template.php

   1 <?php
   2 /*=====================================================================*\
   3 || ###################################################################
   4 || # Iris Studios Shared Object Framework [#]version[#]
   5 || # Copyright ©2002-[#]year[#] Iris Studios, Inc.
   6 || #
   7 || # This program is free software; you can redistribute it and/or modify
   8 || # it under the terms of the GNU General Public License as published by
   9 || # the Free Software Foundation; version [#]gpl[#] of the License.
  10 || #
  11 || # This program is distributed in the hope that it will be useful, but
  12 || # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13 || # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  14 || # more details.
  15 || #
  16 || # You should have received a copy of the GNU General Public License along
  17 || # with this program; if not, write to the Free Software Foundation, Inc.,
  18 || # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  19 || ###################################################################
  20 \*=====================================================================*/
  21
  22 /**
  23 * Database-Driven Template System
  24 * template.php
  25 *
  26 * @package      ISSO
  27 */
  28
  29 /**
  30 * Database-Driven Template System
  31 *
  32 * This framework is a backend to the database template engine and
  33 * contains all the parsing algorithms.
  34 *
  35 * @author               Iris Studios, Inc.
  36 * @copyright    Copyright ©2002 - [#]year[#], Iris Studios, Inc.
  37 * @version              $Revision$
  38 * @package              ISSO
  39 *
  40 */
  41 class Template
  42 {
  43         /**
  44         * Framework registry object
  45         * @var  object
  46         */
  47         var $registry = null;
  48
  49         /**
  50         * Name of the database table templates are in
  51         * @var  string
  52         */
  53         var $tablename = '';
  54
  55         /**
  56         * Name of the table column template names are in
  57         * @var  string
  58         */
  59         var $namecolumn = '';
  60
  61         /**
  62         * Name of the table column templates are in
  63         * @var  string
  64         */
  65         var $datacolumn = '';
  66
  67         /**
  68         * Additional WHERE clauses for the template fetch SQL
  69         * @var  string
  70         */
  71         var $extrawhere = '';
  72
  73         /**
  74         * The name of the function phrases are fetched with
  75         * @var  string
  76         */
  77         var $langcall = '$GLOBALS[\'isso:null-framework\']->modules[\'localize\']->string';
  78
  79         /**
  80         * The name of the function phrases are sprintf() parsed with
  81         * @var  string
  82         */
  83         var $langconst = 'sprintf';
  84
  85         /**
  86         * Array of pre-compiled templates that are stored to decrease server load
  87         * @var  array
  88         */
  89         var $cache = array();
  90
  91         /**
  92         * A list of the number of times each template has been used
  93         * @var  array
  94         */
  95         var $usage = array();
  96
  97         /**
  98         * A list of templates that weren't cached, but are still used
  99         * @var  array
 100         */
 101         var $uncached = array();
 102
 103         /**
 104         * Whether or not the page has been flush()'d already
 105         * @var  bool
 106         */
 107         var $doneflush = false;
 108
 109         /**
 110         * Constructor
 111         */
 112         function Template(&$registry)
 113         {
 114                 $this->registry =& $registry;
 115         }
 116
 117         /**
 118         * Takes an array of template names, loads them, and then stores
 119         * a parsed version for optimum speed.
