DatabaseHandler::__construct() - Code Metrics - Inspection of "Rearrange class instanse and variable declarations" - andela-tolotin/Potato-ORM - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — test ( dd676d...2ee69c )

by Temitope

created 2016-02-28 17:42 UTC

DatabaseHandler::__construct() A

↳ Parent: DatabaseHandler

Complexity

Conditions	2
Paths	2

Size

Total Lines	13
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Importance

Changes	7
Bugs	0	Features	3

Metric	Value
c	7
b	0
f	3
dl	0
loc	13
rs	9.4285
cc	2
eloc	6
nc	2
nop	2

<?php

/**
 * @package  Laztopaz\potato-ORM
 * @author   Temitope Olotin <[email protected]>
 * @license  <https://opensource.org/license/MIT> MIT
 */

namespace Laztopaz\potatoORM;

use PDO;
use Laztopaz\potatoORM\DatabaseHelper;
use Laztopaz\potatoORM\TableFieldUndefinedException;
use Laztopaz\potatoORM\EmptyArrayException;

class DatabaseHandler {

	private $tableFields;

	private $dbHelperInstance;

	private $dbConnection;
	private $model;

	/**
	 * This is a constructor; a default method  that will be called automatically during class instantiation
	 */
	public function __construct($modelClassName, $dbConn = Null)
	{
		if (is_null($dbConn)) {
			$this->dbConnection = new DatabaseConnection();
		} else {
			$this->dbConnection = $dbConn;
			$this->model = $modelClassName;
		}

		//$this->dbHelperInstance = new DatabaseHelper($this->dbConnection);


		//$this->tableFields = $this->dbHelperInstance->getColumnNames($modelClassName, $dbConn);

	}

	/**
	 * This method create a record and store it in a table row
	 * @params associative array, string tablename
	 * @return boolean true or false
	 */
	public function create($associative1DArray, $tableName, $dbConn = Null)
	{
		$unexpectedFields = self::checkIfMagicSetterContainsIsSameAsClassModel($this->getColumnNames($this->model, $this->dbConnection),$associative1DArray);


		if (count($unexpectedFields) > 0)
		{
			throw TableFieldUndefinedException::fieldsNotDefinedException($unexpectedFields,"needs to be created as table field");
		}

		unset($this->getColumnNames($this->model, $this->dbConnection)[0]);

		if (is_null($dbConn)) {
			$dbConn = $this->dbConnection;
		}

		$insertQuery = 'INSERT INTO '.$tableName;

		$TableValues = implode(',',array_keys($associative1DArray));

		foreach ($associative1DArray as $field => $value) {

			$FormValues[] = "'".trim(addslashes($value))."'";
foreach ($collection as $item) {
    $myArray['foo'] = $item->getFoo();

    if ($item->hasBar()) {
        $myArray['bar'] = $item->getBar();
    }

    // do something with $myArray
}
		}
		$splittedTableValues = implode(',', $FormValues);
function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}

		$insertQuery.= ' ('.$TableValues.')';

		$insertQuery.= ' VALUES ('.$splittedTableValues.')';

		$executeQuery = $dbConn->exec($insertQuery);

		return $executeQuery ? : false;
	}

	/*
	 * This method updates any table by supplying 3 parameter
	 * @params: $updateParams, $tableName, $associative1DArray
	 * @return boolean true or false
	 */
	public function update(array $updateParams, $tableName, $associative1DArray, $dbConn = Null)
	{
		$sql = "";

		if (is_null($dbConn)) {

			$dbConn = $this->dbConnection;
		}

		$updateSql = "UPDATE `$tableName` SET ";

		unset($associative1DArray['id']);

		$unexpectedFields = self::checkIfMagicSetterContainsIsSameAsClassModel($this->getColumnNames($this->model, $this->dbConnection),$associative1DArray);


		if (count($unexpectedFields) > 0) {

			throw TableFieldUndefinedException::fieldsNotDefinedException($unexpectedFields,"needs to be created as table field");
		}


		foreach($associative1DArray as $field => $value)
		{
			$sql .= "`$field` = '$value'".",";
		}

		$updateSql .= $this->prepareUpdateQuery($sql);

		foreach ($updateParams as $key => $val) {

			$updateSql .= " WHERE $key = $val";
		}

		$stmt = $dbConn->prepare($updateSql);

