From cc2672fb0ab8d4a545388de59c12919adeb10a24 Mon Sep 17 00:00:00 2001
From: "J. King" <jking@jkingweb.ca>
Date: Tue, 26 Jan 2021 12:03:26 -0500
Subject: [PATCH] Improve icon fetching interface

---
 lib/Database.php                            | 6 +++++-
 tests/cases/Database/SeriesSubscription.php | 7 +++----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/Database.php b/lib/Database.php
index bdb36b6..f8053ae 100644
--- a/lib/Database.php
+++ b/lib/Database.php
@@ -991,12 +991,14 @@ class Database {
      * - "url": The URL of the icon
      * - "type": The Content-Type of the icon e.g. "image/png"
      * - "data": The icon itself, as a binary sring; if $withData is false this will be null
+     * 
+     * If the subscription has no icon null is returned instead of an array
      *
      * @param string|null $user The user who owns the subscription being queried; using null here is supported for TT-RSS and SHOULD NOT be used elsewhere as it leaks information
      * @param int $subscription The numeric identifier of the subscription
      * @param bool $includeData Whether to include the binary data of the icon itself in the result
      */
-    public function subscriptionIcon(?string $user, int $id, bool $includeData = true): array {
+    public function subscriptionIcon(?string $user, int $id, bool $includeData = true): ?array {
         $data = $includeData ? "i.data" : "null as data";
         $q = new Query("SELECT i.id, i.url, i.type, $data from arsse_subscriptions as s join arsse_feeds as f on s.feed = f.id left join arsse_icons as i on f.icon = i.id");
         $q->setWhere("s.id = ?", "int", $id);
@@ -1006,6 +1008,8 @@ class Database {
         $out = $this->db->prepare($q->getQuery(), $q->getTypes())->run($q->getValues())->getRow();
         if (!$out) {
             throw new Db\ExceptionInput("subjectMissing", ["action" => __FUNCTION__, "field" => "subscription", 'id' => $id]);
+        } elseif (!$out['id']) {
+            return null;
         }
         return $out;
     }
diff --git a/tests/cases/Database/SeriesSubscription.php b/tests/cases/Database/SeriesSubscription.php
index c009b60..e4a2b09 100644
--- a/tests/cases/Database/SeriesSubscription.php
+++ b/tests/cases/Database/SeriesSubscription.php
@@ -478,7 +478,7 @@ trait SeriesSubscription {
         $exp = "http://example.com/favicon.ico";
         $this->assertSame($exp, Arsse::$db->subscriptionIcon(null, 1)['url']);
         $this->assertSame($exp, Arsse::$db->subscriptionIcon(null, 2)['url']);
-        $this->assertSame(null, Arsse::$db->subscriptionIcon(null, 3)['url']);
+        $this->assertSame(null, Arsse::$db->subscriptionIcon(null, 3));
     }
 
     public function testRetrieveTheFaviconOfAMissingSubscription(): void {
@@ -490,16 +490,15 @@ trait SeriesSubscription {
         $exp = "http://example.com/favicon.ico";
         $user = "john.doe@example.com";
         $this->assertSame($exp, Arsse::$db->subscriptionIcon($user, 1)['url']);
-        $this->assertSame(null, Arsse::$db->subscriptionIcon($user, 3)['url']);
+        $this->assertSame(null, Arsse::$db->subscriptionIcon($user, 3));
         $user = "jane.doe@example.com";
         $this->assertSame($exp, Arsse::$db->subscriptionIcon($user, 2)['url']);
     }
 
     public function testRetrieveTheFaviconOfASubscriptionOfTheWrongUser(): void {
-        $exp = "http://example.com/favicon.ico";
         $user = "john.doe@example.com";
         $this->assertException("subjectMissing", "Db", "ExceptionInput");
-        $this->assertSame(null, Arsse::$db->subscriptionIcon($user, 2)['url']);
+        Arsse::$db->subscriptionIcon($user, 2);
     }
 
     public function testListTheTagsOfASubscription(): void {