<?php

use Friendica\App;
use Friendica\Core\System;

require_once('include/acl_selectors.php');
require_once('include/message.php');
require_once('include/Smilies.php');

function message_init(App $a) {

	$tabs = '';

	if ($a->argc >1 && is_numeric($a->argv[1])) {
		$tabs = render_messages(get_messages(local_user(),0,5), 'mail_list.tpl');
	}

	$new = array(
		'label' => t('New Message'),
		'url' => 'message/new',
		'sel'=> ($a->argv[1] == 'new'),
		'accesskey' => 'm',
	);

	$tpl = get_markup_template('message_side.tpl');
	$a->page['aside'] = replace_macros($tpl, array(
		'$tabs'=>$tabs,
		'$new'=>$new,
	));
	$base = System::baseUrl();

	$head_tpl = get_markup_template('message-head.tpl');
	$a->page['htmlhead'] .= replace_macros($head_tpl,array(
		'$baseurl' => System::baseUrl(true),
		'$base' => $base
	));

	$end_tpl = get_markup_template('message-end.tpl');
	$a->page['end'] .= replace_macros($end_tpl,array(
		'$baseurl' => System::baseUrl(true),
		'$base' => $base
	));

}

function message_post(App $a) {

	if (! local_user()) {
		notice( t('Permission denied.') . EOL);
		return;
	}

	$replyto   = ((x($_REQUEST,'replyto'))   ? notags(trim($_REQUEST['replyto']))   : '');
	$subject   = ((x($_REQUEST,'subject'))   ? notags(trim($_REQUEST['subject']))   : '');
	$body      = ((x($_REQUEST,'body'))      ? escape_tags(trim($_REQUEST['body'])) : '');
	$recipient = ((x($_REQUEST,'messageto')) ? intval($_REQUEST['messageto'])       : 0 );

	$ret = send_message($recipient, $body, $subject, $replyto);
	$norecip = false;

	switch($ret){
		case -1:
			notice( t('No recipient selected.') . EOL );
			$norecip = true;
			break;
		case -2:
			notice( t('Unable to locate contact information.') . EOL );
			break;
		case -3:
			notice( t('Message could not be sent.') . EOL );
			break;
		case -4:
			notice( t('Message collection failure.') . EOL );
			break;
		default:
			info( t('Message sent.') . EOL );
	}

	// fake it to go back to the input form if no recipient listed

	if($norecip) {
		$a->argc = 2;
		$a->argv[1] = 'new';
	}
	else
		goaway($_SESSION['return_url']);

}

// Note: the code in 'item_extract_images' and 'item_redir_and_replace_images'
// is identical to the code in include/conversation.php
if(! function_exists('item_extract_images')) {
function item_extract_images($body) {

	$saved_image = array();
	$orig_body = $body;
	$new_body = '';

	$cnt = 0;
	$img_start = strpos($orig_body, '[img');
	$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
	$img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
	while(($img_st_close !== false) && ($img_end !== false)) {

		$img_st_close++; // make it point to AFTER the closing bracket
		$img_end += $img_start;

		if(! strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) {
			// This is an embedded image

			$saved_image[$cnt] = substr($orig_body, $img_start + $img_st_close, $img_end - ($img_start + $img_st_close));
			$new_body = $new_body . substr($orig_body, 0, $img_start) . '[!#saved_image' . $cnt . '#!]';

			$cnt++;
		}
		else
			$new_body = $new_body . substr($orig_body, 0, $img_end + strlen('[/img]'));

		$orig_body = substr($orig_body, $img_end + strlen('[/img]'));

		if($orig_body === false) // in case the body ends on a closing image tag
			$orig_body = '';

		$img_start = strpos($orig_body, '[img');
		$img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
		$img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false);
	}

	$new_body = $new_body . $orig_body;

	return array('body' => $new_body, 'images' => $saved_image);
}}

if(! function_exists('item_redir_and_replace_images')) {
function item_redir_and_replace_images($body, $images, $cid) {

	$origbody = $body;
	$newbody = '';

	for($i = 0; $i < count($images); $i++) {
		$search = '/\[url\=(.*?)\]\[!#saved_image' . $i . '#!\]\[\/url\]' . '/is';
		$replace = '[url=' . System::baseUrl() . '/redir/' . $cid
		           . '?f=1&url=' . '$1' . '][!#saved_image' . $i . '#!][/url]' ;

