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;;; Guix Build Coordinator
;;;
;;; Copyright © 2020 Christopher Baines <mail@cbaines.net>
;;;
;;; This file is part of the guix-build-coordinator.
;;;
;;; The Guix Build Coordinator is free software; you can redistribute
;;; it and/or modify it under the terms of the GNU General Public
;;; License as published by the Free Software Foundation; either
;;; version 3 of the License, or (at your option) any later version.
;;;
;;; The Guix Build Coordinator is distributed in the hope that it will
;;; be useful, but WITHOUT ANY WARRANTY; without even the implied
;;; warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
;;; See the GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with the guix-data-service.  If not, see
;;; <http://www.gnu.org/licenses/>.

(define-module (guix-build-coordinator guix-data-service)
  #:use-module (srfi srfi-11)
  #:use-module (ice-9 exceptions)
  #:use-module (rnrs bytevectors)
  #:use-module (json)
  #:use-module (web client)
  #:use-module (web response)
  #:use-module (guix-build-coordinator utils)
  #:use-module (guix-build-coordinator datastore)
  #:export (send-build-event-to-guix-data-service

            send-events-for-all-builds))

(define (send-build-event-to-guix-data-service target-url event)
  (send-build-events-to-guix-data-service target-url
                                          (list event)))

(define (send-build-events-to-guix-data-service target-url events)
  (define body
    (scm->json-string
     `((items . ,(list->vector events)))))

  (let*-values
      (((response body)
        (with-port-timeouts
         (lambda ()
           (http-post target-url
                      #:body body
                      ;; Guile doesn't treat JSON as text, so decode the
                      ;; body manually
                      #:decode-body? #f))))
       ((code)
        (response-code response)))
    (unless (and (>= code 200)
                 (< code 300))
      (raise-exception
       (make-exception-with-message
        (simple-format #f "code: ~A response: ~A"
                       code
                       (utf8->string body)))))))

(define (send-events-for-all-builds datastore target-url)
  (define (events-for-build build-id)
    (define build-details
      (datastore-find-build datastore build-id))

    (define derivation-name
      (assq-ref build-details 'derivation-name))

    `(((type       . build)
       (event      . scheduled)
       (build_id   . ,build-id)
       (derivation . ,derivation-name)
       ,@(let ((created-at (assq-ref build-details 'created-at)))
           (if created-at
               `((timestamp . ,(string->number
                                (strftime "%s"
                                          (assq-ref build-details 'created-at)))))
               '())))

      ,@(map
         (lambda (start-time-and-agent)
           `((type       . build)
             (event      . started)
             (build_id   . ,build-id)
             (derivation . ,derivation-name)
             (timestamp  . ,(string->number
                             (strftime "%s"
                                       (assq-ref start-time-and-agent
                                                 'start-time))))))
         (reverse
          (datastore-find-build-starts datastore build-id)))

      ,@(let ((result-details (datastore-find-build-result datastore build-id)))
          (if result-details
              `(((type       . build)
                 (event      . ,(let ((result (assq-ref result-details 'result)))
                                  (cond
                                   ((string=? result "success") 'succeeded)
                                   ((string=? result "failure") 'failed)
                                   (else
                                    (error "unknown result")))))
                 (build_id   . ,build-id)
                 (derivation . ,derivation-name)
                 ,@(let ((end-time (assq-ref build-details 'end-time)))
                     (if end-time
                         `((timestamp . ,(string->number
                                          (strftime "%s"
                                                    (assq-ref build-details
                                                              'end-time)))))
                         '()))))
              '()))))

  (datastore-for-each-build
   datastore
   (lambda (build-id)
     (simple-format #t "~A\n" build-id)
     (let ((events (events-for-build build-id)))
       (send-build-events-to-guix-data-service target-url
                                               events)))))