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FrxReportEditor.inc in Forena Reports 7

Same filename and directory in other branches
  1. 6.2 FrxReportEditor.inc
  2. 6 FrxReportEditor.inc
  3. 7.2 FrxReportEditor.inc

File

FrxReportEditor.inc
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<?php

/**
 * Wrapper XML class for working with DOM object.
 * It provides helper
 * Enter description here ...
 * @author metzlerd
 *
 */
class FrxReportEditor {
  public $dom;
  public $document_root;
  public $simplexml;
  public $title;
  public $doc_prefix = '<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE root [
    <!ENTITY nbsp "&#160;">
    ]>';
  public $xmlns = 'urn:FrxReports';
  private $xpq;

  /**
   * Create initial FRX report
   * Enter description here ...
   * @param unknown_type $xml_string
   */
  public function __construct($xml_string = '') {
    $this->dom = new DOMDocument('1.0', 'UTF-8');
    $dom = $this->dom;

    // Load a new one or build the empty XML Document
    if ($xml_string) {

      // Eliminate the xml headers that don't have encoding info
      $xml_string = str_ireplace('<?xml version="1.0"?>', '', $xml_string);

      // If the <?xml code is missing assume UTF-8
      if (strpos($xml_string, '<?xml') === FALSE) {
        $xml_string = $this->doc_prefix . "\n" . $xml_string;
      }
    }
    else {
      $xml_string = $this->doc_prefix . '<html xmlns:frx="urn:FrxReports"><head/><body/></html>';
    }
    libxml_use_internal_errors();
    try {
      $dom
        ->loadXML($xml_string);
    } catch (Exception $e) {
      forena_error('Invalid or malformed report document', '<pre>' . $e
        ->getMessage() . $e
        ->getTraceAsString() . '</pre>');
    }
    $this
      ->verifyHeaderElements();
    $tnodes = $dom
      ->getElementsByTagName('title');
    if ($tnodes->length) {
      $this->title = $tnodes
        ->item(0)->textContent;
    }
    $this->document_root = $dom->documentElement;
    $this->simplexml = simplexml_import_dom($dom);
    $dom->formatOutput = TRUE;
    $this->xpq = new DOMXPath($dom);
    $this->xpq
      ->registerNamespace('frx', $this->xmlns);
  }

  /**
   * Report the root element
   * Enter description here ...
   */
  public function asXML() {
    $dom = $this->dom;
    $dom->formatOutput = TRUE;
    return $dom
      ->saveXML();
  }

  /**
   * Set the value of an element within the report
   * @param String $xpath Xpath to element being saved
   * @param string $value Value to be saved.
   * @return unknown_type
   */
  public function setValue($xpath, $value) {
    $xml = $this->simplexml;
    $i = strrpos($xpath, '/');
    $path = substr($xpath, 0, $i);
    $key = substr($xpath, $i + 1);
    $nodes = $xml
      ->xpath($path);
    if ($nodes) {

      // if the last part of the xpath is a key then assume the key
      if (strpos($key, '@') === 0) {
        $key = trim($key, '@');
        if (is_null($value)) {
          unset($nodes[0][$key]);
        }
        else {
          $nodes[0][$key] = $value;
        }
      }
      else {
        if (is_null($value)) {
          unset($nodes[0]->{$key});
        }
        else {
          $nodes[0]->{$key} = $value;
        }
      }
      return TRUE;
    }
    else {
      return FALSE;
    }
  }

  /**
   * Set the value of the body of the report
   * Will parse and set the value of the body of the report
   * using XML
   * @param html $body
   */
  public function setBody($body) {
    $dom = $this->dom;
    $nodes = $dom
      ->getElementsByTagName('body');
    $cur_body = $nodes
      ->item(0);

    // Make sure that we have a body tag.
    if (strpos($body, '<body') === FALSE) {
      $body = '<body>' . $body . '</body>';
    }

    // Attempt to parse the xml
    $body_doc = new DOMDocument('1.0', 'UTF-8');
    $body_xml = $this->doc_prefix . '<html xmlns:frx="' . $this->xmlns . '">' . $body . '</html>';
    try {
      $body_doc
        ->loadXML($body_xml);
      $new_body = $dom
        ->importNode($body_doc
        ->getElementsByTagName('body')
        ->item(0), TRUE);
      $parent = $cur_body->parentNode;
      $parent
        ->replaceChild($new_body, $cur_body);
    } catch (Exception $e) {
      forena_error('Malformed report body', '<pre>' . $e
        ->getMessage() . $e
        ->getTraceAsString() . '</pre>');
    }
  }

  /**
   * Makes sure that the normal header elements for a report are there.
   * Enter description here ...
   */
  public function verifyHeaderElements($required_elements = array()) {
    if (!$required_elements) {
      $required_elements = array(
        'category',
        'options',
        'fields',
        'parameters',
        'docgen',
      );
    }
    $dom = $this->dom;
    $head = $dom
      ->getElementsByTagName('head')
      ->item(0);

