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4764ff89 SK |
1 | #! /usr/bin/env racket |
2 | ; vim: filetype=racket | |
3 | ||
4 | #lang racket | |
5 | ||
6 | (require racket/date) | |
7 | ||
8 | (require http-client) | |
9 | (require rfc3339-old) | |
10 | ||
11 | (struct msg (tm_epoch tm_rfc3339 nick text)) | |
12 | (struct feed (nick uri)) | |
13 | ||
88d50b3e SK |
14 | (define (str->lines str) |
15 | (string-split str (regexp "[\r\n]+"))) | |
16 | ||
17 | (define (str->msg nick str) | |
18 | (if (not (regexp-match? re-msg-begin str)) | |
19 | (begin | |
20 | (log-debug "Non-msg line from nick:~a, line:~a" nick str) | |
21 | #f) | |
22 | (let ([toks (string-split str (regexp "\t+"))]) | |
23 | (if (not (= 2 (length toks))) | |
24 | (begin | |
25 | (log-warning "Invalid msg line from nick:~a, msg:~a" nick str) | |
26 | #f) | |
27 | (let* | |
28 | ([tm_rfc3339 (list-ref toks 0)] | |
29 | [tok_text (list-ref toks 1)] | |
30 | [t (string->rfc3339-record tm_rfc3339)] | |
31 | ; TODO handle tz offset | |
32 | [tm_epoch (find-seconds [rfc3339-record:second t] | |
33 | [rfc3339-record:minute t] | |
34 | [rfc3339-record:hour t] | |
35 | [rfc3339-record:mday t] | |
36 | [rfc3339-record:month t] | |
37 | [rfc3339-record:year t])]) | |
38 | (msg tm_epoch tm_rfc3339 nick tok_text)))))) | |
39 | ||
40 | (define (str->msgs nick str) | |
41 | (filter-map (λ (line) (str->msg nick line)) (str->lines str))) | |
4764ff89 SK |
42 | |
43 | (define (uri-fetch uri) | |
44 | (log-info "GET ~a" uri) | |
45 | (define resp (http-get uri)) | |
46 | (define status (http-response-code resp)) | |
47 | (define body (http-response-body resp)) | |
48 | (log-debug "finished GET ~a status:~a body length:~a" | |
49 | uri status (string-length body)) | |
50 | ; TODO Handle redirects | |
51 | (if (= status 200) body (raise status))) | |
52 | ||
53 | (define re-msg-begin | |
54 | ; TODO Zulu offset. Maybe in several formats. Which ones? | |
55 | (let ([timestamp "[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}"]) | |
56 | (pregexp (string-append "^" timestamp)))) | |
57 | ||
58 | (define (msg-print odd m) | |
59 | (printf "~a \033[1;37m<~a>\033[0m \033[0;~am~a\033[0m~n" | |
60 | (date->string (seconds->date [msg-tm_epoch m]) #t) | |
61 | [msg-nick m] | |
62 | [if odd 36 33] | |
63 | [msg-text m])) | |
64 | ||
65 | (define (timeline-print timeline) | |
66 | (for ([msg timeline] | |
67 | [i (in-naturals)]) | |
68 | (msg-print (odd? i) msg))) | |
69 | ||
4764ff89 SK |
70 | (define (timeline feeds) |
71 | (let* ([timelines | |
72 | (filter-map | |
73 | (λ (feed) | |
74 | (log-info "processing feed nick:~a uri:~a" | |
75 | (feed-nick feed) | |
76 | (feed-uri feed)) | |
77 | (with-handlers | |
78 | ([exn:fail:network? | |
79 | (λ (e) | |
80 | (log-error "network error nick:~a uri:~a exn:~a" | |
81 | (feed-nick feed) | |
82 | (feed-uri feed) | |
83 | e) | |
84 | #f)] | |
85 | [integer? | |
86 | (λ (status) | |
87 | (log-error "http error nick:~a uri:~a status:~a" | |
88 | (feed-nick feed) | |
89 | (feed-uri feed) | |
90 | status) | |
91 | #f)]) | |
92 | (str->msgs [feed-nick feed] [uri-fetch (feed-uri feed)]))) | |
93 | feeds)] | |
94 | [timeline | |
95 | (append* timelines)] | |
96 | [timeline | |
97 | (sort timeline (λ (a b) [< (msg-tm_epoch a) (msg-tm_epoch b)]))]) | |
98 | timeline)) | |
99 | ||
100 | (define (we-are-twtxt) | |
101 | (let* ([uri | |
102 | "https://raw.githubusercontent.com/mdom/we-are-twtxt/master/we-are-twtxt.txt"] | |
103 | [payload | |
104 | (uri-fetch uri)] | |
105 | [lines | |
106 | (str->lines payload)] | |
107 | [feeds | |
108 | (map (λ (line) | |
109 | (define toks (string-split line)) | |
110 | (feed | |
111 | [list-ref toks 0] | |
112 | [list-ref toks 1])) | |
113 | lines)]) | |
114 | feeds)) | |
115 | ||
116 | (define (logging) | |
117 | (define logger (make-logger #f #f 'debug #f)) | |
118 | (define log-chan (make-log-receiver logger 'debug)) | |
119 | (void (thread (λ () | |
120 | [date-display-format 'iso-8601] | |
121 | [let loop () | |
122 | (define data (sync log-chan)) | |
123 | (define level (vector-ref data 0)) | |
124 | (define msg (vector-ref data 1)) | |
125 | (define ts (date->string (current-date) #t)) | |
126 | (eprintf "~a [~a] ~a~n" ts level msg) | |
127 | (loop)]))) | |
128 | (current-logger logger)) | |
129 | ||
130 | (define (main) | |
131 | (logging) | |
132 | (define feeds (we-are-twtxt)) | |
133 | (current-http-response-auto #f) | |
134 | (current-http-user-agent "tt 0.0.0") | |
135 | (date-display-format 'rfc2822) | |
136 | (timeline-print (timeline feeds))) | |
137 | ||
138 | (main) |