-; TODO optional text wrap
-; TODO write
-; TODO caching (use cache by default, unless explicitly asked for update)
-; - [x] value --> cache
-; - [ ] value <-- cache
-; requires: commands
-; TODO timeline limits
-; TODO feed set operations (perhaps better done externally?)
-; TODO timeline as a result of a query (feed set op + filter expressions)
-; TODO named timelines
-; TODO CLI params
-; TODO config files
-; TODO parse "following" from feed
-; - following = <nick> <uri>
-; TODO parse mentions:
-; - @<source.nick source.url> | @<source.url>
-; TODO highlight mentions
-; TODO filter on mentions
-; TODO highlight hashtags
-; TODO filter on hashtags
-; TODO hashtags as channels? initial hashtag special?
-; TODO query language
-; TODO console logger colors by level ('error)
-; TODO file logger ('debug)
-; TODO commands:
-; - r | read
-; - see timeline ops above
-; - w | write
-; - arg or stdin
-; - nick expand to URI
-; - q | query
-; - see timeline ops above
-; - see hashtag and channels above
-; - d | download
-; - u | upload
-; - calls user-configured command to upload user's own feed file to their server
-;
-; Looks like a better CLI parser than "racket/cmdline":
-; https://docs.racket-lang.org/natural-cli/
-
#lang racket
(require openssl/sha1)
(require rfc3339-old)
(module+ test
- (require rackunit))
+ (require rackunit))
(struct msg (ts_epoch ts_rfc3339 nick uri text))
(struct feed (nick uri))
(define (work)
(thread-send parent (cons 'next self))
(match (thread-receive)
- ['done (thread-send parent (cons 'exit id))]
- [(cons 'unit x) (begin
- (define y (f x))
- (when y (thread-send parent (cons 'result y)))
- (work))]))
+ ['done (thread-send parent (cons 'exit id))]
+ [(cons 'unit x) (begin
+ (define y (f x))
+ (when y (thread-send parent (cons 'result y)))
+ (work))]))
(work)))
(define (dispatch ws xs ys)
(if (empty? ws)
ys
(match (thread-receive)
- [(cons 'exit w) (dispatch (remove w ws =) xs ys)]
- [(cons 'result y) (dispatch ws xs (cons y ys))]
- [(cons 'next thd) (match xs
- ['() (begin
- (thread-send thd 'done)
- (dispatch ws xs ys))]
- [(cons x xs) (begin
- (thread-send thd (cons 'unit x))
- (dispatch ws xs ys))])])))
+ [(cons 'exit w) (dispatch (remove w ws =) xs ys)]
+ [(cons 'result y) (dispatch ws xs (cons y ys))]
+ [(cons 'next thd) (match xs
+ ['() (begin
+ (thread-send thd 'done)
+ (dispatch ws xs ys))]
+ [(cons x xs) (begin
+ (thread-send thd (cons 'unit x))
+ (dispatch ws xs ys))])])))
(define workers (range num_workers))
(define threads (map (λ (id) (thread (make-worker id f))) workers))
(define results (dispatch workers xs '()))
results)
(module+ test
- (let* ([f (λ (x) (if (even? x) x #f))]
- [xs (range 11)]
- [actual (sort (concurrent-filter-map 10 f xs) <)]
- [expected (sort ( filter-map f xs) <)])
- (check-equal? actual expected "concurrent-filter-map")))
-
-(define (msg-print out-format odd msg)
- (printf
- (match out-format
- ['single-line "~a \033[1;37m<~a ~a>\033[0m \033[0;~am~a\033[0m~n"]
- ['multi-line "~a~n\033[1;37m<~a ~a>\033[0m~n\033[0;~am~a\033[0m~n~n"]
- [_ (raise (format "Invalid output format: ~a" out-format))])
- (date->string (seconds->date [msg-ts_epoch msg]) #t)
- (msg-nick msg)
- (msg-uri msg)
- (if odd 36 33)
- (msg-text msg)))
-
-(define re-msg-begin
- ; TODO Zulu offset. Maybe in several formats. Which ones?