		$boolResponse = $stmt->execute();

		return $boolResponse ?  : false;
	}

	/**
	 * This method retrieves record from a table
	 * @params int id, string tableName
	 * @return array
	 */
	public static function read($id, $tableName, $dbConn = Null)
	{
		$tableData = array();

		if (is_null($dbConn)) {

			$dbConn = new DatabaseConnection();

		}

		$sql = $id  ? 'SELECT * FROM '.$tableName.' WHERE id = '.$id : 'SELECT * FROM '.$tableName;

		try {
			$stmt = $dbConn->prepare($sql);
			$stmt->bindValue(':table', $tableName);
			$stmt->bindValue(':id', $id);
			$stmt->execute();

		} catch (PDOException $e) {


			return  $e->getMessage();
		}
		$results = $stmt->fetchAll(PDO::FETCH_ASSOC);

		foreach($results as $result) {

			array_push($tableData, $result);
		}

		return $tableData;
	}

	/**
	 * This method deletes a record  from a table row
	 * @params int id, string tableName
	 * @return boolean true or false
	 */
	public static function delete($id, $tableName, $dbConn = Null)
	{
		if (is_null($dbConn)) {

			$dbConn = new DatabaseConnection();

		}

		$sql = 'DELETE FROM '.$tableName.' WHERE id = '.$id;

		$boolResponse = $dbConn->exec($sql);

		return $boolResponse ? : false;
	}

	/**
	 * This method checks if the magic setters array is the same as the table columns
	 * @param array $tableColumn
	 * @param array $userSetterArray
	 * @return array $unexpectedFields
	 */
	public static function checkIfMagicSetterContainsIsSameAsClassModel(array $tableColumn, array $userSetterArray)
	{
		$unexpectedFields = [];

		foreach ($userSetterArray as $key => $val)
		{
			if (!in_array($key,$tableColumn)) {

				$unexpectedFields[] = $key;
			}
		}

		return $unexpectedFields;
	}

	/**
	 * This method returns sql query
	 * @param $sql
	 * @return string
	 */
	private function prepareUpdateQuery($sql)
	{
		$splittedQuery = explode(",",$sql);

		array_pop($splittedQuery);

		$mergeData = implode(",",$splittedQuery);

		return $mergeData;
	}

	/**
	 * @param array $params
	 * @param $tableName
	 * @param $dbConn
	 * @return bool
	 * @throws EmptyArrayException
	 */
	public function findAndWhere($params, $tableName, $dbConn)
	{
		if (is_null($dbConn)) {

			$dbConn = $this->dbConnection;
		}

		if (is_array($params) && !empty($params)) {

			$sql = "SELECT * FROM ".$tableName;

			foreach ($params as $key => $val) {

				$sql .= " WHERE $key = $val";
			}

			$statement = $dbConn->prepare($sql);

			$statement->execute();

			$returnedRowNumbers = $statement->rowCount();

			return $returnedRowNumbers  ? true : false;
		}

		throw EmptyArrayException::checkEmptyArrayException("Array Expected: parameter passed to this function is not an array");
	}

	/**
	 * This method returns column fields of a particular table
	 * @param $table
	 * @param $conn
	 * @return array
	 */
	public function getColumnNames($table, $dbConn = Null){

		$tableFields = [];

		try {

			if (is_null($dbConn)) {

				$dbConn = $this->dbConnection;
			}

			$sql = "SHOW COLUMNS FROM ".$table;

			$stmt = $dbConn->prepare($sql);
			$stmt->bindValue(':table', $table, PDO::PARAM_STR);
			$stmt->execute();

			$results = $stmt->fetchAll(PDO::FETCH_ASSOC);

			foreach($results as $result) {
				array_push($tableFields, $result['Field']);
			}

			return $tableFields;

		} catch (PDOException $e) {


			trigger_error('Could not connect to MySQL database. ' . $e->getMessage() , E_USER_ERROR);
		}
	}


