AbstractBuildForm.php

<?php
/**
 * Created by PhpStorm.
 * User: crose
 * Date: 1/6/16
 * Time: 8:02 PM
 */

namespace qfq;

use qfq;

//use qfq\Store;
//use qfq\OnArray;
//use qfq\UserFormException;

require_once(__DIR__ . '/store/Store.php');
require_once(__DIR__ . '/Constants.php');
require_once(__DIR__ . '/Evaluate.php');
require_once(__DIR__ . '/BodytextParser.php');
require_once(__DIR__ . '/exceptions/DbException.php');
require_once(__DIR__ . '/exceptions/UserFormException.php');
require_once(__DIR__ . '/database/Database.php');
require_once(__DIR__ . '/helper/HelperFormElement.php');
require_once(__DIR__ . '/helper/Support.php');
require_once(__DIR__ . '/helper/OnArray.php');
require_once(__DIR__ . '/helper/Ldap.php');
require_once(__DIR__ . '/report/Link.php');
require_once(__DIR__ . '/helper/Sanitize.php');
require_once(__DIR__ . '/helper/HelperFile.php');
require_once(__DIR__ . '/report/Report.php');

/**
 * Class AbstractBuildForm
 * @package qfq
 */
abstract class AbstractBuildForm {
    protected $formSpec = array();  // copy of the loaded form
    protected $feSpecAction = array(); // copy of all formElement.class='action' of the loaded form
    protected $feSpecNative = array(); // copy of all formElement.class='native' of the loaded form
    protected $buildElementFunctionName = array();
    protected $pattern = array();
    protected $wrap = array();
    protected $symbol = array();
    protected $showDebugInfoFlag = false;

//    protected $feDivClass = array(); // Wrap FormElements in <div class="$feDivClass[type]">

    /**
     * @var Store
     */
    protected $store = null;
    /**
     * @var Evaluate
     */
    protected $evaluate = null;
    /**
     * @var string
     */
    private $formId = null;
    /**
     * @var Sip
     */
    private $sip = null;
    /**
     * @var Report
     */
    private $report = null;
    /**
     * @var BodytextParser
     */
    private $bodytextParser = null;

    /**
     * @var Database[] Array of Database instantiated class
     */
    protected $dbArray = array();

    protected $dbIndexData = false;
    protected $dbIndexQfq = false;

    /**
     * AbstractBuildForm constructor.
     *
     * @param array $formSpec
     * @param array $feSpecAction
     * @param array $feSpecNative
     * @param array $db
     * @throws CodeException
     * @throws UserFormException
     */
    public function __construct(array $formSpec, array $feSpecAction, array $feSpecNative, array $db = null) {
        $this->formSpec = $formSpec;
        $this->feSpecAction = $feSpecAction;
        $this->feSpecNative = $feSpecNative;
        $this->store = Store::getInstance();
//        $this->dbIndexData = $this->store->getVar(SYSTEM_DB_INDEX_DATA, STORE_SYSTEM);
        $this->dbIndexData = $formSpec[F_DB_INDEX];
        $this->dbIndexQfq = $this->store->getVar(SYSTEM_DB_INDEX_QFQ, STORE_SYSTEM);

        $this->dbArray = $db;
        $this->evaluate = new Evaluate($this->store, $this->dbArray[$this->dbIndexData]);
        $this->showDebugInfoFlag = Support::findInSet(SYSTEM_SHOW_DEBUG_INFO_YES, $this->store->getVar(SYSTEM_SHOW_DEBUG_INFO, STORE_SYSTEM));

        $this->sip = $this->store->getSipInstance();

        // render mode specific
        $this->fillWrap();

        $this->buildElementFunctionName = [
            FE_TYPE_CHECKBOX => 'Checkbox',
            FE_TYPE_DATE => 'DateTime',
            FE_TYPE_DATETIME => 'DateTime',
            'dateJQW' => 'DateJQW',
            'datetimeJQW' => 'DateJQW',
            'email' => 'Input',
            'gridJQW' => 'GridJQW',
            FE_TYPE_EXTRA => 'Extra',
            FE_TYPE_TEXT => 'Input',
            FE_TYPE_EDITOR => 'Editor',
            FE_TYPE_TIME => 'DateTime',
            FE_TYPE_NOTE => 'Note',
            FE_TYPE_PASSWORD => 'Input',
            FE_TYPE_RADIO => 'Radio',
            FE_TYPE_SELECT => 'Select',
            FE_TYPE_SUBRECORD => 'Subrecord',
            FE_TYPE_UPLOAD => 'File',
            FE_TYPE_ANNOTATE => 'Annotate',
            FE_TYPE_IMAGE_CUT => 'ImageCut',
            'fieldset' => 'Fieldset',
            'pill' => 'Pill',
            'templateGroup' => 'TemplateGroup',
        ];