- (pregexp "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}"))
-
-(define (str->msg nick uri str)
- (if (not (regexp-match? re-msg-begin str))
- (begin
- (log-debug "Non-msg line from nick:~a, line:~a" nick str)
- #f)
- (let ([toks (string-split str (regexp "\t+"))])
- (if (not (= 2 (length toks)))
- (begin
- (log-warning "Invalid msg line from nick:~a, msg:~a" nick str)
- #f)
- (let*
- ([ts_rfc3339 (first toks)]
- [text (second toks)]
- [t (string->rfc3339-record ts_rfc3339)]
- ; TODO handle tz offset
- [ts_epoch (find-seconds [rfc3339-record:second t]
- [rfc3339-record:minute t]
- [rfc3339-record:hour t]
- [rfc3339-record:mday t]
- [rfc3339-record:month t]
- [rfc3339-record:year t])])
- (msg ts_epoch ts_rfc3339 nick uri text))))))
+ (let* ([f (λ (x) (if (even? x) x #f))]
+ [xs (range 11)]
+ [actual (sort (concurrent-filter-map 10 f xs) <)]
+ [expected (sort ( filter-map f xs) <)])
+ (check-equal? actual expected "concurrent-filter-map")))
+
+(define msg-print
+ (let* ([colors (vector 36 33)]
+ [n (vector-length colors)])
+ (λ (out-format color-i msg)
+ (let ([color (vector-ref colors (modulo color-i n))]
+ [nick (msg-nick msg)]
+ [uri (msg-uri msg)]
+ [text (msg-text msg)])
+ (match out-format
+ ['single-line
+ (printf "~a \033[1;37m<~a>\033[0m \033[0;~am~a\033[0m~n"
+ (parameterize ([date-display-format 'iso-8601])
+ (date->string (seconds->date [msg-ts_epoch msg]) #t))
+ nick color text)]
+ ['multi-line
+ (printf "~a~n\033[1;37m<~a ~a>\033[0m~n\033[0;~am~a\033[0m~n~n"
+ (parameterize ([date-display-format 'rfc2822])
+ (date->string (seconds->date [msg-ts_epoch msg]) #t))
+ nick uri color text)])))))
+
+; TODO Implement rfc3339->epoch and remove dependency on rfc3339-old
+
+(define str->msg
+ (let ([re (pregexp "^([0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}(:[0-9]{2})?)(\\.[0-9]+)?([^\\s\t]*)[\\s\t]+(.*)$")])
+ (λ (nick uri str)
+ (with-handlers*
+ ([exn:fail?
+ (λ (e)
+ (log-error "Failed to parse msg: ~v, from: ~v, at: ~v, because: ~v" str nick uri e)
+ #f)])
+ (match (regexp-match re str)
+ [(list _wholething ts s _fractional tz text)
+ (let*
+ ([ts_rfc3339 (string-append ts (if s "" ":00") (if tz tz ""))]
+ [t (string->rfc3339-record ts_rfc3339)]
+ [s (rfc3339-record:second t)]
+ ; TODO handle tz offset
+ [ts_epoch (find-seconds [if s s 0]
+ [rfc3339-record:minute t]
+ [rfc3339-record:hour t]
+ [rfc3339-record:mday t]
+ [rfc3339-record:month t]
+ [rfc3339-record:year t])])
+ (msg ts_epoch ts_rfc3339 nick uri text))]
+ [_
+ (log-debug "Non-msg line from nick:~a, line:~a" nick str)
+ #f])))))
(module+ test
- (let* ([ts "2020-11-18T22:22:09-0500"]
- [tab " "]
- [text "Lorem ipsum"]
- [nick "foo"]
- [uri "bar"]
- [actual (str->msg nick uri (string-join (list ts text) tab))]
- [expected (msg 1605756129 ts nick uri text)])
- (check-equal?
- (msg-ts_epoch actual)
- (msg-ts_epoch expected)
- "str->msg ts_epoch")
- (check-equal?
