falco442/lumen-treeview

This package is intended for generating a tree structure from flat data (array); it makes use of the class Illuminate\Support\Collection, so is intended for Lumen/Laravel projects.

Requirements

• PHP >= 8.0
• OpenSSL PHP Extension
• PDO PHP Extension
• Mbstring PHP Extension
• laravel/lumen-framework >= 9.0

Installation

from command line, in the root folder of your Laravel/Lumen project, run the command

composer require falco442/lumen-treeview

Parameters

Static method getTree()

name	type	default value	description
$array	array	none. required.	this is the array to pass.
$parentIdField	string	'parent_id'	the name for the parent field with which is constructed the relation
$idField	string	'id'	the name for the main field of the array, usually the primary key of the table from which data are taken
$childrenField	string	'children'	the name for the field which to put the children in, in the returned tree

Static method getNode()

name	type	default value	description
$array	array	none. required.	this is the array to pass. Is taken by reference
$id	string || number	none. required.	The id of the node to take for which construct the tree
$parentIdField	string	'parent_id'	the name for the parent field with which is constructed the relation
$idField	string	'id'	the name for the main field of the array, usually the primary key of the table from which data are taken
$childrenField	string	'children'	the name for the field which to put the children in, in the returned tree
$node	array	null	The node instance to pass to the method. optional, and not to be used to construct the tree. Internal use only.

Usage

Get all trees (root nodes as array of nodes)

You can call the function getTree() to an array of arrays (for example a collection got from Eloquent) like this:

<?php

namespace App\Http\Controllers;

use App\Models\Post;
use falco442\Treeview;
use Illuminate\Http\Request;
use Illuminate\Http\Response;

class PostsController extends Controller
{
    public function tree()
    {
        $posts = Post::all()->transform(function ($item) {
            if ($item->parent_id === 0) {
                $item->parent_id = null;
            }
            return $item;
        })->toArray();

        return \response()->json(Treeview::getTree($posts));
    }
}

Get single node tree

You can call the static method of the class TreeView to retrieve the tree relative to a node like this, inserting the id as parameter ID:

<?php

namespace App\Http\Controllers;

use App\Models\Post;
use falco442\Treeview;
use Illuminate\Http\Request;
use Illuminate\Http\Response;

class PostsController extends Controller
{
    public function tree()
    {
        $posts = Post::all()->transform(function ($item) {
            if ($item->parent_id === 0) {
                $item->parent_id = null;
            }
            return $item;
        })->toArray();

        return \response()->json(Treeview::getTree($posts, 101));
    }
}