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
15    protected $config = array();
16
17    /**
18     * Parser constructor.
19     *
20     * parses the given configuration lines
21     *
22     * @param $lines
23     */
24    public function __construct($lines)
25    {
26        /** @var \helper_plugin_struct_config $helper */
27        $helper = plugin_load('helper', 'struct_config');
28        $this->config = array(
29            'limit' => 0,
30            'dynfilters' => false,
31            'summarize' => false,
32            'rownumbers' => false,
33            'sepbyheaders' => false,
34            'target' => '',
35            'align' => array(),
36            'headers' => array(),
37            'cols' => array(),
38            'widths' => array(),
39            'filter' => array(),
40            'schemas' => array(),
41            'sort' => array(),
42            'csv' => true,
43        );
44        // parse info
45        foreach ($lines as $line) {
46            list($key, $val) = $this->splitLine($line);
47            if (!$key) continue;
48
49            $logic = 'OR';
50            // handle line commands (we allow various aliases here)
51            switch ($key) {
52                case 'from':
53                case 'schema':
54                case 'tables':
55                    $this->config['schemas'] = array_merge($this->config['schemas'], $this->parseSchema($val));
56                    break;
57                case 'select':
58                case 'cols':
59                case 'field':
60                case 'col':
61                    $this->config['cols'] = $this->parseValues($val);
62                    break;
63                case 'sepbyheaders':
64                    $this->config['sepbyheaders'] = (bool) $val;
65                    break;
66                case 'head':
67                case 'header':
68                case 'headers':
69                    $this->config['headers'] = $this->parseValues($val);
70                    break;
71                case 'align':
72                    $this->config['align'] = $this->parseAlignments($val);
73                    break;
74                case 'width':
75                case 'widths':
76                    $this->config['widths'] = $this->parseWidths($val);
77                    break;
78                case 'min':
79                    $this->config['min'] = abs((int) $val);
80                    break;
81                case 'limit':
82                case 'max':
83                    $this->config['limit'] = abs((int) $val);
84                    break;
85                case 'order':
86                case 'sort':
87                    $sorts = $this->parseValues($val);
88                    $sorts = array_map(array($helper, 'parseSort'), $sorts);
89                    $this->config['sort'] = array_merge($this->config['sort'], $sorts);
90                    break;
91                case 'where':
92                case 'filter':
93                case 'filterand': // phpcs:ignore PSR2.ControlStructures.SwitchDeclaration.TerminatingComment
94                    /** @noinspection PhpMissingBreakStatementInspection */
95                case 'and': // phpcs:ignore PSR2.ControlStructures.SwitchDeclaration.TerminatingComment
96                    $logic = 'AND';
97                case 'filteror':
98                case 'or':
99                    $flt = $helper->parseFilterLine($logic, $val);
100                    if ($flt) {
101                        $this->config['filter'][] = $flt;
102                    }
103                    break;
104                case 'dynfilters':
105                    $this->config['dynfilters'] = (bool) $val;
106                    break;
107                case 'rownumbers':
108                    $this->config['rownumbers'] = (bool) $val;
109                    break;
110                case 'summarize':
111                    $this->config['summarize'] = (bool) $val;
112                    break;
113                case 'csv':
114                    $this->config['csv'] = (bool) $val;
115                    break;
116                case 'target':
117                case 'page':
118                    $this->config['target'] = cleanID($val);
119                    break;
120                default:
121                    $data = array('config' => &$this->config, 'key' => $key, 'val' => $val);
122                    $ev = new \Doku_Event('PLUGIN_STRUCT_CONFIGPARSER_UNKNOWNKEY', $data);
123                    if ($ev->advise_before()) {
124                        throw new StructException("unknown option '%s'", hsc($key));
125                    }
126                    $ev->advise_after();
127            }
128        }
129
130        // fill up headers - a NULL signifies that the column label is wanted
131        $this->config['headers'] = (array) $this->config['headers'];
132        $cnth = count($this->config['headers']);
133        $cntf = count($this->config['cols']);
134        for ($i = $cnth; $i < $cntf; $i++) {
135            $this->config['headers'][] = null;
