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4764ff89 SK |
1 | #! /usr/bin/env racket |
2 | ; vim: filetype=racket | |
3 | ||
e5c3ae92 | 4 | ; TODO optional text wrap |
d6a187b7 SK |
5 | ; TODO write |
6 | ; TODO caching (use cache by default, unless explicitly asked for update) | |
1d753430 SK |
7 | ; - [x] value --> cache |
8 | ; - [ ] value <-- cache | |
9 | ; requires: commands | |
d6a187b7 | 10 | ; TODO timeline limits |
be96956c | 11 | ; TODO feed set operations (perhaps better done externally?) |
d6a187b7 SK |
12 | ; TODO timeline as a result of a query (feed set op + filter expressions) |
13 | ; TODO named timelines | |
14 | ; TODO CLI params | |
15 | ; TODO config files | |
895a32cf SK |
16 | ; TODO parse "following" from feed |
17 | ; - following = <nick> <uri> | |
93ebe03e SK |
18 | ; TODO parse mentions: |
19 | ; - @<source.nick source.url> | @<source.url> | |
d6a187b7 SK |
20 | ; TODO highlight mentions |
21 | ; TODO filter on mentions | |
22 | ; TODO highlight hashtags | |
23 | ; TODO filter on hashtags | |
e0e0fb20 | 24 | ; TODO hashtags as channels? initial hashtag special? |
d6a187b7 | 25 | ; TODO query language |
e0e0fb20 SK |
26 | ; TODO console logger colors by level ('error) |
27 | ; TODO file logger ('debug) | |
dbccadf9 SK |
28 | ; TODO commands: |
29 | ; - r | read | |
30 | ; - see timeline ops above | |
31 | ; - w | write | |
93ebe03e | 32 | ; - arg or stdin |
dbccadf9 SK |
33 | ; - nick expand to URI |
34 | ; - q | query | |
35 | ; - see timeline ops above | |
36 | ; - see hashtag and channels above | |
93ebe03e SK |
37 | ; - d | download |
38 | ; - u | upload | |
39 | ; - calls user-configured command to upload user's own feed file to their server | |
d6a187b7 | 40 | |
4764ff89 SK |
41 | #lang racket |
42 | ||
1d753430 | 43 | (require openssl/sha1) |
4764ff89 SK |
44 | (require racket/date) |
45 | ||
46 | (require http-client) | |
47 | (require rfc3339-old) | |
48 | ||
87d0eb92 | 49 | (struct msg (ts_epoch ts_rfc3339 nick uri text)) |
4764ff89 SK |
50 | (struct feed (nick uri)) |
51 | ||
895a32cf | 52 | (define (concurrent-filter-map num_workers f xs) |
a239a233 | 53 | ; TODO switch from mailboxes to channels |
895a32cf SK |
54 | (define (make-worker id f) |
55 | (define parent (current-thread)) | |
56 | (λ () | |
57 | (define self (current-thread)) | |
58 | (define (work) | |
59 | (thread-send parent (cons 'next self)) | |
60 | (match (thread-receive) | |
61 | ['done (thread-send parent (cons 'exit id))] | |
62 | [(cons 'unit x) (begin | |
63 | (define y (f x)) | |
64 | (when y (thread-send parent (cons 'result y))) | |
65 | (work))])) | |
66 | (work))) | |
67 | (define (dispatch ws xs ys) | |
68 | (if (empty? ws) | |
69 | ys | |
70 | (match (thread-receive) | |
71 | [(cons 'exit w) (dispatch (remove w ws =) xs ys)] | |
72 | [(cons 'result y) (dispatch ws xs (cons y ys))] | |
73 | [(cons 'next thd) (match xs | |
74 | ['() (begin | |
75 | (thread-send thd 'done) | |
76 | (dispatch ws xs ys))] | |
77 | [(cons x xs) (begin | |
78 | (thread-send thd (cons 'unit x)) | |
79 | (dispatch ws xs ys))])]))) | |
9926c9a9 SK |
80 | (define workers (range num_workers)) |
81 | (define threads (map (λ (id) (thread (make-worker id f))) workers)) | |
82 | (define results (dispatch workers xs '())) | |
895a32cf SK |
83 | (for-each thread-wait threads) |
84 | results) | |
85 | ||
b201e854 SK |
86 | (define (msg-print out-format odd msg) |
87 | (printf | |
88 | (match out-format | |
89 | ['single-line "~a \033[1;37m<~a ~a>\033[0m \033[0;~am~a\033[0m~n"] | |
90 | ['multi-line "~a~n\033[1;37m<~a ~a>\033[0m~n\033[0;~am~a\033[0m~n~n"] | |
91 | [_ (raise (format "Invalid output format: ~a" out-format))]) | |
87d0eb92 | 92 | (date->string (seconds->date [msg-ts_epoch msg]) #t) |
b201e854 SK |
93 | (msg-nick msg) |
94 | (msg-uri msg) | |
95 | (if odd 36 33) | |
96 | (msg-text msg))) | |
e96264cc SK |
97 | |
