[5341] | 1 | <?php |
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| 2 | |
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| 3 | class PostgreSQL implements Service |
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| 4 | { |
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| 5 | private $con; //Conexão com o banco de dados |
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| 6 | private $config; //Configuração |
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| 7 | public $error = false; //Armazena um erro caso ocorra |
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| 8 | |
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| 9 | public function find ( $uri, $justthese = false, $criteria = false ){ |
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| 10 | |
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| 11 | $criteria = ($criteria !== false) ? $this->parseCriteria ( $criteria ) : ''; |
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| 12 | |
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| 13 | $justthese = $justthese ? '"'.implode('", "', $justthese).'"' : '*'; |
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| 14 | |
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| 15 | return $this->execResultSql( 'SELECT '.$justthese.' FROM '.$uri['concept'].' '.$criteria ); |
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| 16 | } |
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| 17 | |
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| 18 | public function read ( $uri, $justthese = false ){ |
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| 19 | |
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| 20 | $justthese = $justthese ? '"'.implode('", "', $justthese).'"' : '*'; |
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| 21 | |
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| 22 | return $this->execResultSql( 'SELECT '.$justthese.' FROM '.$uri['concept'].' WHERE id = \''.addslashes( $uri['id'] ).'\'', true ); |
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| 23 | } |
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| 24 | |
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| 25 | public function deleteAll ( $uri, $justthese = false, $criteria = false ){ |
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| 26 | if(!self::parseCriteria ( $criteria )) return false; //Validador para não apagar tabela inteira |
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| 27 | return $this->execSql( 'DELETE FROM '.$uri['concept'].' '.self::parseCriteria ( $criteria ) ); |
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| 28 | } |
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| 29 | |
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| 30 | public function delete ( $uri, $justthese = false ){ |
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| 31 | return $this->execSql('DELETE FROM '.$uri['concept'].' WHERE id = '.addslashes($uri['id'])); |
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| 32 | } |
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| 33 | |
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| 34 | public function replace ( $uri, $data, $criteria = false ){ |
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| 35 | return $this->execSql('UPDATE '.$uri['concept'].' '. self::parseUpdateData( $data ).' '.self::parseCriteria($criteria)); |
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| 36 | } |
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| 37 | |
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| 38 | public function update ( $uri, $data ){ |
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| 39 | return $this->execSql('UPDATE '.$uri['concept'].' '. self::parseUpdateData( $data ).' WHERE id = \''. addslashes( $uri['id']) .'\''); |
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| 40 | } |
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| 41 | |
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| 42 | public function create ( $uri, $data ){ |
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| 43 | return $this->execResultSql( 'INSERT INTO '.$uri['concept'].' '.self::parseInsertData( $data ), true ); |
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| 44 | } |
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| 45 | |
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| 46 | private function execSql( $sql ){ |
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| 47 | if(!$this->con) $this->open( $this->config ); |
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| 48 | |
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| 49 | $rs = pg_query( $this->con, $sql ); |
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| 50 | |
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| 51 | if ( !$rs ){ |
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| 52 | $this->error = pg_last_error ( $this->con ); |
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| 53 | return false; |
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| 54 | } |
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| 55 | |
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| 56 | return $rs; |
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| 57 | } |
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| 58 | |
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| 59 | public function execResultSql( $sql, $unique = false ){ |
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| 60 | $rs = $this->execSql( $sql ); |
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| 61 | |
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| 62 | if( $rs && $rs > 0 ) |
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| 63 | return self::parseSelectResult( $rs , $unique ); |
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| 64 | |
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| 65 | return $rs; |
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| 66 | } |
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| 67 | |
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| 68 | public function begin( $uri ) { |
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| 69 | |
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| 70 | if(!$this->con) |
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| 71 | $this->open( $this->config ); |
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| 72 | |
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| 73 | $this->error = false; |
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| 74 | pg_query($this->con, "BEGIN WORK"); |
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| 75 | } |
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| 76 | |
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| 77 | public function commit($uri ) { |
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| 78 | |
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| 79 | if( $this->error !== false ) |
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| 80 | { |
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| 81 | $error = $this->error; |
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| 82 | $this->error = false; |
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| 83 | |
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| 84 | throw new Exception( $error ); |
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| 85 | } |
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| 86 | |
