CREATE TABLE IF NOT EXISTS chat_messages (
	id_mex BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
	id_pair BIGINT NOT NULL,
	from_user BIGINT NOT NULL,
	to_user BIGINT NOT NULL,
	user_chat BIGINT NOT NULL,
	message TEXT NOT NULL,
	status INT(1) NOT NULL,
	`date` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
	`date2` TIMESTAMP NOT NULL,
	`date3` TIMESTAMP NOT NULL
);

$col = 'mysql:host=XXXXXXXXXXXXXXXXXX;dbname=XXXXXXXXXXXXXXXXXX';
$username = "XXXXXXXXXXXXXXXXXX";
$password = "XXXXXXXXXXXXXXXXXX";

server: "http://XXXXXXXXXXXXXXXXXX/chat.php",

{
	id: "number", //user's id
	name: "string", //user's name
	img: "data:image/*;base64", //user's image in base64
	phrase: "string", //user's personal phrase
	key: "string" //key for generate the encryption key
}

{
	"number": //user's id
	{
		id: "number", //user's id
		name: "string", //user's name
		available: true, //if user is available
		img: "data:image/*;base64", //user's image in base64
		phrase: "string", //user's personal phrase
		lat: float, //user's latitude (you have to use if "view" is set like "map")
		lon: float, //user's longitude (you have to use if "view" is set like "map")
		public_key: "string" //user's public key for crittography generate from "set_public_key" method
	},
	"number": { ....... },
	"number": { ....... },
	"number": { ....... },
	.......
}

updated_messages: function(messages, success){
	$.ajax({
		url: "http://localhost/savechat.php",
		method: "POST",
		data: {set: messages]},
		success: function(){
			success(messages);
		}
	});
}