Major system rework

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/impl/validation/ValidFile.java

@@ -0,0 +1,16 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.validation;
+
+import jakarta.validation.Constraint;
+import jakarta.validation.Payload;
+
+import java.lang.annotation.*;
+
+@Documented
+@Constraint(validatedBy = ValidFileValidator.class)
+@Target({ElementType.METHOD, ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ValidFile {
+    String message() default "File does not exist";
+    Class<?>[] groups() default {};
+    Class<? extends Payload>[] payload() default {};
+}

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/impl/validation/ValidFileValidator.java

@@ -0,0 +1,17 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.validation;
+
+import jakarta.validation.ConstraintValidator;
+import jakarta.validation.ConstraintValidatorContext;
+
+import java.io.File;
+
+public class ValidFileValidator implements ConstraintValidator<ValidFile, File> {
+    @Override
+    public void initialize(ValidFile constraintAnnotation) {
+    }
+
+    @Override
+    public boolean isValid(File file, ConstraintValidatorContext context) {
+        return file != null && file.exists();
+    }
+}

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/impl/validation/ValidMkvToolNix.java

@@ -0,0 +1,16 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.validation;
+
+import jakarta.validation.Constraint;
+import jakarta.validation.Payload;
+
+import java.lang.annotation.*;
+
+@Documented
+@Constraint(validatedBy = ValidMkvToolNixValidator.class)
+@Target({ElementType.METHOD, ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ValidMkvToolNix {
+    String message() default "MkvToolNix does not exist";
+    Class<?>[] groups() default {};
+    Class<? extends Payload>[] payload() default {};
+}

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/impl/validation/ValidMkvToolNixValidator.java

@@ -0,0 +1,24 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.validation;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.MkvToolNix;
+import jakarta.validation.ConstraintValidator;
+import jakarta.validation.ConstraintValidatorContext;
+
+import java.io.File;
+
+import static at.pcgamingfreaks.mkvaudiosubtitlechanger.util.FileUtils.getPathFor;
+
+public class ValidMkvToolNixValidator implements ConstraintValidator<ValidMkvToolNix, File> {
+    @Override
+    public void initialize(ValidMkvToolNix constraintAnnotation) {
+    }
+
+    @Override
+    public boolean isValid(File file, ConstraintValidatorContext context) {
+        return file != null && file.exists()
+                && getPathFor(file, MkvToolNix.MKV_MERGE).exists()
+                && getPathFor(file, MkvToolNix.MKV_PROP_EDIT).exists();
+    }
+
+
+}

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/impl/validation/ValidationExecutionStrategy.java

@@ -0,0 +1,31 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.impl.validation;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.Main;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.InputConfig;
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.util.ValidationUtil;
+import jakarta.validation.ConstraintViolation;
+import jakarta.validation.Validator;
+import picocli.CommandLine;
+
+import java.util.Set;
+
+public class ValidationExecutionStrategy implements CommandLine.IExecutionStrategy {
+
+    public int execute(CommandLine.ParseResult parseResult) {
+        if (!parseResult.isVersionHelpRequested() && !parseResult.isUsageHelpRequested()) validate(parseResult.commandSpec());
+        return new CommandLine.RunLast().execute(parseResult);
+    }
+
+    private static void validate(CommandLine.Model.CommandSpec spec) {
+        Validator validator = ValidationUtil.getValidator();
+        Set<ConstraintViolation<InputConfig>> violations = validator.validate(((Main)spec.userObject()).getConfig());
+
+        if (!violations.isEmpty()) {
+            StringBuilder errors = new StringBuilder();
+            for (ConstraintViolation<InputConfig> violation : violations) {
+                errors.append(violation.getPropertyPath()).append(" ").append(violation.getMessage()).append("\n");
+            }
+            throw new CommandLine.ParameterException(spec.commandLine(), errors.toString());
+        }
+    }
+}