fix: type declaration

server/parsers/ppl_parser.ts

@@ -3,16 +3,18 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+import { MessageParser } from '../types';
+
 const extractPPLQueries = (content: string) => {
     return Array.from(content.matchAll(/(^|[\n\r]|:)\s*(source\s*=\s*.+)/gi)).map(
         (match) => match[2]
     );
 };
 
-export const PPLParsers = {
+export const PPLParsers: MessageParser = {
     id: 'ppl_visualization_message',
     async parserProvider(interaction) {
-        const ppls: string[] = interaction.additional_info?.["PPLTool.output"]?.flatMap((item: string) => {
+        const ppls: string[] = (interaction.additional_info?.["PPLTool.output"] as string[] | null)?.flatMap((item: string) => {
             let ppl: string = ""
             try {
                 const outputResp = JSON.parse(item);
@@ -22,7 +24,7 @@ export const PPLParsers = {
             }
 
             return extractPPLQueries(ppl);
-        });
+        }) || [];
 
         if (!ppls.length) return [];
 

server/plugin.ts

@@ -19,22 +19,20 @@ import {
   searchSavedObject,
   visualizationSavedObject,
 } from './saved_objects/observability_saved_object';
-import { ObservabilityPluginSetup, ObservabilityPluginStart } from './types';
+import { ObservabilityPluginSetup, ObservabilityPluginStart, AssistantPluginSetup } from './types';
 import { PPLParsers } from './parsers/ppl_parser';
 
 export class ObservabilityPlugin
-  implements Plugin<ObservabilityPluginSetup, ObservabilityPluginStart, {
-    assistantDashboards?: {
-      registerMessageParser: () => void
-    }
-  }> {
+  implements Plugin<ObservabilityPluginSetup, ObservabilityPluginStart> {
   private readonly logger: Logger;
 
   constructor(initializerContext: PluginInitializerContext) {
     this.logger = initializerContext.logger.get();
   }
 
-  public setup(core: CoreSetup, deps) {
+  public setup(core: CoreSetup, deps: {
+    assistantDashboards?: AssistantPluginSetup
+  }) {
     const { assistantDashboards } = deps;
     this.logger.debug('Observability: Setup');
     const router = core.http.createRouter();
@@ -127,7 +125,7 @@ export class ObservabilityPlugin
       },
     }));
 
-    assistantDashboards.registerMessageParser(PPLParsers);
+    assistantDashboards?.registerMessageParser(PPLParsers);
 
     return {};
   }

server/types.ts

@@ -7,3 +7,11 @@
 export interface ObservabilityPluginSetup {}
 // eslint-disable-next-line @typescript-eslint/no-empty-interface
 export interface ObservabilityPluginStart {}
+
+/**
+ * Introduce a compile dependency on dashboards-assistant
+ * as observerability need some types from the plugin.
+ * It will gives an type error when dashboards-assistant is not installed so add a ts-ignore to suppress the error.
+ */
+// @ts-ignore
+export type { AssistantPluginSetup, MessageParser } from "../../dashboards-assistant/server";