telemetry(amazonq chat): numberOfCodeBlocks aws#4755

Problem
The Q chat telemetry event recordAddMessage is missing the required parameter cwsprChatResponseCodeSnippetCount for AB testing.

Solution
Count the three back ticks(```) to find out total number of code blocks in the generated message response.

Author: laileni-aws

.changes/next-release/Feature-8bfddf4b-d53f-451c-9b0e-ce8d2b8df54f.json

@@ -0,0 +1,4 @@
+{
+	"type": "Feature",
+	"description": "Amazon Q Chat: Added  metric parameters to recordAddMessage telemetry event."
+}

packages/core/src/codewhisperer/client/user-service-2.json

@@ -344,7 +344,8 @@
                 "timeBetweenChunks": { "shape": "TimeBetweenChunks" },
                 "fullResponselatency": { "shape": "Double" },
                 "requestLength": { "shape": "Integer" },
-                "responseLength": { "shape": "Integer" }
+                "responseLength": { "shape": "Integer" },
+                "numberOfCodeBlocks": { "shape": "Integer" }
             }
         },
         "ChatHistory": {

packages/core/src/codewhispererChat/controllers/chat/messenger/messenger.ts

@@ -89,6 +89,16 @@ export class Messenger {
             )
         )
     }
+
+    public countTotalNumberOfCodeBlocks(message: string): number {
+        if (message === undefined) {
+            return 0
+        }
+        const countOfCodeBlocks = message.match(/^```/gm)
+        const numberOfTripleBackTicksInMarkdown = countOfCodeBlocks ? countOfCodeBlocks.length : 0
+        return Math.floor(numberOfTripleBackTicksInMarkdown / 2)
+    }
+
     public async sendAIResponse(
         response: GenerateAssistantResponseCommandOutput,
         session: ChatSession,
@@ -265,6 +275,7 @@ export class Messenger {
                     messageID,
                     responseCode,
                     codeReferenceCount: codeReference.length,
+                    totalNumberOfCodeBlocksInResponse: this.countTotalNumberOfCodeBlocks(message),
                 })
             })
     }

packages/core/src/codewhispererChat/controllers/chat/model.ts

@@ -76,6 +76,7 @@ export interface PromptAnswer {
     messageID: string
     responseCode: number
     codeReferenceCount: number
+    totalNumberOfCodeBlocksInResponse: number
 }
 
 export interface StopResponseMessage {

packages/core/src/codewhispererChat/controllers/chat/telemetryHelper.ts

@@ -321,7 +321,7 @@ export class CWCTelemetryHelper {
             cwsprChatProgrammingLanguage: triggerPayload.fileLanguage,
             cwsprChatActiveEditorTotalCharacters: triggerPayload.fileText?.length,
             cwsprChatActiveEditorImportCount: triggerPayload.codeQuery?.fullyQualifiedNames?.used?.length,
-            cwsprChatResponseCodeSnippetCount: 0, // TODO
+            cwsprChatResponseCodeSnippetCount: message.totalNumberOfCodeBlocksInResponse,
             cwsprChatResponseCode: message.responseCode,
             cwsprChatSourceLinkCount: message.suggestionCount,
             cwsprChatReferencesCount: message.codeReferenceCount,
@@ -353,6 +353,7 @@ export class CWCTelemetryHelper {
                         fullResponselatency: event.cwsprChatFullResponseLatency,
                         requestLength: event.cwsprChatRequestLength,
                         responseLength: event.cwsprChatResponseLength,
+                        numberOfCodeBlocks: event.cwsprChatResponseCodeSnippetCount,
                     },
                 },
             })