fix(routing): unify route based architecture

ts/core/utils/template-utils.ts

@@ -0,0 +1,124 @@
+import type { IRouteContext } from '../models/route-context.js';
+
+/**
+ * Utility class for resolving template variables in strings
+ */
+export class TemplateUtils {
+  /**
+   * Resolve template variables in a string using the route context
+   * Supports variables like {domain}, {path}, {clientIp}, etc.
+   * 
+   * @param template The template string with {variables}
+   * @param context The route context with values
+   * @returns The resolved string
+   */
+  public static resolveTemplateVariables(template: string, context: IRouteContext): string {
+    if (!template) {
+      return template;
+    }
+    
+    // Replace variables with values from context
+    return template.replace(/\{([a-zA-Z0-9_\.]+)\}/g, (match, varName) => {
+      // Handle nested properties with dot notation (e.g., {headers.host})
+      if (varName.includes('.')) {
+        const parts = varName.split('.');
+        let current: any = context;
+        
+        // Traverse nested object structure
+        for (const part of parts) {
+          if (current === undefined || current === null) {
+            return match; // Return original if path doesn't exist
+          }
+          current = current[part];
+        }
+        
+        // Return the resolved value if it exists
+        if (current !== undefined && current !== null) {
+          return TemplateUtils.convertToString(current);
+        }
+        
+        return match;
+      }
+
+      // Direct property access
+      const value = context[varName as keyof IRouteContext];
+      if (value === undefined) {
+        return match; // Keep the original {variable} if not found
+      }
+
+      // Convert value to string
+      return TemplateUtils.convertToString(value);
+    });
+  }
+  
+  /**
+   * Safely convert a value to a string
+   * 
+   * @param value Any value to convert to string
+   * @returns String representation or original match for complex objects
+   */
+  private static convertToString(value: any): string {
+    if (value === null || value === undefined) {
+      return '';
+    }
+    
+    if (typeof value === 'string') {
+      return value;
+    }
+    
+    if (typeof value === 'number' || typeof value === 'boolean') {
+      return value.toString();
+    }
+    
+    if (Array.isArray(value)) {
+      return value.join(',');
+    }
+    
+    if (typeof value === 'object') {
+      try {
+        return JSON.stringify(value);
+      } catch (e) {
+        return '[Object]';
+      }
+    }
+    
+    return String(value);
+  }
+  
+  /**
+   * Resolve template variables in header values
+   * 
+   * @param headers Header object with potential template variables
+   * @param context Route context for variable resolution
+   * @returns New header object with resolved values
+   */
+  public static resolveHeaderTemplates(
+    headers: Record<string, string>,
+    context: IRouteContext
+  ): Record<string, string> {
+    const result: Record<string, string> = {};
+    
+    for (const [key, value] of Object.entries(headers)) {
+      // Skip special directive headers (starting with !)
+      if (value.startsWith('!')) {
+        result[key] = value;
+        continue;
+      }
+      
+      // Resolve template variables in the header value
+      result[key] = TemplateUtils.resolveTemplateVariables(value, context);
+    }
+    
+    return result;
+  }
+  
+  /**
+   * Check if a string contains template variables
+   * 
+   * @param str String to check for template variables
+   * @returns True if string contains template variables
+   */
+  public static containsTemplateVariables(str: string): boolean {
+    return !!str && /\{([a-zA-Z0-9_\.]+)\}/g.test(str);
+  }
+}