From: Michael <heluecht@pirati.ca>
Date: Sat, 9 Jun 2018 16:56:37 +0000 (+0000)
Subject: The central item fetch does work now and the API now uses these functions
X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=baf316e89808b1480f1fa69916cc2b60c343993b;p=friendica.git

The central item fetch does work now and the API now uses these functions
---

diff --git a/include/api.php b/include/api.php
index 91a8d42c46..4cc9826c46 100644
--- a/include/api.php
+++ b/include/api.php
@@ -686,14 +686,8 @@ function api_get_user(App $a, $contact_id = null)
 			$uinfo[0]['network'] = NETWORK_DFRN;
 		}
 
-		$usr = q(
-			"SELECT * FROM `user` WHERE `uid` = %d LIMIT 1",
-			intval(api_user())
-		);
-		$profile = q(
-			"SELECT * FROM `profile` WHERE `uid` = %d AND `is-default` = 1 LIMIT 1",
-			intval(api_user())
-		);
+		$usr = dba::selectFirst('user', ['default-location'], ['uid' => api_user()]);
+		$profile = dba::selectFirst('profile', ['about'], ['uid' => api_user(), 'is-default' => true]);
 
 		/// @TODO old-lost code? (twice)
 		// Counting is deactivated by now, due to performance issues
@@ -760,14 +754,14 @@ function api_get_user(App $a, $contact_id = null)
 
 	$pcontact_id  = Contact::getIdForURL($uinfo[0]['url'], 0, true);
 
-	if (!empty($profile[0]['about'])) {
-		$description = $profile[0]['about'];
+	if (!empty($profile['about'])) {
+		$description = $profile['about'];
 	} else {
 		$description = $uinfo[0]["about"];
 	}
 
-	if (!empty($usr[0]['default-location'])) {
-		$location = $usr[0]['default-location'];
+	if (!empty($usr['default-location'])) {
+		$location = $usr['default-location'];
 	} elseif (!empty($uinfo[0]["location"])) {
 		$location = $uinfo[0]["location"];
 	} else {
@@ -1602,7 +1596,6 @@ function api_search($type)
 	}
 
 	$data = [];
-	$sql_extra = '';
 
 	if (!x($_REQUEST, 'q')) {
 		throw new BadRequestException("q parameter is required.");
@@ -1622,24 +1615,20 @@ function api_search($type)
 
 	$start = $page * $count;
 
-	if ($max_id > 0) {
-		$sql_extra .= ' AND `item`.`id` <= ' . intval($max_id);
-	}
+        $condition = ["`verb` = ? AND `item`.`id` > ?
+		AND (`item`.`uid` = 0 OR (`item`.`uid` = ? AND NOT `item`.`global`))
+		AND `item`.`body` LIKE CONCAT('%',?,'%')",
+		ACTIVITY_POST, $since_id, api_user(), $_REQUEST['q']];
 
-	$r = dba::p(
-		"SELECT ".item_fieldlists()."
-		FROM `item` ".item_joins(api_user())."
-		WHERE ".item_condition()." AND (`item`.`uid` = 0 OR (`item`.`uid` = ? AND NOT `item`.`global`))
-		AND `item`.`body` LIKE CONCAT('%',?,'%')
-		$sql_extra
-		AND `item`.`id`>?
-		ORDER BY `item`.`id` DESC LIMIT ".intval($start)." ,".intval($count)." ",
-		api_user(),
-		$_REQUEST['q'],
-		$since_id
-	);
+        if ($max_id > 0) {
+                $condition[0] .= " AND `item`.`id` <= ?";
+                $condition[] = $max_id;
+        }
+
+	$params = ['order' => ['id' => true], 'limit' => [$start, $count]];
+        $statuses = Item::select(api_user(), [], $condition, $params);
 
-	$data['status'] = api_format_items(dba::inArray($r), $user_info);
+	$data['status'] = api_format_items(dba::inArray($statuses), $user_info);
 
 	return api_format_data("statuses", $type, $data);
 }
@@ -1689,33 +1678,24 @@ function api_statuses_home_timeline($type)
 
 	$start = $page * $count;
 
-	$sql_extra = '';
+	$condition = ["`uid` = ? AND `verb` = ? AND `item`.`id` > ?", api_user(), ACTIVITY_POST, $since_id];
+
 	if ($max_id > 0) {
-		$sql_extra .= ' AND `item`.`id` <= ' . intval($max_id);
+		$condition[0] .= " AND `item`.`id` <= ?";
+		$condition[] = $max_id;
 	}
 	if ($exclude_replies > 0) {
-		$sql_extra .= ' AND `item`.`parent` = `item`.`id`';
+		$condition[0] .= ' AND `item`.`parent` = `item`.`id`';
 	}
 	if ($conversation_id > 0) {
-		$sql_extra .= ' AND `item`.`parent` = ' . intval($conversation_id);
+		$condition[0] .= " AND `item`.`parent` = ?";
+		$condition[] = $conversation_id;
 	}
 
