/
DatabaseAnalyzer.class.php
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/
DatabaseAnalyzer.class.php
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<?php
require_once 'Constant.class.php';
class DatabaseAnalyzer {
protected $database_name = '';
/**
* Creates DatabaseAnalyzer for specific sqlite database.
*
* @param string $database_name
*/
public function __construct($database_name = '') {
$this->database_name = $database_name;
$this->database = new PDO('sqlite:'.$this->database_name);
$this->database->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
public function __destruct() {
$this->database = null;
}
public function get_tables() {
$result = $this->database->prepare("SELECT tbl_name FROM sqlite_master WHERE type = 'table' AND tbl_name NOT LIKE 'sqlite_%'");
$result->execute();
$tables = $result->fetchAll(PDO::FETCH_ASSOC);
return $tables;
}
public function get_columns($table_name) {
$result = $this->database->prepare("PRAGMA table_info(${table_name})");
$result->execute();
$columns = $result->fetchAll(PDO::FETCH_ASSOC);
return $columns;
}
public function table_exists($table_name) {
$result = $this->database->prepare("SELECT tbl_name FROM sqlite_master WHERE type = 'table' AND tbl_name NOT LIKE 'sqlite_%'");
$result->execute();
$tables = $result->fetchAll(PDO::FETCH_COLUMN, 0);
return in_array($table_name, $tables);
}
public function table_get_rows($table_name) {
if ($this->table_exists($table_name)) {
$result = $this->database->prepare("SELECT * FROM ${table_name}");
$result->execute();
$rows = $result->fetchAll(PDO::FETCH_ASSOC);
return $rows;
}
}
public function table_get_rows_filtered($table_name, $filter) {
return $this->table_query_filtered("SELECT * FROM ${table_name} WHERE", $table_name, $filter);
}
public function table_get_pk_column($table_name) {
if ($this->table_exists($table_name)) {
$pk_column = '';
$columns = $this->get_columns($table_name);
foreach ($columns as $column) {
if (1 == $column['pk']) {
$pk_column = $column['name'];
}
}
if ($pk_column === '') {
return FALSE;
} else {
return $pk_column;
}
}
}
public function table_get_entry($table_name, $id) {
if ($this->table_exists($table_name)) {
$pk_column = $this->table_get_pk_column($table_name);
if ($pk_column === FALSE) {
return array();
}
$result = $this->database->prepare("SELECT * FROM ${table_name} WHERE ${pk_column} = ?");
$result->execute(array($id));
$row = $result->fetch(PDO::FETCH_ASSOC);
return $row;
}
}
public function table_row_count($table_name) {
if ($this->table_exists($table_name)) {
$result = $this->database->prepare("SELECT COUNT(*) FROM ${table_name}");
$result->execute();
$count = $result->fetch(PDO::FETCH_COLUMN, 0);
return $count;
}
}
public function table_row_count_filtered($table_name, $filter) {
$count_array = $this->table_query_filtered("SELECT COUNT(*) AS count FROM ${table_name} WHERE", $table_name, $filter);
if ($count_array) {
return $count_array[0]['count'];
} else {
return 0;
}
}
public function table_query_filtered($base_query, $table_name, $filter) {
if ($this->table_exists($table_name)) {
$columns = $this->get_columns($table_name);
$column_names = array();
foreach ($columns as $column) {
$column_names[] = $column['name'];
}
$query = $base_query;
$filter_values = array();
foreach ($filter as $filter_column => $filter_value) {
if (!in_array($filter_column, $column_names)) {
// ignoring non existing columns
continue;
}
// first element does not need "AND"
if ($filter_value !== reset($filter)) {
$query .= " AND ";
}
$query .= " ${filter_column} = ? ";
$filter_values[] = $filter_value;
}
if (strpos($query, '?') === false) {
// if no valid filter value is given, nothing can be found
return array();
}
$result = $this->database->prepare($query);
$result->execute($filter_values);
return $result->fetchAll(PDO::FETCH_ASSOC);
}
}
private function get_table_pk_column($table_name) {
if ($this->table_exists($table_name)) {
$columns = $this->get_columns($table_name);
foreach ($columns as $column) {
if (1 == $column['pk']) {
return $column['name'];
}
}
}
}
public function entry_update($table_name, $new_values) {
$query = "";
if (!$this->table_exists($table_name)) {
return false;
}
$columns = $this->get_columns($table_name);
$pk_column = $this->get_table_pk_column($table_name);
if (!array_key_exists($pk_column, $new_values)) {
echo "ERROR: No primary key";
return;
}
$query = "UPDATE ${table_name} SET ";
$update_values = array();
foreach($columns as $column) {
$name = $column['name'];
if ($name === $pk_column) {
continue;
}
if (array_key_exists($name, $new_values)) {
