1 files changed, 65 insertions, 7 deletions

diff --git a/src/main/java/design/persistence/JSONLeagueDatabase.java b/src/main/java/design/persistence/JSONLeagueDatabase.java
index 01f4fc3..78e1903 100644
--- a/src/main/java/design/persistence/JSONLeagueDatabase.java
+++ b/src/main/java/design/persistence/JSONLeagueDatabase.java
@@ -1,11 +1,26 @@
 package design.persistence;
 
+import com.fasterxml.jackson.annotation.JsonAutoDetect;
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.PropertyAccessor;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.databind.*;
+import com.fasterxml.jackson.databind.module.SimpleModule;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
+import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
+import design.model.Course;
+import design.model.Golfer;
 import design.model.League;
 
 import java.io.File;
+import java.io.IOException;
+import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
 
+import static design.persistence.JSONPersonalDatabase.*;
+
 public class JSONLeagueDatabase implements LeagueDatabase {
 
     private static JSONLeagueDatabase INSTANCE;
@@ -18,19 +33,44 @@ public class JSONLeagueDatabase implements LeagueDatabase {
     }
 
     private final Map<Integer, League> cache;
+    private final ObjectMapper mapper;
     private final File file;
+    private int nextLeagueID;
 
     public JSONLeagueDatabase(String filename) {
         this.file = new File(filename);
         this.cache = new HashMap<>();
+        this.mapper = new ObjectMapper();
+
+        SimpleModule module = new SimpleModule();
+        module.addDeserializer(Course.class, new CourseIdDeserializer());
+        module.addSerializer(Course.class, new CourseIdSerializer());
+        module.addDeserializer(Golfer.class, new GolferUsernameDeserializer());
+        module.addSerializer(Golfer.class, new GolferUsernameSerializer());
+        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+        mapper.registerModule(module);
+        mapper.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);
+        mapper.registerModule(new ParameterNamesModule(JsonCreator.Mode.PROPERTIES));
+        mapper.registerModule(new JavaTimeModule());
+
+        try {
+            load();
+        } catch (IOException ex) {
+            throw new RuntimeException(ex);
+        }
+
+        this.nextLeagueID = cache.values().stream().mapToInt(League::getId).max().orElse(0) + 1;
     }
 
-    private void load() {
-        //TODO impl
+    private void load() throws IOException {
+        League[] data = mapper.readValue(file, League[].class);
+        cache.clear();
+        Arrays.stream(data).forEach(i -> cache.put(i.getId(), i));
     }
 
-    private void save() {
-        //TODO impl
+    private void save() throws IOException {
+        League[] data = cache.values().toArray(League[]::new);
+        mapper.writer(new CustomPrettyPrinter()).writeValue(file, data);
     }
 
     @Override
@@ -44,20 +84,38 @@ public class JSONLeagueDatabase implements LeagueDatabase {
     }
 
     @Override
-    public void addLeague(League league) {
+    public void addLeague(League league) throws IOException {
+        league.setId(nextLeagueID++);
         cache.putIfAbsent(league.getId(), league);
         save();
     }
 
     @Override
-    public void removeLeague(League league) {
+    public void removeLeague(League league) throws IOException {
         cache.remove(league.getId());
         save();
     }
 
     @Override
-    public void updateLeague(League league) {
+    public void updateLeague(League league) throws IOException {
         cache.put(league.getId(), league);
         save();
     }
+
+    protected static class GolferUsernameSerializer extends JsonSerializer<Golfer> {
+        @Override
+        public void serialize(Golfer course, JsonGenerator gen, SerializerProvider serializers) throws IOException {
+            gen.writeString(course.getUsername());
+        }
+    }
+
+    protected static class GolferUsernameDeserializer extends JsonDeserializer<Golfer> {
+        PersonalDatabase personalDB = PersonalDatabase.instance();
+
+        @Override
+        public Golfer deserialize(JsonParser p, DeserializationContext context) throws IOException {
+            String username = p.getValueAsString();
+            return personalDB.getGolfer(username);
+        }
+    }
 }