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modify WhereClause to hold off on evaluating parameters

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preparseQueryParams will now receive full WhereClause object and evaluate there
This commit is contained in:
Sergey Tsalkov
2013-06-02 15:46:46 -07:00
parent 1d61a11098
commit 65ec35c591
1 changed files with 45 additions and 29 deletions
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74
db.class.php
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@@ -372,7 +372,7 @@ class MeekroDB {
return $result;
}
public function preparseQueryParams() {
protected function preparseQueryParams() {
$args = func_get_args();
$sql = trim(strval(array_shift($args)));
$args_all = $args;
@@ -446,7 +446,16 @@ class MeekroDB {
}
if ($new_pos > 0) $chunkyQuery[] = substr($sql, 0, $new_pos);
if (is_object($arg) && ($arg instanceof WhereClause)) {
list($clause_sql, $clause_args) = $arg->textAndArgs();
array_unshift($clause_args, $clause_sql);
$preparsed_sql = call_user_func_array(array($this, 'preparseQueryParams'), $clause_args);
$chunkyQuery = array_merge($chunkyQuery, $preparsed_sql);
} else {
$chunkyQuery[] = array('type' => $type, 'value' => $arg);
}
$sql = substr($sql, $new_pos_back + $arg_number_length);
$pos_adj -= $new_pos_back + $arg_number_length;
}
@@ -456,9 +465,9 @@ class MeekroDB {
return $chunkyQuery;
}
public function escape($str) { return "'" . $this->get()->real_escape_string(strval($str)) . "'"; }
protected function escape($str) { return "'" . $this->get()->real_escape_string(strval($str)) . "'"; }
public function sanitize($value) {
protected function sanitize($value) {
if (is_object($value) && ($value instanceof MeekroDBEval)) return $value->text;
else if (is_null($value)) return 'NULL';
else if (is_bool($value)) return ($value ? 1 : 0);
@@ -482,7 +491,7 @@ class MeekroDB {
else return $this->escape($value);
}
public function parseQueryParams() {
protected function parseQueryParams() {
$args = func_get_args();
$chunkyQuery = call_user_func_array(array($this, 'preparseQueryParams'), $args);
@@ -736,27 +745,21 @@ class WhereClause {
public $type = 'and'; //AND or OR
public $negate = false;
public $clauses = array();
public $mdb = null;
function __construct($type, $mdb=null) {
function __construct($type) {
$type = strtolower($type);
if ($type != 'or' && $type != 'and') DB::nonSQLError('you must use either WhereClause(and) or WhereClause(or)');
if ($type !== 'or' && $type !== 'and') DB::nonSQLError('you must use either WhereClause(and) or WhereClause(or)');
$this->type = $type;
if ($mdb === null) $this->mdb = DB::getMDB();
else if ($mdb instanceof MeekroDB) $this->mdb = $mdb;
else DB::nonSQLError('the second argument to new WhereClause() must be an instance of class MeekroDB');
}
function add() {
$args = func_get_args();
if ($args[0] instanceof WhereClause) {
$this->clauses[] = $args[0];
return $args[0];
$sql = array_shift($args);
if ($sql instanceof WhereClause) {
$this->clauses[] = $sql;
} else {
$r = call_user_func_array(array($this->mdb, 'parseQueryParams'), $args);
$this->clauses[] = $r;
return $r;
$this->clauses[] = array('sql' => $sql, 'args' => $args);
}
}
@@ -767,7 +770,7 @@ class WhereClause {
if ($this->clauses[$i] instanceof WhereClause) {
$this->clauses[$i]->negate();
} else {
$this->clauses[$i] = 'NOT (' . $this->clauses[$i] . ')';
$this->clauses[$i]['sql'] = 'NOT (' . $this->clauses[$i]['sql'] . ')';
}
}
@@ -785,23 +788,36 @@ class WhereClause {
return count($this->clauses);
}
function text() {
if (count($this->clauses) == 0) return '(1)';
function textAndArgs() {
$sql = '';
$args = array();
$A = array();
if (count($this->clauses) == 0) return array('(1)', $args);
$sql = array();
foreach ($this->clauses as $clause) {
if ($clause instanceof WhereClause) $clause = $clause->text();
$A[] = '(' . $clause . ')';
if ($clause instanceof WhereClause) {
list($clause_sql, $clause_args) = $clause->textAndArgs();
} else {
$clause_sql = $clause['sql'];
$clause_args = $clause['args'];
}
$A = array_unique($A);
if ($this->type == 'and') $A = implode(' AND ', $A);
else $A = implode(' OR ', $A);
if ($this->negate) $A = '(NOT ' . $A . ')';
return $A;
$sql[] = "($clause_sql)";
$args = array_merge($args, $clause_args);
}
$sql = array_unique($sql);
if ($this->type == 'and') $sql = implode(' AND ', $sql);
else $sql = implode(' OR ', $sql);
if ($this->negate) $sql = '(NOT ' . $sql . ')';
return array($sql, $args);
}
// backwards compatability
// we now return full WhereClause object here and evaluate it in preparseQueryParams
function text() { return $this; }
function __toString() { return $this->text(); }
}