        $this->buildRowName = [
            FE_TYPE_CHECKBOX => 'Native',
            FE_TYPE_DATE => 'Native',
            FE_TYPE_DATETIME => 'Native',
            'dateJQW' => 'Native',
            'datetimeJQW' => 'Native',
            'email' => 'Native',
            'gridJQW' => 'Native',
            FE_TYPE_EXTRA => 'Native',
            FE_TYPE_TEXT => 'Native',
            FE_TYPE_EDITOR => 'Native',
            FE_TYPE_TIME => 'Native',
            FE_TYPE_NOTE => 'Native',
            FE_TYPE_PASSWORD => 'Native',
            FE_TYPE_RADIO => 'Native',
            FE_TYPE_SELECT => 'Native',
            FE_TYPE_SUBRECORD => 'Subrecord',
            FE_TYPE_UPLOAD => 'Native',
            FE_TYPE_ANNOTATE => 'Native',
            FE_TYPE_IMAGE_CUT => 'Native',
            'fieldset' => 'Fieldset',
            'pill' => 'Pill',
            'templateGroup' => 'TemplateGroup',
        ];

        $this->symbol[SYMBOL_EDIT] = "<span class='glyphicon " . GLYPH_ICON_EDIT . "'></span>";
        $this->symbol[SYMBOL_SHOW] = "<span class='glyphicon " . GLYPH_ICON_SHOW . "'></span>";
        $this->symbol[SYMBOL_NEW] = "<span class='glyphicon " . GLYPH_ICON_NEW . "'></span>";
        $this->symbol[SYMBOL_DELETE] = "<span class='glyphicon " . GLYPH_ICON_DELETE . "'></span>";
    }

    abstract public function fillWrap();

    /**
     * Builds complete 'form'. Depending of form specification, the layout will be 'plain' / 'table' / 'bootstrap'.
     *
     * @param string $mode FORM_LOAD | FORM_UPDATE | FORM_SAVE
     *
     * @param bool $htmlElementNameIdZero
     * @param array $latestFeSpecNative
     * @return array|string $mode=LOAD_FORM: The whole form as HTML, $mode=FORM_UPDATE: array of all
     *                        formElement.dynamicUpdate-yes  values/states
     * @throws CodeException
     * @throws DbException
     * @throws UserFormException
     */
    public function process($mode, $htmlElementNameIdZero = false, $latestFeSpecNative = array()) {
        $htmlHead = '';
        $htmlTail = '';
        $htmlT3vars = '';
        $htmlSubrecords = '';
        $htmlElements = '';
        $json = array();

        // After action 'afterSave', it's necessary to reinitialize the FeSpecNative
        if (!empty($latestFeSpecNative)) {
            $this->feSpecNative = $latestFeSpecNative;
        }

        $modeCollectFe = FLAG_DYNAMIC_UPDATE;
        $storeUse = STORE_USE_DEFAULT;

        if ($mode === FORM_SAVE) {
            $modeCollectFe = FLAG_ALL;
            $storeUse = STORE_RECORD . STORE_TABLE_DEFAULT;
        }

        // <form>
        if ($mode === FORM_LOAD) {
            $htmlHead = $this->head();
        }

        $filter = $this->getProcessFilter();

        if ($this->formSpec['multiMode'] !== 'none') {

            $parentRecords = $this->dbArray[$this->dbIndexQfq]->sql($this->formSpec['multiSql']);
            foreach ($parentRecords as $row) {
                $this->store->setStore($row, STORE_PARENT_RECORD, true);
                $jsonTmp = array();
                $htmlElements = $this->elements($row['_id'], $filter, 0, $jsonTmp, $modeCollectFe);
                $json[] = $jsonTmp;
            }
        } else {
            $recordId = $this->store->getVar(SIP_RECORD_ID, STORE_SIP);
            if (!($recordId == '' || is_numeric($recordId))) {
                throw new UserFormException('Invalid record ID: r="' . $recordId, '"', ERROR_INVALID_VALUE);
            }
            $htmlElements = $this->elements($recordId, $filter, 0, $json, $modeCollectFe, $htmlElementNameIdZero, $storeUse, $mode);

            if ($mode === FORM_SAVE && $recordId != 0) {

                // element-update: with 'value'
                $recordId = $this->store->getVar(SIP_RECORD_ID, STORE_SIP . STORE_ZERO);
                $md5 = $this->buildRecordHashMd5($this->formSpec[F_TABLE_NAME], $recordId);

