Fix flags not tab-completing unless string is empty (#460)

Author: Pablete1234

cloud-core/src/main/java/cloud/commandframework/CommandTree.java

@@ -41,7 +41,6 @@
 import cloud.commandframework.permission.CommandPermission;
 import cloud.commandframework.permission.OrPermission;
 import cloud.commandframework.types.tuples.Pair;
-import io.leangen.geantyref.GenericTypeReflector;
 import io.leangen.geantyref.TypeToken;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -613,10 +612,6 @@ private CommandTree(final @NonNull CommandManager<C> commandManager) {
             if (!lastFlag.isPresent()) {
                 commandContext.remove(FlagArgument.FLAG_META_KEY);
             }
-        } else if (GenericTypeReflector.erase(child.getValue().getValueType().getType()).isArray()) {
-            while (commandQueue.size() > 1) {
-                commandQueue.remove();
-            }
         } else if (commandQueue.size() <= child.getValue().getParser().getRequestedArgumentCount()) {
             for (int i = 0; i < child.getValue().getParser().getRequestedArgumentCount() - 1
                     && commandQueue.size() > 1; i++) {
@@ -636,7 +631,7 @@ private CommandTree(final @NonNull CommandManager<C> commandManager) {
             } else if (child.getValue() instanceof CompoundArgument) {
                 return this.directSuggestions(commandContext, child, ((LinkedList<String>) commandQueue).getLast());
             }
-        } else if (commandQueue.size() == 1 && commandQueue.peek().isEmpty()) {
+        } else if (commandQueue.size() == 1) {
             return this.directSuggestions(commandContext, child, commandQueue.peek());
         }
 

cloud-core/src/test/java/cloud/commandframework/CommandSuggestionsTest.java

@@ -23,6 +23,7 @@
 //
 package cloud.commandframework;
 
+import cloud.commandframework.arguments.CommandArgument;
 import cloud.commandframework.arguments.compound.ArgumentTriplet;
 import cloud.commandframework.arguments.parser.ArgumentParseResult;
 import cloud.commandframework.arguments.standard.BooleanArgument;
@@ -37,8 +38,10 @@
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import org.junit.Ignore;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 
 import static cloud.commandframework.util.TestUtils.createManager;
@@ -635,6 +638,41 @@ void testFlagYieldingStringArrayWithLiberalFlagArgument() {
         assertThat(suggestions6).isEmpty();
     }
 
+    @Test
+    void testTextFlagCompletion() {
+        // Arrange
+        final CommandManager<TestCommandSender> manager = createManager();
+        manager.setSetting(CommandManager.ManagerSettings.LIBERAL_FLAG_PARSING, true);
+        manager.command(
+                manager.commandBuilder("command")
+                        .flag(manager.flagBuilder("flag").withAliases("f")
+                                .withArgument(EnumArgument.of(TestEnum.class, "test")).build())
+                        .flag(manager.flagBuilder("flog").build())
+        );
+
+        // Act
+        final List<String> suggestions1 = suggest(manager, "command ");
+        final List<String> suggestions2 = suggest(manager, "command --");
+        final List<String> suggestions3 = suggest(manager, "command --f");
+        final List<String> suggestions4 = suggest(manager, "command --fla");
+        final List<String> suggestions5 = suggest(manager, "command -f");
+        final List<String> suggestions6 = suggest(manager, "command -");
+
+        final List<String> suggestions7 = suggest(manager, "command -f ");
+        final List<String> suggestions8 = suggest(manager, "command -f b");
+
+        // Assert
+        assertThat(suggestions1).containsExactly("--flag", "--flog", "-f");
+        assertThat(suggestions2).containsExactly("--flag", "--flog");
+        assertThat(suggestions3).containsExactly("--flag", "--flog");
+        assertThat(suggestions4).containsExactly("--flag");
+        assertThat(suggestions5).containsExactly("-f");
+        assertThat(suggestions6).containsExactly("--flag", "--flog", "-f");
+        assertThat(suggestions7).containsExactly("foo", "bar");
+        assertThat(suggestions8).containsExactly("bar");
+    }
+
+
     private List<String> suggest(CommandManager<TestCommandSender> manager, String command) {
         return manager.suggest(new TestCommandSender(), command);
     }