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<?php
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// $Id: include.php 971 2009-04-20 15:14:41Z Ruebenwurzel $
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/*
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    show_menu2: show_menu replacement for Website Baker 
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    Copyright (C) 2006-2009, Brodie Thiesfield
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    This program is free software; you can redistribute it and/or
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    modify it under the terms of the GNU General Public License
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    as published by the Free Software Foundation; either version 2
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    of the License, or (at your option) any later version.
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    This program is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
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    along with this program; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  
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    02110-1301, USA.
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    ***********************************************
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    ** Version 4.8: see README for documentation **
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    ***********************************************
27
*/
28

    
29
define('SM2_ROOT',       -1000);
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define('SM2_CURR',       -2000);
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define('SM2_ALLMENU',       -1);
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define('SM2_START',       1000);
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define('SM2_MAX',         2000);
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define('SM2_ALL',       0x0001); // bit 0 (group 1) (Note: also used for max level!)
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define('SM2_TRIM',      0x0002); // bit 1 (group 1)
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define('SM2_CRUMB',     0x0004); // bit 2 (group 1)
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define('SM2_SIBLING',   0x0008); // bit 3 (group 1)
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define('SM2_NUMCLASS',  0x0010); // bit 4
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define('SM2_ALLINFO',   0x0020); // bit 5
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define('SM2_NOCACHE',   0x0040); // bit 6
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define('SM2_PRETTY',    0x0080); // bit 7
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define('SM2_ESCAPE',    0x0100); // bit 8
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define('SM2_NOESCAPE',       0); // NOOP, unnecessary with WB 2.6.7+
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define('SM2_BUFFER',    0x0200); // bit 9
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define('SM2_CURRTREE',  0x0400); // bit 10
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define('_SM2_GROUP_1',  0x000F); // exactly one flag from group 1 is required
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49

    
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// Implement support for page_menu and show_menu using show_menu2. If you remove
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// the comments characters from the beginning of the following include, all menu
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// functions in Website Baker will be implemented using show_menu2. While it is
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// commented out, the original WB functions will be used.
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//include('legacy.php');
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// This class is the default menu formatter for sm2. If desired, you can 
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// create your own formatter class and pass the object into show_menu2 
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// as $aItemFormat.
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define('SM2_CONDITIONAL','if\s*\(([^\)]+)\)\s*{([^}]*)}\s*(?:else\s*{([^}]*)}\s*)?');
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define('SM2_COND_TERM','\s*(\w+)\s*(<|<=|==|=|=>|>|!=)\s*([\w\-]+)\s*');
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class SM2_Formatter
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{
63
    var $output;
64
    var $flags;
65
    var $itemOpen;
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    var $itemClose;
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    var $menuOpen;
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    var $menuClose;
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    var $topItemOpen;
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    var $topMenuOpen;
71
    
72
    var $isFirst;
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    var $page;
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    var $url;
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    var $currSib;
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    var $sibCount;
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    var $currClass;
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    var $prettyLevel;
79

    
80
    // output the data
81
    function output($aString) {
82
        if ($this->flags & SM2_BUFFER) {
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            $this->output .= $aString;
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        }
85
        else {
86
            echo $aString;
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        }
88
    }
89
    
90
    // set the default values for all of our formatting items
91
    function set($aFlags, $aItemOpen, $aItemClose, $aMenuOpen, $aMenuClose, $aTopItemOpen, $aTopMenuOpen) {
92
        $this->flags        = $aFlags;
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        $this->itemOpen     = is_string($aItemOpen)    ? $aItemOpen    : '[li][a][menu_title]</a>';
94
        $this->itemClose    = is_string($aItemClose)   ? $aItemClose   : '</li>';
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        $this->menuOpen     = is_string($aMenuOpen)    ? $aMenuOpen    : '[ul]';
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        $this->menuClose    = is_string($aMenuClose)   ? $aMenuClose   : '</ul>';
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        $this->topItemOpen  = is_string($aTopItemOpen) ? $aTopItemOpen : $this->itemOpen;
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        $this->topMenuOpen  = is_string($aTopMenuOpen) ? $aTopMenuOpen : $this->menuOpen;
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    }
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101
    // initialize the state of the formatter before anything is output
102
    function initialize() {
103
        $this->output = '';
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        $this->prettyLevel = 0;
105
        if ($this->flags & SM2_PRETTY) {
106
            $this->output("\n<!-- show_menu2 -->");
107
        }
108
    }
109