		$img_end = strpos($origbody, '[!#saved_image' . $i . '#!][/url]') + strlen('[!#saved_image' . $i . '#!][/url]');
		$process_part = substr($origbody, 0, $img_end);
		$origbody = substr($origbody, $img_end);

		$process_part = preg_replace($search, $replace, $process_part);
		$newbody = $newbody . $process_part;
	}
	$newbody = $newbody . $origbody;

	$cnt = 0;
	foreach ($images as $image) {
		// We're depending on the property of 'foreach' (specified on the PHP website) that
		// it loops over the array starting from the first element and going sequentially
		// to the last element
		$newbody = str_replace('[!#saved_image' . $cnt . '#!]', '[img]' . $image . '[/img]', $newbody);
		$cnt++;
	}

	return $newbody;
}}


function message_content(App $a) {

	$o = '';
	nav_set_selected('messages');

	if (! local_user()) {
		notice( t('Permission denied.') . EOL);
		return;
	}

	$myprofile = System::baseUrl().'/profile/' . $a->user['nickname'];

	$tpl = get_markup_template('mail_head.tpl');
	$header = replace_macros($tpl, array(
		'$messages' => t('Messages'),
		'$tab_content' => $tab_content
	));


	if(($a->argc == 3) && ($a->argv[1] === 'drop' || $a->argv[1] === 'dropconv')) {
		if(! intval($a->argv[2]))
			return;

		// Check if we should do HTML-based delete confirmation
		if($_REQUEST['confirm']) {
			// <form> can't take arguments in its "action" parameter
			// so add any arguments as hidden inputs
			$query = explode_querystring($a->query_string);
			$inputs = array();
			foreach($query['args'] as $arg) {
				if(strpos($arg, 'confirm=') === false) {
					$arg_parts = explode('=', $arg);
					$inputs[] = array('name' => $arg_parts[0], 'value' => $arg_parts[1]);
				}
			}

			//$a->page['aside'] = '';
			return replace_macros(get_markup_template('confirm.tpl'), array(
				'$method' => 'get',
				'$message' => t('Do you really want to delete this message?'),
				'$extra_inputs' => $inputs,
				'$confirm' => t('Yes'),
				'$confirm_url' => $query['base'],
				'$confirm_name' => 'confirmed',
				'$cancel' => t('Cancel'),
			));
		}
		// Now check how the user responded to the confirmation query
		if($_REQUEST['canceled']) {
			goaway($_SESSION['return_url']);
		}

		$cmd = $a->argv[1];
		if($cmd === 'drop') {
			$r = q("DELETE FROM `mail` WHERE `id` = %d AND `uid` = %d LIMIT 1",
				intval($a->argv[2]),
				intval(local_user())
			);
			if ($r) {
				info( t('Message deleted.') . EOL );
			}
			//goaway(System::baseUrl(true) . '/message' );
			goaway($_SESSION['return_url']);
		}
		else {
			$r = q("SELECT `parent-uri`,`convid` FROM `mail` WHERE `id` = %d AND `uid` = %d LIMIT 1",
				intval($a->argv[2]),
				intval(local_user())
			);
			if (dbm::is_result($r)) {
				$parent = $r[0]['parent-uri'];
				$convid = $r[0]['convid'];

				$r = q("DELETE FROM `mail` WHERE `parent-uri` = '%s' AND `uid` = %d ",
					dbesc($parent),
					intval(local_user())
				);

				// remove diaspora conversation pointer
				// Actually if we do this, we can never receive another reply to that conversation,
				// as we will never again have the info we need to re-create it.
				// We'll just have to orphan it.

				//if($convid) {
				//	q("delete from conv where id = %d limit 1",
				//		intval($convid)
				//	);
				//}

				if($r)
					info( t('Conversation removed.') . EOL );
			}
			//goaway(System::baseUrl(true) . '/message' );
			goaway($_SESSION['return_url']);
		}

	}

	if(($a->argc > 1) && ($a->argv[1] === 'new')) {

		$o .= $header;

		$tpl = get_markup_template('msg-header.tpl');
		$a->page['htmlhead'] .= replace_macros($tpl, array(
			'$baseurl' => System::baseUrl(true),
			'$nickname' => $a->user['nickname'],
			'$linkurl' => t('Please enter a link URL:')
		));

