feat: add filter for external badges (#6709)

Co-authored-by: Ava Chow <github@achow101.com>
Reviewed-by: Nerixyz <nerixdev@outlook.de>

src/controllers/filters/lang/Filter.cpp

@@ -12,6 +12,7 @@ namespace chatterino::filters {
 
 const QMap<QString, Type> MESSAGE_TYPING_CONTEXT{
     {"author.badges", Type::StringList},
+    {"author.external_badges", Type::StringList},
     {"author.color", Type::Color},
     {"author.name", Type::String},
     {"author.user_id", Type::String},
@@ -49,16 +50,17 @@ ContextMap buildContextMap(const MessagePtr &m, chatterino::Channel *channel)
 {
     auto watchingChannel = getApp()->getTwitch()->getWatchingChannel().get();
 
-    /* 
-     * Looking to add a new identifier to filters? Here's what to do: 
-     *  1. Update validIdentifiersMap in Tokenizer.cpp
+    /*
+     * Looking to add a new identifier to filters? Here's what to do:
+     *  1. Update VALID_IDENTIFIERS_MAP in Tokenizer.cpp
      *  2. Add the identifier to the list below
-     *  3. Add the type of the identifier to MESSAGE_TYPING_CONTEXT in Filter.hpp
+     *  3. Add the type of the identifier to MESSAGE_TYPING_CONTEXT at the top of this file
      *  4. Add the value for the identifier to the ContextMap returned by this function
-     * 
+     *
      * List of identifiers:
      *
      * author.badges
+     * author.external_badges
      * author.color
      * author.name
      * author.user_id
@@ -121,6 +123,7 @@ ContextMap buildContextMap(const MessagePtr &m, chatterino::Channel *channel)
     }
     ContextMap vars = {
         {"author.badges", std::move(badges)},
+        {"author.external_badges", m->externalBadges},
         {"author.color", m->usernameColor},
         {"author.name", m->displayName},
         {"author.user_id", m->userID},

src/controllers/filters/lang/Tokenizer.cpp

@@ -18,6 +18,7 @@ namespace chatterino::filters {
 
 const QMap<QString, QString> VALID_IDENTIFIERS_MAP{
     {"author.badges", "author badges"},
+    {"author.external_badges", "author external badges"},
     {"author.color", "author color"},
     {"author.name", "author name"},
     {"author.user_id", "author user id"},