109 lines
3.7 KiB
PHP
109 lines
3.7 KiB
PHP
<?php
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namespace database;
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abstract class CommonDatabase {
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abstract public function query(string $sql, ...$args);
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abstract public function escape(string $s): string;
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abstract public function fetch($q): ?array;
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abstract public function fetchAll($q): ?array;
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abstract public function fetchRow($q): ?array;
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abstract public function result($q, int $field = 0);
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abstract public function insertId(): ?int;
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abstract public function numRows($q): ?int;
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protected function prepareQuery(string $sql, ...$args): string {
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global $config;
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if (!empty($args)) {
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$mark_count = substr_count($sql, '?');
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$positions = array();
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$last_pos = -1;
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for ($i = 0; $i < $mark_count; $i++) {
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$last_pos = strpos($sql, '?', $last_pos + 1);
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$positions[] = $last_pos;
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}
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for ($i = $mark_count - 1; $i >= 0; $i--) {
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$arg_val = $args[$i];
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if (is_null($arg_val)) {
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$v = 'NULL';
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} else {
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$v = '\''.$this->escape($arg_val) . '\'';
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}
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$sql = substr_replace($sql, $v, $positions[$i], 1);
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}
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}
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if (!empty($config['db']['log']))
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logDebug(__METHOD__.': ', $sql);
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return $sql;
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}
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public function insert(string $table, array $fields) {
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return $this->performInsert('INSERT', $table, $fields);
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}
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public function replace(string $table, array $fields) {
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return $this->performInsert('REPLACE', $table, $fields);
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}
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protected function performInsert(string $command, string $table, array $fields) {
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$names = [];
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$values = [];
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$count = 0;
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foreach ($fields as $k => $v) {
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$names[] = $k;
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$values[] = $v;
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$count++;
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}
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$sql = "{$command} INTO `{$table}` (`" . implode('`, `', $names) . "`) VALUES (" . implode(', ', array_fill(0, $count, '?')) . ")";
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array_unshift($values, $sql);
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return $this->query(...$values);
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}
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public function update(string $table, array $rows, ...$cond) {
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$fields = [];
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$args = [];
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foreach ($rows as $row_name => $row_value) {
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$fields[] = "`{$row_name}`=?";
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$args[] = $row_value;
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}
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$sql = "UPDATE `$table` SET ".implode(', ', $fields);
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if (!empty($cond)) {
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$sql .= " WHERE ".$cond[0];
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if (count($cond) > 1)
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$args = array_merge($args, array_slice($cond, 1));
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}
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return $this->query($sql, ...$args);
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}
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public function multipleInsert(string $table, array $rows) {
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list($names, $values) = $this->getMultipleInsertValues($rows);
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$sql = "INSERT INTO `{$table}` (`".implode('`, `', $names)."`) VALUES ".$values;
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return $this->query($sql);
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}
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public function multipleReplace(string $table, array $rows) {
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list($names, $values) = $this->getMultipleInsertValues($rows);
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$sql = "REPLACE INTO `{$table}` (`".implode('`, `', $names)."`) VALUES ".$values;
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return $this->query($sql);
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}
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protected function getMultipleInsertValues(array $rows): array {
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$names = [];
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$sql_rows = [];
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foreach ($rows as $i => $fields) {
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$row_values = [];
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foreach ($fields as $field_name => $field_val) {
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if ($i == 0) {
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$names[] = $field_name;
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}
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$row_values[] = $this->escape($field_val);
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}
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$sql_rows[] = "('".implode("', '", $row_values)."')";
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}
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return [$names, implode(', ', $sql_rows)];
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}
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} |