From 8eff962cab608341a6f2fedc640a0e32d96f26e2 Mon Sep 17 00:00:00 2001
From: altaf-creator <dev@altafcreator.com>
Date: Sun, 9 Nov 2025 11:15:19 +0800
Subject: pain

---
 .../web-vitals/src/lib/interactions.ts             | 139 +++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 frontend-old/node_modules/web-vitals/src/lib/interactions.ts

(limited to 'frontend-old/node_modules/web-vitals/src/lib/interactions.ts')

diff --git a/frontend-old/node_modules/web-vitals/src/lib/interactions.ts b/frontend-old/node_modules/web-vitals/src/lib/interactions.ts
new file mode 100644
index 0000000..fbd0751
--- /dev/null
+++ b/frontend-old/node_modules/web-vitals/src/lib/interactions.ts
@@ -0,0 +1,139 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {getInteractionCount} from './polyfills/interactionCountPolyfill.js';
+
+interface Interaction {
+  id: number;
+  latency: number;
+  entries: PerformanceEventTiming[];
+}
+
+interface EntryPreProcessingHook {
+  (entry: PerformanceEventTiming): void;
+}
+
+// A list of longest interactions on the page (by latency) sorted so the
+// longest one is first. The list is at most MAX_INTERACTIONS_TO_CONSIDER long.
+export const longestInteractionList: Interaction[] = [];
+
+// A mapping of longest interactions by their interaction ID.
+// This is used for faster lookup.
+export const longestInteractionMap: Map<number, Interaction> = new Map();
+
+// The default `durationThreshold` used across this library for observing
+// `event` entries via PerformanceObserver.
+export const DEFAULT_DURATION_THRESHOLD = 40;
+
+// Used to store the interaction count after a bfcache restore, since p98
+// interaction latencies should only consider the current navigation.
+let prevInteractionCount = 0;
+
+/**
+ * Returns the interaction count since the last bfcache restore (or for the
+ * full page lifecycle if there were no bfcache restores).
+ */
+const getInteractionCountForNavigation = () => {
+  return getInteractionCount() - prevInteractionCount;
+};
+
+export const resetInteractions = () => {
+  prevInteractionCount = getInteractionCount();
+  longestInteractionList.length = 0;
+  longestInteractionMap.clear();
+};
+
+/**
+ * Returns the estimated p98 longest interaction based on the stored
+ * interaction candidates and the interaction count for the current page.
+ */
+export const estimateP98LongestInteraction = () => {
+  const candidateInteractionIndex = Math.min(
+    longestInteractionList.length - 1,
+    Math.floor(getInteractionCountForNavigation() / 50),
+  );
+
+  return longestInteractionList[candidateInteractionIndex];
+};
+
+// To prevent unnecessary memory usage on pages with lots of interactions,
+// store at most 10 of the longest interactions to consider as INP candidates.
+const MAX_INTERACTIONS_TO_CONSIDER = 10;
+
+/**
+ * A list of callback functions to run before each entry is processed.
+ * Exposing this list allows the attribution build to hook into the
+ * entry processing pipeline.
+ */
+export const entryPreProcessingCallbacks: EntryPreProcessingHook[] = [];
+
+/**
+ * Takes a performance entry and adds it to the list of worst interactions
+ * if its duration is long enough to make it among the worst. If the
+ * entry is part of an existing interaction, it is merged and the latency
+ * and entries list is updated as needed.
+ */
+export const processInteractionEntry = (entry: PerformanceEventTiming) => {
+  entryPreProcessingCallbacks.forEach((cb) => cb(entry));
+
+  // Skip further processing for entries that cannot be INP candidates.
+  if (!(entry.interactionId || entry.entryType === 'first-input')) return;
+
+  // The least-long of the 10 longest interactions.
+  const minLongestInteraction =
+    longestInteractionList[longestInteractionList.length - 1];
+
+  const existingInteraction = longestInteractionMap.get(entry.interactionId!);
+
+  // Only process the entry if it's possibly one of the ten longest,
+  // or if it's part of an existing interaction.
+  if (
+    existingInteraction ||
+    longestInteractionList.length < MAX_INTERACTIONS_TO_CONSIDER ||
+    entry.duration > minLongestInteraction.latency
+  ) {
+    // If the interaction already exists, update it. Otherwise create one.
+    if (existingInteraction) {
+      // If the new entry has a longer duration, replace the old entries,
+      // otherwise add to the array.
+      if (entry.duration > existingInteraction.latency) {
+        existingInteraction.entries = [entry];
+        existingInteraction.latency = entry.duration;
+      } else if (
+        entry.duration === existingInteraction.latency &&
+        entry.startTime === existingInteraction.entries[0].startTime
+      ) {
+        existingInteraction.entries.push(entry);
+      }
+    } else {
+      const interaction = {
+        id: entry.interactionId!,
+        latency: entry.duration,
+        entries: [entry],
+      };
+      longestInteractionMap.set(interaction.id, interaction);
+      longestInteractionList.push(interaction);
+    }
+
+    // Sort the entries by latency (descending) and keep only the top ten.
+    longestInteractionList.sort((a, b) => b.latency - a.latency);
+    if (longestInteractionList.length > MAX_INTERACTIONS_TO_CONSIDER) {
+      longestInteractionList
+        .splice(MAX_INTERACTIONS_TO_CONSIDER)
+        .forEach((i) => longestInteractionMap.delete(i.id));
+    }
+  }
+};
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