136        }
137        // fill up alignments
138        $cnta = count($this->config['align']);
139        for ($i = $cnta; $i < $cntf; $i++) {
140            $this->config['align'][] = null;
141        }
142    }
143
144    /**
145     * Get the parsed configuration
146     *
147     * @return array
148     */
149    public function getConfig()
150    {
151        return $this->config;
152    }
153
154    /**
155     * Splits the given line into key and value
156     *
157     * @param $line
158     * @return bool|array returns false for empty lines
159     */
160    protected function splitLine($line)
161    {
162        // ignore comments
163        $line = preg_replace('/(?<![&\\\\])#.*$/', '', $line);
164        $line = str_replace('\\#', '#', $line);
165        $line = trim($line);
166        if (empty($line)) return false;
167
168        $line = preg_split('/\s*:\s*/', $line, 2);
169        $line[0] = strtolower($line[0]);
170
171        return $line;
172    }
173
174    /**
175     * parses schema config and aliases
176     *
177     * @param $val
178     * @return array
179     */
180    protected function parseSchema($val)
181    {
182        $schemas = array();
183        $parts = explode(',', $val);
184        foreach ($parts as $part) {
185            @list($table, $alias) = explode(' ', trim($part));
186            $table = trim($table);
187            $alias = trim($alias);
188            if (!$table) continue;
189
190            $schemas[] = array($table, $alias,);
191        }
192        return $schemas;
193    }
194
195    /**
196     * Parse alignment data
197     *
198     * @param string $val
199     * @return string[]
200     */
201    protected function parseAlignments($val)
202    {
203        $cols = explode(',', $val);
204        $data = array();
205        foreach ($cols as $col) {
206            $col = trim(strtolower($col));
207            if ($col[0] == 'c') {
208                $align = 'center';
209            } elseif ($col[0] == 'r') {
210                $align = 'right';
211            } elseif ($col[0] == 'l') {
212                $align = 'left';
213            } else {
214                $align = null;
215            }
216            $data[] = $align;
217        }
218
219        return $data;
220    }
221
222    /**
223     * Parse width data
224     *
225     * @param $val
226     * @return array
227     */
228    protected function parseWidths($val)
229    {
230        $vals = explode(',', $val);
231        $vals = array_map('trim', $vals);
232        $len = count($vals);
233        for ($i = 0; $i < $len; $i++) {
234            $val = trim(strtolower($vals[$i]));
235
236            if (preg_match('/^\d+.?(\d+)?(px|em|ex|ch|rem|%|in|cm|mm|q|pt|pc)$/', $val)) {
237                // proper CSS unit?
238                $vals[$i] = $val;
239            } elseif (preg_match('/^\d+$/', $val)) {
240                // decimal only?
241                $vals[$i] = $val . 'px';
242            } else {
243                // invalid
244                $vals[$i] = '';
245            }
246        }
247        return $vals;
248    }
249
250    /**
251     * Split values at the commas,
252     * - Wrap with quotes to escape comma, quotes escaped by two quotes
253     * - Within quotes spaces are stored.
254     *
255     * @param string $line
256     * @return array
257     */
258    protected function parseValues($line)
259    {
260        $values = array();
261        $inQuote = false;
262        $escapedQuote = false;
263        $value = '';
264        $len = strlen($line);
265        for ($i = 0; $i < $len; $i++) {
266            if ($line[$i] == '"') {
267                if ($inQuote) {
268                    if ($escapedQuote) {
269                        $value .= '"';
270                        $escapedQuote = false;
271                        continue;
272                    }
273                    if ($line[$i + 1] == '"') {
274                        $escapedQuote = true;
275                        continue;
276                    }
277                    array_push($values, $value);
278                    $inQuote = false;
279                    $value = '';
280                    continue;
281                } else {
282                    $inQuote = true;
283                    $value = ''; //don't store stuff before the opening quote
284                    continue;
285                }
286            } elseif ($line[$i] == ',') {
287                if ($inQuote) {
288                    $value .= ',';
289                    continue;
290                } else {
291                    if (strlen($value) < 1) {
292                        continue;
293                    }
294                    array_push($values, trim($value));
295                    $value = '';
296                    continue;
297                }
298            }
299            $value .= $line[$i];
300        }
301        if (strlen($value) > 0) {
302            array_push($values, trim($value));
303        }
304        return $values;
305    }
306}
307