From 51b18b763fa4c4752fcd24d3f7b090d04cbd6972 Mon Sep 17 00:00:00 2001
From: Willian Mitsuda <wmitsuda@gmail.com>
Date: Wed, 1 Sep 2021 17:40:42 -0300
Subject: [PATCH] Extract common camera scan code; apply it to home also

---
 src/Home.tsx                 | 30 ++++++++++++++------
 src/Title.tsx                | 46 +++---------------------------
 src/search/CameraScanner.tsx | 54 ++++++++++++++++++++++++++++++++++++
 3 files changed, 80 insertions(+), 50 deletions(-)
 create mode 100644 src/search/CameraScanner.tsx

diff --git a/src/Home.tsx b/src/Home.tsx
index 31ecb9a..6fb58c8 100644
--- a/src/Home.tsx
+++ b/src/Home.tsx
@@ -3,7 +3,9 @@ import { NavLink, useHistory } from "react-router-dom";
 import { commify } from "@ethersproject/units";
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
 import { faBurn } from "@fortawesome/free-solid-svg-icons/faBurn";
+import { faQrcode } from "@fortawesome/free-solid-svg-icons/faQrcode";
 import Logo from "./Logo";
+import CameraScanner from "./search/CameraScanner";
 import Timestamp from "./components/Timestamp";
 import { RuntimeContext } from "./useRuntime";
 import { useLatestBlock } from "./useLatestBlock";
@@ -30,11 +32,13 @@ const Home: React.FC = () => {
   };
 
   const latestBlock = useLatestBlock(provider);
+  const [isScanning, setScanning] = useState<boolean>(false);
 
   document.title = "Home | Otterscan";
 
   return (
     <div className="m-auto">
+      {isScanning && <CameraScanner turnOffScan={() => setScanning(false)} />}
       <Logo />
       <form
         className="flex flex-col"
@@ -42,14 +46,24 @@ const Home: React.FC = () => {
         autoComplete="off"
         spellCheck={false}
       >
-        <input
-          className="w-full border rounded focus:outline-none px-2 py-1 mb-10"
-          type="text"
-          size={50}
-          placeholder="Search by address / txn hash / block number / ENS name"
-          onChange={handleChange}
-          autoFocus
-        ></input>
+        <div className="flex mb-10">
+          <input
+            className="w-full border-l border-t border-b rounded-l focus:outline-none px-2 py-1"
+            type="text"
+            size={50}
+            placeholder="Search by address / txn hash / block number / ENS name"
+            onChange={handleChange}
+            autoFocus
+          />
+          <button
+            className="border rounded-r bg-gray-100 hover:bg-gray-200 focus:outline-none px-2 py-1 text-base text-gray-500 flex justify-center items-center"
+            type="button"
+            onClick={() => setScanning(true)}
+            title="Scan an ETH address using your camera"
+          >
+            <FontAwesomeIcon icon={faQrcode} />
+          </button>
+        </div>
         <button
           className="mx-auto px-3 py-1 mb-10 rounded bg-gray-100 hover:bg-gray-200 focus:outline-none"
           type="submit"
diff --git a/src/Title.tsx b/src/Title.tsx
index 6e39795..796fd83 100644
--- a/src/Title.tsx
+++ b/src/Title.tsx
@@ -1,14 +1,10 @@
 import React, { useState, useRef, useContext } from "react";
-import { isAddress } from "@ethersproject/address";
 import { Link, useHistory } from "react-router-dom";
-import { QrReader } from "@blackbox-vision/react-qr-reader";
-import { OnResultFunction } from "@blackbox-vision/react-qr-reader/dist-types/types";
-import { BarcodeFormat } from "@zxing/library";
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
 import { faQrcode } from "@fortawesome/free-solid-svg-icons/faQrcode";
-import { Dialog } from "@headlessui/react";
 import useKeyboardShortcut from "use-keyboard-shortcut";
 import PriceBox from "./PriceBox";
+import CameraScanner from "./search/CameraScanner";
 import { RuntimeContext } from "./useRuntime";
 
 const Title: React.FC = () => {
@@ -37,45 +33,10 @@ const Title: React.FC = () => {
   });
 