		$tpl = get_markup_template('msg-end.tpl');
		$a->page['end'] .= replace_macros($tpl, array(
			'$baseurl' => System::baseUrl(true),
			'$nickname' => $a->user['nickname'],
			'$linkurl' => t('Please enter a link URL:')
		));

		$preselect = (isset($a->argv[2])?array($a->argv[2]):false);


		$prename = $preurl = $preid = '';

		if($preselect) {
			$r = q("SELECT `name`, `url`, `id` FROM `contact` WHERE `uid` = %d AND `id` = %d LIMIT 1",
				intval(local_user()),
				intval($a->argv[2])
			);
			if (!dbm::is_result($r)) {
				$r = q("SELECT `name`, `url`, `id` FROM `contact` WHERE `uid` = %d AND `nurl` = '%s' LIMIT 1",
					intval(local_user()),
					dbesc(normalise_link(base64_decode($a->argv[2])))
				);
			}

			if (!dbm::is_result($r)) {
				$r = q("SELECT `name`, `url`, `id` FROM `contact` WHERE `uid` = %d AND `addr` = '%s' LIMIT 1",
					intval(local_user()),
					dbesc(base64_decode($a->argv[2]))
				);
			}

			if (dbm::is_result($r)) {
				$prename = $r[0]['name'];
				$preurl = $r[0]['url'];
				$preid = $r[0]['id'];
				$preselect = array($preid);
			} else
				$preselect = false;
		}

		$prefill = (($preselect) ? $prename  : '');

		// the ugly select box

		$select = contact_select('messageto','message-to-select', $preselect, 4, true, false, false, 10);

		$tpl = get_markup_template('prv_message.tpl');
		$o .= replace_macros($tpl,array(
			'$header' => t('Send Private Message'),
			'$to' => t('To:'),
			'$showinputs' => 'true',
			'$prefill' => $prefill,
			'$autocomp' => $autocomp,
			'$preid' => $preid,
			'$subject' => t('Subject:'),
			'$subjtxt' => ((x($_REQUEST,'subject')) ? strip_tags($_REQUEST['subject']) : ''),
			'$text' => ((x($_REQUEST,'body')) ? escape_tags(htmlspecialchars($_REQUEST['body'])) : ''),
			'$readonly' => '',
			'$yourmessage' => t('Your message:'),
			'$select' => $select,
			'$parent' => '',
			'$upload' => t('Upload photo'),
			'$insert' => t('Insert web link'),
			'$wait' => t('Please wait'),
			'$submit' => t('Submit')
		));
		return $o;
	}


	$_SESSION['return_url'] = $a->query_string;

	if ($a->argc == 1) {

		// List messages

		$o .= $header;

		$r = q("SELECT count(*) AS `total`, ANY_VALUE(`created`) AS `created` FROM `mail`
			WHERE `mail`.`uid` = %d GROUP BY `parent-uri` ORDER BY `created` DESC",
			intval(local_user())
		);

		if (dbm::is_result($r)) {
			$a->set_pager_total($r[0]['total']);
		}

		$r = get_messages(local_user(), $a->pager['start'], $a->pager['itemspage']);

		if (! dbm::is_result($r)) {
			info( t('No messages.') . EOL);
			return $o;
		}

		$o .= render_messages($r, 'mail_list.tpl');

		$o .= paginate($a);

		return $o;
	}

	if(($a->argc > 1) && (intval($a->argv[1]))) {

		$o .= $header;

		$r = q("SELECT `mail`.*, `contact`.`name`, `contact`.`url`, `contact`.`thumb`
			FROM `mail` LEFT JOIN `contact` ON `mail`.`contact-id` = `contact`.`id`
			WHERE `mail`.`uid` = %d AND `mail`.`id` = %d LIMIT 1",
			intval(local_user()),
			intval($a->argv[1])
		);
		if (dbm::is_result($r)) {
			$contact_id = $r[0]['contact-id'];
			$convid = $r[0]['convid'];

			$sql_extra = sprintf(" and `mail`.`parent-uri` = '%s' ", dbesc($r[0]['parent-uri']));
			if($convid)
				$sql_extra = sprintf(" and ( `mail`.`parent-uri` = '%s' OR `mail`.`convid` = '%d' ) ",
					dbesc($r[0]['parent-uri']),
					intval($convid)
				);

