Added version and help commands

Signed-off-by: Louis Vallat <louis@louis-vallat.xyz>

app/src/main/java/xyz/vallat/louis/commands/Aide.java

@@ -0,0 +1,30 @@
+package xyz.vallat.louis.commands;
+
+import discord4j.core.event.domain.message.MessageCreateEvent;
+import discord4j.rest.util.Color;
+import reactor.core.publisher.Mono;
+import xyz.vallat.louis.App;
+import xyz.vallat.louis.managers.discord.DiscordManager;
+
+import java.time.Instant;
+
+public class Aide extends Command {
+
+    public Aide(String name) {
+        super(name, "Un chouette menu d'aide.", name);
+    }
+
+    @Override
+    public Mono<Void> execute(MessageCreateEvent event) {
+        return event.getMessage().getChannel().flatMap(channel -> channel.createEmbed(embed -> {
+            DiscordManager.getCommands().forEach(c ->
+                    embed.addField(c.getName(), c.getDescription() + " Usage: " + c.getUsage(), false));
+            embed.setColor(Color.GREEN)
+                    .setTitle(App.NAME)
+                    .setDescription("Besoin d'aide ?")
+                    .setUrl("https://gitlab.com/lovallat/reminder-bot")
+                    .setFooter("Menu d'aide", null)
+                    .setTimestamp(Instant.now());
+        })).then().onErrorResume(t -> fatalError(event, t));
+    }
+}

app/src/main/java/xyz/vallat/louis/commands/Desinscription.java

@@ -14,7 +14,7 @@ public class Desinscription extends Command {
     public Mono<Void> execute(MessageCreateEvent event) {
         return event.getMessage().getChannel().flatMap(channel -> {
             if (event.getMessage().getAuthor().isEmpty() ||
-                    StudentManager.deleteFromSnowflake(event.getMessage().getAuthor().get().getId().asString()))
+                    !StudentManager.deleteFromSnowflake(event.getMessage().getAuthor().get().getId().asString()))
                 return channel.createMessage("On dirait que je ne t'ai pas dans ma base de données !");
             return channel.createMessage("C'est bon, tu n'es plus dans ma base de données ! :thumbs_up:");
         }).then().onErrorResume(t -> fatalError(event, t));

app/src/main/java/xyz/vallat/louis/commands/Version.java

@@ -0,0 +1,30 @@
+package xyz.vallat.louis.commands;
+
+import discord4j.core.event.domain.message.MessageCreateEvent;
+import discord4j.rest.util.Color;
+import reactor.core.publisher.Mono;
+import xyz.vallat.louis.App;
+import xyz.vallat.louis.managers.discord.DiscordManager;
+
+import java.time.Instant;
+
+public class Version extends Command {
+
+    public Version(String name) {
+        super(name, "Donne des informations sur la version de ce bot.", name);
+    }
+
+    @Override
+    public Mono<Void> execute(MessageCreateEvent event) {
+        return event.getMessage().getChannel().flatMap(channel -> channel.createEmbed(embed -> {
+            embed.setColor(Color.GREEN)
+                    .setTitle(App.NAME)
+                    .setDescription(App.DESCRIPTION)
+                    .setUrl("https://gitlab.com/lovallat/reminder-bot")
+                    .setTimestamp(Instant.now())
+                    .addField("Version", App.VERSION, false);
+            String imageURL = DiscordManager.getClientImage().block();
+            if (imageURL != null) embed.setThumbnail(imageURL);
+        })).then().onErrorResume(t -> fatalError(event, t));
+    }
+}

app/src/main/java/xyz/vallat/louis/managers/database/StudentManager.java

@@ -63,6 +63,7 @@ public final class StudentManager {
     }
 
     public static boolean deleteFromSnowflake(String snowflake) {
+        logger.debug("Deleting student {}.", snowflake);
         try (Connection connection = DBManager.getConnection()) {
             String sql = "DELETE FROM students WHERE snowflake = ?;";
             try (PreparedStatement stmt = connection.prepareStatement(sql)) {

app/src/main/java/xyz/vallat/louis/managers/discord/DiscordManager.java

@@ -9,10 +9,8 @@ import discord4j.core.object.presence.Activity;
 import discord4j.core.object.presence.Presence;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import xyz.vallat.louis.commands.Command;
+import reactor.core.publisher.Mono;
-import xyz.vallat.louis.commands.Desinscription;
+import xyz.vallat.louis.commands.*;
-import xyz.vallat.louis.commands.Inscription;
-import xyz.vallat.louis.commands.Lien;
 import xyz.vallat.louis.environment.EnvironmentVariables;
 
 import java.util.ArrayList;
@@ -30,6 +28,8 @@ public final class DiscordManager {
         commands.add(new Inscription(PREFIX + "inscription"));
         commands.add(new Desinscription(PREFIX + "désincription"));
         commands.add(new Lien(PREFIX + "lien"));
+        commands.add(new Version(PREFIX + "version"));
+        commands.add(new Aide(PREFIX + "aide"));
     }
 
     private DiscordManager() {
@@ -66,6 +66,11 @@ public final class DiscordManager {
         registerDiscordCommands();
     }
 
+    public static Mono<String> getClientImage() {
+        if (discordClient == null) return Mono.empty();
+        return discordClient.getSelf().map(User::getAvatarUrl);
+    }
+
     public static void onDisconnect() {
         discordClient.onDisconnect().block();
     }