inc/classes/main/helper/class_BaseHelper.php

   1 <?php
   2 /**
   3  * A generic helper class with generic methods
   4  *
   5  * @author              Roland Haeder <webmaster@ship-simu.org>
   6  * @version             0.0.0
   7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009, 2010 Core Developer Team
   8  * @license             GNU GPL 3.0 or any newer version
   9  * @link                http://www.ship-simu.org
  10  *
  11  * This program is free software: you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation, either version 3 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  23  */
  24 class BaseHelper extends BaseFrameworkSystem {
  25         /**
  26          * Instance to the class which provides field values
  27          */
  28         private $valueInstance = null;
  29
  30         /**
  31          * Extra instance to the class which provides field values
  32          */
  33         private $extraInstance = null;
  34
  35         /**
  36          * Rendered content created by the helper class
  37          */
  38         private $content = '';
  39
  40         /**
  41          * Array with groups
  42          */
  43         private $groups = array();
  44
  45         /**
  46          * Array with sub group
  47          */
  48         private $subGroups = array();
  49
  50         /**
  51          * Previously opened group
  52          */
  53         private $previousGroupId = '';
  54
  55         /**
  56          * Previously opened sub group
  57          */
  58         private $previousSubGroupId = '';
  59
  60         /**
  61          * Total counter for groups and sub groups
  62          */
  63         private $totalCounter = 0;
  64
  65         // Exception constants
  66         const EXCEPTION_GROUP_NOT_OPENED             = 0x1e3;
  67         const EXCEPTION_GROUP_ALREADY_FOUND          = 0x1e4;
  68         const EXCEPTION_SUB_GROUP_ALREADY_FOUND      = 0x1e5;
  69         const EXCEPTION_NO_PREVIOUS_SUB_GROUP_OPENED = 0x1e6;
  70         const EXCEPTION_NO_PREVIOUS_GROUP_OPENED     = 0x1e7;
  71
  72         /**
  73          * Protected constructor
  74          *
  75          * @param       $className      Real name of the class
  76          * @return      void
  77          */
  78         protected function __construct ($className) {
  79                 // Call parent constructor
  80                 parent::__construct($className);
  81         }
  82
  83         /**
  84          * Adds content directly
  85          *
  86          * @param       $newContent             New content to add
  87          * @return      void
  88          */
  89         protected final function addContent ($newContent) {
  90                 $this->content .= (string) trim($newContent) . "\n";
  91         }
  92
  93         /**
  94          * Add header content to the helper
  95          *
  96          * @param       $content        Content to to the base
  97          * @return      void
  98          */
  99         protected function addHeaderContent ($content) {
 100                 // Add the header content
 101                 $this->groups['header']['content'] = (string) trim($content);
 102         }
 103
 104         /**
 105          * Add footer content to the helper
 106          *
 107          * @param       $content        Content to to the base
 108          * @return      void
 109          */
 110         protected function addFooterContent ($content) {
 111                 // Add the footer content
 112                 $this->groups['footer']['content'] = (string) trim($content);
 113         }
 114
 115         /**
 116          * Adds content to the previously opened group or sub group. If a sub group
 117          * was found it will be taken. If no group/sub group is opened at the moment
 118          * the code will be passed to addContent().