                // Via 'element-update'
                $json[][API_ELEMENT_UPDATE][DIRTY_RECORD_HASH_MD5][API_ELEMENT_ATTRIBUTE]['value'] = $md5;
            }
        }

        // <form>
        if ($mode === FORM_LOAD) {
            $htmlT3vars = $this->prepareT3VarsForSave();
            $htmlTail = $this->tail();
            $htmlSubrecords = $this->doSubrecords();
        }
        $htmlHidden = $this->buildAdditionalFormElements();

        $htmlSip = $this->buildHiddenSip($json);

        return ($mode === FORM_LOAD) ? $htmlHead . $htmlHidden . $htmlElements . $htmlSip . $htmlT3vars . $htmlTail . $htmlSubrecords : $json;
    }

    /**
     * Builds the head area of the form.
     *
     * @param string $mode
     * @return string
     * @throws CodeException
     * @throws DbException
     * @throws UserFormException
     */
    public function head($mode = FORM_LOAD) {
        $html = '';

        $html .= '<div ' . Support::doAttribute('class', $this->formSpec[F_CLASS], true) . '>'; // main <div class=...> around everything

        // Logged in BE User will see a FormEdit Link
        $sipParamString = OnArray::toString($this->store->getStore(STORE_SIP), ':', ', ', "'");
        $formEditUrl = $this->createFormEditorUrl(FORM_NAME_FORM, $this->formSpec[F_ID]);

        $html .= "<p><a " . Support::doAttribute('href', $formEditUrl) . ">Edit</a> <small>[$sipParamString]</small></p>";

        $html .= $this->wrapItem(WRAP_SETUP_TITLE, $this->formSpec[F_TITLE], true);

        $html .= $this->getFormTag();

        return $html;
    }

    /**
     * If SHOW_DEBUG_INFO=yes: create a link (incl. SIP) to edit the current form. Show also the hidden content of
     * the SIP.
     *
     * @param string $form FORM_NAME_FORM | FORM_NAME_FORM_ELEMENT
     * @param int $recordId id of form or formElement
     * @param array $param
     *
     * @return string String: <a href="?pageId&sip=....">Edit</a> <small>[sip:..., r:..., urlparam:...,
     *                ...]</small>
     * @throws CodeException
     * @throws UserFormException
     */
    public function createFormEditorUrl($form, $recordId, array $param = array()) {

        if (!$this->showDebugInfoFlag) {
            return '';
        }

        $queryStringArray = [
            'id' => $this->store->getVar(SYSTEM_EDIT_FORM_PAGE, STORE_SYSTEM),
            'form' => $form,
            'r' => $recordId,
            PARAM_DB_INDEX_DATA => $this->dbIndexQfq,
        ];
        $queryStringArray = array_merge($queryStringArray, $param);

        $queryString = Support::arrayToQueryString($queryStringArray);

        $sip = $this->store->getSipInstance();
        $url = $sip->queryStringToSip($queryString);

        return $url;
    }

    /**
     * Wrap's $this->wrap[$item][WRAP_SETUP_START] around $value. If $flagOmitEmpty==true && $value=='': return ''.
     *
     * @param string $item
     * @param string $value
     * @param bool|false $flagOmitEmpty
     *
     * @return string
     */
    public function wrapItem($item, $value, $flagOmitEmpty = false) {

        if ($flagOmitEmpty && $value === "") {
            return '';
        }

        return $this->wrap[$item][WRAP_SETUP_START] . $value . $this->wrap[$item][WRAP_SETUP_END];
    }

    /**
     * Returns '<form ...>'-tag with various attributes.
     *
     * @return string
     * @throws CodeException
     * @throws DbException
     */
    public function getFormTag() {
        $md5 = '';

        $attribute = $this->getFormTagAttributes();

        $honeypot = $this->getHoneypotVars();

        $md5 = $this->buildInputRecordHashMd5();

        return '<form ' . OnArray::toString($attribute, '=', ' ', "'") . '>' . $honeypot . $md5;
    }

    /**
     * Build MD5 from the current record. Return HTML Input element.
     *
     * @return string
     * @throws \qfq\CodeException
     * @throws \qfq\DbException
     */
    public function buildInputRecordHashMd5() {