    
110
    // start a menu     
111
    function startList(&$aPage, &$aUrl) {
112
        $currClass = '';
113
        $currItem = $this->menuOpen;
114
        
115
        // use the top level menu open if this is the first menu
116
        if ($this->topMenuOpen) {
117
            $currItem = $this->topMenuOpen;
118
            $currClass .= ' menu-top';
119
            $this->topMenuOpen = false;
120
        }
121
        
122
        // add the numbered menu class only if requested
123
        if (($this->flags & SM2_NUMCLASS) == SM2_NUMCLASS) {
124
            $currClass .= ' menu-'.$aPage['level'];
125
        }
126
        
127
        $this->prettyLevel += 1;
128
        
129
        // replace all keywords in the output
130
        if ($this->flags & SM2_PRETTY) {
131
            $this->output("\n".str_repeat(' ',$this->prettyLevel).
132
                $this->format($aPage, $aUrl, $currItem, $currClass));
133
        }
134
        else {
135
            $this->output($this->format($aPage, $aUrl, $currItem, $currClass));
136
        }
137
        
138
        $this->prettyLevel += 3;
139
    }
140
    
141
    // start an item within the menu
142
    function startItem(&$aPage, &$aUrl, $aCurrSib, $aSibCount) {
143
        // generate our class list
144
        $currClass = '';
145
        if (($this->flags & SM2_NUMCLASS) == SM2_NUMCLASS) {
146
            $currClass .= ' menu-'.$aPage['level'];
147
        }
148
        if (array_key_exists('sm2_has_child', $aPage)) {
149
            // not set if false, so existence = true
150
            $currClass .= ' menu-expand';
151
        }
152
        if (array_key_exists('sm2_is_curr', $aPage)) { 
153
            $currClass .= ' menu-current';
154
        }
155
        elseif (array_key_exists('sm2_is_parent', $aPage)) { 
156
            // not set if false, so existence = true
157
            $currClass .= ' menu-parent';
158
        }
159
        elseif (array_key_exists('sm2_is_sibling', $aPage)) {
160
            // not set if false, so existence = true
161
            $currClass .= ' menu-sibling';
162
        }
163
        elseif (array_key_exists('sm2_child_level',$aPage)) {
164
            // not set if not a child
165
            $currClass .= ' menu-child';
166
            if (($this->flags & SM2_NUMCLASS) == SM2_NUMCLASS) {
167
                $currClass .= ' menu-child-'.($aPage['sm2_child_level']-1);
168
            }
169
        }
170
        if ($aCurrSib == 1) {
171
            $currClass .= ' menu-first';
172
        }
173
        if ($aCurrSib == $aSibCount) {
174
            $currClass .= ' menu-last';
175
        }
176

    
177
        // use the top level item if this is the first item
178
        $currItem = $this->itemOpen;
179
        if ($this->topItemOpen) {
180
            $currItem = $this->topItemOpen;
181
            $this->topItemOpen = false;
182
        }
183

    
184
        // replace all keywords in the output
185
        if ($this->flags & SM2_PRETTY) {
186
            $this->output("\n".str_repeat(' ',$this->prettyLevel));
187
        }
188
        $this->output($this->format($aPage, $aUrl, $currItem, $currClass, $aCurrSib, $aSibCount));
189
    }
190
    
191
    // find and replace all keywords, setting the state variables first
192
    function format(&$aPage, &$aUrl, &$aCurrItem, &$aCurrClass, 
193
        $aCurrSib = 0, $aSibCount = 0) 
194
    {
195
        $this->page      = &$aPage;
196
        $this->url       = &$aUrl;
197
        $this->currClass = trim($aCurrClass);
198
        $this->currSib   = $aCurrSib;
199
        $this->sibCount  = $aSibCount;
200
        
201
        $item = $this->format2($aCurrItem);
202
        
203
        unset($this->page);
204
        unset($this->url);
205
        unset($this->currClass);
206
        
