Create app.py

app.py

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+import streamlit as st  # 🌐 Streamlit magic
+import streamlit.components.v1 as components  # 🖼️ Embed custom HTML/JS
+import os  # 📂 File operations
+import json  # 🔄 JSON encoding/decoding
+import pandas as pd  # 📊 DataFrame handling
+import uuid  # 🆔 Unique IDs
+import math  # ➗ Math utils
+import time  # ⏳ Time utilities
+
+from gamestate import GameState  # 💼 Shared game-state singleton
+
+# 🚀 Page setup
+st.set_page_config(page_title="Infinite World Builder", layout="wide")
+
+# 📏 Constants for world dimensions & CSV schema
+SAVE_DIR = "saved_worlds"
+PLOT_WIDTH = 50.0  # ↔️ Plot width in world units
+PLOT_DEPTH = 50.0  # ↕️ Plot depth in world units
+CSV_COLUMNS = [
+    'obj_id', 'type',
+    'pos_x', 'pos_y', 'pos_z',
+    'rot_x', 'rot_y', 'rot_z', 'rot_order'
+]
+
+# 🗂️ Ensure directory for plots exists
+os.makedirs(SAVE_DIR, exist_ok=True)
+
+@st.cache_data(ttl=3600)  # 🕒 Cache for 1h
+def load_plot_metadata():
+    # 🔍 Scan SAVE_DIR for plot CSVs
+    try:
+        plot_files = [f for f in os.listdir(SAVE_DIR)
+                      if f.endswith(".csv") and f.startswith("plot_X")]
+    except FileNotFoundError:
+        st.error(f"Folder '{SAVE_DIR}' missing! 🚨")
+        return []
+    except Exception as e:
+        st.error(f"Error reading '{SAVE_DIR}': {e}")
+        return []
+
+    parsed = []
+    for fn in plot_files:
+        try:
+            parts = fn[:-4].split('_')  # strip .csv
+            gx = int(parts[1][1:])  # X index
+            gz = int(parts[2][1:])  # Z index
+            name = " ".join(parts[3:]) if len(parts)>3 else f"Plot({gx},{gz})"
+            parsed.append({
+                'id': fn[:-4],
+                'filename': fn,
+                'grid_x': gx,
+                'grid_z': gz,
+                'name': name,
+                'x_offset': gx * PLOT_WIDTH,
+                'z_offset': gz * PLOT_DEPTH
+            })
+        except Exception:
+            st.warning(f"Skip invalid file: {fn}")
+    parsed.sort(key=lambda p: (p['grid_x'], p['grid_z']))
+    return parsed
+
+
+def load_plot_objects(filename, x_offset, z_offset):
+    # 📥 Load objects from a plot CSV and shift by offsets
+    path = os.path.join(SAVE_DIR, filename)
+    try:
+        df = pd.read_csv(path)
+        # 🛡️ Ensure essentials exist
+        if not all(c in df.columns for c in ['type','pos_x','pos_y','pos_z']):
+            st.warning(f"Missing cols in {filename} 🧐")
+            return []
+        # 🆔 Guarantee obj_id
+        df['obj_id'] = df.get('obj_id', pd.Series([str(uuid.uuid4()) for _ in df.index]))
+        # 🔄 Fill missing rotation
+        for col, default in [('rot_x',0.0),('rot_y',0.0),('rot_z',0.0),('rot_order','XYZ')]:
+            if col not in df.columns:
+                df[col] = default
+
+        objs = []
+        for _, row in df.iterrows():
+            o = row.to_dict()
+            o['pos_x'] += x_offset
+            o['pos_z'] += z_offset
+            objs.append(o)
+        return objs
+    except FileNotFoundError:
+        st.error(f"CSV not found: {filename}")
+        return []
+    except pd.errors.EmptyDataError:
+        return []
+    except Exception as e:
+        st.error(f"Load error {filename}: {e}")
+        return []
+
+
+def save_plot_data(filename, objects_list, px, pz):
+    # 💾 Save list of new objects relative to plot origin
+    path = os.path.join(SAVE_DIR, filename)
+    if not isinstance(objects_list, list):
+        st.error("👎 Invalid data format for save")
+        return False
+
+    rel = []
+    for o in objects_list:
+        pos = o.get('position', {})
+        rot = o.get('rotation', {})
+        typ = o.get('type','Unknown')
+        oid = o.get('obj_id', str(uuid.uuid4()))
+        # 🛑 Skip bad objects
+        if not all(k in pos for k in ['x','y','z']) or typ=='Unknown':
+            continue
+        rel.append({
+            'obj_id': oid, 'type': typ,
+            'pos_x': pos['x']-px, 'pos_y': pos['y'], 'pos_z': pos['z']-pz,
+            'rot_x': rot.get('_x',0.0), 'rot_y': rot.get('_y',0.0),
+            'rot_z': rot.get('_z',0.0), 'rot_order': rot.get('_order','XYZ')
+        })
+    try:
+        pd.DataFrame(rel, columns=CSV_COLUMNS).to_csv(path, index=False)
+        st.success(f"🎉 Saved {len(rel)} to {filename}")
+        return True
+    except Exception as e:
+        st.error(f"Save failed: {e}")