        $recordId = $this->store->getVar(SIP_RECORD_ID, STORE_SIP . STORE_ZERO);
        $md5 = $this->buildRecordHashMd5($this->formSpec[F_TABLE_NAME], $recordId);

        $data = "<input id='" . DIRTY_RECORD_HASH_MD5 . "' name='" . DIRTY_RECORD_HASH_MD5 . "' type='hidden' value='$md5'>";

//        $data = "<input id='" . DIRTY_RECORD_HASH_MD5 . "' name='" . DIRTY_RECORD_HASH_MD5 . "' type='text' value='$md5'>";

        return $data;
    }


    /**
     * @param $tableName
     * @param $recordId
     *
     * @return string
     * @throws \qfq\CodeException
     * @throws \qfq\DbException
     */
    public function buildRecordHashMd5($tableName, $recordId) {
        $record = array();

        if ($recordId != 0) {
            $record = $this->dbArray[$this->dbIndexData]->sql("SELECT * FROM $tableName WHERE id=?", ROW_EXPECT_1, [$recordId], "Record to load not found.");
        }

        return OnArray::getMd5($record);
    }

    /**
     * Create HTML Input vars to detect bot automatic filling of forms.
     *
     * @return string
     * @throws CodeException
     */
    public function getHoneypotVars() {
        $html = '';

        $vars = $this->store->getVar(SYSTEM_SECURITY_VARS_HONEYPOT, STORE_SYSTEM);

        // Iterate over all fake vars
        $arr = explode(',', $vars);
        foreach ($arr as $name) {
            $name = trim($name);
            if ($name === '') {
                continue;
            }
            $html .= "<input name='$name' type='hidden' value='' readonly>";
        }

        return $html;
    }


    /**
     * Build an assoc array with standard form attributes.
     *
     * @return array
     * @throws CodeException
     * @throws DbException
     */
    public function getFormTagAttributes() {

        $attribute['id'] = $this->getFormId();
        $attribute['method'] = 'post';
        $attribute['action'] = $this->getActionUrl();
        $attribute['target'] = '_top';
        $attribute['accept-charset'] = 'UTF-8';
        $attribute[FE_INPUT_AUTOCOMPLETE] = 'on';
        $attribute['enctype'] = $this->getEncType();
        $attribute['data-disable-return-key-submit'] = $this->formSpec[F_ENTER_AS_SUBMIT] == '1' ? "false" : "true"; // attribute meaning is inverted

        return $attribute;
    }

    /**
     * Return a uniq form id
     *
     * @return string
     */
    public function getFormId() {
        if ($this->formId === null) {
            $this->formId = uniqid('qfq-form-');
        }

        return $this->formId;
    }

    /**
     * Builds the HTML 'form'-tag inlcuding all attributes and target.
     *
     * Notice: the SIP will be transferred as POST Parameter.
     *
     * @return string
     */
    public function getActionUrl() {

        return API_DIR . '/save.php';
    }

    /**
     * Determines the enctype.
     *
     * See: https://www.w3.org/wiki/HTML/Elements/form#HTML_Attributes
     *
     * @return string
     * @throws CodeException
     * @throws DbException
     */
    public function getEncType() {

        $result = $this->dbArray[$this->dbIndexQfq]->sql("SELECT id FROM FormElement AS fe WHERE fe.formId=? AND fe.type='upload' LIMIT 1", ROW_REGULAR, [$this->formSpec['id']], 'Look for Formelement.type="upload"');

        return (count($result) === 1) ? 'multipart/form-data' : 'application/x-www-form-urlencoded';

    }

    abstract public function getProcessFilter();

    /**
     * @param array|string $value
     *
     * @return array|string
     * @throws CodeException
     * @throws UserFormException
     */
    private function processReportSyntax($value) {

        if (is_array($value)) {
            $new = array();

            //might happen for e.g Template Groups
            foreach ($value as $item) {
                $new[] = $this->processReportSyntax($item);
            }

            return $new;
        }

        if (substr($value, 0, 8) == SHEBANG_REPORT) {
            if ($this->report === null) {
                $this->report = new Report(array(), $this->evaluate, false);
            }

            if ($this->bodytextParser === null) {
                $this->bodytextParser = new BodytextParser();
            }