 120         *
 121         * @param        array   List of template names to be cached
 122         */
 123         function cache($namearray)
 124         {
 125                 if (sizeof($this->cache) > 0)
 126                 {
 127                         trigger_error('You cannot cache templates more than once per initialization', E_USER_WARNING);
 128                 }
 129                 else
 130                 {
 131                         $templates = $this->registry->modules['db_mysql']->query("SELECT * FROM " . $this->tablename . " WHERE " . $this->namecolumn . " IN ('" . implode("', '", $namearray) . "')" . ($this->extrawhere ? $this->extrawhere : ''));
 132                         while ($template = $this->registry->modules['db_mysql']->fetch_array($templates))
 133                         {
 134                                 $this->cache[ $template[ $this->namecolumn ] ] = $this->_parse($template[ $this->datacolumn ]);
 135                                 $this->usage["$name"] = 0;
 136                         }
 137                 }
 138         }
 139
 140         /**
 141         * Loads a template from the cache or the _load function and
 142         * stores the parsed version of it
 143         *
 144         * @param        string  The name of the template
 145         *
 146         * @return       string  A parsed and loaded template
 147         */
 148         function fetch($name)
 149         {
 150                 if (isset($this->cache["$name"]))
 151                 {
 152                         $template = $this->cache["$name"];
 153                 }
 154                 else
 155                 {
 156                         $this->uncached[] = $name;
 157                         $this->registry->debug("Manually loading template `$name`");
 158                         $template = $this->_load($name);
 159                         $template = $this->_parse($template);
 160                 }
 161
 162                 if (!isset($this->usage["$name"]))
 163                 {
 164                         $this->usage["$name"] = 0;
 165                 }
 166
 167                 $this->usage["$name"]++;
 168
 169                 return $template;
 170         }
 171
 172         /**
 173         * Output a template fully compiled to the browser
 174         *
 175         * @param        string  Compiled and ready template
 176         */
 177         function flush($template)
 178         {
 179                 ob_start();
 180
 181                 if (empty($template))
 182                 {
 183                         trigger_error('There was no output to print', E_USER_ERROR);
 184                         exit;
 185                 }
 186
 187                 if ($this->registry->debug AND isset($_GET['query']))
 188                 {
 189                         if (is_array($this->registry->modules['db_mysql']->history))
 190                         {
 191                                 echo '<pre>';
 192                                 foreach ($this->registry->modules['db_mysql']->history AS $query)
 193                                 {
 194                                         echo $query . "\n\n<hr />\n\n";
 195                                 }
 196                                 echo '</pre>';
 197                         }
 198                         exit;
 199                 }
 200
 201                 if ($this->doneflush)
 202                 {
 203                         trigger_error('A template has already been sent to the output buffer', E_USER_ERROR);
 204                         exit;
 205                 }
 206
 207                 if ($this->registry->debug)
 208                 {
 209                         // --- START
 210                         $debug = "\n<ul>";
 211
 212                         // templates
 213                         $optlist = array();
 214                         $usage = array();
 215                         foreach ($this->usage AS $name => $count)
 216                         {
 217                                 if (in_array($name, $this->uncached))
 218                                 {
 219                                         $optlist[] = $name . '[' . $count . ']';
 220                                 }
 221                                 $usage[] = $name . " ($count)";
 222                         }
 223
 224                         $sizeof = sizeof($this->uncached);
 225                         if ($sizeof > 0)
 226                         {
 227                                 $debug .= "\n\t<li><strong style=\"color: red\">Uncached Template(s):</strong> $sizeof ( " . implode(' &nbsp; ', $optlist) . " )</li>";
 228                         }
 229
 230                         // source control
 231                         $scinfo = 'Not Under Source Control';
 232                         $possiblescms = array('cvs', 'svn', 'cvs_information', 'svn_information', 'scm', 'sc_information', 'scm_information');
 233                         foreach ($possiblescms AS $scm)
 234                         {
 235                                 if (defined(strtoupper($scm)))
 236                                 {
 237                                         $scinfo = constant(strtoupper($scm));
 238
 239                                         $type = '';
 240                                         // CVS
 241                                         if (strpos($scinfo, 'RCSfile:') !== false)
 242                                         {
 243                                                 $type = 'cvs';
 244                                         }
 245                                         else if (strpos($scinfo, ',v ') !== false)
 246                                         {
 247                                                 $type = 'cvs';
 248                                         }
 249                                         // SVN
 250                                         else if (strpos($scinfo, 'URL:') !== false)
 251                                         {
 252                                                 $type = 'svn';
 253                                         }
 254                                         else if (strpos($scinfo, 'https://') !== false OR strpos($scinfo, 'http://') !== false)
 255                                         {
 256                                                 $type= 'svn';
 257                                         }
 258                                         // not found so just return it
 259                                         // try a SVN ID tag as we can't really tell if we're using it
 260                                         else
 261                                         {
