<?php namespace HashOver;

// Copyright (C) 2015-2021 Jacob Barkdull
// This file is part of HashOver.
//
// HashOver is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// HashOver 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with HashOver. If not, see <http://www.gnu.org/licenses/>.


class FormUI
{
protected $mode;
protected $setup;
protected $commentCounts;

protected $locale;
protected $avatars;
protected $misc;
protected $login;
protected $cookies;
protected $pageTitle;
protected $pageURL;

protected $emphasizedField;
protected $defaultLoginInputs;

public $postComment;
public $popularComments;
public $comments;

public function __construct ($mode = 'javascript', Setup $setup, array $counts)
{
// Store parameters as properties
$this->mode = $mode;
$this->setup = $setup;
$this->commentCounts = $counts;

// Instantiate various classes
$this->locale = new Locale ($setup);
$this->login = new Login ($setup);
$this->cookies = new Cookies ($setup, $this->login);
$this->avatars = new Avatars ($setup);
$this->pageTitle = $this->setup->pageTitle;
$this->pageURL = $this->setup->pageURL;

// Attempt to get form field submission failed on
$failedField = $this->cookies->getValue ('failed-on');

// Set the field to emphasize after a failed post
if ($failedField !== '') {
$this->emphasizedField = $failedField;
}

// "Post a comment" locale strings
$this->postComment = $this->locale->text['post-a-comment'];

// Use "Post a comment on <page title>" locale instead if configured to
if ($this->setup->displaysTitle !== false and !empty ($this->pageTitle)) {
$this->postComment = sprintf (
$this->locale->text['post-a-comment-on'],
$this->pageTitle
);
}

// Create default login inputs elements
$this->defaultLoginInputs = $this->loginInputs ();
}

// Returns pseudo-namespace prefixed string
public function prefix ($id = '', $template = true)
{
// Return template prefix in JavaScript mode
if ($template === true and $this->mode !== 'php') {
return '{hashover}-' . $id;
}

// Initial prefix
$prefix = 'hashover';

// Return simple prefix if we're on first instance
if ($this->setup->instanceNumber > 1) {
$prefix .= '-' . $this->setup->instanceNumber;
}

// Return prefixed ID if one is given
if (!empty ($id)) {
return $prefix . '-' . $id;
}

// Otherwise, return prefix by itself
return $prefix;
}

// Creates input elements for user login information
protected function loginInputs ($permalink = '', $edit_form = false, $name = '', $email = '', $website = '')
{
// Reply/edit form indicator
$is_form = !empty ($permalink);

// Prepend dash to permalink if present
$permalink = $is_form ? '-' . $permalink : '';

// Login input attribute information
$login_input_attributes = array (
'name' => array (
'wrapper-class' => 'hashover-name-input',
'label-class' => 'hashover-name-label',
'placeholder' => $this->locale->text['name'],
'input-id' => $this->prefix ('main-name' . $permalink, $is_form),
'input-type' => 'text',
'input-name' => 'name',
'input-title' => $this->locale->text['name-tip'],
'input-value' => Misc::makeXSSsafe ($this->login->name),
'autocomplete' => 'username'
),

'password' => array (
'wrapper-class' => 'hashover-password-input',
'label-class' => 'hashover-password-label',
'placeholder' => $this->locale->text['password'],
'input-id' => $this->prefix ('main-password' . $permalink, $is_form),
'input-type' => 'password',
'input-name' => 'password',
'input-title' => $this->locale->text['password-tip'],
'input-value' => '',
'autocomplete' => 'current-password'
),

'email' => array (
'wrapper-class' => 'hashover-email-input',
'label-class' => 'hashover-email-label',
'placeholder' => $this->locale->text['email'],
'input-id' => $this->prefix ('main-email' . $permalink, $is_form),
'input-type' => 'email',
'input-name' => 'email',
'input-title' => $this->locale->text['email-tip'],
'input-value' => Misc::makeXSSsafe ($this->login->email),
'autocomplete' => 'off'
),

'website' => array (
'wrapper-class' => 'hashover-website-input',
'label-class' => 'hashover-website-label',
'placeholder' => $this->locale->text['website'],
'input-id' => $this->prefix ('main-website' . $permalink, $is_form),
'input-type' => 'url',
'input-name' => 'website',
'input-title' => $this->locale->text['website-tip'],
'input-value' => Misc::makeXSSsafe ($this->login->website),
'autocomplete' => 'off'
)
);

// Change input values to specified values
if ($edit_form === true) {
$login_input_attributes['name']['input-value'] = $name;
$login_input_attributes['password']['placeholder'] = $this->locale->text['confirm-password'];
$login_input_attributes['password']['input-title'] = $this->locale->text['confirm-password'];
$login_input_attributes['email']['input-value'] = $email;
$login_input_attributes['website']['input-value'] = $website;
}

