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units conversion app - needs some styling and code cleanup

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Friendika 2011-03-02 03:25:12 -08:00
parent b8740a0a9c
commit 6480fd73a7
4 changed files with 511 additions and 4 deletions
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283
addon/convert/UnitConvertor.php Normal file
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<?php
// +----------------------------------------------------------------------+
// | PHP version 4.0 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997, 1998, 1999, 2000, 2001 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Stanislav Okhvat <stanis@ngs.ru> |
// | Co-authored by : CVH, Chris Hansel <chris@cpi-service.com> |
// +----------------------------------------------------------------------+
//
// $Id: UnitConvertor.php,v 1.00 2002/02/20 11:40:00 stasokhvat Exp $
/**
* UnitConvertor is able to convert between different units and currencies.
*
* @author Stanislav Okhvat <stanis@sibfair.nsk.su, stanis@ngs.ru>
* @version $Id: UnitConvertor.php,v 1.00 2002/03/01 17:00:00 stasokhvat Exp $
* @package UnitConvertor
* @access public
* @history 01.03.2002 Implemented the code for regular and offset-based
* conversions
*
* 13.12.2004
* By Chris Hansel (CVH): changed getConvSpecs in order to have it look up
* intermediary conversions (also see comments in check_key).
*
* Intermediary conversions are useful when no conversion ratio is specified
* between two units when we calculate between the two. For example, we want
* to convert between Fahrenheit and Kelvin, and we have only
* specified how to convert Centigrade<->Fahrenheit and
* Centigrade<->Kelvin. While a direct (Fahrenheit->Kelvin) or
* reverse (Kelvin->Fahrenheit) lookups fail, looking for an intermediary
* unit linking the two (Centigrade) helps us do the conversion.
*
* 13.12.2004
* Chris Hansel (CVH): $to_array argument of addConversion method can now
* contain units as 'unit1/unit2/unit3', when all units stand for the same
* thing. See examples in unitconv.php
*/
class UnitConvertor
{
/**
* Stores conversion ratios.
*
* @var array
* @access private
*/
var $conversion_table = array();
/**
* Decimal point character (default is "." - American - set in constructor).
*
* @var string
* @access private
*/
var $decimal_point;
/**
* Thousands separator (default is "," - American - set in constructor).
*
* @var string
* @access private
*/
var $thousand_separator;
/**
* For future use
*
* @var array
* @access private
*/
var $bases = array();
/**
* Constructor. Initializes the UnitConvertor object with the most important
* properties.
*
* @param string decimal point character
* @param string thousand separator character
* @return void
* @access public
*/
function UnitConvertor($dec_point = '.', $thousand_sep = ',')
{
$this->decimal_point = $dec_point;
$this->thousand_separator = $thousand_sep;
} // end func UnitConvertor
/**
* Adds a conversion ratio to the conversion table.
*
* @param string the name of unit from which to convert
* @param array array(
* "pound"=>array("ratio"=>'', "offset"=>'')
* )
* "pound" - name of unit to set conversion ration to
* "ratio" - 'double' conversion ratio which, when
* multiplied by the number of $from_unit units produces
* the result
* "offset" - an offset from 0 which will be added to
* the result when converting (needed for temperature
* conversions and defaults to 0).
* @return boolean true if successful, false otherwise
* @access public
*/
function addConversion($from_unit, $to_array)
{
if (!isset($this->conversion_table[$from_unit])) {
while(list($key, $val) = each($to_array))
{
if (strstr($key, '/'))
{
$to_units = explode('/', $key);
foreach ($to_units as $to_unit)
{
$this->bases[$from_unit][] = $to_unit;
if (!is_array($val))
{
$this->conversion_table[$from_unit."_".$to_unit] = array("ratio"=>$val, "offset"=>0);
}
else
{
$this->conversion_table[$from_unit."_".$to_unit] =
array(
"ratio"=>$val['ratio'],
"offset"=>(isset($val['offset']) ? $val['offset'] : 0)
);
}
}
}
else
{
$this->bases[$from_unit][] = $key;
if (!is_array($val))
{
$this->conversion_table[$from_unit."_".$key] = array("ratio"=>$val, "offset"=>0);
}
else
{
$this->conversion_table[$from_unit."_".$key] =
array(
"ratio"=>$val['ratio'],
"offset"=>(isset($val['offset']) ? $val['offset'] : 0)
);
}
}
}
return true;
}
return false;
} // end func addConversion
/**
* Converts from one unit to another using specified precision.