-	$r = q("SELECT `item`.* FROM `item`
-		STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
-			AND (NOT `contact`.`blocked` OR `contact`.`pending`)
-		WHERE `item`.`uid` = %d AND `verb` = '%s'
-		AND `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
-		$sql_extra
-		AND `item`.`id` > %d
-		ORDER BY `item`.`id` DESC LIMIT %d ,%d",
-		intval(api_user()),
-		dbesc(ACTIVITY_POST),
-		intval($since_id),
-		intval($start),
-		intval($count)
-	);
+	$params = ['order' => ['id' => true], 'limit' => [$start, $count]];
+	$statuses = Item::select(api_user(), [], $condition, $params);
 
-	$ret = api_format_items($r, $user_info, false, $type);
+	$ret = api_format_items(dba::inArray($statuses), $user_info, false, $type);
 
 	// Set all posts from the query above to seen
 	$idarray = [];
@@ -1779,61 +1759,35 @@ function api_statuses_public_timeline($type)
 	$sql_extra = '';
 
 	if ($exclude_replies && !$conversation_id) {
-		if ($max_id > 0) {
-			$sql_extra = 'AND `thread`.`iid` <= ' . intval($max_id);
-		}
-
-		$r = dba::p(
-			"SELECT " . item_fieldlists() . "
-			FROM `thread`
-			STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid`
-			" . item_joins(api_user()) . "
-			STRAIGHT_JOIN `user` ON `user`.`uid` = `thread`.`uid`
-				AND NOT `user`.`hidewall`
-			AND `verb` = ?
-			AND NOT `thread`.`private`
-			AND `thread`.`wall`
-			AND `thread`.`visible`
-			AND NOT `thread`.`deleted`
-			AND NOT `thread`.`moderated`
-			AND `thread`.`iid` > ?
-			$sql_extra
-			ORDER BY `thread`.`iid` DESC
-			LIMIT " . intval($start) . ", " . intval($count),
-			ACTIVITY_POST,
-			$since_id
-		);
+		$condition = ["`verb` = ? AND `iid` > ? AND NOT `private` AND `wall` AND NOT `user`.`hidewall`",
+			ACTIVITY_POST, $since_id];
+
+	        if ($max_id > 0) {
+	                $condition[0] .= " AND `thread`.`iid` <= ?";
+	                $condition[] = $max_id;
+	        }
+
+	        $params = ['order' => ['iid' => true], 'limit' => [$start, $count]];
+	        $statuses = Item::selectThread(api_user(), [], $condition, $params);
 
-		$r = dba::inArray($r);
+		$r = dba::inArray($statuses);
 	} else {
-		if ($max_id > 0) {
-			$sql_extra = 'AND `item`.`id` <= ' . intval($max_id);
-		}
-		if ($conversation_id > 0) {
-			$sql_extra .= ' AND `item`.`parent` = ' . intval($conversation_id);
-		}
-
-		$r = dba::p(
-			"SELECT " . item_fieldlists() . "
-			FROM `item`
-			" . item_joins(api_user()) . "
-			STRAIGHT_JOIN `user` ON `user`.`uid` = `item`.`uid`
-				AND NOT `user`.`hidewall`
-			AND `verb` = ?
-			AND NOT `item`.`private`
-			AND `item`.`wall`
-			AND `item`.`visible`
-			AND NOT `item`.`deleted`
-			AND NOT `item`.`moderated`
-			AND `item`.`id` > ?
-			$sql_extra
-			ORDER BY `item`.`id` DESC
-			LIMIT " . intval($start) . ", " . intval($count),
-			ACTIVITY_POST,
-			$since_id
-		);
+		$condition = ["`uid` = ? AND `verb` = ? AND `id` > ? AND NOT `user`.`hidewall` AND `item`.`origin`",
+			api_user(), ACTIVITY_POST, $since_id];
+
+	        if ($max_id > 0) {
+	                $condition[0] .= " AND `item`.`id` <= ?";
+	                $condition[] = $max_id;
+	        }
+	        if ($conversation_id > 0) {
+	                $condition[0] .= " AND `item`.`parent` = ?";
+	                $condition[] = $conversation_id;
+	        }
 
-		$r = dba::inArray($r);
+	        $params = ['order' => ['id' => true], 'limit' => [$start, $count]];
+	        $statuses = Item::select(api_user(), [], $condition, $params);
+
+		$r = dba::inArray($statuses);
 	}
 
 	$ret = api_format_items($r, $user_info, false, $type);
@@ -1881,33 +1835,18 @@ function api_statuses_networkpublic_timeline($type)
 	}
 	$start = ($page - 1) * $count;
 
