<?php

/**
 * Transforms FONT tags to the proper form (SPAN with CSS styling)
 *
 * This transformation takes the three proprietary attributes of FONT and
 * transforms them into their corresponding CSS attributes.  These are color,
 * face, and size.
 *
 * @note Size is an interesting case because it doesn't map cleanly to CSS.
 *       Thanks to
 *       http://style.cleverchimp.com/font_size_intervals/altintervals.html
 *       for reasonable mappings.
 * @warning This doesn't work completely correctly; specifically, this
 *          TagTransform operates before well-formedness is enforced, so
 *          the "active formatting elements" algorithm doesn't get applied.
 */
class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
{
    /**
     * @type string
     */
    public $transform_to = 'span';

    /**
     * @type array
     */
    protected $_size_lookup = array(
        '0' => 'xx-small',
        '1' => 'xx-small',
        '2' => 'small',
        '3' => 'medium',
        '4' => 'large',
        '5' => 'x-large',
        '6' => 'xx-large',
        '7' => '300%',
        '-1' => 'smaller',
        '-2' => '60%',
        '+1' => 'larger',
        '+2' => '150%',
        '+3' => '200%',
        '+4' => '300%'
    );

    /**
     * @param HTMLPurifier_Token_Tag $tag
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return HTMLPurifier_Token_End|string
     */
    public function transform($tag, $config, $context)
    {
        if ($tag instanceof HTMLPurifier_Token_End) {
            $new_tag = clone $tag;
            $new_tag->name = $this->transform_to;
            return $new_tag;
        }

        $attr = $tag->attr;
        $prepend_style = '';

        // handle color transform
        if (isset($attr['color'])) {
            $prepend_style .= 'color:' . $attr['color'] . ';';
            unset($attr['color']);
        }

        // handle face transform
        if (isset($attr['face'])) {
            $prepend_style .= 'font-family:' . $attr['face'] . ';';
            unset($attr['face']);
        }

        // handle size transform
        if (isset($attr['size'])) {
            // normalize large numbers
            if ($attr['size'] !== '') {
                if ($attr['size'][0] == '+' || $attr['size'][0] == '-') {
                    $size = (int)$attr['size'];
                    if ($size < -2) {
                        $attr['size'] = '-2';
                    }
                    if ($size > 4) {
                        $attr['size'] = '+4';
                    }
                } else {
                    $size = (int)$attr['size'];
                    if ($size > 7) {
                        $attr['size'] = '7';
                    }
                }
            }
            if (isset($this->_size_lookup[$attr['size']])) {
                $prepend_style .= 'font-size:' .
                    $this->_size_lookup[$attr['size']] . ';';
            }
            unset($attr['size']);
        }

        if ($prepend_style) {
            $attr['style'] = isset($attr['style']) ?
                $prepend_style . $attr['style'] :
                $prepend_style;
        }

        $new_tag = clone $tag;
        $new_tag->name = $this->transform_to;
        $new_tag->attr = $attr;

        return $new_tag;
    }
}

// vim: et sw=4 sts=4

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                        Request Example (guzzle)
                        

                        
                            
<?php
                            
 require_once('vendor/autoload.php');
                            
 $client = new \GuzzleHttp\Client();
                            
 $response = $client->request('POST', $base_url. 'v1/generate-token', [
                            
'headers' => [
                            
  'accept' => 'application/json',
                            
  'content-type' => 'application/json',
                            
 ],
                            
'form_params' => [
                            
  'client_id'     => '$client_id',
                            
  'secret_id'     => 'secret_id',
                            
  'env'           => 'env',
                            
  'merchant_id'   => 'merchant_id',
                            
 ],
                            
                            
]);
                            
echo $response->getBody();
                        
                    
                

                    
                        
**Response: SUCCESS (200 OK)**
                        
{
                        
 "message": {
                        
 "success": [
                        
  "Successfully token is generated"
                        
 ]
                        
},
                        
"data": {
                        
 "token":"eyJpdiI6InpkczhjTjhQdVhUL2lKQ0pSUUx6aUE9P
SIsInZhbHVlIjoiVGVBTVBDTXltbjNZcEIvdEJveGpTSno3TU5NRUtn
VkhCZ1pHTFNCUnZGQ2UxMnYxN202cEE1YVRDTEFsc0ZERExoTjdtL0dTL2x
oU3QzeUJJOExiMUx5T0w1L0llUXhTUkU1cWVLWEdEbEplb0dKNXcwbTNRM0
VxdkUwYzZuNFdtNkhMQ0pRZysyNWkvdzBxSlBoSVBSOGFTekNnR2RXNHVtc
G9lMGZOTmNCcm1hR3c5Sk9KTnB4Y3ltZDl6cm90MThrR21Ca3B1azc3bXRi
Q0J6SW96UVo1elNkU1ZqeE05bTcwWGp1MEUxWlJFdnNWTmpSbnVpeW92b2U
4dXZkUGgyb1VmK0luaGdyaFlsVTZlcVpVRnZlTG1DeFF6Ykk2T2h6Z3Jzbn
IyNHpNdHowSE5JdDR0Y0pZT20zUm1XYW8iLCJtYWMiOiJlY2M4NGE1OGUzYz
kzYzk0YzljNmVmNjE0YWI0ZDIwOGI3NDQ2YWEyY2ZhNzc0NzE4ZmY1ZmYyMz

                        IyZmQzNDY1IiwidGFnIjoiIn0=",
                        
},
                        
"type": "success"
                        
}
                    
                

                    
                        
**Response: ERROR (400 FAILED)**
                        
{
                        
 "message": {
                        
 "error": [
                        
  "Invalid credentials."
                        
 ]
                        
},
                        
"data": null,
                        
"type": "error"
                        
}