Add plugin support to palette manager

packages/node_modules/@node-red/registry/lib/plugins.js

@@ -39,6 +39,8 @@ function registerPlugin(nodeSetId,id,definition) {
         pluginSettings[id] = definition.settings;
     }
 
+    // reset the cache when a new plugin is incoming!
+    pluginConfigCache = {};
 
     if (definition.onadd && typeof definition.onadd === 'function') {
         definition.onadd();
@@ -55,29 +57,47 @@ function getPluginsByType(type) {
 }
 
 function getPluginConfigs(lang) {
+    // we're not re-using getPluginConfig() here,
+    // to avoid calling registry.getModuleList() multiple times!
+
     if (!pluginConfigCache[lang]) {
         var result = "";
-        var script = "";
         var moduleConfigs = registry.getModuleList();
         for (var module in moduleConfigs) {
             /* istanbul ignore else */
             if (moduleConfigs.hasOwnProperty(module)) {
-                var plugins = moduleConfigs[module].plugins;
-                for (var plugin in plugins) {
-                    if (plugins.hasOwnProperty(plugin)) {
-                        var config = plugins[plugin];
-                        if (config.enabled && !config.err && config.config) {
-                            result += "\n<!-- --- [red-plugin:"+config.id+"] --- -->\n";
-                            result += config.config;
-                        }
-                    }
-                }
+                result += get_config_of_plugins(moduleConfigs[module].plugins);
             }
         }
         pluginConfigCache[lang] = result;
     }
     return pluginConfigCache[lang];
 }
+
+function getPluginConfig(id, lang) {
+    let result = '';
+    let moduleConfigs = registry.getModuleList();
+    if (moduleConfigs.hasOwnProperty(id)) {
+        result = get_config_of_plugins(moduleConfigs[id].plugins);
+    }
+    return result;
+}
+
+// helper function to avoid code duplication
+function get_config_of_plugins(plugins) {
+    let result = '';
+    for (let plugin in plugins) {
+        if (plugins.hasOwnProperty(plugin)) {
+            let config = plugins[plugin];
+            if (config.enabled && !config.err && config.config) {
+                result += "\n<!-- --- [red-plugin:"+config.id+"] --- -->\n";
+                result += config.config;
+            }
+        }
+    }
+    return result;
+}
+
 function getPluginList() {
     var list = [];
     var moduleConfigs = registry.getModuleList();
@@ -142,12 +162,51 @@ function exportPluginSettings(safeSettings) {
     return safeSettings;
 }
 
+function removeModule(moduleId) {
+
+    // clean the (plugin) registry when a module is removed / uninstalled
+
+    let pluginList = [];
+    let module = registry.getModule(moduleId);
+    let keys = Object.keys(module.plugins ?? {});
+    keys.forEach( key => {
+        let _plugins = module.plugins[key].plugins ?? [];
+        _plugins.forEach( plugin => {
+            let id = plugin.id;
+
+            if (plugin.onremove && typeof plugin.onremove === 'function') {
+                plugin.onremove();
+            }
+
+            delete pluginToId[id];
+            delete plugins[id];
+            delete pluginSettings[id];
+            pluginConfigCache = {};
+
+            let psbtype = pluginsByType[plugin.type] ?? [];
+            for (let i=psbtype.length; i>0; i--) {
+                let pbt = psbtype[i-1];
+                if (pbt.id == id) {
+                    psbtype.splice(i-1, 1);
+                }
+            }
+        })
+
+        pluginList.push(registry.filterNodeInfo(module.plugins[key]));
+        
+    })
+
+    return pluginList;
+}
+
 module.exports = {
     init,
     registerPlugin,
     getPlugin,
     getPluginsByType,
     getPluginConfigs,
+    getPluginConfig,
     getPluginList,
-    exportPluginSettings
+    exportPluginSettings,
+    removeModule
 }