*
* @param double value to convert
* @param string name of the source unit from which to convert
* @param string name of the target unit to which we are converting
* @param integer double precision of the end result
* @return void
* @access public
*/
function convert($value, $from_unit, $to_unit, $precision)
{
if ($this->getConvSpecs($from_unit, $to_unit, $value, $converted ))
{
return number_format($converted , (int)$precision, $this->decimal_point, $this->thousand_separator);
} else {
return false;
}
} // end func
/**
* CVH : changed this Function getConvSpecs in order to have it look up
* intermediary Conversions from the
* "base" unit being that one that has the highest hierarchical order in one
* "logical" Conversion_Array
* when taking $conv->addConversion('km',
* array('meter'=>1000, 'dmeter'=>10000, 'centimeter'=>100000,
* 'millimeter'=>1000000, 'mile'=>0.62137, 'naut.mile'=>0.53996,
* 'inch(es)/zoll'=>39370, 'ft/foot/feet'=>3280.8, 'yd/yard'=>1093.6));
* "km" would be the logical base unit for all units of dinstance, thus,
* if the function fails to find a direct or reverse conversion in the table
* it is only logical to suspect that if there is a chance
* converting the value it only is via the "base" unit, and so
* there is not even a need for a recursive search keeping the perfomance
* acceptable and the ressource small...
*
* CVH check_key checks for a key in the Conversiontable and returns a value
*/
function check_key( $key) {
if ( array_key_exists ($key,$this->conversion_table)) {
if (! empty($this->conversion_table[$key])) {
return $this->conversion_table[$key];
}
}
return false;
}
/**
* Key function. Finds the conversion ratio and offset from one unit to another.
*
* @param string name of the source unit from which to convert
* @param string name of the target unit to which we are converting
* @param double conversion ratio found. Returned by reference.
* @param double offset which needs to be added (or subtracted, if negative)
* to the result to convert correctly.
* For temperature or some scientific conversions,
* i.e. Fahrenheit -> Celcius
* @return boolean true if ratio and offset are found for the supplied
* units, false otherwise
* @access private
*/
function getConvSpecs($from_unit, $to_unit, $value, &$converted)
{
$key = $from_unit."_".$to_unit;
$revkey = $to_unit."_".$from_unit;
$found = false;
if ($ct_arr = $this->check_key($key)) {
// Conversion Specs found directly
$ratio = (double)$ct_arr['ratio'];
$offset = $ct_arr['offset'];
$converted = (double)(($value * $ratio)+ $offset);
return true;
} // not found in direct order, try reverse order
elseif ($ct_arr = $this->check_key($revkey)) {
$ratio = (double)(1/$ct_arr['ratio']);
$offset = -$ct_arr['offset'];
$converted = (double)(($value + $offset) * $ratio);
return true;
} // not found test for intermediary conversion
else {
// return ratio = 1 if keyparts match
if ($key == $revkey) {
$ratio = 1;
$offset = 0;
$converted = $value;
return true;
}
// otherwise search intermediary
reset($this->conversion_table);
while (list($convk, $i1_value) = each($this->conversion_table)) {
// split the key into parts
$keyparts = preg_split("/_/",$convk);
// return ratio = 1 if keyparts match
// Now test if either part matches the from or to unit
if ($keyparts[1] == $to_unit && ($i2_value = $this->check_key($keyparts[0]."_".$from_unit))) {