// Create wrapper element for styling login inputs
$login_inputs = new HTMLTag ('div', array (
'class' => 'hashover-inputs'
));

// Create and append login input elements to main form inputs wrapper element
foreach ($login_input_attributes as $field => $attributes) {
// Skip disabled input tags
if ($this->setup->formFields[$field] === 'off') {
continue;
}

// Skip password field when logged in as admin
if ($field === 'password' and $this->login->userIsAdmin === true) {
continue;
}

// Create cell element for inputs
$input_cell = new HTMLTag ('div', array (
'class' => 'hashover-input-cell'
));

// Check if form labels are enabled
if ($this->setup->usesLabels === true) {
// If so, create label element for input
$label = new HTMLTag ('label', array (
'for' => $attributes['input-id'],
'class' => $attributes['label-class'],
'innerHTML' => $attributes['placeholder']
), false);

// Add label to cell element
$input_cell->appendChild ($label);
}

// Add a class for indicating a required field
if ($this->setup->formFields[$field] === 'required') {
$input_cell->appendAttribute ('class', 'hashover-required-input');
}

// Create wrapper element for input
$input_wrapper = new HTMLTag ('div', array (
'class' => $attributes['wrapper-class']
));

// Add a class for indicating a post failure
if ($this->emphasizedField === $field) {
$input_wrapper->appendAttribute ('class', 'hashover-emphasized-input');
}

// Create input element
$input = new HTMLTag ('input', array (
'id' => $attributes['input-id'],
'class' => 'hashover-input-info',
'type' => $attributes['input-type'],
'name' => $attributes['input-name'],
'value' => $attributes['input-value'],
'autocomplete' => $attributes['autocomplete'],
'title' => $attributes['input-title'],
'placeholder' => $attributes['placeholder']
), false, true);

// Add input to wrapper element
$input_wrapper->appendChild ($input);

// Add input to cell element
$input_cell->appendChild ($input_wrapper);

// Add input cell to main inputs wrapper element
$login_inputs->appendChild ($input_cell);
}

return $login_inputs;
}

// Creates avatar element
protected function avatar ($text)
{
// If avatars set to images
if ($this->setup->iconMode === 'image') {
// Logged in
if ($this->login->userIsLoggedIn === true) {
// Image source is avatar image
$hash = !empty ($this->login->email) ? md5 (mb_strtolower (trim ($this->login->email))) : '';
$avatar_src = $this->avatars->getGravatar ($hash);
} else {
// Logged out
// Image source is local default image
$avatar_src = $this->setup->getImagePath ('first-comment');
}

// Create avatar image element
$avatar = new HTMLTag ('div', array (
'style' => 'background-image: url(\'' . $avatar_src . '\');'
), false);
} else {
// Avatars set to count
// Create element displaying comment number user will be
$avatar = new HTMLTag ('span', $text, false);
}

return $avatar;
}

// Creates "Notify me of replies" checkbox
protected function subscribeLabel ($permalink = '', $type = 'main', $checked = true)
{
// Reply/edit form indicator
$is_form = !empty ($permalink);

// The checkbox ID
$id = $this->prefix ($type . '-subscribe', $is_form);

// Append permalink to the ID if one was given
if ($is_form === true) {
$id .= '-' . $permalink;
}

// Create subscribe checkbox label element
$subscribe_label = new HTMLTag ('label', array (
'for' => $id,
'class' => 'hashover-' . $type . '-label',
'title' => $this->locale->text['subscribe-tip']
));

// Create subscribe element checkbox
$subscribe = new HTMLTag ('input', array (
'id' => $id,
'type' => 'checkbox',
'name' => 'subscribe'
), false, true);

// Tick the checkbox
if ($checked === true) {
$subscribe->createAttribute ('checked', 'true');
}

// Add subscribe checkbox element to subscribe checkbox label element
$subscribe_label->appendChild ($subscribe);

// Add text to subscribe checkbox label element
$subscribe_label->appendInnerHTML ($this->locale->text['subscribe']);

return $subscribe_label;
}

// Creates a table-like cell for the allowed HTML/markdown panel
protected function formatCell ($format, $locale_key)
{
// Create cell title
$title = new HTMLTag ('p', array ('class' => 'hashover-title'));

// "Allowed HTML/Markdown" locale string
$title->innerHTML ($this->locale->text['allowed-' . $format]);

// Create allowed HTML/markdown text paragraph
$paragraph = new HTMLTag ('p', array (
'innerHTML' => $this->locale->text[$locale_key])
);