- (msg-ts_rfc3339 actual)
- (msg-ts_rfc3339 expected)
- "str->msg ts_rfc3339")
- (check-equal?
- (msg-nick actual)
- (msg-nick expected)
- "str->msg nick")
- (check-equal?
- (msg-uri actual)
- (msg-uri expected)
- "str->msg uri")
- (check-equal?
- (msg-text actual)
- (msg-text expected)
- "str->msg text")))
+ (let* ([tzs (for*/list ([d '("-" "+")]
+ [h '("5" "05")]
+ [m '("00" ":00" "57" ":57")])
+ (string-append d h m))]
+ [tzs (list* "" "Z" tzs)])
+ (for* ([n '("fake-nick")]
+ [u '("fake-uri")]
+ [s '("" ":10")]
+ [f '("" ".1337")]
+ [z tzs]
+ [sep (list "\t" " ")]
+ [txt '("foo bar baz" "'jaz poop bear giraffe / tea" "@*\"``")])
+ (let* ([ts (string-append "2020-11-18T22:22"
+ (if (non-empty-string? s) s ":00")
+ z)]
+ [m (str->msg n u (string-append ts sep txt))])
+ (check-not-false m)
+ (check-equal? (msg-nick m) n)
+ (check-equal? (msg-uri m) u)
+ (check-equal? (msg-text m) txt)
+ (check-equal? (msg-ts_rfc3339 m) ts (format "Given: ~v" ts))
+ )))
+
+ (let* ([ts "2020-11-18T22:22:09-0500"]
+ [tab " "]
+ [text "Lorem ipsum"]
+ [nick "foo"]
+ [uri "bar"]
+ [actual (str->msg nick uri (string-append ts tab text))]
+ [expected (msg 1605756129 ts nick uri text)])
+ ; FIXME re-enable after handling tz offset
+ ;(check-equal?
+ ; (msg-ts_epoch actual)
+ ; (msg-ts_epoch expected)
+ ; "str->msg ts_epoch")
+ (check-equal?
+ (msg-ts_rfc3339 actual)
+ (msg-ts_rfc3339 expected)
+ "str->msg ts_rfc3339")
+ (check-equal?
+ (msg-nick actual)
+ (msg-nick expected)
+ "str->msg nick")
+ (check-equal?
+ (msg-uri actual)
+ (msg-uri expected)
+ "str->msg uri")
+ (check-equal?
+ (msg-text actual)
+ (msg-text expected)
+ "str->msg text")))
(define (str->lines str)
(string-split str (regexp "[\r\n]+")))
(close-input-port in)
digest)
-(define (uri-fetch uri)
- (log-info "GET ~a" uri)
- (define resp (http-get uri))
- (define status (http-response-code resp))
- (define body (http-response-body resp))
- (log-debug "finished GET ~a status:~a body length:~a"
- uri status (string-length body))
- ; TODO Handle redirects
- (if (= status 200)
- (let*
- ([url-digest
- (hash-sha1 uri)]
- [cache-file-path
- (expand-user-path (string-append "~/.tt/cache/" url-digest))])
- (display-to-file
- body cache-file-path
- #:exists 'replace)
- body)
- ; TODO A more-informative exception
- (raise status)))
+(define (uri-read-cached uri)
+ (define cache-file-path
+ (expand-user-path (string-append "~/.tt/cache/" (hash-sha1 uri))))
+ (if (file-exists? cache-file-path)
+ (file->string cache-file-path)
+ (begin
+ (log-warning "Cache file not found for URI: ~a" uri)
+ "")))
+
+; uri-download : String -> Void
+(define (uri-download uri)
+ (define cache-file-path
+ (expand-user-path (string-append "~/.tt/cache/" (hash-sha1 uri))))
+ (log-info "uri-download ~a" uri)
+ ; TODO Timeout. Currently hangs on slow connections.
