<?php
/*
	Question2Answer by Gideon Greenspan and contributors
	http://www.question2answer.org/

	File: qa-include/qa-page-ask.php
	Description: Controller for ask a question page


	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;
	}


	require_once QA_INCLUDE_DIR.'app/format.php';
	require_once QA_INCLUDE_DIR.'app/limits.php';
	require_once QA_INCLUDE_DIR.'db/selects.php';
	require_once QA_INCLUDE_DIR.'util/sort.php';


//	Check whether this is a follow-on question and get some info we need from the database

	$in=array();

	$followpostid=qa_get('follow');
	$in['categoryid']=qa_clicked('doask') ? qa_get_category_field_value('category') : qa_get('cat');
	$userid=qa_get_logged_in_userid();

	list($categories, $followanswer, $completetags)=qa_db_select_with_pending(
		qa_db_category_nav_selectspec($in['categoryid'], true),
		isset($followpostid) ? qa_db_full_post_selectspec($userid, $followpostid) : null,
		qa_db_popular_tags_selectspec(0, QA_DB_RETRIEVE_COMPLETE_TAGS)
	);

	if (!isset($categories[$in['categoryid']]))
		$in['categoryid']=null;

	if (@$followanswer['basetype']!='A')
		$followanswer=null;


//	Check for permission error

	$permiterror=qa_user_maximum_permit_error('permit_post_q', QA_LIMIT_QUESTIONS);

	if ($permiterror) {
		$qa_content=qa_content_prepare();

		// The 'approve', 'login', 'confirm', 'limit', 'userblock', 'ipblock' permission errors are reported to the user here
		// The other option ('level') prevents the menu option being shown, in qa_content_prepare(...)

		switch ($permiterror) {
			case 'login':
				$qa_content['error']=qa_insert_login_links(qa_lang_html('question/ask_must_login'), qa_request(), isset($followpostid) ? array('follow' => $followpostid) : null);
				break;

			case 'confirm':
				$qa_content['error']=qa_insert_login_links(qa_lang_html('question/ask_must_confirm'), qa_request(), isset($followpostid) ? array('follow' => $followpostid) : null);
				break;

			case 'limit':
				$qa_content['error']=qa_lang_html('question/ask_limit');
				break;

			case 'approve':
				$qa_content['error']=qa_lang_html('question/ask_must_be_approved');
				break;

			default:
				$qa_content['error']=qa_lang_html('users/no_permission');
				break;
		}

		return $qa_content;
	}


//	Process input

	$captchareason=qa_user_captcha_reason();

	$in['title']=qa_post_text('title'); // allow title and tags to be posted by an external form
	$in['extra']=qa_opt('extra_field_active') ? qa_post_text('extra') : null;
	if (qa_using_tags())
		$in['tags']=qa_get_tags_field_value('tags');

	if (qa_clicked('doask')) {
		require_once QA_INCLUDE_DIR.'app/post-create.php';
		require_once QA_INCLUDE_DIR.'util/string.php';

		$categoryids=array_keys(qa_category_path($categories, @$in['categoryid']));
		$userlevel=qa_user_level_for_categories($categoryids);

		$in['name']=qa_post_text('name');
		$in['notify'] = strlen(qa_post_text('notify')) > 0;
		$in['email']=qa_post_text('email');
		$in['queued'] = qa_user_moderation_reason($userlevel) !== false;

		qa_get_post_content('editor', 'content', $in['editor'], $in['content'], $in['format'], $in['text']);

		$errors=array();

		if (!qa_check_form_security_code('ask', qa_post_text('code')))
			$errors['page']=qa_lang_html('misc/form_security_again');

		else {
			$filtermodules=qa_load_modules_with('filter', 'filter_question');
			foreach ($filtermodules as $filtermodule) {
				$oldin=$in;
				$filtermodule->filter_question($in, $errors, null);
				qa_update_post_text($in, $oldin);
			}

			if (qa_using_categories() && count($categories) && (!qa_opt('allow_no_category')) && !isset($in['categoryid']))
				$errors['categoryid']=qa_lang_html('question/category_required'); // check this here because we need to know count($categories)
			elseif (qa_user_permit_error('permit_post_q', null, $userlevel))
				$errors['categoryid']=qa_lang_html('question/category_ask_not_allowed');

			if ($captchareason) {
				require_once QA_INCLUDE_DIR.'app/captcha.php';
				qa_captcha_validate_post($errors);
			}

			if (empty($errors)) {
				$cookieid=isset($userid) ? qa_cookie_get() : qa_cookie_get_create(); // create a new cookie if necessary

				$questionid=qa_question_create($followanswer, $userid, qa_get_logged_in_handle(), $cookieid,
					$in['title'], $in['content'], $in['format'], $in['text'], isset($in['tags']) ? qa_tags_to_tagstring($in['tags']) : '',
					$in['notify'], $in['email'], $in['categoryid'], $in['extra'], $in['queued'], $in['name']);

				qa_redirect(qa_q_request($questionid, $in['title'])); // our work is done here
			}
		}
	}


