<?php
/*******************************************************************************
 *
 * LEIDEN OPEN VARIATION DATABASE (LOVD)
 *
 * Created     : 2010-03-04
 * Modified    : 2016-02-11
 * For LOVD    : 3.0-15
 *
 * Copyright   : 2004-2016 Leiden University Medical Center; http://www.LUMC.nl/
 * Programmers : Ing. Ivo F.A.C. Fokkema <I.F.A.C.Fokkema@LUMC.nl>
 *               Ing. Ivar C. Lugtenburg <I.C.Lugtenburg@LUMC.nl>
 *               Msc. Daan Asscheman <D.Asscheman@LUMC.nl>
 *               Mark Kroon MSc. <M.Kroon@LUMC.nl>
 *
 *
 * This file is part of LOVD.
 *
 * LOVD is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * LOVD is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with LOVD.  If not, see <http://www.gnu.org/licenses/>.
 *
 *************/

// Don't allow direct access.
if (!defined('ROOT_PATH')) {
    exit;
}
// Require parent class definition.
require_once ROOT_PATH . 'class/objects.php';





class LOVD_Column extends LOVD_Object {
    // This class extends the basic Object class and it handles the Column object.
    var $sObject = 'Column';
    var $sTable  = 'TABLE_COLS';





    function __construct ()
    {
        // Default constructor.

        // SQL code for loading an entry for an edit form.
        $this->sSQLLoadEntry = 'SELECT c.*, ' .
                                 'SUBSTRING_INDEX(c.id, "/", 1) AS category, ' .
                                 'SUBSTRING(c.id, LOCATE("/", c.id)+1) AS colid, ' .
                                 '(a.created_by > 0) AS active, ' .
                                 'GROUP_CONCAT(c2l.linkid SEPARATOR ";") AS _active_links ' .
                               'FROM ' . TABLE_COLS . ' AS c ' .
                                 'LEFT JOIN ' . TABLE_ACTIVE_COLS . ' AS a ON (c.id = a.colid) ' .
                                 'LEFT OUTER JOIN ' . TABLE_COLS2LINKS . ' AS c2l ON (c.id = c2l.colid) ' .
                               'WHERE c.id = ? ' .
                               'GROUP BY c.id';

        // SQL code for preparing view entry query.
        // Increase DB limits to allow concatenation of large number of gene/disease IDs.
        $this->sSQLPreViewEntry = 'SET group_concat_max_len = 200000';

        // SQL code for viewing an entry.
        $this->aSQLViewEntry['SELECT']   = 'c.*, ' .
                                           'SUBSTRING_INDEX(c.id, "/", 1) AS category, ' .
                                           'SUBSTRING(c.id, LOCATE("/", c.id)+1) AS colid, ' .
                                           '(a.colid IS NOT NULL) AS active, ' .
                                           'uc.name AS created_by_, ' .
                                           'ue.name AS edited_by_, ' .
                                           'GROUP_CONCAT(sc.geneid ORDER BY sc.geneid SEPARATOR ";") AS _genes, ' .
                                           'GROUP_CONCAT(DISTINCT d.id, ";", IF(CASE d.symbol WHEN "-" THEN "" ELSE d.symbol END = "", d.name, d.symbol) ORDER BY (d.symbol != "" AND d.symbol != "-") DESC, d.symbol, d.name SEPARATOR ";;") AS __diseases';
        $this->aSQLViewEntry['FROM']     = TABLE_COLS . ' AS c ' .
                                           'LEFT OUTER JOIN ' . TABLE_ACTIVE_COLS . ' AS a ON (c.id = a.colid) ' .
                                           'LEFT OUTER JOIN ' . TABLE_USERS . ' AS uc ON (c.created_by = uc.id) ' .
                                           'LEFT OUTER JOIN ' . TABLE_USERS . ' AS ue ON (c.edited_by = ue.id) ' .
                                           'LEFT OUTER JOIN ' . TABLE_SHARED_COLS . ' AS sc ON (c.id = sc.colid) ' .
                                           'LEFT OUTER JOIN ' . TABLE_DISEASES . ' AS d ON (sc.diseaseid = d.id)';
        $this->aSQLViewEntry['GROUP_BY'] = 'c.id';

