/source/Plug-in/xajax/examples/thewall/thewall.server.php

http://prosporous.googlecode.com/ · PHP · 236 lines · 119 code · 24 blank · 93 comment · 13 complexity · 5bff4f139f47acebd4540902e3f0c9e8 MD5 · raw file 

    

  1. <?php

    2. 

  2. /*

    3. 

  3. 	File: thewall.server.php

    4. 

  4. 

    5. 

  5. 	Example which demonstrates a xajax implementation of a graffiti wall.

    6. 

  6. 	

    7. 

  7. 	Title: Graffiti Wall Example

    8. 

  8. 	

    9. 

  9. 	Please see <copyright.inc.php> for a detailed description, copyright

    10. 

  10. 	and license information.

    11. 

  11. */

    12. 

  12. 

    13. 

  13. /*

    14. 

  14. 	Section: Files

    15. 

  15. 	

    16. 

  16. 	- <thewall.php>

    17. 

  17. 	- <thewall.common.php>

    18. 

  18. 	- <thewall.server.php>

    19. 

  19. */

    20. 

  20. 

    21. 

  21. /*

    22. 

  22. 	@package xajax

    23. 

  23. 	@version $Id: thewall.server.php 362 2007-05-29 15:32:24Z calltoconstruct $

    24. 

  24. 	@copyright Copyright (c) 2005-2006 by Jared White & J. Max Wilson

    25. 

  25. 	@license http://www.xajaxproject.org/bsd_license.txt BSD License

    26. 

  26. */

    27. 

  27. 

    28. 

  28. /*

    29. 

  29. 	Section: Define constants

    30. 

  30. 	

    31. 

  31. 	Integer: MAX_SCRIBBLES

    32. 

  32. 	

    33. 

  33. 	The number of scribbles that will be retained.  The default is 5.

    34. 

  34. */

    35. 

  35. if (!defined ('MAX_SCRIBBLES'))

    36. 

  36. {

    37. 

  37. 	define ('MAX_SCRIBBLES', 5);

    38. 

  38. }

    39. 

  39. 

    40. 

  40. /*

    41. 

  41. 	String: DATA_FILE

    42. 

  42. 	

    43. 

  43. 	The file that will be used to store the messages on the server.

    44. 

  44. */

    45. 

  45. if (!defined ('DATA_FILE'))

    46. 

  46. {

    47. 

  47. 	define ('DATA_FILE', "thewall.dta");

    48. 

  48. }

    49. 

  49. 

    50. 

  50. /*

    51. 

  51. 	Class: graffiti

    52. 

  52. */

    53. 

  53. class graffiti

    54. 

  54. {

    55. 

  55. 	/*

    56. 

  56. 		String: html

    57. 

  57. 		

    58. 

  58. 		Stores the html that is being generated for the current request.

    59. 

  59. 	*/

    60. 

  60. 	var $html;

    61. 

  61. 	

    62. 

  62. 	/*

    63. 

  63. 		Boolean: isValid

    64. 

  64. 		

    65. 

  65. 		Indicates that the html generated for this request is valid and

    66. 

  66. 		can be added to the wall <DATA_FILE>.

    67. 

  67. 	*/

    68. 

  68. 	var $isValid = false;

    69. 

  69. 	

    70. 

  70. 	/*

    71. 

  71. 		Constructor: graffiti

    72. 

  72. 		

    73. 

  73. 		Builds the <html> output and sets the <isValid> indicator.

    74. 

  74. 	*/

    75. 

  75. 	function graffiti($sHandle, $sWords)

    76. 

  76. 	{

    77. 

  77. 		if (trim($sHandle) == "" || trim($sWords) == "")

    78. 

  78. 		{

    79. 

  79. 			return;

    80. 

  80. 		}

    81. 

  81. 		$this->html  = "\n<div style=\"font-weight: bold;text-align:".$this->getRandomAlignment();

    82. 

