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<?php

/**
 *
 * Provides functionality to select different templates for the standard theme pages <i>album.php</i>, <i>image.php</i>
 * and for Zenpage <i>pages.php</i> and <i>news.php</i>.
 *
 * The additional template files have to be clones of the standard theme pages which must be kept as default ones.
 * The file names of these additional template files must match these patterns and should not include special characters or characters with diacritical marks:
 *
 * Zenphoto gallery items:
 * <ul>
 * <li>For albums: album<var>customname</var>.php</li>
 * <li>For images : image<var>customname</var>.php</li>
 * </ul>
 *
 * "Select album layout" checkbox:
 * If you want to avoid to manually select a specific layout for all images in an album you can check this option
 * on the album's edit page. Then a layout is assigned to the images automatically as well.
 *
 * Example:
 * You select an album layout page named "album_test.php" for an album. If you select that option mentioned above an image layout named "image_test.php"
 * will be used for the direct images of this album if it exists. Otherwise the standard image.php is used or if set an individual image layout page.
 * Selecting this option will not clear already individually set image layouts!
 *
 * Zenpage CMS items:
 * <hr>
 * For Zenpage pages: pages<i>customname</i>.php<br>
 * For Zenpage news articles and news categories: news<i>customname</i>.php.
 *
 * The main news page and the news archive can't be assigned to layout pages.
 *
 * Layout selection inheritance:
 * <hr>
 * The layout selection of a parent album (images see above), page or category is inherited by its sub items on all levels without their own db entry
 * if no specific layout is seleced. News articles don't inherit anything because they don't directly belong to any parent item.
 *
 * @author Malte Müller (acrylian), Stephen Billard (sbillard)
 * @package plugins
 * @subpackage multiple-layouts
 */
$plugin_is_filter = 5 | FEATURE_PLUGIN;
$plugin_description = gettext("Multiple <em>Theme</em> layouts");
$plugin_author = "Malte Müller (acrylian), Stephen Billard (sbillard)";
$plugin_category = gettext('Misc');

$option_interface = 'multipleLayoutOptions';

zp_register_filter('load_theme_script', 'getLayout');
zp_register_filter('remove_object', 'deleteLayoutSelection');
zp_register_filter('copy_object', 'copyLayoutSelection');
if (getOption('multiple_layouts_albums')) {
    zp_register_filter('edit_album_utilities', 'layoutSelector_album');
    zp_register_filter('save_album_utilities_data', 'saveZenphotoLayoutSelection');
}
if (getOption('multiple_layouts_images')) {
    zp_register_filter('edit_image_utilities', 'layoutSelector');
    zp_register_filter('save_image_utilities_data', 'saveZenphotoLayoutSelection');
}
if (extensionEnabled('zenpage')) {
    if (getOption('multiple_layouts_pages')) {
        zp_register_filter('publish_page_utilities', 'layoutSelector');
        zp_register_filter('new_page', 'saveLayoutSelection');
        zp_register_filter('update_page', 'saveLayoutSelection');
    }
    if (getOption('multiple_layouts_news')) {
        zp_register_filter('publish_article_utilities', 'layoutSelector');
        zp_register_filter('new_article', 'saveLayoutSelection');
        zp_register_filter('update_article', 'saveLayoutSelection');
    }
    if (getOption('multiple_layouts_news_categories')) {
        zp_register_filter('publish_category_utilities', 'layoutSelector');
        zp_register_filter('new_category', 'saveLayoutSelection');
        zp_register_filter('update_category', 'saveLayoutSelection');
    }
}

/**
 * Plugin option handling class
 *
 */
class multipleLayoutOptions {

    function __construct() {
        setOptionDefault('multiple_layouts_images', 0);
        setOptionDefault('multiple_layouts_albums', 0);
        setOptionDefault('multiple_layouts_pages', 1);
        setOptionDefault('multiple_layouts_news', 1);
        setOptionDefault('multiple_layouts_news_categories', 1);
    }

    function getOptionsSupported() {
        $checkboxes = array(gettext('Albums') => 'multiple_layouts_albums', gettext('Images') => 'multiple_layouts_images');
        if (extensionEnabled('zenpage')) {
            $checkboxes = array_merge($checkboxes, array(gettext('Pages') => 'multiple_layouts_pages', gettext('News') => 'multiple_layouts_news', gettext('News categories') => 'multiple_layouts_news_categories'));
        }
        $options = array(gettext('Enable multiple layouts for') => array('key'               => 'multiple_layouts_allowed', 'type'           => OPTION_TYPE_CHECKBOX_ARRAY,
                                        'checkboxes' => $checkboxes,
                                        'desc'           => '')
        );
        return $options;
    }

