Current File : //data/www_bck/varak.net_bck/gnufm.varak.net/data/Graph.php
<?php
/* GNU FM -- a free network service for sharing your music listening habits
Copyright (C) 2009 Free Software Foundation, Inc
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
require_once($install_path . '/database.php');
require_once($install_path . '/data/Artist.php');
require_once($install_path . '/data/Album.php');
require_once($install_path . '/data/Server.php');
require_once($install_path . '/data/Statistic.php');
/**
* Represents graph object, extended for specific implementations, currently
* acts as a data only object but intention is to delegate as much functionality
* with respect to the propagation of the graph objects themselves to this
* class. Many methods are, therefore, included with this view in mind.
*
* @see GraphTypes.php for implementations
**/
class Graph {
public $data, $data_buffer;
public $user, $type, $renderer, $label_renderer;
public $max_x_axis, $max_y_axis;
public $tick_interval = 20;
public $x_axis_label = 'X axis', $y_axis_label = 'Y Axis';
/* Multidimensional array to allow for multiple series of data. */
protected $graph_types = array(array());
public static $DEFAULT_GRAPH_TYPE = 0;
function __construct($user = null, $type = null) {
$this->user = $user;
$this->resetData();
/* @todo: iterate through $type to determine renderer requirements */
switch($type){}
}
/**
* Resets internal data object.
**/
protected function resetData() {
$this->data = array(array(array()));
}
/**
* Returns the graph renderer as defined at object instantiation.
**/
public function getGraphRenderer() {
return $this->graph_types[$this->renderer];
}
/**
* Returns x-axis label.
**/
public function getXAxis() {
return $this->x_axis_label;
}
/**
* Returns y-axis label.
**/
public function getYAxis() {
return $this->y_axis_label;
}
/**
* Sets the axes labels of the current object.
* @param $x = x-axis label.
* @param $y = y-axis label.
**/
public function setAxisLabels($x = NULL, $y = NULL)
{
$this->x_axis_label = ($x === NULL) ? $this->x_axis_label : $x;
$this->y_axis_label = ($y === NULL) ? $this->y_axis_label : $y;
}
/**
* Returns the JS array built from the internal data respresentation, not
* used at present by used to hide the internal building method.
* @return String JS array.
* @see buildJsDataArray().
**/
public function getJsDataArray() {
return $this->buildJsDataArray();
}
/**
* Sets the internal data source to a new object.
* @param $data = new data object for the Graph
**/
public function setDataSource($data = NULL)
{
if (($data === NULL) && (! isEmpty($data))) return;
$this->data = $data;
}
/**
* Sets the maximum value of x-axis, both the maximum, rounded value of the
* x-axis ticks and also determining a round, suitable tick interval.
*/
protected function setMaxX($raw)
{
$this->max_x_axis = round($raw + 100, -2);
$this->tick_interval = ($this->max_x_axis / 10);
}
/**
* Iterates through the multi-dimensional array $data to create a string
* JS array representation of multiple series of data for the Graph object.
* @param $inverse Boolean TRUE if data is being represented horizontally.
* @return String JS multi-dimensional array.
**/
protected function buildJsDataArray($inverse = FALSE) {
$temp = '[';
foreach ($this->data as $i => $series)
{
$temp .= '[';
if ($inverse) $i = 0;
foreach ($series as $j => $set)
{
foreach ($set as $k => $node)
{
/* Determine if the node is numeric, if not, escape. */
$temp .= '['.((! is_numeric($node))
? '\''.addslashes($node).'\''
: $node);
/* @TODO: check $node for len > 1, if so tokenise string */
if ($inverse) $temp .= ',' . ++$i;
$temp .= '],';
}
$temp = rtrim($temp, ',');
}
$temp .= '],';
}
$temp = rtrim($temp, ',');
$temp .= ']';
return $temp;
}
protected function buildJsSingleArray($source) {
$temp = '[';
foreach ($source as $i => $node)
{
$temp .= ((! is_numeric($node)) ? '\''.$node.'\'' : $node) . ',';
}
$temp = rtrim($temp, ',') . ']';
return $temp;
}
}
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