        // SQL code for viewing a list of entries.
        $this->aSQLViewList['SELECT']   = 'c.*, ' .
                                          'SUBSTRING_INDEX(c.id, "/", 1) AS category, ' .
                                          'SUBSTRING(c.id, LOCATE("/", c.id)+1) AS colid, ' .
                                          'IF(a.colid IS NULL, 0, 1) AS active, ' .
                                          'u.name AS created_by_';
        $this->aSQLViewList['FROM']     = TABLE_COLS . ' AS c ' .
                                          'LEFT JOIN ' . TABLE_ACTIVE_COLS . ' AS a ON (c.id = a.colid) ' .
                                          'LEFT JOIN ' . TABLE_USERS . ' AS u ON (c.created_by = u.id)';
        $this->aSQLViewList['ORDER_BY'] = 'category, col_order, colid';

        // List of columns and (default?) order for viewing an entry.
        $this->aColumnsViewEntry =
                 array(
                        'category' => 'Data category',
                        'colid' => 'Column ID',
                        'head_column' => 'Column heading',
                        'active_' => 'Active in LOVD?',
                        'hgvs_' => 'HGVS required column',
                        'standard_' => 'Standard/Enabled by default',
                        'mandatory_' => 'Mandatory',
                        'description_form' => 'Description on form',
                        'description_legend_short' => 'Description on short legend',
                        'description_legend_full' => 'Description on full legend',
                        'mysql_type' => 'Database type',
                        'form_type_' => 'Form type',
                        'select_options' => 'Select options',
                        'preg_pattern' => 'Regular expression pattern',
                        'public_view_' => 'Show to public',
                        'public_add_' => 'Show on submission form',
                        'allow_count_all_' => 'Include in search form',
                        'parent_objects' => 'Column activated for',
                        'created_by_' => 'Created by',
                        'created_date' => 'Date created',
                        'edited_by_' => 'Last edited by',
                        'edited_date' => 'Date last edited',
                      );

        // List of columns and (default?) order for viewing a list of entries.
        $this->aColumnsViewList =
                 array(
                        'category' => array(
                                    'view' => array('Category', 120),
                                    'db'   => array('SUBSTRING_INDEX(c.id, "/", 1)', 'ASC', true)),
                        'colid_' => array(
                                    'view' => array('ID', 175),
                                    'db'   => array('SUBSTRING(c.id, LOCATE("/", c.id)+1)', 'ASC', true)),
                        'head_column' => array(
                                    'view' => array('Heading', 150),
                                    'db'   => array('c.head_column', 'ASC', true),
                                    'legend' => array('The header of this column in data listings.')),
                        'active_' => array(
                                    'view' => array('Active', 60, 'style="text-align : center;"'),
                                    'db'   => array('IFNULL((a.colid IS NOT NULL), 0)', 'DESC', 'INT'),
                                    'legend' => array('Whether this column has been activated in LOVD. For shared columns (Phenotype or VariantOnTranscript columns) this does not mean this column is activated in all diseases or genes, respectively.')),
                        'hgvs_' => array(
                                    'view' => array('HGVS', 50, 'style="text-align : center;"'),
                                    'db'   => array('c.hgvs', 'DESC', true),
                                    'legend' => array('Whether this column is HGVS standard or not. HGVS standard columns can not be removed or disabled.')),
                        'standard_' => array(
                                    'view' => array('Standard', 80, 'style="text-align : center;"'),
                                    'db'   => array('c.standard', 'DESC', true),
                                    'legend' => array('Whether this column is activated by default. For shared columns (Phenotype or VariantOnTranscript columns) this means newly created diseases or genes, include this column by default.')),
                        'public_view_' => array(
                                    'view' => array('Public', 60, 'style="text-align : center;"'),
                                    'db'   => array('c.public_view', 'DESC', true),
                                    'legend' => array('Whether the public can see this column\'s contents or not.')),
                        'col_order' => array(
                                    'view' => array('Order&nbsp;', 60, 'style="text-align : right;"'),
                                    'db'   => array('SUBSTRING_INDEX(c.id, "/", 1), col_order', 'ASC')),
                        'form_type_' => array(
                                    'view' => array('Form type', 200)),
                        'created_by_' => array(
                                    'view' => array('Created by', 160),
                                    'db'   => array('u.name', 'DESC', true)),
                      );
        $this->sSortDefault = 'category';

        parent::__construct();
    }





    function checkFields ($aData, $zData = false)
    {
        // Checks fields before submission of data.
        global $_DB;

