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144 lines
3.3 KiB
144 lines
3.3 KiB
<?php
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// thewall.php, thewall.common.php, thewall.server.php
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// demonstrate a demonstrates a xajax implementation of a graffiti wall
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// using xajax version 0.2
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// http://xajaxproject.org
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if (!defined ('MAX_SCRIBBLES'))
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{
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define ('MAX_SCRIBBLES', 5);
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}
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if (!defined ('DATA_FILE'))
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{
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define ('DATA_FILE', "thewall.dta");
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}
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class graffiti
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{
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var $html;
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var $isValid = false;
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function graffiti($sHandle, $sWords)
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{
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if (trim($sHandle) == "" || trim($sWords) == "")
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{
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return;
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}
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$this->html = "\n<div style=\"font-weight: bold;text-align:".$this->getRandomAlignment();
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$this->html .= ";color:".$this->getRandomColor().";\">";
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$this->html .= "<span style=\"font-size:".$this->getRandomFontSize()."%;\">";
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$this->html .= strip_tags(stripslashes($sWords));
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$this->html .= "</span><br/><span style=\"font-size: small;\">";
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$this->html .= " ~ ".strip_tags(stripslashes($sHandle))." ".date("m/d/Y H:i:s")."</span></div>";
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$this->isValid = true;
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}
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function getRandomFontSize()
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{
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srand((double)microtime()*1000003);
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return rand(100,300);
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}
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function getRandomColor()
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{
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$sColor = "rgb(";
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srand((double)microtime()*1000003);
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$sColor .= rand(0,255).",";
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srand((double)microtime()*1000003);
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$sColor .= rand(0,255).",";
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$sColor .= rand(0,255).")";
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return $sColor;
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}
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function getRandomAlignment()
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{
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$sAlign = "";
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srand((double)microtime()*1000003);
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$textAlign = rand(0,2);
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switch($textAlign)
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{
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case 0: $sAlign = "left"; break;
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case 1: $sAlign = "right"; break;
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case 2: $sAlign = "center"; break;
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}
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return $sAlign;
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}
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function save()
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{
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if ($this->isValid)
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{
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$rFile = @fopen(DATA_FILE,"a+");
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if (!$rFile) {
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return "ERROR: the graffiti data file could not be written to the " . dirname(realpath(DATA_FILE)) . " folder.";
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}
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fwrite($rFile, $this->html);
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fclose($rFile);
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return null;
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}
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else
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{
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return "Please supply both a handle and some graffiti to scribble on the wall.";
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}
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}
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}
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function scribble($aFormValues)
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{
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$sHandle = $aFormValues['handle'];
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$sWords = $aFormValues['words'];
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$objResponse = new xajaxResponse();
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$objGraffiti = new graffiti($sHandle,$sWords);
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$sErrMsg = $objGraffiti->save();
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if (!$sErrMsg)
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{
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$objResponse->addScript("xajax_updateWall();");
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$objResponse->addClear("words","value");
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}
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else
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$objResponse->addAlert($sErrMsg);
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return $objResponse;
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}
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function updateWall()
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{
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$objResponse = new xajaxResponse();
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if (file_exists(DATA_FILE)) {
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$aFile = @file(DATA_FILE);
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if (!$aFile) {
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$objResponse->addAlert("ERROR: the graffiti data file could not be written to the " . dirname(realpath(DATA_FILE)) . " folder.");
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return $objResponse;
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}
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$sHtmlSave = implode("\n",array_slice($aFile, -MAX_SCRIBBLES));
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$sHtmlSave=str_replace("\n\n","\n",$sHtmlSave);
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}
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else {
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$sHtmlSave = "";
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$aFile = array();
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}
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$rFile = @fopen(DATA_FILE,"w+");
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if (!$rFile) {
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$objResponse->addAlert("ERROR: the graffiti data file could not be written to the " . dirname(realpath(DATA_FILE)) . " folder.");
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return $objResponse;
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}
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fwrite($rFile, $sHtmlSave);
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fclose($rFile);
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$sHtml = implode("\n",array_reverse(array_slice($aFile, -MAX_SCRIBBLES)));
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$objResponse->addAssign("theWall","innerHTML",$sHtml);
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return $objResponse;
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}
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require("thewall.common.php");
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$xajax->processRequests();
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?>
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