Include Datamapper ORM
This commit is contained in:
Karsten Heiken
220
application/datamapper/json.php
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220
application/datamapper/json.php
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<?php
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/**
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* Json Extension for DataMapper classes.
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*
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* Quickly convert DataMapper models to-and-from JSON syntax.
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*
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* @license MIT License
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* @package DMZ-Included-Extensions
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* @category DMZ
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* @author Phil DeJarnett
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* @link http://www.overzealous.com/dmz/pages/extensions/json.html
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* @version 1.1
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*/
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// --------------------------------------------------------------------------
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/**
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* DMZ_Json Class
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*
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* @package DMZ-Included-Extensions
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*/
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class DMZ_Json {
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/**
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* Convert a DataMapper model into JSON code.
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*
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* @param DataMapper $object The DataMapper Object to convert
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* @param array $fields Array of fields to include. If empty, includes all database columns.
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* @param boolean $pretty_print Format the JSON code for legibility.
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* @return string A JSON formatted String, or FALSE if an error occurs.
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*/
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public function to_json($object, $fields = '', $pretty_print = FALSE)
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{
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if(empty($fields))
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{
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$fields = $object->fields;
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}
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$result = array();
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foreach($fields as $f)
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{
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$result[$f] = $object->{$f};
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}
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$json = json_encode($result);
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if($json === FALSE)
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{
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return FALSE;
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}
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if($pretty_print)
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{
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$json = $this->_json_format($json);
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}
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return $json;
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}
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/**
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* Convert the entire $object->all array result set into JSON code.
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*
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* @param DataMapper $object The DataMapper Object to convert
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* @param array $fields Array of fields to include. If empty, includes all database columns.
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* @param boolean $pretty_print Format the JSON code for legibility.
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* @return string A JSON formatted String, or FALSE if an error occurs.
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*/
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public function all_to_json($object, $fields = '', $pretty_print = FALSE)
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{
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if(empty($fields))
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{
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$fields = $object->fields;
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}
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$result = array();
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foreach($object as $o)
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{
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$temp = array();
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foreach($fields as $f)
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{
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$temp[$f] = $o->{$f};
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}
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$result[] = $temp;
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}
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$json = json_encode($result);
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if($json === FALSE)
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{
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return FALSE;
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}
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if($pretty_print)
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{
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$json = $this->_json_format($json);
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}
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return $json;
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}
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/**
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* Convert a JSON object back into a DataMapper model.
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*
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* @param DataMapper $object The DataMapper Object to save to.
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* @param string $json_code A string that contains JSON code.
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* @param array $fields Array of 'safe' fields. If empty, only include the database columns.
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* @return bool TRUE or FALSE on success or failure of converting the JSON string.
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*/
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public function from_json($object, $json_code, $fields = '')
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{
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if(empty($fields))
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{
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$fields = $object->fields;
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}
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$data = json_decode($json_code);
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if($data === FALSE)
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{
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return FALSE;
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}
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foreach($data as $k => $v) {
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if(in_array($k, $fields))
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{
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$object->{$k} = $v;
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}
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}
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return TRUE;
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}
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/**
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* Sets the HTTP Content-Type header to application/json
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*
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* @param DataMapper $object
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*/
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public function set_json_content_type($object)
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{
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$CI =& get_instance();
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$CI->output->set_header('Content-Type: application/json');
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}
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/**
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* Formats a JSON string for readability.
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*
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* From @link http://php.net/manual/en/function.json-encode.php
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*
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* @param string $json Unformatted JSON
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* @return string Formatted JSON
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*/
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private function _json_format($json)
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{
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$tab = " ";
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$new_json = "";
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$indent_level = 0;
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$in_string = false;
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$json_obj = json_decode($json);
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if($json_obj === false)
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return false;
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$json = json_encode($json_obj);
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$len = strlen($json);
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for($c = 0; $c < $len; $c++)
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{
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$char = $json[$c];
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switch($char)
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{
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case '{':
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case '[':
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if(!$in_string)
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{
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$new_json .= $char . "\n" . str_repeat($tab, $indent_level+1);
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$indent_level++;
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}
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else
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{
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$new_json .= $char;
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}
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break;
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case '}':
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case ']':
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if(!$in_string)
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{
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$indent_level--;
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$new_json .= "\n" . str_repeat($tab, $indent_level) . $char;
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}
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else
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{
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$new_json .= $char;
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}
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break;
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case ',':
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if(!$in_string)
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{
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$new_json .= ",\n" . str_repeat($tab, $indent_level);
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}
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else
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{
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$new_json .= $char;
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}
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break;
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case ':':
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if(!$in_string)
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{
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$new_json .= ": ";
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}
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else
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{
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$new_json .= $char;
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}
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break;
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case '"':
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if($c > 0 && $json[$c-1] != '\\')
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{
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$in_string = !$in_string;
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}
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default:
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$new_json .= $char;
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break;
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}
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}
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return $new_json;
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}
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}
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/* End of file json.php */
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/* Location: ./application/datamapper/json.php */
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