-	$sql_extra = '';
-	if ($max_id > 0) {
-		$sql_extra = 'AND `thread`.`iid` <= ' . intval($max_id);
-	}
-
-	$r = dba::p(
-		"SELECT " . item_fieldlists() . "
-		FROM `thread`
-		STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid`
-		" . item_joins(api_user()) . "
-		WHERE `thread`.`uid` = 0
-		AND `verb` = ?
-		AND NOT `thread`.`private`
-		AND `thread`.`visible`
-		AND NOT `thread`.`deleted`
-		AND NOT `thread`.`moderated`
-		AND `thread`.`iid` > ?
-		$sql_extra
-		ORDER BY `thread`.`iid` DESC
-		LIMIT " . intval($start) . ", " . intval($count),
-		ACTIVITY_POST,
-		$since_id
-	);
+	$condition = ["`uid` = 0 AND `verb` = ? AND `thread`.`iid` > ? AND NOT `private`",
+		ACTIVITY_POST, $since_id];
 
-	$r = dba::inArray($r);
+        if ($max_id > 0) {
+                $condition[0] .= " AND `thread`.`iid` <= ?";
+                $condition[] = $max_id;
+        }
 
-	$ret = api_format_items($r, $user_info, false, $type);
+        $params = ['order' => ['iid' => true], 'limit' => [$start, $count]];
+        $statuses = Item::selectThread(api_user(), [], $condition, $params);
+
+	$ret = api_format_items(dba::inArray($statuses), $user_info, false, $type);
 
 	$data = ['status' => $ret];
 	switch ($type) {
@@ -1955,13 +1894,6 @@ function api_statuses_show($type)
 
 	$conversation = (x($_REQUEST, 'conversation') ? 1 : 0);
 
-	$sql_extra = '';
-	if ($conversation) {
-		$sql_extra .= " AND `item`.`parent` = %d ORDER BY `id` ASC ";
-	} else {
-		$sql_extra .= " AND `item`.`id` = %d";
-	}
-
 	// try to fetch the item for the local user - or the public item, if there is no local one
 	$uri_item = dba::selectFirst('item', ['uri'], ['id' => $id]);
 	if (!DBM::is_result($uri_item)) {
@@ -1975,24 +1907,22 @@ function api_statuses_show($type)
 
 	$id = $item['id'];
 
-	$r = q(
-		"SELECT `item`.* FROM `item`
-		STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
-			AND (NOT `contact`.`blocked` OR `contact`.`pending`)
-		WHERE `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
-		AND `item`.`uid` IN (0, %d) AND `item`.`verb` = '%s'
-		$sql_extra",
-		intval(api_user()),
-		dbesc(ACTIVITY_POST),
-		intval($id)
-	);
+	if ($conversation) {
+		$condition = ['parent' => $id, 'verb' => ACTIVITY_POST];
+		$params = ['order' => ['id' => true]];
+	} else {
+		$condition = ['id' => $id, 'verb' => ACTIVITY_POST];
+		$params = [];
+	}
+
+	$statuses = Item::select(api_user(), [], $condition, $params);
 
 	/// @TODO How about copying this to above methods which don't check $r ?
-	if (!DBM::is_result($r)) {
+	if (!DBM::is_result($items)) {
 		throw new BadRequestException("There is no status with this id.");
 	}
 
-	$ret = api_format_items($r, $user_info, false, $type);
+	$ret = api_format_items(dba::inArray($statuses), $user_info, false, $type);
 
 	if ($conversation) {
 		$data = ['status' => $ret];
@@ -2057,33 +1987,22 @@ function api_conversation_show($type)
 
 	$id = $parent['id'];
 
-	$sql_extra = '';
+	$condition = ["`parent` = ? AND `uid` IN (0, ?) AND `verb` = ? AND `item`.`id` > ?",
+		$id, api_user(), ACTIVITY_POST, $since_id];
 
 	if ($max_id > 0) {
-		$sql_extra = ' AND `item`.`id` <= ' . intval($max_id);
-	}
-
-	$r = q("SELECT `item`.* FROM `item`
-		STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
-			AND (NOT `contact`.`blocked` OR `contact`.`pending`)
-		WHERE `item`.`parent` = %d AND `item`.`visible`
-		AND NOT `item`.`moderated` AND NOT `item`.`deleted`
-		AND `item`.`uid` IN (0, %d) AND `item`.`verb` = '%s'
-		AND `item`.`id`>%d $sql_extra
-		ORDER BY `item`.`id` DESC LIMIT %d ,%d",
-		intval($id),
-		intval(api_user()),
-		dbesc(ACTIVITY_POST),
-		intval($since_id),
-		intval($start),
-		intval($count)
-	);
+		$condition[0] .= " AND `item`.`id` <= ?";
+		$condition[] = $max_id;
+	}
 
-	if (!DBM::is_result($r)) {
-		throw new BadRequestException("There is no status with this id.");
+	$params = ['order' => ['id' => true], 'limit' => [$start, $count]];
+	$statuses = Item::select(api_user(), [], $condition, $params);
+
+	if (!DBM::is_result($items)) {
+		throw new BadRequestException("There is no status with id $id.");
 	}
 
