avatar and header-image settings

assets/css/activitypub-admin.css

@@ -155,3 +155,24 @@ summary {
 input.blog-user-identifier {
 	text-align: right;
 }
+
+.activitypub-settings-body
+.header-image {
+	width: 100%;
+	height: 80px;
+	position: relative;
+	display: block;
+	margin-bottom: 40px;
+	background-image: rgb(168,165,175);
+	background-image: linear-gradient(180deg, red, yellow);
+	background-size: cover;
+}
+
+.activitypub-settings-body
+.logo {
+	height: 80px;
+	width: 80px;
+	position: relative;
+	top: 40px;
+	left: 40px;
+}

includes/class-activitypub.php

@@ -28,6 +28,8 @@ class Activitypub {
 		\add_action( 'untrash_post', array( self::class, 'untrash_post' ), 1 );
 
 		\add_action( 'init', array( self::class, 'add_rewrite_rules' ) );
+
+		\add_action( 'after_setup_theme', array( self::class, 'theme_compat' ), 99 );
 	}
 
 	/**
@@ -242,4 +244,31 @@ class Activitypub {
 		self::add_rewrite_rules();
 		\flush_rewrite_rules();
 	}
+
+	public static function theme_compat() {
+		$site_icon = get_theme_support( 'custom-logo' );
+
+		if ( ! $site_icon ) {
+			// custom logo support
+			add_theme_support(
+				'custom-logo',
+				array(
+					'height' => 80,
+					'width'  => 80,
+				)
+			);
+		}
+
+		$custom_header = get_theme_support( 'custom-header' );
+
+		if ( ! $custom_header ) {
+			// This theme supports a custom header
+			$custom_header_args = array(
+				'width'       => 1250,
+				'height'      => 600,
+				'header-text' => true,
+			);
+			add_theme_support( 'custom-header', $custom_header_args );
+		}
+	}
 }

templates/settings.php

@@ -32,7 +32,25 @@
 
 		<h3><?php \esc_html_e( 'Blog-User', 'activitypub' ); ?></h3>
 
-		<p><?php \esc_html_e( 'All activity related settings.', 'activitypub' ); ?></p>
+		<p><?php \esc_html_e( 'All settings for the Blog-User (Catch-All Account)', 'activitypub' ); ?></p>
+
+		<table class="form-table" id="activitypub-images">
+			<tbody>
+				<tr>
+					<th scope="row">
+						<?php \esc_html_e( 'Cover & Avatar', 'activitypub' ); ?>
+					</th>
+					<td>
+						<div class="header-image" style="background-image: url('<?php echo esc_url( get_header_image() ); ?>');">
+							<img class="logo" src="<?php echo get_site_icon_url(); ?>" />
+						</div>
+						<p class="description">
+							<?php esc_html_e( 'Change cover and avatar in the customizer.', 'activitypub' ); ?>
+						</p>
+					</td>
+				</tr>
+			</tbody>
+		</table>
 
 		<table class="form-table">
 			<tbody>