Как написать простую Социальную сеть

$response = array(            "success" => true,            "complete" => true,            "data" => $data        );echo json_encode($response);

function sendProfileMsg(text) {var data = {userid: anketaUserId,msg: text};data["token"] = token;$.post(sendProfileMsgUrl,data,function(data) {if (data.complete) {getAllProfileMsgs();}},"json");}

public function sendmsgAction() {        header('Access-Control-Allow-Origin: http://svlaboratory.org:8080');        $this->_helper->layout->disableLayout();        $this->_helper->viewRenderer->setNoRender(true);        $userId = $this->_getParam('userid');        $msg = $this->_getParam('msg');        $authHelper = new Ext_Controller_Action_Helper_Auth();                $token = $this->_getParam('token', null);        $ip = $_SERVER['REMOTE_ADDR'];        $myUserId = $authHelper->getUserId($token, $ip);                $response = array(            "success" => true,            "complete" => true        );        $modelChat = new Model_Chat();                $data = array(            "message" => $msg,            "user_id_from" => $myUserId,            "user_id_to" => $userId,        );                $modelChat->save($data);        $this->notificateUser($userId, $myUserId);        echo json_encode($response);    }

class Ext_Model{protected $_dbAdapter;        /**     *     * @var array     */    protected $_fields = array();    protected $_primaryKey = array();    /**     *     * @var Zend_Db_Table_Abstract     */    protected $_dbTable = null;    /**     *     * @var string     */    protected $_dbTableClass = null;    protected $_id=null;        public function getId()    {        return $this->_id;    }        public function setId($id)    {        $this->_id=$id;    }public function save($data)    {        $insertId = null;                $data = $this->_beforeSave($data);        // операции для сохранения записи        $cleanData = array();        $pk = array();        foreach ($this->_fields as $field) {            if (array_key_exists($field, $data)) {                $cleanData[$field] = $data[$field];            }        }        foreach ($this->_primaryKey as $field => $value) {            if (isset($cleanData[$value])) {                $pk[$value] = $cleanData[$value];            }        }        if (!empty($cleanData)) {            if (empty($pk)) {                $insertId = $this->insert($cleanData);                $data["id"] = $insertId;            } else {                $this->update($pk, $cleanData);            }        }               $this->_afterSave($data);        return $insertId;    }public function update($id, $data)    {        $data = $this->_beforeUpdate($data);        $where = "";        foreach ($this->_primaryKey as $key => $values) {            if ($key > 0 and $key <= count($this->_primaryKey)) {                $where .= ' and ';            }            $where .= "`$values`" . " = " . "$id[$values]";            unset($data[$values]);        }        $this->getDBTable()->update($data, $where);        $data=$id+$data;        $this->_afterUpdate($data);    }    public function insert($data)    {        $data = $this->_beforeInsert($data);        $this->getDBTable()->insert($data);        $this->setId($this->getDBTable()->getAdapter()->lastInsertId());        $this->_afterInsert($data);        return $this->getDBTable()->getAdapter()->lastInsertId();    }public function fetchRowManyWhere($conditions = array())    {        $select = $this->getDBTable()->select();        $this->_beforeFetch($select);        foreach ($conditions as $field => $value) {            $select->where("`$field` = ?", $value);        }        $row = $this->getDBTable()->fetchRow($select);        if (!$row) {            return array();        }        return $row->toArray();    }    public function fetchAllManyWhere($conditions = array(), $limit = null, $offset = null, $order = null)    {        $select = $this->getDBTable()->select();        $this->_beforeFetch($select);        foreach ($conditions as $field => $value) {            $select->where("`$field` = ?", $value);        }                if ($order !== null) {            $select->order($order);        }                if ($limit !== null || $offset !== null) {            $select->limit($limit, $offset);        }                $rows = $this->getDBTable()->fetchAll($select);        if (!$rows) {            return array();        }        return $rows->toArray();    }public function delete($id)    {        $id=$this->_beforeDelete($id);        $this->getDBTable()->delete("id = " . (int) $id);        $this->_afterDelete($id);    }    public function deleteByAttrib($att, $value)    {        $select = $this->getDBTable()->select();        $where = $this->getDBTable()->getAdapter()->quoteInto("`$att` = ?", $value);        $this->getDBTable()->delete($where);    }public function getDBTable()    {        if (!$this->_dbTable) {            if (!$this->_dbTableClass) {                throw new Ext_Model_Exception('DB table class is not set');            }            $this->_dbTable = new $this->_dbTableClass;        }        return $this->_dbTable;    }public function setDBTable(Zend_Db_Table_Abstract $table)    {        $this->_dbTable = $table;        return $this;    }        public function lastInsertId()    {        return $this->getDBTable()->getAdapter()->lastInsertId();    }        protected function _beforeFetch($select)    {     }        protected function _beforeSave($data)    {        return $data;    }    protected function _afterSave($data)    {        return $data;    }    protected function _beforeUpdate($data)    {        return $data;    }    protected function _afterUpdate($data)    {        return $data;    }    protected function _beforeInsert($data)    {        return $data;    }    protected function _afterInsert($data)    {        return $data;    }    protected function _beforeDelete($id)    {        return $id;    }    protected function _afterDelete($id)    {        return $id;    }}

