Output telemetry on react state changes in MRVA results view

extensions/ql-vscode/src/view/common/CodePaths/CodePaths.tsx

@@ -1,5 +1,5 @@
 import * as React from "react";
-import { useRef, useState } from "react";
+import { useRef } from "react";
 import styled from "styled-components";
 import { VSCodeLink } from "@vscode/webview-ui-toolkit/react";
 
@@ -11,6 +11,7 @@ import {
   ResultSeverity,
 } from "../../../remote-queries/shared/analysis-result";
 import { CodePathsOverlay } from "./CodePathsOverlay";
+import { useStateWithTelemetry } from "../Telemetry";
 
 const ShowPathsLink = styled(VSCodeLink)`
   cursor: pointer;
@@ -29,7 +30,11 @@ export const CodePaths = ({
   message,
   severity,
 }: CodePathsProps) => {
-  const [isOpen, setIsOpen] = useState(false);
+  const [isOpen, setIsOpen] = useStateWithTelemetry(
+    false,
+    "code-path-is-open",
+    (v) => v === true,
+  );
 
   const linkRef = useRef<HTMLAnchorElement>(null);
 

extensions/ql-vscode/src/view/common/CodePaths/CodePathsOverlay.tsx

@@ -1,5 +1,4 @@
 import * as React from "react";
-import { useState } from "react";
 import styled from "styled-components";
 
 import {
@@ -7,6 +6,7 @@ import {
   CodeFlow,
   ResultSeverity,
 } from "../../../remote-queries/shared/analysis-result";
+import { useStateWithTelemetry } from "../Telemetry";
 import { SectionTitle } from "../SectionTitle";
 import { VerticalSpace } from "../VerticalSpace";
 import { CodeFlowsDropdown } from "./CodeFlowsDropdown";
@@ -76,7 +76,10 @@ export const CodePathsOverlay = ({
   severity,
   onClose,
 }: CodePathsOverlayProps) => {
-  const [selectedCodeFlow, setSelectedCodeFlow] = useState(codeFlows[0]);
+  const [selectedCodeFlow, setSelectedCodeFlow] = useStateWithTelemetry(
+    codeFlows[0],
+    "code-flow-selected",
+  );
 
   return (
     <OverlayContainer>

extensions/ql-vscode/src/view/common/Telemetry.ts

@@ -0,0 +1,52 @@
+import * as React from "react";
+import { useState } from "react";
+import { vscode } from "../vscode-api";
+
+/**
+ * Wraps `React.useState` to output telemetry events whenever the value changes.
+ *
+ * The only catch is that when using a predicate to filter which values output telemetry,
+ * the setter only accepts a raw value, instead of a `(prevState: S) => S` function.
+ *
+ * @param defaultValue Default value to pass to React.useState
+ * @param telemetryAction Name of the telemetry event to output
+ * @param filterTelemetryOnValue If provided, only output telemetry events when the predicate returns true. If not provided always outputs telemetry.
+ * @returns A value and a setter function, just as if from `React.useState`
+ */
+export function useStateWithTelemetry<S>(
+  defaultValue: S | (() => S),
+  telemetryAction: string,
+): [S, React.Dispatch<React.SetStateAction<S>>];
+export function useStateWithTelemetry<S>(
+  defaultValue: S | (() => S),
+  telemetryAction: string,
+  filterTelemetryOnValue: (value: S) => boolean,
+): [S, React.Dispatch<S>];
+export function useStateWithTelemetry<S>(
+  defaultValue: S | (() => S),
+  telemetryAction: string,
+  filterTelemetryOnValue?: (value: S) => boolean,
+): [S, React.Dispatch<S> | React.Dispatch<React.SetStateAction<S>>] {
+  const [value, setter] = useState<S>(defaultValue);
+  if (filterTelemetryOnValue === undefined) {
+    const setterWithTelemetry = (x: React.SetStateAction<S>) => {
+      vscode.postMessage({
+        t: "telemetry",
+        action: telemetryAction,
+      });
+      setter(x);
+    };
+    return [value, setterWithTelemetry];
+  } else {
+    const setterWithTelemetry = (x: S) => {
+      if (filterTelemetryOnValue(x)) {
+        vscode.postMessage({
+          t: "telemetry",
+          action: telemetryAction,
+        });
+      }
+      setter(x);
+    };
+    return [value, setterWithTelemetry];
+  }
+}

extensions/ql-vscode/src/view/remote-queries/RawResultsTable.tsx

@@ -1,5 +1,4 @@
 import * as React from "react";
-import { useState } from "react";
 import styled from "styled-components";
 import { VSCodeLink } from "@vscode/webview-ui-toolkit/react";
 import {
@@ -10,6 +9,7 @@ import {
 import { tryGetRemoteLocation } from "../../pure/bqrs-utils";
 import TextButton from "./TextButton";
 import { convertNonPrintableChars } from "../../text-utils";
+import { useStateWithTelemetry } from "../common/Telemetry";
 
 const numOfResultsInContractedMode = 5;
 
