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<?php
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require_once "../lib/db_open.inc.php";
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require_once "./session_init.inc.php";
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$data = json_decode(file_get_contents("php://input"), true);
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$uid = (isset($data["uid"]) ? intval($data["uid"]) : 0);
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$set = (isset($data["set"]) && $data["set"] == "1" ? 1 : 0);
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$result_set = array(
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"return" => array(
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"code" => 0,
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"message" => "",
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"errorFields" => array(),
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)
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);
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header("Content-Type:application/json; charset=utf-8");
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// Validate input data
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if (!isset($_SESSION["BBS_uid"]) || $_SESSION["BBS_uid"] == 0)
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{
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$result_set["return"]["code"] = -1;
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$result_set["return"]["message"] = "没有登录";
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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if ($uid == $_SESSION["BBS_uid"])
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{
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$result_set["return"]["code"] = -1;
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$result_set["return"]["message"] = "不能对自己操作";
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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// Begin transaction
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$rs = mysqli_query($db_conn, "SET autocommit=0");
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if ($rs == false)
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{
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$result_set["return"]["code"] = -2;
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$result_set["return"]["message"] = "Mysqli error: " . mysqli_error($db_conn);
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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$rs = mysqli_query($db_conn, "BEGIN");
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if ($rs == false)
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{
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$result_set["return"]["code"] = -2;
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$result_set["return"]["message"] = "Mysqli error: " . mysqli_error($db_conn);
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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$sql = "SELECT UID FROM user_list WHERE UID = $uid AND enable";
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$rs = mysqli_query($db_conn, $sql);
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if ($rs == false)
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{
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$result_set["return"]["code"] = -2;
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$result_set["return"]["message"] = "Query user error: " . mysqli_error($db_conn);
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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if(mysqli_num_rows($rs) == 0)
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{
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$result_set["return"]["code"] = -1;
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$result_set["return"]["message"] = "用户不存在";
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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mysqli_free_result($rs);
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$sql = "SELECT ID FROM friend_list WHERE UID = " .
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$_SESSION["BBS_uid"] . " AND fUID = $uid FOR UPDATE";
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$rs = mysqli_query($db_conn, $sql);
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if ($rs == false)
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{
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$result_set["return"]["code"] = -2;
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$result_set["return"]["message"] = "Query friend error: " . mysqli_error($db_conn);
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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if ($row = mysqli_fetch_array($rs))
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{
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if ($set == 0)
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{
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$sql = "DELETE FROM friend_list WHERE ID = " . $row["ID"];
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$ret = mysqli_query($db_conn, $sql);
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if ($ret == false)
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{
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$result_set["return"]["code"] = -2;
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$result_set["return"]["message"] = "Delete friend error: " . mysqli_error($db_conn);
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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}
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else // $set == 1
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{
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$result_set["return"]["code"] = 1;
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$result_set["return"]["message"] = "已添加";
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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}
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else
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{
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if ($set == 1)
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{
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$sql = "INSERT INTO friend_list(UID, fUID) VALUES(".
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$_SESSION["BBS_uid"].", $uid)";
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$ret = mysqli_query($db_conn, $sql);
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if ($ret == false)
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{
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$result_set["return"]["code"] = -2;
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$result_set["return"]["message"] = "Add friend error: " . mysqli_error($db_conn);
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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}
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else // $set == 0
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{
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$result_set["return"]["code"] = 1;
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$result_set["return"]["message"] = "已删除";
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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}
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mysqli_free_result($rs);
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// Commit transaction
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$rs = mysqli_query($db_conn, "COMMIT");
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if ($rs == false)
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{
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$result_set["return"]["code"] = -2;
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$result_set["return"]["message"] = "Mysqli error: " . mysqli_error($db_conn);
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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}
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mysqli_close($db_conn);
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exit(json_encode($result_set));
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