<?php

/*
 * This file is part of PhpWiki.
 *
 * PhpWiki is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * PhpWiki is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with PhpWiki; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

/**
 * A plugin which returns a list of referenced pages which do not exist yet.
 *
 **/

class WikiPlugin_WantedPagesOld
    extends WikiPlugin
{
    function getDescription()
    {
        return _("List referenced page names which do not exist yet.");
    }

    function getDefaultArguments()
    {
        return array('noheader' => false,
            'exclude' => _("PgsrcTranslation"),
            'page' => '[pagename]',
            'sortby' => false,
            'limit' => 50,
            'paging' => 'auto');
    }

    // info arg allows multiple columns
    // info=mtime,hits,summary,version,author,locked,minor,markup or all
    // exclude arg allows multiple pagenames exclude=HomePage,RecentChanges

    function run($dbi, $argstr, &$request, $basepage)
    {
        extract($this->getArgs($argstr, $request));

        if ($exclude) {
            if (!is_array($exclude))
                $exclude = explode(',', $exclude);
        }

        if ($page == _("WantedPages"))
            $page = "";

        // The PageList class can't handle the 'count' column needed
        // for this table
        $this->pagelist = array();

        // There's probably a more memory-efficient way to do this (eg
        // a tailored SQL query via the backend, but this gets the job
        // done.
        if (!$page) {
            $include_empty = false;
            $allpages_iter = $dbi->getAllPages($include_empty, $sortby, $limit);
            while ($page_handle = $allpages_iter->next()) {
                $name = $page_handle->getName();
                if ($name == __("InterWikiMap")) continue;
                if (!in_array($name, $exclude))
                    $this->iterateLinks($page_handle, $dbi);
            }
        } elseif ($page && $pageisWikiPage = $dbi->isWikiPage($page)) {
            //only get WantedPages links for one page
            $page_handle = $dbi->getPage($page);
            $this->iterateLinks($page_handle, $dbi);
            if (!$request->getArg('count')) {
                $args['count'] = count($this->pagelist);
            } else {
                $args['count'] = $request->getArg('count');
            }
        }
        ksort($this->pagelist);
        arsort($this->pagelist);

        $this->_rows = HTML();
        $caption = false;
        $this->_messageIfEmpty = _("None");

        if ($page) {
            // link count always seems to be 1 for a single page so
            // omit count column
            foreach ($this->pagelist as $key => $val) {
                $row = HTML::li(WikiLink((string)$key, 'unknown'));
                $this->_rows->pushContent($row);
            }
            if (!$noheader) {
                if ($pageisWikiPage)
                    $pagelink = WikiLink($page);
                else
                    $pagelink = WikiLink($page, 'unknown');
                $c = count($this->pagelist);
                $caption = fmt("Wanted Pages for %s (%d total):",
                    $pagelink, $c);
            }
            return $this->generateList($caption);

        } else {
            $spacer = new RawXml("&nbsp;&nbsp;&nbsp;&nbsp;");
            // Clicking on the number in the links column does a
            // FullTextSearch for the citations of the WantedPage
            // link.
            foreach ($this->pagelist as $key => $val) {
                $key = (string)$key; // TODO: Not sure why, but this
                // string cast type-coersion
                // does seem necessary here.
                // Enclose any FullTextSearch keys containing a space
                // with quotes in oder to request a defnitive search.
                $searchkey = (strstr($key, ' ') === false) ? $key : "\"$key\"";
                $row = HTML::tr(HTML::td(array('align' => 'right'),
                    Button(array('s' => $searchkey),
                        $val, _("FullTextSearch")),
                    // Alternatively, get BackLinks
                    // instead.
                    //
                    //Button(array('action'
                    //             => _("BackLinks")),
                    //       $val, $searchkey),
                    HTML::td(HTML($spacer,
                        WikiLink($key,
                            'unknown')))
                ));
                $this->_rows->pushContent($row);
            }
            $c = count($this->pagelist);
            if (!$noheader)
                $caption = sprintf(_("Wanted Pages in this wiki (%d total):"),
                    $c);
            $this->_columns = array(_("Count"), _("Page Name"));
            if ($c > 0)
                return $this->generateTable($caption);
            else
                return HTML(HTML::p($caption), HTML::p($this->_messageIfEmpty));
        }
    }

    private function generateTable($caption)
    {

        if (count($this->pagelist) > 0) {
            $table = HTML::table(array('class' => 'pagelist'));
            if ($caption)
                $table->pushContent(HTML::caption(array('align' => 'top'),
                    $caption));

            $row = HTML::tr();
            $spacer = new RawXml("&nbsp;&nbsp;&nbsp;&nbsp;");
            foreach ($this->_columns as $col_heading) {
                $row->pushContent(HTML::td(HTML($spacer,
                    HTML::u($col_heading))));
                $table_summary[] = $col_heading;
            }
            // Table summary for non-visual browsers.
            $table->setAttr('summary', sprintf(_("Columns: %s."),
                implode(", ", $table_summary)));

            $table->pushContent(HTML::thead($row),
                HTML::tbody(false, $this->_rows));
        } else {
            $table = HTML();
            if ($caption)
                $table->pushContent(HTML::p($caption));
            $table->pushContent(HTML::p($this->_messageIfEmpty));
        }

        return $table;
    }

    private function generateList($caption)
    {
        $list = HTML();
        $c = count($this->pagelist);
        if ($caption)
            $list->pushContent(HTML::p($caption));

        if ($c > 0)
            $list->pushContent(HTML::ul($this->_rows));
        else
            $list->pushContent(HTML::p($this->_messageIfEmpty));

        return $list;
    }

    private function iterateLinks($page_handle, $dbi)
    {
        $links_iter = $page_handle->getLinks($reversed = false);
        while ($link_handle = $links_iter->next()) {
            if (!$dbi->isWikiPage($linkname = $link_handle->getName()))
                if (!in_array($linkname, array_keys($this->pagelist)))
                    $this->pagelist[$linkname] = 1;
                else
                    $this->pagelist[$linkname] += 1;
        }
    }
}

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