From 1a47ca9b00387e0ac8ada49123cbdf219161f52c Mon Sep 17 00:00:00 2001
From: Miodec <jack@monkeytype.com>
Date: Wed, 5 Apr 2023 18:27:17 +0200
Subject: [PATCH] added start to first

---
 backend/src/api/schemas/result-schema.ts |  1 +
 frontend/src/ts/test/test-input.ts       | 15 ++++++++++++---
 frontend/src/ts/test/test-logic.ts       |  4 ++++
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/backend/src/api/schemas/result-schema.ts b/backend/src/api/schemas/result-schema.ts
index 96842bd3d..69400e5bf 100644
--- a/backend/src/api/schemas/result-schema.ts
+++ b/backend/src/api/schemas/result-schema.ts
@@ -55,6 +55,7 @@ const RESULT_SCHEMA = joi
       ),
     keyOverlap: joi.number().min(0),
     lastKeyToEnd: joi.number().min(0),
+    startToFirstKey: joi.number().min(0),
     lang: joi.string(),
     stringified: joi.string(),
     language: joi.string().required(),
diff --git a/frontend/src/ts/test/test-input.ts b/frontend/src/ts/test/test-input.ts
index e3986587b..9bc9cdc8a 100644
--- a/frontend/src/ts/test/test-input.ts
+++ b/frontend/src/ts/test/test-input.ts
@@ -62,6 +62,7 @@ interface Keypress {
 
 interface KeypressTimings {
   spacing: {
+    first: number;
     last: number;
     array: number[];
   };
@@ -216,6 +217,7 @@ export let accuracy = {
 };
 export let keypressTimings: KeypressTimings = {
   spacing: {
+    first: -1,
     last: -1,
     array: [],
   },
@@ -329,8 +331,10 @@ export function recordKeydownTime(key: string): void {
 
   if (keyDownData[key] !== undefined) return;
 
+  const now = performance.now();
+
   keyDownData[key] = {
-    timestamp: performance.now(),
+    timestamp: now,
     index: keypressTimings.duration.array.length,
   };
   keypressTimings.duration.array.push(0);
@@ -338,7 +342,7 @@ export function recordKeydownTime(key: string): void {
   updateOverlap(keyDownData[key].timestamp);
 
   if (keypressTimings.spacing.last !== -1) {
-    const diff = Math.abs(performance.now() - keypressTimings.spacing.last);
+    const diff = Math.abs(now - keypressTimings.spacing.last);
     keypressTimings.spacing.array.push(roundTo2(diff));
     if (spacingDebug) {
       console.log(
@@ -352,7 +356,10 @@ export function recordKeydownTime(key: string): void {
       );
     }
   }
-  keypressTimings.spacing.last = performance.now();
+  keypressTimings.spacing.last = now;
+  if (keypressTimings.spacing.first === -1) {
+    keypressTimings.spacing.first = now;
+  }
 }
 
 function updateOverlap(now: number): void {
@@ -372,6 +379,7 @@ function updateOverlap(now: number): void {
 export function resetKeypressTimings(): void {
   keypressTimings = {
     spacing: {
+      first: -1,
       last: -1,
       array: [],
     },
@@ -432,6 +440,7 @@ export function restart(): void {
   };
   keypressTimings = {
     spacing: {
+      first: -1,
       last: -1,
       array: [],
     },
diff --git a/frontend/src/ts/test/test-logic.ts b/frontend/src/ts/test/test-logic.ts
index 76042782d..9fa856093 100644
--- a/frontend/src/ts/test/test-logic.ts
+++ b/frontend/src/ts/test/test-logic.ts
@@ -1306,6 +1306,7 @@ interface CompletedEvent extends MonkeyTypes.Result<MonkeyTypes.Mode> {
   challenge?: string | null;
   keyOverlap: number;
   lastKeyToEnd: number;
+  startToFirstKey: number;
 }
 
 type PartialCompletedEvent = Omit<Partial<CompletedEvent>, "chartData"> & {
@@ -1382,6 +1383,9 @@ function buildCompletedEvent(difficultyFailed: boolean): CompletedEvent {
     lastKeyToEnd: Misc.roundTo2(
       TestStats.end - TestInput.keypressTimings.spacing.last
     ),
+    startToFirstKey: Misc.roundTo2(
+      TestInput.keypressTimings.spacing.first - TestStats.start
+    ),
     consistency: undefined,
     keyConsistency: undefined,
     funbox: Config.funbox,