File: vendor/jackbooted/html/GoogleChartAPI.php

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File: vendor/jackbooted/html/GoogleChartAPI.php
Role: Class source
Content type: text/plain
Description: Class source
Class: JackBooted PHP Framework
Web application framework using simplified MVC
Author: By
Last change:
Date: 4 years ago
Size: 2,463 bytes
 

 

Contents

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<?php
namespace Jackbooted\Html;

/**
 * Wrapper for Google Charts API
 * @copyright Confidential and copyright (c) 2016 Jackbooted Software. All rights reserved.
 *
 * Written by Brett Dutton of Jackbooted Software
 * brett at brettdutton dot com
 *
 * This software is written and distributed under the GNU General Public
 * License which means that its source code is freely-distributed and
 * available to the general public.
 *
 * http://code.google.com/apis/chart/docs/gallery/bar_charts.html
 * http://code.google.com/apis/chart/docs/chart_params.html
 */
class GoogleChartAPI extends \Jackbooted\Util\JB {
    private static
$URL;

    public static function
init () {
        if ( isset (
$_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] == 'on' ) {
           
self::$URL = 'https://chart.googleapis.com/chart?';
        }
        else {
           
self::$URL = 'http://chart.googleapis.com/chart?';
        }
    }

    public static function
create () {
        return new
GoogleChartAPI ();
    }

    private
$params = array ();

    public function
__construct () {
    }

    public function
add ( $key, $value ) {
       
$this->params[$key] = $value;
        return
$this;
    }

    public function
autoValues ( /* var args */ ) {
       
$allValues = func_get_args ();
       
$combinedList = array ();
        foreach (
$allValues as $values ) {
           
$combinedList = array_merge ( $values, $combinedList );
        }

       
$max = (int)ceil ( max ( $combinedList ) );
       
$min = (int)floor ( min ( $combinedList ) );
       
$range = $max - $min;
        if (
abs ( $range ) < 0.00001 ) {
           
$min = 0;
           
$range = $max - $min;
            if (
abs ( $range ) < 0.00001 ) {
                return
false;
            }
        }

       
$valuesStrings = array ();
        foreach (
$allValues as $values ) {
            foreach (
$values as $idx => $val ) {
               
$values[$idx] = (int)( ( $values[$idx] - $min ) * 100.0 / $range );
            }
           
$valuesStrings[] = join ( ',', $values );
        }

       
$step = $range / 5.0;
        if (
$step > 3 ) $step = (int)floor ( $step );

        return
$this->add ( 'chxr', "1,{$min},{$max},{$step}" )
                    ->
add ( 'chg', '0,10' )
                    ->
add ( 'chd', 't:' . join ( '|', $valuesStrings ) );

    }

    public function
__toString () {
        return
Tag::img ( self::$URL . http_build_query ( $this->params ) );
    }
}


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