        // Mandatory fields.
        $this->aCheckMandatory =
                 array(
                        'category',
                        'colid',
                        'head_column',
                        'description_legend_short',
                        'description_legend_full',
                        'mysql_type',
                        'form_type',
                        'width',
                      );

        if (ACTION == 'edit') {
            unset($this->aCheckMandatory['colid']);
        } elseif (!empty($aData['active_links']) && !preg_match('/^TEXT|VARCHAR/', $aData['mysql_type'])) {
            lovd_errorAdd('active_links', 'Only VARCHAR or TEXT columns can have custom links activated for it!');
        }

        parent::checkFields($aData);

        // Category; not chosen on this form, but we want to make sure it's correct anyways.
        if (!empty($aData['category']) && !in_array($aData['category'], array('Individual', 'Phenotype', 'Screening', 'VariantOnGenome', 'VariantOnTranscript'))) {
            lovd_errorAdd('category', 'The category is not correct. Please choose one of the following: Individual, Phenotype, Screening, VariantOnGenome or VariantOnTranscript.');
        }

        // ColID format.
        if (!empty($aData['colid']) && !preg_match('/^[A-Za-z0-9_]+(\/[A-Za-z0-9_]+)*$/', $aData['colid'])) {
            lovd_errorAdd('colid', 'The column ID is not of the correct format. It can contain only letters, numbers and underscores. Subcategories must be divided by a slash (/).');
        }

        // During an import ColID that exist in the database do not give a hard error. Error is handled in import.php
        if (lovd_getProjectFile() != '/import.php') {
            // ColID must not exist in the database.
            if (!empty($aData['category']) && !empty($aData['colid'])) {
                if ($_DB->query('SELECT COUNT(*) FROM ' . TABLE_COLS . ' WHERE id = ?', array($aData['category'] . '/' . $aData['colid']))->fetchColumn()) {
                    lovd_errorAdd('colid', 'There is already a ' . $aData['category'] . ' column with this column ID. Please verify that you\'re not trying to create a column that already exists!');
                }
            }
        }

        // Width can not be less than 20 or more than 500.
        // These numbers are also defined in object_shared_columns.php and inc-js-columns.php.
        if (isset($aData['width']) && strlen($aData['width']) > 0) {
            if ($aData['width'] > 500) {
                lovd_errorAdd('width', 'The width can not be more than 500 pixels!');
            } elseif ($aData['width'] < 20) {
                lovd_errorAdd('width', 'The width can not be less than 20 pixels!');
            }
        }

        // MySQL type format.
        if ($aData['mysql_type'] && !preg_match('/^(TEXT|VARCHAR\([0-9]{1,3}\)|DATE(TIME)?|((TINY|SMALL|MEDIUM|BIG)?INT\([0-9]{1,2}\)|DECIMAL\([0-9]{1,2}\,[0-9]{1,2}\)|FLOAT)( UNSIGNED)?)( DEFAULT ([0-9]+|"[^"]+"))?$/i', $aData['mysql_type'])) {
            lovd_errorAdd('mysql_type', 'The MySQL data type is not recognized. Please use the data type wizard to generate a proper MySQL data type.');
        }

        // Form type.
        if ($aData['form_type'] && !preg_match('/^[^|]+\|[^|]*\|(checkbox|text\|[0-9]+|textarea\|[0-9]+\|[0-9]+|select\|[0-9]+\|[^|]*\|(false|true)\|(false|true))$/i', $aData['form_type'])) {
            lovd_errorAdd('form_type', 'The form type is not recognized. Please use the data type wizard to generate a proper form type.');
        }

        // XSS attack prevention. Deny input of HTML.
        // Ignore some fields that are allowed to contain HTML, or that might cause false positives.
        unset($aData['description_form'], $aData['preg_pattern'], $aData['description_legend_short'], $aData['description_legend_full']);
        lovd_checkXSS($aData);
    }





    function getForm ()
    {
        // Build the form.

