Pagination/src/main/java/fr/altarik/toolbox/pagination/PaginatedContent.java

@@ -1,5 +1,6 @@
 package fr.altarik.toolbox.pagination;
 
+import fr.altarik.toolbox.pagination.api.PageIndexOutOfBoundException;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.text.ClickEvent;
 import net.minecraft.text.MutableText;
@@ -45,14 +46,14 @@ public class PaginatedContent {
 
     private Text buildHeader(String header) {
         int numberOfEq = (50 - header.length()) / 2;
-        return Text.literal("=".repeat(numberOfEq) + header + "=".repeat(numberOfEq));
+        return Text.literal("=".repeat(numberOfEq) + " " + header + " " + "=".repeat(numberOfEq));
     }
 
-    public void display(ServerPlayerEntity playerEntity, int page) {
+    public void display(ServerPlayerEntity playerEntity, int page) throws PageIndexOutOfBoundException {
        if(page >= this.pages.size()) {
-           throw new IllegalArgumentException("There's " + this.pages.size() + " paginated pages but you wanted page n°" + (page + 1));
+           throw new PageIndexOutOfBoundException("api.pagination.page_higher_than_expected", this.pages.size(), (page + 1));
        } else if(page < 0) {
-           throw new IllegalArgumentException("argument page is lower than 0");
+           throw new PageIndexOutOfBoundException("api.pagination.page_lower_than_0");
        } else {
            playerEntity.sendMessage(header);
            for(Text s : pages.get(page).lines) {

Pagination/src/main/java/fr/altarik/toolbox/pagination/Pagination.java

@@ -19,13 +19,14 @@ public class Pagination implements ModInitializer {
 
     @Override
     public void onInitialize() {
-        CommandRegistrationCallback.EVENT.register((dispatcher, registryAccess, environment) -> new CommandsRegister(this).register(dispatcher, environment.dedicated));
+        CommandRegistrationCallback.EVENT.register((dispatcher, registryAccess, environment) -> new CommandsRegister(this).register(dispatcher));
     }
 
     public @NotNull PaginationApi getApi() {
         return api;
     }
 
+    @SuppressWarnings("unused")
     public static @NotNull Pagination getInstance() {
         return instance;
     }

Pagination/src/main/java/fr/altarik/toolbox/pagination/api/PageIndexOutOfBoundException.java

@@ -0,0 +1,20 @@
+package fr.altarik.toolbox.pagination.api;
+
+import net.minecraft.text.Text;
+
+public class PageIndexOutOfBoundException extends Exception {
+
+    private final Text text;
+
+    public PageIndexOutOfBoundException(String s) {
+        this.text = Text.translatable(s);
+    }
+
+    public PageIndexOutOfBoundException(String s, int size, int currentPage) {
+        this.text = Text.translatable(s, size, currentPage);
+    }
+
+    public Text getText() {
+        return text;
+    }
+}

Pagination/src/main/java/fr/altarik/toolbox/pagination/api/PaginationApi.java

@@ -32,6 +32,6 @@ public interface PaginationApi {
      * @throws NullPointerException if player is null or paginated content for the player doesn't exist (or have expired)
      * @see fr.altarik.toolbox.pagination.PaginatedContent#display(ServerPlayerEntity, int)
      */
-    void display(ServerPlayerEntity player, int page);
+    void display(ServerPlayerEntity player, int page) throws PageIndexOutOfBoundException;
 
 }

Pagination/src/main/java/fr/altarik/toolbox/pagination/api/PaginationApiImpl.java

@@ -35,12 +35,17 @@ public class PaginationApiImpl implements PaginationApi {
         }
         PaginatedContent paginatedContent1 = new PaginatedContent(header, content);
         paginatedContent.put(playerEntity, new Pair<>(18000, paginatedContent1));
-        if(display)
+        if(display) {
+            try {
                 paginatedContent1.display(playerEntity, 0);
+            } catch (PageIndexOutOfBoundException e) {
+                throw new IllegalArgumentException(e);
+            }
+        }
     }
 
     @Override
-    public void display(ServerPlayerEntity player, int page) {
+    public void display(ServerPlayerEntity player, int page) throws PageIndexOutOfBoundException {
         if(player == null)
             throw new NullPointerException("Player is null");
         Pair<Integer, PaginatedContent> pair = paginatedContent.get(player);

Pagination/src/main/java/fr/altarik/toolbox/pagination/command/CommandsRegister.java

@@ -4,10 +4,11 @@ import com.mojang.brigadier.CommandDispatcher;
 import com.mojang.brigadier.arguments.IntegerArgumentType;
 import com.mojang.brigadier.context.CommandContext;
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
+import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
 import fr.altarik.toolbox.pagination.Pagination;
+import fr.altarik.toolbox.pagination.api.PageIndexOutOfBoundException;
 import fr.altarik.toolbox.pagination.api.PaginationApi;
 import net.minecraft.server.command.ServerCommandSource;
-import net.minecraft.text.Text;
 
 import static net.minecraft.server.command.CommandManager.argument;
 import static net.minecraft.server.command.CommandManager.literal;
@@ -20,7 +21,7 @@ public class CommandsRegister {
         this.api = instance.getApi();
     }
 
-    public void register(CommandDispatcher<ServerCommandSource> dispatcher, boolean dedicated) {
+    public void register(CommandDispatcher<ServerCommandSource> dispatcher) {
         dispatcher.register(literal("table")
                 .then(literal("page")
                         .then(argument("page", IntegerArgumentType.integer())
@@ -60,8 +61,8 @@ public class CommandsRegister {
         try {
             int page = IntegerArgumentType.getInteger(context, "page");
             api.display(context.getSource().getPlayerOrThrow(), page);
-        } catch(NullPointerException | IllegalArgumentException e) {
+        } catch(PageIndexOutOfBoundException e) {
-            context.getSource().sendFeedback(Text.literal("Error: " + e.getMessage()), false);
+            throw new CommandSyntaxException(new SimpleCommandExceptionType(e.getText()), e.getText());
         }
         return 0;
     }

Pagination/src/main/resources/assets/pagination/lang/en_us.json

@@ -0,0 +1,4 @@
+{
+  "api.pagination.page_lower_than_0": "argument page is lower than 0",
+  "api.pagination.page_higher_than_expected": "There's %d paginated pages but you wanted page n°%d"
+}