 119          *
 120          * @param       $newContent             New content to add
 121          * @return      void
 122          */
 123         protected final function addContentToPreviousGroup ($newContent) {
 124                 // Check for sub/group
 125                 if ($this->ifSubGroupOpenedPreviously()) {
 126                         // Get sub group id
 127                         $subGroupId = $this->getPreviousSubGroupId();
 128
 129                         // Add the content
 130                         $this->subGroups[$subGroupId]['content'] .= $newContent;
 131                 } elseif ($this->ifGroupOpenedPreviously()) {
 132                         // Get group id
 133                         $groupId = $this->getPreviousGroupId();
 134
 135                         // Add the content
 136                         $this->groups[$groupId]['content'] .= $newContent;
 137                 } else {
 138                         // Add it directly
 139                         $this->addContent($newContent);
 140                 }
 141         }
 142
 143         /**
 144          * Getter for content
 145          *
 146          * @return      $content        The rendered content by this helper
 147          */
 148         protected final function getContent () {
 149                 return $this->content;
 150         }
 151
 152         /**
 153          *  Assigns a field from the value instance with a template variable
 154          *
 155          * @param       $fieldName      Name of the field to assign
 156          * @return      void
 157          */
 158         public function assignField ($fieldName) {
 159                 // Get the value from value instance
 160                 $fieldValue = $this->getValueField($fieldName);
 161
 162                 // Assign it with a template variable
 163                 $this->getTemplateInstance()->assignVariable('block_' . $fieldName, $fieldValue);
 164         }
 165
 166         /**
 167          * Assigns a field from the value instance with a template variable but
 168          * parses its content through a given filter method of the value instance
 169          *
 170          * @param       $fieldName              Name of the field to assign
 171          * @param       $filterMethod   Method name to call of the value instance
 172          * @return      void
 173          * @todo        Rewrite this method using a helper class for filtering data
 174          */
 175         public function assignFieldWithFilter ($fieldName, $filterMethod) {
 176                 // Get the value
 177                 $fieldValue = $this->getValueField($fieldName);
 178                 //* DEBUG: */ $this->debugOutput($fieldName.'='.$fieldValue);
 179
 180                 // Now filter it through the value through the filter method
 181                 $filteredValue = call_user_func_array(array($this, 'doFilter' . $this->convertToClassName($filterMethod)), array($fieldValue));
 182
 183                 // Assign it with a template variable
 184                 $this->getTemplateInstance()->assignVariable('block_' . $fieldName, $filteredValue);
 185         }
 186
 187         /**
 188          * Pre-fetches field default values from the given registry key instance into this class
 189          *
 190          * @param       $registryKey    Registry key which holds an object with values
 191          * @param       $extraKey               Extra value instance key used if registryKey is null
 192          * @return      void
 193          * @throws      NullPointerException    If recovery of requested value instance failed
 194          */
 195         public function prefetchValueInstance ($registryKey, $extraKey = null) {
 196                 //* DEBUG: */ $this->debugOutput('O:'.$registryKey.'/'.$extraKey);
 197                 try {
 198                         // Get the required instance
 199                         $this->valueInstance = Registry::getRegistry()->getInstance($registryKey);
 200                 } catch (NullPointerException $e) {
 201                         // Not set in registry
 202                         // @TODO Try to log it here
 203                         //* DEBUG: */ $this->debugOutput($registryKey.'=NULL!');
 204                 }
 205
 206                 // Shall we get an extra instance?
 207                 if (!is_null($extraKey)) {
 208                         try {
 209                                 // Get the extra instance.
 210                                 $this->extraInstance = Registry::getRegistry()->getInstance($extraKey);
 211                         } catch (NullPointerException $e) {
 212                                 // Try to create it
 213                                 $this->extraInstance = ObjectFactory::createObjectByConfiguredName($extraKey . '_class', array($this->valueInstance));
 214                         }
 215                         //* DEBUG: */ $this->debugOutput($extraKey.'='.$this->extraInstance.' - EXTRA!');
 216                 } // END - if
 217
 218                 // Is the value instance valid?
 219                 if (is_null($this->valueInstance)) {
 220                         try {
 221                                 // Get the requested instance
 222                                 $this->valueInstance = ObjectFactory::createObjectByConfiguredName($registryKey . '_class', array($this->extraInstance));
 223                         } catch (FrameworkException $e) {
 224                                 // Okay, nothing found so throw a null pointer exception here
 225                                 throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
 226                         }
 227                 } // END - if
 228         }
 229
 230         /**
 231          * Opens a helper group with given group id and content or throws an
 232          * exception if that group is already found regardless if it is open or
 233          * closed.
 234          *
 235          * @param       $groupId        Group id to open
 236          * @param       $content        Initial content to add to the group
 237          * @param       $tag            HTML tag used to open this group
 238          * @return      void
 239          * @throws      HelperGroupAlreadyCreatedException      If the group was already created before
 240          */
 241         protected function openGroupByIdContent ($groupId, $content, $tag) {
 242                 //* DEBUG: */ echo "OPEN:groupId={$groupId},content=<pre>".htmlentities($content)."</pre>\n";
 243                 // Is the group already there?
