diff --git a/src/Core/UserImport.php b/src/Core/UserImport.php
new file mode 100644
index 0000000000..9965bdc521
--- /dev/null
+++ b/src/Core/UserImport.php
@@ -0,0 +1,296 @@
+<?php
+/**
+ * @file src/Core/UserImport.php
+ */
+namespace Friendica\Core;
+
+use Friendica\App;
+use Friendica\Core\System;
+use Friendica\Core\PConfig;
+use Friendica\Core\Worker;
+use Friendica\Database\DBM;
+use Friendica\Model\Photo;
+use Friendica\Object\Image;
+use dba;
+
+require_once "include/dba.php";
+
+define("IMPORT_DEBUG", false);
+
+/**
+ * @brief UserImport class
+ */
+class UserImport
+{
+	function last_insert_id() {
+		if (IMPORT_DEBUG) {
+			return 1;
+		}
+	
+		return dba::lastInsertId();
+	}
+
+	/**
+	 * Remove columns from array $arr that aren't in table $table
+	 *
+	 * @param string $table Table name
+	 * @param array &$arr Column=>Value array from json (by ref)
+	 */
+	function check_cols($table, &$arr)
+	{
+		$query = sprintf("SHOW COLUMNS IN `%s`", dbesc($table));
+		logger("uimport: $query", LOGGER_DEBUG);
+		$r = q($query);
+		$tcols = array();
+		// get a plain array of column names
+		foreach ($r as $tcol) {
+			$tcols[] = $tcol['Field'];
+		}
+		// remove inexistent columns
+		foreach ($arr as $icol => $ival) {
+			if (!in_array($icol, $tcols)) {
+				unset($arr[$icol]);
+			}
+		}
+	}
+
+	/**
+	 * Import data into table $table
+	 *
+	 * @param string $table Table name
+	 * @param array $arr Column=>Value array from json
+	 */
+	function db_import_assoc($table, $arr)
+	{
+		if (isset($arr['id'])) {
+			unset($arr['id']);
+		}
+
+		check_cols($table, $arr);
+		$cols = implode("`,`", array_map('dbesc', array_keys($arr)));
+		$vals = implode("','", array_map('dbesc', array_values($arr)));
+		$query = "INSERT INTO `$table` (`$cols`) VALUES ('$vals')";
+		logger("uimport: $query", LOGGER_TRACE);
+
+		if (IMPORT_DEBUG) {
+			return true;
+		}
+
+		return q($query);
+	}
+
+	/**
+	 * @brief Import account file exported from mod/uexport
+	 *
+	 * @param App $a Friendica App Class
+	 * @param array $file array from $_FILES
+	 */
+	function import_account(App $a, $file) {
+		logger("Start user import from " . $file['tmp_name']);
+		/*
+		STEPS
+		1. checks
+		2. replace old baseurl with new baseurl
+		3. import data (look at user id and contacts id)
+		4. archive non-dfrn contacts
+		5. send message to dfrn contacts
+		*/
+
+		$account = json_decode(file_get_contents($file['tmp_name']), true);
+		if ($account === null) {
+			notice(t("Error decoding account file"));
+			return;
+		}
+
+
+		if (!x($account, 'version')) {
+			notice(t("Error! No version data in file! This is not a Friendica account file?"));
+			return;
+		}
+
+		// check for username
+		$r = q("SELECT uid FROM user WHERE nickname='%s'", $account['user']['nickname']);
+		if ($r === false) {
+			logger("uimport:check nickname : ERROR : " . dba::errorMessage(), LOGGER_NORMAL);
+			notice(t('Error! Cannot check nickname'));
+			return;
+		}
+		if (DBM::is_result($r) > 0) {
+			notice(sprintf(t("User '%s' already exists on this server!"), $account['user']['nickname']));
+			return;
+		}
+
+		// check if username matches deleted account
+		$r = q("SELECT id FROM userd WHERE username='%s'", $account['user']['nickname']);
+		if ($r === false) {
+			logger("uimport:check nickname : ERROR : " . dba::errorMessage(), LOGGER_NORMAL);
+			notice(t('Error! Cannot check nickname'));
+			return;
+		}
+		if (DBM::is_result($r) > 0) {
+			notice(sprintf(t("User '%s' already exists on this server!"), $account['user']['nickname']));
+			return;
+		}
+
+		$oldbaseurl = $account['baseurl'];
+		$newbaseurl = System::baseUrl();
+
+		$oldaddr = str_replace('http://', '@', normalise_link($oldbaseurl));
+		$newaddr = str_replace('http://', '@', normalise_link($newbaseurl));
+
+		if (!empty($account['profile']['addr'])) {
+			$old_handle = $account['profile']['addr'];
+		} else {
+			$old_handle = $account['user']['nickname'].$oldaddr;
+		}
+
+		$olduid = $account['user']['uid'];
+
+		unset($account['user']['uid']);
+		unset($account['user']['account_expired']);
+		unset($account['user']['account_expires_on']);
+		unset($account['user']['expire_notification_sent']);
+
+		foreach ($account['user'] as $k => &$v) {
+			$v = str_replace(array($oldbaseurl, $oldaddr), array($newbaseurl, $newaddr), $v);
+		}
+
+		// import user
+		$r = db_import_assoc('user', $account['user']);
+		if ($r === false) {
+			logger("uimport:insert user : ERROR : " . dba::errorMessage(), LOGGER_NORMAL);
+			notice(t("User creation error"));
+			return;
+		}
+		$newuid = last_insert_id();
+
+		PConfig::set($newuid, 'system', 'previous_addr', $old_handle);