// And return both elements in a <div> tag
return new HTMLTag ('div', array (
'children' => array ($title, $paragraph)
));
}

// Creats a comment form, ie. main/reply/edit
protected function commentForm (HTMLTag $form, $type, $placeholder, $text, $permalink = '')
{
// Reply/edit form indicator
$is_form = !empty ($permalink);

// Prepend dash to permalink if present
$permalink = $is_form ? '-' . $permalink : '';

// Form title locale key
$title_locale = ($type === 'reply') ? 'reply-form' : 'comment-form';

// Create textarea
$textarea = new HTMLTag ('textarea', array (
'id' => $this->prefix ($type . '-comment' . $permalink, $is_form),
'class' => 'hashover-textarea hashover-' . $type . '-textarea',
'cols' => '63',
'name' => 'comment',
'rows' => '6',
'title' => $this->locale->text[$title_locale]
), false);

// Set the placeholder attribute if one is given
if (!empty ($placeholder)) {
$textarea->createAttribute ('placeholder', $placeholder);
}

if ($type === 'main') {
// Add a class for indicating a post failure
if ($this->emphasizedField === 'comment') {
$textarea->appendAttribute ('class', 'hashover-emphasized-input');
}

// If the comment was a reply, have the textarea use the reply textarea locale
if ($this->cookies->getValue ('replied') !== '') {
$reply_form_placeholder = $this->locale->text['reply-form'];
$textarea->createAttribute ('placeholder', $reply_form_placeholder);
}
}

// Set textarea content if given any text
if (!empty ($text)) {
$textarea->innerHTML ($text);
}

// Add textarea element to form element
$form->appendChild ($textarea);

// Create element for various messages when needed
if ($type !== 'main') {
$message = new HTMLTag ('div', array (
'id' => $this->prefix ($type . '-message-container' . $permalink, $is_form),
'class' => 'hashover-message',

'children' => array (
new HTMLTag ('div', array (
'id' => $this->prefix ($type . '-message' . $permalink, $is_form)
))
)
));

// Add message element to form element
$form->appendChild ($message);
}

// Create allowed HTML message element
$allowed_formatting_message = new HTMLTag ('div', array (
'id' => $this->prefix ($type . '-formatting-message' . $permalink, $is_form),
'class' => 'hashover-formatting-message'
));

// Create formatting table
$allowed_formatting_table = new HTMLTag ('div', array (
'class' => 'hashover-formatting-table',

'children' => array (
$this->formatCell ('html', 'html-format')
)
));

// Append Markdown cell if Markdown is enabled
if ($this->setup->usesMarkdown !== false) {
$markdown_cell = $this->formatCell ('markdown', 'markdown-format');
$allowed_formatting_table->appendChild ($markdown_cell);
}

// Append formatting table to formatting message
$allowed_formatting_message->appendChild ($allowed_formatting_table);

// Ensure the allowed HTML message is open in PHP mode
if ($this->mode === 'php') {
$allowed_formatting_message->appendAttribute ('class', 'hashover-message-open');
$allowed_formatting_message->appendAttribute ('class', 'hashover-php-message-open');
}

// Add allowed HTML message element to form element
$form->appendChild ($allowed_formatting_message);
}

// Creates hidden page info fields, ie. page URL, title, reply comment
protected function pageInfoFields (HTMLTag $form, $url = '{url}', $thread = '{thread}', $title = '{title}')
{
// Create hidden page URL input element
$url_input = new HTMLTag ('input', array (
'type' => 'hidden',
'name' => 'url',
'value' => $url
), false, true);

// Add hidden page URL input element to form element
$form->appendChild ($url_input);

// Create hidden comment thread input element
$thread_input = new HTMLTag ('input', array (
'type' => 'hidden',
'name' => 'thread',
'value' => $thread
), false, true);

// Add hidden comments thread input element to form element
$form->appendChild ($thread_input);

// Create hidden page title input element
$title_input = new HTMLTag ('input', array (
'type' => 'hidden',
'name' => 'title',
'value' => $title
), false, true);

// Add hidden page title input element to form element
$form->appendChild ($title_input);

// Check if the script is being remotely accessed
if ($this->setup->remoteAccess === true) {
// Create hidden input element indicating remote access
$remote_access_input = new HTMLTag ('input', array (
'type' => 'hidden',
'name' => 'remote-access',
'value' => 'true'
), false, true);

// Add remote access input element to form element
$form->appendChild ($remote_access_input);
}

// Check if config queries are present
if (!empty ($this->setup->cfgQueries)) {
// If so, run through config queries
foreach ($this->setup->cfgQueries as $key => $value) {
// Add hidden input to form for each config query
$form->appendChild (new HTMLTag ('input', array (
'type' => 'hidden',
'name' => sprintf ('cfg[%s]', $key),
'value' => $value
)));
}
}
}

