$/', $val)) {
211                // decimal only?
212                $vals[$i] = $val . 'px';
213            } else {
214                // invalid
215                $vals[$i] = '';
216            }
217        }
218        return $vals;
219    }
220
221    /**
222     * Split values at the commas,
223     * - Wrap with quotes to escape comma, quotes escaped by two quotes
224     * - Within quotes spaces are stored.
225     *
226     * @param string $line
227     * @return array
228     */
229    protected function parseValues($line) {
230        $values = array();
231        $inQuote = false;
232        $escapedQuote = false;
233        $value = '';
234        $len = strlen($line);
235        for($i = 0; $i < $len; $i++) {
236            if($line{$i} == '"') {
237                if($inQuote) {
238                    if($escapedQuote) {
239                        $value .= '"';
240                        $escapedQuote = false;
241                        continue;
242                    }
243                    if($line{$i + 1} == '"') {
244                        $escapedQuote = true;
245                        continue;
246                    }
247                    array_push($values, $value);
248                    $inQuote = false;
249                    $value = '';
250                    continue;
251                } else {
252                    $inQuote = true;
253                    $value = ''; //don't store stuff before the opening quote
254                    continue;
255                }
256            } else if($line{$i} == ',') {
257                if($inQuote) {
258                    $value .= ',';
259                    continue;
260                } else {
261                    if(strlen($value) < 1) {
262                        continue;
263                    }
264                    array_push($values, trim($value));
265                    $value = '';
266                    continue;
267                }
268            }
269            $value .= $line{$i};
270        }
271        if(strlen($value) > 0) {
272            array_push($values, trim($value));
273        }
274        return $values;
275    }
276
277}
278