feat: add color to sockets

Closes #34

app/src/lib/graph-interface/graph/Graph.svelte

@@ -95,6 +95,13 @@
     graphState.activeSocket = null;
     graphState.addMenuPosition = null;
   }
+
+  function getSocketType(node: NodeInstance, index: number | string): string {
+    if (typeof index === 'string') {
+      return node.state.type?.inputs?.[index].type || 'unknown';
+    }
+    return node.state.type?.outputs?.[index] || 'unknown';
+  }
 </script>
 
 <svelte:window
@@ -175,6 +182,8 @@
       {#if graphState.activeSocket}
         <EdgeEl
           z={graphState.cameraPosition[2]}
+          inputType={getSocketType(graphState.activeSocket.node, graphState.activeSocket.index)}
+          outputType={getSocketType(graphState.activeSocket.node, graphState.activeSocket.index)}
           x1={graphState.activeSocket.position[0]}
           y1={graphState.activeSocket.position[1]}
           x2={graphState.edgeEndPosition?.[0] ?? graphState.mousePosition[0]}
@@ -187,6 +196,8 @@
         <EdgeEl
           id={graph.getEdgeId(edge)}
           z={graphState.cameraPosition[2]}
+          inputType={getSocketType(edge[0], edge[1])}
+          outputType={getSocketType(edge[2], edge[3])}
           {x1}
           {y1}
           {x2}

app/src/lib/graph-interface/graph/colors.ts

@@ -0,0 +1,45 @@
+type Color = { hue: number; saturation: number; lightness: number };
+
+export class ColorGenerator {
+  private colors: Map<string, Color> = new Map();
+  private lightnessLevels = [10, 60];
+
+  constructor(predefined: Record<string, Color>) {
+    for (const [id, colorStr] of Object.entries(predefined)) {
+      this.colors.set(id, colorStr);
+    }
+  }
+
+  public getColor(id: string): string {
+    if (this.colors.has(id)) {
+      return this.colorToHsl(this.colors.get(id)!);
+    }
+
+    const newColor = this.generateNewColor();
+    this.colors.set(id, newColor);
+    console.log(id, newColor);
+    return this.colorToHsl(newColor);
+  }
+
+  private generateNewColor(): Color {
+    const existingHues = Array.from(this.colors.values()).map(c => c.hue).sort();
+    let hue = existingHues[0];
+    let attempts = 0;
+
+    while (
+      existingHues.some(h => Math.abs(h - hue) < 30 || Math.abs(h - hue) > 330)
+      && attempts < 360
+    ) {
+      hue = (hue + 30) % 360;
+      attempts++;
+    }
+
+    const lightness = 60;
+
+    return { hue, lightness, saturation: 100 };
+  }
+
+  private colorToHsl(c: Color): string {
+    return `hsl(${c.hue}, ${c.saturation}%, ${c.lightness}%)`;
+  }
+}