[jsscripting] ES6+ Support (openhab#8516)

Signed-off-by: Jonathan Gilbert <jpg@trillica.com>

CODEOWNERS

@@ -6,6 +6,7 @@
 
 # Add-on maintainers:
 /bundles/org.openhab.automation.groovyscripting/ @wborn
+/bundles/org.openhab.automation.jsscripting/ @jpg0
 /bundles/org.openhab.automation.jythonscripting/ @openhab/add-ons-maintainers
 /bundles/org.openhab.automation.pidcontroller/ @fwolter
 /bundles/org.openhab.binding.adorne/ @theiding

bom/openhab-addons/pom.xml

@@ -31,6 +31,11 @@
       <artifactId>org.openhab.automation.pidcontroller</artifactId>
       <version>${project.version}</version>
     </dependency>
+    <dependency>
+      <groupId>org.openhab.addons.bundles</groupId>
+      <artifactId>org.openhab.automation.jsscripting</artifactId>
+      <version>${project.version}</version>
+    </dependency>
     <dependency>
       <groupId>org.openhab.addons.bundles</groupId>
       <artifactId>org.openhab.binding.adorne</artifactId>

bundles/org.openhab.automation.jsscripting/NOTICE

@@ -0,0 +1,13 @@
+This content is produced and maintained by the openHAB project.
+
+* Project home: https://www.openhab.org
+
+== Declared Project Licenses
+
+This program and the accompanying materials are made available under the terms
+of the Eclipse Public License 2.0 which is available at
+https://www.eclipse.org/legal/epl-2.0/.
+
+== Source Code
+
+https://github.com/openhab/openhab-addons

bundles/org.openhab.automation.jsscripting/README.md

@@ -0,0 +1,43 @@
+# JavaScript Scripting
+
+This add-on provides support for JavaScript (ECMAScript 2021+) that can be used as a scripting language within automation rules.
+
+## Creating JavaScript Scripts
+
+When this add-on is installed, JavaScript script actions will be run by this add-on and allow ECMAScript 2021+ features.
+
+Alternatively, you can create scripts in the `automation/jsr223` configuration directory.
+If you create an empty file called `test.js`, you will see a log line with information similar to:
+
+```text
+    ... [INFO ] [.a.m.s.r.i.l.ScriptFileWatcher:150  ] - Loading script 'test.js'
+```
+
+To enable debug logging, use the [console logging]({{base}}/administration/logging.html) commands to enable debug logging for the automation functionality:
+
+```text
+log:set DEBUG org.openhab.core.automation
+```
+
+For more information on the available APIs in scripts see the [JSR223 Scripting]({{base}}/configuration/jsr223.html) documentation.
+
+## Script Examples
+
+JavaScript scripts provide access to almost all the functionality in an openHAB runtime environment.
+As a simple example, the following script logs "Hello, World!".
+Note that `console.log` will usually not work since the output has no terminal to display the text.
+The openHAB server uses the [SLF4J](https://www.slf4j.org/) library for logging.
+
+```js
+const LoggerFactory = Java.type('org.slf4j.LoggerFactory');
+
+LoggerFactory.getLogger("org.openhab.core.automation.examples").info("Hello world!");
+```
+
+Depending on the openHAB logging configuration, you may need to prefix logger names with `org.openhab.core.automation` for them to show up in the log file (or you modify the logging configuration).
+
+The script uses the [LoggerFactory](https://www.slf4j.org/apidocs/org/slf4j/Logger.html) to obtain a named logger and then logs a message like:
+
+```text
+    ... [INFO ] [.openhab.core.automation.examples:-2   ] - Hello world!
+```

bundles/org.openhab.automation.jsscripting/bnd.bnd

@@ -0,0 +1,13 @@
+Bundle-SymbolicName: ${project.artifactId}
+DynamicImport-Package: *
+Import-Package: org.openhab.core.automation.module.script,javax.management,javax.script,javax.xml.datatype,javax.xml.stream;version="[1.0,2)",org.osgi.framework;version="[1.8,2)",org.slf4j;version="[1.7,2)"
+Require-Capability: osgi.extender;
+      filter:="(osgi.extender=osgi.serviceloader.processor)",
+    osgi.serviceloader;
+      filter:="(osgi.serviceloader=org.graalvm.polyglot.impl.AbstractPolyglotImpl)";
+      cardinality:=multiple
+
+SPI-Provider: *
+SPI-Consumer: *
+
+-fixupmessages "Classes found in the wrong directory"; restrict:=error; is:=warning

