feat: Enhance PathRecorder component; implement path playback functionality and improve path loading logic

client/src/components/PathRecorder.jsx

@@ -1,4 +1,5 @@
 import { useState, useEffect } from 'react';
+import { useTurtleStore } from '../store/turtleStore';
 import './PathRecorder.css';
 
 const PathRecorder = ({ turtles, selectedTurtle, apiUrl }) => {
@@ -10,6 +11,9 @@ const PathRecorder = ({ turtles, selectedTurtle, apiUrl }) => {
   const [selectedPath, setSelectedPath] = useState(null);
   const [message, setMessage] = useState(null);
   const [loading, setLoading] = useState(false);
+  const [playingBack, setPlayingBack] = useState(false);
+
+  const sendCommand = useTurtleStore((state) => state.sendCommand);
 
   useEffect(() => {
     loadPaths();
@@ -21,7 +25,7 @@ const PathRecorder = ({ turtles, selectedTurtle, apiUrl }) => {
       const response = await fetch(`${apiUrl}/api/paths`);
       if (response.ok) {
         const data = await response.json();
-        setPaths(data);
+        setPaths(Array.isArray(data) ? data : []);
       }
     } catch (error) {
       console.error('Failed to load paths:', error);
@@ -59,31 +63,18 @@ const PathRecorder = ({ turtles, selectedTurtle, apiUrl }) => {
     }
 
     try {
-      // Create the path
-      const pathResponse = await fetch(`${apiUrl}/api/paths`, {
+      const response = await fetch(`${apiUrl}/api/paths`, {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({
-          name: currentPath.name,
           turtleId: currentPath.turtleId,
-          description: currentPath.description
+          pathName: currentPath.name,
+          pathData: currentPath.waypoints
         })
       });
 
-      if (!pathResponse.ok) {
-        throw new Error('Failed to create path');
-      }
-
-      const pathData = await pathResponse.json();
-      const pathId = pathData.pathId;
-
-      // Add all waypoints
-      for (const waypoint of currentPath.waypoints) {
-        await fetch(`${apiUrl}/api/paths/${pathId}/waypoints`, {
-          method: 'POST',
-          headers: { 'Content-Type': 'application/json' },
-          body: JSON.stringify(waypoint)
-        });
+      if (!response.ok) {
+        throw new Error('Failed to save path');
       }
 
       showMessage(`Path saved with ${currentPath.waypoints.length} waypoints!`, 'success');
@@ -132,9 +123,71 @@ const PathRecorder = ({ turtles, selectedTurtle, apiUrl }) => {
     }
   };
 
-  const playbackPath = (path) => {
-    showMessage(`Playback not yet implemented for path: ${path.name}`, 'info');
-    // TODO: Implement playback by sending commands to turtle
+  const playbackPath = async (path) => {
+    if (!selectedTurtle) {
+      showMessage('Please select a turtle to play back this path', 'error');
+      return;
+    }
+
+    // Load full path data if we don't have waypoints
+    let waypoints = path.pathData || path.waypoints;
+    if (!waypoints || waypoints.length === 0) {
+      try {
+        const response = await fetch(`${apiUrl}/api/paths/${path.pathId}`);
+        if (response.ok) {
+          const data = await response.json();
+          waypoints = data.waypoints;
+        }
+      } catch (error) {
+        showMessage('Failed to load path data', 'error');
+        return;
+      }
+    }
+
+    if (!waypoints || waypoints.length < 2) {
+      showMessage('Path has insufficient waypoints for playback', 'error');
+      return;
+    }
+
+    setPlayingBack(true);
+    showMessage(`Playing back ${waypoints.length} waypoints...`, 'info');
+    
+    const turtleId = selectedTurtle.turtleID;
+
+    // Determine movement commands between consecutive waypoints
+    for (let i = 1; i < waypoints.length; i++) {
+      const prev = waypoints[i - 1];
+      const curr = waypoints[i];
+      
+      const dx = curr.x - prev.x;
+      const dy = curr.y - prev.y;
+      const dz = curr.z - prev.z;
+
+      // Vertical movement
+      if (dy > 0) {
+        for (let j = 0; j < dy; j++) sendCommand(turtleId, 'up');
+      } else if (dy < 0) {
+        for (let j = 0; j < Math.abs(dy); j++) sendCommand(turtleId, 'down');
+      }
+
+      // Horizontal movement - send as forward movements with turns
+      if (dx > 0) {
+        for (let j = 0; j < dx; j++) sendCommand(turtleId, 'forward');
+      } else if (dx < 0) {
+        for (let j = 0; j < Math.abs(dx); j++) sendCommand(turtleId, 'forward');
+      }
+      if (dz > 0) {
+        for (let j = 0; j < dz; j++) sendCommand(turtleId, 'forward');
+      } else if (dz < 0) {
+        for (let j = 0; j < Math.abs(dz); j++) sendCommand(turtleId, 'forward');
+      }
+
+      // Small delay between waypoint groups to avoid flooding
+      await new Promise(resolve => setTimeout(resolve, 200));
+    }
+
+    setPlayingBack(false);
+    showMessage('Playback complete! Commands queued for turtle.', 'success');
   };
 
   const showMessage = (text, type) => {
@@ -276,8 +329,9 @@ const PathRecorder = ({ turtles, selectedTurtle, apiUrl }) => {
                     onClick={() => playbackPath(path)}
                     className="play-btn"
                     title="Playback path"
+                    disabled={playingBack}
                   >
-                    ▶️ Play
+                    {playingBack ? '⏳ Playing...' : '▶️ Play'}
                   </button>
                   <button 
                     onClick={() => deletePath(path.pathId)}