-	$ret = api_format_items($r, $user_info, false, $type);
+	$ret = api_format_items(dba::inArray($statuses), $user_info, false, $type);
 
 	$data = ['status' => $ret];
 	return api_format_data("statuses", $type, $data);
@@ -2126,24 +2045,17 @@ function api_statuses_repeat($type)
 
 	logger('API: api_statuses_repeat: '.$id);
 
-	$r = q("SELECT `item`.* FROM `item`
-		STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
-			AND (NOT `contact`.`blocked` OR `contact`.`pending`)
-		WHERE `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
-		AND NOT `item`.`private`
-		AND `item`.`id`=%d",
-		intval($id)
-	);
+	$fields = ['body', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink'];
+	$item = Item::selectFirst(api_user(), $fields, ['id' => $id, 'private' => false]);
 
-	/// @TODO other style than above functions!
-	if (DBM::is_result($r) && $r[0]['body'] != "") {
-		if (strpos($r[0]['body'], "[/share]") !== false) {
-			$pos = strpos($r[0]['body'], "[share");
-			$post = substr($r[0]['body'], $pos);
+	if (DBM::is_result($item) && $item['body'] != "") {
+		if (strpos($item['body'], "[/share]") !== false) {
+			$pos = strpos($item['body'], "[share");
+			$post = substr($item['body'], $pos);
 		} else {
-			$post = share_header($r[0]['author-name'], $r[0]['author-link'], $r[0]['author-avatar'], $r[0]['guid'], $r[0]['created'], $r[0]['plink']);
+			$post = share_header($item['author-name'], $item['author-link'], $item['author-avatar'], $item['guid'], $item['created'], $item['plink']);
 
-			$post .= $r[0]['body'];
+			$post .= $item['body'];
 			$post .= "[/share]";
 		}
 		$_REQUEST['body'] = $post;
@@ -2244,32 +2156,19 @@ function api_statuses_mentions($type)
 
 	$start = ($page - 1) * $count;
 
-	$sql_extra = '';
+	$condition = ["`uid` = ? AND `verb` = ? AND `item`.`id` > ? AND `author-id` != ?
+		AND `item`.`parent` IN (SELECT `iid` FROM `thread` WHERE `uid` = ? AND `mention` AND NOT `ignored`)",
+		api_user(), ACTIVITY_POST, $since_id, $user_info['pid'], api_user()];
 
 	if ($max_id > 0) {
-		$sql_extra = ' AND `item`.`id` <= ' . intval($max_id);
+		$condition[0] .= " AND `item`.`id` <= ?";
+		$condition[] = $max_id;
 	}
 
-	$r = q("SELECT `item`.* FROM `item` FORCE INDEX (`uid_id`)
-		STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
-			AND (NOT `contact`.`blocked` OR `contact`.`pending`)
-		WHERE `item`.`uid` = %d AND `item`.`verb` = '%s'
-		AND `item`.`author-id` != %d
-		AND `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
-		AND `item`.`parent` IN (SELECT `iid` FROM `thread` WHERE `uid` = %d AND `mention` AND NOT `ignored`)
-		$sql_extra
-		AND `item`.`id` > %d
-		ORDER BY `item`.`id` DESC LIMIT %d ,%d",
-		intval(api_user()),
-		dbesc(ACTIVITY_POST),
-		intval($user_info['pid']),
-		intval(api_user()),
-		intval($since_id),
-		intval($start),
-		intval($count)
-	);
+	$params = ['order' => ['id' => true], 'limit' => [$start, $count]];
+	$statuses = Item::select(api_user(), [], $condition, $params);
 
-	$ret = api_format_items($r, $user_info, false, $type);
+	$ret = api_format_items(dba::inArray($statuses), $user_info, false, $type);
 
 	$data = ['status' => $ret];
 	switch ($type) {
@@ -2325,41 +2224,31 @@ function api_statuses_user_timeline($type)
 	}
 	$start = ($page - 1) * $count;
 
-	$sql_extra = '';
+	$condition = ["`uid` = ? AND `verb` = ? AND `item`.`id` > ? AND `item`.`contact-id` = ?",
+		api_user(), ACTIVITY_POST, $since_id, $user_info['cid']];
+
 	if ($user_info['self'] == 1) {
-		$sql_extra .= " AND `item`.`wall` = 1 ";
+		$condition[0] .= ' AND `item`.`wall` ';
 	}
 
 	if ($exclude_replies > 0) {
-		$sql_extra .= ' AND `item`.`parent` = `item`.`id`';
+		$condition[0] .= ' AND `item`.`parent` = `item`.`id`';
 	}
 
 	if ($conversation_id > 0) {
-		$sql_extra .= ' AND `item`.`parent` = ' . intval($conversation_id);
+		$condition[0] .= " AND `item`.`parent` = ?";
+		$condition[] = $conversation_id;
 	}
 
 	if ($max_id > 0) {
-		$sql_extra .= ' AND `item`.`id` <= ' . intval($max_id);
+		$condition[0] .= " AND `item`.`id` <= ?";
+		$condition[] = $max_id;
 	}
 