//	Prepare content for theme

	$qa_content=qa_content_prepare(false, array_keys(qa_category_path($categories, @$in['categoryid'])));

	$qa_content['title']=qa_lang_html(isset($followanswer) ? 'question/ask_follow_title' : 'question/ask_title');
	$qa_content['error']=@$errors['page'];

	$editorname=isset($in['editor']) ? $in['editor'] : qa_opt('editor_for_qs');
	$editor=qa_load_editor(@$in['content'], @$in['format'], $editorname);

	$field=qa_editor_load_field($editor, $qa_content, @$in['content'], @$in['format'], 'content', 12, false);
	$field['label']=qa_lang_html('question/q_content_label');
	$field['error']=qa_html(@$errors['content']);

	$custom=qa_opt('show_custom_ask') ? trim(qa_opt('custom_ask')) : '';

	$qa_content['form']=array(
		'tags' => 'name="ask" method="post" action="'.qa_self_html().'"',

		'style' => 'tall',

		'fields' => array(
			'custom' => array(
				'type' => 'custom',
				'note' => $custom,
			),

			'title' => array(
				'label' => qa_lang_html('question/q_title_label'),
				'tags' => 'name="title" id="title" autocomplete="off"',
				'value' => qa_html(@$in['title']),
				'error' => qa_html(@$errors['title']),
			),

			'similar' => array(
				'type' => 'custom',
				'html' => '<span id="similar"></span>',
			),

			'content' => $field,
		),

		'buttons' => array(
			'ask' => array(
				'tags' => 'onclick="qa_show_waiting_after(this, false); '.
					(method_exists($editor, 'update_script') ? $editor->update_script('content') : '').'"',
				'label' => qa_lang_html('question/ask_button'),
			),
		),

		'hidden' => array(
			'editor' => qa_html($editorname),
			'code' => qa_get_form_security_code('ask'),
			'doask' => '1',
		),
	);

	if (!strlen($custom))
		unset($qa_content['form']['fields']['custom']);

	if (qa_opt('do_ask_check_qs') || qa_opt('do_example_tags')) {
		$qa_content['script_rel'][]='qa-content/qa-ask.js?'.QA_VERSION;
		$qa_content['form']['fields']['title']['tags'].=' onchange="qa_title_change(this.value);"';

		if (strlen(@$in['title']))
			$qa_content['script_onloads'][]='qa_title_change('.qa_js($in['title']).');';
	}

	if (isset($followanswer)) {
		$viewer=qa_load_viewer($followanswer['content'], $followanswer['format']);

		$field=array(
			'type' => 'static',
			'label' => qa_lang_html('question/ask_follow_from_a'),
			'value' => $viewer->get_html($followanswer['content'], $followanswer['format'], array('blockwordspreg' => qa_get_block_words_preg())),
		);

		qa_array_insert($qa_content['form']['fields'], 'title', array('follows' => $field));
	}

	if (qa_using_categories() && count($categories)) {
		$field=array(
			'label' => qa_lang_html('question/q_category_label'),
			'error' => qa_html(@$errors['categoryid']),
		);

		qa_set_up_category_field($qa_content, $field, 'category', $categories, $in['categoryid'], true, qa_opt('allow_no_sub_category'));

		if (!qa_opt('allow_no_category')) // don't auto-select a category even though one is required
			$field['options']['']='';

		qa_array_insert($qa_content['form']['fields'], 'content', array('category' => $field));
	}

	if (qa_opt('extra_field_active')) {
		$field=array(
			'label' => qa_html(qa_opt('extra_field_prompt')),
			'tags' => 'name="extra"',
			'value' => qa_html(@$in['extra']),
			'error' => qa_html(@$errors['extra']),
		);

		qa_array_insert($qa_content['form']['fields'], null, array('extra' => $field));
	}

	if (qa_using_tags()) {
		$field=array(
			'error' => qa_html(@$errors['tags']),
		);

		qa_set_up_tag_field($qa_content, $field, 'tags', isset($in['tags']) ? $in['tags'] : array(), array(),
			qa_opt('do_complete_tags') ? array_keys($completetags) : array(), qa_opt('page_size_ask_tags'));

		qa_array_insert($qa_content['form']['fields'], null, array('tags' => $field));
	}

	if (!isset($userid))
		qa_set_up_name_field($qa_content, $qa_content['form']['fields'], @$in['name']);

	qa_set_up_notify_fields($qa_content, $qa_content['form']['fields'], 'Q', qa_get_logged_in_email(),
		isset($in['notify']) ? $in['notify'] : qa_opt('notify_users_default'), @$in['email'], @$errors['email']);

	if ($captchareason) {
		require_once QA_INCLUDE_DIR.'app/captcha.php';
		qa_set_up_captcha_field($qa_content, $qa_content['form']['fields'], @$errors, qa_captcha_reason_note($captchareason));
	}

	$qa_content['focusid']='title';


	return $qa_content;


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