;; Structures and interfaces for servlets.

(define-interface rt-module-language-interface 
  (export ((lambda-interface 
	    with-names-from-rt-structure)
	   :syntax)
	  reify-structure
	  load-structure
	  load-config-file
	  rt-structure-binding))

(define-interface rt-modules-interface
  (export interface-value-names 
	  reify-structure
	  load-config-file
	  rt-structure-binding
	  load-structure))

(define-structure rt-module-language rt-module-language-interface
  (open scheme
	rt-modules)
  (for-syntax (open scheme
		    rt-modules))
  (begin
    (define-syntax lambda-interface
      (lambda (expr rename compare)
	(let ((%lambda (rename 'lambda))
	      (interface-name (cadr expr))
	      (body (cddr expr)))
	  `(,%lambda ,(interface-value-names interface-name) ,@body))))

;(with-names-from-rt-structure plugin plugin-interface (main))
    (define-syntax with-names-from-rt-structure
      (lambda (expr rename compare)
	(let ((%lambda (rename 'lambda))
	      (%let (rename 'let))
	      (%rt-structure-value (rename 'rt-structure-value))
	      (%rt-structure-binding (rename 'rt-structure-binding))
	      (rt-structure (cadr expr))
	      (interface-name (caddr expr))
	      (body (cdddr expr)))
 	  (let ((ivn (interface-value-names interface-name)))
	    `(,%let ((,%rt-structure-value ,rt-structure))
	       ((,%lambda ,ivn ,@body)
		,@(map (lambda (name)
			 `(,%rt-structure-binding ,%rt-structure-value ',name))
		       ivn)))))))))

(define-structure rt-modules rt-modules-interface
  (open scheme
	meta-types ; syntax-type
	interfaces ; for-each-declaration
	define-record-types
	records
	signals
	bindings
	packages
	packages-internal
	locations
	environments
	ensures-loaded
	package-commands-internal)
  (files rt-module))

(define-interface servlet-handler-interface
  (export servlet-handler))


(define-structures
  ((servlet-handler servlet-handler-interface)
   (plugin-utilities plugin-utilities-interface))
  (open	httpd-responses
	httpd-request
	uri
	tables				;hash-tables
	define-record-types
	rt-module-language		;get structures dynamically
	srfi-13
	srfi-14				;CHAR-SET:DIGIT
	handle-fatal-error
	random				;not quite random
	locks
	thread-cells
	scsh
	scheme
	)
  (files servlet-handler))

(define-interface plugin-utilities-interface
  (export send/suspend
	  send/finish
	  ))

(define-interface plugin-interface
  (export main))