function getNextPrevRecordKeys(&$data, $securityMode, &$next, &$prev)
{
global $conn;
$next = array();
$prev = array();
if (@$_SESSION[$this->sessionPrefix . "_noNextPrev"]) {
return;
}
$prevExpr = "";
$nextExpr = "";
$where_next = "";
$where_prev = "";
$order_next = "";
$order_prev = "";
$arrFieldForSort = array();
$arrHowFieldSort = array();
$query = GetQueryObject($this->tName);
$where = $_SESSION[$this->sessionPrefix . "_where"];
if (!strlen($where)) {
$where = SecuritySQL($securityMode);
}
$having = $_SESSION[$this->sessionPrefix . "_having"];
$orderindexes = GetTableData($this->tName, ".orderindexes", array());
$strOrderBy = GetTableData($this->tName, ".strOrderBy", '');
// calc indexes of the key fields
$keyIndexes = array();
$tKeys = GetTableKeys($this->tName);
foreach ($tKeys as $k) {
$ki = GetFieldIndex($k, $this->tName);
if ($ki) {
$keyIndexes[] = $ki;
}
}
if (!count($keyIndexes)) {
$_SESSION[$this->sessionPrefix . "_noNextPrev"] = 1;
return;
}
// get current ordering info
if (@$_SESSION[$this->sessionPrefix . "_arrFieldForSort"] && @$_SESSION[$this->sessionPrefix . "_arrHowFieldSort"]) {
$arrFieldForSort = $_SESSION[$this->sessionPrefix . "_arrFieldForSort"];
$arrHowFieldSort = $_SESSION[$this->sessionPrefix . "_arrHowFieldSort"];
} else {
// get default order
if (count($orderindexes)) {
for ($i = 0; $i < count($orderindexes); $i++) {
$arrFieldForSort[] = $orderindexes[$i][0];
$arrHowFieldSort[] = $orderindexes[$i][1];
}
} elseif ($strOrderBy != '') {
$_SESSION[$this->sessionPrefix . "_noNextPrev"] = 1;
return;
}
// add key fields
for ($i = 0; $i < count($keyIndexes); $i++) {
if (array_search($keyIndexes[$i], $arrFieldForSort) === false) {
$arrFieldForSort[] = $keyIndexes[$i];
$arrHowFieldSort[] = "ASC";
}
}
$_SESSION[$this->sessionPrefix . "_arrFieldForSort"] = $arrFieldForSort;
$_SESSION[$this->sessionPrefix . "_arrHowFieldSort"] = $arrHowFieldSort;
}
if (!count($arrFieldForSort)) {
$_SESSION[$this->sessionPrefix . "_noNextPrev"] = 1;
return;
}
// make next & prev ORDER BY strings
for ($i = 0; $i < count($arrFieldForSort); $i++) {
if (!GetFieldByIndex($arrFieldForSort[$i], $this->tName)) {
continue;
}
if ($order_next == "") {
$order_next = " ORDER BY ";
$order_prev = " ORDER BY ";
} else {
$order_next .= ",";
$order_prev .= ",";
}
$order_next .= $arrFieldForSort[$i] . " " . $arrHowFieldSort[$i];
$order_prev .= $arrFieldForSort[$i] . " " . ($arrHowFieldSort[$i] == "DESC" ? "ASC" : "DESC");
}
// make next & prev where expressions
$tail = "";
for ($i = 0; $i < count($arrFieldForSort); $i++) {
$fieldName = GetFieldByIndex($arrFieldForSort[$i], $this->tName);
if (!$fieldName) {
continue;
}
if (!$query->HasGroupBy()) {
$fullName = GetFullFieldName($fieldName, $this->tName);
} else {
$fullName = $fieldName;
}
$asc = $arrHowFieldSort[$i] == "ASC";
if (!is_null($data[$fieldName])) {
// current field value is not null
$value = make_db_value($fieldName, $data[$fieldName], "", "", $this->tName);
$nextop = $asc ? ">" : "<";
$prevop = $asc ? "<" : ">";
$nextExpr = $fullName . $nextop . $value;
$prevExpr = $fullName . $prevop . $value;
if ($nextop == "<") {
$nextExpr .= " or " . $fullName . " IS NULL";
} else {
$prevExpr .= " or " . $fullName . " IS NULL";
}
if ($i < count($arrFieldForSort) - 1) {
$nextExpr .= " or " . $fullName . "=" . $value;
