Merge pull request #780 from addo37/improve-token-fetch

Add customization options for command processing

TelegramBots.wiki/abilities/Advanced.md

@@ -33,5 +33,35 @@ As an example, if you want to restrict the updates to photos only, then you may
   }
 ```
 
+## Custom Command Processing
+### Command Prefix
+Customizing the command prefix is as simple as overriding the `getCommandPrefix` method as shown below.
+```java
+@Override
+protected String getCommandPrefix() {
+  return "!";
+}
+```
+
+### Command Regex Split
+The method that the bot uses to capture command tokens is through the regex splitters. By default, it's set to `" "`. However, this can be customized. For example,
+if you'd like to split on digits and whitespaces, then you may do the following: 
+```java
+@Override
+protected String getCommandRegexSplit() {
+  return "\\s\\d";
+}
+```
+### Commands with Continuous Text
+Feeling ambitious? You may allow your bot to process tokens that are technically attached to your command. Imagine you have a command
+`/do` and you'd like users to send commands as `/do1` and still trigger the `do` ability. In order to do that, override the `allowContinuousText` function.
+```java
+@Override
+protected boolean allowContinuousText() {
+  return true;
+}
+```
+Please note that this may cause ability overlap. If multiple abilities can match the same command, the longest match will be taken. For example, 
+if you have two abilities `do` and `do1`, the command `/do1` will trigger the `do1` ability. 
 ## Statistics
 AbilityBot can accrue basic statistics about the usage of your abilities and replies. Simply `enableStats()` on an Ability builder or `enableStats(<name>)` on replies to activate this feature. Once activated, you may call `/stats` and the bot will print a basic list of statistics. At the moment, AbilityBot only tracks hits. In the future, this will be enhanced to track more stats.

telegrambots-abilities/src/main/java/org/telegram/abilitybots/api/bot/BaseAbilityBot.java

@@ -260,6 +260,18 @@ public abstract class BaseAbilityBot extends DefaultAbsSender implements Ability
         return true;
     }
 
+    protected String getCommandPrefix() {
+        return "/";
+    }
+
+    protected String getCommandRegexSplit() {
+        return " ";
+    }
+
+    protected boolean allowContinuousText() {
+        return false;
+    }
+
     /**
      * Registers the declared abilities using method reflection. Also, replies are accumulated using the built abilities and standalone methods that return a Reply.
      * <p>
@@ -501,17 +513,27 @@ public abstract class BaseAbilityBot extends DefaultAbsSender implements Ability
         if (!update.hasMessage() || !msg.hasText())
             return Trio.of(update, abilities.get(DEFAULT), new String[]{});
 
-        String[] tokens = msg.getText().split(" ");
-
-        if (tokens[0].startsWith("/")) {
-            String abilityToken = stripBotUsername(tokens[0].substring(1)).toLowerCase();
-            Ability ability = abilities.get(abilityToken);
-            tokens = Arrays.copyOfRange(tokens, 1, tokens.length);
-            return Trio.of(update, ability, tokens);
+        Ability ability;
+        String[] tokens;
+        if (allowContinuousText()) {
+            String abName = abilities.keySet().stream()
+                .filter(name -> msg.getText().startsWith(format("%s%s", getCommandPrefix(), name)))
+                .findFirst().orElse(DEFAULT);
+            tokens = msg.getText()
+                .replaceFirst(getCommandPrefix() + abName, "")
+                .split(getCommandRegexSplit());
+            ability = abilities.get(abName);
         } else {
-            Ability ability = abilities.get(DEFAULT);
-            return Trio.of(update, ability, tokens);
+            tokens = msg.getText().split(getCommandRegexSplit());
+            if (tokens[0].startsWith(getCommandPrefix())) {
+                String abilityToken = stripBotUsername(tokens[0].substring(1)).toLowerCase();
+                ability = abilities.get(abilityToken);
+                tokens = Arrays.copyOfRange(tokens, 1, tokens.length);
+            } else {
+                ability = abilities.get(DEFAULT);
+            }
         }
+        return Trio.of(update, ability, tokens);
     }
 
     private String stripBotUsername(String token) {

telegrambots-abilities/src/test/java/org/telegram/abilitybots/api/bot/ContinuousTextTest.java

@@ -0,0 +1,102 @@
+package org.telegram.abilitybots.api.bot;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.telegram.abilitybots.api.db.DBContext;
+import org.telegram.abilitybots.api.objects.Ability;
+import org.telegram.abilitybots.api.sender.SilentSender;
+import org.telegram.telegrambots.meta.api.objects.Update;
+import org.telegram.telegrambots.meta.api.objects.User;
+
+import java.io.IOException;
+
+import static org.apache.commons.lang3.StringUtils.EMPTY;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.internal.verification.VerificationModeFactory.times;
+import static org.telegram.abilitybots.api.bot.TestUtils.mockFullUpdate;
+import static org.telegram.abilitybots.api.db.MapDBContext.offlineInstance;
+import static org.telegram.abilitybots.api.objects.Ability.builder;
+import static org.telegram.abilitybots.api.objects.Locality.ALL;
+import static org.telegram.abilitybots.api.objects.Privacy.PUBLIC;
+
+public class ContinuousTextTest {
+  private static final User USER = new User(1, "first", false, "last", "username", null);
+
+  private DBContext db;
+
+  private SilentSender silent;
+  private ContinuousTextBot bot;
+
+  @BeforeEach
+  void setUp() {
+    db = offlineInstance("db");
+    bot = new ContinuousTextBot(EMPTY, EMPTY, db);
+    silent = mock(SilentSender.class);
+    bot.silent = silent;
+  }
+
+  @AfterEach
+  void tearDown() throws IOException {
+    db.clear();
+    db.close();
+  }
+
+  @Test
+  void processesContinuousText() {
+    Update update = mockFullUpdate(bot, USER, "/do2");
+
+    bot.onUpdateReceived(update);
+
+    verify(silent, times(1))
+        .send("2", USER.getId());
+  }
+
+  @Test
+  void matchesLongestAbilityName() {
+    Update update = mockFullUpdate(bot, USER, "/do1");
+
+    bot.onUpdateReceived(update);
+
+    verify(silent, times(1))
+        .send("longer ability name", USER.getId());
+  }
+
+  public static class ContinuousTextBot extends AbilityBot {
+
+    public ContinuousTextBot(String token, String username, DBContext db) {
+      super(token, username, db);
+    }
+
+    @Override
+    public int creatorId() {
+      return 1337;
+    }
+
+    @Override
+    protected boolean allowContinuousText() {
+      return true;
+    }
+
+    public Ability continuousTextAbility() {
+      return builder()
+          .name("do")
+          .privacy(PUBLIC)
+          .locality(ALL)
+          .input(0)
+          .action(ctx -> silent.send(ctx.firstArg(), ctx.chatId()))
+          .build();
+    }
+
+    public Ability continuousTextSimilarAbility() {
+      return builder()
+          .name("do1")
+          .privacy(PUBLIC)
+          .locality(ALL)
+          .input(0)
+          .action(ctx -> silent.send("longer ability name", ctx.chatId()))
+          .build();
+    }
+  }
+}