            $storeRecord = $this->store->getStore(STORE_RECORD);
            $value = $this->report->process($this->bodytextParser->process($value), false);
            $this->store->setStore($storeRecord, STORE_RECORD, true);
            $this->store->setVar(SYSTEM_REPORT_FULL_LEVEL, '', STORE_SYSTEM);
        }

        return $value;
    }

    /**
     * Process all FormElements in $this->feSpecNative: Collect and return all HTML code & JSON.
     *
     * @param int $recordId
     * @param string $filter FORM_ELEMENTS_NATIVE | FORM_ELEMENTS_SUBRECORD | FORM_ELEMENTS_NATIVE_SUBRECORD
     * @param int $feIdContainer
     * @param array $json
     * @param string $modeCollectFe
     * @param bool $htmlElementNameIdZero
     * @param string $storeUseDefault
     * @param string $mode FORM_LOAD | FORM_UPDATE | FORM_SAVE
     *
     * @return string
     * @throws CodeException
     * @throws DbException
     * @throws \qfq\UserFormException
     */
    public function elements($recordId, $filter = FORM_ELEMENTS_NATIVE, $feIdContainer = 0, array &$json,
                             $modeCollectFe = FLAG_DYNAMIC_UPDATE, $htmlElementNameIdZero = false,
                             $storeUseDefault = STORE_USE_DEFAULT, $mode = FORM_LOAD) {
        $html = '';

        // The following 'FormElement.parameter' will never be used during load (fe.type='upload'). FE_PARAMETER has been already expanded.
        $skip = [FE_SQL_UPDATE, FE_SQL_INSERT, FE_SQL_DELETE, FE_SQL_AFTER, FE_SQL_BEFORE, FE_PARAMETER, FE_FILL_STORE_VAR, FE_FILE_DOWNLOAD_BUTTON];

        // get current data record
        if ($recordId > 0 && $this->store->getVar('id', STORE_RECORD) === false) {
            $tableName = $this->formSpec[F_TABLE_NAME];
            $row = $this->dbArray[$this->dbIndexData]->sql("SELECT * FROM $tableName WHERE id = ?", ROW_EXPECT_1,
                array($recordId), "Form '" . $this->formSpec[F_NAME] . "' failed to load record '$recordId' from table '" .
                $this->formSpec[F_TABLE_NAME] . "'.");
            $this->store->setStore($row, STORE_RECORD);
        }

        $this->checkAutoFocus();

        $parameterLanguageFieldName = $this->store->getVar(SYSTEM_PARAMETER_LANGUAGE_FIELD_NAME, STORE_SYSTEM);

        // Iterate over all FormElements
        foreach ($this->feSpecNative as $fe) {
            $storeUse = $storeUseDefault;

            if (($filter === FORM_ELEMENTS_NATIVE && $fe[FE_TYPE] === 'subrecord')
                || ($filter === FORM_ELEMENTS_SUBRECORD && $fe[FE_TYPE] !== 'subrecord')
//                || ($filter === FORM_ELEMENTS_DYNAMIC_UPDATE && $fe[FE_DYNAMIC_UPDATE] === 'no')
            ) {
                continue; // skip this FE
            }

            $flagOutput = ($fe[FE_TYPE] !== FE_TYPE_EXTRA); // type='extra' will not displayed and not transmitted to the form.

            $debugStack = array();

            // Preparation for Log, Debug
            $this->store->setVar(SYSTEM_FORM_ELEMENT, Logger::formatFormElementName($fe), STORE_SYSTEM);
            $this->store->setVar(SYSTEM_FORM_ELEMENT_ID, $fe[FE_ID], STORE_SYSTEM);

            // Fill STORE_LDAP
            $fe = $this->prepareFillStoreFireLdap($fe);

            // for Upload FormElements, it's necessary to precalculate an optional given 'slaveId'.
            if ($fe[FE_TYPE] === FE_TYPE_UPLOAD) {
                Support::setIfNotSet($fe, FE_SLAVE_ID);
                $slaveId = Support::falseEmptyToZero($this->evaluate->parse($fe[FE_SLAVE_ID]));
                $this->store->setVar(VAR_SLAVE_ID, $slaveId, STORE_VAR);
            }

            $fe[FE_VALUE] = $this->processReportSyntax($fe[FE_VALUE]);
            $fe[FE_NOTE] = $this->processReportSyntax($fe[FE_NOTE]);

            if (isset($fe[FE_FILL_STORE_VAR])) {
                $fe[FE_FILL_STORE_VAR] = $this->evaluate->parse($fe[FE_FILL_STORE_VAR]);
                $this->store->appendToStore($fe[FE_FILL_STORE_VAR], STORE_VAR);
            }

            // ** evaluate current FormElement **
            $formElement = $this->evaluate->parseArray($fe, $skip, $debugStack);
            $formElement = HelperFormElement::setLanguage($formElement, $parameterLanguageFieldName);

