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<?php /* Copyright (c) 2024 Freya Murphy */
class DatabaseQuery {
private $conn;
private $query;
private $where;
private $set;
private $param;
function __construct($conn) {
$this->conn = $conn;
$this->query = '';
$this->set = FALSE;
$this->where = FALSE;
$this->param = array();
}
///
/// ARBITRARY QUERY
///
public function query($query) {
$this->query .= $query;
return $this;
}
///
/// SELECT
///
public function select($select) {
$this->query .= "SELECT $select\n";
return $this;
}
public function from($from) {
$this->query .= "FROM $from\n";
return $this;
}
///
/// INSERT
///
public function insert_into($insert, ...$columns) {
$this->query .= "INSERT INTO $insert\n (";
foreach ($columns as $idx => $column) {
if ($idx !== 0) {
$this->query .= ",";
}
$this->query .= $column;
}
$this->query .= ")\n";
return $this;
}
public function values(...$values) {
$this->query .= "VALUES (";
foreach ($values as $idx => $value) {
if ($idx !== 0) {
$this->query .= ",";
}
$this->query .= "?";
array_push($this->param, $value);
}
$this->query .= ")\n";
return $this;
}
///
/// WHERE
///
public function where($cond) {
if (!$this->where) {
$this->where = TRUE;
$this->query .= "WHERE ";
} else {
$this->query .= "AND ";
}
$this->query .= "$cond ";
return $this;
}
public function where_in($column, $array) {
if (!$this->where) {
$this->where = TRUE;
$this->query .= "WHERE ";
} else {
$this->query .= "AND ";
}
if (empty($array)) {
$this->query .= "FALSE\n";
return $this;
}
$in = $this->in($array);
$this->query .= "$column $in\n";
return $this;
}
private function in($array) {
$in = 'IN (';
foreach ($array as $idx => $item) {
if ($idx != 0) {
$in .= ",";
}
$in .= "?";
array_push($this->param, $item);
}
$in .= ")";
return $in;
}
///
/// OPERATORS
///
public function like($item) {
$this->query .= "LIKE ?\n";
array_push($this->param, $item);
return $this;
}
public function eq($item) {
$this->query .= "= ?\n";
array_push($this->param, $item);
return $this;
}
public function ne($item) {
$this->query .= "<> ?\n";
array_push($this->param, $item);
return $this;
}
public function lt($item) {
$this->query .= "< ?\n";
array_push($this->param, $item);
return $this;
}
public function le($item) {
$this->query .= "<= ?\n";
array_push($this->param, $item);
return $this;
}
///
/// JOINS
///
public function join($table, $on, $type = 'LEFT') {
$this->query .= "$type JOIN $table ON $on\n";
return $this;
}
///
/// LIMIT, OFFSET, ORDER
///
public function limit($limit) {
$this->query .= "LIMIT ?\n";
array_push($this->param, $limit);
return $this;
}
public function offset($offset) {
$this->query .= "OFFSET ?\n";
array_push($this->param, $offset);
return $this;
}
public function order_by($column, $order = 'ASC') {
$this->query .= "ORDER BY " . $column . ' ' . $order . ' ';
return $this;
}
///
/// COLLECT
///
public function rows(...$params) {
$args = $this->param;
foreach ($params as $param) {
array_push($args, $param);
}
$stmt = $this->conn->prepare($this->query);
try {
$stmt->execute($args);
} catch (Exception $ex) {
echo $ex;
echo '<br> >> caused by <<<br>';
echo str_replace("\n", "<br>", $this->query);
}
return $stmt->fetchAll(PDO::FETCH_ASSOC);
}
public function row(...$params) {
$args = $this->param;
foreach ($params as $param) {
array_push($args, $param);
}
$stmt = $this->conn->prepare($this->query);
$stmt->execute($args);
return $stmt->fetch(PDO::FETCH_ASSOC);
}
public function execute(...$params) {
$args = $this->param;
foreach ($params as $param) {
array_push($args, $param);
}
$stmt = $this->conn->prepare($this->query);
try {
$stmt->execute($args);
return TRUE;
} catch (Exception $_e) {
echo $_e;
echo '<br> >> caused by <<<br>';
echo str_replace("\n", "<br>", $this->query);
return FALSE;
}
}
}
/**
* DatabaseHelper
* allows queries on the
* postgres database
*/
class DatabaseHelper {
private $conn;
function __construct() {
$this->conn = NULL;
}
private function connect() {
if ($this->conn === NULL) {
$user = getenv("POSTGRES_USER");
$pass = getenv("POSTGRES_PASSWORD");
$db = getenv("POSTGRES_DB");
$host = 'db';
$port = '5432';
$conn_str = sprintf("pgsql:host=%s;port=%d;dbname=%s;user=%s;password=%s",
$host,
$port,
$db,
$user,
$pass
);
$this->conn = new \PDO($conn_str);
$this->conn->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
}
return $this->conn;
}
public function select($select) {
$conn = $this->connect();
$query = new DatabaseQuery($conn);
return $query->select($select);
}
public function insert_into($insert, ...$columns) {
$conn = $this->connect();
$query = new DatabaseQuery($conn);
return $query->insert_into($insert, ...$columns);
}
public function query($query_str) {
$conn = $this->connect();
$query = new DatabaseQuery($conn);
return $query->query($query_str);
}
}
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