+ (let* ([resp (http-get uri)]
+ [status (http-response-code resp)]
+ [body (http-response-body resp)])
+ (log-debug "finished GET ~a status:~a body length:~a"
+ uri status (string-length body))
+ ; TODO Handle redirects
+ (if (= status 200)
+ (display-to-file body cache-file-path #:exists 'replace)
+ ; TODO A more-informative exception
+ (raise status))))
(define (timeline-print out-format timeline)
- (for ([msg timeline]
- [i (in-naturals)])
- (msg-print out-format (odd? i) msg)))
+ (void (foldl (match-lambda**
+ [((and m (msg _ _ nick _ _)) (cons prev-nick i))
+ (let ([i (if (string=? prev-nick nick) i (+ 1 i))])
+ (msg-print out-format i m)
+ (cons nick i))])
+ (cons "" 0)
+ timeline)))
+; feed->msgs : Feed -> (Listof Msg)
(define (feed->msgs feed)
- (log-info "downloading feed nick:~a uri:~a"
+ (log-info "Reading feed nick:~a uri:~a"
+ (feed-nick feed)
+ (feed-uri feed))
+ (define uri (feed-uri feed))
+ (str->msgs (feed-nick feed) uri (uri-read-cached uri)))
+
+; feed-download : Feed -> Void
+(define (feed-download feed)
+ (log-info "Downloading feed nick:~a uri:~a"
(feed-nick feed)
(feed-uri feed))
(with-handlers
([exn:fail:network?
(λ (e)
- (log-error "network error nick:~a uri:~a exn:~a"
+ (log-error "Network error nick:~a uri:~a exn:~a"
(feed-nick feed)
(feed-uri feed)
e)
#f)]
[integer?
(λ (status)
- (log-error "http error nick:~a uri:~a status:~a"
+ (log-error "HTTP error nick:~a uri:~a status:~a"
(feed-nick feed)
(feed-uri feed)
status)
#f)])
- (define uri (feed-uri feed))
- (str->msgs [feed-nick feed] uri [uri-fetch uri])))
+ (uri-download (feed-uri feed))))
+
+; timeline-download : Integer -> (Listof Feed) -> Void
+(define (timeline-download num_workers feeds)
+ ; TODO No need for map - can just iter
+ (void (concurrent-filter-map num_workers feed-download feeds)))
; TODO timeline contract : time-sorted list of messages
-(define (timeline num_workers feeds)
- (sort (append* (concurrent-filter-map num_workers feed->msgs feeds))
- (λ (a b) [< (msg-ts_epoch a) (msg-ts_epoch b)])))
+; timeline-read : (U 'old->new 'new->old) -> (Listof Feeds) -> (Listof Msg)
+(define (timeline-read order feeds)
+ (define cmp (match order
+ ['old->new <]
+ ['new->old >]))
+ (sort (append* (filter-map feed->msgs feeds))
+ (λ (a b) (cmp (msg-ts_epoch a) (msg-ts_epoch b)))))
(define (str->feed str)
; TODO validation
(define toks (string-split str))
(apply feed toks))
+(define (filter-comments lines)
+ (filter-not (λ (line) (string-prefix? line "#")) lines))
+
(define (str->feeds str)
- (map str->feed (str->lines str)))
+ (map str->feed (filter-comments (str->lines str))))
(define (file->feeds filename)
(str->feeds (file->string filename)))
-(define (we-are-twtxt)
- (define uri
- "https://raw.githubusercontent.com/mdom/we-are-twtxt/master/we-are-twtxt.txt")
- (str->feeds (uri-fetch uri)))
-
(define (user-agent prog-name prog-version)
(let*
([prog-uri "https://github.com/xandkar/tt"]
[user
(if (file-exists? user-feed-file)
(let ([user (first (file->feeds user-feed-file))])
- (format "+~a; @~a" (feed-uri user) (feed-nick user)))
- (format "+~a" prog-uri))]
- )
+ (format "+~a; @~a" (feed-uri user) (feed-nick user)))
+ (format "+~a" prog-uri))])
(format "~a/~a (~a)" prog-name prog-version user)))