$query .= "${name} = ?, ";
$update_values[] = DataConverter::odata2Database($column, $new_values[$name]);
} else {
continue;
}
}
$query = rtrim($query, ', ');
$query .= " WHERE ${pk_column} = ?";
$update_values[] = $new_values[$pk_column];
$result = $this->database->prepare($query);
$result->execute($update_values);
return true;
}
public function entry_create($table_name, $new_values) {
$query = "";
if (!$this->table_exists($table_name)) {
return false;
}
$columns = $this->get_columns($table_name);
$pk_column = $this->get_table_pk_column($table_name);
if (!array_key_exists($pk_column, $new_values)
|| strlen($new_values[$pk_column]) < 1) {
$new_values[$pk_column] = $this->table_get_next_key($table_name, $pk_column);
}
$insert_values = array();
$query = "INSERT INTO ${table_name} ( ";
foreach($columns as $column) {
$name = $column['name'];
if (array_key_exists($name, $new_values)) {
$query .= "${name}, ";
$insert_values[] = DataConverter::odata2Database($column, $new_values[$name]);
} else {
continue;
}
}
$query = rtrim($query, ', ');
$query .= " ) VALUES ( ";
foreach($columns as $column) {
$query .= "?, ";
}
$query = rtrim($query, ', ');
$query .= " )";
$result = $this->database->prepare($query);
$result->execute($insert_values);
return $new_values[$pk_column];
}
public function entry_delete($table_name, $id) {
if (!$this->table_exists($table_name)) {
return false;
}
$pk_column = $this->get_table_pk_column($table_name);
$result = $this->database->prepare("DELETE FROM ${table_name} WHERE ${pk_column} = ?");
$result->execute(array($id));
return true;
}
private function table_get_next_key($table_name, $pk_column) {
if ($this->table_exists($table_name)) {
$result = $this->database->prepare("SELECT MAX(${pk_column}) FROM ${table_name}");
$result->execute();
$count = $result->fetch(PDO::FETCH_COLUMN, 0);
return ($count + 1);
}
}
public function table_get_foreign_keys($table_name) {
if ($this->table_exists($table_name)) {
$result = $this->database->prepare("PRAGMA foreign_key_list(${table_name})");
$result->execute();
$foreign_keys = $result->fetchAll(PDO::FETCH_ASSOC);
return $foreign_keys;
}
}
public function table_get_relationships($table_name) {
if ($this->table_exists($table_name)) {
$relationships = array();
$tables = $this->get_tables();
foreach ($tables as $table) {
$foreign_keys = $this->table_get_foreign_keys($table['tbl_name']);
if ($table['tbl_name'] === $table_name) {
foreach ($foreign_keys as $foreign_key) {
$foreign_key['type'] = 'entry';
$relationships[] = $foreign_key;
}
continue;
}
foreach ($foreign_keys as $foreign_key) {
if ($foreign_key['table'] === $table_name) {
$relationships[] = array(
'table' => $table['tbl_name'],
'type' => 'feed'
);
}
}
}
return $relationships;
}
}
public function table_get_relationships_between($table_name, $related_table_name) {
$table_foreign_keys = $this->table_get_foreign_keys($table_name);
$related_table_foreign_keys = $this->table_get_foreign_keys($related_table_name);
$relationships = array();
foreach ($table_foreign_keys as $foreign_key) {
// if related table is part of a foreign key of table
/* Only 1:n is supported, foreign keys are always stored under the n-table
* thus follows that: table is n and related table is 1, the relationship
* from table to related table is of type entry
*/
if($foreign_key['table'] === $related_table_name) {
$relationships[$table_name] = array(
'fromTable' => $table_name,
'fromColumn' => $foreign_key['from'],
'toTable' => $related_table_name,
'toColumn' => $foreign_key['to'],
'name' => 'FK_'.$table_name.'_'.$related_table_name,
'type' => 'entry'
);
$relationships[$related_table_name] = array(
'fromTable' => $related_table_name,
'fromColumn' => $foreign_key['to'],
'toTable' => $table_name,
'toColumn' => $foreign_key['from'],
'name' => 'FK_'.$table_name.'_'.$related_table_name,
'type' => 'feed'
);
return $relationships;
}
}
foreach ($related_table_foreign_keys as $foreign_key) {
// opposite of above
if($foreign_key['table'] === $table_name) {
$relationships[$related_table_name] = array(
'fromTable' => $related_table_name,
'fromColumn' => $foreign_key['from'],
'toTable' => $table_name,
'toColumn' => $foreign_key['to'],
'name' => 'FK_'.$related_table_name.'_'.$table_name,
'type' => 'entry'
);
$relationships[$table_name] = array(
'fromTable' => $table_name,
'fromColumn' => $foreign_key['to'],
'toTable' => $related_table_name,
'toColumn' => $foreign_key['from'],
'name' => 'FK_'.$related_table_name.'_'.$table_name,
'type' => 'feed'
);
return $relationships;
}
}
return $relationships;
}
}
?>