Implement "set" subcommand

src/main/java/wtf/beatrice/nounspicker/commands/NounsCommand.java

@@ -5,6 +5,7 @@ import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.jetbrains.annotations.NotNull;
 import wtf.beatrice.nounspicker.NounsPicker;
+import wtf.beatrice.nounspicker.commands.subcommands.NounsSetSubCommand;
 
 public class NounsCommand implements CommandExecutor
 {
@@ -28,6 +29,12 @@ public class NounsCommand implements CommandExecutor
             return true;
         }
 
+        switch(args[0].toLowerCase())
+        {
+            case "set":
+                return NounsSetSubCommand.run(sender, args);
+        }
+
 
         return false;
     }

src/main/java/wtf/beatrice/nounspicker/commands/subcommands/NounsSetSubCommand.java

@@ -0,0 +1,38 @@
+package wtf.beatrice.nounspicker.commands.subcommands;
+
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+import wtf.beatrice.nounspicker.objects.Cache;
+
+public class NounsSetSubCommand
+{
+    public static boolean run(@NotNull CommandSender sender,
+                    @NotNull String[] args)
+    {
+
+        if(args.length < 3)
+        {
+            sender.sendMessage("usage: /nouns set <main> <secondary>");
+            return true;
+        }
+
+        String mainPronoun = args[1].toLowerCase();
+        String secondaryPronoun = args[2].toLowerCase();
+
+        if(!Cache.isPronounValid(mainPronoun))
+        {
+            sender.sendMessage("Invalid main pronoun!");
+            return true;
+        }
+
+        if(!Cache.isPronounValid(secondaryPronoun))
+        {
+            sender.sendMessage("Invalid secondary pronoun!");
+            return true;
+        }
+
+        // todo: add to sqlite
+
+        return true;
+    }
+}

src/main/java/wtf/beatrice/nounspicker/objects/Cache.java

@@ -0,0 +1,28 @@
+package wtf.beatrice.nounspicker.objects;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.HashMap;
+
+public class Cache
+{
+
+    // map to store pronouns' "raw" names and how they appear in game.
+    private static final HashMap<String, String> pronouns = new HashMap<>();
+
+    public static @Nullable String getPronoun(String pronoun)
+    {
+        return pronouns.get(pronoun);
+    }
+
+    public static void addPronoun(@NotNull String pronoun, @NotNull String appearance)
+    {
+        pronouns.put(pronoun, appearance);
+    }
+
+    public static boolean isPronounValid(String pronoun)
+    {
+        return getPronoun(pronoun) != null;
+    }
+}