add nova

nova/src/Metrics/Partition.php

@@ -0,0 +1,154 @@
+<?php
+
+namespace Laravel\Nova\Metrics;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Database\Query\Expression;
+use Illuminate\Support\Facades\DB;
+use Laravel\Nova\Util;
+
+abstract class Partition extends Metric
+{
+    use RoundingPrecision;
+
+    /**
+     * The element's component.
+     *
+     * @var string
+     */
+    public $component = 'partition-metric';
+
+    /**
+     * Return a partition result showing the segments of a count aggregate.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @param  \Illuminate\Database\Eloquent\Builder|class-string<\Illuminate\Database\Eloquent\Model>  $model
+     * @param  \Illuminate\Database\Query\Expression|string  $groupBy
+     * @param  \Illuminate\Database\Query\Expression|string|null  $column
+     * @return \Laravel\Nova\Metrics\PartitionResult
+     */
+    public function count($request, $model, $groupBy, $column = null)
+    {
+        return $this->aggregate($request, $model, 'count', $column, $groupBy);
+    }
+
+    /**
+     * Return a partition result showing the segments of an average aggregate.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @param  \Illuminate\Database\Eloquent\Builder|class-string<\Illuminate\Database\Eloquent\Model>  $model
+     * @param  \Illuminate\Database\Query\Expression|string|null  $column
+     * @param  \Illuminate\Database\Query\Expression|string  $groupBy
+     * @return \Laravel\Nova\Metrics\PartitionResult
+     */
+    public function average($request, $model, $column, $groupBy)
+    {
+        return $this->aggregate($request, $model, 'avg', $column, $groupBy);
+    }
+
+    /**
+     * Return a partition result showing the segments of a sum aggregate.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @param  \Illuminate\Database\Eloquent\Builder|class-string<\Illuminate\Database\Eloquent\Model>  $model
+     * @param  \Illuminate\Database\Query\Expression|string|null  $column
+     * @param  \Illuminate\Database\Query\Expression|string  $groupBy
+     * @return \Laravel\Nova\Metrics\PartitionResult
+     */
+    public function sum($request, $model, $column, $groupBy)
+    {
+        return $this->aggregate($request, $model, 'sum', $column, $groupBy);
+    }
+
+    /**
+     * Return a partition result showing the segments of a max aggregate.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @param  \Illuminate\Database\Eloquent\Builder|class-string<\Illuminate\Database\Eloquent\Model>  $model
+     * @param  \Illuminate\Database\Query\Expression|string|null  $column
+     * @param  \Illuminate\Database\Query\Expression|string  $groupBy
+     * @return \Laravel\Nova\Metrics\PartitionResult
+     */
+    public function max($request, $model, $column, $groupBy)
+    {
+        return $this->aggregate($request, $model, 'max', $column, $groupBy);
+    }
+
+    /**
+     * Return a partition result showing the segments of a min aggregate.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @param  \Illuminate\Database\Eloquent\Builder|class-string<\Illuminate\Database\Eloquent\Model>  $model
+     * @param  \Illuminate\Database\Query\Expression|string|null  $column
+     * @param  \Illuminate\Database\Query\Expression|string  $groupBy
+     * @return \Laravel\Nova\Metrics\PartitionResult
+     */
+    public function min($request, $model, $column, $groupBy)
+    {
+        return $this->aggregate($request, $model, 'min', $column, $groupBy);
+    }
+
+    /**
+     * Return a partition result showing the segments of a aggregate.
+     *
+     * @param  \Laravel\Nova\Http\Requests\NovaRequest  $request
+     * @param  \Illuminate\Database\Eloquent\Builder|class-string<\Illuminate\Database\Eloquent\Model>  $model
+     * @param  string  $function
+     * @param  \Illuminate\Database\Query\Expression|string|null  $column
+     * @param  \Illuminate\Database\Query\Expression|string  $groupBy
+     * @return \Laravel\Nova\Metrics\PartitionResult
+     */
+    protected function aggregate($request, $model, $function, $column, $groupBy)
+    {
+        $query = $model instanceof Builder ? $model : (new $model)->newQuery();
+        $grammar = $query->getQuery()->getGrammar();
+
+        $wrappedColumn = $grammar->wrap($column ?? $query->getModel()->getQualifiedKeyName());
+
+        $results = $query->select(
+            $groupBy, DB::raw("{$function}({$wrappedColumn}) as aggregate")
+        )->tap(function ($query) use ($request) {
+            return $this->applyFilterQuery($request, $query);
+        })->groupBy($groupBy)->get();
+
+        return $this->result($results->mapWithKeys(function ($result) use ($grammar, $groupBy) {
+            return $this->formatAggregateResult(
+                $result,
+                $groupBy instanceof Expression ? $grammar->getValue($groupBy) : $groupBy
+            );
+        })->all());
+    }
+
+    /**
+     * Format the aggregate result for the partition.
+     *
+     * @param  \Illuminate\Database\Eloquent\Model  $result
+     * @param  string  $groupBy
+     * @return array<string|int, int|float>
+     */
+    protected function formatAggregateResult($result, $groupBy)
+    {
+        $key = with($result->{last(explode('.', $groupBy))}, function ($key) {
+            return Util::value($key);
+        });
+
+        if (! is_int($key)) {
+            $key = (string) $key;
+        }
+
+        return [$key => $result->aggregate ?? 0];
+    }
+
+    /**
+     * Create a new partition metric result.
+     *
+     * @param  array<string, int|float>  $value
+     * @return \Laravel\Nova\Metrics\PartitionResult
+     */
+    public function result(array $value)
+    {
+        return new PartitionResult(collect($value)->map(function ($number) {
+            return round($number, $this->roundingPrecision, $this->roundingMode);
+        })->toArray());
+    }
+}