    function handleOption($option, $currentValue) {

    }

}

/**
 * Gets the selected layout page for this item. Returns false if nothing is selected.
 *
 * @param object $obj the object being selected
 * @param string $type For Zenphoto gallery items "multiple_layouts_albums", "multiple_layouts_images"
 *                                       For Zenpage CMS items , "multiple_layouts_pages", , "multiple_layouts_news" , "multiple_layouts_news_categories"
 * @return result
 */
function getSelectedLayout($obj, $type) {
    if ($obj && $obj->exists) {
        $assignedlayout = query_single_row("SELECT * FROM " . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND `type` = "' . $type . '"');
        if (!$assignedlayout || empty($assignedlayout['data'])) {
            $assignedlayout = checkParentLayouts($obj, $type);
        }
        return $assignedlayout;
    }
    return false;
}

/**
 * Checks if there is a layout inherited from a parent items (album, page or category) and returns it. Returns false otherwise.
 *
 * @param object $obj the object being selected
 * @param string $type For Zenphoto gallery items "multiple_layouts_albums"
 *                                       For Zenpage CMS items , "multiple_layouts_pages", , "multiple_layouts_news" , "multiple_layouts_news_categories"
 * @return result
 */
function checkParentLayouts($obj, $type) {
    $parents = array();
    switch ($type) {
        case 'multiple_layouts_images':
            $type = 'multiple_layouts_albums_images';
            $obj = $obj->getAlbum();
            array_unshift($parents, $obj);
        case 'multiple_layouts_albums':
        case 'multiple_layouts_albums_images':
            while (!is_null($obj = $obj->getParent())) {
                array_unshift($parents, $obj);
            }
            if (count($parents) > 0) {
                $parents = array_reverse($parents); //reverse so we can check the direct parent first.
                foreach ($parents as $parentobj) {
                    $parentlayouts = query_single_row('SELECT * FROM ' . prefix('plugin_storage') . ' WHERE `aux`=' . $parentobj->getID() . ' AND `type` = "' . $type . '"');
                    if ($parentlayouts && $parentlayouts['data']) {
                        return $parentlayouts;
                    }
                }
            }
            break;
        case 'multiple_layouts_pages':
        case 'multiple_layouts_news_categories':
            $parents = $obj->getParents();
            if (count($parents) > 0) {
                $parents = array_reverse($parents); //reverse so we can check the direct parent first.
                foreach ($parents as $parent) {
                    if ($type === 'multiple_layouts_pages') {
                        $parentobj = new ZenpagePage($parent);
                    } else {
                        $parentobj = new ZenpageCategory($parent);
                    }
                    $parentlayouts = query_single_row('SELECT * FROM ' . prefix('plugin_storage') . ' WHERE `aux`=' . $parentobj->getID() . ' AND `type` = "' . $type . '"');
                    if ($parentlayouts && $parentlayouts['data']) {
                        return $parentlayouts;
                    }
                }
            }
            break;
    }
    return false;
}

/**
 * Gets the selected layout page for images if the album option to use the equivalent of their album layout is seleted.
 *
 * @param object $obj the album
 * @return results
 */
function checkLayoutUseForImages($obj) {
    $albumimagelayout = query_single_row("SELECT id, `data` FROM " . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND `type` = "multiple_layouts_albums_images"');
    if ($albumimagelayout) {
        return $albumimagelayout;
    } else {
        $parents = array();
        while (!is_null($obj = $obj->getParent())) {
            array_unshift($parents, $obj);
        }
        if (count($parents) > 0) {
            $parents = array_reverse($parents);
            foreach ($parents as $parent) {
                $parentimagelayouts = query_full_array('SELECT id, `data` FROM ' . prefix('plugin_storage') . ' WHERE `aux`=' . $parent->getID() . ' AND `type` = "multiple_layouts_albums_images"');
                if ($parentimagelayouts && $parentimagelayouts['data']) {
                    return $parentimagelayouts;
                }
            }
        }
    }
    return false;
}

/**
 * returns the layout selector for an object.
 *
 * @param $string $html
 * @param object $obj
 */
function layoutSelector($html, $obj, $prefix = '') {
    $type = 'multiple_layouts_' . $obj->table;
    if (getOption($type)) {
        $html .= getLayoutSelector($obj, $type, '<hr /><p>' . gettext('Select layout:') . '</p>', $prefix);
    }
    return $html;
}