207
        return $item;
208
    }
209
    
210
    // find and replace all keywords
211
    function format2(&$aCurrItem) {
212
        if (!is_string($aCurrItem)) return '';
213
        return preg_replace(
214
            '@\[('.
215
                'a|ac|/a|li|/li|ul|/ul|menu_title|page_title|url|target|page_id|'.
216
                'parent|level|sib|sibCount|class|description|keywords|'.
217
                SM2_CONDITIONAL.
218
            ')\]@e', 
219
            '$this->replace("\1")', $aCurrItem);
220
    }
221
    
222
    // replace the keywords
223
    function replace($aMatch) {
224
        switch ($aMatch) {
225
        case 'a':
226
            return '<a href="'.$this->url.'" target="'.$this->page['target'].'">';
227
        case 'ac':
228
            return '<a href="'.$this->url.'" target="'.$this->page['target'].'" class="'.$this->currClass.'">';
229
        case '/a':
230
            return '</a>';
231
        case 'li':
232
            return '<li class="'.$this->currClass.'">';
233
        case '/li':
234
            return '</li>';
235
        case 'ul':
236
            return '<ul class="'.$this->currClass.'">';
237
        case '/ul':
238
            return '</ul>';
239
        case 'url':
240
            return $this->url;
241
        case 'sib':
242
            return $this->currSib;
243
        case 'sibCount':
244
            return $this->sibCount;
245
        case 'class':
246
            return $this->currClass;
247
        default:
248
            if (array_key_exists($aMatch, $this->page)) {
249
                if ($this->flags & SM2_ESCAPE) {
250
                    return htmlspecialchars($this->page[$aMatch], ENT_QUOTES);
251
                }
252
                else {
253
                    return $this->page[$aMatch];
254
                }
255
            }
256
            if (preg_match('/'.SM2_CONDITIONAL.'/', $aMatch, $rgMatches)) {
257
                return $this->replaceIf($rgMatches[1], $rgMatches[2], $rgMatches[3]);
258
            }
259
        }
260
        return "[$aMatch=UNKNOWN]";
261
    }
262
    
263
    // conditional replacement
264
    function replaceIf(&$aExpression, &$aIfValue, &$aElseValue) {
265
        // evaluate all of the tests in the conditional (we don't do short-circuit
266
        // evaluation) and replace the string test with the boolean result
267
        $rgTests = preg_split('/(\|\||\&\&)/', $aExpression, -1, PREG_SPLIT_DELIM_CAPTURE);
268
        for ($n = 0; $n < count($rgTests); $n += 2) {
269
            if (preg_match('/'.SM2_COND_TERM.'/', $rgTests[$n], $rgMatches)) {
270
                $rgTests[$n] = $this->ifTest($rgMatches[1], $rgMatches[2], $rgMatches[3]);
271
            }
272
            else {
273
                error_log("show_menu2 error: conditional expression is invalid!");
274
                $rgTests[$n] = false;
275
            }
276
        }
277

    
278
        // combine all test results for a final result
279
        $ok = $rgTests[0];
280
        for ($n = 1; $n+1 < count($rgTests); $n += 2) {
281
            if ($rgTests[$n] == '||') {
282
                $ok = $ok || $rgTests[$n+1];
283
            }
284
            else {
285
                $ok = $ok && $rgTests[$n+1];
286
            }
287
        }
288
        
289
        // return the formatted expression if the test succeeded
290
        return $ok ? $this->format2($aIfValue) : $this->format2($aElseValue);
291
    }
292

    
293
    // conditional test
294
    function ifTest(&$aKey, &$aOperator, &$aValue) {
295
        global $wb;
296
        
