From 4a171d75f2972906366fe27666c7dc863f3b9c15 Mon Sep 17 00:00:00 2001
From: Ashar Fuadi <fushar@gmail.com>
Date: Sun, 18 Aug 2024 09:45:28 +0700
Subject: [PATCH] HACK: refactor OSN 2024 hacks on grader-side

---
 .../gabriel/grading/GradingWorker.java        |  5 ++++
 .../judgels/gabriel/api/Osn2024Hacks.java     | 25 +++++++++++++++++++
 .../programming/ProgrammingProblemStore.java  | 15 ++---------
 3 files changed, 32 insertions(+), 13 deletions(-)
 create mode 100644 judgels-backends/judgels-grader-engines/src/main/java/judgels/gabriel/api/Osn2024Hacks.java

diff --git a/judgels-backends/judgels-grader-app/src/main/java/judgels/gabriel/grading/GradingWorker.java b/judgels-backends/judgels-grader-app/src/main/java/judgels/gabriel/grading/GradingWorker.java
index ac9ab5e27..bd50041a3 100644
--- a/judgels-backends/judgels-grader-app/src/main/java/judgels/gabriel/grading/GradingWorker.java
+++ b/judgels-backends/judgels-grader-app/src/main/java/judgels/gabriel/grading/GradingWorker.java
@@ -24,6 +24,7 @@
 import judgels.gabriel.api.GradingResponse;
 import judgels.gabriel.api.GradingResult;
 import judgels.gabriel.api.GradingSource;
+import judgels.gabriel.api.Osn2024Hacks;
 import judgels.gabriel.api.SandboxFactory;
 import judgels.gabriel.api.SourceFile;
 import judgels.gabriel.api.SubmissionSource;
@@ -242,6 +243,10 @@ private GradingEngine getGradingEngine(Path problemGradingDir) throws IOExceptio
     private GradingConfig parseGradingConfig(Path problemGradingDir, GradingEngine engine) throws IOException {
         Path gradingConfig = problemGradingDir.resolve("config.json");
         String configAsJson = Files.readString(gradingConfig, StandardCharsets.UTF_8);
+
+        // HACK for OSN 2024
+        configAsJson = Osn2024Hacks.checkForHack(request.getProblemJid(), configAsJson);
+
         return engine.parseConfig(MAPPER, configAsJson);
     }
 
diff --git a/judgels-backends/judgels-grader-engines/src/main/java/judgels/gabriel/api/Osn2024Hacks.java b/judgels-backends/judgels-grader-engines/src/main/java/judgels/gabriel/api/Osn2024Hacks.java
new file mode 100644
index 000000000..ddb9c8850
--- /dev/null
+++ b/judgels-backends/judgels-grader-engines/src/main/java/judgels/gabriel/api/Osn2024Hacks.java
@@ -0,0 +1,25 @@
+package judgels.gabriel.api;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class Osn2024Hacks {
+    private Osn2024Hacks() {}
+
+    private static final List<String> CERTAIN_PROBLEM_JIDS = Arrays.asList(
+            "JIDPROG0NHjqvK7B7oiYf6mOOov",
+            "JIDPROGiZN73iuSVYJE5btHUzni",
+            "JIDPROGbDLh6vwDRHTXFijN3HYC",
+            "JIDPROGSohGUsEykcREuewkE2cn"
+    );
+
+    public static String checkForHack(String problemJid, String gradingConfig) {
+        if (CERTAIN_PROBLEM_JIDS.contains(problemJid)) {
+            String hacked = gradingConfig;
+            hacked = hacked.substring(0, gradingConfig.length() - 1);
+            hacked = hacked + ",\"scoringConfig\":{\"roundingMode\":\"FLOOR\"}}";
+            return hacked;
+        }
+        return gradingConfig;
+    }
+}
diff --git a/judgels-backends/judgels-server-app/src/main/java/judgels/sandalphon/problem/programming/ProgrammingProblemStore.java b/judgels-backends/judgels-server-app/src/main/java/judgels/sandalphon/problem/programming/ProgrammingProblemStore.java
index 86448338e..feec13c4a 100644
--- a/judgels-backends/judgels-server-app/src/main/java/judgels/sandalphon/problem/programming/ProgrammingProblemStore.java
+++ b/judgels-backends/judgels-server-app/src/main/java/judgels/sandalphon/problem/programming/ProgrammingProblemStore.java
@@ -5,13 +5,13 @@
 import java.io.InputStream;
 import java.nio.file.Path;
 import java.time.Instant;
-import java.util.Arrays;
 import java.util.List;
 import javax.inject.Inject;
 import judgels.fs.FileInfo;
 import judgels.fs.FileSystem;
 import judgels.gabriel.api.GradingConfig;
 import judgels.gabriel.api.LanguageRestriction;
+import judgels.gabriel.api.Osn2024Hacks;
 import judgels.gabriel.api.ScoringConfig;
 import judgels.gabriel.engines.GradingEngineRegistry;
 import judgels.sandalphon.api.problem.programming.ProblemSubmissionConfig;
@@ -19,14 +19,6 @@
 import judgels.sandalphon.problem.base.ProblemFs;
 
 public final class ProgrammingProblemStore extends BaseProblemStore {
-    // HACK for OSN 2024
-    private static final List<String> OSN_2024_CERTAIN_PROBLEMS = Arrays.asList(
-            "JIDPROG0NHjqvK7B7oiYf6mOOov",
-            "JIDPROGiZN73iuSVYJE5btHUzni",
-            "JIDPROGbDLh6vwDRHTXFijN3HYC",
-            "JIDPROGSohGUsEykcREuewkE2cn"
-    );
-
     @Inject
     public ProgrammingProblemStore(ObjectMapper mapper, @ProblemFs FileSystem problemFs) {
         super(mapper, problemFs);
@@ -60,10 +52,7 @@ public GradingConfig getGradingConfig(String userJid, String problemJid) {
         String gradingConfig = problemFs.readFromFile(getGradingConfigFilePath(userJid, problemJid));
 
         // HACK for OSN 2024
-        if (OSN_2024_CERTAIN_PROBLEMS.contains(problemJid)) {
-            gradingConfig = gradingConfig.substring(0, gradingConfig.length() - 1);
-            gradingConfig = gradingConfig + ",\"scoringConfig\":{\"roundingMode\":\"FLOOR\"}}";
-        }
+        gradingConfig = Osn2024Hacks.checkForHack(problemJid, gradingConfig);
 
         try {
             return GradingEngineRegistry.getInstance().get(gradingEngine).parseConfig(mapper, gradingConfig);