Merge pull request #13 from thetar/patch-1

Added setIndent()

README.md

@@ -59,6 +59,23 @@ By default it will look for a `title` column. You can send a custom column name
 Model::orderBy('parent_id')->get()->nest()->listsFlattened('name');
 ```
 
+Four spaces are used to indent by default, to use your own use the `setIndent()` method, followed by the `listsFlattened()` method:
+
+```php
+Model::orderBy('parent_id')->get()->nest()->setIndent('> ')->listsFlattened();
+```
+
+Results:
+
+```php
+[
+    '22' => 'Item 1 Title',
+    '10' => '> Child 1 Title',
+    '17' => '> Child 2 Title',
+    '14' => 'Item 2 Title',
+]
+```
+
 ## Nesting a subtree
 
 This package remove items that have missing ancestor, this doesn’t allow you to nest a branch of a tree.

src/NestableCollection.php

@@ -18,6 +18,7 @@ class NestableCollection extends Collection
     private $total;
     private $parentColumn;
     private $removeItemsWithMissingAncestor = true;
+    private $indentChars = '    ';
 
     public function __construct($items = [])
     {
@@ -87,9 +88,10 @@ public function nest()
      *
      * @return array
      */
-    public function listsFlattened($column = 'title', BaseCollection $collection = null, $level = 0, array &$flattened = [], $indentChars = '    ')
+    public function listsFlattened($column = 'title', BaseCollection $collection = null, $level = 0, array &$flattened = [], $indentChars = null)
     {
         $collection = $collection ?: $this;
+        $indentChars = $indentChars ?: $this->indentChars;
         foreach ($collection as $item) {
             $flattened[$item->id] = str_repeat($indentChars, $level).$item->$column;
             if ($item->items) {
@@ -100,6 +102,17 @@ public function listsFlattened($column = 'title', BaseCollection $collection = n
         return $flattened;
     }
 
+    /**
+     * Change the default indent characters when flattening lists
+     *
+     * @param string $indentChars
+     * @return $this
+     */
+    public function setIndent(string $indentChars) {
+        $this->indentChars = $indentChars;
+        return $this;
+    }
+
     /**
      * Force keeping items that have a missing ancestor.
      *