refactor: scanning of the jsBundleRule for plugins (#2249)

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#### What type of PR is this?
/kind improvement
/area core
/milestone 2.0
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#### What this PR does / why we need it:
重构 JsBundle 获取方式，增加对 js entry 的文件校验如果不存在，则启用插件时不生成反向代理 APIs
#### Which issue(s) this PR fixes:

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Fixes #

#### Special notes for your reviewer:
/cc @halo-dev/sig-halo 
#### Does this PR introduce a user-facing change?

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src/main/java/run/halo/app/core/extension/Plugin.java

@@ -44,7 +44,7 @@ public class Plugin extends AbstractExtension {
     @JsonIgnore
     public PluginStatus statusNonNull() {
         if (this.status == null) {
-            return new PluginStatus();
+            this.status = new PluginStatus();
         }
         return status;
     }
@@ -87,7 +87,8 @@ public class Plugin extends AbstractExtension {
         @NonNull
         @JsonIgnore
         public List<String> extensionLocationsNonNull() {
-            return Objects.requireNonNullElseGet(extensionLocations, List::of);
+            this.extensionLocations = Objects.requireNonNullElseGet(extensionLocations, List::of);
+            return this.extensionLocations;
         }
     }
 

src/main/java/run/halo/app/core/extension/reconciler/PluginReconciler.java

@@ -10,14 +10,12 @@ import lombok.extern.slf4j.Slf4j;
 import org.pf4j.PluginRuntimeException;
 import org.pf4j.PluginState;
 import org.pf4j.PluginWrapper;
-import org.pf4j.RuntimeMode;
 import run.halo.app.core.extension.Plugin;
 import run.halo.app.extension.ExtensionClient;
 import run.halo.app.extension.controller.Reconciler;
 import run.halo.app.infra.utils.JsonUtils;
 import run.halo.app.plugin.HaloPluginManager;
 import run.halo.app.plugin.PluginStartingError;
-import run.halo.app.plugin.YamlPluginFinder;
 import run.halo.app.plugin.resources.JsBundleRuleProvider;
 import run.halo.app.plugin.resources.ReverseProxyRouterFunctionFactory;
 
@@ -83,8 +81,6 @@ public class PluginReconciler implements Reconciler {
             return;
         }
 
-        ensureSpecUpToDateWhenDevelopmentMode(pluginWrapper, plugin);
-
         if (!Objects.equals(pluginStatus.getPhase(), pluginWrapper.getPluginState())) {
             // Set to the correct state
             pluginStatus.setPhase(pluginWrapper.getPluginState());
@@ -134,12 +130,14 @@ public class PluginReconciler implements Reconciler {
         Plugin.PluginStatus status = plugin.statusNonNull();
         // TODO Check whether the JS bundle rule exists. If it does not exist, do not populate
         // populate stylesheet path
-        String jsBundleRoute = ReverseProxyRouterFunctionFactory.buildRoutePath(pluginName,
-            jsBundleRule.jsRule(pluginName));
-        String cssBundleRoute = ReverseProxyRouterFunctionFactory.buildRoutePath(pluginName,
-            jsBundleRule.cssRule(pluginName));
-        status.setEntry(jsBundleRoute);
-        status.setStylesheet(cssBundleRoute);
+        jsBundleRule.jsRule(pluginName)
+            .map(jsRule -> ReverseProxyRouterFunctionFactory.buildRoutePath(pluginName, jsRule))
+            .ifPresent(status::setEntry);
+
+        jsBundleRule.cssRule(pluginName)
+            .map(cssRule -> ReverseProxyRouterFunctionFactory.buildRoutePath(pluginName, cssRule))
+            .ifPresent(status::setStylesheet);
+
         status.setLastStartTime(Instant.now());
     }
 
@@ -170,18 +168,4 @@ public class PluginReconciler implements Reconciler {
             throw new PluginRuntimeException(startingError.getMessage());
         }
     }
-
-    private void ensureSpecUpToDateWhenDevelopmentMode(PluginWrapper pluginWrapper,
-        Plugin oldPlugin) {
-        if (RuntimeMode.DEPLOYMENT.equals(pluginWrapper.getRuntimeMode())) {
-            return;
-        }
-        YamlPluginFinder yamlPluginFinder = new YamlPluginFinder();
-        Plugin pluginFromPath = yamlPluginFinder.find(pluginWrapper.getPluginPath());
-        // ensure plugin spec is up to date
-        Plugin.PluginSpec pluginSpec = JsonUtils.deepCopy(pluginFromPath.getSpec());
-        if (!Objects.equals(oldPlugin.getSpec(), pluginSpec)) {
-            oldPlugin.setSpec(pluginSpec);
-        }
-    }
 }

src/main/java/run/halo/app/plugin/resources/JsBundleRuleProvider.java

@@ -1,7 +1,13 @@
 package run.halo.app.plugin.resources;
 
+import java.util.Optional;
+import org.pf4j.PluginWrapper;
+import org.springframework.core.io.DefaultResourceLoader;
+import org.springframework.lang.NonNull;
 import org.springframework.stereotype.Component;
-import run.halo.app.core.extension.ReverseProxy;
+import run.halo.app.core.extension.ReverseProxy.FileReverseProxyProvider;
+import run.halo.app.core.extension.ReverseProxy.ReverseProxyRule;
+import run.halo.app.plugin.HaloPluginManager;
 