        // If we've built the form before, simply return it. Especially imports will repeatedly call checkFields(), which calls getForm().
        if (!empty($this->aFormData)) {
            return parent::getForm();
        }

        global $_PE, $_DB;

        // Get links list, to connect column to link.
        $aLinks = $_DB->query('SELECT id, name FROM ' . TABLE_LINKS . ' ORDER BY name')->fetchAllCombine();
        $nLinkSize = count($aLinks);
        $nLinkSize = ($nLinkSize < 10? $nLinkSize : 10);

        // Array which will make up the form table.
        $this->aFormData =
                 array(
                        array('POST', '', '', '', '60%', '14', '40%'),
                        array('', '', 'print', '<B>Column name and descriptions</B>'),
                        'hr',
          'category' => array('', '', 'print', '<I>Selected category: ' . $_POST['category'] . '</I>'),
             'colid' => array('Column ID', '', 'text', 'colid', 30),
        'colid_note' => array('', '', 'note', 'This ID must be unique and may contain only letters, numbers and underscores. Subcategories must be divided by a slash (/), such as \'{{ EXAMPLE }}\'.'),
                        array('Column heading', 'This will appear above the column in data tables.', 'text', 'head_column', 30),
                        array('Description on short legend<BR>(HTML enabled)', '', 'textarea', 'description_legend_short', 40, 2),
                        array('Description on full legend<BR>(HTML enabled)', '', 'textarea', 'description_legend_full', 40, 4),
                        array('', '', 'note', 'The full legend description will also serve as help text. In create and edit forms where this custom column is present, the text will be shown when someone hovers their mouse over the blue question mark next to the input field.'),
                        'hr',
                        'skip',
                        array('', '', 'print', '<B>Data and form settings</B> (Use data type wizard to change values)'),
                        'hr',
                        array('', '', 'print', '<BUTTON type="button" onclick="javascript:lovd_openWindow(\'' . lovd_getInstallURL() . $_PE[0] . '?data_type_wizard&amp;workID=' . $_POST['workID'] . '\', \'DataTypeWizard\', 800, 400); return false;">Start data type wizard</BUTTON>'),
                        array('MySQL data type', '<B>Experts only!</B> Only change this field manually when you know what you\'re doing! Otherwise, use the data type wizard by clicking the button above this field.', 'text', 'mysql_type', 30),
                        array('Form type', '<B>Experts only!</B> Only change this field manually when you know what you\'re doing! Otherwise, use the data type wizard by clicking the button above the MySQL data type field.', 'text', 'form_type', 30),
                        'hr',
                        'skip',
                        array('', '', 'print', '<B>Column settings</B>'),
                        'hr',
     'settings_note' => array('', '', 'print', '<I>Please note that fields marked with * are merely default values. For each configured {{ DATATYPE }}, these values may be changed at any later time.</I>'),
          'standard' => array('Include this column for newly configured ', '', 'checkbox', 'standard'),
             'width' => array('Column display width in pixels', '', 'text', 'width', 5),
                        array('', '', 'print', '<IMG src="gfx/trans.png" alt="" width="' . (int) $_POST['width'] . '" height="3" style="background : #000000;"><BR><SPAN class="form_note">(This is ' . (int) $_POST['width'] . ' pixels)</SPAN>'),
         'mandatory' => array('Mandatory field', '', 'checkbox', 'mandatory'),
       'public_view' => array('Show contents to public', '', 'checkbox', 'public_view'),
        'public_add' => array('Show field on submission form', '', 'checkbox', 'public_add'),
                        'hr',
// FIXME; implement this later.
//                        array('Include in "hidden entries" search form', '', 'checkbox', 'allow_count_all'),
//                        array('', '', 'print', '<SPAN class="form_note">Selecting this checkbox allows the public to find the number of entries in the database (including hidden entries) matching one or more search terms on this column.</SPAN>'),
                        'skip',
'active_links_title' => array('', '', 'print', '<B>Link settings</B>'),
  'active_links_hr1' => 'hr',
      'active_links' => array('Active custom links', '', 'select', 'active_links', $nLinkSize, $aLinks, false, true, true),
  'active_links_hr2' => 'hr',
 'active_links_skip' => 'skip',
      'apply_to_all' => array('Apply changes to all {{ UNIT }} where this column is active', '', 'checkbox', 'apply_to_all'),
                        array('Enter your password for authorization', '', 'password', 'password', 20));

