Megatest

;;     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.

;;======================================================================

(declare (unit rmtmod))
(declare (uses commonmod))
(declare (uses apimod))
;; (declare (uses apimod.import))
;; (declare (uses ulex))

;; (include "ulex/ulex.scm")

(module rmtmod
	*
	
(import scheme chicken data-structures extras)
(import (prefix sqlite3 sqlite3:) posix typed-records srfi-18)
(import commonmod)
(import apimod)
;; (import (prefix ulex ulex:))

(defstruct alldat
  (areapath #f)
  (ulexdat  #f)
  )


(define (rmtmod:calc-ro-mode runremote *toppath*)
  (if (and runremote
	   (remote-ro-mode-checked runremote))
      (remote-ro-mode runremote)
      (let* ((dbfile  (conc *toppath* "/megatest.db"))
	     (ro-mode (not (file-write-access? dbfile)))) ;; TODO: use dbstruct or runremote to figure this out in future
	(if runremote
	    (begin
	      (remote-ro-mode-set! runremote ro-mode)
	      (remote-ro-mode-checked-set! runremote #t)
	      ro-mode)
	    ro-mode))))


;; return the handle struct for sending queries to a specific database
;;  - initializes the connection object if this is the first access
;;    - finds the "captain" and asks who to talk to for the given dbfname
;;    - establishes the connection to the current dbowner
;;
#;(define (rmt:connect alldat dbfname dbtype)
  (let* ((ulexdat    (or (alldat-ulexdat alldat)
			 (rmt:setup-ulex alldat))))
    (ulex:connect ulexdat dbfname dbtype)))

;; setup the remote calls
#;(define (rmt:setup-ulex alldat)
  (let* ((udata (ulex:setup))) ;; establish connection to ulex
    (alldat-ulexdat-set! alldat udata)
    ;; register all needed procs
    (ulex:register-handler udata 'ping cmod:get-full-version)  ;; override ping with get-full-version
    (ulex:register-handler udata 'login cmod:get-full-version) ;; force setup of the connection
    (ulex:register-handler udata 'execute api:execute-requests)
    udata))

;; set up a connection to the current owner of the dbfile associated with rid
;; then send the query to that dbfile owner and wait for a response.
;;
#;(define (rmt:send-receive alldat cmd rid params #!key (attemptnum 1)(area-dat #f)) ;; start attemptnum at 1 so the modulo below works as expected
  (let* (;; (alldat   *alldat*)
	 (areapath (alldat-areapath alldat))
	 (dbtype   (if (or (not rid)(< rid 1)) ;; this is the criteria for "main.db"
		       "main" "runs"))
	 (dbfname  (if (equal? dbtype "main")
		       "main.db"
		       (conc rid ".db")))
	 (dbfile   (conc areapath "/.db/" dbfname))
	 (ulexconn (rmt:connect alldat dbfname dbtype))  ;; ulexconn is our new *runremote*, it is a dbowner struct < pdat lastrefresh >
	 (udata    (alldat-ulexdat alldat)))
    	(ulex:remote-request udata ulexconn 'immediate dbfile 'execute rid params)))
    ;; need to call this on the other side 
    ;; (api:execute-requests dbstruct-local (vector (symbol->string cmd) params))))
    
    #;(with-input-from-string
	(ulex:remote-request udata ulexconn 'immediate dbfile 'execute rid (with-output-to-string (lambda ()(serialize params))))
       (lambda ()(deserialize)))
)