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https://github.com/d0niek/php-generic

Generator for generic array/vector.
https://github.com/d0niek/php-generic

array generator generic php php71 vector

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Generator for generic array/vector.

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# Prepare for future with php-generic



According to this [article](https://www.sitepoint.com/creating-strictly-typed-arrays-collections-php/)

which shows how to create strictly typed arrays and collections in Php7, php-generic generator was born.



---



There is some [discusion](https://wiki.php.net/rfc/generic-arrays) about generic in Php

but who knows when it comes to us.



It is not exacly what you know from Java or C++ where generic looks like

`Vector()`, `Array()` or `Vector<\Namespace\Entity\User>()`.



Here generics looks like `VectorInt`, `ArrayBool` and `VectorUser`

so I hope when they come to nativ Php all what you need to do will be:

1. Replace all `VectorType`, `ArrayType` to `Vector`, `array`,

2. Delete directory where you store all generated array/vector,

3. Enjoy a nice day.



## What generics are (not)



They are not collections like Doctrine or Laravel Collections. They are like normal php array

which can store values one type. `array` can store only numeric values which will converted to `int`

so you can not push `'some string value'` to it.



## Install



```bash

$ composer require d0niek/php-generic

```



## Generate generic `array`



There is a bin command that you should find in **vendor/bin**

or somewhere else according to your **composer.json** settings.



To generate a generic array run:



```bash

$ bin/generic generate:array [-s|--save [SAVE]] [--]  

```

where:

* **-s**|**--saveCollection** - do you want to save generated array for future regenerate (default **true**),

* **type** - is a type of generic array. It can be simple type (bool, int, float, string, array)

or complex type (\\YourApp\\Module\\Repository\\User),

* **namespace** - is a namespace where new generic array will be save.

Remember that namespace's directory have to exists.

To separate namespace parts use **\\\\** or **/** to speed up typing

if your namespace is 1:1 with your directory structure



For example you have project in **/path/to/project** and your **composer.json** contains this kind of entry:

```json

"autoload": {

    "psr-4": {

        "VendorName\\AppName\\": "src/"

    }

}

```

Now, when you call command like this:

```bash

$ bin/generic generate:array int VendorName\\AppName\\Collections

```

new generic array `ArrayInt` will be save to **/path/to/project/src/Collections/** directory.

If this directory does not exists, exceptions will be throw.

> Tip! Store all php-generics in one diretory and add it to **.gitignore**.

When php will start support generics, replace `ArrayInt` to `array` and remove php-generic directory.



## Generate generic `Vector`



You can alse generate generic [\\Ds\\Vector](http://php.net/manual/en/class.ds-vector.php)

(it is new data structure since Php7,

    [here](https://medium.com/@rtheunissen/efficient-data-structures-for-php-7-9dda7af674cd)

    you can and you should read about it!). To do this just run:

```bash

$ bin/generic generate:vector [-s|--save [SAVE]] [--]  

```

parameters means exacly the same whats means when you run `generate:array`.



## Regenerate



By defaule generated array/vector are save in **generated-colletions.json** file in your root app path.

Keep this file in repository and ignore all generated php-generics. When you clone repository,

after `composer install` run:

```bash

$ bin/generic collections:regenerate

```

and all your collections will be regenerate.



## Select data from DB



Now you can create in easy way specific generic when you are selecting data from DB

```php

class UserRepository implements UserRepositoryInterface

{

    ...



    /**

     * @inheritDoc

     */

    public function findAll(): VectorUser

    {

        $users = new VectorUser();

        $mysqli = new \mysqli('localhost:3306', 'user', 'password', 'db');



        $mysqliResult = $mysqli->query('SELECT id, name FROM users LIMIT 10');

        if ($mysqliResult !== false) {

            while (($user = $mysqliResult->fetch_object(User::class)) !== null) {

                $users->push($user);

            }

        }



        $mysqli->close();



        return $users;

    }



    ...

}

```



## Test



Before you run tests remember to regenerate collections. Run:

```bash

$ bin/generic collections:regenerate

```

and now you can run

```bash

$ phpunit

```