+        return False
+
+# 🔒 Singleton for global world state
+@st.cache_resource
+def get_game_state():
+    return GameState(save_dir=SAVE_DIR, csv_filename="world_state.csv")
+
+game_state = get_game_state()
+
+# 🧠 Session state defaults
+st.session_state.setdefault('selected_object','None')
+st.session_state.setdefault('new_plot_name','')
+st.session_state.setdefault('js_save_data_result',None)
+
+# 🔄 Load everything
+plots_metadata = load_plot_metadata()
+all_initial_objects = []
+for p in plots_metadata:
+    all_initial_objects += load_plot_objects(p['filename'], p['x_offset'], p['z_offset'])
+
+# 🖥️ Sidebar UI
+with st.sidebar:
+    st.title("🏗️ World Controls")
+    st.header("📍 Navigate Plots")
+    cols = st.columns(2)
+    i = 0
+    for p in sorted(plots_metadata, key=lambda x:(x['grid_x'],x['grid_z'])):
+        label = f"➡️ {p['name']} ({p['grid_x']},{p['grid_z']})"
+        if cols[i].button(label, key=f"nav_{p['id']}"):
+            try:
+                from streamlit_js_eval import streamlit_js_eval
+                js = f"teleportPlayer({p['x_offset']+PLOT_WIDTH/2},{p['z_offset']+PLOT_DEPTH/2});"
+                streamlit_js_eval(js_code=js, key=f"tp_{p['id']}")
+            except Exception as e:
+                st.error(f"TP fail: {e}")
+        i = (i+1)%2
+
+    st.markdown("---")
+    st.header("🌲 Place Objects")
+    opts = ["None","Simple House","Tree","Rock","Fence Post"]
+    idx = opts.index(st.session_state.selected_object) if st.session_state.selected_object in opts else 0
+    sel = st.selectbox("Select:", opts, index=idx, key="selected_object_widget")
+    if sel != st.session_state.selected_object:
+        st.session_state.selected_object = sel
+
+    st.markdown("---")
+    st.header("💾 Save Work")
+    if st.button("💾 Save Current Work", key="save_button"):
+        from streamlit_js_eval import streamlit_js_eval
+        streamlit_js_eval(js_code="getSaveDataAndPosition();", key="js_save_processor")
+        st.rerun()
+
+# 📨 Handle incoming save data
+raw = st.session_state.get("js_save_processor")
+if raw:
+    st.info("📬 Got save data!")
+    ok=False
+    try:
+        pay = json.loads(raw) if isinstance(raw,str) else raw
+        pos, objs = pay.get('playerPosition'), pay.get('objectsToSave')
+        if isinstance(objs,list) and pos:
+            gx, gz = math.floor(pos['x']/PLOT_WIDTH), math.floor(pos['z']/PLOT_DEPTH)
+            fn = f"plot_X{gx}_Z{gz}.csv"
+            if save_plot_data(fn, objs, gx*PLOT_WIDTH, gz*PLOT_DEPTH):
+                load_plot_metadata.clear()
+                try:
+                    from streamlit_js_eval import streamlit_js_eval
+                    streamlit_js_eval(js_code="resetNewlyPlacedObjects();", key="reset_js")
+                except:
+                    pass
+                game_state.update_state(objs)
+                ok=True
+        if not ok:
+            st.error("❌ Save error")
+    except Exception as e:
+        st.error(f"Err: {e}")
+    st.session_state.js_save_processor=None
+    if ok: st.rerun()
+
+# 🏠 Main view
+st.header("🌍 Infinite Shared 3D World")
+st.caption("➡️ Explore, click to build, 💾 to save!")
+
+# 🔌 Inject state into JS
+state = {
+    "ALL_INITIAL_OBJECTS": all_initial_objects,
+    "PLOTS_METADATA": plots_metadata,
+    "SELECTED_OBJECT_TYPE": st.session_state.selected_object,
+    "PLOT_WIDTH": PLOT_WIDTH,
+    "PLOT_DEPTH": PLOT_DEPTH,
+    "GAME_STATE": game_state.get_state()
+}
+
+try:
+    with open('index.html','r',encoding='utf-8') as f:
+        html = f.read()
+    script = f"""
+<script>
+    window.ALL_INITIAL_OBJECTS = {json.dumps(state['ALL_INITIAL_OBJECTS'])};
+    window.PLOTS_METADATA   = {json.dumps(state['PLOTS_METADATA'])};
+    window.SELECTED_OBJECT_TYPE = {json.dumps(state['SELECTED_OBJECT_TYPE'])};
+    window.PLOT_WIDTH = {json.dumps(state['PLOT_WIDTH'])};
+    window.PLOT_DEPTH = {json.dumps(state['PLOT_DEPTH'])};
+    window.GAME_STATE = {json.dumps(state['GAME_STATE'])};
+    console.log('👍 State injected!', {{
+        objs: window.ALL_INITIAL_OBJECTS.length,
+        plots: window.PLOTS_METADATA.length,
+        gs: window.GAME_STATE.length
+    }});
+</script>
+"""
+    html = html.replace('</head>', script + '\n</head>', 1)
+    components.html(html, height=750, scrolling=False)
+except FileNotFoundError:
+    st.error("❌ index.html missing!")
+except Exception as e:
+    st.error(f"😱 HTML inject failed: {e}")