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#! /usr/bin/env racket
#lang racket/base
(require racket/cmdline
racket/tcp
racket/stream
racket/string
net/url
"ebus/layer7.rkt"
"util/tcp-repl.rkt"
"util/json.rkt")
(define-logger inserter)
(define connect-host? (make-parameter null))
(define connect-port? (make-parameter null))
(define insert? (make-parameter #f))
(define baseurl? (make-parameter "http://localhost:8080/api/value"))
;; Send field and value to database server
(define (insert-field sensor-name datatype value)
(if (layer7-ersatzwert? value)
(log-inserter-info "Skipping Ersatzwert for ~a/~a" sensor-name datatype)
(let ()
(define url (format "~a/~a" (baseurl?) sensor-name))
(define raw-value
(cond ((member datatype '(data1c data2b data2c)) (real->decimal-string value))
((member datatype '(bit byte data1b word bcd)) (format "~s" value))
((member datatype '(byteEnum)) value)
(else (error 'invalid-datatype))))
(define input-port (put-impure-port (string->url url) (string->bytes/utf-8 raw-value)))
(define server-response (read-line input-port))
(close-input-port input-port)
(cond ((string=? (list-ref (string-split server-response) 1) "200")
(log-inserter-info "OK: ~a : ~a" url raw-value))
(else
(error "server-error" url raw-value server-response))))))
(define (handle-packet packet)
(for ([field packet])
(when (insert?)
(with-handlers ([exn:fail? (lambda (exn)
(log-inserter-error "Failed to insert ~a: ~a" field exn))]
[exn:fail:read? (lambda (exn)
(log-inserter-error "TCP Read exception ~a" exn))]
[exn:fail:network? (lambda (exn)
(log-inserter-error "TCP Exception ~a" exn))])
(apply insert-field field)))))
(define-namespace-anchor repl-ns-anchor)
(define (main)
;; Parse commandline
(command-line
#:once-each
[("-c" "--connect") host port "Connect to server <host> <port>"
(connect-host? host)
(connect-port? (string->number port))]
["--tcp-repl" port "Open REPL on TCP <port>"
(tcp-repl-run (namespace-anchor->namespace repl-ns-anchor) (string->number port))]
["--insert" "Do Insert into Database"
(insert? #t)]
["--baseurl" url "Database server http url"
(baseurl? url)])
;; Connect, replacing input with tcp connection
(if (or (null? (connect-host?)) (null? (connect-port?)))
(log-inserter-info "Using stdin")
(let-values ([(cin cout) (tcp-connect (connect-host?) (connect-port?))])
(log-inserter-info "Connected to ~s ~s ~n" (connect-host?) (connect-port?))
(current-input-port cin)))
;; Process Ebus Packets
(for ([packet (make-stream (current-input-port))])
(when (not (or (void? packet) (eof-object? packet)))
(handle-packet packet))
(when (eof-object? packet)
(exit 1))) )
(define (make-stream port)
(stream-cons (with-handlers ([exn:fail? (lambda (exn)
(log-inserter-error "Failed to parse paket: ~a" exn)
(void))])
(layer7-read-ebus port))
(make-stream port)))
(exit (main))
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