-	$r = q("SELECT `item`.* FROM `item` FORCE INDEX (`uid_contactid_id`)
-		STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
-			AND (NOT `contact`.`blocked` OR `contact`.`pending`)
-		WHERE `item`.`uid` = %d AND `verb` = '%s'
-		AND `item`.`contact-id` = %d
-		AND `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
-		$sql_extra
-		AND `item`.`id` > %d
-		ORDER BY `item`.`id` DESC LIMIT %d ,%d",
-		intval(api_user()),
-		dbesc(ACTIVITY_POST),
-		intval($user_info['cid']),
-		intval($since_id),
-		intval($start),
-		intval($count)
-	);
+	$params = ['order' => ['id' => true], 'limit' => [$start, $count]];
+	$statuses = Item::select(api_user(), [], $condition, $params);
 
-	$ret = api_format_items($r, $user_info, true, $type);
+	$ret = api_format_items(dba::inArray($statuses), $user_info, true, $type);
 
 	$data = ['status' => $ret];
 	switch ($type) {
@@ -2409,24 +2298,24 @@ function api_favorites_create_destroy($type)
 		$itemid = intval($_REQUEST['id']);
 	}
 
-	$item = q("SELECT * FROM `item` WHERE `id`=%d AND `uid`=%d LIMIT 1", $itemid, api_user());
+        $item = Item::selectFirst(api_user(), [], ['id' => $itemid, 'uid' => api_user()]);
 
-	if (!DBM::is_result($item) || count($item) == 0) {
+	if (!DBM::is_result($item)) {
 		throw new BadRequestException("Invalid item.");
 	}
 
 	switch ($action) {
 		case "create":
-			$item[0]['starred'] = 1;
+			$item['starred'] = 1;
 			break;
 		case "destroy":
-			$item[0]['starred'] = 0;
+			$item['starred'] = 0;
 			break;
 		default:
 			throw new BadRequestException("Invalid action ".$action);
 	}
 
-	$r = Item::update(['starred' => $item[0]['starred']], ['id' => $itemid]);
+	$r = Item::update(['starred' => $item['starred']], ['id' => $itemid]);
 
 	if ($r === false) {
 		throw new InternalServerErrorException("DB error");
@@ -2434,7 +2323,7 @@ function api_favorites_create_destroy($type)
 
 
 	$user_info = api_get_user($a);
-	$rets = api_format_items($item, $user_info, false, $type);
+	$rets = api_format_items([$item], $user_info, false, $type);
 	$ret = $rets[0];
 
 	$data = ['status' => $ret];
@@ -2478,8 +2367,6 @@ function api_favorites($type)
 	if ($user_info['self'] == 0) {
 		$ret = [];
 	} else {
-		$sql_extra = "";
-
 		// params
 		$since_id = (x($_REQUEST, 'since_id') ? $_REQUEST['since_id'] : 0);
 		$max_id = (x($_REQUEST, 'max_id') ? $_REQUEST['max_id'] : 0);
@@ -2491,26 +2378,19 @@ function api_favorites($type)
 
 		$start = $page*$count;
 
+		$condition = ["`uid` = ? AND `verb` = ? AND `id` > ? AND `starred`",
+			api_user(), ACTIVITY_POST, $since_id];
+
+		$params = ['order' => ['id' => true], 'limit' => [$start, $count]];
+
 		if ($max_id > 0) {
-			$sql_extra .= ' AND `item`.`id` <= ' . intval($max_id);
-		}
-
-		$r = q("SELECT `item`.* FROM `item`
-			STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
-				AND (NOT `contact`.`blocked` OR `contact`.`pending`)
-			WHERE `item`.`uid` = %d
-			AND `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
-			AND `item`.`starred`
-			$sql_extra
-			AND `item`.`id`>%d
-			ORDER BY `item`.`id` DESC LIMIT %d ,%d",
-			intval(api_user()),
-			intval($since_id),
-			intval($start),
-			intval($count)
-		);
+			$condition[0] .= " AND `item`.`id` <= ?";
+			$condition[] = $max_id;
+		}
+
+		$statuses = Item::select(api_user(), [], $condition, $params);
 
-		$ret = api_format_items($r, $user_info, false, $type);
+		$ret = api_format_items(dba::inArray($statuses), $user_info, false, $type);
 	}
 
 	$data = ['status' => $ret];
@@ -3300,32 +3180,23 @@ function api_lists_statuses($type)
 
 	$start = $page * $count;
 