297
        // find the correct operand
298
        $operand = false;
299
        switch($aKey) {
300
        case 'class':
301
            // we need to wrap the class names in spaces so we can test for a unique
302
            // class name that will not match prefixes or suffixes. Same must be done
303
            // for the value we are testing.
304
            $operand = " $this->currClass "; 
305
            break;
306
        case 'sib':
307
            $operand = $this->currSib;
308
            if ($aValue == 'sibCount') {
309
                $aValue = $this->sibCount;
310
            }
311
            break;
312
        case 'sibCount':
313
            $operand = $this->sibCount;
314
            break;
315
        case 'level':
316
            $operand = $this->page['level'];
317
            switch ($aValue) {
318
            case 'root':    $aValue = 0; break;
319
            case 'granny':  $aValue = $wb->page['level']-2; break;
320
            case 'parent':  $aValue = $wb->page['level']-1; break;
321
            case 'current': $aValue = $wb->page['level'];   break;
322
            case 'child':   $aValue = $wb->page['level']+1; break;
323
            }
324
            if ($aValue < 0) $aValue = 0;
325
            break;
326
        case 'id':
327
            $operand = $this->page['page_id'];
328
            switch ($aValue) {
329
            case 'parent':  $aValue = $wb->page['parent'];  break;
330
            case 'current': $aValue = $wb->page['page_id']; break;
331
            }
332
            break;
333
        default:
334
            return '';
335
        }
336

    
337
        // do the test        
338
        $ok = false;
339
        switch ($aOperator) { 
340
        case '<':
341
            $ok = ($operand < $aValue); 
342
            break;
343
        case '<=':
344
            $ok = ($operand <= $aValue); 
345
            break;
346
        case '=':
347
        case '==':
348
        case '!=':
349
            if ($aKey == 'class') {
350
                $ok = strstr($operand, " $aValue ") !== FALSE;
351
            }
352
            else {
353
                $ok = ($operand == $aValue); 
354
            }
355
            if ($aOperator == '!=') {
356
                $ok = !$ok;
357
            }
358
            break;
359
        case '>=':
360
            $ok = ($operand >= $aValue); 
361
        case '>':
362
            $ok = ($operand > $aValue); 
363
        }
364
        
365
        return $ok;
366
    }
367
    
368
    // finish the current menu item
369
    function finishItem() {
370
        if ($this->flags & SM2_PRETTY) {
371
            $this->output(str_repeat(' ',$this->prettyLevel).$this->itemClose);
372
        }
373
        else {
374
            $this->output($this->itemClose);
375
        }
376
    }
377
    
378
    // finish the current menu
379
    function finishList() {
380
        $this->prettyLevel -= 3;
381
        
382
        if ($this->flags & SM2_PRETTY) {
383
            $this->output("\n".str_repeat(' ',$this->prettyLevel).$this->menuClose."\n");
384
        }
385
        else {
386
            $this->output($this->menuClose);
387
        }
388
        
389
        $this->prettyLevel -= 1;
390
    }
391
    
392
    // cleanup the state of the formatter after everything has been output
393
    function finalize() {
394
        if ($this->flags & SM2_PRETTY) {
395
            $this->output("\n");
396
        }
397
    }
398

    
399
    // return the output
400
    function getOutput() {
401
        return $this->output;
402
    }
403
};
404

    
405
function show_menu2(
406
    $aMenu          = 0,
407
    $aStart         = SM2_ROOT,
408
    $aMaxLevel      = -1999, // SM2_CURR+1
409
    $aOptions       = SM2_TRIM,
410
    $aItemOpen      = false,
411
    $aItemClose     = false,
412
    $aMenuOpen      = false,
413
    $aMenuClose     = false,
414
    $aTopItemOpen   = false,
415
    $aTopMenuOpen   = false
416
    )
417
{
418
    global $wb;
419

    
420
    // extract the flags and set $aOptions to an array
421
    $flags = 0;
422
    if (is_int($aOptions)) {
423
        $flags = $aOptions;
424
        $aOptions = array();
425
    }
426
    else if (isset($aOptions['flags'])) {
427
        $flags = $aOptions['flags'];
428
    }
429
    else {
430
        $flags = SM2_TRIM;
431
        $aOptions = array();
432
        error_log('show_menu2 error: $aOptions is invalid. No flags supplied!');
433
    }
434
    
435
    // ensure we have our group 1 flag, we don't check for the "exactly 1" part, but 
436
    // we do ensure that they provide at least one.
437
    if (0 == ($flags & _SM2_GROUP_1)) {
438
        error_log('show_menu2 error: $aOptions is invalid. No flags from group 1 supplied!');
439
        $flags |= SM2_TRIM; // default to TRIM
440
    }
441
    