// Creates "Formatting" link to open the allowed HTML/markdown panel
protected function formatting ($type, $permalink = '')
{
// Reply/edit form indicator
$is_form = !empty ($permalink);

// Prepend dash to permalink if present
$permalink = $is_form ? '-' . $permalink : '';

// "Formatting" hyperlink locale
$allowed_format = $this->locale->text['comment-formatting'];

// Create allowed HTML message revealer hyperlink
$allowed_formatting = new HTMLTag ('span', array (
'id' => $this->prefix ($type . '-formatting' . $permalink, $is_form),
'class' => 'hashover-fake-link hashover-formatting',
'title' => $allowed_format,
'innerHTML' => $allowed_format
));

// Return the hyperlink
return $allowed_formatting;
}

// Re-encode a URL
protected function safeURLEncode ($url)
{
return urlencode (urldecode ($url));
}

// Creates the main HashOver element
protected function createMainElement ()
{
// Create element that HashOver comments will appear in
$main = new HTMLTag ('div', array (
'id' => $this->prefix (),
'class' => 'hashover'
), false);

// Add class indictating desktop and mobile styling
if ($this->setup->isMobile === true) {
$main->appendAttribute ('class', 'hashover-mobile');
} else {
$main->appendAttribute ('class', 'hashover-desktop');
}

// Add class for raster or vector images
if ($this->setup->imageFormat === 'svg') {
$main->appendAttribute ('class', 'hashover-vector');
} else {
$main->appendAttribute ('class', 'hashover-raster');
}

// Add class to indicate user login status
if ($this->login->userIsLoggedIn === true) {
$main->appendAttribute ('class', 'hashover-logged-in');
} else {
$main->appendAttribute ('class', 'hashover-logged-out');
}

// Create element for jump anchor
if ($this->setup->instanceNumber === 1) {
$jump_anchor = new HTMLTag ('div', array (
'id' => 'comments'
));

// Add jump anchor to HashOver element
$main->appendChild ($jump_anchor);
}

return $main;
}

// Creates initial HTML elements, such as comment form and end links
public function initialHTML ($hashover_wrapper = true)
{
// Create main HashOver element
$hashover_element = $this->createMainElement ();

// Check if a login is required and user is not logged in
if ($this->setup->requiresLogin === true
and $this->login->userIsLoggedIn === false)
{
// If so, create required login message element
$hashover_element->appendChild (new HTMLTag ('div', array (
'class' => 'hashover-requires-login-message',
'innerHTML' => $this->locale->text['login-required']
)));

// Return all HTML with the HashOver wrapper element
if ($hashover_wrapper === true) {
return $hashover_element->asHTML ();
}

// Return just the HashOver wrapper element's innerHTML
return $hashover_element->innerHTML;
}

// Create primary form wrapper element
$form_section = new HTMLTag ('div', array (
'id' => $this->prefix ('form-section', false),
'class' => 'hashover-form-section'
));

// Hide primary form wrapper if comments are to be initially hidden
if ($this->mode !== 'php' and $this->setup->collapsesInterface === true) {
$form_section->createAttribute ('style', 'display: none;');
}

// Create element for "Post Comment" title
$post_title = new HTMLTag ('span', array (
'class' => array (
'hashover-title',
'hashover-main-title',
'hashover-dashed-title'
),

'innerHTML' => $this->postComment
));

// Add "Post Comment" element to primary form wrapper
$form_section->appendChild ($post_title);

// Create element for various messages when needed
$message_container = new HTMLTag ('div', array (
'id' => $this->prefix ('message-container', false),
'class' => 'hashover-title hashover-message'
));

// Create element for message text
$message_element = new HTMLTag ('div', array (
'id' => $this->prefix ('message', false),
'class' => 'hashover-main-message'
));

// Check if message cookie is set
if ($this->cookies->getValue ('message') !== ''
or $this->cookies->getValue ('error') !== '')
{
// If so, set the message element to open in PHP mode
if ($this->mode === 'php') {
$message_container->appendAttribute ('class', array (
'hashover-message-open',
'hashover-php-message-open'
));
}

// Check if the message is a normal message
if ($this->cookies->getValue ('message') !== '') {
// If so, get an XSS safe version of the message
$message = Misc::makeXSSsafe ($this->cookies->getValue ('message'));
} else {
// If not, get an XSS safe version of the error message
$message = Misc::makeXSSsafe ($this->cookies->getValue ('error'));

// And set a class to the message element indicating an error
$message_container->appendAttribute ('class', 'hashover-message-error');
}

