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# Available PHP methods

These are only available PHP methods that you can use:
```php
// App::env($name='', $default=str|int|float) - Retrieves environment variable from project's configuration - returns environment variable value, or default value;
$value = App::env('ENV_VARIABLE', 1); // If you ever will need environment variable in code, do not create '.env' file - just call it using App::env('...');

// App::path($path='') - Applies project's directory to given group page '{group}/{page}/{file}' path - returns real path of page code block file or folder;
$file = App::path('public/home/file.txt');

// App::user() - Checks session to get authorized user id - returns user's id if authorized, or 0;
$user = App::user();

// App::login($user_id) - Registers authorized user id in session - returns true;
$result = App::login($user_id);

// App::logout() - Deletes authorized user session - returns true;
$result = App::logout();

// DB::insert($table='', $data=[]) - Prepares statement, binds data column values and inserts new row in database - returns record id or false;
$id = DB::insert('users', [
    'name' => 'John',
    'email' => 'john@mail.com'
]);

// DB::update($table='', $data=[], $where=[], $where_vars=[]) - Updates record columns where sql line conditions met - returns true or false;
$result = DB::update(
    'users',
    ['name' => 'Mike'],
    ['id = :id', 'status = 1'],
    ['id' => 5]
);

// DB::delete($table='', $where=[], $where_vars=[]) - Deletes record where sql line conditions met - returns true or false;
$result = DB::delete(
    'users',
    ['id = :id', 'status = 1'],
    ['id' => 5]
);

// DB::query($statement=[], $statement_vars=[]) - takes sql lines, queries the database - returns array of records;
$rows = DB::query([
    'SELECT',
    '*',
    'FROM users',
    'WHERE',
    'id = :id',
    'and status = 1',
], [
    'id' => 5
]);

// DB::submit($sql=[], $sql_vars=[]) - takes sql lines, submits custom sql code - returns true if completed or false;
$result = DB::submit([
    'CREATE TABLE test (',
    'id INT AUTO_INCREMENT PRIMARY KEY,',
    'name VARCHAR(100)',
    ')'
]);
```

Note:
DB sql statement is array of sql lines like [
'select from table',
'*',
'where',
'id = :id'
];
sql statements and code can have vars like this '... id = :id';
..._vars=[] are statements parameters structured like this ['id'=>2];

# Available JavaScript App methods

These are available JavaScript App object methods that you can use:
App.error(message) - Display success message;
App.info(message) - Display info message;
App.success(message) - Display success message;
App.call(page, method, data, code) - Call PHP backend methods;
  - @param page - PHP class file name (without .php).
  - @param method - Public method name in PHP class.
  - @param data - Data to send.
  - @param code - Callback function to handle json response.

# Existing project files

```txt
[[files]]
```

# Existing database schema

This is the existing database schema:

```sql
[[database_schema]]
```

# Existing code base to fix

This is the existing code base that you must fix based on user request:

[[code_base]]

# Required code blocks

Generate following complete functional code blocks based on needs in this exact sequence:
0. "db.sql" - fixed separated SQL code block if needed (skippable) - ready to execute in database;
2. "page.html" - fixed separated HTML code block if needed (skippable) - responsive structure without inline styles and scripts;
3. "style.css" - fixed separated CSS code block if needed (skippable) - responsive styles;
4. "script.js" - fixed separated jQuery JavaScript code block if needed (skippable) - handling complex actions;
5. "code.php" - fixed separated PHP code block (mandatory, even if no methods, class is required) - handling business logic;
N. "..." - any other separated code block if needed - handling custom logic;

Each code block MUST have file name specified above the code block;
File names MUST be specified above the relevant code blocks with numeration like this:
...

1. db.sql
```sql
... sql code here ...
```

2. page.html
```html
... html code here ...
```

... and so on.

# Last code block

N. "config.json" - This is the last (mandatory) file code block you must fill. Do not change this JSON data keys, you must set values for them and return as JSON code block:
{
    "page-name": Specified name of the page (e.g "edititem"),
    "page-group": Specified group category of the page (e.g "public", "private" or other), if not specified set "public",
    "group-description": What does the detected page group category means for the page (e.g "public - means that only unregistered users can access the page"),
    "composer-plugins": [
        PHP code required composer plugin to install (e.g "phpmailer/phpmailer"), if not required by PHP code leave it empty,
    ]
}

# Rules to follow

These are rules to follow:
- Each code block should contain complete fixed functional code;
- In HTML code you can use font-awesome free icons if you need any;
- In HTML code do not include links for font-awesome icons, jquery, css and js files!
- In HTML code use '/assets/default.png' src if you need to add <img> tag;
- In HTML code use '/assets/default.mp4' src if you need to add <video> tag;
- In HTML code use '/assets/default.mp3' src if you need to add <audio> tag;
- In jQuery JavaScript code always use JS method App.error|info|success(message) to display system messages on page;
- In jQuery JavaScript code always use JS method App.call(request_url, php_method, data, code) to submit or retrieve data using PHP methods;
- In jQuery JavaScript code App.call(...) usage example App.call("items", "getItems", {id: 3}, (echo)=>{ console.log(echo) });
- PHP code is PHP class named with page's name (e.g 'edititem', not 'EditItem', not 'edit_item', just 'edititem');
- In PHP code each method has arguments ($post = [], $get = [], $files = []) that are passed from internal system, not from App.call(...) method;
- In PHP code each JS App.call(...) callable method is public, other methods should be private helpers if needed used by public methods;
- In PHP code each method is called via App.call(...) method from jQuery JavaScript code;
- In PHP code you can use these methods to return response: App::error|info|success(message, response);
- In jQuery JavaScript JS App.call(..., code=(echo)=>{ ... }) PHP action method returns json response as echo argument of code() argument that will be executed once called PHP method returns response to jQuery JavaScript code with this format:
  {
    "message": "Demo message ...",
    "response": array, string, bool, number or float value,
    "error": true or false
  }

# User request

You must fix described issue in required existing structured code blocks for this user request:
[[message]]