-	$sql_extra = '';
-	if ($max_id > 0) {
-		$sql_extra .= ' AND `item`.`id` <= ' . intval($max_id);
-	}
-	if ($exclude_replies > 0) {
-		$sql_extra .= ' AND `item`.`parent` = `item`.`id`';
-	}
-	if ($conversation_id > 0) {
-		$sql_extra .= ' AND `item`.`parent` = ' . intval($conversation_id);
-	}
+        $condition = ["`uid` = ? AND `verb` = ? AND `id` > ? AND `group_member`.`gid` = ?",
+		api_user(), ACTIVITY_POST, $since_id, $_REQUEST['list_id']];
 
-	$statuses = dba::p("SELECT `item`.* FROM `item`
-		STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
-			AND (NOT `contact`.`blocked` OR `contact`.`pending`)
-		STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = `item`.`contact-id`
-		WHERE `item`.`uid` = ? AND `verb` = ?
-		AND `item`.`visible` AND NOT `item`.`moderated` AND NOT `item`.`deleted`
-		$sql_extra
-		AND `item`.`id`>?
-		AND `group_member`.`gid` = ?
-		ORDER BY `item`.`id` DESC LIMIT ".intval($start)." ,".intval($count),
-		api_user(),
-		ACTIVITY_POST,
-		$since_id,
-		$_REQUEST['list_id']
-	);
+        if ($max_id > 0) {
+                $condition[0] .= " AND `item`.`id` <= ?";
+                $condition[] = $max_id;
+        }
+        if ($exclude_replies > 0) {
+                $condition[0] .= ' AND `item`.`parent` = `item`.`id`';
+        }
+        if ($conversation_id > 0) {
+                $condition[0] .= " AND `item`.`parent` = ?";
+                $condition[] = $conversation_id;
+        }
+
+	$params = ['order' => ['id' => true], 'limit' => [$start, $count]];
+	$statuses = Item::select(api_user(), [], $condition, $params);
 
 	$items = api_format_items(dba::inArray($statuses), $user_info, false, $type);
 
@@ -4847,19 +4718,13 @@ function prepare_photo_data($type, $scale, $photo_id)
 	$data['photo']['friendica_activities'] = api_format_items_activities($item[0], $type);
 
 	// retrieve comments on photo
-	$r = q("SELECT `item`.* FROM `item`
-		STRAIGHT_JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
-			AND (NOT `contact`.`blocked` OR `contact`.`pending`)
-		WHERE `item`.`parent` = %d AND `item`.`visible`
-		AND NOT `item`.`moderated` AND NOT `item`.`deleted`
-		AND `item`.`uid` = %d AND (`item`.`verb`='%s' OR `type`='photo')",
-		intval($item[0]['parent']),
-		intval(api_user()),
-		dbesc(ACTIVITY_POST)
-	);
+	$condition = ["`parent` = ? AND `uid` = ? AND (`verb` = ? OR `type`='photo')",
+		$item[0]['parent'], api_user(), ACTIVITY_POST];
+
+	$statuses = Item::select(api_user(), [], $condition);
 
 	// prepare output of comments
-	$commentData = api_format_items($r, $user_info, false, $type);
+	$commentData = api_format_items(dba::inArray($statuses), $user_info, false, $type);
 	$comments = [];
 	if ($type == "xml") {
 		$k = 0;
@@ -5849,14 +5714,10 @@ function api_friendica_notification_seen($type)
 	$nm->setSeen($note);
 	if ($note['otype']=='item') {
 		// would be really better with an ItemsManager and $im->getByID() :-P
-		$r = q(
-			"SELECT * FROM `item` WHERE `id`=%d AND `uid`=%d",
-			intval($note['iid']),
-			intval(local_user())
-		);
-		if ($r!==false) {
+		$item = Item::selectFirst(api_user(), [], ['id' => $note['iid'], 'uid' => api_user()]);
+		if (DBM::is_result($$item)) {
 			// we found the item, return it to the user
-			$ret = api_format_items($r, $user_info, false, $type);
+			$ret = api_format_items([$item], $user_info, false, $type);
 			$data = ['status' => $ret];
 			return api_format_data("status", $type, $data);
 		}
diff --git a/include/conversation.php b/include/conversation.php
index 6ce2004987..e63488df2d 100644
--- a/include/conversation.php
+++ b/include/conversation.php
@@ -467,8 +467,8 @@ function item_joins($uid = 0) {
 		AND NOT `contact`.`blocked`
 		AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 		OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
-		INNER JOIN `contact` AS `author` ON `author`.`id`=`item`.`author-id` AND NOT `author`.`blocked`
-		INNER JOIN `contact` AS `owner` ON `owner`.`id`=`item`.`owner-id` AND NOT `owner`.`blocked`
+		STRAIGHT_JOIN `contact` AS `author` ON `author`.`id`=`item`.`author-id` AND NOT `author`.`blocked`
+		STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id`=`item`.`owner-id` AND NOT `owner`.`blocked`
 		LEFT JOIN `user-item` ON `user-item`.`iid` = `item`.`id` AND `user-item`.`uid` = %d
 		LEFT JOIN `event` ON `event-id` = `event`.`id`",
 		CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid)
@@ -734,7 +734,7 @@ function conversation(App $a, $items, $mode, $update, $preview = false, $order =
 					'guid' => (($preview) ? 'Q0' : $item['guid']),
 					'network' => $item['item_network'],
 					'network_name' => ContactSelector::networkToName($item['item_network'], $profile_link),
-					'linktitle' => L10n::t('View %s\'s profile @ %s', $profile_name, ((strlen($item['author-link'])) ? $item['author-link'] : $item['url'])),
+					'linktitle' => L10n::t('View %s\'s profile @ %s', $profile_name, $item['author-link']),
 					'profile_url' => $profile_link,
 					'item_photo_menu' => item_photo_menu($item),
 					'name' => $profile_name_e,
diff --git a/include/enotify.php b/include/enotify.php
index 257c107207..d98465c6ec 100644
--- a/include/enotify.php
+++ b/include/enotify.php
@@ -129,7 +129,7 @@ function notification($params)
 		$item = null;
 
