Added google chart

modules/gchart/classes/GoogleChart.php

@@ -0,0 +1,214 @@
+<?php defined('SYSPATH') or die('No direct access allowed.');
+
+/**
+ * This class provides access to Google's Chart API
+ *
+ * @package    lnApp
+ * @subpackage GoogleChart
+ * @category   Helper
+ * @author     Deon George
+ * @copyright  (c) 2010 Deon George
+ * @license    http://dev.leenooks.net/license.html
+ */
+abstract class GoogleChart implements Iterator,Countable {
+	// Hold the data for our chart
+	protected $_data = array();
+	protected $_axis = array();
+	private $_plotdata = array();
+	protected $_max = array();
+	// Chart title
+	protected $_title = '';
+	protected $_dataurl = '';
+	protected $_divname = '';
+	// Default chart size.
+	protected $_height = '200';
+	protected $_width = '700';
+
+	// Colors to use for series
+	private $series_colors = array('AAACCC','E0E0E0','CCC888','EEEBBB','666CCC','888888');
+
+	// Implementation Methods
+	public function count() {
+		return count($this->_plotdata);
+	}
+	public function current() {
+		return current($this->_plotdata);
+	}
+	public function key() {
+		return key($this->_plotdata);
+	}
+	public function next() {
+		return next($this->_plotdata);
+	}
+	public function rewind() {
+		reset($this->_plotdata);
+	}
+	public function valid() {
+		return key($this->_plotdata) ? TRUE : FALSE;
+	}
+
+	public function __call($name,$args) {
+		switch ($name) {
+			case 'dataurl': $this->_dataurl = array_shift($args);
+				break;
+			case 'div': $this->_divname = array_shift($args);
+				break;
+			case 'title': $this->_title = array_shift($args);
+				break;
+			default:
+				throw new Kohana_Exception('Unknown method :name',array(':name'=>$name));
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Render the URL that generates the graph
+	 */
+	final public function __toString() {
+		try {
+			return (string)$this->render();
+		} catch (Exception $e) {
+			echo Debug::vars($e);
+		}
+	}
+
+	/**
+	 * Pick the driver that will render the graph
+	 * @param $class The child class to invoke
+	 */
+	final public static function factory($class) {
+		$c = sprintf('%s_%s',get_called_class(),$class);
+
+		if (! class_exists($c))
+			throw new Kohana_Exception('Unknown Google Chart Type :class',array(':class'=>$class));
+		else
+			return new $c();
+	}
+
+	// Render the chart data in a json format
+	abstract public function json();
+
+	// Our child class should define how to render as a string
+	abstract public function render();
+
+	/**
+	 * Record one series of data
+	 * @param $axis Axis used and legend title, eg: (yr->"Right Y",yl->"Left Y")
+	 * @param $data Data for Axis in the format ("x label"=>value);
+	 *
+	 * Example:
+	 * $this->data('yl'=>'Base Down Peak',array('11-12'=>1,'11-11'=>2));
+	 */
+	public function sdata(array $axis,array $data) {
+		// Some sanity checking
+		if (count($axis) != 1)
+			throw new Kohana_Exception('We can only take 1 series at time.');
+
+		// This should only iterate once
+		foreach ($axis as $key => $l) {
+			if (! in_array($key,array('yr','yl')))
+				throw new Kohaan_Exception('Unknown AXIS :axis',array(':axis'=>$key));
+
+			$this->_axis[$l] = $key;
+			$this->_data[$l] = $data[$l];
+
+			// Upate our plot data
+			foreach ($data[$l] as $k=>$v)
+				$this->_plotdata[$k][$l] = $v;
+
+			ksort($this->_plotdata);
+
+			$this->_max[$l] = max($data[$l]);
+		}
+
+		return $this;
+	}
+
+	/**
+	 * Record on plot event
+	 * @param $data Should contain an "X" with a "YL" and/or "YR"
+	 */
+	public function pdata($x,array $data) {
+		if (! is_string($x))
+			throw new Kohana_Exception('X should be a string');
+
+		foreach ($data as $key => $values) {
+			switch ($key) {
+				case 'yr':
+				case 'yl':
+					foreach ($values as $k=>$v) {
+						if (! in_array($k,$this->_axis))
+							$this->_axis[$k] = $key;
+
+						$this->_data[$k][$x] = $v;
+						$this->_plotdata[$x][$k] = $v;
+					}
+
+					break;
+
+				default:
+					throw new Kohana_Exception('Unknown key :key',array(':key'=>$key));
+			}
+		}
+	}
+
+	/**
+	 * Return the colors that will be used for this series
+	 */
+	protected function seriescolors() {
+		return array_slice($this->series_colors,0,count($this->_axis));
+	}
+
+	/**
+	 * Render the chart data in a table format
+	 */
+	public function table($vertical=TRUE,$class=array()) {
+		if (! $this->_data)
+			return sprintf('<table><tr><td>%s</td></tr></table>',_('No Data'));
+
+		$output = sprintf('<table %s>',
+			isset($class['table']) ? $class['table'] : 'class="google-data-table"');
+
+		if ($vertical) {
+			$output .= '<tr>';
+			$output .= '<td>&nbsp;</td>';
+			foreach ($this->_axis as $l => $axis)
+				$output .= sprintf('<th style="text-align: right;">%s</th>',$l);
+
+			$output .= '</tr>';
+
+			foreach ($this as $k => $details) {
+				$output .= '<tr>';
+				$output .= sprintf('<th style="text-align: right;">%s</th>',$k);
+				foreach ($this->_axis as $l => $axis)
+					$output .= sprintf('<td style="text-align: right;">%s</td>',$details[$l]);
+				$output .= '</tr>';
+			}
+
+		// Horizontal table
+		} else {
+			$output .= '<tr>';
+			$output .= '<td>&nbsp;</td>';
+			foreach ($this as $k => $details)
+				$output .= sprintf('<th style="text-align: right;">%s</th>',$k);
+			$output .= '</tr>';
+
+			foreach ($this->_axis as $l => $axis) {
+				$output .= '<tr>';
+
+				$output .= sprintf('<th style="text-align: right;">%s</th>',$l);
+
+				foreach ($this as $k => $v)
+					$output .= sprintf('<td style="text-align: right;">%s</td>',$v[$l]);
+
+				$output .= '</tr>';
+			}
+		}
+
+		$output .= '</table>';
+
+		return $output;
+	}
+}
+?>