    // Make sure the report title exists.
    if ($dom
      ->getElementsByTagName('title')->length == 0) {
      $n = $dom
        ->createElement('title');
      $head
        ->appendChild($n);
    }

    // Make sure each of these exists in the header
    foreach ($required_elements as $tag) {
      if ($dom
        ->getElementsByTagNameNS($this->xmlns, $tag)->length == 0) {
        $n = $dom
          ->createElementNS($this->xmlns, $tag);
        $head
          ->appendChild($n);
      }
    }
  }

  /**
   * Genreal utility for setting data in the header of a reprot
   *
   * @param string $parent Name of parent element
   * @param string $element Name of child element
   * @param array $element_array Data containing the elements
   * @param array $attributes array of attribute names to set
   * @param string $element_field name of field containing node data
   * @param unknown_type $id_field name of field containint node id
   */
  public function setFrxHeader($parent, $element, $element_array, $attributes, $element_field = '', $id_field = 'id') {
    $dom = $this->dom;
    $xpq = $this->xpq;
    $this
      ->verifyHeaderElements(array(
      $parent,
    ));
    $pnode = $dom
      ->getElementsByTagNameNS($this->xmlns, $parent)
      ->item(0);

    // Iterate through all child arrays in the header
    foreach ($element_array as $element_data) {
      $id = $element_data[$id_field];
      $path = '//frx:' . $parent . '/frx:' . $element . '[@' . $id_field . '="' . $id . '"]';
      $nodes = $xpq
        ->query($path);
      $value = null;
      if ($element && isset($element_data[$element_field])) {
        $value = $element_data[$element_field];
      }
      $node = $dom
        ->createElementNS($this->xmlns, $element, $value);
      if ($nodes->length == 0) {
        $pnode
          ->appendChild($node);
      }
      else {
        $src_node = $nodes
          ->item(0);
        $pnode
          ->replaceChild($node, $src_node);
      }
      foreach ($attributes as $attribute) {
        if (isset($element_data[$attribute])) {
          $node
            ->setAttribute($attribute, $element_data[$attribute]);
        }
        else {
          if ($node
            ->hasAttribute($attribute)) {
            $node
              ->removeAttribute($attribute);
          }
        }
      }
    }
  }

  /**
   * Builds the fields from an array of elements.
   * Enter description here ...
   * @param $fieldElements
   */
  public function setFields($fieldElements) {
    $dom = $this->dom;
    $newFields = $dom
      ->createElementNS($this->xmlns, 'fields');
    $this
      ->verifyHeaderElements(array(
      'fields',
    ));
    $fnode = $dom
      ->getElementsByTagNameNS($this->xmlns, 'fields')
      ->item(0);
    $p = $fnode->parentNode;
    $p
      ->replaceChild($newFields, $fnode);
    $this
      ->setFrxHeader('fields', 'field', $fieldElements, array(
      'id',
      'link',
      'format',
      'format-string',
      'target',
    ), 'default');
  }

  /**
   * Set document generation types that apply to this report.
   * Enter description here ...
   * @param unknown_type $docgenElements
   */
  public function setDocgen($docgenElements) {
    $dom = $this->dom;
    $newDocs = $dom
      ->createElementNS($this->xmlns, 'docgen');
    $this
      ->verifyHeaderElements(array(
      'docgen',
    ));
    $dnode = $dom
      ->getElementsByTagNameNS($this->xmlns, 'docgen')
      ->item(0);
    $p = $dnode->parentNode;
    $p
      ->replaceChild($newDocs, $dnode);
    $this
      ->setFrxHeader('docgen', 'doc', $docgenElements, array(
      'type',
    ), null, 'type');
  }

  /**
   * Set report parameters
   * Enter description here ...
   * @param array $parmElements array
   */
  public function setParameters($parmElements) {
    $this
      ->setFrxHeader('parameters', 'parm', $parmElements, array(
      'id',
      'label',
      'require',
      'desc',
      'data_source',
      'data_field',
      'type',
    ), 'value');
  }

  /**
   * Set the report title
   * @param String $title
   */
  public function setTitle($title) {
    $dom = $this->dom;
    $head = $dom
      ->getElementsByTagName('head')
      ->item(0);
    $tnode = $dom
      ->getElementsByTagName('title')
      ->item(0);
    $node = $dom
      ->createElement('title', $title);
    $head
      ->replaceChild($node, $tnode);
  }