			$messages = q("SELECT `mail`.*, `contact`.`name`, `contact`.`url`, `contact`.`thumb`
				FROM `mail` LEFT JOIN `contact` ON `mail`.`contact-id` = `contact`.`id`
				WHERE `mail`.`uid` = %d $sql_extra ORDER BY `mail`.`created` ASC",
				intval(local_user())
			);
		}
		if(! count($messages)) {
			notice( t('Message not available.') . EOL );
			return $o;
		}

		$r = q("UPDATE `mail` SET `seen` = 1 WHERE `parent-uri` = '%s' AND `uid` = %d",
			dbesc($r[0]['parent-uri']),
			intval(local_user())
		);

		require_once("include/bbcode.php");

		$tpl = get_markup_template('msg-header.tpl');
		$a->page['htmlhead'] .= replace_macros($tpl, array(
			'$baseurl' => System::baseUrl(true),
			'$nickname' => $a->user['nickname'],
			'$linkurl' => t('Please enter a link URL:')
		));

		$tpl = get_markup_template('msg-end.tpl');
		$a->page['end'] .= replace_macros($tpl, array(
			'$baseurl' => System::baseUrl(true),
			'$nickname' => $a->user['nickname'],
			'$linkurl' => t('Please enter a link URL:')
		));

		$mails = array();
		$seen = 0;
		$unknown = false;

		foreach($messages as $message) {
			if($message['unknown'])
				$unknown = true;
			if($message['from-url'] == $myprofile) {
				$from_url = $myprofile;
				$sparkle = '';
			} elseif ($message['contact-id'] != 0) {
				$from_url = 'redir/'.$message['contact-id'];
				$sparkle = ' sparkle';
			} else {
				$from_url = $message['from-url']."?zrl=".urlencode($myprofile);
				$sparkle = ' sparkle';
			}


			$extracted = item_extract_images($message['body']);
			if($extracted['images'])
				$message['body'] = item_redir_and_replace_images($extracted['body'], $extracted['images'], $message['contact-id']);

			if($a->theme['template_engine'] === 'internal') {
				$from_name_e = template_escape($message['from-name']);
				$subject_e = template_escape($message['title']);
				$body_e = template_escape(Smilies::replace(bbcode($message['body'])));
				$to_name_e = template_escape($message['name']);
			} else {
				$from_name_e = $message['from-name'];
				$subject_e = $message['title'];
				$body_e = Smilies::replace(bbcode($message['body']));
				$to_name_e = $message['name'];
			}

			$contact = get_contact_details_by_url($message['from-url']);
			if (isset($contact["thumb"]))
				$from_photo = $contact["thumb"];
			else
				$from_photo = $message['from-photo'];

			$mails[] = array(
				'id' => $message['id'],
				'from_name' => $from_name_e,
				'from_url' => $from_url,
				'sparkle' => $sparkle,
				'from_photo' => proxy_url($from_photo, false, PROXY_SIZE_THUMB),
				'subject' => $subject_e,
				'body' => $body_e,
				'delete' => t('Delete message'),
				'to_name' => $to_name_e,
				'date' => datetime_convert('UTC',date_default_timezone_get(),$message['created'],'D, d M Y - g:i A'),
                                'ago' => relative_date($message['created']),
			);

			$seen = $message['seen'];
		}


		$select = $message['name'] . '<input type="hidden" name="messageto" value="' . $contact_id . '" />';
		$parent = '<input type="hidden" name="replyto" value="' . $message['parent-uri'] . '" />';

		$tpl = get_markup_template('mail_display.tpl');

		if($a->theme['template_engine'] === 'internal') {
			$subjtxt_e = template_escape($message['title']);
		}
		else {
			$subjtxt_e = $message['title'];
		}

		$o = replace_macros($tpl, array(
			'$thread_id' => $a->argv[1],
			'$thread_subject' => $message['title'],
			'$thread_seen' => $seen,
			'$delete' =>  t('Delete conversation'),
			'$canreply' => (($unknown) ? false : '1'),
			'$unknown_text' => t("No secure communications available. You <strong>may</strong> be able to respond from the sender's profile page."),
			'$mails' => $mails,

			// reply
			'$header' => t('Send Reply'),
			'$to' => t('To:'),
			'$showinputs' => '',
			'$subject' => t('Subject:'),
			'$subjtxt' => $subjtxt_e,
			'$readonly' => ' readonly="readonly" style="background: #BBBBBB;" ',
			'$yourmessage' => t('Your message:'),
			'$text' => '',
			'$select' => $select,
			'$parent' => $parent,
			'$upload' => t('Upload photo'),
			'$insert' => t('Insert web link'),
			'$submit' => t('Submit'),
			'$wait' => t('Please wait')

