Add pagination precondition

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

@@ -16,7 +16,7 @@ public interface PaginationApi {
      *               <li><b>empty String</b> if you want just the header to be filled only with "="</li></ul>
      * @throws IllegalArgumentException if one of its conditions is met: <ol>
      *     <li><b>header</b> length is more than 50 characters</li>
-     *     <li><b>content</b> is empty</li>
+     *     <li><b>content</b> is empty/blank</li>
      *     <li><b>playerEntity</b> or <b>content</b> are null</li>
      * </ol>
      */

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

@@ -1,18 +1,27 @@
 package fr.altarik.toolbox.pagination.api;
 
 import fr.altarik.toolbox.pagination.PaginatedContent;
+import fr.altarik.toolbox.pagination.precondition.ContentCondition;
+import fr.altarik.toolbox.pagination.precondition.HeaderCondition;
+import fr.altarik.toolbox.pagination.precondition.NullPlayerCondition;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.util.Pair;
 
 import java.util.HashMap;
 import java.util.Map;
+import java.util.function.Predicate;
 
 public class PaginationApiImpl implements PaginationApi {
-
-    Map<ServerPlayerEntity, Pair<Integer, PaginatedContent>> paginatedContent = new HashMap<>();
-
+    private final Map<ServerPlayerEntity, Pair<Integer, PaginatedContent>> paginatedContent = new HashMap<>();
+    private final Predicate<ServerPlayerEntity> playerCondition = new NullPlayerCondition().negate();
+    private final Predicate<String> headerCondition = new HeaderCondition().negate();
+    private final Predicate<String> contentCondition = new ContentCondition().negate();
     @Override
     public void createTable(ServerPlayerEntity playerEntity, String content, String header) {
+        if(playerCondition.test(playerEntity) || headerCondition.test(header) || contentCondition.test(content)) {
+            throw new IllegalArgumentException("Preconditions aren't satisfied");
+        }
+
         // TODO: 01/03/2023
     }
 }

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

@@ -0,0 +1,15 @@
+package fr.altarik.toolbox.pagination.precondition;
+
+import java.util.function.Predicate;
+
+/**
+ * This predicate returns true if the String is not null or
+ * if its content is not blank (empty or only contains whitespaces)
+ */
+public class ContentCondition implements Predicate<String> {
+    @Override
+    public boolean test(String s) {
+        return s != null && !s.isBlank();
+    }
+
+}

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

@@ -0,0 +1,14 @@
+package fr.altarik.toolbox.pagination.precondition;
+
+import java.util.function.Predicate;
+
+/**
+ * This predicate returns true if header is not null, not blank (not empty excluding whitespaces)
+ * and if its length doesn't exceed 50 characters.
+ */
+public class HeaderCondition implements Predicate<String> {
+    @Override
+    public boolean test(String header) {
+        return header != null && !header.isBlank() && header.length() <= 50;
+    }
+}

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

@@ -0,0 +1,15 @@
+package fr.altarik.toolbox.pagination.precondition;
+
+import net.minecraft.server.network.ServerPlayerEntity;
+
+import java.util.function.Predicate;
+
+/**
+ * This predicate returns true if the player isn't null, false otherwise
+ */
+public class NullPlayerCondition implements Predicate<ServerPlayerEntity> {
+    @Override
+    public boolean test(ServerPlayerEntity player) {
+        return player != null;
+    }
+}

Tasks/build.gradle

@@ -1,24 +1,3 @@
-plugins {
-    id 'fabric-loom'
-
-}
-
-dependencies {
-    minecraft "com.mojang:minecraft:${project.minecraft_version}"
-    mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2"
-    modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
-
-    modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
-}
-
-processResources {
-    inputs.property "version", project.version
-
-    filesMatching("fabric.mod.json") {
-        expand "version": project.version
-    }
-}
-
 tasks.withType(JavaCompile).configureEach {
     // ensure that the encoding is set to UTF-8, no matter what the system default is
     // this fixes some edge cases with special characters not displaying correctly

build.gradle

@@ -1,11 +1,12 @@
 plugins {
     id 'java'
-    id 'fabric-loom' version '1.1-SNAPSHOT' apply false
+    id 'fabric-loom' version '1.1-SNAPSHOT'
 }
 
 allprojects {
     apply plugin: 'java'
     apply plugin: 'maven-publish'
+    apply plugin: 'fabric-loom'
 
     group = project.maven_group
     version = project.maven_version
@@ -46,13 +47,45 @@ allprojects {
             }
         }
     }
+
+    processResources {
+        inputs.property "version", project.version
+
+        filesMatching("fabric.mod.json") {
+            expand "version": project.version
+        }
+    }
+
+    tasks.withType(JavaCompile).configureEach {
+        // ensure that the encoding is set to UTF-8, no matter what the system default is
+        // this fixes some edge cases with special characters not displaying correctly
+        // see http://yodaconditions.net/blog/fix-for-java-file-encoding-problems-with-gradle.html
+        // If Javadoc is generated, this must be specified in that task too.
+        it.options.encoding = "UTF-8"
+
+        // The Minecraft launcher currently installs Java 8 for users, so your mod probably wants to target Java 8 too
+        // JDK 9 introduced a new way of specifying this that will make sure no newer classes or methods are used.
+        // We'll use that if it's available, but otherwise we'll use the older option.
+        def targetVersion = 17
+        if (JavaVersion.current().isJava9Compatible()) {
+            it.options.release = targetVersion
+        }
+    }
+
+    dependencies {
+        testImplementation "org.junit.jupiter:junit-jupiter-api:${project.junit_version}"
+        testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:${project.junit_version}"
+        minecraft "com.mojang:minecraft:${project.minecraft_version}"
+        mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2"
+        modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
+    }
+
 }
 
 subprojects {
 
     dependencies {
-        testImplementation "org.junit.jupiter:junit-jupiter-api:${project.junit_version}"
-        testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:${project.junit_version}"
+        modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
     }
 
     java {
@@ -66,11 +99,15 @@ subprojects {
 
 }
 
-jar {
+dependencies {
+    include allprojects.collect { project ->  project }
+}
+
+/*jar {
     dependsOn subprojects.jar 
     subprojects.each { project -> 
         from(project.jar) {
             into("META-INF/jars/")
         }
     }
-}
+}*/

settings.gradle

@@ -10,4 +10,4 @@ pluginManagement {
 }
 
 rootProject.name = 'Toolbox'
-include(':Tasks', ':Database', /* ':Pagination' */)
+include(':Tasks', ':Database', ':Pagination')