  /**
   * Set the report category
   * Enter description here ...
   * @param unknown_type $cateogry
   */
  public function setCategory($category) {
    $ret = array();
    $dom = $this->dom;
    $this
      ->verifyHeaderElements(array(
      'category',
    ));
    $head = $dom
      ->getElementsByTagName('head')
      ->item(0);
    $cnode = $dom
      ->getElementsByTagNameNS($this->xmlns, 'category')
      ->item(0);
    $node = $dom
      ->createElementNS($this->xmlns, 'category', $category);
    $head
      ->replaceChild($node, $cnode);
  }
  public function getCategory() {
    $dom = $this->dom;
    $this
      ->verifyHeaderElements(array(
      'category',
    ));
    $cnode = $dom
      ->getElementsByTagNameNS($this->xmlns, 'category')
      ->item(0);
    return $cnode->textContent;
  }

  /**
   * Retrieve options element in array form
   */
  public function getOptions() {
    $dom = $this->dom;
    $this
      ->verifyHeaderElements(array(
      'options',
    ));
    $opts = $dom
      ->getElementsByTagNameNS($this->xmlns, 'options')
      ->item(0);
    $ret = array();

    // Simplexml is easier to work with
    $options = simplexml_import_dom($opts);
    foreach ($options
      ->attributes() as $key => $value) {
      $ret[(string) $key] = (string) $value;
    }
    return $ret;
  }

  /**
   * Set the options list for the report
   * Enter description here ...
   * @param unknown_type $option_data
   */
  public function setOptions($option_data) {
    $dom = $this->dom;
    $this
      ->verifyHeaderElements(array(
      'options',
    ));
    $options = $dom
      ->getElementsByTagNameNS($this->xmlns, 'options')
      ->item(0);
    foreach ($option_data as $key => $value) {
      if ($value) {
        $options
          ->setAttribute($key, $value);
      }
      else {
        if ($options
          ->hasAttribute($key)) {
          $options
            ->removeAttribute($key);
        }
      }
    }
  }
  public function removeParm($id) {
    $dom = $this->dom;
    $xpq = $this->xpq;
    $pnode = $dom
      ->getElementsByTagNameNS($this->xmlns, 'parameters')
      ->item(0);
    $path = '//frx:parameters/frx:parm[@id="' . $id . '"]';
    $nodes = $xpq
      ->query($path);
    if ($nodes->length) {
      foreach ($nodes as $node) {
        $pnode
          ->removeChild($node);
      }
    }
  }

  /**
   * Make sure all xml elements have ids
   */
  private function parse_ids() {
    $i = 0;
    if ($this->simplexml) {
      $this->simplexml
        ->registerXPathNamespace('frx', FRX_NS);
      $frx_attributes = array();
      $frx_nodes = $this->simplexml
        ->xpath('body//*[@frx:*]');
      if ($frx_nodes) {
        foreach ($frx_nodes as $node) {
          $attr_nodes = $node
            ->attributes(FRX_NS);
          if ($attr_nodes) {

            // Make sure every element has an id
            $i++;
            $id = 'forena-' . $i;
            if (!(string) $node['id']) {
              $node
                ->addAttribute('id', $id);
            }
            else {
              if (strpos((string) $node['id'], 'forena-') === 0) {

                // Reset the id to the numerically generated one
                $node['id'] = $id;
              }
              else {

                // Use the id of the element
                $id = (string) $node['id'];
              }
            }

            // Save away the frx attributes in case we need them later.
            $attr_nodes = $node
              ->attributes(FRX_NS);
            $attrs = array();
            if ($attr_nodes) {
              foreach ($attr_nodes as $key => $value) {
                $attrs[$key] = (string) $value;
              }
            }

            // Save away the attributes
            $frx_attributes[$id] = $attrs;
          }
        }
      }
      $this->frx_attributes = $frx_attributes;
    }
  }

  /**
   * Get the attributes by
   *
   * @return array Attributes
   *
   * This function will return an array for all of the frx attributes defined in the report body
   * These attributes can be saved away and added back in later using.
   */
  public function get_attributes_by_id() {
    $this
      ->parse_ids();
    return $this->frx_attributes;
  }

  /**
   * Save attributes based on id match
   *
   * @param array $attributes
   *
   * The attributes array should be of the form
   * array( element_id => array( key1 => value1, key2 => value2)
   * The function restores the attributes based on the element id.
   */
  public function save_attributes_by_id($attributes) {
    $rpt_xml = $this->simplexml;
    if ($attributes) {
      foreach ($attributes as $id => $att_list) {
        $id_search_path = '//*[@id="' . $id . '"]';
        $fnd = $rpt_xml
          ->xpath($id_search_path);
        if ($fnd) {
          $node = $fnd[0];

          // Start attribute replacement
          $frx_attributes = $node
            ->Attributes(FRX_NS);
          foreach ($att_list as $key => $value) {
            if (!$frx_attributes[$key]) {
              $node['frx:' . $key] = $value;
            }
            else {
              unset($frx_attributes[$key]);
              $node['frx:' . $key] = $value;
            }
          }
        }
      }
    }
  }

}

Classes

Namesort descending Description
FrxReportEditor Wrapper XML class for working with DOM object. It provides helper Enter description here ... @author metzlerd