        // Change some text on the form.
        switch ($_POST['category']) {
            case 'Individual':
                unset($this->aFormData['settings_note']);
                unset($this->aFormData['standard']);
                unset($this->aFormData['apply_to_all']);
                $this->aFormData['colid_note'][3] = str_replace('{{ EXAMPLE }}', 'Geograpic_origin/Country', $this->aFormData['colid_note'][3]);
                break;
            case 'Phenotype':
                $this->aFormData['settings_note'][3] = str_replace('{{ DATATYPE }}', 'disease', $this->aFormData['settings_note'][3]);
                $this->aFormData['standard'][0] .= 'diseases';
                $this->aFormData['colid_note'][3] = str_replace('{{ EXAMPLE }}', 'Blood_pressure/Systolic', $this->aFormData['colid_note'][3]);
                $this->aFormData['width'][0] .= ' *';
                $this->aFormData['mandatory'][0] .= ' *';
                $this->aFormData['public_view'][0] .= ' *';
                $this->aFormData['public_add'][0] .= ' *';
                $this->aFormData['apply_to_all'][0] = str_replace('{{ UNIT }}', 'diseases', $this->aFormData['apply_to_all'][0]);
                break;
            case 'Screening':
                unset($this->aFormData['settings_note']);
                unset($this->aFormData['standard']);
                unset($this->aFormData['apply_to_all']);
                $this->aFormData['colid_note'][3] = str_replace('{{ EXAMPLE }}', 'Protocol/Date_updated', $this->aFormData['colid_note'][3]);
                break;
            case 'VariantOnGenome':
                unset($this->aFormData['settings_note']);
                unset($this->aFormData['standard']);
                unset($this->aFormData['apply_to_all']);
                $this->aFormData['colid_note'][3] = str_replace('{{ EXAMPLE }}', 'Frequency/dbSNP', $this->aFormData['colid_note'][3]); // FIXME; I think this example sucks.
                break;
            case 'VariantOnTranscript':
                $this->aFormData['settings_note'][3] = str_replace('{{ DATATYPE }}', 'gene', $this->aFormData['settings_note'][3]);
                $this->aFormData['standard'][0] .= 'genes';
                $this->aFormData['colid_note'][3] = str_replace('{{ EXAMPLE }}', 'Protein/Codon', $this->aFormData['colid_note'][3]);
                $this->aFormData['width'][0] .= ' *';
                $this->aFormData['mandatory'][0] .= ' *';
                $this->aFormData['public_view'][0] .= ' *';
                $this->aFormData['public_add'][0] .= ' *';
                $this->aFormData['apply_to_all'][0] = str_replace('{{ UNIT }}', 'genes', $this->aFormData['apply_to_all'][0]);
                break;
        }

        // Het hele formulier moet anders met het editen... het display gedeelte moet apart denk ik - "edit display settings"; variant en phenotype cols hebben "set defaults for new genes/diseases", alle hebben "edit data types" ofzo.
        if (ACTION == 'edit') {
            if (!preg_match('/^TEXT|VARCHAR/', $_POST['mysql_type']) || $_PE[2] == 'DBID') {
                unset($this->aFormData['active_links_title'], $this->aFormData['active_links_hr1'], $this->aFormData['active_links'], $this->aFormData['active_links_hr2'], $this->aFormData['active_links_skip']);
            }
            unset($this->aFormData['colid'], $this->aFormData['colid_note']);
        } elseif (ACTION == 'create') {
            unset($this->aFormData['apply_to_all']);
        }

        return parent::getForm();
    }





    function prepareData ($zData = '', $sView = 'list')
    {
        // Prepares the data by "enriching" the variable received with links, pictures, etc.

        if (!in_array($sView, array('list', 'entry'))) {
            $sView = 'list';
        }

