Add TextUtils

TextUtils/src/main/java/eu/mikroskeem/utils/text/MinecraftText.java

@@ -0,0 +1,33 @@
+package eu.mikroskeem.utils.text;
+
+import org.jetbrains.annotations.NotNull;
+
+public class MinecraftText {
+    /**
+     * Validate Minecraft username
+     *
+     * @param name Name to validate
+     * @return Whether name is valid or not
+     */
+    public static boolean validateUsername(@NotNull String name){
+        if(
+                (name.length() > 16 || name.length() < 3) ||   /* Check length */
+                !name.matches("^[A-Za-z0-9_]+$")            /* Check characters */
+                ){
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Translate alternate color codes to Minecraft color codes.
+     *
+     * Note: shittier version of {@link org.bukkit.ChatColor}
+     * @param seq Sequence to replace
+     * @param text Text to do replace on
+     * @return Text with replaced color codes
+     */
+    @NotNull public static String translateAltColors(char seq, @NotNull String text){
+        return text.replace(seq, '§');
+    }
+}

TextUtils/src/main/java/eu/mikroskeem/utils/text/TextUtils.java

@@ -0,0 +1,14 @@
+package eu.mikroskeem.utils.text;
+
+import org.jetbrains.annotations.NotNull;
+
+public class TextUtils {
+    /**
+     * Check if string contains whitespace
+     * @param str String to check
+     * @return Whether string contained whitespace or not
+     */
+    public static boolean hasWhitespace(@NotNull String str){
+        return !str.matches("\\S+");
+    }
+}

TextUtils/src/test/java/eu/mikroskeem/utils/test/text/TestMinecraftUtils.java

@@ -0,0 +1,25 @@
+package eu.mikroskeem.utils.test.text;
+
+import eu.mikroskeem.utils.text.MinecraftText;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestMinecraftUtils {
+    @Test public void testValidUsername(){
+        Assert.assertTrue(MinecraftText.validateUsername("mikroskeem"));
+        Assert.assertTrue(MinecraftText.validateUsername("abcd"));
+        Assert.assertTrue(MinecraftText.validateUsername("abc_"));
+    }
+
+    @Test public void testInvalidUsername(){
+        Assert.assertFalse(MinecraftText.validateUsername("mikros--"));
+        Assert.assertFalse(MinecraftText.validateUsername("mikr_os--"));
+        Assert.assertFalse(MinecraftText.validateUsername("aa"));
+        Assert.assertFalse(MinecraftText.validateUsername("     "));
+        Assert.assertFalse(MinecraftText.validateUsername("     "));
+    }
+
+    @Test public void testColorReplacing(){
+        Assert.assertEquals("§c§lHello", MinecraftText.translateAltColors('&', "&c&lHello"));
+    }
+}

TextUtils/src/test/java/eu/mikroskeem/utils/test/text/TestTextUtils.java

@@ -0,0 +1,22 @@
+package eu.mikroskeem.utils.test.text;
+
+import eu.mikroskeem.utils.text.TextUtils;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestTextUtils {
+    @Test public void testSpaceWhitespace(){
+        String text = "wut lel";
+        Assert.assertTrue(TextUtils.hasWhitespace(text));
+    }
+
+    @Test public void testTabWhitespace(){
+        String text = "wut" + '\t' + "lel";
+        Assert.assertTrue(TextUtils.hasWhitespace(text));
+    }
+
+    @Test public void testNoWhitespace(){
+        String text = "wut";
+        Assert.assertFalse(TextUtils.hasWhitespace(text));
+    }
+}