Added oracle for lemmatizer

transition_machine/src/Oracle.cpp

@@ -382,6 +382,43 @@ void Oracle::createDatabase()
     return 0;
   })));
 
+  str2oracle.emplace("strategy_lemmatizer", std::unique_ptr<Oracle>(new Oracle(
+  [](Oracle *)
+  {
+  },
+  [](Config & c, Oracle *)
+  {
+    if (c.pastActions.size() == 0)
+      return std::string("MOVE lemmatizer_lookup 0");
+
+    std::string previousState = util::noAccentLower(c.pastActions.getElem(0).first);
+    std::string previousAction = util::noAccentLower(c.pastActions.getElem(0).second.name);
+    std::string newState;
+    int movement = 0;
+
+    if (previousState == "lemmatizer_rules")
+    {
+      newState = "lemmatizer_lookup";
+      movement = 1;
+    }
+    else if (previousAction == "notfound")
+    {
+      newState = "lemmatizer_rules";
+      movement = 0;
+    }
+    else
+    {
+      newState = "lemmatizer_lookup";
+      movement = 1;
+    }
+
+    return "MOVE " + newState + " " + std::to_string(movement);
+  },
+  [](Config &, Oracle *, const std::string &)
+  {
+    return 0;
+  })));
+
   str2oracle.emplace("strategy_tokenizer", std::unique_ptr<Oracle>(new Oracle(
   [](Oracle *)
   {