 /**
  * TODO Optimize code to support user customize js bundle rules.
@@ -11,6 +17,20 @@ import run.halo.app.core.extension.ReverseProxy;
  */
 @Component
 public class JsBundleRuleProvider {
+    private static final String JS_LOCATION = "/admin/main.js";
+    private static final String CSS_LOCATION = "/admin/style.css";
+
+    private static final FileReverseProxyProvider JS_FILE_PROXY =
+        new FileReverseProxyProvider("admin", "main.js");
+
+    private static final FileReverseProxyProvider CSS_FILE_PROXY =
+        new FileReverseProxyProvider("admin", "style.css");
+
+    private final HaloPluginManager haloPluginManager;
+
+    public JsBundleRuleProvider(HaloPluginManager haloPluginManager) {
+        this.haloPluginManager = haloPluginManager;
+    }
 
     /**
      * Gets plugin js bundle rule.
@@ -18,10 +38,11 @@ public class JsBundleRuleProvider {
      * @param pluginName plugin name
      * @return a js bundle rule
      */
-    public ReverseProxy.ReverseProxyRule jsRule(String pluginName) {
-        ReverseProxy.FileReverseProxyProvider
-            file = new ReverseProxy.FileReverseProxyProvider("admin", "main.js");
-        return new ReverseProxy.ReverseProxyRule("/admin/main.js", file);
+    public Optional<ReverseProxyRule> jsRule(String pluginName) {
+        return Optional.of(JS_LOCATION)
+            .filter(path -> createResourceLoader(pluginName)
+                .getResource(path).exists())
+            .map(path -> new ReverseProxyRule(path, JS_FILE_PROXY));
     }
 
     /**
@@ -30,9 +51,21 @@ public class JsBundleRuleProvider {
      * @param pluginName plugin name
      * @return a stylesheet bundle rule
      */
-    public ReverseProxy.ReverseProxyRule cssRule(String pluginName) {
-        ReverseProxy.FileReverseProxyProvider
-            file = new ReverseProxy.FileReverseProxyProvider("admin", "style.css");
-        return new ReverseProxy.ReverseProxyRule("/admin/style.css", file);
+    public Optional<ReverseProxyRule> cssRule(String pluginName) {
+        return Optional.of(CSS_LOCATION)
+            .filter(path -> createResourceLoader(pluginName)
+                .getResource(path)
+                .exists())
+            .map(path -> new ReverseProxyRule(path, CSS_FILE_PROXY));
     }
+
+    @NonNull
+    private DefaultResourceLoader createResourceLoader(String pluginName) {
+        PluginWrapper plugin = haloPluginManager.getPlugin(pluginName);
+        if (plugin == null) {
+            return new DefaultResourceLoader();
+        }
+        return new DefaultResourceLoader(plugin.getPluginClassLoader());
+    }
+
 }

src/main/java/run/halo/app/plugin/resources/ReverseProxyRouterFunctionFactory.java

@@ -114,15 +114,8 @@ public class ReverseProxyRouterFunctionFactory {
 
     private List<ReverseProxyRule> getJsBundleRules(String pluginId) {
         List<ReverseProxyRule> rules = new ArrayList<>(2);
-        ReverseProxyRule jsRule = jsBundleRuleProvider.jsRule(pluginId);
-        if (jsRule != null) {
-            rules.add(jsRule);
-        }
-
-        ReverseProxyRule cssRule = jsBundleRuleProvider.cssRule(pluginId);
-        if (cssRule != null) {
-            rules.add(cssRule);
-        }
+        jsBundleRuleProvider.jsRule(pluginId).ifPresent(rules::add);
+        jsBundleRuleProvider.cssRule(pluginId).ifPresent(rules::add);
         return rules;
     }
 

src/test/java/run/halo/app/core/extension/reconciler/PluginReconcilerTest.java

@@ -19,7 +19,6 @@ import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.pf4j.PluginState;
 import org.pf4j.PluginWrapper;
-import org.pf4j.RuntimeMode;
 import run.halo.app.core.extension.Plugin;
 import run.halo.app.extension.ExtensionClient;
 import run.halo.app.extension.controller.Reconciler;
@@ -50,11 +49,10 @@ class PluginReconcilerTest {
 
     @BeforeEach
     void setUp() {
-        JsBundleRuleProvider jsBundleRule = new JsBundleRuleProvider();
+        JsBundleRuleProvider jsBundleRule = new JsBundleRuleProvider(haloPluginManager);
         pluginReconciler = new PluginReconciler(extensionClient, haloPluginManager, jsBundleRule);
 
         when(haloPluginManager.getPlugin(any())).thenReturn(pluginWrapper);
-        when(pluginWrapper.getRuntimeMode()).thenReturn(RuntimeMode.DEPLOYMENT);
         when(haloPluginManager.getUnresolvedPlugins()).thenReturn(List.of());
     }
 

src/test/java/run/halo/app/plugin/resources/ReverseProxyRouterFunctionFactoryTest.java

@@ -17,6 +17,7 @@ import org.springframework.web.reactive.function.server.ServerResponse;
 import run.halo.app.core.extension.ReverseProxy;
 import run.halo.app.extension.ExtensionClient;
 import run.halo.app.extension.Metadata;
+import run.halo.app.plugin.HaloPluginManager;
 import run.halo.app.plugin.PluginApplicationContext;
 import run.halo.app.plugin.PluginConst;
 
@@ -34,12 +35,14 @@ class ReverseProxyRouterFunctionFactoryTest {
 
     @Mock
     private PluginApplicationContext pluginApplicationContext;
+    @Mock
+    private HaloPluginManager haloPluginManager;
 
     private ReverseProxyRouterFunctionFactory reverseProxyRouterFunctionFactory;
 
     @BeforeEach
     void setUp() {
-        JsBundleRuleProvider jsBundleRuleProvider = new JsBundleRuleProvider();
+        JsBundleRuleProvider jsBundleRuleProvider = new JsBundleRuleProvider(haloPluginManager);
         reverseProxyRouterFunctionFactory = new ReverseProxyRouterFunctionFactory(extensionClient,
             jsBundleRuleProvider);