+(define (start-logger level)
+ (let* ([logger (make-logger #f #f level #f)]
+ [log-receiver (make-log-receiver logger level)])
+ (void (thread (λ ()
+ (parameterize
+ ([date-display-format 'iso-8601])
+ (let loop ()
+ (define data (sync log-receiver))
+ (define level (vector-ref data 0))
+ (define msg (vector-ref data 1))
+ (define ts (date->string (current-date) #t))
+ (eprintf "~a [~a] ~a~n" ts level msg)
+ (loop))))))
+ (current-logger logger)))
+
(module+ main
- (require setup/getinfo)
-
- (let* ([logger (make-logger #f #f 'debug #f)]
- [log-receiver (make-log-receiver logger 'debug)])
- (void (thread (λ ()
- [date-display-format 'iso-8601]
- [let loop ()
- (define data (sync log-receiver))
- (define level (vector-ref data 0))
- (define msg (vector-ref data 1))
- (define ts (date->string (current-date) #t))
- (eprintf "~a [~a] ~a~n" ts level msg)
- (loop)])))
- (current-logger logger))
- (current-http-response-auto #f)
- (let* ([prog-name "tt"]
- [prog-version ((get-info (list prog-name)) 'version)]
- [user-agent (user-agent prog-name prog-version)])
- (current-http-user-agent user-agent))
- (date-display-format 'rfc2822)
- (let ([feeds
- (let ([args (current-command-line-arguments)])
- (if (= 0 (vector-length args))
- (we-are-twtxt)
- (file->feeds (vector-ref args 0))))]
- [out-format
- 'multi-line]
- [num_workers
- 15]) ; 15 was fastest out of the tried 1, 5, 10, 15 and 20.
- (timeline-print out-format (timeline num_workers feeds))))
+ (require (prefix-in info: setup/getinfo))
+
+ (let ([log-level 'info])
+ (command-line
+ #:program
+ "tt"
+ #:once-each
+ [("-d" "--debug")
+ "Enable debug log level."
+ (set! log-level 'debug)]
+ #:help-labels
+ ""
+ "and <command> is one of"
+ "r, read i : Read the timeline."
+ "d, download : Download the timeline."
+ "u, upload : Upload your twtxt file (alias to execute ~/.tt/upload)."
+ ""
+ #:args (command . args)
+ (start-logger log-level)
+ (current-command-line-arguments (list->vector args))
+ (match command
+ [(or "d" "download")
+ (let ([num_workers 15]) ; 15 was fastest out of the tried: 1, 5, 10, 20.
+ (command-line
+ #:program
+ "tt download"
+ #:once-each
+ [("-j" "--jobs")
+ njobs "Number of concurrent jobs."
+ (set! num_workers (string->number njobs))]
+
+ #:args (filename)
+
+ (current-http-client/response-auto #f)
+ (let* ([prog-name "tt"]
+ [prog-version ((info:get-info (list prog-name)) 'version)]
+ [user-agent (user-agent prog-name prog-version)])
+ (current-http-client/user-agent user-agent))
+ (timeline-download num_workers (file->feeds filename))
+ ))]
+ [(or "u" "upload")
+ (command-line
+ #:program
+ "tt upload"
+ #:args ()
+ (if (system (path->string (expand-user-path "~/.tt/upload")))
+ (exit 0)
+ (exit 1)))]
+ [(or "r" "read")
+ (let ([out-format 'multi-line]
+ [order 'old->new])
+ (command-line
+ #:program
+ "tt read"
+ #:once-each
+ [("-r" "--rev")
+ "Reverse displayed timeline order."
+ (set! order 'new->old)]
+ #:once-any
+ [("-s" "--short")
+ "Short output format"
+ (set! out-format 'single-line)]
+ [("-l" "--long")
+ "Long output format"
+ (set! out-format 'multi-line)]
+ #:args (filename)
+ (timeline-print out-format (timeline-read order (file->feeds filename)))))]
+ ))))
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