442
    // search page results don't have any of the page data loaded by WB, so we load it 
443
    // ourselves using the referrer ID as the current page
444
    $CURR_PAGE_ID = defined('REFERRER_ID') ? REFERRER_ID : PAGE_ID;
445
    if (count($wb->page) == 0 && defined('REFERRER_ID') && REFERRER_ID > 0) {
446
        global $database;
447
        $sql = "SELECT * FROM ".TABLE_PREFIX."pages WHERE page_id = '".REFERRER_ID."'";
448
        $result = $database->query($sql);
449
        if ($result->numRows() == 1) {
450
            $wb->page = $result->fetchRow();
451
        }
452
        unset($result);
453
    }
454
    
455
    // fix up the menu number to default to the menu number
456
    // of the current page if no menu has been supplied
457
    if ($aMenu == 0) {
458
        $aMenu = $wb->page['menu'] == '' ? 1 : $wb->page['menu'];
459
    } 
460

    
461
    // Set some of the $wb->page[] settings to defaults if not set
462
    $pageLevel  = $wb->page['level']  == '' ? 0 : $wb->page['level'];
463
    $pageParent = $wb->page['parent'] == '' ? 0 : $wb->page['parent'];
464
    
465
    // adjust the start level and start page ID as necessary to
466
    // handle the special values that can be passed in as $aStart
467
    $aStartLevel = 0;
468
    if ($aStart < SM2_ROOT) {   // SM2_CURR+N
469
        if ($aStart == SM2_CURR) {
470
            $aStartLevel = $pageLevel;
471
            $aStart = $pageParent;
472
        }
473
        else {
474
            $aStartLevel = $pageLevel + $aStart - SM2_CURR;
475
            $aStart = $CURR_PAGE_ID; 
476
        }
477
    }
478
    elseif ($aStart < 0) {   // SM2_ROOT+N
479
        $aStartLevel = $aStart - SM2_ROOT;
480
        $aStart = 0;
481
    }
482

    
483
    // we get the menu data once and store it in a global variable. This allows 
484
    // multiple calls to show_menu2 in a single page with only a single call to 
485
    // the database. If this variable exists, then we have already retrieved all
486
    // of the information and processed it, so we don't need to do it again.
487
    if (($flags & SM2_NOCACHE) != 0
488
        || !array_key_exists('show_menu2_data', $GLOBALS) 
489
        || !array_key_exists($aMenu, $GLOBALS['show_menu2_data'])) 
490
    {
491
        global $database;
492

    
493
        // create an array of all parents of the current page. As the page_trail
494
        // doesn't include the theoretical root element 0, we add it ourselves.
495
        $rgCurrParents = split(',', '0,'.$wb->page['page_trail']);
496
        array_pop($rgCurrParents); // remove the current page
497
        $rgParent = array();
498

    
499
        // if the caller wants all menus gathered together (e.g. for a sitemap)
500
        // then we don't limit our SQL query
501
        $menuLimitSql = ' AND menu = ' .$aMenu;
502
        if ($aMenu == SM2_ALLMENU) {
503
            $menuLimitSql = '';
504
        }
505

    
506
        // we only load the description and keywords if we have been told to,
507
        // this cuts the memory load for pages that don't use them. Note that if
508
        // we haven't been told to load these fields the *FIRST TIME* show_menu2
509
        // is called (i.e. where the database is loaded) then the info won't
510
        // exist anyhow.
511
        $fields = 'parent,page_id,menu_title,page_title,link,target,level,visibility,viewing_groups';
512
        if (version_compare(WB_VERSION, '2.7', '>=')) { // WB 2.7+
513
            $fields .= ',viewing_users';
514
        }
515
        if ($flags & SM2_ALLINFO) {
516
            $fields = '*';
517
        }
518
        
519
        // get this once for performance. We really should be calling only need to
520
        // call $wb->get_group_id() but that outputs a warning notice if the 
521
        // groupid isn't set in the session, so we check it first here.
522
        $currGroup = array_key_exists('GROUP_ID', $_SESSION) ? 
523
            ','.$wb->get_group_id().',' : 'NOGROUP';
524
        
