<?php

/*
	Question2Answer (c) Gideon Greenspan

	http://www.question2answer.org/

	
	File: qa-include/qa-app-q-list.php
	Version: See define()s at top of qa-include/qa-base.php
	Description: Controller for most question listing pages, plus custom pages and plugin pages


	This program 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.
	
	This program 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.

	More about this license: http://www.question2answer.org/license.php
*/

	if (!defined('QA_VERSION')) { // don't allow this page to be requested directly from browser
		header('Location: ../');
		exit;
	}

	
	function qa_q_list_page_content($questions, $pagesize, $start, $count, $sometitle, $nonetitle,
		$navcategories, $categoryid, $categoryqcount, $categorypathprefix, $feedpathprefix, $suggest,
		$pagelinkparams=null, $categoryparams=null, $categoryisfavorite=null)
/*
	Returns the $qa_content structure for a question list page showing $questions retrieved from the database.
	If $pagesize is not null, it sets the max number of questions to display.
	If $count is not null, pagination is determined by $start and $count.
	The page title is $sometitle unless there are no questions shown, in which case it's $nonetitle.
	$navcategories should contain the categories retrived from the database using qa_db_category_nav_selectspec(...) for
	$categoryid, which is the current category shown (set $categoryisfavorite to whether the user has favorited it).
	If $categorypathprefix is set, category navigation will be shown, with per-category question counts if
	$categoryqcount is true. The nav links will have the prefix $categorypathprefix and possible extra $categoryparams.
	If $feedpathprefix is set, the page has an RSS feed whose URL uses that prefix.
	If there are no links to other pages, $suggest is used to suggest what the user should do.
	The $pagelinkparams are passed through to qa_html_page_links(...) which creates links for page 2, 3, etc..
	
*/
	{
		if (qa_to_override(__FUNCTION__)) { $args=func_get_args(); return qa_call_override(__FUNCTION__, $args); }
		
		require_once QA_INCLUDE_DIR.'qa-app-format.php';
		require_once QA_INCLUDE_DIR.'qa-app-updates.php';
	
		$userid=qa_get_logged_in_userid();
		
		
	//	Chop down to size, get user information for display

		if (isset($pagesize))
			$questions=array_slice($questions, 0, $pagesize);
	
		$usershtml=qa_userids_handles_html(qa_any_get_userids_handles($questions));


	//	Prepare content for theme
		
		$qa_content=qa_content_prepare(true, array_keys(qa_category_path($navcategories, $categoryid)));
	
		$qa_content['q_list']['form']=array(
			'tags' => 'METHOD="POST" ACTION="'.qa_self_html().'"',
		);
		
		$qa_content['q_list']['qs']=array();
		
		if (count($questions)) {
			$qa_content['title']=$sometitle;
		
			$options=qa_post_html_defaults('Q');
			if (isset($categorypathprefix))
				$options['categorypathprefix']=$categorypathprefix;
				
			foreach ($questions as $question)
				$qa_content['q_list']['qs'][]=qa_any_to_q_html_fields($question, $userid, qa_cookie_get(), $usershtml, null, $options);

		} else
			$qa_content['title']=$nonetitle;
			
		if (isset($userid) && isset($categoryid) && isset($categoryisfavorite))
			$qa_content['favorite']=qa_favorite_form(QA_ENTITY_CATEGORY, $categoryid, $categoryisfavorite,
				qa_lang_sub($categoryisfavorite ? 'main/remove_x_favorites' : 'main/add_category_x_favorites', $navcategories[$categoryid]['title']));
			
		if (isset($count) && isset($pagesize))
			$qa_content['page_links']=qa_html_page_links(qa_request(), $start, $pagesize, $count, qa_opt('pages_prev_next'), $pagelinkparams);
		
		if (empty($qa_content['page_links']))
			$qa_content['suggest_next']=$suggest;
			
		if (qa_using_categories() && count($navcategories) && isset($categorypathprefix))
			$qa_content['navigation']['cat']=qa_category_navigation($navcategories, $categoryid, $categorypathprefix, $categoryqcount, $categoryparams);
		
		if (isset($feedpathprefix) && (qa_opt('feed_per_category') || !isset($categoryid)) )
			$qa_content['feed']=array(
				'url' => qa_path_html(qa_feed_request($feedpathprefix.(isset($categoryid) ? ('/'.qa_category_path_request($navcategories, $categoryid)) : ''))),
				'label' => strip_tags($sometitle),
			);
			
		return $qa_content;
	}
	
	
	function qa_qs_sub_navigation($sort, $categoryslugs)
/*
	Return the sub navigation structure common to question listing pages
*/
	{
		$request='questions';

		if (isset($categoryslugs))
			foreach ($categoryslugs as $slug)
				$request.='/'.$slug;

		$navigation=array(
			'recent' => array(
				'label' => qa_lang('main/nav_most_recent'),
				'url' => qa_path_html($request),
			),
			
			'hot' => array(
				'label' => qa_lang('main/nav_hot'),
				'url' => qa_path_html($request, array('sort' => 'hot')),
			),
			
			'votes' => array(
				'label' => qa_lang('main/nav_most_votes'),
				'url' => qa_path_html($request, array('sort' => 'votes')),
			),

			'answers' => array(
				'label' => qa_lang('main/nav_most_answers'),
				'url' => qa_path_html($request, array('sort' => 'answers')),
			),

			'views' => array(
				'label' => qa_lang('main/nav_most_views'),
				'url' => qa_path_html($request, array('sort' => 'views')),
			),
		);
		
		if (isset($navigation[$sort]))
			$navigation[$sort]['selected']=true;
		else
			$navigation['recent']['selected']=true;
		
		if (!qa_opt('do_count_q_views'))
			unset($navigation['views']);
		
		return $navigation;
	}
	
	
	function qa_unanswered_sub_navigation($by, $categoryslugs)
/*
	Return the sub navigation structure common to unanswered pages
*/
	{
		$request='unanswered';

		if (isset($categoryslugs))
			foreach ($categoryslugs as $slug)
				$request.='/'.$slug;
		
		$navigation=array(
			'by-answers' => array(
				'label' => qa_lang('main/nav_no_answer'),
				'url' => qa_path_html($request),
			),
			
			'by-selected' => array(
				'label' => qa_lang('main/nav_no_selected_answer'),
				'url' => qa_path_html($request, array('by' => 'selected')),
			),
			
			'by-upvotes' => array(
				'label' => qa_lang('main/nav_no_upvoted_answer'),
				'url' => qa_path_html($request, array('by' => 'upvotes')),
			),
		);
		
		if (isset($navigation['by-'.$by]))
			$navigation['by-'.$by]['selected']=true;
		else
			$navigation['by-answers']['selected']=true;
			
		if (!qa_opt('voting_on_as'))
			unset($navigation['by-upvotes']);

		return $navigation;
	}


/*
	Omit PHP closing tag to help avoid accidental output
*/