// And put current message into message element
$message_element->innerHTML ($message);
}

// Add message text element to message element
$message_container->appendChild ($message_element);

// Add message element to primary form wrapper
$form_section->appendChild ($message_container);

// Create main HashOver form
$main_form = new HTMLTag ('form', array (
'id' => $this->prefix ('form', false),
'class' => 'hashover-form hashover-balloon',
'name' => 'hashover-form',
'action' => $this->setup->getBackendPath ('form-actions.php'),
'method' => 'post'
));

// Create wrapper element for styling inputs
$main_inputs = new HTMLTag ('div', array (
'class' => 'hashover-inputs'
));

// If avatars are enabled
if ($this->setup->iconMode !== 'none') {
// Create avatar element for main HashOver form
$main_avatar = new HTMLTag ('div', array (
'class' => 'hashover-avatar-image'
));

// Add count element to avatar element
$main_avatar->appendChild ($this->avatar ($this->commentCounts['primary']));

// Add avatar element to inputs wrapper element
$main_inputs->appendChild ($main_avatar);
}

// Logged in
if ($this->login->userIsLoggedIn === true) {
if (!empty ($this->login->name)) {
$user_name = Misc::makeXSSsafe ($this->login->name);
} else {
$user_name = $this->setup->defaultName;
}

$user_website = Misc::makeXSSsafe ($this->login->website);
$name_class = 'hashover-name-plain';
$is_twitter = false;

// Check if user's name is a Twitter handle
if ($user_name[0] === '@') {
$user_name = mb_substr ($user_name, 1);
$name_class = 'hashover-name-twitter';
$is_twitter = true;
$name_length = mb_strlen ($user_name);

if ($name_length > 1 and $name_length <= 30) {
if (empty ($user_website)) {
$user_website = 'https://twitter.com/' . $user_name;
}
}
}

// Create element for logged user's name
$main_form_column_spanner = new HTMLTag ('div', array (
'class' => 'hashover-comment-name hashover-top-name'
), false);

// Check if user gave website
if (!empty ($user_website)) {
if ($is_twitter === false) {
$name_class = 'hashover-name-website';
}

// Create link to user's website
$main_form_hyperlink = new HTMLTag ('a', array (
'rel' => 'noopener noreferrer nofollow',
'href' => $user_website,
'target' => '_blank',
'title' => $user_name,
'innerHTML' => $user_name
), false);

// Add username hyperlink to main form column spanner
$main_form_column_spanner->appendChild ($main_form_hyperlink);
} else {
// No website
$main_form_column_spanner->innerHTML ($user_name);
}

// Set classes user's name spanner
$main_form_column_spanner->appendAttribute ('class', $name_class);

// Add main form column spanner to inputs wrapper element
$main_inputs->appendChild ($main_form_column_spanner);
} else {
// Logged out
// Use default login inputs
$main_inputs->appendInnerHTML ($this->defaultLoginInputs->innerHTML);
}

// Add inputs wrapper to form element
$main_form->appendChild ($main_inputs);

// Create fake "required fields" element as a SPAM trap
$required_fields = new HTMLTag ('div', array (
'class' => 'hashover-required-fields'
));

// Fake "required fields" to create
$fake_fields = array (
'summary' => 'text',
'age' => 'hidden',
'lastname' => 'text',
'address' => 'text',
'zip' => 'hidden',
);

// Create and append fake input elements to fake required fields
foreach ($fake_fields as $name => $type) {
$fake_input = new HTMLTag ('input', array (
'type' => $type,
'name' => $name,
'value' => ''
), false, true);

// Add fake summary input element to fake required fields
$required_fields->appendInnerHTML ($fake_input->asHTML ());
}

// Add fake input elements to form element
$main_form->appendChild ($required_fields);

// Post button locale
$post_button = $this->locale->text['post-button'];

// Check if form labels are enabled
if ($this->setup->usesLabels === true) {
// If so, create label element for comment textarea
$main_comment_label = new HTMLTag ('label', array (
'for' => 'hashover-main-comment',
'class' => 'hashover-comment-label',
'innerHTML' => $post_button
), false);

// Add comment label to form element
$main_form->appendChild ($main_comment_label);
}

// Get comment text if a comment cookie is set
$comment_text = Misc::makeXSSsafe ($this->cookies->getValue ('comment'));

// Comment form placeholder text
$comment_form = $this->locale->text['comment-form'];

// Create main textarea element and add it to form element
$this->commentForm ($main_form, 'main', $comment_form, $comment_text);

// Add page info fields to main form
$this->pageInfoFields ($main_form, $this->setup->pageURL, $this->setup->threadName, $this->setup->pageTitle);

