暂存

vendor/illuminate/http/Concerns/CanBePrecognitive.php

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+<?php
+
+namespace Illuminate\Http\Concerns;
+
+use Illuminate\Support\Collection;
+
+trait CanBePrecognitive
+{
+    /**
+     * Filter the given array of rules into an array of rules that are included in precognitive headers.
+     *
+     * @param  array  $rules
+     * @return array
+     */
+    public function filterPrecognitiveRules($rules)
+    {
+        if (! $this->headers->has('Precognition-Validate-Only')) {
+            return $rules;
+        }
+
+        $validateOnly = explode(',', $this->header('Precognition-Validate-Only'));
+
+        return (new Collection($rules))
+            ->filter(fn ($rule, $attribute) => $this->shouldValidatePrecognitiveAttribute($attribute, $validateOnly))
+            ->all();
+    }
+
+    /**
+     * Determine if the given attribute should be validated.
+     *
+     * @param  string  $attribute
+     * @param  array  $validateOnly
+     * @return bool
+     */
+    protected function shouldValidatePrecognitiveAttribute($attribute, $validateOnly)
+    {
+        foreach ($validateOnly as $pattern) {
+            $regex = '/^'.str_replace('\*', '[^.]+', preg_quote($pattern, '/')).'$/';
+
+            if (preg_match($regex, $attribute)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Determine if the request is attempting to be precognitive.
+     *
+     * @return bool
+     */
+    public function isAttemptingPrecognition()
+    {
+        return $this->header('Precognition') === 'true';
+    }
+
+    /**
+     * Determine if the request is precognitive.
+     *
+     * @return bool
+     */
+    public function isPrecognitive()
+    {
+        return $this->attributes->get('precognitive', false);
+    }
+}