Ladybird/Android: Enable content filters and Autoplay allowlist

Copy these over from the standard main.cpp for WebContent. The ideas are
already starting to come together on how to unify these main files.

Ladybird/Android/src/main/cpp/WebContentService.cpp

@@ -20,8 +20,10 @@
 #include <LibJS/Bytecode/Interpreter.h>
 #include <LibWeb/Bindings/MainThreadVM.h>
 #include <LibWeb/HTML/Window.h>
+#include <LibWeb/Loader/ContentFilter.h>
 #include <LibWeb/Loader/FrameLoader.h>
 #include <LibWeb/Loader/ResourceLoader.h>
+#include <LibWeb/PermissionsPolicy/AutoplayAllowlist.h>
 #include <LibWeb/Platform/AudioCodecPluginAgnostic.h>
 #include <LibWeb/Platform/EventLoopPluginSerenity.h>
 #include <LibWebView/RequestServerAdapter.h>
@@ -42,6 +44,9 @@ static ErrorOr<NonnullRefPtr<Protocol::WebSocketClient>> bind_web_socket_service
     return bind_service<Protocol::WebSocketClient>(&bind_web_socket_java);
 }
 
+static ErrorOr<void> load_content_filters();
+static ErrorOr<void> load_autoplay_allowlist();
+
 ErrorOr<int> service_main(int ipc_socket, int fd_passing_socket)
 {
     Core::EventLoop event_loop;
@@ -73,6 +78,14 @@ ErrorOr<int> service_main(int ipc_socket, int fd_passing_socket)
 
     TRY(Web::Bindings::initialize_main_thread_vm());
 
+    auto maybe_content_filter_error = load_content_filters();
+    if (maybe_content_filter_error.is_error())
+        dbgln("Failed to load content filters: {}", maybe_content_filter_error.error());
+
+    auto maybe_autoplay_allowlist_error = load_autoplay_allowlist();
+    if (maybe_autoplay_allowlist_error.is_error())
+        dbgln("Failed to load autoplay allowlist: {}", maybe_autoplay_allowlist_error.error());
+
     auto webcontent_socket = TRY(Core::LocalSocket::adopt_fd(ipc_socket));
     auto webcontent_client = TRY(WebContent::ConnectionFromClient::try_create(move(webcontent_socket)));
     webcontent_client->set_fd_passing_socket(TRY(Core::LocalSocket::adopt_fd(fd_passing_socket)));
@@ -106,3 +119,61 @@ static ErrorOr<NonnullRefPtr<Client>> bind_service(void (*bind_method)(int, int)
 
     return new_client;
 }
+
+static ErrorOr<void> load_content_filters()
+{
+    auto file_or_error = Core::File::open(DeprecatedString::formatted("{}/home/anon/.config/BrowserContentFilters.txt", s_serenity_resource_root), Core::File::OpenMode::Read);
+    if (file_or_error.is_error())
+        file_or_error = Core::File::open(DeprecatedString::formatted("{}/res/ladybird/BrowserContentFilters.txt", s_serenity_resource_root), Core::File::OpenMode::Read);
+    if (file_or_error.is_error())
+        return file_or_error.release_error();
+
+    auto file = file_or_error.release_value();
+    auto ad_filter_list = TRY(Core::InputBufferedFile::create(move(file)));
+    auto buffer = TRY(ByteBuffer::create_uninitialized(4096));
+
+    Vector<String> patterns;
+
+    while (TRY(ad_filter_list->can_read_line())) {
+        auto line = TRY(ad_filter_list->read_line(buffer));
+        if (line.is_empty())
+            continue;
+
+        auto pattern = TRY(String::from_utf8(line));
+        TRY(patterns.try_append(move(pattern)));
+    }
+
+    auto& content_filter = Web::ContentFilter::the();
+    TRY(content_filter.set_patterns(patterns));
+
+    return {};
+}
+
+static ErrorOr<void> load_autoplay_allowlist()
+{
+    auto file_or_error = Core::File::open(TRY(String::formatted("{}/home/anon/.config/BrowserAutoplayAllowlist.txt", s_serenity_resource_root)), Core::File::OpenMode::Read);
+    if (file_or_error.is_error())
+        file_or_error = Core::File::open(TRY(String::formatted("{}/res/ladybird/BrowserAutoplayAllowlist.txt", s_serenity_resource_root)), Core::File::OpenMode::Read);
+    if (file_or_error.is_error())
+        return file_or_error.release_error();
+
+    auto file = file_or_error.release_value();
+    auto allowlist = TRY(Core::InputBufferedFile::create(move(file)));
+    auto buffer = TRY(ByteBuffer::create_uninitialized(4096));
+
+    Vector<String> origins;
+
+    while (TRY(allowlist->can_read_line())) {
+        auto line = TRY(allowlist->read_line(buffer));
+        if (line.is_empty())
+            continue;
+
+        auto domain = TRY(String::from_utf8(line));
+        TRY(origins.try_append(move(domain)));
+    }
+
+    auto& autoplay_allowlist = Web::PermissionsPolicy::AutoplayAllowlist::the();
+    TRY(autoplay_allowlist.enable_for_origins(origins));
+
+    return {};
+}