refactored the managers

src/singletons/completionmanager.cpp

@@ -0,0 +1,28 @@
+#include "singletons/completionmanager.hpp"
+#include "common.hpp"
+#include "debug/log.hpp"
+#include "singletons/channelmanager.hpp"
+#include "singletons/emotemanager.hpp"
+
+namespace chatterino {
+
+CompletionManager &CompletionManager::getInstance()
+{
+    static CompletionManager instance;
+    return instance;
+}
+
+CompletionModel *CompletionManager::createModel(const std::string &channelName)
+{
+    auto it = this->models.find(channelName);
+    if (it != this->models.end()) {
+        return it->second;
+    }
+
+    CompletionModel *ret = new CompletionModel(qS(channelName));
+    this->models[channelName] = ret;
+
+    return ret;
+}
+
+}  // namespace chatterino