/**
 * returns the layout selectors for an album.
 *
 * @param $string $html
 * @param object $obj
 */
function layoutSelector_album($html, $obj, $prefix) {
    if (getOption('multiple_layouts_albums')) {
        $albumhtml = getLayoutSelector($obj, 'multiple_layouts_albums', '<hr /><p>' . gettext('Select album layout:') . '</p>', $prefix);
        $imagehtml = getLayoutSelector($obj, 'multiple_layouts_albums_images', '<p>' . gettext('Select default album image layout:') . '</p>', $prefix, true);
        if (!$obj->isDynamic() && strpos($imagehtml, '<p class="no_extra">') === false) {
            $imagehtml .= '<br /><input type="checkbox" id="layout_selector_resetimagelayouts" name="layout_selector_resetimagelayouts" /><label for="layout_selector_resetimagelayouts">' . gettext('Reset individual image layouts') . '</label>';
        }
        return $html . $albumhtml . $imagehtml;
    }
    return $html;
}

/**
 * Worker function for creating layout selectors. Returns the HTML
 *
 * @param object $obj
 * @param string $type
 * @param string $text
 * @param string$secondary
 */
function getLayoutSelector($obj, $type, $text, $prefix = '', $secondary = false) {
    global $_zp_gallery;
    $selectdefault = '';
    $selected = '';
    $files = array();
    $list = array();
    $getlayout = '';
    $table = $obj->table;
    $path = SERVERPATH . '/' . THEMEFOLDER . '/' . $_zp_gallery->getCurrentTheme() . '/';
    $defaultlayout = '';
    $defaulttext = gettext('default');
    switch ($table) {
        case 'albums':
            if ($secondary) { //    the selector for the image default of the album
                $filesmask = 'image';
            } else {
                $filesmask = 'album';
            };
            $child = $obj->getParentID();
            $defaulttext = gettext('inherited');
            break;
        case 'images':
            $filesmask = 'image';
            $album = $obj->album;
            $child = $album->getID();
            $defaulttext = gettext('album default');
            break;
        case 'pages':
            $filesmask = 'pages';
            $child = $obj->getParentID();
            $defaulttext = gettext('inherited');
            break;
        case 'news':
            $child = false;
            $categories = $obj->getCategories();
            if ($categories) {
                foreach ($categories as $cat) {
                    $cat = new ZenpageCategory($cat['titlelink']);
                    $getlayout = getSelectedLayout($cat, 'multiple_layouts_news_categories');
                    if ($getlayout && $getlayout['data']) { //  in at least one news category with an alternate page
                        $defaulttext = gettext('inherited');
                        $defaultlayout = gettext('from category');
                        break;
                    }
                }
            }
            $filesmask = 'news';
            break;
        case 'news_categories':
            $child = $obj->getParentID();
            $defaulttext = gettext('inherited');
            $filesmask = 'news';
            break;
    }
    $curdir = getcwd();
    chdir($path);
    $files = safe_glob($filesmask . '*.php');
    chdir($curdir);

    if ($child) {
        $defaultlayout = checkParentLayouts($obj, $type);
        if($defaultlayout) {
            $defaultlayout = $defaultlayout['data'];
        }
    }
    if ($defaultlayout) {
        $defaultlayout = stripSuffix($defaultlayout);
    } else {
        $defaultlayout = $filesmask;
    }

    if ($obj->transient) {
        $getlayout = false;
    } else {
        $getlayout = query_single_row("SELECT * FROM " . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND `type` = "' . $type . '"');
    }
    if (!$child && ($key = array_search($filesmask . '.php', $files)) !== false) {
        unset($files[$key]);
    }
    foreach ($files as $file) {
        $file = filesystemToInternal($file);
        $list[stripSuffix($file)] = $file;
    }
    ksort($list);

    $html = $text;
    if (count($files) != 0) {
        $html .= '<select id="' . $type . $prefix . '" name="' . $prefix . $type . '">' . "\n";
        if (is_array($getlayout)) {
            $selectedlayout = $getlayout['data'];
        } else {
            $selectedlayout = '';
        }
        $html .= '<option value=""' . ($selectedlayout == '' ? ' selected="selected"' : '') . ' style="background-color:LightGray" >*' . $defaulttext . '* (' . $defaultlayout . ')</option>' . "\n";
        foreach ($list as $display => $file) {
            $html .= '<option value="' . html_encode($file) . '"' . ($selectedlayout == $file ? ' selected="selected"' : '') . '>' . $display . '</option>' . "\n";
        }
        $html .= '</select>' . "\n";
    } else {
        $html = '<p class="no_extra">' . sprintf(gettext('No extra <em>%s</em> theme pages available'), $filesmask) . '</p>' . "\n";
    }
    return $html;
}