525
        // we request all matching rows from the database for the menu that we 
526
        // are about to create it is cheaper for us to get everything we need 
527
        // from the database once and create the menu from memory then make 
528
        // multiple calls to the database. 
529
        $sql = "SELECT $fields FROM ".TABLE_PREFIX.
530
               "pages WHERE $wb->extra_where_sql $menuLimitSql ".
531
               'ORDER BY level ASC, position ASC';
532
        $sql = str_replace('hidden', 'IGNOREME', $sql); // we want the hidden pages
533
        $oRowset = $database->query($sql);
534
        if (is_object($oRowset) && $oRowset->numRows() > 0) {
535
            // create an in memory array of the database data based on the item's parent. 
536
            // The array stores all elements in the correct display order.
537
            while ($page = $oRowset->fetchRow()) {
538
                // ignore all pages that the current user is not permitted to view
539
                if(version_compare(WB_VERSION, '2.7', '>=')) { // WB >= 2.7
540
                    // 1. hidden pages aren't shown unless they are on the current page
541
                    if ($page['visibility'] == 'hidden') {
542
                        $page['sm2_hide'] = true;
543
                    }
544
                    
545
                    // 2. all pages with no active sections (unless it is the top page) are ignored
546
                    else if (!$wb->page_is_active($page) && $page['link'] != $wb->default_link && !INTRO_PAGE) {
547
                        continue;
548
                    }
549

    
550
                    // 3. all pages not visible to this user (unless always visible to registered users) are ignored
551
                    else if (!$wb->page_is_visible($page) && $page['visibility'] != 'registered') {
552
                        continue;
553
                    }
554
                }
555
                else {  // WB < 2.7
556
                    // We can't do this in SQL as the viewing_groups column contains multiple 
557
                    // values which are hard to process correctly in SQL. Essentially we add the
558
                    // following limit to the SQL query above:
559
                    //  (visibility <> "private" OR $wb->get_group_id() IN viewing_groups)
560
                    if ($page['visibility'] == 'private' 
561
                        && false === strstr(",{$page['viewing_groups']},", $currGroup)) 
562
                    {
563
                        continue;
564
                    }
565
                }
566

    
567
                // ensure that we have an array entry in the table to add this to
568
                $idx = $page['parent'];
569
                if (!array_key_exists($idx, $rgParent)) {
570
                    $rgParent[$idx] = array();
571
                }
572

    
573
                // mark our current page as being on the current path
574
                if ($page['page_id'] == $CURR_PAGE_ID) {
575
                    $page['sm2_is_curr'] = true;
576
                    $page['sm2_on_curr_path'] = true;
577
                    unset($page['sm2_hide']); // don't hide the current page
578
                }
579

    
580
                // mark parents of the current page as such
581
                if (in_array($page['page_id'], $rgCurrParents)) {
582
                    $page['sm2_is_parent'] = true;
583
                    $page['sm2_on_curr_path'] = true;
584
                    unset($page['sm2_hide']); // don't hide a parent page                
585
                }
586
                
587
                // add the entry to the array                
588
                $rgParent[$idx][] = $page;
589
            }
590
        }    
591
        unset($oRowset);
592

    
593
        // mark all elements that are siblings of any element on the current path
594
        foreach ($rgCurrParents as $x) {
595
            if (array_key_exists($x, $rgParent)) {
596
                foreach (array_keys($rgParent[$x]) as $y) {
597
                    $mark =& $rgParent[$x][$y];
598
                    $mark['sm2_path_sibling'] = true;
599
                    unset($mark);
600
                }
601
            }
602
        }
603

    
604
        // mark all elements that have children and are siblings of the current page
605
        $parentId = $pageParent;
606
        foreach (array_keys($rgParent) as $x) {
607
            $childSet =& $rgParent[$x];
608
            foreach (array_keys($childSet) as $y) {
609
                $mark =& $childSet[$y];
610
                if (array_key_exists($mark['page_id'], $rgParent)) {
611
                    $mark['sm2_has_child'] = true;
612
                }
613
                if ($mark['parent'] == $parentId && $mark['page_id'] != $CURR_PAGE_ID) {
614
                    $mark['sm2_is_sibling'] = true;
615
                }
616
                unset($mark);
617
            }
618
            unset($childSet);
619
        }
620
        