  82. 		$this->html .= ";color:".$this->getRandomColor().";\">";

    83. 

  83. 		$this->html .= "<span style=\"font-size:".$this->getRandomFontSize()."%;\">";

    84. 

  84. 		$this->html .= strip_tags(stripslashes($sWords));

    85. 

  85. 		$this->html .= "</span><br/><span style=\"font-size: small;\">";

    86. 

  86. 		$this->html .= " ~ ".strip_tags(stripslashes($sHandle))." ".date("m/d/Y H:i:s")."</span></div>";

    87. 

  87. 		

    88. 

  88. 		$this->isValid = true;

    89. 

  89. 	}

    90. 

  90. 	

    91. 

  91. 	/*

    92. 

  92. 		Function: getRandomFontSize

    93. 

  93. 		

    94. 

  94. 		Generate a font size based off a random number.

    95. 

  95. 	*/

    96. 

  96. 	function getRandomFontSize()

    97. 

  97. 	{

    98. 

  98. 		srand((double)microtime()*1000003);

    99. 

  99. 		return rand(100,300);

    100. 

  100. 	}

    101. 

  101. 	

    102. 

  102. 	/*

    103. 

  103. 		Function: getRandomColor

    104. 

  104. 		

    105. 

  105. 		Generate a browser safe color based on a random number.

    106. 

  106. 	*/

    107. 

  107. 	function getRandomColor()

    108. 

  108. 	{

    109. 

  109. 		$sColor = "rgb(";

    110. 

  110. 		srand((double)microtime()*1000003);

    111. 

  111. 		$sColor .= rand(0,255).",";

    112. 

  112. 		srand((double)microtime()*1000003);

    113. 

  113. 		$sColor .= rand(0,255).",";

    114. 

  114. 		$sColor .= rand(0,255).")";

    115. 

  115. 		

    116. 

  116. 		return $sColor;

    117. 

  117. 	}

    118. 

  118. 	

    119. 

  119. 	/*

    120. 

  120. 		Function: getRandomAlignment

    121. 

  121. 		

    122. 

  122. 		Generates a text-alignment value based on a random number.

    123. 

  123. 	*/

    124. 

  124. 	function getRandomAlignment()

    125. 

  125. 	{

    126. 

  126. 		$sAlign = "";

    127. 

  127. 		srand((double)microtime()*1000003);

    128. 

  128. 		$textAlign = rand(0,2);

    129. 

  129. 		switch($textAlign)

    130. 

  130. 		{

    131. 

  131. 			case 0: $sAlign = "left"; break;

    132. 

  132. 			case 1: $sAlign = "right"; break;

    133. 

  133. 			case 2: $sAlign = "center"; break;

    134. 

  134. 			

    135. 

  135. 		}

    136. 

  136. 		return $sAlign;

    137. 

  137. 	}

    138. 

  138. 	

    139. 

  139. 	/*

    140. 

  140. 		Function: save

    141. 

  141. 		

    142. 

  142. 		Writes the current <graffiti->html> to the <DATA_FILE> when <graffiti->isValid>

    143. 

  143. 		or returns an error message.

    144. 

  144. 	*/

    145. 

  145. 	function save()

    146. 

  146. 	{

    147. 

  147. 		if ($this->isValid)

    148. 

  148. 		{

    149. 

  149. 			$rFile = @fopen(DATA_FILE,"a+");

    150. 

  150. 			if (!$rFile) {

    151. 

  151. 				return "ERROR: the graffiti data file could not be written to the " . dirname(realpath(DATA_FILE)) . " folder.";

    152. 

  152. 			}

    153. 

  153. 			fwrite($rFile, $this->html);

    154. 

  154. 			fclose($rFile);

    155. 

  155. 			return null;

    156. 

  156. 		}

    157. 

  157. 		else

    158. 

  158. 		{

    159. 

  159. 			return "Please supply both a handle and some graffiti to scribble on the wall.";

    160. 

  160. 		}

    161. 

  161. 	}

    162. 

