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4764ff89 SK |
1 | #! /usr/bin/env racket |
2 | ; vim: filetype=racket | |
3 | ||
d6a187b7 SK |
4 | ; TODO write |
5 | ; TODO caching (use cache by default, unless explicitly asked for update) | |
6 | ; TODO timeline limits | |
7 | ; TODO user-defined feed sets (a la twitter lists) | |
8 | ; TODO feed set operations | |
9 | ; TODO timeline as a result of a query (feed set op + filter expressions) | |
10 | ; TODO named timelines | |
11 | ; TODO CLI params | |
12 | ; TODO config files | |
13 | ; TODO highlight mentions | |
14 | ; TODO filter on mentions | |
15 | ; TODO highlight hashtags | |
16 | ; TODO filter on hashtags | |
17 | ; TODO query language | |
78a5f475 | 18 | ; TODO concurrency |
2793eeb3 | 19 | ; TODO log colors by level |
d6a187b7 | 20 | |
4764ff89 SK |
21 | #lang racket |
22 | ||
23 | (require racket/date) | |
24 | ||
25 | (require http-client) | |
26 | (require rfc3339-old) | |
27 | ||
28 | (struct msg (tm_epoch tm_rfc3339 nick text)) | |
29 | (struct feed (nick uri)) | |
30 | ||
e96264cc SK |
31 | (define (msg-print odd m) |
32 | (printf "~a \033[1;37m<~a>\033[0m \033[0;~am~a\033[0m~n" | |
33 | (date->string (seconds->date [msg-tm_epoch m]) #t) | |
34 | [msg-nick m] | |
35 | [if odd 36 33] | |
36 | [msg-text m])) | |
37 | ||
38 | (define re-msg-begin | |
39 | ; TODO Zulu offset. Maybe in several formats. Which ones? | |
40 | (pregexp "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}")) | |
88d50b3e SK |
41 | |
42 | (define (str->msg nick str) | |
43 | (if (not (regexp-match? re-msg-begin str)) | |
44 | (begin | |
45 | (log-debug "Non-msg line from nick:~a, line:~a" nick str) | |
46 | #f) | |
47 | (let ([toks (string-split str (regexp "\t+"))]) | |
48 | (if (not (= 2 (length toks))) | |
49 | (begin | |
50 | (log-warning "Invalid msg line from nick:~a, msg:~a" nick str) | |
51 | #f) | |
52 | (let* | |
53 | ([tm_rfc3339 (list-ref toks 0)] | |
54 | [tok_text (list-ref toks 1)] | |
55 | [t (string->rfc3339-record tm_rfc3339)] | |
56 | ; TODO handle tz offset | |
57 | [tm_epoch (find-seconds [rfc3339-record:second t] | |
58 | [rfc3339-record:minute t] | |
59 | [rfc3339-record:hour t] | |
60 | [rfc3339-record:mday t] | |
61 | [rfc3339-record:month t] | |
62 | [rfc3339-record:year t])]) | |
63 | (msg tm_epoch tm_rfc3339 nick tok_text)))))) | |
64 | ||
e96264cc SK |
65 | (define (str->lines str) |
66 | (string-split str (regexp "[\r\n]+"))) | |
67 | ||
88d50b3e SK |
68 | (define (str->msgs nick str) |
69 | (filter-map (λ (line) (str->msg nick line)) (str->lines str))) | |
4764ff89 SK |
70 | |
71 | (define (uri-fetch uri) | |
72 | (log-info "GET ~a" uri) | |
73 | (define resp (http-get uri)) | |
74 | (define status (http-response-code resp)) | |
75 | (define body (http-response-body resp)) | |
76 | (log-debug "finished GET ~a status:~a body length:~a" | |
77 | uri status (string-length body)) | |
78 | ; TODO Handle redirects | |
79 | (if (= status 200) body (raise status))) | |
80 | ||
4764ff89 SK |
81 | (define (timeline-print timeline) |
82 | (for ([msg timeline] | |
83 | [i (in-naturals)]) | |
84 | (msg-print (odd? i) msg))) | |
85 | ||
9a6a9f9a SK |
86 | (define (feed->msgs feed) |
87 | (log-info "downloading feed nick:~a uri:~a" | |
88 | (feed-nick feed) | |
89 | (feed-uri feed)) | |
90 | (with-handlers | |
91 | ([exn:fail:network? | |
92 | (λ (e) | |
93 | (log-error "network error nick:~a uri:~a exn:~a" | |
94 | (feed-nick feed) | |
95 | (feed-uri feed) | |
96 | e) | |
97 | #f)] | |
98 | [integer? | |
99 | (λ (status) | |
100 | (log-error "http error nick:~a uri:~a status:~a" | |
101 | (feed-nick feed) | |
102 | (feed-uri feed) | |
103 | status) | |
104 | #f)]) | |
105 | (str->msgs [feed-nick feed] [uri-fetch (feed-uri feed)]))) | |
106 | ||
107 | ; TODO timeline contract : time-sorted list of messages | |
4764ff89 | 108 | (define (timeline feeds) |
9a6a9f9a SK |
109 | (sort (append* (filter-map feed->msgs feeds)) |
110 | (λ (a b) [< (msg-tm_epoch a) (msg-tm_epoch b)]))) | |
4764ff89 SK |
111 | |
112 | (define (we-are-twtxt) | |
113 | (let* ([uri | |
114 | "https://raw.githubusercontent.com/mdom/we-are-twtxt/master/we-are-twtxt.txt"] | |
115 | [payload | |
116 | (uri-fetch uri)] | |
117 | [lines | |
118 | (str->lines payload)] | |
119 | [feeds | |
120 | (map (λ (line) | |
121 | (define toks (string-split line)) | |
122 | (feed | |
123 | [list-ref toks 0] | |
124 | [list-ref toks 1])) | |
125 | lines)]) | |
126 | feeds)) | |
127 | ||
e96264cc | 128 | (define (setup-logging) |
4764ff89 SK |
129 | (define logger (make-logger #f #f 'debug #f)) |
130 | (define log-chan (make-log-receiver logger 'debug)) | |
131 | (void (thread (λ () | |
132 | [date-display-format 'iso-8601] | |
133 | [let loop () | |
134 | (define data (sync log-chan)) | |
135 | (define level (vector-ref data 0)) | |
136 | (define msg (vector-ref data 1)) | |
137 | (define ts (date->string (current-date) #t)) | |
138 | (eprintf "~a [~a] ~a~n" ts level msg) | |
139 | (loop)]))) | |
140 | (current-logger logger)) | |
141 | ||
142 | (define (main) | |
e96264cc | 143 | (setup-logging) |
4764ff89 | 144 | (current-http-response-auto #f) |
8e475eb8 | 145 | (current-http-user-agent "xandkar/tt 0.0.0") |
4764ff89 | 146 | (date-display-format 'rfc2822) |
e96264cc SK |
147 | |
148 | (define feeds (we-are-twtxt)) | |
4764ff89 SK |
149 | (timeline-print (timeline feeds))) |
150 | ||
151 | (main) |