            // Some Defaults
            $formElement = Support::setFeDefaults($formElement, $this->formSpec);

//            // Copy global readonly mode.
//            if ($this->formSpec[F_MODE] == F_MODE_READONLY) {
//                $fe[FE_MODE] = FE_MODE_READONLY;
//                $fe[FE_MODE_SQL] = '';
//            }

            if ($flagOutput === true) {
                $this->fillWrapLabelInputNote($formElement[FE_BS_LABEL_COLUMNS], $formElement[FE_BS_INPUT_COLUMNS], $formElement[FE_BS_NOTE_COLUMNS]);
            }

            //In case the current element is a 'RETYPE' element: take the element name of the source FormElement. Needed in the next row to retrieve the default value.
            $name = (isset($formElement[FE_RETYPE_SOURCE_NAME])) ? $formElement[FE_RETYPE_SOURCE_NAME] : $formElement[FE_NAME];

            $value = '';
            Support::setIfNotSet($formElement, FE_VALUE);

            if (is_array($formElement[FE_VALUE])) {
                $formElement[FE_VALUE] = (count($formElement[FE_VALUE])) > 0 ? current($formElement[FE_VALUE][0]) : '';
            }

            $value = $formElement[FE_VALUE];

            if ($value === '') {
                // #2064 / Only take the default, if the FE is a real tablecolumn.
                // #3426 / Dynamic Update: Inputs loose the new content and shows the old value.
                if ($storeUse == STORE_USE_DEFAULT && $this->store->getVar($formElement[FE_NAME], STORE_TABLE_COLUMN_TYPES) === false) {
                    $storeUse = str_replace(STORE_TABLE_DEFAULT, '', $storeUse); // Remove STORE_DEFAULT
                }
                // Retrieve value via FSRVD
                $value = $this->store->getVar($name, $storeUse, $formElement[FE_CHECK_TYPE], $foundInStore);
            }

            if ($formElement[FE_ENCODE] === FE_ENCODE_SPECIALCHAR) {
//                $value = htmlspecialchars_decode($value, ENT_QUOTES);
                $value = Support::htmlEntityEncodeDecode(MODE_DECODE, $value);
            }

            // Typically: $htmlElementNameIdZero = true
            // After Saving a record, staying on the form, the FormElements on the Client are still known as '<feName>:0'.
            $htmlFormElementName = HelperFormElement::buildFormElementName($formElement, ($htmlElementNameIdZero) ? 0 : $recordId);
            $formElement[FE_HTML_ID] = HelperFormElement::buildFormElementId($this->formSpec[F_ID], $formElement[FE_ID],
                ($htmlElementNameIdZero) ? 0 : $recordId,
                $formElement[FE_TG_INDEX]);

            // Construct Marshaller Name: buildElement
            $buildElementFunctionName = 'build' . $this->buildElementFunctionName[$formElement[FE_TYPE]];

            $jsonElement = array();
            $elementExtra = '';
            // Render pure element
            $elementHtml = $this->$buildElementFunctionName($formElement, $htmlFormElementName, $value, $jsonElement, $mode);

            // container elements do not have dynamicUpdate='yes'. Instead they deliver nested elements.
            if ($formElement[FE_CLASS] == FE_CLASS_CONTAINER) {
                if (count($jsonElement) > 0) {
                    $json = array_merge($json, $jsonElement);
                }
            } else {
                // for non-container elements: just add the current json status
                if ($modeCollectFe === FLAG_ALL || ($modeCollectFe == FLAG_DYNAMIC_UPDATE && $fe[FE_DYNAMIC_UPDATE] === 'yes')) {
                    if (isset($jsonElement[0]) && is_array($jsonElement[0])) {
                        // Checkboxes are delivered as array of arrays: unnest them and append them to the existing json array.
                        $json = array_merge($json, $jsonElement);
                    } else {
                        $json[] = $jsonElement;
                    }
                }
            }

            if ($flagOutput) {
                // debugStack as Tooltip
                if ($this->showDebugInfoFlag) {
                    if (count($debugStack) > 0) {
                        $elementHtml .= Support::doTooltip($formElement[FE_HTML_ID] . HTML_ID_EXTENSION_TOOLTIP, implode("\n", $debugStack));
                    }