        // Makes sure it's an array and htmlspecialchars() all the values.
        $zData = parent::prepareData($zData, $sView);

        if (!function_exists('lovd_describeFormType')) {
            require ROOT_PATH . 'inc-lib-columns.php';
        }

        if ($sView == 'list') {
            $zData['row_id']      = $zData['id'];
            $zData['row_link']    = 'columns/' . $zData['id']; // Note: I chose not to use rawurlencode() here!
            $zData['colid_'] = '<A href="' . $zData['row_link'] . '" class="hide">' . $zData['colid'] . '</A>';
            $zData['form_type_']  = lovd_describeFormType($zData);
        } else {
            // Remove unnecessary columns.
            if ($zData['edited_by'] == NULL) {
                // Never been edited.
                unset($this->aColumnsViewEntry['edited_by_'], $this->aColumnsViewEntry['edited_date']);
            }

            // Remove columns based on form type?
            $aFormType = explode('|', $zData['form_type']);
            if ($aFormType[2] != 'select') {
                unset($this->aColumnsViewEntry['select_options']);
            } else {
                unset($this->aColumnsViewEntry['preg_pattern']);
            }

            $zData['mandatory_']       = '<IMG src="gfx/mark_' . $zData['mandatory'] . '.png" alt="" width="11" height="11">';
            $zData['description_legend_short'] = html_entity_decode(str_replace(array("\r", "\n"), ' ', $zData['description_legend_short']));
            $zData['description_legend_full'] = html_entity_decode(str_replace(array("\r", "\n"), ' ', $zData['description_legend_full']));
            $zData['form_type_']       = lovd_describeFormType($zData) . '<BR>' . $zData['form_type'];
            $zData['public_add_']      = '<IMG src="gfx/mark_' . $zData['public_add'] . '.png" alt="" width="11" height="11">';
            $zData['allow_count_all_'] = '<IMG src="gfx/mark_' . $zData['allow_count_all'] . '.png" alt="" width="11" height="11">';


            if ($zData['category'] == 'VariantOnTranscript') {
                // Show genes for which this column is activated.
                $this->aColumnsViewEntry['parent_objects'] = 'Column activated for genes';
                $zData['parent_objects'] = $this->lovd_getObjectLinksHTML($zData['genes'], 'genes/%s');

            } elseif ($zData['category'] == 'Phenotype') {
                // Show diseases for which this column is activated.
                $this->aColumnsViewEntry['parent_objects'] = "Column activated for diseases";
                $zData['parent_objects'] = $this->lovd_getObjectLinksHTML($zData['diseases'], 'diseases/%s');
            } else {
                unset($this->aColumnsViewEntry['parent_objects']);
            }

        }
        // FIXME; for titles use tooltips?
        $zData['active_']      = '<IMG src="gfx/mark_' . (int) $zData['active'] . '.png" alt="" width="11" height="11">';
        $zData['hgvs_']        = '<IMG src="gfx/mark_' . $zData['hgvs'] . '.png" alt="" title="This column is ' . ($zData['hgvs']? '' : 'not ') . 'required by the HGVS standards for sequence variant databases" width="11" height="11">';
        $zData['standard_']    = '<IMG src="gfx/mark_' . $zData['standard'] . '.png" alt="" title="This column is ' . ($zData['standard']? '' : 'not ') . 'enabled by default" width="11" height="11">';
        $zData['public_view_'] = '<IMG src="gfx/mark_' . $zData['public_view'] . '.png" alt="" width="11" height="11">';

        return $zData;
    }





    function setDefaultValues ()
    {
        // Sets default values of fields in $_POST.
        $_POST['width'] = '200';
        $_POST['public_view'] = 1;
        $_POST['public_add'] = 1;
        $_POST['allow_count_all'] = 1;
        $_POST['description_form'] = '';
        $_POST['select_options'] = '';
        $_POST['preg_pattern'] = '';

        // Default data type information, loaded in SESSION.
        $_SESSION['form_type'] =
                 array(
                        'form_type' => '',
                        'name' => '',
                        'size' => '',
                        'maxlength' => '',
                        'scale' => '',
                        'preg_pattern' => '',
                        'unsigned' => '',
                        'default_val' => '',
                        'cols' => '',
                        'rows' => '',
                        'select' => '',
                        'select_options' => '',
                        'select_all' => '',
                      );
        return true;
    }
}
?>
