<?php
/**
 * Drum automatically generates tags TITLE, KEYWORDS and DESCRIPTION for each 
 * page.  This should be used with header3 . php or a similar script of your making.
 * 
 * @version 3
 * @author Mark Valentine
 * @author Kekoa Vincent
 */

class Drum {
	/**
	 * The title of the page
	 *
	 * @var string
	 */
	private static $title;
	
	/**
	 * The name of the company
	 *
	 * @var string
	 */
	private static $companyName;
	
	/**
	 * The location of the company
	 *
	 * @var string
	 */
	private static $location;
	
	/**
	 * The industry of the company
	 *
	 * @var string
	 */
	private static $industry;
	
	/**
	 * The services provided by the company
	 *
	 * @var string
	 */
	private static $services;
	
	/**
	 * The default title that will appear if no title is set.  Useful for a site-
	 * wide default.
	 *
	 * @var string
	 */
	private static $defaultTitle;
	
	/**
	 * Text that will appear at the beginning of the title
	 *
	 * @var string
	 */
	private static $titleTail;
	
	/**
	 * Text that will appear at the end of the title
	 *
	 * @var string
	 */
	private static $titleHead;
	
	/**
	 * Sets an attribute for drum to a value
	 *
	 * @param string $attrName The name of the attribute
	 * @param string $attrValue The new value of the attribute
	 */
	public static function SetAttribute($attrName, $attrValue) {
//		echo "$attrName set";
		self::${$attrName} = $attrValue;
	}
	
	/**
	 * Sets the default title to be used if no title is set.
	 *
	 * @param string $defaultTitle
	 */
	public static function SetDefaultTitle($defaultTitle) {
		self::SetAttribute('defaultTitle', $defaultTitle);
	}
	
	/**
	 * Sets the title
	 *
	 * @param string $title
	 */
	public static function SetTitle($title) {
		self::SetAttribute('title', $title);
	}
	
	/**
	 * Sets the title head which will appear at the beginning of the generated
	 * title.
	 *
	 * @param string $title
	 */
	public static function SetTitleHead($titleHead) {
		self::SetAttribute('titleHead', $titleHead);
	}
	
	/**
	 * Sets the title tail which will appear at the end of the generated title
	 *
	 * @param string $title
	 */
	public static function SetTitleTail($titleTail) {
		self::SetAttribute('titleTail', $titleTail);
	}
	
	/**
	 * Sets the location using an array or a comma-separated list
	 *
	 * @param array|string $location
	 */
	public static function SetLocation($location) {
		self::SetAttribute('location', self::MakeArray($location));
	}
	
	/**
	 * Sets the indstry
	 *
	 * @param string $industry
	 */
	public static function SetIndustry($industry) {
		self::SetAttribute('industry', $industry);
	}
	
	/**
	 * Sets the name of the company
	 *
	 * @param string $companyName
	 */
	public static function SetCompanyName($companyName) {
		self::SetAttribute('companyName', $companyName);
	}
	
	/**
	 * Sets the services
	 *
	 * @param array $services
	 */
	public static function SetServices($services) {
		self::SetAttribute('services', self::MakeArray($services));
	}
	
	/**
	 * If the input is an array, it is passed through, if not, an array is created
	 * assuming the input is a comma-separated list of values.
	 *
	 * @param mixed $inputValue 
	 * @return array
	 */
	private static function MakeArray($inputValue) {
		if(is_array($inputValue)) {
			$newValue =& $inputValue;
		} else {
			$newValue = explode(",", $inputValue);
			
			foreach($newValue as $key => $value) {
				$newValue[$key] = trim($value);
			}
		}
		
		return $newValue;
	}
	
	/**
	 * Turns the input into a string... mainly converts array to string format,
	 * separated by commas
	 *
	 * @param mixed $inputValue
	 * @return string
	 */
	private static function MakeString($inputValue) {
		if(is_string($inputValue)) {
			$newValue =& $inputValue;
		} else if(is_array($inputValue)) {
			$newValue = implode(", ", $inputValue);
		}
		
		return $newValue;
	}
	
	/**
	 * Generates and outputs the title
	 *
	 */
	public static function PrintTitle()
	{
		echo self::GetTitle();
	}
	
	/**
	 * Generates the title.  If the title is specifically set, it will display 
	 * that title, otherwise it will use the default, or if none is set, it will
	 * output the name:industry
	 *
	 * @return string
	 */
	public static function GetTitle() {
		if(self::$title != "") {
			$output = self::$title;
		} else if(self::$defaultTitle != "") {
			$output = self::$defaultTitle;
		} else {
			$output = self::$companyName . ": " . self::MakeString(self::$industry);
		}
		
		return self::$titleHead . $output . self::$titleTail;
	}
	
	/**
	 * Generates and outputs the meta keywords
	 *
	 */
	function PrintKeywords() {
		echo self::GetKeywords();
	}
	
	/**
	 * Generates the keywords based on variables given
	 *
	 * @return string
	 */
	public static function GetKeywords() {
		$keywords = "";
		for($locItr=0; $locItr<count(self::$location); $locItr++)
		{
			for($servItr=0; $servItr<count(self::$services); $servItr++)
			{
				$keywords .= self::$location[$locItr] . " " . self::$services[$servItr] . ", ";
			}
		}
		$keywords .= self::$industry;
		
		return $keywords;
	}
	
	/**
	 * Generates and outputs meta description
	 *
	 */
	public static function PrintDescription()
	{
		echo self::GetDescription();
	}
	
	/**
	 * Generates the meta description from variables given
	 *
	 * @return string
	 */
	public static function GetDescription() {
		$description = self::$companyName . ": ";
		$description .= self::$industry . " ";
		$description .= "providing ";
		$servItr=0;
		for($servItr; $servItr<count(self::$services)-1; $servItr++)
		{
			$description .= self::$services[$servItr] . ", ";
		}
		$description .= "and " . self::$services[$servItr];
		$description .= " to ";
		$locItr = 0;
		for($locItr; $locItr<count(self::$location)-1; $locItr++)
		{
			$description .= self::$location[$locItr] . ", ";
		}
		$description .= "and " . self::$location[$locItr];
		
		return $description;
	}
}

?>