[IMPL] MkvFileCollector + FileCollector interface + new structure

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/intimpl/FileCollector.java

@@ -0,0 +1,12 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.intimpl;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.FileAttribute;
+
+import java.io.File;
+import java.util.List;
+
+public interface FileCollector {
+    List<File> loadFiles(String path);
+
+    List<FileAttribute> loadAttributes(File file);
+}

src/main/java/at/pcgamingfreaks/mkvaudiosubtitlechanger/intimpl/MkvFileCollector.java

@@ -0,0 +1,86 @@
+package at.pcgamingfreaks.mkvaudiosubtitlechanger.intimpl;
+
+import at.pcgamingfreaks.mkvaudiosubtitlechanger.model.FileAttribute;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import config.MKVToolProperties;
+import lombok.extern.log4j.Log4j2;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+@Log4j2
+public class MkvFileCollector implements FileCollector {
+    private ObjectMapper mapper = new ObjectMapper();
+
+    /**
+     * @param path Is entered path, which leads to one file directly or a directory which will be loaded recursive
+     * @return list of all files within the directory, if it's only a file, the file will be returned in a list
+     */
+    @Override
+    public List<File> loadFiles(String path) {
+        File file = new File(path);
+        if(file.isFile() && file.getAbsolutePath().endsWith(".mkv")){
+            return new ArrayList<File>() {{
+                add(file);
+            }};
+        }else if(file.isDirectory()){
+            try(Stream<Path> paths = Files.walk(Paths.get(path))){
+                return paths
+                        .filter(Files::isRegularFile)
+                        .map(Path::toFile)
+                        .filter(f -> f.getAbsolutePath().endsWith(".mkv"))
+                        .collect(Collectors.toList());
+            }catch(IOException e){
+                log.error("Couldn't find file or directory!", e);
+                return null;
+            }
+        }else{
+            return null;
+        }
+    }
+
+    /**
+     * @param file Takes the file from which the attributes will be returned
+     * @return list of all important attributes
+     */
+    @Override
+    public List<FileAttribute> loadAttributes(File file) {
+        Map<String, Object> jsonMap;
+        List<FileAttribute> fileAttributes = new ArrayList<>();
+        try(InputStream inputStream =
+                    Runtime.getRuntime().exec("\"" + MKVToolProperties.getInstance().getMkvmergePath()
+                            + "\" --identify --identification-format json \"" + file.getAbsolutePath() + "\"").getInputStream()){
+            jsonMap = mapper.readValue(inputStream, Map.class);
+            List<Map<String, Object>> tracks = (List<Map<String, Object>>) jsonMap.get("tracks");
+
+            for(Map<String, Object> attribute : tracks){
+                if(! "video".equals(attribute.get("type"))){
+                    Map<String, Object> properties = (Map<String, Object>) attribute.get("properties");
+                    fileAttributes.add(new FileAttribute(
+                            (int) properties.get("number"),
+                            (String) properties.get("language"),
+                            (String) properties.get("track_name"),
+                            (Boolean) properties.get("default_track"),
+                            (Boolean) properties.get("forced_track"),
+                            (String) attribute.get("type")));
+                }
+            }
+        }catch(IOException e){
+            log.error("File could not be found or loaded!");
+        }
+        return fileAttributes;
+    }
+
+    private boolean verifyFile(File file) {
+        return false;
+    }
+}