Starting to modularize into separate cli / server packages. (#55)

* Starting to move a lot of code into packages/server

* More of the massive refactor, builds and runs, some issues though.

* Fixing outstanding issue with double messages.

* Fixing a minor UI issue.

* Fixing the build post-merge.

* Running formatting.

* Addressing comments.

packages/server/src/utils/schemaValidator.ts

@@ -0,0 +1,59 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * Simple utility to validate objects against JSON Schemas
+ * In a real implementation, you would use a library like Ajv
+ */
+export class SchemaValidator {
+  /**
+   * Validates data against a JSON schema
+   * @param schema JSON Schema to validate against
+   * @param data Data to validate
+   * @returns True if valid, false otherwise
+   */
+  static validate(schema: Record<string, unknown>, data: unknown): boolean {
+    // This is a simplified implementation
+    // In a real application, you would use a library like Ajv for proper validation
+
+    // Check for required fields
+    if (schema.required && Array.isArray(schema.required)) {
+      const required = schema.required as string[];
+      const dataObj = data as Record<string, unknown>;
+
+      for (const field of required) {
+        if (dataObj[field] === undefined) {
+          console.error(`Missing required field: ${field}`);
+          return false;
+        }
+      }
+    }
+
+    // Check property types if properties are defined
+    if (schema.properties && typeof schema.properties === 'object') {
+      const properties = schema.properties as Record<string, { type?: string }>;
+      const dataObj = data as Record<string, unknown>;
+
+      for (const [key, prop] of Object.entries(properties)) {
+        if (dataObj[key] !== undefined && prop.type) {
+          const expectedType = prop.type;
+          const actualType = Array.isArray(dataObj[key])
+            ? 'array'
+            : typeof dataObj[key];
+
+          if (expectedType !== actualType) {
+            console.error(
+              `Type mismatch for property "${key}": expected ${expectedType}, got ${actualType}`,
+            );
+            return false;
+          }
+        }
+      }
+    }
+
+    return true;
+  }
+}