Entry summary prototype

lib/Parser/XML/Entry.php

@@ -105,12 +105,14 @@ class Entry extends Construct implements \MensBeam\Lax\Parser\Entry {
     public function getContent(): ?Text {
         return $this->fetchAtomText("atom:content")                     // Atom content
             ?? $this->fetchText("enc:encoded", self::TEXT_HTML)         // Explicitly encoded HTML content
-            ?? $this->fetchText("rss1:description", self::TEXT_LOOSE)   //  RSS 1.0 ambiguous text
-            ?? $this->fetchText("rss2:description", self::TEXT_LOOSE);  //  RSS 2.0 ambiguous text
+            ?? $this->fetchText("rss1:description", self::TEXT_LOOSE)   // RSS 1.0 ambiguous text
+            ?? $this->fetchText("rss2:description", self::TEXT_LOOSE);  // RSS 2.0 ambiguous text
     }
 
     public function getSummary(): ?Text {
-        return null;
+        return $this->fetchAtomText("atom:summary")                     // Atom summary
+            ?? $this->fetchText("gplay:description", self::TEXT_PLAIN)  // Google Play podcast description
+            ?? $this->fetchText("apple:summary", self::TEXT_PLAIN);     // iTunes podcast summary
     }
 
     public function getBanner(): ?Url {