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(module efax
(efax-password efax-username efax-account efax-send efax-status)
(import chicken scheme)
(use srfi-1 srfi-13 data-structures
http-client base64 sxml-serializer ssax sxpath)
(define efax-service-uri "https://secure.efaxdeveloper.com/EFax_WebFax.serv")
(define efax-account (make-parameter #f))
(define efax-username (make-parameter #f))
(define efax-password (make-parameter #f))
(define-syntax let-auth
(syntax-rules ()
((_ ?procname ?account ?username ?password ?body ...)
(let ((?username (or (and ?password ?username) (efax-username)))
(?password (or (and ?username ?password) (efax-password)))
;; Account can be provided separately via the global param,
;; but username and password must be provided at the same place.
(?account (or ?account (efax-account))))
(unless (and ?username ?password ?account)
(error '?procname
(conc "You must provide an eFax account, username & password, "
"either via the efax-account, efax-username and "
"efax-password global parameters or via the account, "
"username and password keys for this procedure")))
?body ...))))
(define (read-document-or-raise-error port location)
(let* ((result (ssax:xml->sxml port '()))
(tid ((if-car-sxpath
'(// TransmissionControl TransmissionID *text*)) result))
(did ((if-car-sxpath
'(// TransmissionControl DOCID *text*)) result))
(code ((if-car-sxpath '(// Response StatusCode *text*)) result)))
(if (or (not code) (string=? code "1"))
result
(signal (make-composite-condition
(make-property-condition
'exn
'location location
'message
((if-car-sxpath '(// Response ErrorMessage *text*))
result))
(make-property-condition
'efax
'error-code code
'error-description
((if-car-sxpath '(// Response StatusDescription *text*)) result)
'error-level
(string->symbol
(string-downcase
((if-car-sxpath '(// Response ErrorLevel *text*)) result)))
'document-id did 'transmission-id tid))))))
;; TODO: This should probably allow files to be ports so that we can
;; stream large amounts of data. That would mean we can't use SXML anymore,
;; though! Instead, we would need some kind of chunked layer-upon-layer
;; procedure that encodes base64 inside XML inside uri-encoded POST data.
;; It's probably not worth it since it isn't likely people are going to
;; send gigabytes worth of data; it has to come out a fax machine, which
;; would translate to many pages of dead tree!
(define (efax-send recipients files
#!key account username password transmission-id
unique-id customer-id high-resolution high-priority)
(let-auth efax-send account username password
(call-with-input-request
efax-service-uri
`((id . ,account)
(respond . "XML")
(xml . ,(serialize-sxml
`(*TOP*
(*PI* xml "version=\"1.0\"")
(OutboundRequest
(AccessControl (UserName ,username) (Password ,password))
(Transmission
(TransmissionControl
;; TODO: SelfBusy, FaxHeader
,@(if transmission-id `((TransmissionID ,transmission-id)) '())
(NoDuplicates ,(if unique-id "ENABLE" "DISABLE"))
,@(if customer-id `((CustomerID ,customer-id)) '())
(Resolution ,(if high-resolution "FINE" "STANDARD"))
(Priority ,(if high-priority "HIGH" "NORMAL")))
(DispositionControl
;; TODO: DispositionURL, DispositionLevel, DispositionMethod, DispositionEmail(s)?
(DispositionLevel "NONE"))
(Recipients
. ,(if (string? recipients)
`((Recipient (RecipientFax ,recipients)))
(map
(lambda (recipient)
`(if (string? recipient)
`(Recipient (RecipientFax ,recipient))
`(Recipient
,@(map
(lambda (entry)
(let ((key (car entry))
(value (cdr entry)))
(case key
((name) `(RecipientName ,value))
((company) `(RecipientName ,value))
((fax) `(RecipientFax ,value))
(else (error "Unknown recipient key" key)))))
recipient))))
recipients)))
(Files . ,(map (lambda (file)
`(File (FileContents ,(base64-encode (cdr file)))
(FileType ,(->string (car file)))))
files))))))))
(lambda (port)
(let* ((doc (read-document-or-raise-error port 'efax-send))
(tid ((if-car-sxpath
'(// TransmissionControl TransmissionID *text*)) doc))
(did ((if-car-sxpath
'(// TransmissionControl DOCID *text*)) doc)))
`((doc-id . ,did) (transmission-id . ,tid)))))))
(define (efax-status #!key account username password doc-id transmission-id)
(let-auth efax-status account username password
(call-with-input-request
efax-service-uri
`((id . ,account)
(respond . "XML")
(xml . ,(serialize-sxml
`(*TOP*
(*PI* xml "version=\"1.0\"")
(OutboundStatus
(AccessControl (UserName ,username) (Password ,password))
(Transmission
(TransmissionControl
,@(if transmission-id `((TransmissionID ,transmission-id)) '())
,@(if doc-id `((DOCID ,doc-id)) '()))))))))
(lambda (port)
(let* ((doc (read-document-or-raise-error port 'efax-status))
(tid ((if-car-sxpath
'(// TransmissionControl TransmissionID *text*)) doc)))
`((transmission-id . ,tid)
(recipients . ,(map (lambda (r)
(cons
((if-car-sxpath '(Fax *text*)) r)
(fold-right
(lambda (name expr result)
(let ((value ((if-car-sxpath expr) r)))
(if value
(cons (cons name value) result)
result)))
;; TODO: Convert a few of these to
;; Scheme-native types?
;; pages-*, duration, retries can be numbers
'()
'(name company fax status-message
status-classification status-outcome
last-attempt-date last-attempt-time
next-attempt-date next-attempt-time
pages-scheduled pages-sent
baud-rate retries remote-csid)
'((Name *text*) (Company *text*) (Fax *text*)
(Status Message *text*)
(Status Outcome *text*)
(Status Classification *text*)
(LastAttempt LastDate *text*)
(LastAttempt LastTime *text*)
(NextAttempt NextDate *text*)
(NextAttempt NextTime *text*)
(Pages Scheduled *text*)
(Pages Sent *text*)
(BaudRate *text*)
(Retries *text*)
(RemoteCSID *text*)))))
((sxpath '(// Recipient)) doc)))))))))
)
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