// Check if comment is a failed reply
if ($this->cookies->getValue ('replied') !== '') {
// If so, get the comment being replied to
$replied = $this->cookies->getValue ('replied');

// Create hidden reply to input element
$reply_to_input = new HTMLTag ('input', array (
'type' => 'hidden',
'name' => 'reply-to',
'value' => Misc::makeXSSsafe ($replied)
), false, true);

// And add hidden reply to input element to form element
$main_form->appendChild ($reply_to_input);
}

// Create wrapper element for main form footer
$main_form_footer = new HTMLTag ('div', array (
'class' => 'hashover-form-footer'
));

// Create wrapper for form links
$main_form_links_wrapper = new HTMLTag ('span', array (
'class' => 'hashover-form-links'
));

// Add checkbox label element to main form buttons wrapper element
if ($this->setup->emailField !== 'off') {
if ($this->login->userIsLoggedIn === false or !empty ($this->login->email)) {
$subscribed = ($this->setup->subscribesUser === true);
$subscribe_label = $this->subscribeLabel ('', 'main', $subscribed);
$main_form_links_wrapper->appendChild ($subscribe_label);
}
}

// Create and add allowed HTML revealer hyperlink
if ($this->mode !== 'php') {
$main_form_links_wrapper->appendChild ($this->formatting ('main'));
}

// Add main form links wrapper to main form footer element
$main_form_footer->appendChild ($main_form_links_wrapper);

// Create wrapper for form buttons
$main_form_buttons_wrapper = new HTMLTag ('span', array (
'class' => 'hashover-form-buttons'
));

// Create "Login" / "Logout" button element
if ($this->setup->allowsLogin !== false or $this->login->userIsLoggedIn === true) {
$login_button = new HTMLTag ('input', array (
'id' => $this->prefix ('login-button', false),
'class' => 'hashover-submit',
'type' => 'submit'
), false, true);

// Check login state
if ($this->login->userIsLoggedIn === true) {
// Logged in
$login_button->appendAttribute ('class', 'hashover-logout');
$logout_locale = $this->locale->text['logout'];

// Create logged in attributes
$login_button->createAttributes (array (
'name' => 'logout',
'value' => $logout_locale,
'title' => $logout_locale
));
} else {
// Logged out
$login_button->appendAttribute ('class', 'hashover-login');

// Create logged out attributes
$login_button->createAttributes (array (
'name' => 'login',
'value' => $this->locale->text['login'],
'title' => $this->locale->text['login-tip']
));
}

// Add "Login" / "Logout" element to main form footer element
$main_form_buttons_wrapper->appendChild ($login_button);
}

// Create "Post Comment" button element
$main_post_button = new HTMLTag ('input', array (
'id' => $this->prefix ('post-button', false),
'class' => 'hashover-submit hashover-post-button',
'type' => 'submit',
'name' => 'post',
'value' => $post_button,
'title' => $post_button
), false, true);

// Add "Post Comment" element to main form buttons wrapper element
$main_form_buttons_wrapper->appendChild ($main_post_button);

// Add main form button wrapper to main form footer element
$main_form_footer->appendChild ($main_form_buttons_wrapper);

// Add main form footer to main form element
$main_form->appendChild ($main_form_footer);

// Add main form element to primary form wrapper
$form_section->appendChild ($main_form);

// Check if form position setting set to 'top'
if ($this->setup->formPosition !== 'bottom') {
// Add primary form wrapper to HashOver element
$hashover_element->appendChild ($form_section);
}

if ($this->commentCounts['popular'] > 0) {
// Create wrapper element for popular comments
$popular_section = new HTMLTag ('div', array (
'id' => $this->prefix ('popular-section', false),
'class' => 'hashover-popular-section'
), false);

// Hide popular comments wrapper if comments are to be initially hidden
if ($this->mode !== 'php') {
if ($this->setup->collapsesInterface === true or $this->setup->collapseLimit <= 0) {
$popular_section->createAttribute ('style', 'display: none;');
}
}

// Create wrapper element for popular comments title
$pop_count_wrapper = new HTMLTag ('div', array (
'class' => 'hashover-dashed-title'
));

// Create element for popular comments title
$pop_count_element = new HTMLTag ('span', array (
'class' => 'hashover-title'
));

// Check if there is more than one popular comment
if ($this->commentCounts['popular'] !== 1) {
// If so, use "Most Popular Comments" locale string
$pop_count_element->innerHTML ($this->locale->text['most-popular-comments']);
} else {
// If not, use "Most Popular Comment" locale string
$pop_count_element->innerHTML ($this->locale->text['most-popular-comment']);
}