                    // Build 'FormElement' Edit symbol
                    $feEditUrl = $this->createFormEditorUrl(FORM_NAME_FORM_ELEMENT, $formElement[FE_ID], ['formId' => $formElement[FE_FORM_ID]]);
                    $titleAttr = Support::doAttribute('title', $this->formSpec[FE_NAME] . ' / ' . $formElement[FE_NAME] . ' [' . $formElement[FE_ID] . ']');
                    $icon = Support::wrapTag('<span class="' . GLYPH_ICON . ' ' . GLYPH_ICON_EDIT . '">', '');
                    $elementHtml .= Support::wrapTag("<a class='hidden " . CLASS_FORM_ELEMENT_EDIT . "' href='$feEditUrl' $titleAttr>", $icon);
                }

                // Construct Marshaller Name: buildRow
                $buildRowName = 'buildRow' . $this->buildRowName[$formElement[FE_TYPE]];

                $html .= $formElement[FE_HTML_BEFORE] . $this->$buildRowName($formElement, $elementHtml, $htmlFormElementName) . $formElement[FE_HTML_AFTER];
            }
        }

        // Log / Debug: Last FormElement has been processed.
        $this->store->setVar(SYSTEM_FORM_ELEMENT, '', STORE_SYSTEM);

        return $html;
    }

    /**
     * Checks if LDAP search is requested.
     * Yes: prepare configuration and fire the query.
     * No: do nothing.
     *
     * @param array $formElement
     *
     * @return array
     * @throws CodeException
     * @throws UserFormException
     */
    private function prepareFillStoreFireLdap(array $formElement) {

        if (isset($formElement[FE_FILL_STORE_LDAP]) || isset($formElement[FE_TYPEAHEAD_LDAP])) {
            $keyNames = [F_LDAP_SERVER, F_LDAP_BASE_DN, F_LDAP_ATTRIBUTES,
                F_LDAP_SEARCH, F_TYPEAHEAD_LDAP_SEARCH, F_TYPEAHEAD_LDAP_SEARCH_PER_TOKEN, F_TYPEAHEAD_LDAP_SEARCH_PREFETCH,
                F_TYPEAHEAD_LIMIT, F_TYPEAHEAD_MINLENGTH, F_TYPEAHEAD_LDAP_VALUE_PRINTF,
                F_TYPEAHEAD_LDAP_ID_PRINTF, F_LDAP_TIME_LIMIT, F_LDAP_USE_BIND_CREDENTIALS];
            $formElement = OnArray::copyArrayItemsIfNotAlreadyExist($this->formSpec, $formElement, $keyNames);
        } else {
            return $formElement; // nothing to do.
        }

        if (isset($formElement[FE_FILL_STORE_LDAP])) {

            // Extract necessary elements
            $config = OnArray::getArrayItems($formElement, [FE_LDAP_SERVER, FE_LDAP_BASE_DN, FE_LDAP_SEARCH, FE_LDAP_ATTRIBUTES]);
            $config = $this->evaluate->parseArray($config);

            if ($formElement[FE_LDAP_USE_BIND_CREDENTIALS] == 1) {
                $config[SYSTEM_LDAP_1_RDN] = $this->store->getVar(SYSTEM_LDAP_1_RDN, STORE_SYSTEM);
                $config[SYSTEM_LDAP_1_PASSWORD] = $this->store->getVar(SYSTEM_LDAP_1_PASSWORD, STORE_SYSTEM);
            }

            $ldap = new Ldap();
            $arr = $ldap->process($config, '', MODE_LDAP_SINGLE);
            $this->store->setStore($arr, STORE_LDAP, true);
        }

        return $formElement;
    }

    /**
     * Check if there is an explicit 'autofocus' definition in at least one FE.
     * Found: do nothing, it will be rendered at the correct position.
     * Not found: set 'autofocus' on the first FE.
     *
     * Accepted misbehaviour on forms with pills: if there is at least one editable element on the first pill,
     *   the other pills are not checked - independent if there was a definition on the first pill or not.
     *   Reason: checks happens per pill - if there is no explizit definition on the first pill, take the first
     *   editable element of that pill.
     */
    private function checkAutoFocus() {
        static $found = false;
        $idx = false;

        if ($found) {
            return;
        }

        // Search if there is an explicit autofocus definition.
        for ($i = 0; $i < count($this->feSpecNative); ++$i) {
            // Only check native elements which will be shown
            if ($this->feSpecNative[$i][FE_CLASS] == FE_CLASS_NATIVE &&
                ($this->feSpecNative[$i][FE_MODE] == FE_MODE_SHOW || $this->feSpecNative[$i][FE_MODE] == FE_MODE_REQUIRED)
            ) {
                // Check if there is an explicit definition.
                if (isset($this->feSpecNative[$i][FE_AUTOFOCUS])) {
                    if ($this->feSpecNative[$i][FE_AUTOFOCUS] == '' || $this->feSpecNative[$i][FE_AUTOFOCUS] == '1') {
                        $this->feSpecNative[$i][FE_AUTOFOCUS] = '1'; // fix to '=1'
                    } else {
                        unset($this->feSpecNative[$i][FE_AUTOFOCUS]);
                    }
                    $found = true;

                    return;
                }

                if ($idx === false) {
                    $idx = $i;
                }
            }
        }