 		if ($params['otype'] === 'item' && $parent_id) {
-			$item = dba::selectFirst('item', [], ['id' => $parent_id]);
+			$item = Item::selectFirst($params['uid'], [], ['id' => $parent_id]);
 		}
 
 		$item_post_type = item_post_type($item);
@@ -739,7 +739,7 @@ function check_item_notification($itemid, $uid, $defaulttype = "") {
 
 	// Only act if it is a "real" post
 	// We need the additional check for the "local_profile" because of mixed situations on connector networks
-	$item = q("SELECT `id`, `mention`, `tag`,`parent`, `title`, `body`, `author-name`, `author-link`, `author-avatar`, `guid`,
+	$item = q("SELECT `id`, `mention`, `tag`,`parent`, `title`, `body`, `author-id`, `guid`,
 			`parent-uri`, `uri`, `contact-id`
 			FROM `item` WHERE `id` = %d AND `verb` IN ('%s', '') AND `type` != 'activity' AND
 				NOT (`author-link` IN ($profile_list))  LIMIT 1",
@@ -747,6 +747,8 @@ function check_item_notification($itemid, $uid, $defaulttype = "") {
 	if (!$item)
 		return false;
 
+	$author = dba::selectFirst('contact', ['name', 'thumb', 'url'], ['id' => $item[0]['author-id']]);
+
 	// Generate the notification array
 	$params = [];
 	$params["uid"] = $uid;
@@ -758,9 +760,9 @@ function check_item_notification($itemid, $uid, $defaulttype = "") {
 	$params["parent"] = $item[0]["parent"];
 	$params["link"] = System::baseUrl().'/display/'.urlencode($item[0]["guid"]);
 	$params["otype"] = 'item';
-	$params["source_name"] = $item[0]["author-name"];
-	$params["source_link"] = $item[0]["author-link"];
-	$params["source_photo"] = $item[0]["author-avatar"];
+	$params["source_name"] = $author["name"];
+	$params["source_link"] = $author["url"];
+	$params["source_photo"] = $author["thumb"];
 
 	if ($item[0]["parent-uri"] === $item[0]["uri"]) {
 		// Send a notification for every new post?
diff --git a/src/Model/Item.php b/src/Model/Item.php
index be6462eb62..1a468bfa11 100644
--- a/src/Model/Item.php
+++ b/src/Model/Item.php
@@ -33,38 +33,184 @@ require_once 'include/text.php';
 
 class Item extends BaseObject
 {
-	public static function select(array $fields = [], array $condition = [], $params = [], $uid = null)
+	public static function selectFirst($uid, array $fields = [], array $condition = [], $params = [])
 	{
-		require_once 'include/conversation.php';
+		$params['limit'] = 1;
+		$result = self::select($uid, $fields, $condition, $params);
 
-		$item_fields = ['id', 'guid'];
+		if (is_bool($result)) {
+			return $result;
+		} else {
+			$row = dba::fetch($result);
+			dba::close($result);
+			return $row;
+		}
+	}
+
+	public static function select($uid, array $selected = [], array $condition = [], $params = [])
+	{
+		$fields = self::fieldlist();
 
-		$select_fields = item_fieldlists();
+		$select_fields = self::constructSelectFields($fields, $selected);
 
 		$condition_string = dba::buildCondition($condition);
 
-		foreach ($item_fields as $field) {
-			$search = [" `" . $field . "`", "(`" . $field . "`"];
-			$replace = [" `item`.`" . $field . "`", "(`item`.`" . $field . "`"];
-			$condition_string = str_replace($search, $replace, $condition_string);
-		}
+		$condition_string = self::addTablesToFields($condition_string, $fields);
+
+		$condition_string = $condition_string . ' AND ' . self::condition();
+
+		$param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 
-		$condition_string = $condition_string . ' AND ' . item_condition();
+		$table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false);
 