/**
 * Gets the select layout page and returns it to the load_theme_script filter
 *
 * @param string $path Path of the layout file
 * @return string
 * @return string
 */
function getLayout($path) {
    global $_zp_gallery, $_zp_gallery_page, $_zp_current_image, $_zp_current_album, $_zp_current_zenpage_page, $_zp_current_zenpage_news, $_zp_current_category, $_zp_current_search;
    if ($path) {
        $themepath = THEMEFOLDER . '/' . $_zp_gallery->getCurrentTheme() . '/';
        $getlayout = false;
        switch ($_zp_gallery_page) {
            case 'album.php':
                if (getOption('multiple_layouts_albums')) {
                    $getlayout = getSelectedLayout($_zp_current_album, 'multiple_layouts_albums');
                }
                break;
            case 'image.php':
                if (getOption('multiple_layouts_images')) {
                    $currentalbumname = $_zp_current_album->name;
                    if (in_context(ZP_SEARCH_LINKED) && !in_context(ZP_ALBUM_LINKED)) {
                        if (!$album = $_zp_current_search->getDynamicAlbum()) {
                            $album = $_zp_current_album;
                        }
                    } else {
                        $getlayout = getSelectedLayout($_zp_current_image, 'multiple_layouts_images');
                        $album = $_zp_current_album;
                    }
                    if ($album && !$getlayout) {
                        $getlayout = checkLayoutUseForImages($album);
                    }
                }
                break;
            case 'pages.php':
                if (getOption('multiple_layouts_pages')) {
                    $getlayout = getSelectedLayout($_zp_current_zenpage_page, 'multiple_layouts_pages');
                }
                break;
            case 'news.php':
                if (getOption('multiple_layouts_news_categories') && in_context(ZP_ZENPAGE_NEWS_CATEGORY)) {
                    $getlayout = getSelectedLayout($_zp_current_category, 'multiple_layouts_news_categories');
                } elseif (getOption('multiple_layouts_news') && in_context(ZP_ZENPAGE_SINGLE)) {
                    $getlayout = getSelectedLayout($_zp_current_zenpage_news, 'multiple_layouts_news');
                }
                break;
        }
        if ($getlayout && $getlayout['data'] && file_exists(internalToFilesystem(SERVERPATH . '/' . $themepath . $getlayout['data']))) {
            return $themepath . $getlayout['data'];
        }
    }
    return $path;
}

/**
 * Saves the layout page assignment via filter on the backend
 *
 * @param string $message Message (not used)
 * @param object $obj Object of the item to assign the layout
 * @param string $oldtitlelink Name of the item before an update (only on updates)
 * @return string
 */
function saveLayoutSelection($message, $obj) {
    $selectedlayout = '';
    $type = 'multiple_layouts_' . $obj->table;
    if (isset($_POST[$type])) {
        $selectedlayout = sanitize($_POST[$type]);
        $table = $obj->table;
        $exists = query_single_row("SELECT * FROM " . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND `type` = "' . $type . '"');
        if ($selectedlayout) { // not default
            if ($exists) {
                $query = query('UPDATE ' . prefix('plugin_storage') . ' SET `aux`=' . $obj->getID() . ', `data`=' . db_quote($selectedlayout) . ' WHERE `id`=' . $exists['id']);
            } else {
                $query = query('INSERT INTO ' . prefix('plugin_storage') . ' (type,aux,data) VALUES (' . db_quote($type) . ', ' . $obj->getID() . ', ' . db_quote($selectedlayout) . ')');
            }
        } else {
            if ($exists) { //   got to get rid of the record
                $query = query('DELETE FROM ' . prefix('plugin_storage') . ' WHERE `id`=' . $exists['id']);
            } else {
                $query = true; //   no harm, no foul
            }
        }
        if (!$query) {
            $message .= '<p class="errorbox">' . sprintf(gettext('Query failure: %s'), db_error()) . '</p>';
        }
    }
    return $message;
}

