Migrate /color command to Helix API (#3988)

src/util/Twitch.cpp

@@ -1,16 +1,37 @@
 #include "util/Twitch.hpp"
 
+#include "util/QStringHash.hpp"
+
 #include <QDesktopServices>
 #include <QUrl>
 
+#include <unordered_map>
+
 namespace chatterino {
 
 namespace {
 
     const auto TWITCH_USER_LOGIN_PATTERN = R"(^[a-z0-9]\w{0,24}$)";
 
+    // Remember to keep VALID_HELIX_COLORS up-to-date if a new color is implemented to keep naming for users consistent
+    const std::unordered_map<QString, QString> HELIX_COLOR_REPLACEMENTS{
+        {"blueviolet", "blue_violet"},   {"cadetblue", "cadet_blue"},
+        {"dodgerblue", "dodger_blue"},   {"goldenrod", "golden_rod"},
+        {"hotpink", "hot_pink"},         {"orangered", "orange_red"},
+        {"seagreen", "sea_green"},       {"springgreen", "spring_green"},
+        {"yellowgreen", "yellow_green"},
+    };
+
 }  // namespace
 
+// Colors retreived from https://dev.twitch.tv/docs/api/reference#update-user-chat-color 2022-09-11
+// Remember to keep HELIX_COLOR_REPLACEMENTS up-to-date if a new color is implemented to keep naming for users consistent
+extern const QStringList VALID_HELIX_COLORS{
+    "blue",        "blue_violet", "cadet_blue", "chocolate",    "coral",
+    "dodger_blue", "firebrick",   "golden_rod", "green",        "hot_pink",
+    "orange_red",  "red",         "sea_green",  "spring_green", "yellow_green",
+};
+
 void openTwitchUsercard(QString channel, QString username)
 {
     QDesktopServices::openUrl("https://www.twitch.tv/popout/" + channel +
@@ -57,4 +78,17 @@ QRegularExpression twitchUserLoginRegexp()
     return re;
 }
 
+void cleanHelixColorName(QString &color)
+{
+    color = color.toLower();
+    auto it = HELIX_COLOR_REPLACEMENTS.find(color);
+
+    if (it == HELIX_COLOR_REPLACEMENTS.end())
+    {
+        return;
+    }
+
+    color = it->second;
+}
+
 }  // namespace chatterino