Tree builder helper

this is a small library for symfony console to print a tree in a fluent and flexible way.

The output is similar as the linux tree command, an can be used to debug/output relational data.

Usage:

$tree = new TreeHelper($output);

$tree
    ->newNode('first')
        ->addValue('fist value')
        ->addValue('second value')
        ->newNode('fist sub')
            ->addValue('fist sub value')
            ->addValue('second sub value')
            ->newNode('fist sub sub')
                ->addValue('fist sub sub value')
                ->addValue('second sub sub value')            
            ->end()
        ->end()
    ->newNode('second')
        ->addValue('second value')
        ->addValue('second second value')
    ->end();
    
$tree->printTree();    

or

$tree = new TreeHelper($output);
$tree->addArray([
    'first' => [
        0 => 'fist value',
        1 => 'second value',
        'fist sub' => [
            0 => 'fist sub value',
            1 => 'second sub value',
            'fist sub sub' => [
                'fist sub sub value',
                'second sub sub value',
            ],
        ],
    ],
    'second' => [
        'second value',
        'second second value',
    ]
]);

that will output:

.
│
└── first
    ├── fist value
    ├── second value
    ├── fist sub
    │   ├── fist sub value
    │   ├── second sub value
    │   └── fist sub sub
    │       ├── fist sub sub value
    │       └── second sub sub value
    └── second
        ├── second value
        └── second second value

for other example see the the tests.

Methods

newNode($name)

Create an new node and bind it to the parent

addNode($nodeobject:self)

Append node to tree

end()

Will return the parent object (if set else null)

getRoot()

Will return the root node

printTree($outputobject:OutputInterface)

Print the tree to output

findNode($name)

Search a node by title

toArray()

Returns a array representation of the data

getTitle()

Returns the title of the node

setTitle($title)

Sets the title of the node

addValue($value)

Add a value to the node, this can be a valid scalar or a object with method __toString

addArray($array)

Add a nested array to node

setValues($array)

Add a flat array to node, this be set as the values of the node

setParent($parentobject:self)

Set the parent of the node, will trow a RuntimeException is the the node all ready is linked to the given node, so we don`t get infinite loops.

getNodes()

Get all the (child) nodes defined in the node, all the nodes are only saved in the root so to get all nodes you probably have to do this $t->getRoot()->getNodes(); else it will return the nodes where the parent is set as node where from you calling the method.

setMaxDepth($depth)

Set the max depth of the node values, this can be done globally (on root) or on a specific node.

getMaxDepth()

Return the max depth that is set

setFormats()

Set the form that is used for example:

$tree->setFormats([
    TreeHelper::LINE_PREFIX_EMPTY => '  ',
    TreeHelper::LINE_PREFIX => '│ ',
    TreeHelper::TEXT_PREFIX => '├ ',
    TreeHelper::TEXT_PREFIX_END => '└ ',
]);

no it will use a 2 space indent instead of 4, see tests

setFormat($id, $format)

Overwrite a specific format