 262                                                 $test = preg_replace('#\$' . 'Id: (.+?) (.+?) [0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}(.+?) (.+?) \$#', '\\1 - SVN \\2', $scinfo);
 263                                                 if ($test == '$' . 'Id: $')
 264                                                 {
 265                                                         $scinfo = 'Not Under Source Control';
 266                                                 }
 267                                                 else
 268                                                 {
 269                                                         $scinfo = $test;
 270                                                 }
 271                                                 break;
 272                                         }
 273
 274                                         if ($type == 'cvs')
 275                                         {
 276                                                 $scinfo = preg_replace('#\$' . 'RCSfile: (.+?) \$#', '\\1', $scinfo);
 277                                                 $scinfo = preg_replace('#\$' . 'Revision: (.+?) \$#', 'CVS \\1', $scinfo);
 278                                                 $scinfo = preg_replace('#\$' . 'Id: (.+?) (.+?) [0-9]{4}/[0-9]{2}/[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2} (.+?) (.+?) \$#', '\\1 - CVS \\2', $scinfo);
 279                                         }
 280                                         else if ($type == 'svn')
 281                                         {
 282                                                 $scinfo = preg_replace('#\$' . '(Head)?URL: (.+?) \$#e', "end(explode('/', '\\2'))", $scinfo);
 283                                                 $scinfo = preg_replace('#\$' . '(LastModified)?Revision: (.+?) \$#', 'SVN \\2', $scinfo);
 284                                                 $scinfo = preg_replace('#\$' . 'Id: (.+?) ([0-9].+?) [0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}(.+?) (.+?) \$#', '\\1 - SVN \\2', $scinfo);
 285                                         }
 286                                         else
 287                                         {
 288                                                 $scinfo = 'Not Under Source Control';
 289                                         }
 290                                         break;
 291                                 }
 292                         }
 293                         $scinfo = trim($scinfo);
 294                         $debug .= "\n\t<li><strong>Source Control:</strong> $scinfo</li>";
 295
 296                         // query information
 297                         if (is_object($this->registry->modules['db_mysql']))
 298                         {
 299                                 $debug .= "\n\t<li><strong>Total Queries:</strong> " . sizeof($this->registry->modules['db_mysql']->history) . " (<a href=\"" . $this->registry->sanitize($_SERVER['REQUEST_URI']) . ((strpos($_SERVER['REQUEST_URI'], '?') !== false) ? '&amp;query=1' : '?query=1') . "\">?</a>)</li>";
 300                         }
 301
 302                         // total execution time
 303                         if (defined('ISSO_MT_START'))
 304                         {
 305                                 $this->registry->load('functions', 'functions');
 306                                 $debug .= "\n\t<li><strong>Total Execution Time:</strong> " . round($this->registry->modules['functions']->fetch_microtime_diff(ISSO_MT_START), 10) . "</li>";
 307                         }
 308
 309                         // debug notices
 310                         $debug .= "\n\t<li>\n\t\t<select>\n\t\t\t<option>Debug Notices (" . sizeof($this->registry->debuginfo) . ")</option>";
 311                         foreach ((array)$this->registry->debuginfo AS $msg)
 312                         {
 313                                 $debug .= "\n\t\t\t<option>--- $msg</option>";
 314                         }
 315                         $debug .= "\n\t\t</select>\n\t</li>";
 316
 317                         // loaded modules
 318                         $modules = $this->registry->show_modules(true);
 319                         $debug .= "\n\t<li>\n\t\t<select>\n\t\t\t<option>Loaded Modules (" . sizeof($modules) . ")</option>";
 320                         foreach ($modules AS $mod)
 321                         {
 322                                 $debug .= "\n\t\t\t<option>--- $mod</option>";
 323                         }
 324                         $debug .= "\n\t\t</select>\n\t</li>";
 325
 326                         // template usage
 327                         $debug .= "\n\t<li>\n\t\t<select>\n\t\t\t<option>Template Usage (" . array_sum($this->usage) . ")</option>";
 328                         foreach ($usage AS $tpl)
 329                         {
 330                                 $debug .= "\n\t\t\t<option>--- $tpl</option>";
 331                         }
 332                         $debug .= "\n\t\t</select>\n\t</li>";
 333
 334                         // --- END
 335                         $debug .= "\n</ul>";
 336
 337                         $debug = "\n<hr />\n" . $this->registry->_message('Debug Information', $debug, 1, true);
 338                         $template = str_replace('</body>', "\n\n<!-- dev debug -->\n<div align=\"center\">\n$debug\n</div>\n<!-- / dev debug -->\n\n</body>", $template);
 339                 }
 340
 341                 print(stripslashes($template));
 342         }
 343
 344         /**
 345         * Loads an additional template from the database
 346         *
 347         * @param        string  The name of the template
 348         *
 349         * @return       string  Template data from the database
 350         */
 351         function _load($name)
 352         {
 353                 if ($template = $this->registry->modules['db_mysql']->query("SELECT * FROM " . $this->tablename . " WHERE " . $this->namecolumn . " = '$name'" . ($this->extrawhere ? $this->extrawhere : '')))
 354                 {
 355                         return $template[ $this->datacolumn ];
 356                 }
 357                 else
 358                 {
 359                         trigger_error("The template '$name' could not be loaded", E_USER_ERROR);
 360                         exit;
 361                 }
 362         }
 363
 364         /**
 365         * A wrapper for all the parsing functions and compiling functins
 366         *
 367         * @param        string  Unparsed template data
 368         *
 369         * @return       string  Parsed template data
 370         */
 371         function _parse($template)
