-#lang racket
+#lang typed/racket/no-check
(require openssl/sha1)
(require racket/date)
-(require (prefix-in info: setup/getinfo))
(require
net/http-client
net/url-string
net/url-structs)
-(require rfc3339-old)
+(require (prefix-in info: "info.rkt"))
(module+ test
(require rackunit))
+(define-type Url
+ net/url-structs:url)
+
+(define-type Out-Format
+ (U 'single-line
+ 'multi-line))
+
+(define-type Timeline-Order
+ (U 'old->new
+ 'new->old))
+
(struct msg
- (
- ts_epoch ; Integer
- ts_rfc3339 ; String
- nick ; String
- uri ; net/url-structs:url
- text ; String
- ))
+ ([ts_epoch : Integer]
+ [ts_rfc3339 : String]
+ [nick : String]
+ [uri : Url]
+ [text : String])
+ #:type-name Msg)
(struct feed
- (
- nick ; String
- uri ; net/url-structs:url
- ))
+ ([nick : String]
+ [uri : Url])
+ #:type-name Feed)
(define (concurrent-filter-map num_workers f xs)
; TODO preserve order of elements OR communicate that reorder is expected
[expected (sort ( filter-map f xs) <)])
(check-equal? actual expected "concurrent-filter-map")))
+(: msg-print (-> Out-Format Integer Msg Void))
(define msg-print
(let* ([colors (vector 36 33)]
[n (vector-length colors)])
(date->string (seconds->date [msg-ts_epoch msg]) #t))
nick uri color text)])))))
-; TODO Implement rfc3339->epoch and remove dependency on rfc3339-old
-
+(: str->msg (-> String Url String (Option Msg)))
(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]+(.*)$")])
+ ; TODO Split parsing into 2 stages: 1) line->list; 2) rfc3339->epoch.
+ (let ([re (pregexp "^(([0-9]{4})-([0-9]{2})-([0-9]{2})T([0-9]{2}):([0-9]{2})(:([0-9]{2}))?)(\\.[0-9]+)?([^\\s\t]*)[\\s\t]+(.*)$")])
(λ (nick uri str)
(with-handlers*
([exn:fail?
str nick (url->string uri) e)
#f)])
(match (regexp-match re str)
- [(list _wholething ts s _fractional tz text)
+ [(list _wholething ts yyyy mm dd HH MM _:SS SS _f 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])])
+ ([ts_rfc3339 (string-append ts (if SS "" ":00") (if tz tz ""))]
+ [ts_epoch (find-seconds (if SS (string->number SS) 0)
+ (string->number MM)
+ (string->number HH)
+ (string->number dd)
+ (string->number mm)
+ (string->number yyyy))])
(msg ts_epoch ts_rfc3339 nick uri text))]
[_
(log-debug "Non-msg line from nick:~a, line:~a" nick str)
(msg-text expected)
"str->msg text")))
+(: str->lines (-> String (Listof String)))
(define (str->lines str)
(string-split str (regexp "[\r\n]+")))
(module+ test
(check-equal? (str->lines "abc\ndef\n\nghi") '("abc" "def" "ghi")))
+(: str->msgs (-> String Url String (Listof Msg)))
(define (str->msgs nick uri str)
(filter-map (λ (line) (str->msg nick uri line)) (str->lines str)))
+(: hash-sha1 (-> String String))
(define (hash-sha1 str)
(define in (open-input-string str))
(define digest (sha1 in))
(close-input-port in)
digest)
+(: url->cache-file-path (-> Url Path-String))
(define (url->cache-file-path uri)
; TODO Replace hashing with encoding
(expand-user-path (string-append "~/.tt/cache/" (hash-sha1 (url->string uri)))))
+; TODO Return Option
+(: uri-read-cached (-> Url String))
(define (uri-read-cached uri)
(define path (url->cache-file-path uri))
(if (file-exists? path)
(log-warning "Cache file not found for URI: ~a" (url->string uri))
"")))
+(: str->feed (String (Option Feed)))
(define (str->feed str)
(log-debug "Parsing feed string: ~v" str)
(match (string-split str)
(log-error "Invalid feed string: ~v" str)
#f]))
+(: filter-comments (-> (Listof String) (Listof String)))
(define (filter-comments lines)
(filter-not (λ (line) (string-prefix? line "#")) lines))
+(: str->feeds (-> String (Listof Feed)))
(define (str->feeds str)
(filter-map str->feed (filter-comments (str->lines str))))
+(: file->feeds (-> Path-String (Listof Feed)))
(define (file->feeds filename)
(str->feeds (file->string filename)))
+(: user-agent String)
(define user-agent
(let*
([prog-name "tt"]
- [prog-version ((info:get-info (list prog-name)) 'version)]
+ [prog-version (info:#%info-lookup 'version)]
[prog-uri "https://github.com/xandkar/tt"]
[user-feed-file (expand-user-path "~/twtxt-me.txt")]
[user
(format "+~a" prog-uri))])
(format "~a/~a (~a)" prog-name prog-version user)))
-; uri-download : net/url-structs:url -> Void
+(: uri-download (-> Url Void))
(define (uri-download u)
(define cache-file-path (url->cache-file-path u))
(log-debug "uri-download ~v into ~v" u cache-file-path)
[(_ _ _)
(log-error "Invalid URI: ~v" u)]))
+(: timeline-print (-> Out-Format (Listof Msg) Void))
(define (timeline-print out-format timeline)
(void (foldl (match-lambda**
[((and m (msg _ _ nick _ _)) (cons prev-nick i))
(cons "" 0)
timeline)))
-; feed->msgs : Feed -> (Listof Msg)
+(: feed->msgs (-> Feed (Listof Msg)))
(define (feed->msgs f)
(match-define (feed nick uri) f)
(log-info "Reading feed nick:~a uri:~v" nick uri)
(str->msgs nick uri (uri-read-cached uri)))
-; feed-download : Feed -> Void
+(: feed-download (-> Feed Void))
(define (feed-download f)
(match-define (feed nick uri) f)
(log-info "Downloading feed nick:~a uri:~a" nick (url->string uri))
#f)])
(uri-download uri)))
-; timeline-download : Integer -> (Listof Feed) -> Void
+(: 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
-; timeline-read : (U 'old->new 'new->old) -> (Listof Feeds) -> (Listof Msg)
+(: timeline-read (-> Timeline-Order (Listof Feed) (Listof Msg)))
(define (timeline-read order feeds)
(define cmp (match order
['old->new <]
(sort (append* (filter-map feed->msgs feeds))
(λ (a b) (cmp (msg-ts_epoch a) (msg-ts_epoch b)))))
+(: start-logger (-> Log-Level Void))
(define (start-logger level)
(let* ([logger (make-logger #f #f level #f)]
[log-receiver (make-log-receiver logger level)])
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