bundles/org.openhab.automation.jsscripting/pom.xml

@@ -0,0 +1,115 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+
+  <modelVersion>4.0.0</modelVersion>
+
+  <parent>
+    <groupId>org.openhab.addons.bundles</groupId>
+    <artifactId>org.openhab.addons.reactor.bundles</artifactId>
+    <version>3.1.0-SNAPSHOT</version>
+  </parent>
+
+  <artifactId>org.openhab.automation.jsscripting</artifactId>
+
+  <name>openHAB Add-ons :: Bundles :: Automation :: JSScripting</name>
+
+  <properties>
+    <bnd.importpackage>
+      !sun.misc.*,
+      !sun.reflect.*,
+      !com.sun.management.*,
+      !jdk.internal.reflect.*,
+      !jdk.vm.ci.services
+    </bnd.importpackage>
+    <graal.version>20.1.0</graal.version>
+    <asm.version>6.2.1</asm.version>
+    <oh.version>${project.version}</oh.version>
+  </properties>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-dependency-plugin</artifactId>
+        <executions>
+          <execution>
+            <id>embed-dependencies</id>
+            <goals>
+              <goal>unpack-dependencies</goal>
+            </goals>
+            <configuration>
+              <excludes>META-INF/services/com.oracle.truffle.api.TruffleLanguage$Provider</excludes> <!-- we'll provide this -->
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.graalvm.truffle</groupId>
+      <artifactId>truffle-api</artifactId>
+      <version>${graal.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.graalvm.js</groupId>
+      <artifactId>js-scriptengine</artifactId>
+      <version>${graal.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.graalvm.js</groupId>
+      <artifactId>js-launcher</artifactId>
+      <version>${graal.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.graalvm.sdk</groupId>
+      <artifactId>graal-sdk</artifactId>
+      <version>${graal.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.graalvm.regex</groupId>
+      <artifactId>regex</artifactId>
+      <version>${graal.version}</version>
+    </dependency>
+    <dependency> <!-- this must come AFTER the regex lib -->
+      <groupId>org.graalvm.js</groupId>
+      <artifactId>js</artifactId>
+      <version>${graal.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>com.ibm.icu</groupId>
+      <artifactId>icu4j</artifactId>
+      <version>62.1</version>
+    </dependency>
+
+    <!-- include as version required is older than OH provides -->
+    <dependency>
+      <groupId>org.ow2.asm</groupId>
+      <artifactId>asm</artifactId>
+      <version>${asm.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.ow2.asm</groupId>
+      <artifactId>asm-commons</artifactId>
+      <version>${asm.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.ow2.asm</groupId>
+      <artifactId>asm-tree</artifactId>
+      <version>${asm.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.ow2.asm</groupId>
+      <artifactId>asm-util</artifactId>
+      <version>${asm.version}</version>
+    </dependency>
+    <dependency>
+      <groupId>org.ow2.asm</groupId>
+      <artifactId>asm-analysis</artifactId>
+      <version>${asm.version}</version>
+    </dependency>
+  </dependencies>
+</project>

bundles/org.openhab.automation.jsscripting/src/main/feature/feature.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<features name="org.openhab.automation.jsscripting-${project.version}" xmlns="http://karaf.apache.org/xmlns/features/v1.4.0">
+	<repository>mvn:org.openhab.core.features.karaf/org.openhab.core.features.karaf.openhab-core/${ohc.version}/xml/features</repository>
+
+	<feature name="openhab-automation-jsscripting" description="JSScripting" version="${project.version}">
+		<feature>openhab-runtime-base</feature>
+		<bundle start-level="80">mvn:org.openhab.addons.bundles/org.openhab.automation.jsscripting/${project.version}</bundle>
+	</feature>
+</features>

bundles/org.openhab.automation.jsscripting/src/main/java/org/openhab/automation/jsscripting/ClassExtender.java