-		if (!empty($uid)) {
-			$condition_string .= " AND `item`.`uid` = ?";
-			$condition['uid'] = $uid;
+		$sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
+
+		return dba::p($sql, $condition);
+	}
+
+	public static function selectFirstThread($uid, array $fields = [], array $condition = [], $params = [])
+	{
+		$params['limit'] = 1;
+		$result = self::selectThread($uid, $fields, $condition, $params);
+
+		if (is_bool($result)) {
+			return $result;
+		} else {
+			$row = dba::fetch($result);
+			dba::close($result);
+			return $row;
 		}
+	}
+
+	public static function selectThread($uid, array $selected = [], array $condition = [], $params = [])
+	{
+		$fields = self::fieldlist();
+
+		$threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
+			'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
+			'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
+			'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
+
+		$select_fields = self::constructSelectFields($fields, $selected);
+
+		$condition_string = dba::buildCondition($condition);
+
+		$condition_string = self::addTablesToFields($condition_string, $threadfields);
+		$condition_string = self::addTablesToFields($condition_string, $fields);
+
+		$condition_string = $condition_string . ' AND ' . self::condition();
 
 		$param_string = dba::buildParameter($params);
+		$param_string = self::addTablesToFields($param_string, $threadfields);
+		$param_string = self::addTablesToFields($param_string, $fields);
 
-		$table = "`item` " . item_joins($uid);
+		$table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true);
 
 		$sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
-echo $sql;
-		$result = dba::p($sql, $condition);
 
-		return dba::inArray($result);
+		return dba::p($sql, $condition);
+	}
+
+	private static function fieldlist()
+	{
+		$item_fields = ['author-id', 'owner-id', 'contact-id', 'uid', 'id', 'parent',
+			'uri', 'thr-parent', 'parent-uri', 'content-warning',
+			'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
+			'guid', 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'event-id',
+			'location', 'coord', 'app', 'attach', 'rendered-hash', 'rendered-html', 'object',
+			'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
+			'id' => 'item_id', 'network' => 'item_network'];
+
+		$author_fields = ['url' => 'author-link', 'name' => 'author-name', 'thumb' => 'author-avatar'];
+		$owner_fields = ['url' => 'owner-link', 'name' => 'owner-name', 'thumb' => 'owner-avatar'];
+		$contact_fields = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
+			'network', 'url', 'name', 'writable', 'self', 'id' => 'cid', 'alias'];
+
+		$event_fields = ['created' => 'event-created', 'edited' => 'event-edited',
+			'start' => 'event-start','finish' => 'event-finish',
+			'summary' => 'event-summary','desc' => 'event-desc',
+			'location' => 'event-location', 'type' => 'event-type',
+			'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
+			'ignore' => 'event-ignore', 'id' => 'event-id'];
+
+		return ['item' => $item_fields, 'author' => $author_fields, 'owner' => $owner_fields,
+			'contact' => $contact_fields, 'event' => $event_fields];
+	}
+
+	private static function condition()
+	{
+		return "`item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
+	}
+
+	private static function constructJoins($uid, $sql_commands, $thread_mode)
+	{
+		if ($thread_mode) {
+			$master_table = "`thread`";
+			$master_table_key = "`thread`.`iid`";
+			$joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
+		} else {
+			$master_table = "`item`";
+			$master_table_key = "`item`.`id`";
+			$joins = '';
+		}
+
+		$joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
+	                AND NOT `contact`.`blocked`
+	                AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
+	                OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
+	                STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
+	                STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
+	                LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
+	                CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
+
+		if (strpos($sql_commands, "`group_member`.") !== false) {
+			$joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
+		}
+
+		if (strpos($sql_commands, "`user`.") !== false) {
+			$joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
+		}
+
+		if (strpos($sql_commands, "`event`.") !== false) {
+			$joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
+		}
+
+		return $joins;
+	}
+
+	private static function constructSelectFields($fields, $selected)
+	{
+		$selection = [];
+		foreach ($fields as $table => $table_fields) {
+			foreach ($table_fields as $field => $select) {
+				if (empty($selected) || in_array($select, $selected)) {
+					if (is_int($field)) {
+						$selection[] = "`" . $table . "`.`".$select."`";
+					} else {
+						$selection[] = "`" . $table . "`.`" . $field . "` AS `".$select ."`";
+					}
+				}
+			}
+		}
+		return implode(", ", $selection);
+	}
+
+	private static function addTablesToFields($query, $fields)
+	{
+		foreach ($fields as $table => $table_fields) {
+			foreach ($table_fields as $alias => $field) {
+				if (is_int($alias)) {
+					$replace_field = $field;
+				} else {
+					$replace_field = $alias;
+				}
+
+				$search = "/([^\.])`" . $field . "`/i";
+				$replace = "$1`" . $table . "`.`" . $replace_field . "`";
+				$query = preg_replace($search, $replace, $query);
+			}
+		}
+		return $query;
 	}
 
 	/**