1 files changed, 51 insertions, 0 deletions
diff --git a/src/ri-engine/src/main/java/io/trygvis/rules/engine/JinjavaTemplateEngine.java b/src/ri-engine/src/main/java/io/trygvis/rules/engine/JinjavaTemplateEngine.java
new file mode 100644
index 0000000..ba23089
--- /dev/null
+++ b/src/ri-engine/src/main/java/io/trygvis/rules/engine/JinjavaTemplateEngine.java
@@ -0,0 +1,51 @@
+package io.trygvis.rules.engine;
+
+import ch.qos.logback.core.util.FileUtil;
+import com.hubspot.jinjava.Jinjava;
+import org.apache.commons.io.FileUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * TODO: cache templates.
+ */
+public class JinjavaTemplateEngine implements TemplateEngine {
+    private final Logger logger = LoggerFactory.getLogger(getClass());
+
+    private final Jinjava jinjava = new Jinjava();
+
+    private final TemplateLoader loader;
+    private final File basedir;
+
+    public JinjavaTemplateEngine(TemplateLoader templateLoader, File basedir) {
+        Objects.requireNonNull(templateLoader);
+        Objects.requireNonNull(basedir);
+        this.loader = templateLoader;
+        this.basedir = basedir;
+    }
+
+    @Override
+    public void clean() {
+        try {
+            logger.info("Removing output directory: {}", basedir);
+            FileUtils.deleteDirectory(basedir);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    @Override
+    public void template(String name, String output, Map<String, Object> params) throws IOException {
+        var template = loader.load(name);
+        String renderedTemplate = jinjava.render(template, params);
+        var f = new File(basedir, output);
+        FileUtil.createMissingParentDirectories(f);
+        Files.writeString(f.toPath(), renderedTemplate);
+    }
+}