621
        // mark all children of the current page. We don't do this when 
622
        // $CURR_PAGE_ID is 0, as 0 is the parent of everything. 
623
        // $CURR_PAGE_ID == 0 occurs on special pages like search results
624
        // when no referrer is available.s
625
        if ($CURR_PAGE_ID != 0) {
626
            sm2_mark_children($rgParent, $CURR_PAGE_ID, 1);
627
        }
628
        
629
        // store the complete processed menu data as a global. We don't 
630
        // need to read this from the database anymore regardless of how 
631
        // many menus are displayed on the same page.
632
        if (!array_key_exists('show_menu2_data', $GLOBALS)) {
633
            $GLOBALS['show_menu2_data'] = array();
634
        }
635
        $GLOBALS['show_menu2_data'][$aMenu] =& $rgParent;
636
        unset($rgParent);
637
    }
638

    
639
    // adjust $aMaxLevel to the level number of the final level that 
640
    // will be displayed. That is, we display all levels <= aMaxLevel.
641
    if ($aMaxLevel == SM2_ALL) {
642
        $aMaxLevel = 1000;
643
    }
644
    elseif ($aMaxLevel < 0) {   // SM2_CURR+N
645
        $aMaxLevel += $pageLevel - SM2_CURR;
646
    }
647
    elseif ($aMaxLevel >= SM2_MAX) { // SM2_MAX+N
648
        $aMaxLevel += $aStartLevel - SM2_MAX;
649
        if ($aMaxLevel > $pageLevel) {
650
            $aMaxLevel = $pageLevel;
651
        }
652
    }
653
    else {  // SM2_START+N
654
        $aMaxLevel += $aStartLevel - SM2_START;
655
    }
656

    
657
    // generate the menu
658
    $retval = false;
659
    if (array_key_exists($aStart, $GLOBALS['show_menu2_data'][$aMenu])) {
660
        $formatter = $aItemOpen;
661
        if (!is_object($aItemOpen)) {
662
            static $sm2formatter;
663
            if (!isset($sm2formatter)) {
664
                $sm2formatter = new SM2_Formatter;
665
            }
666
            $formatter = $sm2formatter;
667
            $formatter->set($flags, $aItemOpen, $aItemClose, 
668
                $aMenuOpen, $aMenuClose, $aTopItemOpen, $aTopMenuOpen);
669
        }
670
        
671
        // adjust the level until we show everything and ignore the SM2_TRIM flag.
672
        // Usually this will be less than the start level to disable it.
673
        $showAllLevel = $aStartLevel - 1;
674
        if (isset($aOptions['notrim'])) {
675
            $showAllLevel = $aStartLevel + $aOptions['notrim'];
676
        }
677
        
678
        // display the menu
679
        $formatter->initialize();
680
        sm2_recurse(
681
            $GLOBALS['show_menu2_data'][$aMenu],
682
            $aStart,    // parent id to start displaying sub-menus
683
            $aStartLevel, $showAllLevel, $aMaxLevel, $flags, 
684
            $formatter);
685
        $formatter->finalize();
686
        
687
        // if we are returning something, get the data
688
        if (($flags & SM2_BUFFER) != 0) {
689
            $retval = $formatter->getOutput();
690
        }
691
    }
692

    
693
    // clear the data if we aren't caching it
694
    if (($flags & SM2_NOCACHE) != 0) {
695
        unset($GLOBALS['show_menu2_data'][$aMenu]);
696
    }
697
    
698
    return $retval;
699
}
700

    
701
function sm2_mark_children(&$rgParent, $aStart, $aChildLevel)
702
{
703
    if (array_key_exists($aStart, $rgParent)) {
704
        foreach (array_keys($rgParent[$aStart]) as $y) {
705
            $mark =& $rgParent[$aStart][$y];
706
            $mark['sm2_child_level'] = $aChildLevel;
707
            $mark['sm2_on_curr_path'] = true;
708
            sm2_mark_children($rgParent, $mark['page_id'], $aChildLevel+1);
709
        }
710
    }
711
}
712

