Add Streamlit interface for motion mosaics

apps/camera/motion/tile_send/motion_mosaic_streamlit.py

@@ -0,0 +1,79 @@
+"""Streamlit interface to display the latest motion mosaic image."""
+
+from __future__ import annotations
+
+from datetime import datetime
+from pathlib import Path
+from typing import Iterable
+
+import streamlit as st
+
+from send_motion_mosaic_no_detect import (
+    OUTPUT_MOSAIC,
+    MOTION_DIR,
+    KST,
+    create_mosaic,
+    latest_images,
+)
+
+STREAMLIT_MOSAIC = OUTPUT_MOSAIC.with_name("streamlit_motion_mosaic.jpg")
+
+
+def _display_mosaic(image_path: Path, caption: str) -> None:
+    """Render the mosaic image and associated caption in the UI."""
+
+    st.image(str(image_path), caption=caption, use_column_width=True)
+    st.caption(f"이미지 소스 디렉터리: {MOTION_DIR}")
+
+
+def _select_recent_images(limit: int = 32) -> Iterable[Path]:
+    """Return the most recent motion images up to ``limit`` entries."""
+
+    return latest_images(limit)
+
+
+def _build_caption(image_paths: Iterable[Path]) -> str:
+    """Generate a caption for the mosaic using the newest image timestamp."""
+
+    newest = max(image_paths, key=lambda p: p.stat().st_mtime)
+    timestamp = datetime.fromtimestamp(newest.stat().st_mtime, KST)
+    formatted = timestamp.strftime("%Y-%m-%d %H:%M:%S %Z")
+    return f"최신 이미지: {formatted}"
+
+
+st.set_page_config(page_title="BerePi Motion Mosaic", layout="wide")
+st.title("Motion Mosaic 뷰어")
+st.caption(
+    "최근 모션 이미지를 모아 만든 모자이크를 확인하려면 아래 버튼을 눌러 주세요."
+)
+
+if "mosaic" not in st.session_state:
+    st.session_state.mosaic = None
+
+info_placeholder = st.empty()
+
+if st.button("최근 사진 요청"):
+    try:
+        images = list(_select_recent_images())
+    except Exception as exc:  # pragma: no cover - runtime feedback
+        st.error(f"이미지 목록을 불러오는 중 오류가 발생했습니다: {exc}")
+    else:
+        if not images:
+            st.warning(
+                "모션 이미지가 없습니다. 카메라 또는 Motion 설정을 확인해 주세요."
+            )
+        else:
+            with st.spinner("모자이크를 생성하고 있습니다..."):
+                try:
+                    mosaic_path = create_mosaic(images, STREAMLIT_MOSAIC, cols=8, rows=4)
+                except Exception as exc:  # pragma: no cover - runtime feedback
+                    st.error(f"모자이크 생성에 실패했습니다: {exc}")
+                else:
+                    caption = _build_caption(images)
+                    st.session_state.mosaic = (mosaic_path, caption)
+if st.session_state.mosaic is not None:
+    mosaic_path, caption = st.session_state.mosaic
+    st.success("모자이크를 불러왔습니다.")
+    _display_mosaic(mosaic_path, caption)
+else:
+    info_placeholder.info("최근 사진을 확인하려면 '최근 사진 요청' 버튼을 눌러 주세요.")