        // No explicit definition found: take the first found editable element.
        if ($idx !== false) {
            $found = true;
            // No explicit definition found: set autofocus.
            $this->feSpecNative[$idx][FE_AUTOFOCUS] = '1';
        }
    }

    /**
     * @param $label
     * @param $input
     * @param $note
     * @return
     */
    abstract public function fillWrapLabelInputNote($label, $input, $note);

    /**
     * Copy a subset of current STORE_TYPO3 variables to SIP. Set a hidden form field to submit the assigned SIP to
     * save/update.
     *
     * @throws CodeException
     * @throws UserFormException
     */
    private function prepareT3VarsForSave() {

        $t3VarsSip = $this->store->copyT3VarsToSip();

        return $this->buildNativeHidden(CLIENT_TYPO3VARS, $t3VarsSip);

    }

    /**
     * Builds a real HTML hidden form element. Useful for checkboxes, Multiple-Select and Radios.
     *
     * @param        $htmlFormElementName
     * @param string $value
     *
     * @return string
     */
    public function buildNativeHidden($htmlFormElementName, $value) {
        return '<input type="hidden" name="' . $htmlFormElementName . '" value="' . htmlentities($value) . '">';
    }

    /**
     *
     */
    abstract public function tail();

    /**
     *
     */
    abstract public function doSubrecords();

    /**
     * Get all elements from STORE_ADDITIONAL_FORM_ELEMENTS and return them as a string.
     *
     * @return string
     * @throws CodeException
     * @throws \qfq\UserFormException
     */
    private function buildAdditionalFormElements() {

        $data = $this->store->getStore(STORE_ADDITIONAL_FORM_ELEMENTS);

        return is_array($data) ? implode('', $data) : '';
    }

    /**
     * Create a hidden sip, based on latest STORE_SIP Values. Return complete HTML 'hidden' element.
     *
     * @param array $json
     *
     * @return string  <input type='hidden' name='s' value='<sip>'>
     * @throws CodeException
     * @throws \qfq\UserFormException
     */
    public function buildHiddenSip(array &$json) {

        $sipArray = $this->store->getStore(STORE_SIP);

        // do not include system vars
        unset($sipArray[SIP_SIP]);
        unset($sipArray[SIP_URLPARAM]);

        $queryString = Support::arrayToQueryString($sipArray);
        $sip = $this->store->getSipInstance();

        $sipValue = $sip->queryStringToSip($queryString, RETURN_SIP);

        $json[] = $this->getFormElementForJson(CLIENT_SIP, $sipValue, [FE_MODE => FE_MODE_SHOW]);

        return $this->buildNativeHidden(CLIENT_SIP, $sipValue);
    }

    /**
     * Create an array with standard elements for 'mode' (hidden, disabled, required) and add 'form-element',
     * 'value'.
     * 'Generic Element Update': add via API_ELEMENT_UPDATE 'label' and 'note'.
     * All collected data as array - will be later converted to JSON.
     *
     * @param string $htmlFormElementName
     * @param string|array $value
     * @param array $formElement
     *
     * @return array
     * @throws CodeException
     * @throws UserFormException
     */
    private function getFormElementForJson($htmlFormElementName, $value, array $formElement) {

        $json = $this->getJsonFeMode($formElement[FE_MODE]); // disabled, required

        $json[API_FORM_UPDATE_FORM_ELEMENT] = $htmlFormElementName;

        if (isset($formElement[FE_FLAG_ROW_OPEN_TAG]) && isset($formElement[FE_FLAG_ROW_CLOSE_TAG])) {
            $flagRowUpdate = ($formElement[FE_FLAG_ROW_OPEN_TAG] && $formElement[FE_FLAG_ROW_CLOSE_TAG]);
        } else {
            $flagRowUpdate = true;
        }

        // 'value' update via 'form-update' on the full row: only if there is no other FE in that row
        if ($flagRowUpdate) {
            $json[API_FORM_UPDATE_VALUE] = $value;