		));

		return $o;
	}
}

function get_messages($user, $lstart, $lend) {
	//TODO: rewritte with a sub-query to get the first message of each private thread with certainty
	return q("SELECT max(`mail`.`created`) AS `mailcreated`, min(`mail`.`seen`) AS `mailseen`,
		ANY_VALUE(`mail`.`id`) AS `id`, ANY_VALUE(`mail`.`uid`) AS `uid`, ANY_VALUE(`mail`.`guid`) AS `guid`,
		ANY_VALUE(`mail`.`from-name`) AS `from-name`, ANY_VALUE(`mail`.`from-photo`) AS `from-photo`,
		ANY_VALUE(`mail`.`from-url`) AS `from-url`, ANY_VALUE(`mail`.`contact-id`) AS `contact-id`,
		ANY_VALUE(`mail`.`convid`) AS `convid`, ANY_VALUE(`mail`.`title`) AS `title`, ANY_VALUE(`mail`.`body`) AS `body`,
		ANY_VALUE(`mail`.`seen`) AS `seen`, ANY_VALUE(`mail`.`reply`) AS `reply`, ANY_VALUE(`mail`.`replied`) AS `replied`,
		ANY_VALUE(`mail`.`unknown`) AS `unknown`, ANY_VALUE(`mail`.`uri`) AS `uri`,
		`mail`.`parent-uri`,
		ANY_VALUE(`mail`.`created`) AS `created`, ANY_VALUE(`contact`.`name`) AS `name`, ANY_VALUE(`contact`.`url`) AS `url`,
		ANY_VALUE(`contact`.`thumb`) AS `thumb`, ANY_VALUE(`contact`.`network`) AS `network`,
		count( * ) as `count`
		FROM `mail` LEFT JOIN `contact` ON `mail`.`contact-id` = `contact`.`id`
		WHERE `mail`.`uid` = %d GROUP BY `parent-uri` ORDER BY `mailcreated` DESC LIMIT %d , %d ",
		intval($user), intval($lstart), intval($lend)
	);
}

function render_messages(array $msg, $t) {

	$a = get_app();

	$tpl = get_markup_template($t);
	$rslt = '';

	$myprofile = System::baseUrl().'/profile/' . $a->user['nickname'];

	foreach($msg as $rr) {

		if($rr['unknown'])
			$participants = sprintf( t("Unknown sender - %s"),$rr['from-name']);
		elseif (link_compare($rr['from-url'], $myprofile))
			$participants = sprintf( t("You and %s"), $rr['name']);
		else
			$participants = sprintf(t("%s and You"), $rr['from-name']);

		if($a->theme['template_engine'] === 'internal') {
			$subject_e = template_escape((($rr['mailseen']) ? $rr['title'] : '<strong>' . $rr['title'] . '</strong>'));
			$body_e = template_escape($rr['body']);
			$to_name_e = template_escape($rr['name']);
		}
		else {
			$subject_e = (($rr['mailseen']) ? $rr['title'] : '<strong>' . $rr['title'] . '</strong>');
			$body_e = $rr['body'];
			$to_name_e = $rr['name'];
		}

		$contact = get_contact_details_by_url($rr['url']);
		if (isset($contact["thumb"]))
			$from_photo = $contact["thumb"];
		else
			$from_photo = (($rr['thumb']) ? $rr['thumb'] : $rr['from-photo']);

		$rslt .= replace_macros($tpl, array(
			'$id' => $rr['id'],
			'$from_name' => $participants,
			'$from_url' => (($rr['network'] === NETWORK_DFRN) ? 'redir/' . $rr['contact-id'] : $rr['url']),
			'$sparkle' => ' sparkle',
			'$from_photo' => proxy_url($from_photo, false, PROXY_SIZE_THUMB),
			'$subject' => $subject_e,
			'$delete' => t('Delete conversation'),
			'$body' => $body_e,
			'$to_name' => $to_name_e,
			'$date' => datetime_convert('UTC',date_default_timezone_get(),$rr['mailcreated'], t('D, d M Y - g:i A')),
															'$ago' => relative_date($rr['mailcreated']),
			'$seen' => $rr['mailseen'],
			'$count' => sprintf( tt('%d message', '%d messages', $rr['count']), $rr['count']),
		));
	}

	return $rslt;
}