    
713
function sm2_recurse(
714
    &$rgParent, $aStart, 
715
    $aStartLevel, $aShowAllLevel, $aMaxLevel, $aFlags, 
716
    &$aFormatter
717
    )
718
{
719
    global $wb;
720

    
721
    // on entry to this function we know that there are entries for this 
722
    // parent and all entries for that parent are being displayed. We also 
723
    // need to check if any of the children need to be displayed too.
724
    $isListOpen = false;
725
    $currentLevel = $wb->page['level'] == '' ? 0 : $wb->page['level'];
726
    
727
    // get the number of siblings so we can check pass this and check if the 
728
    // item is first or last
729
    $sibCount = count($rgParent[$aStart]);
730
    $currSib = 0;
731
    foreach ($rgParent[$aStart] as $page) {
732
        $currSib++;
733

    
734
        // skip any elements that are lower than the maximum level
735
        $pageLevel = $page['level'];
736
        if ($pageLevel > $aMaxLevel) {
737
            continue;
738
        }
739
        
740
        // this affects ONLY the top level
741
        if ($aStart == 0 && ($aFlags & SM2_CURRTREE)) {
742
            if (!array_key_exists('sm2_on_curr_path', $page)) { // not set if false, so existence = true
743
                continue;
744
            }
745
            $sibCount = 1;
746
        }
747
        
748
        // trim the tree as appropriate
749
        if ($aFlags & SM2_SIBLING) {
750
            // parents, and siblings and children of current only
751
            if (!array_key_exists('sm2_on_curr_path', $page)      // not set if false, so existence = true
752
                && !array_key_exists('sm2_is_sibling', $page)     // not set if false, so existence = true
753
                && !array_key_exists('sm2_child_level', $page)) { // not set if false, so existence = true
754
                continue;
755
            }
756
        }
757
        else if ($aFlags & SM2_TRIM) {
758
            // parents and siblings of parents
759
            if ($pageLevel > $aShowAllLevel  // permit all levels to be shown
760
                && !array_key_exists('sm2_on_curr_path', $page)    // not set if false, so existence = true
761
                && !array_key_exists('sm2_path_sibling', $page)) {  // not set if false, so existence = true
762
                continue;
763
            }
764
        }
765
        elseif ($aFlags & SM2_CRUMB) {
766
            // parents only
767
            if (!array_key_exists('sm2_on_curr_path', $page)    // not set if false, so existence = true
768
                || array_key_exists('sm2_child_level', $page)) {  // not set if false, so existence = true
769
                continue;
770
            }
771
        }
772

    
773
        // depth first traverse
774
        $nextParent = $page['page_id'];
775

    
776
        // display the current element if we have reached the start level
777
        if ($pageLevel >= $aStartLevel) {
778
            // massage the link into the correct form
779
            if(!INTRO_PAGE && $page['link'] == $wb->default_link) {
780
                $url = WB_URL;
781
            }
782
            else {
783
                $url = $wb->page_link($page['link']);
784
            }
785
                    
786
            // we open the list only when we absolutely need to
787
            if (!$isListOpen) {
788
                $aFormatter->startList($page, $url);
789
                $isListOpen = true;
790
            }
791

    
792
            $aFormatter->startItem($page, $url, $currSib, $sibCount);
793
        }
794
        
795
        // display children as appropriate
796
        if ($pageLevel + 1 <= $aMaxLevel 
797
            && array_key_exists('sm2_has_child', $page)) {  // not set if false, so existence = true
798
            sm2_recurse(
799
                $rgParent, $nextParent, // parent id to start displaying sub-menus
800
                $aStartLevel, $aShowAllLevel, $aMaxLevel, $aFlags, 
801
                $aFormatter);
802
        }
803
        
804
        // close the current element if appropriate
805
        if ($pageLevel >= $aStartLevel) {
806
            $aFormatter->finishItem($pageLevel, $page);
807
        }
808
    }
809

    
810
    // close the list if we opened one
811
    if ($isListOpen) {
812
        $aFormatter->finishList();
813
    }
814
}
815

    
816
?>
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