// Add popular comments title element to wrapper element
$pop_count_wrapper->appendChild ($pop_count_element);

// Add popular comments title wrapper element to popular comments section
$popular_section->appendChild ($pop_count_wrapper);

// Create element for popular comments to appear in
$popular_comments = new HTMLTag ('div', array (
'id' => $this->prefix ('top-comments', false),
'class' => 'hashover-top-comments'
), false);

// Add comments to HashOver element
if (!empty ($this->popularComments)) {
$popular_comments->innerHTML (trim ($this->popularComments));
}

// Add popular comments element to popular comments section
$popular_section->appendChild ($popular_comments);

// Add popular comments section to HashOver element
$hashover_element->appendChild ($popular_section);
}

// Create wrapper element for comments
$comments_section = new HTMLTag ('div', array (
'id' => $this->prefix ('comments-section', false),
'class' => 'hashover-comments-section'
), false);

// Create wrapper element for comment count and sort dropdown menu
$count_sort_wrapper = new HTMLTag ('div', array (
'id' => $this->prefix ('count-wrapper', false),
'class' => 'hashover-count-sort hashover-dashed-title'
));

// Create element for comment count
$count_element = new HTMLTag ('span', array (
'id' => $this->prefix ('count', false),
'class' => 'hashover-count'
));

// Add comment count to comment count element
if ($this->commentCounts['total'] > 1) {
$count_element->innerHTML ($this->commentCounts['show-count']);
}

// Add comment count element to wrapper element
$count_sort_wrapper->appendChild ($count_element);

// Hide comment count if there are no comments
if ($this->commentCounts['total'] <= 1) {
$count_sort_wrapper->createAttribute ('style', 'display: none;');
}

// JavaScript mode specific HTML
if ($this->mode !== 'php') {
// Hide wrapper if comments are to be initially hidden
if ($this->setup->collapsesInterface === true) {
$comments_section->createAttribute ('style', 'display: none;');
}

// Hide comment count if collapse limit is set to zero
if ($this->setup->collapseLimit <= 0) {
$count_sort_wrapper->createAttribute ('style', 'display: none;');
}

// Check if there is more than one comment
if ($this->commentCounts['total'] > 2) {
// If so, create wrapper element for sort dropdown menu
$sort_wrapper = new HTMLTag ('span', array (
'id' => $this->prefix ('sort', false),
'class' => 'hashover-select-wrapper hashover-sort-select'
));

// Create sort dropdown menu element
$sort_select = new HTMLTag ('select', array (
'id' => $this->prefix ('sort-select', false),
'name' => 'sort',
'size' => '1',
'title' => $this->locale->text['sort']
));

// Array of select tag sort options
$sort_options = array (
'ascending' => $this->locale->text['sort-ascending'],
'descending' => $this->locale->text['sort-descending'],
'by-date' => $this->locale->text['sort-by-date'],
'by-likes' => $this->locale->text['sort-by-likes'],
'by-replies' => $this->locale->text['sort-by-replies'],
'by-name' => $this->locale->text['sort-by-name']
);

// Run through each sort option
foreach ($sort_options as $value => $html) {
// Create option for sort dropdown menu element
$option = new HTMLTag ('option', array (
'value' => $value,
'innerHTML' => $html
), false);

// Set option as selected if its the configured default
if ($value === $this->setup->defaultSorting) {
$option->createAttribute ('selected', 'selected');
}

// Add sort option element to sort dropdown menu
$sort_select->appendChild ($option);
}

// Create empty option group as spacer
$spacer_optgroup = new HTMLTag ('optgroup', array (
'label' => '&nbsp;'
));

// Add spacer option group to sort dropdown menu
$sort_select->appendChild ($spacer_optgroup);

// Create option group for threaded sort options
$threaded_optgroup = new HTMLTag ('optgroup', array (
'label' => $this->locale->text['threads']
));

// Array of select tag threaded sort options
$threaded_sort_options = array (
'threaded-descending' => $this->locale->text['sort-descending'],
'threaded-by-date' => $this->locale->text['sort-by-date'],
'threaded-by-likes' => $this->locale->text['sort-by-likes'],
'by-popularity' => $this->locale->text['sort-by-popularity'],
'by-discussion' => $this->locale->text['sort-by-discussion'],
'threaded-by-name' => $this->locale->text['sort-by-name']
);

// Run through each threaded sort option
foreach ($threaded_sort_options as $value => $html) {
// Create option for sort dropdown menu element
$option = new HTMLTag ('option', array (
'value' => $value,
'innerHTML' => $html
), false);

// Set option as selected if its the configured default
if ($value === $this->setup->defaultSorting) {
$option->createAttribute ('selected', 'selected');
}

