add nova

nova/src/Metrics/PartitionResult.php

@@ -0,0 +1,98 @@
+<?php
+
+namespace Laravel\Nova\Metrics;
+
+use Closure;
+use JsonSerializable;
+
+class PartitionResult implements JsonSerializable
+{
+    use RoundingPrecision;
+
+    /**
+     * The value of the result.
+     *
+     * @var array<string, int|float>
+     */
+    public $value;
+
+    /**
+     * The custom label name.
+     *
+     * @var array<string, string>
+     */
+    public $labels = [];
+
+    /**
+     * The custom label colors.
+     *
+     * @var \Laravel\Nova\Metrics\PartitionColors
+     */
+    public $colors;
+
+    /**
+     * Create a new partition result instance.
+     *
+     * @param  array<string, int|float>  $value
+     * @return void
+     */
+    public function __construct(array $value)
+    {
+        $this->value = $value;
+        $this->colors = new PartitionColors();
+    }
+
+    /**
+     * Format the labels for the partition result.
+     *
+     * @param  \Closure(string):string  $callback
+     * @return $this
+     */
+    public function label(Closure $callback)
+    {
+        $this->labels = collect($this->value)->mapWithKeys(function ($value, $label) use ($callback) {
+            return [$label => $callback($label !== '' ? $label : null)];
+        })->all();
+
+        return $this;
+    }
+
+    /**
+     * Set the custom label colors.
+     *
+     * @param  array<string, string>  $colors
+     * @return $this
+     */
+    public function colors(array $colors)
+    {
+        $this->colors = new PartitionColors($colors);
+
+        return $this;
+    }
+
+    /**
+     * Prepare the metric result for JSON serialization.
+     *
+     * @return array<string, array<array-key, array<string, mixed>>>
+     */
+    public function jsonSerialize(): array
+    {
+        $values = collect($this->value);
+        $total = $values->sum();
+
+        return [
+            'value' => $values->map(function ($value, $label) use ($total) {
+                $resolvedLabel = $this->labels[$label] ?? $label;
+
+                return array_filter([
+                    'color' => data_get($this->colors->colors, $label, $this->colors->get($resolvedLabel)),
+                    'label' => $resolvedLabel,
+                    'value' => $value,
+                    'percentage' => $total > 0 ? round(($value / $total) * 100, $this->roundingPrecision, $this->roundingMode) : 0,
+                ], function ($value) {
+                    return ! is_null($value);
+                });
+            })->values()->all(),
+        ];
+    }
+}