 372         {
 373                 $template = stripslashes($template);
 374                 $template = str_replace('"', '\"', $template);
 375                 $template = $this->_parse_phrases($template);
 376                 $template = $this->_parse_conditionals($template);
 377                 return $template;
 378         }
 379
 380         /**
 381         * Prepares language and locale information inside templates
 382         *
 383         * @param        string  Template data to be processed
 384         *
 385         * @return       string  Language-ready template data
 386         */
 387         function _parse_phrases($template)
 388         {
 389                 $tag_start = '<lang ';
 390                 $tag_start_end = '\">';
 391                 $tag_end = '</lang>';
 392
 393                 $location_start = -1;
 394                 $location_end = -1;
 395
 396                 // Process the empty phrase objects -- do this now so we don't have to worry about it when we're parsing later
 397                 $template = preg_replace('#\{@\\\"(.*?)\\\"\}#i', '" . ' . $this->langcall . '(\'$1\') . "', $template);
 398
 399                 while (1)
 400                 {
 401                         // Find the start language object tag
 402                         $location_start = strpos($template, $tag_start, $location_end + 1);
 403                         if ($location_start === false)
 404                         {
 405                                 break;
 406                         }
 407
 408                         // Find the end tag
 409                         $location_end = strpos($template, $tag_end, $location_end + strlen($tag_end));
 410                         if ($location_end === false)
 411                         {
 412                                 break;
 413                         }
 414
 415                         // Extract the language object
 416                         $phrase_bunch = substr($template, $location_start, ($location_end + strlen($tag_end)) - $location_start);
 417
 418                         // Find the close to the opening <lang>
 419                         $close_of_open = strpos($phrase_bunch, $tag_start_end);
 420                         if ($close_of_open === false)
 421                         {
 422                                 break;
 423                         }
 424
 425                         // Extract the opening tag so it can be parsed
 426                         $init_tag = substr($phrase_bunch, 0, ($close_of_open + strlen($tag_start_end)));
 427                         $init_tag = str_replace($tag_start, '', $init_tag);
 428                         $init_tag = substr($init_tag, 0, strlen($init_tag) - 1);
 429
 430                         // Get the args out of the tag
 431                         $args = preg_split('#([0-9].*?)=#', $init_tag);
 432                         foreach ($args AS $arg)
 433                         {
 434                                 if ($arg AND $arg != ' ')
 435                                 {
 436                                         $arg = trim($arg);
 437                                         $arg = substr($arg, 2);
 438                                         $arg = substr($arg, 0, strlen($arg) - 2);
 439                                         $arglist[] = $arg;
 440                                 }
 441                         }
 442
 443                         // Just get the phrase name
 444                         $phrase_name = preg_replace('#<lang(.*?)>(.*?)</lang>#i', '$2', $phrase_bunch);
 445
 446                         // Wrap the parsed data into the build function
 447                         $function_wrap = '" . ' . $this->langconst . '("' . $phrase_name . '", "' . implode('", "', $arglist) . '") . "';
 448
 449                         // Replace the fully-parsed string back into the template
 450                         $template = substr_replace($template, $function_wrap, $location_start, $location_end + strlen($tag_end) - $location_start);
 451
 452                         unset($arglist);
 453                 }
 454
 455                 return $template;
 456         }
 457
 458         /**
 459         * Parser for in-line template conditionals
 460         *
 461         * @param        string  Template data awaiting processing
 462         *
 463         * @return       string  Parsed template data
 464         */
 465         function _parse_conditionals($template)
 466         {
 467                 // tag data
 468                 $tag_start = '<if condition=\"';
 469                 $tag_start_end = '\">';
 470                 $tag_else = '<else />';
 471                 $tag_end = '</if>';
 472
 473                 // tag stack
 474                 $stack = array();
 475
 476                 // the information about the current active tag
 477                 $tag_full = array();
 478                 $parsed = array();
 479
 480                 // start at 0
 481                 $offset = 0;
 482
 483                 while (1)
 484                 {
 485                         if (strpos($template, $tag_start) === false)
 486                         {
 487                                 break;
 488                         }
 489
 490                         for ($i = $offset; $i < strlen($template); $i++)
 491                         {
 492                                 // we've found ourselves a conditional!
 493                                 if (substr($template, $i, strlen($tag_start)) == $tag_start)
 494                                 {
 495                                         // push the position into the tag stack
 496                                         if ($tag_full)
 497                                         {
 498                                                 array_push($stack, $i);
 499                                         }
 500                                         else
 501                                         {
 502                                                 $tag_full['posi'] = $i;
 503                                         }
 504                                 }
 505                                 // locate else tags
 506                                 else if (substr($template, $i, strlen($tag_else)) == $tag_else)
 507                                 {
 508                                         if (count($stack) == 0 AND !isset($tag_full['else']))
 509                                         {
 510                                                 $tag_full['else'] = $i;
 511                                         }
 512                                 }
 513                                 // do we have an end tag?