}


1			<?php
2
3			/**
4			* @package Laztopaz\potato-ORM
5			* @author Temitope Olotin <[email protected]>
6			* @license <https://opensource.org/license/MIT> MIT
7			*/
8
9			namespace Laztopaz\potatoORM;
10
11			use PDO;
12			use Laztopaz\potatoORM\DatabaseHelper;
13			use Laztopaz\potatoORM\TableFieldUndefinedException;
14			use Laztopaz\potatoORM\EmptyArrayException;
15
16			class DatabaseHandler {
17
18			private $tableFields;
			0 ignored issues – show Unused Code introduced 2016-02-28 17:45 UTC by Report Bug Copy Issue Report The property `$tableFields` is not used and could be removed. This check marks private properties in classes that are never used. Those properties can be removed. Loading history...
19			private $dbHelperInstance;
			0 ignored issues – show Unused Code introduced 2016-02-28 17:45 UTC by Report Bug Copy Issue Report The property `$dbHelperInstance` is not used and could be removed. This check marks private properties in classes that are never used. Those properties can be removed. Loading history...
20			private $dbConnection;
21			private $model;
22
23			/**
24			* This is a constructor; a default method that will be called automatically during class instantiation
25			*/
26			public function __construct($modelClassName, $dbConn = Null)
27			{
28			if (is_null($dbConn)) {
29			$this->dbConnection = new DatabaseConnection();
30			} else {
31			$this->dbConnection = $dbConn;
32			$this->model = $modelClassName;
33			}
34
35			//$this->dbHelperInstance = new DatabaseHelper($this->dbConnection);
			0 ignored issues – show Unused Code Comprehensibility introduced 2016-02-28 17:45 UTC by Report Bug Copy Issue Report `54%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
36
37			//$this->tableFields = $this->dbHelperInstance->getColumnNames($modelClassName, $dbConn);
			0 ignored issues – show Unused Code Comprehensibility introduced 2016-02-28 17:45 UTC by Report Bug Copy Issue Report `62%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
38			}
39
40			/**
41			* This method create a record and store it in a table row
42			* @params associative array, string tablename
43			* @return boolean true or false
44			*/
45			public function create($associative1DArray, $tableName, $dbConn = Null)
46			{
47			$unexpectedFields = self::checkIfMagicSetterContainsIsSameAsClassModel($this->getColumnNames($this->model, $this->dbConnection),$associative1DArray);
			0 ignored issues – show Bug introduced 2016-02-28 17:45 UTC by Report Bug Copy Issue Report It seems like `$this->getColumnNames($t...l, $this->dbConnection)` targeting `Laztopaz\potatoORM\Datab...ndler::getColumnNames()` can also be of type `null`; however, `Laztopaz\potatoORM\Datab...insIsSameAsClassModel()` does only seem to accept `array`, maybe add an additional type check? This check looks at variables that are passed out again to other methods. If the outgoing method call has stricter type requirements than the method itself, an issue is raised. An additional type check may prevent trouble. Loading history...
48
49			if (count($unexpectedFields) > 0)
50			{
51			throw TableFieldUndefinedException::fieldsNotDefinedException($unexpectedFields,"needs to be created as table field");
52			}
53
54			unset($this->getColumnNames($this->model, $this->dbConnection)[0]);
55
56			if (is_null($dbConn)) {
57			$dbConn = $this->dbConnection;
58			}
59
60			$insertQuery = 'INSERT INTO '.$tableName;
61
62			$TableValues = implode(',',array_keys($associative1DArray));
63
64			foreach ($associative1DArray as $field => $value) {
65
66			$FormValues[] = "'".trim(addslashes($value))."'";
			0 ignored issues – show Coding Style Comprehensibility introduced 2016-02-26 19:31 UTC by Report Bug Copy Issue Report `$FormValues` was never initialized. Although not strictly required by PHP, it is generally a good practice to add `$FormValues = array();` before regardless. Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code. Let’s take a look at an example: foreach ($collection as $item) { $myArray['foo'] = $item->getFoo(); if ($item->hasBar()) { $myArray['bar'] = $item->getBar(); } // do something with $myArray } As you can see in this example, the array `$myArray` is initialized the first time when the foreach loop is entered. You can also see that the value of the `bar` key is only written conditionally; thus, its value might result from a previous iteration. This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization `$myArray = array()` either outside or inside the foreach loop. Loading history...