  162. }

    163. 

  163. 

    164. 

  164. /*

    165. 

  165. 	Section: xajax request handlers

    166. 

  166. 	

    167. 

  167. 	Function: scribble

    168. 

  168. 	

    169. 

  169. 	Processes the users form input and passes the values to an instance

    170. 

  170. 	of the <graffiti> class.

    171. 

  171. 	

    172. 

  172. 	If the graffiti class generates and error, it is returned to the browser

    173. 

  173. 	using <xajax->alert>, otherwise, <xajax->script> is used to instruct the

    174. 

  174. 	browser to make a request to <updateWall> and <xajax->clear> is used to

    175. 

  175. 	clear the form input.

    176. 

  176. */

    177. 

  177. function scribble($aFormValues)

    178. 

  178. {

    179. 

  179. 	$sHandle = $aFormValues['handle'];

    180. 

  180. 	$sWords = $aFormValues['words'];

    181. 

  181. 	$objResponse = new xajaxResponse();

    182. 

  182. 	

    183. 

  183. 	$objGraffiti = new graffiti($sHandle,$sWords);

    184. 

  184. 	$sErrMsg = $objGraffiti->save();

    185. 

  185. 	if (!$sErrMsg)

    186. 

  186. 	{

    187. 

  187. 		$objResponse->script("xajax_updateWall();");

    188. 

  188. 		$objResponse->clear("words","value");

    189. 

  189. 	}

    190. 

  190. 	else

    191. 

  191. 		$objResponse->alert($sErrMsg);

    192. 

  192. 	

    193. 

  193. 	return $objResponse;

    194. 

  194. }

    195. 

  195. 

    196. 

  196. /*

    197. 

  197. 	Function: updateWall

    198. 

  198. 	

    199. 

  199. 	Processes the data previously written to the <DATA_FILE> by <graffiti->save>.

    200. 

  200. */

    201. 

  201. function updateWall()

    202. 

  202. {

    203. 

  203. 	$objResponse = new xajaxResponse();

    204. 

  204. 	

    205. 

  205. 	if (file_exists(DATA_FILE)) {

    206. 

  206. 		$aFile = @file(DATA_FILE);

    207. 

  207. 		if (!$aFile) {

    208. 

  208. 			$objResponse->addAlert("ERROR: the graffiti data file could not be written to the " . dirname(realpath(DATA_FILE)) . " folder.");

    209. 

  209. 			return $objResponse;

    210. 

  210. 		}

    211. 

  211. 		

    212. 

  212. 		$sHtmlSave = implode("\n",array_slice($aFile, -MAX_SCRIBBLES));

    213. 

  213. 		$sHtmlSave=str_replace("\n\n","\n",$sHtmlSave);

    214. 

  214. 	}

    215. 

  215. 	else {

    216. 

  216. 		$sHtmlSave = "";

    217. 

  217. 		$aFile = array();

    218. 

  218. 	}

    219. 

  219. 	$rFile = @fopen(DATA_FILE,"w+");

    220. 

  220. 	if (!$rFile) {

    221. 

  221. 		$objResponse->alert("ERROR: the graffiti data file could not be written to the " . dirname(realpath(DATA_FILE)) . " folder.");

    222. 

  222. 		return $objResponse;

    223. 

  223. 	}

    224. 

  224. 	fwrite($rFile, $sHtmlSave);

    225. 

  225. 	fclose($rFile);

    226. 

  226. 	

    227. 

  227. 	$sHtml = implode("\n",array_reverse(array_slice($aFile, -MAX_SCRIBBLES)));

    228. 

  228. 	

    229. 

  229. 	$objResponse->assign("theWall","innerHTML",$sHtml);

    230. 

  230. 

    231. 

  231. 	return $objResponse;

    232. 

  232. }

    233. 

  233. 

    234. 

  234. require("thewall.common.php");

    235. 

  235. $xajax->processRequest();

    236. 

  236. ?>
    237.