 514                                 else if (substr($template, $i, strlen($tag_end)) == $tag_end)
 515                                 {
 516                                         if (count($stack) != 0)
 517                                         {
 518                                                 array_pop($stack);
 519                                                 continue;
 520                                         }
 521
 522                                         // calculate the position of the end tag
 523                                         $tag_full['posf'] = $i + strlen($tag_end) - 1;
 524
 525                                         // extract the entire conditional from the template
 526                                         $fullspread = substr($template, $tag_full['posi'], $tag_full['posf'] - $tag_full['posi'] + 1);
 527
 528                                         // remove the beginning tag
 529                                         $conditional = substr($fullspread, strlen($tag_start));
 530
 531                                         // find the end of the expression
 532                                         $temp_end = strpos($conditional, $tag_start_end);
 533
 534                                         // save the expression
 535                                         $parsed[0] = stripslashes(substr($conditional, 0, $temp_end));
 536
 537                                         // remove the expression from the conditional
 538                                         $conditional = substr($conditional, strlen($parsed[0]) + strlen($tag_start_end));
 539
 540                                         // remove the tailing end tag
 541                                         $conditional = substr($conditional, 0, strlen($conditional) - strlen($tag_end));
 542
 543                                         // handle the else
 544                                         if (isset($tag_full['else']))
 545                                         {
 546                                                 // now relative to the start of the <if>
 547                                                 $relpos = $tag_full['else'] - $tag_full['posi'];
 548
 549                                                 // calculate the length of the expression and opening tag
 550                                                 $length = strlen($parsed[0]) + strlen($tag_start) + strlen($tag_start_end);
 551
 552                                                 // relative to the start of iftrue
 553                                                 $elsepos = $relpos - $length;
 554
 555                                                 $parsed[1] = substr($conditional, 0, $elsepos);
 556                                                 $parsed[2] = substr($conditional, $elsepos + strlen($tag_else));
 557                                         }
 558                                         // no else to handle
 559                                         else
 560                                         {
 561                                                 $parsed[1] = $conditional;
 562                                                 $parsed[2] = '';
 563                                         }
 564                                         #var_dump($parsed);
 565
 566                                         // final parsed output
 567                                         $parsed = '" . ((' . stripslashes($parsed[0]) . ') ? "' . $parsed[1] . '" : "' . $parsed[2] . '") . "';
 568
 569                                         // replace the conditional
 570                                         $template = str_replace($fullspread, $parsed, $template);
 571
 572                                         // reset the parser
 573                                         $offset = $tag_full['posi'] + strlen($tag_start) + strlen($tag_start_end);
 574                                         $tag_full = array();
 575                                         $stack = array();
 576                                         $parsed = array();
 577                                         unset($fullspread, $conditional, $temp_end, $relpos, $length, $elsepos);
 578                                         break;
 579                                 }
 580                         }
 581                 }
 582
 583                 return $template;
 584         }
 585 }
 586
 587 /**
 588 * Debugging function used to print characters
 589 * in a string that are around a certain position.
 590 *
 591 * @param        string  The haystack string
 592 * @param        integer Position to print around
 593 */
 594 function print_around($str, $pos)
 595 {
 596         echo '>>> PA >>>>>>>>[';
 597         echo htmlspecialchars($str[ $pos - 5 ]);
 598         echo htmlspecialchars($str[ $pos - 4 ]);
 599         echo htmlspecialchars($str[ $pos - 3 ]);
 600         echo htmlspecialchars($str[ $pos - 2 ]);
 601         echo htmlspecialchars($str[ $pos - 1 ]);
 602         echo '©';
 603         echo htmlspecialchars($str[ $pos + 0 ]);
 604         echo htmlspecialchars($str[ $pos + 1 ]);
 605         echo htmlspecialchars($str[ $pos + 2 ]);
 606         echo htmlspecialchars($str[ $pos + 3 ]);
 607         echo htmlspecialchars($str[ $pos + 4 ]);
 608         echo htmlspecialchars($str[ $pos + 5 ]);
 609         echo ']<<<<<<<< PA <<<';
 610 }
 611
 612 /*=====================================================================*\
 613 || ###################################################################
 614 || # $HeadURL$
 615 || # $Id$
 616 || ###################################################################
 617 \*=====================================================================*/
 618 ?>