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<?php
namespace Micropoly;
use InvalidArgumentException;
use Iterator;
use SQLite3;
use SQLite3Result;
class DbQuery
{
private string $query;
/** @var BoundVal[] */
private array $boundVals = [];
public function __construct(string $query)
{
$this->query = $query;
}
/**
* @param int|array $values
* @return string
*/
public static function valueListPlaceholders($values): string
{
if (is_array($values))
$num = count($values);
elseif (is_int($values))
$num = $values;
else
throw new InvalidArgumentException("\$values must be an int or an array");
return implode(",", array_fill(0, $num, "?"));
}
public static function insert(SQLite3 $db, string $table, array $fields, array $records)
{
if (empty($records) || empty($fields))
return;
$recordTemplate = "(" . implode(",", array_fill(0, count($fields), "?")) . ")";
$query = new self("INSERT INTO $table (" . implode(',', $fields) . ") VALUES " . implode(",", array_fill(0, count($records), $recordTemplate)));
$i = 1;
$fieldCount = count($fields);
foreach ($records as $record) {
if (count($record) !== $fieldCount)
throw new InvalidArgumentException("count of all record fields must match field count!");
foreach ($record as $v) {
$query->bind($i, $v);
$i++;
}
}
$query->exec($db);
}
public static function insertKV(SQLite3 $db, string $table, array $kv)
{
self::insert($db, $table, array_keys($kv), [array_values($kv)]);
}
/**
* @param mixed $where Name/Index of parameter
* @param BoundVal|mixed $val
* @return $this
*/
public function bind($where, $val): self
{
if (!($val instanceof BoundVal))
$val = new BoundVal($val, null);
$this->boundVals[$where] = $val;
return $this;
}
private function bindMulti(array $vals, $type, int $offset): self
{
foreach ($vals as $i => $v)
$this->bind($i + $offset, new BoundVal($v, $type));
return $this;
}
public function bindMultiAuto(array $vals, int $offset = 1): self { return $this->bindMulti($vals, null, $offset); }
public function bindMultiInt(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_INTEGER, $offset); }
public function bindMultiFloat(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_FLOAT, $offset); }
public function bindMultiText(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_TEXT, $offset); }
public function bindMultiBlob(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_BLOB, $offset); }
public function bindMultiNull(array $vals, int $offset = 1): self { return $this->bindMulti($vals, SQLITE3_NULL, $offset); }
/**
* @param SQLite3 $db
* @param callable|null $cb
* @return mixed Result of callback or null, if none given
* @throws DBError
*/
public function exec(SQLite3 $db, ?callable $cb = null)
{
$stmt = $db->prepare($this->query);
if ($stmt === false)
throw new DBError("Prepare failed", $this->query);
foreach ($this->boundVals as $where => $boundVal)
$boundVal->bind($stmt, $where);
$res = $stmt->execute();
if ($res === false) {
throw new DBError("execute failed", $this->query);
}
$out = $cb ? $cb($res) : null;
$res->finalize();
$stmt->close();
return $out;
}
public function fetchRow(SQLite3 $db, int $fetchMode = SQLITE3_NUM): ?array
{
return $this->exec($db, static function (SQLite3Result $res) use ($fetchMode) {
return $res->numColumns() ? $res->fetchArray($fetchMode) : null;
});
}
public function fetchRowAssoc(SQLite3 $db): ?array { return $this->fetchRow($db, SQLITE3_ASSOC); }
public function fetchRows(SQLite3 $db, int $fetchMode = SQLITE3_NUM): array
{
return $this->exec($db, static function (SQLite3Result $res) use ($fetchMode) {
if (!$res->numColumns())
return [];
$out = [];
while (($row = $res->fetchArray($fetchMode)))
$out[] = $row;
return $out;
});
}
public function fetchRowsAssoc(SQLite3 $db): array { return $this->fetchRows($db, SQLITE3_ASSOC); }
public function fetchIndexedRows(SQLite3 $db, ...$keys): array
{
return $this->exec($db, static function (SQLite3Result $res) use ($keys) {
if (!$res->numColumns())
return [];
$out = [];
while (($row = $res->fetchArray(SQLITE3_ASSOC))) {
$cursor =& $out;
foreach ($keys as $k)
$cursor =& $cursor[$row[$k]];
$cursor = $row;
}
return $out;
});
}
public function fetchIndexedValues(SQLite3 $db, $val, ...$keys): array
{
return array_map(fn ($row) => $row[$val] ?? null, $this->fetchIndexedRows($db, ...$keys));
}
public function fetchIndexedAllRows(SQLite3 $db, ...$keys): array
{
return $this->exec($db, static function (SQLite3Result $res) use ($keys) {
if (!$res->numColumns())
return [];
$out = [];
while (($row = $res->fetchArray(SQLITE3_ASSOC))) {
$cursor =& $out;
foreach ($keys as $k)
$cursor =& $cursor[$row[$k]];
$cursor[] = $row;
}
return $out;
});
}
public function fetchValues(SQLite3 $db): array
{
return array_map(fn ($row) => $row[0], $this->fetchRows($db));
}
}
|
