From 482b1c8db5cfeaa20d75ce92fcb10f3ca8433633 Mon Sep 17 00:00:00 2001
From: Factiven <dabinaya.fathan@gmail.com>
Date: Fri, 14 Apr 2023 00:07:02 +0700
Subject: Update 5th

---
 pages/components/scrollTracker.js | 146 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 pages/components/scrollTracker.js

(limited to 'pages/components/scrollTracker.js')

diff --git a/pages/components/scrollTracker.js b/pages/components/scrollTracker.js
new file mode 100644
index 0000000..66419bb
--- /dev/null
+++ b/pages/components/scrollTracker.js
@@ -0,0 +1,146 @@
+import { useState, useEffect } from "react";
+import { motion as m, AnimatePresence } from "framer-motion";
+
+const ScrollTracker = () => {
+  const [scrollPercentage, setScrollPercentage] = useState(0);
+  const [scrolling, setScrolling] = useState(false);
+  //   console.log(id);
+
+  function handleUnload() {
+    const currentChapter = localStorage.getItem("currentChapterId");
+    const scrollData = JSON.parse(localStorage.getItem("watchedManga")) || [];
+    const scroll = localStorage.getItem("scrollPercentage");
+    if (scroll < 5) {
+      return;
+    }
+
+    const existingDataIndex = scrollData.findIndex(
+      (data) => data.id === currentChapter
+    );
+    if (existingDataIndex !== -1) {
+      // Update existing data
+      scrollData[existingDataIndex].timestamp = Date.now();
+      scrollData[existingDataIndex].percentage = parseFloat(
+        localStorage.getItem("scrollPercentage")
+      );
+    } else {
+      // Add new data
+      scrollData.push({
+        timestamp: Date.now(),
+        percentage: parseFloat(localStorage.getItem("scrollPercentage")),
+        id: currentChapter,
+      });
+    }
+
+    localStorage.setItem("watchedManga", JSON.stringify(scrollData));
+  }
+
+  function handlePageHide() {
+    localStorage.setItem("scrollPercentage", scrollPercentage);
+    handleUnload;
+  }
+
+  // console.log(data?.id);
+
+  useEffect(() => {
+    function handleScroll() {
+      const scrollTop = document.documentElement.scrollTop;
+      const scrollHeight =
+        document.documentElement.scrollHeight -
+        document.documentElement.clientHeight;
+      const percentage = (scrollTop / scrollHeight) * 100;
+      setScrollPercentage(percentage);
+      localStorage.setItem("scrollPercentage", percentage);
+    }
+
+    function handlePageshow() {
+      const currentChapter = localStorage.getItem("currentChapterId");
+      const lastScrollPercentage =
+        JSON.parse(localStorage.getItem("watchedManga"))
+          ?.filter((data) => data.id === currentChapter)
+          .map((data) => data.percentage) || 0;
+
+      if (lastScrollPercentage >= 95) {
+        return;
+      }
+
+      const scrollTop =
+        (lastScrollPercentage / 100) *
+        (document.documentElement.scrollHeight -
+          document.documentElement.clientHeight);
+      document.documentElement.scrollTop = scrollTop;
+    }
+
+    window.addEventListener("scroll", handleScroll);
+    window.addEventListener("pageshow", handlePageshow);
+    window.addEventListener("beforeunload", handleUnload);
+    window.addEventListener("pagehide", handlePageHide);
+
+    return () => {
+      window.removeEventListener("scroll", handleScroll);
+      window.removeEventListener("pageshow", handlePageshow);
+      window.removeEventListener("beforeunload", handleUnload);
+      window.removeEventListener("pagehide", handlePageHide);
+    };
+  }, []);
+
+  useEffect(() => {
+    if (scrollPercentage > 5) {
+      setScrolling(true);
+    } else {
+      setScrolling(false);
+    }
+  }, [scrollPercentage]);
+
+  function handleScrollTop(e) {
+    e.preventDefault();
+    window.scrollTo({
+      top: 0,
+      behavior: "smooth",
+    });
+  }
+
+  // console.log(scrollPercentage);
+
+  return (
+    <>
+      <AnimatePresence>
+        {scrolling && (
+          <m.div
+            key="back-to-top-button"
+            initial={{ opacity: 0, x: 100 }}
+            animate={{ opacity: 1, x: 0 }}
+            exit={{ opacity: 0 }}
+            className="fixed lg:right-10 lg:bottom-10 cursor-pointer text-white bottom-9 right-20 rounded-md z-40 bg-[#121212] hover:bg-[#2d303a] p-2 lg:p-3"
+            onClick={handleScrollTop}
+          >
+            <svg
+              xmlns="http://www.w3.org/2000/svg"
+              fill="none"
+              viewBox="0 0 24 24"
+              strokeWidth="1.5"
+              stroke="currentColor"
+              className="w-6 h-6"
+            >
+              <path
+                strokeLinecap="round"
+                strokeLinejoin="round"
+                d="M4.5 15.75l7.5-7.5 7.5 7.5"
+              />
+            </svg>
+          </m.div>
+        )}
+      </AnimatePresence>
+      <div className="fixed bottom-0 w-screen z-40">
+        <div className="h-1 w-full relative">
+          <div
+            className="absolute top-0 left-0 bg-[#ff8a57] h-1"
+            style={{ width: `${scrollPercentage}%` }}
+          ></div>
+        </div>
+      </div>
+    </>
+  );
+};
+
+export default ScrollTracker;
-- 
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