67			}
68			$splittedTableValues = implode(',', $FormValues);
			0 ignored issues – show Bug introduced 2016-02-26 19:31 UTC by Report Bug Copy Issue Report The variable `$FormValues` does not seem to be defined for all execution paths leading up to this point. If you define a variable conditionally, it can happen that it is not defined for all execution paths. Let’s take a look at an example: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } // $x is potentially undefined here. echo $x; } In the above example, the variable `$x` is defined if you pass “foo” or “bar” as argument for `$a`. However, since the `switch` statement has no default case statement, if you pass any other value, the variable `$x` would be undefined. Available Fixes Check for existence of the variable explicitly: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } if (isset($x)) { // Make sure it's always set. echo $x; } } Define a default value for the variable: function myFunction($a) { $x = ''; // Set a default which gets overridden for certain paths. switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; } echo $x; } Add a value for the missing path: function myFunction($a) { switch ($a) { case 'foo': $x = 1; break; case 'bar': $x = 2; break; // We add support for the missing case. default: $x = ''; break; } echo $x; } Loading history...
69
70			$insertQuery.= ' ('.$TableValues.')';
71
72			$insertQuery.= ' VALUES ('.$splittedTableValues.')';
73
74			$executeQuery = $dbConn->exec($insertQuery);
75
76			return $executeQuery ? : false;
77			}
78
79			/*
80			* This method updates any table by supplying 3 parameter
81			* @params: $updateParams, $tableName, $associative1DArray
82			* @return boolean true or false
83			*/
84			public function update(array $updateParams, $tableName, $associative1DArray, $dbConn = Null)
85			{
86			$sql = "";
87
88			if (is_null($dbConn)) {
89
90			$dbConn = $this->dbConnection;
91			}
92
93			$updateSql = "UPDATE `$tableName` SET ";
94
95			unset($associative1DArray['id']);
96
97			$unexpectedFields = self::checkIfMagicSetterContainsIsSameAsClassModel($this->getColumnNames($this->model, $this->dbConnection),$associative1DArray);
			0 ignored issues – show Bug introduced 2016-02-28 17:45 UTC by Report Bug Copy Issue Report It seems like `$this->getColumnNames($t...l, $this->dbConnection)` targeting `Laztopaz\potatoORM\Datab...ndler::getColumnNames()` can also be of type `null`; however, `Laztopaz\potatoORM\Datab...insIsSameAsClassModel()` does only seem to accept `array`, maybe add an additional type check? This check looks at variables that are passed out again to other methods. If the outgoing method call has stricter type requirements than the method itself, an issue is raised. An additional type check may prevent trouble. Loading history...
98
99			if (count($unexpectedFields) > 0) {
100
101			throw TableFieldUndefinedException::fieldsNotDefinedException($unexpectedFields,"needs to be created as table field");
102			}
103
104
105			foreach($associative1DArray as $field => $value)
106			{
107			$sql .= "`$field` = '$value'".",";
108			}
109
110			$updateSql .= $this->prepareUpdateQuery($sql);
111
112			foreach ($updateParams as $key => $val) {
113
114			$updateSql .= " WHERE $key = $val";
115			}
116
117			$stmt = $dbConn->prepare($updateSql);
118
119			$boolResponse = $stmt->execute();
120
121			return $boolResponse ? : false;
122			}
123
124			/**
125			* This method retrieves record from a table
126			* @params int id, string tableName
127			* @return array
128			*/
129			public static function read($id, $tableName, $dbConn = Null)
130			{
131			$tableData = array();
132
133			if (is_null($dbConn)) {
134
135			$dbConn = new DatabaseConnection();
136
137			}
138
139			$sql = $id ? 'SELECT * FROM '.$tableName.' WHERE id = '.$id : 'SELECT * FROM '.$tableName;
140
141			try {
142			$stmt = $dbConn->prepare($sql);
143			$stmt->bindValue(':table', $tableName);
144			$stmt->bindValue(':id', $id);
145			$stmt->execute();
146
147			} catch (PDOException $e) {
			0 ignored issues – show Bug introduced 2016-02-26 19:31 UTC by Report Bug Copy Issue Report The class `Laztopaz\potatoORM\PDOException` does not exist. Did you forget a USE statement, or did you not list all dependencies? Scrutinizer analyzes your `composer.json`/`composer.lock` file if available to determine the classes, and functions that are defined by your dependencies. It seems like the listed class was neither found in your dependencies, nor was it found in the analyzed files in your repository. If you are using some other form of dependency management, you might want to disable this analysis. Loading history...