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| 87 | pg_query($this->con, "COMMIT"); |
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| 88 | |
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| 89 | return( true ); |
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| 90 | } |
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| 91 | |
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| 92 | public function rollback( $uri ){ |
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| 93 | |
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| 94 | pg_query($this->con, "ROLLBACK"); |
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| 95 | } |
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| 96 | |
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| 97 | public function open ( $config ){ |
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| 98 | |
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| 99 | $this->config = $config; |
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| 100 | |
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| 101 | $rs = ''; |
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| 102 | $rs .= ( isset($this->config['host']) && $this->config['host'] ) ? ' host='.$this->config['host'] : '' ; |
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| 103 | $rs .= ( isset($this->config['user']) && $this->config['user'] ) ? ' user='.$this->config['user'] : '' ; |
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| 104 | $rs .= ( isset($this->config['password']) && $this->config['password'] ) ? ' password='.$this->config['password'] : '' ; |
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| 105 | $rs .= ( isset($this->config['dbname']) && $this->config['dbname'] ) ? ' dbname='.$this->config['dbname'] : '' ; |
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| 106 | $rs .= ( isset($this->config['port']) && $this->config['port'] ) ? ' port='.$this->config['port'] : '' ; |
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| 107 | |
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| 108 | return( $this->con = pg_connect( $rs ) ); |
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| 109 | //$this->con = pg_connect('host='.$config['host'].' user='.$config['user'].' password='.$config['password'].' dbname='.$config['dbname'].' options=\'--client_encoding=UTF8\''); |
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| 110 | } |
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| 111 | |
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| 112 | public function close(){ |
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| 113 | |
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| 114 | pg_close($this->con); |
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| 115 | |
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| 116 | $this->con = false; |
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| 117 | |
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| 118 | } |
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| 119 | |
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| 120 | public function setup(){} |
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| 121 | |
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| 122 | public function teardown(){} |
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| 123 | |
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| 124 | private static function parseInsertData( $data ){ |
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| 125 | |
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| 126 | $ind = array(); |
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| 127 | $val = array(); |
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| 128 | |
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| 129 | foreach ($data as $i => $v){ |
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| 130 | $ind[] = $i; |
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| 131 | $val[] = '\''.addslashes($v).'\''; |
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| 132 | } |
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| 133 | |
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| 134 | return '('.implode(',', $ind).') VALUES ('.implode(',', $val).') RETURNING id'; |
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| 135 | } |
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| 136 | |
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| 137 | private static function parseUpdateData( $data ){ |
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| 138 | |
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| 139 | $d = array(); |
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| 140 | |
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| 141 | foreach ($data as $i => $v) |
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| 142 | $d[] = $i.' = \''.addslashes ($v).'\''; |
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| 143 | |
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| 144 | return 'SET '.implode(',', $d); |
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| 145 | } |
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| 146 | |
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| 147 | private static function parseSelectResult( $result , $unique = false){ |
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| 148 | |
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| 149 | $return = array(); |
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| 150 | |
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| 151 | if (!$result) return false; |
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| 152 | if (pg_num_rows($result) === 0) return $return; |
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| 153 | else |
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| 154 | while( $row = pg_fetch_assoc( $result )) |
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| 155 | $return[] = $row; |
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| 156 | |
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| 157 | if($unique === true) return $return[0]; |
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| 158 | |
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| 159 | return $return; |
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| 160 | } |
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| 161 | |
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| 162 | private static function parseCriteria( $criteria ){ |
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| 163 | |
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| 164 | $result = ''; |
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| 165 | |
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| 166 | if( isset($criteria["filter"]) && $criteria["filter"] !== NULL ) |
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| 167 | { |
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| 168 | /* |
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| 169 | * ex: array ( |
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| 170 | * [0] 'OR', |
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| 171 | * [1] array( 'OR', array( array( '=', 'campo', 'valor' ) ), |
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| 172 | * [2] array( '=', 'campo' , 'valor' ), |
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| 173 | * [3] array( 'IN', 'campo', array( '1' , '2' , '3' ) ) |
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| 174 | * ) |
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| 175 | * OR |