/**
 * Saves the layout page assignment via filter on the backend for images and albums
 *
 * @param object $obj Object of the item to assign the layout
 * @return string
 */
function saveZenphotoLayoutSelection($obj, $prefix) {
    $cssIDappend = '';
    $selectedlayout = '';
    $titlelink = '';
    $table = $obj->table;
    $type = 'multiple_layouts_' . $table;
    if (isset($_POST[$prefix . $type])) {
        $selectedlayout = sanitize($_POST[$prefix . $type]);
        $exists = query_single_row("SELECT * FROM " . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND `type` = "' . $type . '"');
        if ($selectedlayout) { // not default
            if ($exists) {
                $query = query('UPDATE ' . prefix('plugin_storage') . ' SET `aux`=' . $obj->getID() . ', `data`=' . db_quote($selectedlayout) . ' WHERE `id`=' . $exists['id']);
            } else {
                $query = query('INSERT INTO ' . prefix('plugin_storage') . ' (type,aux,data) VALUES ("' . $type . '", ' . $obj->getID() . ', ' . db_quote($selectedlayout) . ')');
            }
        } else {
            if ($exists) { //   got to get rid of the record
                $query = query('DELETE FROM ' . prefix('plugin_storage') . ' WHERE `id`=' . $exists['id']);
            } else {
                $query = true; //   no harm, no foul
            }
        }
        if ($table == 'albums') { //    deal with the default images selection, clear image selections
            if (isset($_POST['layout_selector_resetimagelayouts'])) {
                $result = query_full_array('SELECT `id` FROM ' . prefix('images') . ' WHERE `albumid`=' . $obj->getID());
                if ($result) {
                    $imagelist = '';
                    foreach ($result as $row) {
                        $imagelist .= '`aux`=' . $row['id'] . ' OR ';
                    }
                    $query = query($sql = 'DELETE FROM ' . prefix('plugin_storage') . ' WHERE `type`="multiple_layouts_images" AND (' . substr($imagelist, 0, -4) . ')', false);
                }
            }
            $exists = query_single_row("SELECT * FROM " . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND `type` = "multiple_layouts_albums_images"');
            $selectedlayout = isset($_POST[$prefix . 'multiple_layouts_albums_images']) ? sanitize($_POST[$prefix . 'multiple_layouts_albums_images']) : NULL;
            if ($selectedlayout) { // not default
                if ($exists) {
                    $query = query('UPDATE ' . prefix('plugin_storage') . ' SET `aux`=' . $obj->getID() . ', `data`=' . db_quote($selectedlayout) . ' WHERE `id`=' . $exists['id']);
                } else {
                    $query = query('INSERT INTO ' . prefix('plugin_storage') . ' (type,aux,data) VALUES ("multiple_layouts_albums_images", ' . $obj->getID() . ', ' . db_quote($selectedlayout) . ')');
                }
            } else {
                if ($exists) { //   got to get rid of the record
                    $query = query('DELETE FROM ' . prefix('plugin_storage') . ' WHERE `id`=' . $exists['id']);
                } else {
                    $query = true; //   no harm, no foul
                }
            }
        }
    }
    return $obj;
}

/**
 * processes object removals if they have been assigned layouts
 *
 * @param bool $allow we just return this since we have no need to abort the remove
 * @param object $obj the object being removed
 * @return bool
 */
function deleteLayoutSelection($allow, $obj) {
    $type = 'multiple_layouts_' . $obj->table;
    if (getOption($type)) {
        $query = query('DELETE FROM ' . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND type = "' . $type . '"', false);
        if (isAlbumClass($obj)) {
            $result = query_single_row('DELETE FROM ' . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND type = "multiple_layouts_albums_images"', false);
        }
    }
    return $allow;
}

/**
 *
 * Enter description here ...
 * @param $allow
 * @param $obj
 */
function copyLayoutSelection($newid, $obj) {
    $type = 'multiple_layouts_' . $obj->table;
    if (getOption($type)) {
        $result = query_single_row('SELECT * FROM ' . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND type = "' . $type . '"', false);
        if ($result) {
            $query = query('INSERT INTO ' . prefix('plugin_storage') . ' (type,aux,data) VALUES ("' . $result['type'] . '", ' . $newid . ', ' . db_quote($result['data']) . ')');
        }
        if (isAlbumClass($obj)) {
            $result = query_single_row('SELECT * FROM ' . prefix('plugin_storage') . ' WHERE `aux` = ' . $obj->getID() . ' AND type = "multiple_layouts_albums_images"', false);
            if ($result) {
                $query = query('INSERT INTO ' . prefix('plugin_storage') . ' (type,aux,data) VALUES ("multiple_layouts_albums_images", ' . $newid . ', ' . db_quote($result['data']) . ')');
            }
        }
    }
    return $newid;
}

?>