// Add sort option element to threaded option group
$threaded_optgroup->appendChild ($option);
}

// Add threaded sort options group to sort dropdown menu
$sort_select->appendChild ($threaded_optgroup);

// Add sort dropdown menu element to sort wrapper element
$sort_wrapper->appendChild ($sort_select);

// Add comment count element to wrapper element
$count_sort_wrapper->appendChild ($sort_wrapper);
}
}

// Add comment count and sort dropdown menu wrapper to comments section
$comments_section->appendChild ($count_sort_wrapper);

// Create element that will hold the comments
$sort_div = new HTMLTag ('div', array (
'id' => $this->prefix ('sort-section', false),
'class' => 'hashover-sort-section'
), false);

// Add comments to HashOver element
if (!empty ($this->comments)) {
$sort_div->innerHTML (trim ($this->comments));
}

// Add comments element to comments section
$comments_section->appendChild ($sort_div);

// Add comments element to HashOver element
$hashover_element->appendChild ($comments_section);

// Check if form position setting set to 'bottom'
if ($this->setup->formPosition === 'bottom') {
// Add primary form wrapper to HashOver element
$hashover_element->appendChild ($form_section);
}

// Create end links wrapper element
$end_links_wrapper = new HTMLTag ('div', array (
'id' => $this->prefix ('end-links', false),
'class' => 'hashover-end-links'
));

// Hide end links wrapper if comments are to be initially hidden
if ($this->mode !== 'php' and $this->setup->collapsesInterface === true) {
$end_links_wrapper->createAttribute ('style', 'display: none;');
}

// HashOver Comments hyperlink text
$homepage_link_text = $this->locale->text['hashover-comments'];

// Create link back to HashOver homepage
$homepage_link = new HTMLTag ('a', array (
'rel' => 'nofollow',
'href' => 'https://www.barkdull.org/software/hashover',
'class' => 'hashover-home-link',
'target' => '_blank',
'title' => $homepage_link_text,
'innerHTML' => $homepage_link_text
), false);

// Add link back to HashOver homepage to end links wrapper element
$end_links_wrapper->innerHTML ($homepage_link->asHTML () . ' &#8210;');

// End links array
$end_links = array ();

// Check if there is at least one comment
if ($this->commentCounts['total'] > 1) {
// If so, check if we are to append an RSS feed link
if ($this->setup->appendsRss === true) {
// If so, encode page URL
$page_url = $this->safeURLEncode ($this->setup->pageURL);

// Create RSS feed link
$rss_link = new HTMLTag ('a', array (), false);
$rss_link->createAttribute ('href', $this->setup->getHttpPath ('api/rss.php'));
$rss_link->appendAttribute ('href', '?url=' . $page_url, false);

// "RSS Feed" locale string
$rss_link_text = $this->locale->text['rss-feed'];

// Create RSS feed attributes
$rss_link->createAttributes (array (
'class' => 'hashover-rss-link',
'rel' => 'nofollow',
'target' => '_blank',
'title' => $rss_link_text,
'innerHTML' => $rss_link_text
));

// Add RSS hyperlink to end links array
$end_links[] = $rss_link->asHTML ();
}
}

// Source Code hyperlink text
$source_link_text = $this->locale->text['source-code'];

// Create link to HashOver source code
$source_link = new HTMLTag ('a', array (
'rel' => 'nofollow',
'href' => $this->setup->getBackendPath ('source-viewer.php'),
'class' => 'hashover-source-link',
'target' => '_blank',
'title' => $source_link_text,
'innerHTML' => $source_link_text
), false);

// Add source code hyperlink to end links array
$end_links[] = $source_link->asHTML ();

if ($this->mode !== 'php') {
// Create link to HashOver JavaScript source code
$javascript_link = new HTMLTag ('a', array (
'rel' => 'nofollow',
'href' => $this->setup->getHttpPath ('comments.php'),
'class' => 'hashover-javascript-link',
'target' => '_blank',
'title' => 'JavaScript'
), false);

// Add JavaScript code hyperlink text
$javascript_link->innerHTML ('JavaScript');

// Add JavaScript hyperlink to end links array
$end_links[] = $javascript_link->asHTML ();
}

// Add end links to end links wrapper element
$end_links_wrapper->appendInnerHTML (implode (' &middot;' . PHP_EOL, $end_links));

// Add end links wrapper element to HashOver element
$hashover_element->appendChild ($end_links_wrapper);

// Return all HTML with the HashOver wrapper element
if ($hashover_wrapper === true) {
return $hashover_element->asHTML ();
}

// Return just the HashOver wrapper element's innerHTML
return $hashover_element->innerHTML;
}
}