class Model_DbTable_Chat extends Zend_Db_Table_Abstract{    protected $_name = 'chat';}

class Model_Chat extends Ext_Model{    protected $_dbTableClass = 'Model_DbTable_Chat';    protected $_fields = array('id',        'message',        'description',        'user_id_from',        'user_id_to','date',    );    protected $_primaryKey = array('id');        protected function _beforeInsert($data)    {        $data['date'] = date("Y-m-d H:i:s", time());        return $data;    }        public function fetchAllMsg($iser_id1, $iser_id2)    {        $select = $this->getDBTable()->select();        $this->_beforeFetch($select);                $sql = "SELECT * FROM chatbotchat WHERE (user_id_from = :userid1 AND user_id_to = :userid2) OR (user_id_from = :userid2 AND user_id_to = :userid1) Order by date ASC";        $rows = $this->getDBTable()->getAdapter()->fetchAll($sql, array("userid1" => $iser_id1, "userid2" => $iser_id2));        if (!$rows) {            return array();        }        return $rows;    }        public function fetchReadAllMsg($iser_id1, $iser_id2)    {        $select = $this->getDBTable()->select();        $this->_beforeFetch($select);        $sql = "UPDATE chatbotchat SET is_read = 1 WHERE (user_id_from = :userid2 AND user_id_to = :userid1)";        $this->getDBTable()->getAdapter()->query($sql, array("userid1" => $iser_id1, "userid2" => $iser_id2));    }        public function fetchProfilesMsg($user_id)    {        $select = $this->getDBTable()->select();        $this->_beforeFetch($select);        $sql = "SELECT * FROM chatbotchat WHERE (user_id_from = :userid OR user_id_to = :userid) Order by date DESC";        $rows = $this->getDBTable()->getAdapter()->fetchAll($sql, array("userid" => $user_id));        if (!$rows) {            return array();        }        return $rows;    }}

-- ------------------------------------------------------- Table `svlab`.`user`-- -----------------------------------------------------CREATE  TABLE IF NOT EXISTS `svlab`.`user` (  `id` INT   AUTO_INCREMENT ,  `first_name` VARCHAR(45) DEFAULT NULL,  `last_name` VARCHAR(200) DEFAULT NULL,  `nickname` VARCHAR(200) DEFAULT NULL,  `gender` VARCHAR(200) DEFAULT NULL,  `birth_date` DATETIME DEFAULT NULL,  `avatar_url` VARCHAR(200) DEFAULT NULL,  `min_avatar_url` VARCHAR(200) DEFAULT NULL,  `email` VARCHAR(45) NOT NULL,  `password` VARCHAR(45) DEFAULT "12345",  `password_recover` VARCHAR(15) DEFAULT NULL,  `country` VARCHAR(200) DEFAULT NULL,  `region` VARCHAR(200) DEFAULT NULL,  `city` VARCHAR(200) DEFAULT NULL,  `postal_code` VARCHAR(200) DEFAULT NULL,  `street` VARCHAR(200) DEFAULT NULL,  `house_number` VARCHAR(200) DEFAULT NULL,  `add_address_info` VARCHAR(200) DEFAULT NULL,  `site` VARCHAR(200) DEFAULT NULL,  `about_me_info` TEXT DEFAULT NULL,  `registration_date` DATETIME NOT NULL,  `comment_rating` FLOAT DEFAULT 0,  `comment_rating_pos` FLOAT DEFAULT 0,  `comment_rating_neg` FLOAT DEFAULT 0,  `white_ips` TEXT,   `is_active` TINYINT(1) DEFAULT false,  PRIMARY KEY (`id`) ,  UNIQUE INDEX `user_id_unique` (`id` ASC) ,  UNIQUE INDEX `user_email_unique` (`email` ASC))ENGINE = InnoDB;

-- ------------------------------------------------------- Table `svlab`.`chat`-- -----------------------------------------------------CREATE  TABLE IF NOT EXISTS `svlab`.`chat` (  `id` INT NOT NULL AUTO_INCREMENT,  `message` TEXT,  `user_id_from` INT NOT NULL,  `user_id_to` INT NOT NULL,  `date` DATETIME,  `is_read` TINYINT(1) DEFAULT false,  PRIMARY KEY (`id`),  UNIQUE INDEX `chatbotchat_id_unique` (`id` ASC))ENGINE=MyISAM DEFAULT CHARSET=utf8;