@@ -0,0 +1,37 @@
+/**
+ * Copyright (c) 2010-2021 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.automation.jsscripting;
+
+import com.oracle.truffle.js.runtime.java.adapter.JavaAdapterFactory;
+
+/**
+ * Class utility to allow creation of 'extendable' classes with a classloader of the GraalJS bundle, rather than the
+ * classloader of the file being extended.
+ *
+ * @author Jonathan Gilbert - Initial contribution
+ */
+public class ClassExtender {
+    private static ClassLoader classLoader = ClassExtender.class.getClassLoader();
+
+    public static Object extend(String className) {
+        try {
+            return extend(Class.forName(className));
+        } catch (ClassNotFoundException e) {
+            throw new RuntimeException("Cannot find class " + className, e);
+        }
+    }
+
+    public static Object extend(Class<?> clazz) {
+        return JavaAdapterFactory.getAdapterClassFor(clazz, null, classLoader);
+    }
+}

bundles/org.openhab.automation.jsscripting/src/main/java/org/openhab/automation/jsscripting/internal/DebuggingGraalScriptEngine.java

@@ -0,0 +1,49 @@
+/**
+ * Copyright (c) 2010-2021 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+
+package org.openhab.automation.jsscripting.internal;
+
+import javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptException;
+
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.graalvm.polyglot.PolyglotException;
+import org.openhab.automation.jsscripting.internal.scriptengine.InvocationInterceptingScriptEngineWithInvocable;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Wraps ScriptEngines provided by Graal to provide error messages and stack traces for scripts.
+ *
+ * @author Jonathan Gilbert - Initial contribution
+ */
+@NonNullByDefault
+class DebuggingGraalScriptEngine<T extends ScriptEngine & Invocable>
+        extends InvocationInterceptingScriptEngineWithInvocable<T> {
+
+    private static final Logger stackLogger = LoggerFactory.getLogger("org.openhab.automation.script.javascript.stack");
+
+    public DebuggingGraalScriptEngine(T delegate) {
+        super(delegate);
+    }
+
+    @Override
+    public ScriptException afterThrowsInvocation(ScriptException se) {
+        Throwable cause = se.getCause();
+        if (cause instanceof PolyglotException) {
+            stackLogger.error("Failed to execute script:", cause);
+        }
+        return se;
+    }
+}

bundles/org.openhab.automation.jsscripting/src/main/java/org/openhab/automation/jsscripting/internal/GraalJSScriptEngineFactory.java

@@ -0,0 +1,56 @@
+/**
+ * Copyright (c) 2010-2021 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+package org.openhab.automation.jsscripting.internal;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import javax.script.ScriptEngine;
+
+import org.openhab.core.automation.module.script.ScriptEngineFactory;
+import org.osgi.service.component.annotations.Component;
+
+import com.oracle.truffle.js.scriptengine.GraalJSEngineFactory;
+
+/**
+ * An implementation of {@link ScriptEngineFactory} with customizations for GraalJS ScriptEngines.
+ *
+ * @author Jonathan Gilbert - Initial contribution
+ */
+@Component(service = ScriptEngineFactory.class)
+public final class GraalJSScriptEngineFactory implements ScriptEngineFactory {
+
+    @Override
+    public List<String> getScriptTypes() {
+        List<String> scriptTypes = new ArrayList<>();
+        GraalJSEngineFactory graalJSEngineFactory = new GraalJSEngineFactory();
+
+        scriptTypes.addAll(graalJSEngineFactory.getMimeTypes());
+        scriptTypes.addAll(graalJSEngineFactory.getExtensions());
+
+        return Collections.unmodifiableList(scriptTypes);
+    }
+
+    @Override
+    public void scopeValues(ScriptEngine scriptEngine, Map<String, Object> scopeValues) {
+        // noop; the are retrieved via modules, not injected
+    }
+
+    @Override
+    public ScriptEngine createScriptEngine(String scriptType) {
+        OpenhabGraalJSScriptEngine engine = new OpenhabGraalJSScriptEngine();
+        return new DebuggingGraalScriptEngine<>(engine);
+    }
+}

bundles/org.openhab.automation.jsscripting/src/main/java/org/openhab/automation/jsscripting/internal/ModuleLocator.java

@@ -0,0 +1,27 @@
+/**
+ * Copyright (c) 2010-2021 Contributors to the openHAB project
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License 2.0 which is available at
+ * http://www.eclipse.org/legal/epl-2.0
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+
+package org.openhab.automation.jsscripting.internal;
+
+import java.util.Optional;
+
+import org.graalvm.polyglot.Value;
+
+/**
+ * Locates modules from a module name
+ *
+ * @author Jonathan Gilbert - Initial contribution
+ */
+public interface ModuleLocator {
+    Optional<Value> locateModule(String name);
+}