// an intermediary $keyparts[0] was found
// now let us put things together intermediary 1 and 2
$converted = (double)(((($value - $i2_value['offset']) / $i2_value['ratio']) * $i1_value['ratio'])+ $i1_value['offset']);
$found = true;
} elseif ($keyparts[1] == $from_unit && ($i2_value = $this->check_key($keyparts[0]."_".$to_unit))) {
// an intermediary $keyparts[0] was found
// now let us put things together intermediary 2 and 1
$converted = (double)(((($value - $i1_value['offset']) / $i1_value['ratio']) + $i2_value['offset']) * $i2_value['ratio']);
$found = true;
}
}
return $found;
}
} // end func getConvSpecs
} // end class UnitConvertor
?>

223
addon/convert/convert.php Normal file
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<?php
function convert_install() {
register_hook('app_menu', 'addon/convert/convert.php', 'convert_app_menu');
}
function convert_uninstall() {
unregister_hook('app_menu', 'addon/convert/convert.php', 'convert_app_menu');
}
function convert_app_menu($a,&$b) {
$b['app_menu'] .= '<div class="app-title"><a href="convert">Units Conversion</a></div>';
}
function convert_module() {}
function convert_content($app) {
include("UnitConvertor.php");
class TP_Converter extends UnitConvertor {
function TP_Converter($lang = "en")
{
if ($lang != 'en' ) {
$dec_point = '.'; $thousand_sep = "'";
} else {
$dec_point = '.'; $thousand_sep = ",";
}
$this->UnitConvertor($dec_point , $thousand_sep );
} // end func UnitConvertor
function find_base_unit($from,$to) {
while (list($skey,$sval) = each($this->bases)) {
if ($skey == $from || $to == $skey || in_array($to,$sval) || in_array($from,$sval)) {
return $skey;
}
}
return false;
}
function getTable($value, $from_unit, $to_unit, $precision) {
if ($base_unit = $this->find_base_unit($from_unit,$to_unit)) {
// A baseunit was found now lets convert from -> $base_unit
$cell ['value'] = $this->convert($value, $from_unit, $base_unit, $precision)." ".$base_unit;
$cell ['class'] = ($base_unit == $from_unit || $base_unit == $to_unit) ? "framedred": "";
$cells[] = $cell;
// We now have the base unit and value now lets produce the table;
while (list($key,$val) = each($this->bases[$base_unit])) {
$cell ['value'] = $this->convert($value, $from_unit, $val, $precision)." ".$val;
$cell ['class'] = ($val == $from_unit || $val == $to_unit) ? "framedred": "";
$cells[] = $cell;
}
$cc = count($cells);
$string = "<table class=\"framed grayish\" border=\"1\" cellpadding=\"5\" width=\"80%\" align=\"center\"><tr>";
$string .= "<td rowspan=\"$cc\" align=\"center\">$value $from_unit</td>";
$i=0;
foreach ($cells as $cell) {
if ($i==0) {
$string .= "<td class=\"".$cell['class']."\">".$cell['value']."</td>";
$i++;
} else {
$string .= "</tr><tr><td class=\"".$cell['class']."\">".$cell['value']."</td>";
}
}
$string .= "</tr></table>";
return $string;
}
}
}
$conv = new TP_Converter('en');
$conversions = array(
'Temperature'=>array('base' =>'Celsius',
'conv'=>array(
'Fahrenheit'=>array('ratio'=>1.8, 'offset'=>32),
'Kelvin'=>array('ratio'=>1, 'offset'=>273),
'Reaumur'=>0.8
)
),
'Weight' => array('base' =>'kg',
'conv'=>array(
'g'=>1000,
'mg'=>1000000,
't'=>0.001,
'grain'=>15432,
'oz'=>35.274,
'lb'=>2.2046,
'cwt(UK)' => 0.019684,
'cwt(US)' => 0.022046,
'ton (US)' => 0.0011023,
'ton (UK)' => 0.0009842
)
),
'Distance' => array('base' =>'km',