$prevExpr .= " or " . $fullName . "=" . $value;
}
} else {
// current field value is null
if ($asc) {
$nextExpr = $fullName . " IS NOT NULL";
} else {
$prevExpr = $fullName . " IS NOT NULL";
}
if ($i < count($arrFieldForSort) - 1) {
if ($nextExpr != "") {
$nextExpr .= " or ";
}
$nextExpr .= $fullName . " IS NULL";
if ($prevExpr != "") {
$prevExpr .= " or ";
}
$prevExpr .= $fullName . " IS NULL";
}
}
if ($nextExpr == "") {
$nextExpr = " 1=0 ";
}
if ($prevExpr == "") {
$prevExpr = " 1=0 ";
}
// append expression to where clause
if ($i > 0) {
$where_next .= " AND ";
$where_prev .= " AND ";
}
$where_next .= "(" . $nextExpr;
$where_prev .= "(" . $prevExpr;
$tail .= ")";
}
$where_next = $where_next . $tail;
$where_prev = $where_prev . $tail;
if ($where_next == "" or $order_next == "" or $where_prev == "" or $order_prev == "") {
$_SESSION[$this->sessionPrefix . "_noNextPrev"] = 1;
return;
}
// make the resulting query
if ($query === null) {
return;
}
if (!$query->HasGroupBy()) {
$oWhere = $query->Where();
$where = whereAdd($where, $oWhere->toSql($query));
$where_next = whereAdd($where_next, $where);
$where_prev = whereAdd($where_prev, $where);
$query->ReplaceFieldsWithDummies(GetBinaryFieldsIndices($this->tName));
$sql_next = $query->toSql($where_next, $order_next);
$sql_prev = $query->toSql($where_prev, $order_prev);
} else {
$oWhere = $query->Where();
$oHaving = $query->Having();
$where = whereAdd($where, $oWhere->toSql($query));
$having = whereAdd($having, $oHaving->toSql($query));
$query->ReplaceFieldsWithDummies(GetBinaryFieldsIndices($this->tName));
$sql = "select * from (" . $query->toSql($where, "", $having) . ") prevnextquery";
$sql_next = $sql . " WHERE " . $where_next . $order_next;
$sql_prev = $sql . " WHERE " . $where_prev . $order_prev;
}
// add record count options
$sql_next = AddTop($sql_next, 1);
$sql_prev = AddTop($sql_prev, 1);
$res_next = db_query($sql_next, $conn);
if ($res_next) {
if ($row_next = db_fetch_array($res_next)) {
foreach ($tKeys as $i => $k) {
$next[$i + 1] = $row_next[$k];
}
}
db_closequery($res_next);
}
$res_prev = db_query($sql_prev, $conn);
if ($row_prev = db_fetch_array($res_prev)) {
foreach ($tKeys as $i => $k) {
$prev[$i + 1] = $row_prev[$k];
}
}
db_closequery($res_prev);
}
/**
* Builde order params
*/
function buildOrderParams()
{
//orderlinkattrs for fields
$this->orderLinksAttr();
$order_ind = -1;
//Array fields for sort
$this->arrFieldForSort = array();
//Array how fields sort
$this->arrHowFieldSort = array();
$arrImplicitSortFields = array();
$key = array();
//Session field for sort
if (@$_SESSION[$this->sessionPrefix . "_arrFieldForSort"]) {
$this->arrFieldForSort = $_SESSION[$this->sessionPrefix . "_arrFieldForSort"];
}
//Session how field sort
if (@$_SESSION[$this->sessionPrefix . "_arrHowFieldSort"]) {
$this->arrHowFieldSort = $_SESSION[$this->sessionPrefix . "_arrHowFieldSort"];
}
//Session key fields for sort
if (@$_SESSION[$this->sessionPrefix . "_key"]) {
$key = $_SESSION[$this->sessionPrefix . "_key"];
} else {
$tKeys = GetTableKeys($this->tName);
for ($i = 0; $i < count($tKeys); $i++) {
if (GetFieldIndex($tKeys[$i])) {
$key[] = GetFieldIndex($tKeys[$i]);
}
}
$_SESSION[$this->sessionPrefix . "_key"] = $key;
}
$lenkey = count($key);
if (!isset($_SESSION[$this->sessionPrefix . "_order"])) {
$this->arrFieldForSort = array();