+
+		// Generate a new guid for the account. Otherwise there will be problems with diaspora
+		q("UPDATE `user` SET `guid` = '%s' WHERE `uid` = %d",
+			dbesc(generate_user_guid()), intval($newuid));
+
+		foreach ($account['profile'] as &$profile) {
+			foreach ($profile as $k => &$v) {
+				$v = str_replace(array($oldbaseurl, $oldaddr), array($newbaseurl, $newaddr), $v);
+				foreach (array("profile", "avatar") as $k) {
+					$v = str_replace($oldbaseurl . "/photo/" . $k . "/" . $olduid . ".jpg", $newbaseurl . "/photo/" . $k . "/" . $newuid . ".jpg", $v);
+				}
+			}
+			$profile['uid'] = $newuid;
+			$r = db_import_assoc('profile', $profile);
+			if ($r === false) {
+				logger("uimport:insert profile " . $profile['profile-name'] . " : ERROR : " . dba::errorMessage(), LOGGER_NORMAL);
+				info(t("User profile creation error"));
+				dba::delete('user', array('uid' => $newuid));
+				return;
+			}
+		}
+
+		$errorcount = 0;
+		foreach ($account['contact'] as &$contact) {
+			if ($contact['uid'] == $olduid && $contact['self'] == '1') {
+				foreach ($contact as $k => &$v) {
+					$v = str_replace(array($oldbaseurl, $oldaddr), array($newbaseurl, $newaddr), $v);
+					foreach (array("profile", "avatar", "micro") as $k) {
+						$v = str_replace($oldbaseurl . "/photo/" . $k . "/" . $olduid . ".jpg", $newbaseurl . "/photo/" . $k . "/" . $newuid . ".jpg", $v);
+					}
+				}
+			}
+			if ($contact['uid'] == $olduid && $contact['self'] == '0') {
+				// set contacts 'avatar-date' to NULL_DATE to let worker to update urls
+				$contact["avatar-date"] = NULL_DATE;
+
+				switch ($contact['network']) {
+					case NETWORK_DFRN:
+					case NETWORK_DIASPORA:
+						//  send relocate message (below)
+						break;
+					case NETWORK_FEED:
+					case NETWORK_MAIL:
+						// Nothing to do
+						break;
+					default:
+						// archive other contacts
+						$contact['archive'] = "1";
+				}
+			}
+			$contact['uid'] = $newuid;
+			$r = db_import_assoc('contact', $contact);
+			if ($r === false) {
+				logger("uimport:insert contact " . $contact['nick'] . "," . $contact['network'] . " : ERROR : " . dba::errorMessage(), LOGGER_NORMAL);
+				$errorcount++;
+			} else {
+				$contact['newid'] = last_insert_id();
+			}
+		}
+		if ($errorcount > 0) {
+			notice(sprintf(tt("%d contact not imported", "%d contacts not imported", $errorcount), $errorcount));
+		}
+
+		foreach ($account['group'] as &$group) {
+			$group['uid'] = $newuid;
+			$r = db_import_assoc('group', $group);
+			if ($r === false) {
+				logger("uimport:insert group " . $group['name'] . " : ERROR : " . dba::errorMessage(), LOGGER_NORMAL);
+			} else {
+				$group['newid'] = last_insert_id();
+			}
+		}
+
+		foreach ($account['group_member'] as &$group_member) {
+			$import = 0;
+			foreach ($account['group'] as $group) {
+				if ($group['id'] == $group_member['gid'] && isset($group['newid'])) {
+					$group_member['gid'] = $group['newid'];
+					$import++;
+					break;
+				}
+			}
+			foreach ($account['contact'] as $contact) {
+				if ($contact['id'] == $group_member['contact-id'] && isset($contact['newid'])) {
+					$group_member['contact-id'] = $contact['newid'];
+					$import++;
+					break;
+				}
+			}
+			if ($import == 2) {
+				$r = db_import_assoc('group_member', $group_member);
+				if ($r === false) {
+					logger("uimport:insert group member " . $group_member['id'] . " : ERROR : " . dba::errorMessage(), LOGGER_NORMAL);
+				}
+			}
+		}
+
+		foreach ($account['photo'] as &$photo) {
+			$photo['uid'] = $newuid;
+			$photo['data'] = hex2bin($photo['data']);
+
+			$Image = new Image($photo['data'], $photo['type']);
+			$r = Photo::store(
+				$Image,
+				$photo['uid'], $photo['contact-id'], //0
+				$photo['resource-id'], $photo['filename'], $photo['album'], $photo['scale'], $photo['profile'], //1
+				$photo['allow_cid'], $photo['allow_gid'], $photo['deny_cid'], $photo['deny_gid']
+			);
+
+			if ($r === false) {
+				logger("uimport:insert photo " . $photo['resource-id'] . "," . $photo['scale'] . " : ERROR : " . dba::errorMessage(), LOGGER_NORMAL);
+			}
+		}
+
+		foreach ($account['pconfig'] as &$pconfig) {
+			$pconfig['uid'] = $newuid;
+			$r = db_import_assoc('pconfig', $pconfig);
+			if ($r === false) {
+				logger("uimport:insert pconfig " . $pconfig['id'] . " : ERROR : " . dba::errorMessage(), LOGGER_NORMAL);
+			}
+		}
+
+		// send relocate messages
+		Worker::add(PRIORITY_HIGH, 'Notifier', 'relocate', $newuid);
+
+		info(t("Done. You can now login with your username and password"));
+		goaway(System::baseUrl() . "/login");
+	}
+}