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| 176 | * array( '=' , 'campo' , 'valor' ) |
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| 177 | */ |
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| 178 | |
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| 179 | $result .= 'WHERE '.self::parseFilter( $criteria['filter'] ); |
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| 180 | } |
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| 181 | /* |
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| 182 | * ex: array( 'table1' => 'table2' , 'table1' => 'table2') |
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| 183 | * |
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| 184 | */ |
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| 185 | if( isset($criteria["join"]) ) |
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| 186 | { |
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| 187 | foreach ($criteria["join"] as $i => $v) |
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| 188 | $result .= ' AND '.$i.' = '.$v.' '; |
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| 189 | } |
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| 190 | |
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| 191 | if( isset($criteria["group"]) ) |
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| 192 | { |
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| 193 | $result .= ' GROUP BY '.( is_array($criteria["group"]) ? implode(', ', $criteria["group"]) : $criteria["group"] ).' '; |
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| 194 | } |
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| 195 | |
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| 196 | if( isset($criteria["order"]) ) |
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| 197 | { |
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| 198 | $result .= ' ORDER BY '.( is_array($criteria["order"]) ? implode(', ', $criteria["order"]) : $criteria["order"] ).' '; |
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| 199 | } |
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| 200 | if( isset($criteria["limit"]) ) |
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| 201 | { |
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| 202 | $result .= ' LIMIT '. $criteria["limit"] .' '; |
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| 203 | } |
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| 204 | if( isset($criteria["offset"]) ) |
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| 205 | { |
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| 206 | $result .= ' OFFSET '. $criteria["offset"] .' '; |
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| 207 | } |
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| 208 | |
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| 209 | return $result; |
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| 210 | } |
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| 211 | |
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| 212 | private static function parseFilter( $filter ){ |
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| 213 | |
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| 214 | if( !is_array( $filter ) || count($filter) <= 0) return null; |
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| 215 | |
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| 216 | $op = self::parseOperator( array_shift( $filter ) ); |
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| 217 | |
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| 218 | if( is_array($filter[0]) ) |
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| 219 | { |
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| 220 | $nested = array(); |
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| 221 | |
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| 222 | foreach( $filter as $i => $f ) |
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| 223 | $nested[] = self::parseFilter( $f ); |
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| 224 | |
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| 225 | return( '('.implode( ' '.$op.' ', $nested ).')' ); |
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| 226 | } |
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| 227 | |
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| 228 | $igSuffix = $igPrefix = ''; |
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| 229 | |
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| 230 | if( strpos( $op[0], 'i' ) === 0 ) |
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| 231 | { |
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| 232 | $op[0] = substr( $op[0], 1 ); |
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| 233 | $filter[0] = 'upper("'.$filter[0].'")'; |
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| 234 | $igPrefix = 'upper('; |
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| 235 | $igSuffix = ')'; |
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| 236 | } |
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| 237 | |
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| 238 | if( is_array($filter[1]) ) |
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| 239 | return( $filter[0].' '.$op[0]." ($igPrefix'".implode( "'$igSuffix,$igPrefix'", array_map("addslashes" , $filter[1]) )."'$igSuffix)" ); |
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| 240 | |
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| 241 | return( $filter[0].' '.$op[0]." $igPrefix'".$op[1].addslashes( $filter[1] ).$op[2]."'$igSuffix" ); |
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| 242 | } |
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| 243 | |
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| 244 | private static function parseOperator( $op ){ |
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| 245 | |
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| 246 | switch(strtolower($op)) |
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| 247 | { |
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| 248 | case 'and': |
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| 249 | case 'or': return( $op ); |
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| 250 | case 'in': return array( $op ); |
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| 251 | case '^': return array( 'like', '%', '' ); |
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| 252 | case '$': return array( 'like', '', '%' ); |
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| 253 | case '*': return array( 'like', '%', '%' ); |
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| 254 | case 'i^': return array( 'ilike', '%', '' ); |
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| 255 | case 'i$': return array( 'ilike', '', '%' ); |
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| 256 | case 'i*': return array( 'ilike', '%', '%' ); |
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| 257 | default : return array( $op, '', '' ); |
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| 258 | } |
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| 259 | } |
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| 260 | |
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| 261 | } |
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| 262 | |
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| 263 | ?> |
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