Create files from Grasscutter-Quests

these files are NOT directly compatible with Grasscutter, and require additional modifications to the codebase to work.

buildSrc/src/main/java/emu/grasscutter/gen/GenerateActivityConditions.java

@@ -0,0 +1,81 @@
+package emu.grasscutter.gen;
+
+import org.gradle.api.DefaultTask;
+import org.gradle.api.tasks.TaskAction;
+import org.gradle.api.tasks.options.Option;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Path;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import static java.lang.System.lineSeparator;
+import static java.nio.file.Files.readAllLines;
+import static java.nio.file.Files.writeString;
+
+/**
+ * Task that can be used for generating/updating activity conditions enum. These
+ * activities come from Resources/ExcelBinOutput/NewActivityCondExcelConfigData.json
+ * resource file. Format file with formatter after this job is executed
+ * <br />
+ * Usage example: <i>./gradlew generateActivityConditions --conf-file=/Users/xxx/IdeaProjects/Grasscutter_Resources/Resources/ExcelBinOutput/NewActivityCondExcelConfigData.json</i>
+ */
+public class GenerateActivityConditions extends DefaultTask {
+
+    private static final Logger log = LoggerFactory.getLogger(GenerateActivityConditions.class);
+    private static final String ACTIVITY_CONDITIONS_SRC = "/src/main/java/emu/grasscutter/game/activity/condition/ActivityConditions.java";
+
+    private static final String activityClassStart = """
+        package emu.grasscutter.game.activity;
+
+        public enum ActivityConditions {
+                    """;
+    @Option(option = "conf-file", description = "Path to NewActivityCondExcelConfigData.json")
+    String confFile;
+
+    @SuppressWarnings("unused") //Used by Gradle
+    public void setConfFile(String confFile) {
+        this.confFile = confFile;
+    }
+
+    @TaskAction
+    void run() {
+        List<String> configFileContent = getFileContent(confFile);
+
+        Set<String> configEnums = configFileContent.stream()
+            .filter(s -> s.contains("\"type\":"))
+            .map(s -> s.split("\"")[3])
+            .map(s -> "    " + s)
+            .collect(Collectors.toSet());
+
+        String finalActivityClass =
+            activityClassStart +
+                String.join("," + lineSeparator(), configEnums) + lineSeparator() + "}";
+
+        writeFile(finalActivityClass, Path.of(getProject().getProjectDir() + ACTIVITY_CONDITIONS_SRC));
+
+        log.info("Successfully added {} enums to {}", configEnums.size(), ACTIVITY_CONDITIONS_SRC);
+    }
+
+    private List<String> getFileContent(String path) {
+        try {
+            return readAllLines(Path.of(confFile));
+        } catch (IOException e) {
+            log.error("Cannot read file: {}", path);
+            throw new RuntimeException(e);
+        }
+    }
+
+    private void writeFile(String content, Path path) {
+        try {
+            writeString(path, content, StandardCharsets.UTF_8);
+        } catch (IOException e) {
+            log.error("Cannot read file: {}", path);
+            throw new RuntimeException(e);
+        }
+    }
+}