[NDD-87] Interview 페이지 camera 컴포넌트 기능 부여 (7h/8h)

FE/src/components/interviewPage/InterviewCamera.tsx

@@ -1,19 +1,143 @@
+import React, { useState, useRef, useEffect, useLayoutEffect } from 'react';
 import { css } from '@emotion/react';
 
 const InterviewCamera: React.FC = () => {
+  const [stream, setStream] = useState<MediaStream | null>(null);
+  const [recording, setRecording] = useState(false);
+  const [recordedBlobs, setRecordedBlobs] = useState<Blob[]>([]);
+  const [selectedMimeType, setSelectedMimeType] = useState('');
+
+  const mirrorVideoRef = useRef<HTMLVideoElement>(null);
+  const mediaRecorderRef = useRef<MediaRecorder | null>(null);
+
+  useLayoutEffect(() => {
+    const mimeTypes = getSupportedMimeTypes();
+    if (mimeTypes.length > 0) {
+      setSelectedMimeType(mimeTypes[0]);
+    }
+  }, []);
+
+  useEffect(() => {
+    if (!stream) {
+      void getMedia();
+    }
+
+    return () => {
+      if (stream) {
+        stream.getTracks().forEach((track) => track.stop());
+      }
+    };
+  }, [stream]);
+
+  const getMedia = async () => {
+    try {
+      const constraints = {
+        audio: {
+          echoCancellation: { exact: true },
+        },
+        video: {
+          width: 1280,
+          height: 720,
+        },
+      };
+      const mediaStream =
+        await navigator.mediaDevices.getUserMedia(constraints);
+      setStream(mediaStream);
+      if (mirrorVideoRef.current) {
+        mirrorVideoRef.current.srcObject = mediaStream;
+      }
+    } catch (e) {
+      console.log(`현재 마이크와 카메라가 연결되지 않았습니다`);
+    }
+  };
+
+  const handleStartRecording = () => {
+    setRecordedBlobs([]);
+    try {
+      mediaRecorderRef.current = new MediaRecorder(stream as MediaStream, {
+        mimeType: selectedMimeType,
+      });
+      mediaRecorderRef.current.ondataavailable = (event) => {
+        if (event.data && event.data.size > 0) {
+          setRecordedBlobs((prev) => [...prev, event.data]);
+        }
+      };
+      mediaRecorderRef.current.start();
+      setRecording(true);
+    } catch (e) {
+      console.log(`MediaRecorder error`);
+    }
+  };
+
+  const handleStopRecording = () => {
+    if (mediaRecorderRef.current) {
+      mediaRecorderRef.current.stop();
+    }
+    setRecording(false);
+  };
+
+  const handleDownload = () => {
+    const blob = new Blob(recordedBlobs, { type: selectedMimeType });
+    const url = window.URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.style.display = 'none';
+    a.href = url;
+    a.download = 'recorded.webm';
+    document.body.appendChild(a);
+    a.click();
+    setTimeout(() => {
+      document.body.removeChild(a);
+      window.URL.revokeObjectURL(url);
+    }, 100);
+  };
+
+  const getSupportedMimeTypes = () => {
+    const types = [
+      'video/webm; codecs=vp8',
+      'video/webm; codecs=vp9',
+      'video/webm; codecs=h264',
+      'video/mp4; codecs=h264',
+    ];
+    return types.filter((type) => MediaRecorder.isTypeSupported(type));
+  };
+
   return (
     <div
       css={css`
         display: flex;
-        justify-content: center;
+        flex-direction: column;
         align-items: center;
-        width: 100%;
-        height: 75%;
-        border: 0.0625rem solid red;
+        background-color: black;
       `}
     >
-      면접페이지의 카메라 입니다.
+      <video
+        ref={mirrorVideoRef}
+        playsInline
+        autoPlay
+        muted
+        css={css`
+          width: 100%;
+          height: 80%;
+          transform: scaleX(-1);
+        `}
+      />
+
+      <div>
+        <button onClick={handleStartRecording} disabled={recording}>
+          시작
+        </button>
+        <button onClick={handleStopRecording} disabled={!recording}>
+          종료
+        </button>
+        <button
+          onClick={handleDownload}
+          disabled={recording || recordedBlobs.length === 0}
+        >
+          저장
+        </button>
+      </div>
     </div>
   );
 };
+
 export default InterviewCamera;