 244                 if (isset($this->groups[$groupId])) {
 245                         // Then throw an exception here
 246                         throw new HelperGroupAlreadyCreatedException(array($this, $groupId), self::EXCEPTION_GROUP_ALREADY_FOUND);
 247                 } // END - if
 248
 249                 // Count one up
 250                 $this->totalCounter++;
 251
 252                 // Add the group to the stack
 253                 $this->groups[$this->totalCounter] = $groupId;
 254                 $this->groups[$groupId]['opened']  = true;
 255                 $this->groups[$groupId]['content'] = sprintf(
 256                         "<!-- group %s opened (length: %s, tag: %s) //-->%s\n",
 257                         $groupId,
 258                         strlen($content),
 259                         $tag,
 260                         $content
 261                 );
 262                 $this->groups[$groupId]['tag'] = $tag;
 263
 264                 // Mark this group as previously opened
 265                 $this->setPreviousGroupId($groupId);
 266         }
 267
 268         /**
 269          * Closes the previously opened group by added given content to it or
 270          * throws an exception if no previous group was opened
 271          *
 272          * @param       $content        Content for previously opened group, or empty to use tag of opener
 273          * @return      void
 274          * @throws      HelperNoPreviousOpenedGroupException    If no previously opened group was found
 275          */
 276         public function closePreviousGroupByContent ($content = '') {
 277                 // Check if any sub group was opened before
 278                 if ($this->ifSubGroupOpenedPreviously()) {
 279                         // Close it automatically
 280                         $this->closePreviousSubGroupByContent();
 281                 } // END - if
 282
 283                 // Check if any group was opened before
 284                 if ($this->ifGroupOpenedPreviously() === false) {
 285                         // Then throw an exception
 286                         throw new HelperNoPreviousOpenedGroupException(array($this, $content), self::EXCEPTION_NO_PREVIOUS_SUB_GROUP_OPENED);
 287                 } // END - if
 288
 289                 // Get previous group
 290                 $groupId = $this->getPreviousGroupId();
 291
 292                 // Is the content empty?
 293                 if ((empty($content)) && (!empty($this->groups[$groupId]['tag']))) {
 294                         // Get it from opener
 295                         $content = sprintf(
 296                                 "<!-- group %s auto-closed //--></%s>",
 297                                 $groupId,
 298                                 $this->groups[$groupId]['tag']
 299                         );
 300                 } // END - if
 301
 302                 // Add content to it and mark it as closed
 303                 $this->groups[$groupId]['content'] .= sprintf(
 304                         "<!-- group %s closed (length: %s, tag: %s) //-->%s\n",
 305                         $groupId,
 306                         strlen($content),
 307                         $this->groups[$groupId]['tag'],
 308                         $content
 309                 );
 310                 $this->groups[$groupId]['opened'] = false;
 311
 312                 // Mark previous group as closed
 313                 $this->setPreviousGroupId('');
 314                 //* DEBUG: */ echo "CLOSE:groupId={$groupId}<br />\n";
 315         }
 316
 317         /**
 318          * Opens a helper sub group with given group id and content or throws an
 319          * exception if that sub group is already found regardless if it is open or
 320          * closed.
 321          *
 322          * @param       $subGroupId             Sub group id to open
 323          * @param       $content                Initial content to add to the sub group
 324          * @param       $tag                    HTML tag used to open this group
 325          * @return      void
 326          * @throws      HelperSubGroupAlreadyCreatedException   If the sub group was already created before
 327          */
 328         protected function openSubGroupByIdContent ($subGroupId, $content, $tag) {
 329                 //* DEBUG: */ echo "OPEN:subGroupId={$subGroupId},content=".htmlentities($content)."<br />\n";
 330                 // Is the group already there?