148
149			return $e->getMessage();
150			}
151			$results = $stmt->fetchAll(PDO::FETCH_ASSOC);
152
153			foreach($results as $result) {
154
155			array_push($tableData, $result);
156			}
157
158			return $tableData;
159			}
160
161			/**
162			* This method deletes a record from a table row
163			* @params int id, string tableName
164			* @return boolean true or false
165			*/
166			public static function delete($id, $tableName, $dbConn = Null)
167			{
168			if (is_null($dbConn)) {
169
170			$dbConn = new DatabaseConnection();
171
172			}
173
174			$sql = 'DELETE FROM '.$tableName.' WHERE id = '.$id;
175
176			$boolResponse = $dbConn->exec($sql);
177
178			return $boolResponse ? : false;
179			}
180
181			/**
182			* This method checks if the magic setters array is the same as the table columns
183			* @param array $tableColumn
184			* @param array $userSetterArray
185			* @return array $unexpectedFields
186			*/
187			public static function checkIfMagicSetterContainsIsSameAsClassModel(array $tableColumn, array $userSetterArray)
188			{
189			$unexpectedFields = [];
190
191			foreach ($userSetterArray as $key => $val)
192			{
193			if (!in_array($key,$tableColumn)) {
194
195			$unexpectedFields[] = $key;
196			}
197			}
198
199			return $unexpectedFields;
200			}
201
202			/**
203			* This method returns sql query
204			* @param $sql
205			* @return string
206			*/
207			private function prepareUpdateQuery($sql)
208			{
209			$splittedQuery = explode(",",$sql);
210
211			array_pop($splittedQuery);
212
213			$mergeData = implode(",",$splittedQuery);
214
215			return $mergeData;
216			}
217
218			/**
219			* @param array $params
220			* @param $tableName
221			* @param $dbConn
222			* @return bool
223			* @throws EmptyArrayException
224			*/
225			public function findAndWhere($params, $tableName, $dbConn)
226			{
227			if (is_null($dbConn)) {
228
229			$dbConn = $this->dbConnection;
230			}
231
232			if (is_array($params) && !empty($params)) {
233
234			$sql = "SELECT * FROM ".$tableName;
235
236			foreach ($params as $key => $val) {
237
238			$sql .= " WHERE $key = $val";
239			}
240
241			$statement = $dbConn->prepare($sql);
242
243			$statement->execute();
244
245			$returnedRowNumbers = $statement->rowCount();
246
247			return $returnedRowNumbers ? true : false;
248			}
249
250			throw EmptyArrayException::checkEmptyArrayException("Array Expected: parameter passed to this function is not an array");
251			}
252
253			/**
254			* This method returns column fields of a particular table
255			* @param $table
256			* @param $conn
257			* @return array
258			*/
259			public function getColumnNames($table, $dbConn = Null){
260
261			$tableFields = [];
262
263			try {
264
265			if (is_null($dbConn)) {
266
267			$dbConn = $this->dbConnection;
268			}
269
270			$sql = "SHOW COLUMNS FROM ".$table;
271
272			$stmt = $dbConn->prepare($sql);
273			$stmt->bindValue(':table', $table, PDO::PARAM_STR);
274			$stmt->execute();
275
276			$results = $stmt->fetchAll(PDO::FETCH_ASSOC);
277
278			foreach($results as $result) {
279			array_push($tableFields, $result['Field']);
280			}
281
282			return $tableFields;
283
284			} catch (PDOException $e) {
			0 ignored issues – show Bug introduced 2016-02-26 19:31 UTC by Report Bug Copy Issue Report The class `Laztopaz\potatoORM\PDOException` does not exist. Did you forget a USE statement, or did you not list all dependencies? Scrutinizer analyzes your `composer.json`/`composer.lock` file if available to determine the classes, and functions that are defined by your dependencies. It seems like the listed class was neither found in your dependencies, nor was it found in the analyzed files in your repository. If you are using some other form of dependency management, you might want to disable this analysis. Loading history...
285
286			trigger_error('Could not connect to MySQL database. ' . $e->getMessage() , E_USER_ERROR);
287			}
288			}
289
290
291			}
292

andela-tolotin / Potato-ORM

Push — test ( dd676d...2ee69c )

DatabaseHandler::__construct() A

Complexity

Size

Duplication

Importance

Available Fixes

Duplication Side-by-Side

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