Minor corrections

lib/Date.php

@@ -49,7 +49,7 @@ class Date extends \DateTimeImmutable implements \JsonSerializable {
         "D, d M y H:i:s",
     ];
 
-    protected static function create(\DateTimeInterface $temp) : self {
+    protected static function create(\DateTimeInterface $temp): self {
         if (version_compare(\PHP_VERSION, "7.1", ">=")) {
             return (new self)->setTimestamp($temp->getTimestamp())->setTimezone($temp->getTimezone())->setTime((int) $temp->format("H"), (int) $temp->format("i"), (int) $temp->format("s"), (int) $temp->format("u"));
         } else {
@@ -61,28 +61,19 @@ class Date extends \DateTimeImmutable implements \JsonSerializable {
         parent::__construct($time, $timezone);
     }
 
-    public static function createFromFormat($format , $time, $timezone = null) {
+    public static function createFromFormat($format, $time, $timezone = null): ?self {
         $temp = parent::createFromFormat("!".$format, $time, $timezone);
-        if (!$temp) {
-            return $temp;
-        }
-        return static::create($temp);
+        return $temp ? static::create($temp) : null;
     }
 
     public static function createFromMutable($datetime) {
         $temp = parent::createFromMutable($datetime);
-        if (!$temp) {
-            return $temp;
-        }
-        return static::create($temp);
+        return $temp ? static::create($temp) : null;
     }
 
     public static function createFromImmutable($datetime) {
         $temp = \DateTime::createFromImmutable($datetime);
-        if (!$temp) {
-            return $temp;
-        }
-        return static::create($temp);
+        return $temp ? static::create($temp) : null;
     }
 
     public function __toString() {

lib/Feed.php

@@ -6,6 +6,9 @@
 declare(strict_types=1);
 namespace JKingWeb\Lax;
 
+use JKingWeb\Lax\Category\Collection as CategoryCollection;
+use JKingWeb\Lax\Person\Collection as PersonCollection;
+
 /** Represents a news feed, in arbitrary format
  * 
  * All properties may be null.
@@ -60,6 +63,11 @@ class Feed {
     /** @var \JKingWeb\Lax\Metadata $meta A collection of metadata not contained in the feed itself, usually from HTTP */
     public $meta;
 
+    public function __construct() {
+        $this->people = new PersonCollection;
+        $this->categories = new CategoryCollection;
+    }
+    
     /** Parses a string to produce a Feed object
      * 
      * Most users will probably rather want the Feed::fetch() method

lib/Parser/JSON/Feed.php

@@ -122,8 +122,8 @@ class Feed implements \JKingWeb\Lax\Parser\Feed {
     }
 
     /** General function to fetch a collection of people associated with a feed */
-    public function getPeople(): ?PersonCollection {
-        return $this->getAuthorsV1() ?? $this->getAuthorV1();
+    public function getPeople(): PersonCollection {
+        return $this->getAuthorsV1() ?? $this->getAuthorV1() ?? new PersonCollection;
     }
 
     /** General function to fetch the modification date of a feed