 331                 if (isset($this->subGroups[$subGroupId])) {
 332                         // Then throw an exception here
 333                         throw new HelperSubGroupAlreadyCreatedException(array($this, $subGroupId), self::EXCEPTION_SUB_GROUP_ALREADY_FOUND);
 334                 } // END - if
 335
 336                 // Count one up
 337                 $this->totalCounter++;
 338
 339                 // Add the group to the stack
 340                 $this->subGroups[$this->totalCounter] = $subGroupId;
 341                 $this->subGroups[$subGroupId]['opened']  = true;
 342                 $this->subGroups[$subGroupId]['content'] = sprintf("<!-- sub-group %s opened (length: %s, tag: %s) //-->%s\n", $subGroupId, strlen($content), $tag, $content);
 343                 $this->subGroups[$subGroupId]['tag'] = $tag;
 344
 345                 // Mark this group as previously opened
 346                 $this->setPreviousSubGroupId($subGroupId);
 347         }
 348
 349         /**
 350          * Closes the previously opened sub group by added given content to it or
 351          * throws an exception if no previous sub group was opened
 352          *
 353          * @param       $content        Content for previously opened sub group, or leave empty to use div/span of openener
 354          * @return      void
 355          * @throws      HelperNoPreviousOpenedSubGroupException If no previously opened sub group was found
 356          */
 357         public function closePreviousSubGroupByContent ($content = '') {
 358                 // Check if any sub group was opened before
 359                 if ($this->ifSubGroupOpenedPreviously() === false) {
 360                         // Then throw an exception
 361                         throw new HelperNoPreviousOpenedSubGroupException(array($this, $content), self::EXCEPTION_NO_PREVIOUS_SUB_GROUP_OPENED);
 362                 } // END - if
 363
 364                 // Get previous sub group
 365                 $subGroupId = $this->getPreviousSubGroupId();
 366
 367                 // Is the content empty?
 368                 if ((empty($content)) && (!empty($this->subGroups[$subGroupId]['tag']))) {
 369                         // Get it from opener
 370                         $content = sprintf("<!-- sub-group %s auto-closed //--></%s>", $subGroupId, $this->subGroups[$subGroupId]['tag']);
 371                 } // END - if
 372
 373                 // Add content to it and mark it as closed
 374                 $this->subGroups[$subGroupId]['content'] .= sprintf("<!-- sub-group %s closed (length: %s, tag: %s) //-->%s\n", $subGroupId, strlen($content), $this->subGroups[$subGroupId]['tag'], $content);
 375                 $this->subGroups[$subGroupId]['opened'] = false;
 376
 377                 // Mark previous sub group as closed
 378                 $this->setPreviousSubGroupId('');
 379                 //* DEBUG: */ echo "CLOSE:subGroupId={$subGroupId}<br />\n";
 380         }
 381
 382         /**
 383          * Renders all group and sub group in their order
 384          *
 385          * @return      $content        Rendered HTML content
 386          */
 387         public function renderContent () {
 388                 // Initialize content
 389                 $content = '';
 390
 391                 // Is header content there?
 392                 if (isset($this->groups['header'])) {
 393                         // Then add it
 394                         $content .= $this->groups['header']['content'] . "\n";
 395                 } // END - if
 396
 397                 // Initiate content
 398                 $content .= $this->getContent();
 399
 400                 // Now "walk" through all groups and sub-groups
 401                 for ($idx = 1; $idx <= $this->totalCounter; $idx++) {
 402                         // Is this a sub/group and is it closed?
 403                         if ((isset($this->groups[$idx])) && ($this->groups[$this->groups[$idx]]['opened'] === false)) {
 404                                 // Then add it's content
 405                                 $groupContent = trim($this->groups[$this->groups[$idx]]['content']);
 406                                 //* DEBUG: */ echo "group={$this->groups[$idx]},content=<pre>".htmlentities($groupContent)."</pre><br />\n";
 407                                 $content .= $groupContent;
 408                         } elseif ((isset($this->subGroups[$idx])) && ($this->subGroups[$this->subGroups[$idx]]['opened'] === false)) {
 409                                 // Then add it's content
 410                                 $subGroupContent = $this->subGroups[$this->subGroups[$idx]]['content'];
 411                                 //* DEBUG: */ echo "subgroup={$this->subGroups[$idx]},content=<pre>".htmlentities($subGroupContent)."</pre><br />\n";
 412                                 $content .= trim($subGroupContent);
 413                         } else {
 414                                 // Something went wrong
 415                                 $this->debugInstance(__METHOD__."(): Something unexpected happened here.");
 416                         }
 417                 } // END - for
 418
 419                 // Is footer content there?