$this->arrHowFieldSort = array();
if (count($this->gOrderIndexes)) {
for ($i = 0; $i < count($this->gOrderIndexes); $i++) {
$this->arrFieldForSort[] = $this->gOrderIndexes[$i][0];
$this->arrHowFieldSort[] = $this->gOrderIndexes[$i][1];
}
} elseif ($this->gstrOrderBy != '') {
$_SESSION[$this->sessionPrefix . "_noNextPrev"] = 1;
}
//add sorting on key fields
if (count($key) && $this->moveNext) {
for ($i = 0; $i < $lenkey; $i++) {
$idsearch = array_search($key[$i], $this->arrFieldForSort);
if ($idsearch === false) {
$this->arrFieldForSort[] = $key[$i];
$this->arrHowFieldSort[] = "ASC";
$arrImplicitSortFields[] = $key[$i];
}
}
}
}
$lenArr = count($this->arrFieldForSort);
//Sorting defined on the sheet
if (@$_SESSION[$this->sessionPrefix . "_orderby"]) {
$order_field = GetFieldByGoodFieldName(substr($_SESSION[$this->sessionPrefix . "_orderby"], 1));
$order_dir = substr($_SESSION[$this->sessionPrefix . "_orderby"], 0, 1);
$order_ind = GetFieldIndex($order_field);
if ($order_ind) {
if (!@$_REQUEST["a"] and !@$_REQUEST["goto"] and !@$_REQUEST["pagesize"]) {
if (@$_REQUEST["ctrl"]) {
$idsearch = array_search($order_ind, $this->arrFieldForSort);
if ($idsearch === false) {
if ($order_dir == "a") {
$this->arrFieldForSort[] = $order_ind;
$this->arrHowFieldSort[] = "ASC";
} else {
$this->arrFieldForSort[] = $order_ind;
$this->arrHowFieldSort[] = "DESC";
}
} else {
$this->arrHowFieldSort[$idsearch] = $order_dir == "a" ? "ASC" : "DESC";
}
} else {
$this->arrFieldForSort = array();
$this->arrHowFieldSort = array();
if (!empty($_SESSION[$this->sessionPrefix . "_orderNo"])) {
unset($_SESSION[$this->sessionPrefix . "_orderNo"]);
}
$_SESSION[$this->sessionPrefix . "_noNextPrev"] = 0;
if ($order_dir == "a") {
$this->arrFieldForSort[] = $order_ind;
$this->arrHowFieldSort[] = "ASC";
} else {
$this->arrFieldForSort[] = $order_ind;
$this->arrHowFieldSort[] = "DESC";
}
}
}
}
}
$lenArr = count($this->arrFieldForSort);
//Draw pictures of fields for sorting
$condition = true;
if (!count($this->arrFieldForSort)) {
$condition = false;
} elseif (!$this->arrFieldForSort[0]) {
$condition = false;
}
if ($condition) {
for ($i = 0; $i < $lenArr; $i++) {
$order_field = GetFieldByIndex($this->arrFieldForSort[$i]);
$order_dir = $this->arrHowFieldSort[$i] == "ASC" ? "a" : "d";
$idsearch = array_search($this->arrFieldForSort[$i], $arrImplicitSortFields);
if ($idsearch === false) {
$this->xt->assign_section(GoodFieldName($order_field) . "_fieldheader", "", "<img " . ($this->is508 == true ? "alt=\" \" " : "") . "src=\"images/" . ($order_dir == "a" ? "up" : "down") . ".gif\" border=0>");
}
// default ASC for key fields
if ($idsearch !== false && in_array(GetFieldIndex($order_field), $arrImplicitSortFields)) {
$orderlinkattrs = $this->setLinksAttr(GoodFieldName($order_field));
} else {
$orderlinkattrs = $this->setLinksAttr(GoodFieldName($order_field), $order_dir);
}
$this->xt->assign(GoodFieldName($order_field) . "_orderlinkattrs", $orderlinkattrs);
}
}
//Shape sorting line for a request
if ($lenArr > 0) {
for ($i = 0; $i < $lenArr; $i++) {
$this->strOrderBy .= GetFieldByIndex($this->arrFieldForSort[$i]) ? ($this->strOrderBy != "" ? ", " : " ORDER BY ") . $this->arrFieldForSort[$i] . " " . $this->arrHowFieldSort[$i] : "";
}
}
if ($_SESSION[$this->sessionPrefix . "_noNextPrev"] == 1) {
$this->strOrderBy = $this->gstrOrderBy;
}
}