'conv'=>array(
'm'=>1000,
'dm'=>10000,
'cm'=>100000,
'mm'=>1000000,
'mile'=>0.62137,
'naut.mile'=>0.53996,
'inch(es)'=>39370,
'ft'=>3280.8,
'yd'=>1093.6,
'furlong'=>4.970969537898672,
'fathom'=>546.8066491688539
)
),
'Area' => array('base' =>'km 2',
'conv'=>array(
'ha'=>100,
'acre'=>247.105,
'm 2'=>pow(1000,2),
'dm 2'=>pow(10000,2),
'cm 2'=>pow(100000,2),
'mm 2'=>pow(1000000,2),
'mile 2'=>pow(0.62137,2),
'naut.miles 2'=>pow(0.53996,2),
'in 2'=>pow(39370,2),
'ft 2'=>pow(3280.8,2),
'yd 2'=>pow(1093.6,2),
)
),
'Volume' => array('base' =>'m 3',
'conv'=>array(
'in 3'=>61023.6,
'ft 3'=>35.315,
'cm 3'=>pow(10,6),
'dm 3'=>1000,
'litre'=>1000,
'hl'=>10,
'yd 3'=>1.30795,
'gal(US)'=>264.172,
'gal(UK)'=>219.969,
'pint' => 2113.376,
'quart' => 1056.688,
'cup' => 4266.753,
'fl oz' => 33814.02,
'tablespoon' => 67628.04,
'teaspoon' => 202884.1,
'pt (UK)'=>1000/0.56826,
'barrel petroleum'=>1000/158.99,
'Register Tons'=>2.832,
'Ocean Tons'=>1.1327
)
),
'Speed' =>array('base' =>'kmph',
'conv'=>array(
'mps'=>0.0001726031,
'milesph'=>0.62137,
'knots'=>0.53996,
'mach STP'=>0.0008380431,
'c (warp)'=>9.265669e-10
)
)
);
while (list($key,$val) = each($conversions)) {
$conv->addConversion($val['base'], $val['conv']);
$list[$key][] = $val['base'];
while (list($ukey,$uval) = each($val['conv'])) {
$list[$key][] = $ukey;
}
}
$o .= '<h3>Unit Conversions</h3>';
if (isset($_POST['from_unit']) && isset($_POST['value'])) {
$_POST['value'] = $_POST['value'] + 0;
$o .= ($conv->getTable($_POST['value'], $_POST['from_unit'], $_POST['to_unit'], 5))."</p>";
} else {
$o .= "<p>Select:</p>";
}
if(isset($_POST['value']))
$value = $_POST['value'];
else
$value = '';
$o .= '<form action="convert" method="post" name="conversion">';
$o .= '<input name="value" type="text" id="value" value="' . $value . '" size="10" maxlength="10" />';
$o .= '<select name="from_unit" size="12">';
reset($list);
while(list($key,$val) = each($list)) {
$o .= "\n\t<optgroup label=\"$key\">";
while(list($ukey,$uval) = each($val)) {
$selected = (($uval == $_POST['from_unit']) ? ' selected="selected" ' : '');
$o .= "\n\t\t<option value=\"$uval\" $selected >$uval</option>";
}
$o .= "\n\t</optgroup>";
}
$o .= '</select>';
$o .= '<input type="submit" name="Submit" value="Submit" /></form>';
return $o;
}

7
include/dba.php
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@ -113,13 +113,14 @@ function printable($s) {
if(! function_exists('dbg')) {
function dbg($state) {
global $db;
if($db)
$db->dbg($state);
}}
if(! function_exists('dbesc')) {
function dbesc($str) {
global $db;
if($db->connected)
if($db && $db->connected)
return($db->escape($str));
else
return(str_replace("'","\\'",$str));
@ -138,7 +139,7 @@ function q($sql) {
$args = func_get_args();
unset($args[0]);
if($db->connected) {
if($db && $db->connected) {
$ret = $db->q(vsprintf($sql,$args));
return $ret;
}
@ -165,7 +166,7 @@ if(! function_exists('dbq')) {
function dbq($sql) {
global $db;
if($db->connected)
if($db && $db->connected)
$ret = $db->q($sql);
else
$ret = false;

2
include/nav.php
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@ -82,7 +82,7 @@ function nav(&$a) {
*
*/
if(x($_SESSION,'uid')) {
if(local_user()) {
$a->page['nav'] .= '<a id="nav-network-link" class="nav-commlink" href="network">' . t('Network')
. '</a><span id="net-update" class="nav-ajax-left"></span>' . "\r\n";