 420                 if (isset($this->groups['footer'])) {
 421                         // Then add it
 422                         $content .= $this->groups['footer']['content'] . "\n";
 423                 } // END - if
 424
 425                 // Return it
 426                 //* DEBUG: */ echo "content=<pre>".htmlentities($content)."</pre> (".strlen($content).")<br />\n";
 427                 return $content;
 428         }
 429
 430         /**
 431          * Checks wether the specified group is opened
 432          *
 433          * @param       $groupId        Id of group to check
 434          * @return      $isOpened       Wether the specified group is open
 435          */
 436         protected function ifGroupIsOpened ($groupId) {
 437                 // Is the group open?
 438                 $isOpened = ((isset($this->groups[$groupId])) && ($this->groups[$groupId]['opened'] === true));
 439
 440                 // Return status
 441                 return $isOpened;
 442         }
 443
 444         /**
 445          * Getter for direct field values
 446          *
 447          * @param       $fieldName              Name of the field we shall fetch
 448          * @return      $fieldValue             Value from field
 449          * @throws      NullPointerException    Thrown if $valueInstance is null
 450          */
 451         public function getValueField ($fieldName) {
 452                 // The $valueInstance attribute should not be null!
 453                 if (is_null($this->getValueInstance())) {
 454                         // Throws an exception here
 455                         throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
 456                 } // END - if
 457
 458                 // Get the field value
 459                 $fieldValue = $this->getValueInstance()->getField($fieldName);
 460                 //* DEBUG: */ $this->debugOutput($fieldName.'[]='.gettype($fieldValue).'('.strlen($fieldValue).')');
 461
 462                 // Is it null?
 463                 if ((is_null($fieldValue)) && (!is_null($this->extraInstance))) {
 464                         // So try the extra instance
 465                         $fieldValue = $this->extraInstance->getField($fieldName);
 466                 } // END - if
 467
 468                 // Return it
 469                 return $fieldValue;
 470         }
 471
 472         /**
 473          * Getter for value instance
 474          *
 475          * @return      $valueInstance  Instance of the class holding our values
 476          */
 477         public final function getValueInstance () {
 478                 return $this->valueInstance;
 479         }
 480
 481         /**
 482          * Check wether a group was opened previously
 483          *
 484          * @return      $groupOpened    Wether any group was opened before
 485          */
 486         protected final function ifGroupOpenedPreviously () {
 487                 $groupOpened = (!empty($this->previousGroupId));
 488                 return $groupOpened;
 489         }
 490
 491         /**
 492          * Check wether a group was opened previously
 493          *
 494          * @return      $subGroupOpened         Wether any group was opened before
 495          */
 496         protected final function ifSubGroupOpenedPreviously () {
 497                 $subGroupOpened = (!empty($this->previousSubGroupId));
 498                 return $subGroupOpened;
 499         }
 500
 501         /**
 502          * Getter for previous group id
 503          *
 504          * @return      $previousGroupId        Id of previously opened group
 505          */
 506         protected final function getPreviousGroupId () {
 507                 return $this->previousGroupId;
 508         }
 509
 510         /**
 511          * Setter for previous group id
 512          *
 513          * @param       $previousGroupId        Id of previously opened group
 514          * @return      void
 515          */
 516         protected final function setPreviousGroupId ($previousGroupId) {
 517                 $this->previousGroupId = (string) $previousGroupId;
 518         }
 519
 520         /**
 521          * Getter for previous sub group id
 522          *
 523          * @return      $previousSubGroupId             Id of previously opened sub group
 524          */
 525         protected final function getPreviousSubGroupId () {
 526                 return $this->previousSubGroupId;
 527         }
 528
 529         /**
 530          * Setter for previous sub group id
 531          *
 532          * @param       $previousSubGroupId             Id of previously opened sub group
 533          * @return      void
 534          */
 535         protected final function setPreviousSubGroupId ($previousSubGroupId) {
 536                 $this->previousSubGroupId = (string) $previousSubGroupId;
 537         }
 538 }
 539
 540 // [EOF]
 541 ?>