Added cancel previous input hook.

src/org/april/hebdobot/bot/Hebdobot.java

@@ -27,6 +27,7 @@ import java.time.LocalTime;
 import org.apache.commons.lang3.StringUtils;
 import org.april.hebdobot.HebdobotException;
 import org.april.hebdobot.bot.hooks.BadCommandHook;
+import org.april.hebdobot.bot.hooks.CancelPreviousInputHook;
 import org.april.hebdobot.bot.hooks.CollectiveSubjectHook;
 import org.april.hebdobot.bot.hooks.CommentHook;
 import org.april.hebdobot.bot.hooks.CurrentHook;
@@ -147,6 +148,7 @@ public class Hebdobot extends PircBot
         this.hooker.add(new StopReviewHook());
         this.hooker.add(new StatsHook());
         this.hooker.add(new StatusHook());
+        this.hooker.add(new CancelPreviousInputHook());
 
         this.hooker.add(new DateHook());
         this.hooker.add(new HelloHook());

src/org/april/hebdobot/bot/hooks/CancelPreviousInputHook.java

@@ -0,0 +1,82 @@
+/**
+ * Copyright (C) 2019-2021 Christian Pierre MOMON <cmomon@april.org>
+ *
+ * This file is part of (April) Hebdobot.
+ *
+ * Hebdobot is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Hebdobot is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Hebdobot.  If not, see <http://www.gnu.org/licenses/>
+ */
+package org.april.hebdobot.bot.hooks;
+
+import org.apache.commons.lang3.StringUtils;
+import org.april.hebdobot.bot.Hebdobot;
+import org.april.hebdobot.bot.review.Topic;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * The Class CancelPreviousInputHook.
+ */
+public class CancelPreviousInputHook extends Hook
+{
+    private static final Logger logger = LoggerFactory.getLogger(CancelPreviousInputHook.class);
+
+    /* (non-Javadoc)
+     * @see org.april.hebdobot.bot.hooks.Hook#attemptProcess(org.april.hebdobot.bot.Hebdobot, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String)
+     */
+    @Override
+    public boolean attemptProcess(final Hebdobot bot, final String channel, final String sender, final String login, final String hostname,
+            final String message)
+    {
+        boolean result;
+
+        if (StringUtils.equalsIgnoreCase(message, "!manquants"))
+        {
+            logger.info("!manquants caught.");
+
+            // Missing.
+            if (bot.getReview() == null)
+            {
+                bot.sendMessage(sender + ", pas de revue en cours.");
+            }
+            else
+            {
+                Topic topic = bot.getReview().getCurrentTopic();
+                if (topic == null)
+                {
+                    bot.sendMessage("Pas de sujet en cours.");
+                }
+                else
+                {
+                    if (bot.getReview().getParticipants().contains(sender))
+                    {
+                        topic.cancelPreviousMessage(sender);
+                    }
+                    else
+                    {
+                        bot.sendMessage("Vous n'avez pas d'entrée en cours.");
+                    }
+                }
+            }
+
+            result = true;
+        }
+        else
+        {
+            result = false;
+        }
+
+        //
+        return result;
+    }
+}

src/org/april/hebdobot/bot/review/CollectiveTopic.java

@@ -52,6 +52,19 @@ public class CollectiveTopic extends Topic
         this.messages.add(message);
     }
 
+    /* (non-Javadoc)
+     * @see org.april.hebdobot.bot.review.Topic#cancelPrevious(java.lang.String)
+     */
+    @Override
+    public void cancelPreviousMessage(final String author)
+    {
+        Message previousMessage = this.messages.getByAuthor(author).getLast();
+        if (previousMessage != null)
+        {
+            this.messages.remove(previousMessage);
+        }
+    }
+
     /**
      * Gets the messages.
      *

src/org/april/hebdobot/bot/review/IndividualTopic.java

@@ -58,6 +58,19 @@ public class IndividualTopic extends Topic
         this.messages.get(author).add(message);
     }
 
+    /* (non-Javadoc)
+     * @see org.april.hebdobot.bot.review.Topic#cancelPrevious(java.lang.String)
+     */
+    @Override
+    public void cancelPreviousMessage(final String participant)
+    {
+        Messages authorMessages = this.messages.get(participant);
+        if (authorMessages != null)
+        {
+            authorMessages.removeLast();
+        }
+    }
+
     /**
      * Gets the messages.
      *

src/org/april/hebdobot/bot/review/Messages.java

@@ -1,5 +1,5 @@
 /**
- * Copyright (C) 2017-2018 Christian Pierre MOMON <cmomon@april.org>
+ * Copyright (C) 2017-2019 Christian Pierre MOMON <cmomon@april.org>
  *
  * This file is part of (April) Hebdobot.
  *
@@ -20,6 +20,8 @@ package org.april.hebdobot.bot.review;
 
 import java.util.LinkedList;
 
+import org.apache.commons.lang3.StringUtils;
+
 /**
  * The Class MessageLinkedList.
  */
@@ -34,4 +36,29 @@ public class Messages extends LinkedList<Message>
     {
         super();
     }
+
+    /**
+     * Gets the by author.
+     *
+     * @param author
+     *            the author
+     * @return the by author
+     */
+    public Messages getByAuthor(final String author)
+    {
+        Messages result;
+
+        result = new Messages();
+
+        for (Message message : this)
+        {
+            if (StringUtils.equals(message.getAuthor(), author))
+            {
+                result.add(message);
+            }
+        }
+
+        //
+        return result;
+    }
 }

src/org/april/hebdobot/bot/review/Topic.java

@@ -47,6 +47,14 @@ public abstract class Topic
      */
     public abstract void add(Message message);
 
+    /**
+     * Cancel previous.
+     *
+     * @param participant
+     *            the participant
+     */
+    public abstract void cancelPreviousMessage(final String participant);
+
     /**
      * Gets the participants.
      *