   const [isScanning, setScanning] = useState<boolean>(false);
-  const onScan = () => {
-    setScanning(true);
-  };
-  const evaluateScan: OnResultFunction = (result, error, codeReader) => {
-    console.log("scan");
-    if (!error && result?.getBarcodeFormat() === BarcodeFormat.QR_CODE) {
-      const text = result.getText();
-      console.log(`Scanned: ${text}`);
-      if (!isAddress(text)) {
-        console.log("Not an ETH address");
-        return;
-      }
-
-      history.push(`/search?q=${text}`);
-      setScanning(false);
-    }
-  };
 
   return (
     <>
-      <Dialog
-        className="fixed z-10 inset-0 overflow-y-auto"
-        open={isScanning}
-        onClose={() => setScanning(false)}
-      >
-        <div className="flex items-center justify-center min-h-screen">
-          <Dialog.Overlay className="fixed inset-0 bg-black opacity-30" />
-          <Dialog.Title className="absolute top-0 w-full text-center bg-white text-lg">
-            Point an ETH address QR code to camera
-          </Dialog.Title>
-          <div className="absolute inset-0 bg-transparent rounded min-w-max max-w-3xl w-full h-screen max-h-screen m-auto">
-            <QrReader
-              className="m-auto"
-              constraints={{}}
-              onResult={evaluateScan}
-            />
-          </div>
-        </div>
-      </Dialog>
+      {isScanning && <CameraScanner turnOffScan={() => setScanning(false)} />}
       <div className="px-9 py-2 flex justify-between items-baseline">
         <Link className="self-center" to="/">
           <div className="text-2xl text-link-blue font-title font-bold flex items-center space-x-2">
@@ -109,7 +70,8 @@ const Title: React.FC = () => {
             <button
               className="border bg-gray-100 hover:bg-gray-200 focus:outline-none px-2 py-1 text-sm text-gray-500"
               type="button"
-              onClick={onScan}
+              onClick={() => setScanning(true)}
+              title="Scan an ETH address using your camera"
             >
               <FontAwesomeIcon icon={faQrcode} />
             </button>
diff --git a/src/search/CameraScanner.tsx b/src/search/CameraScanner.tsx
new file mode 100644
index 0000000..b32d707
--- /dev/null
+++ b/src/search/CameraScanner.tsx
@@ -0,0 +1,54 @@
+import React from "react";
+import { useHistory } from "react-router-dom";
+import { isAddress } from "@ethersproject/address";
+import { QrReader } from "@blackbox-vision/react-qr-reader";
+import { OnResultFunction } from "@blackbox-vision/react-qr-reader/dist-types/types";
+import { BarcodeFormat } from "@zxing/library";
+import { Dialog } from "@headlessui/react";
+
+type CameraScannerProps = {
+  turnOffScan: () => void;
+};
+
+const CameraScanner: React.FC<CameraScannerProps> = ({ turnOffScan }) => {
+  const history = useHistory();
+
+  const evaluateScan: OnResultFunction = (result, error, codeReader) => {
+    console.log("scan");
+    if (!error && result?.getBarcodeFormat() === BarcodeFormat.QR_CODE) {
+      const text = result.getText();
+      console.log(`Scanned: ${text}`);
+      if (!isAddress(text)) {
+        console.warn("Not an ETH address");
+        return;
+      }
+
+      history.push(`/search?q=${text}`);
+      turnOffScan();
+    }
+  };
+
+  return (
+    <Dialog
+      className="fixed z-10 inset-0 overflow-y-auto"
+      open={true}
+      onClose={turnOffScan}
+    >
+      <div className="flex items-center justify-center min-h-screen">
+        <Dialog.Overlay className="fixed inset-0 bg-black opacity-30" />
+        <Dialog.Title className="absolute top-0 w-full text-center bg-white text-lg">
+          Point an ETH address QR code to camera
+        </Dialog.Title>
+        <div className="absolute inset-0 bg-transparent rounded min-w-max max-w-3xl w-full h-screen max-h-screen m-auto">
+          <QrReader
+            className="m-auto"
+            constraints={{}}
+            onResult={evaluateScan}
+          />
+        </div>
+      </div>
+    </Dialog>
+  );
+};
+
+export default CameraScanner;