@@ -100,7 +100,11 @@ const RawResultsTable = ({
   fileLinkPrefix,
   sourceLocationPrefix,
 }: RawResultsTableProps) => {
-  const [tableExpanded, setTableExpanded] = useState(false);
+  const [tableExpanded, setTableExpanded] = useStateWithTelemetry(
+    false,
+    "raw-results-table-expanded",
+    (v) => v === true,
+  );
   const numOfResultsToShow = tableExpanded
     ? results.rows.length
     : numOfResultsInContractedMode;

extensions/ql-vscode/src/view/remote-queries/RemoteQueries.tsx

@@ -433,7 +433,7 @@ const AnalysesResults = ({
   sort: Sort;
 }) => {
   const totalAnalysesResults = sumAnalysesResults(analysesResults);
-  const [filterValue, setFilterValue] = React.useState("");
+  const [filterValue, setFilterValue] = useState("");
 
   if (totalResults === 0) {
     return <></>;

extensions/ql-vscode/src/view/variant-analysis/RepoRow.tsx

@@ -24,6 +24,7 @@ import { vscode } from "../vscode-api";
 import { AnalyzedRepoItemContent } from "./AnalyzedRepoItemContent";
 import StarCount from "../common/StarCount";
 import { LastUpdated } from "../common/LastUpdated";
+import { useStateWithTelemetry } from "../common/Telemetry";
 
 // This will ensure that these icons have a className which we can use in the TitleContainer
 const ExpandCollapseCodicon = styled(Codicon)``;
@@ -167,7 +168,11 @@ export const RepoRow = ({
   selected,
   onSelectedChange,
 }: RepoRowProps) => {
-  const [isExpanded, setExpanded] = useState(false);
+  const [isExpanded, setExpanded] = useStateWithTelemetry(
+    false,
+    "variant-analysis-repo-row-expanded",
+    (v) => v === true,
+  );
   const resultsLoaded = !!interpretedResults || !!rawResults;
   const [resultsLoading, setResultsLoading] = useState(false);
 
@@ -182,7 +187,7 @@ export const RepoRow = ({
       downloadStatus !==
         VariantAnalysisScannedRepositoryDownloadStatus.Succeeded
     ) {
-      setExpanded((oldIsExpanded) => !oldIsExpanded);
+      setExpanded(!isExpanded);
       return;
     }
 
@@ -198,6 +203,8 @@ export const RepoRow = ({
     repository.fullName,
     status,
     downloadStatus,
+    isExpanded,
+    setExpanded,
   ]);
 
   useEffect(() => {

extensions/ql-vscode/src/view/variant-analysis/VariantAnalysis.tsx

@@ -16,6 +16,7 @@ import {
   defaultFilterSortState,
   RepositoriesFilterSortState,
 } from "../../pure/variant-analysis-filter-sort";
+import { useStateWithTelemetry } from "../common/Telemetry";
 
 export type VariantAnalysisProps = {
   variantAnalysis?: VariantAnalysisDomainModel;
@@ -60,11 +61,16 @@ export function VariantAnalysis({
   const [repoResults, setRepoResults] =
     useState<VariantAnalysisScannedRepositoryResult[]>(initialRepoResults);
 
-  const [selectedRepositoryIds, setSelectedRepositoryIds] = useState<number[]>(
+  const [selectedRepositoryIds, setSelectedRepositoryIds] =
+    useStateWithTelemetry<number[]>(
       [],
+      "variant-analysis-selected-repository-ids",
     );
   const [filterSortState, setFilterSortState] =
-    useState<RepositoriesFilterSortState>(defaultFilterSortState);
+    useStateWithTelemetry<RepositoriesFilterSortState>(
+      defaultFilterSortState,
+      "variant-analysis-filter-sort-state",
+    );
 
   useEffect(() => {
     const listener = (evt: MessageEvent) => {