98 | (define re-msg-begin | |
99 | ; TODO Zulu offset. Maybe in several formats. Which ones? | |
100 | (pregexp "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}")) | |
88d50b3e | 101 | |
b201e854 | 102 | (define (str->msg nick uri str) |
88d50b3e SK |
103 | (if (not (regexp-match? re-msg-begin str)) |
104 | (begin | |
105 | (log-debug "Non-msg line from nick:~a, line:~a" nick str) | |
106 | #f) | |
107 | (let ([toks (string-split str (regexp "\t+"))]) | |
108 | (if (not (= 2 (length toks))) | |
109 | (begin | |
110 | (log-warning "Invalid msg line from nick:~a, msg:~a" nick str) | |
111 | #f) | |
112 | (let* | |
87d0eb92 SK |
113 | ([ts_rfc3339 (first toks)] |
114 | [text (second toks)] | |
115 | [t (string->rfc3339-record ts_rfc3339)] | |
88d50b3e | 116 | ; TODO handle tz offset |
87d0eb92 | 117 | [ts_epoch (find-seconds [rfc3339-record:second t] |
88d50b3e SK |
118 | [rfc3339-record:minute t] |
119 | [rfc3339-record:hour t] | |
120 | [rfc3339-record:mday t] | |
121 | [rfc3339-record:month t] | |
122 | [rfc3339-record:year t])]) | |
87d0eb92 | 123 | (msg ts_epoch ts_rfc3339 nick uri text)))))) |
88d50b3e | 124 | |
e96264cc SK |
125 | (define (str->lines str) |
126 | (string-split str (regexp "[\r\n]+"))) | |
127 | ||
b201e854 SK |
128 | (define (str->msgs nick uri str) |
129 | (filter-map (λ (line) (str->msg nick uri line)) (str->lines str))) | |
4764ff89 | 130 | |
1d753430 SK |
131 | (define (hash-sha1 str) |
132 | (define in (open-input-string str)) | |
133 | (define digest (sha1 in)) | |
134 | (close-input-port in) | |
135 | digest) | |
136 | ||
4764ff89 SK |
137 | (define (uri-fetch uri) |
138 | (log-info "GET ~a" uri) | |
139 | (define resp (http-get uri)) | |
140 | (define status (http-response-code resp)) | |
141 | (define body (http-response-body resp)) | |
142 | (log-debug "finished GET ~a status:~a body length:~a" | |
143 | uri status (string-length body)) | |
144 | ; TODO Handle redirects | |
1d753430 SK |
145 | (if (= status 200) |
146 | (let* | |
147 | ([url-digest | |
148 | (hash-sha1 uri)] | |
149 | [cache-file-path | |
150 | (expand-user-path (string-append "~/.tt/cache/" url-digest))]) | |
151 | (display-to-file | |
152 | body cache-file-path | |
153 | #:exists 'replace) | |
154 | body) | |
155 | ; TODO A more-informative exception | |
156 | (raise status))) | |
4764ff89 | 157 | |
b201e854 | 158 | (define (timeline-print out-format timeline) |
4764ff89 SK |
159 | (for ([msg timeline] |
160 | [i (in-naturals)]) | |
b201e854 | 161 | (msg-print out-format (odd? i) msg))) |
4764ff89 | 162 | |
9a6a9f9a SK |
163 | (define (feed->msgs feed) |
164 | (log-info "downloading feed nick:~a uri:~a" | |
165 | (feed-nick feed) | |
166 | (feed-uri feed)) | |
167 | (with-handlers | |
168 | ([exn:fail:network? | |
169 | (λ (e) | |
170 | (log-error "network error nick:~a uri:~a exn:~a" | |
171 | (feed-nick feed) | |
172 | (feed-uri feed) | |
173 | e) | |
174 | #f)] | |
175 | [integer? | |
176 | (λ (status) | |
177 | (log-error "http error nick:~a uri:~a status:~a" | |
178 | (feed-nick feed) | |
179 | (feed-uri feed) | |
180 | status) | |
181 | #f)]) | |
b201e854 SK |
182 | (define uri (feed-uri feed)) |
183 | (str->msgs [feed-nick feed] uri [uri-fetch uri]))) | |
9a6a9f9a SK |
184 | |
185 | ; TODO timeline contract : time-sorted list of messages | |
895a32cf SK |
186 | (define (timeline num_workers feeds) |
187 | (sort (append* (concurrent-filter-map num_workers feed->msgs feeds)) | |
87d0eb92 | 188 | (λ (a b) [< (msg-ts_epoch a) (msg-ts_epoch b)]))) |
4764ff89 | 189 | |
be96956c SK |
190 | (define (str->feed str) |
191 | ; TODO validation | |
192 | (define toks (string-split str)) | |
87d0eb92 | 193 | (apply feed toks)) |
be96956c SK |
194 | |
195 | (define (str->feeds str) | |
196 | (map str->feed (str->lines str))) | |
197 | ||
198 | (define (file->feeds filename) | |
199 | (str->feeds (file->string filename))) | |
200 | ||
4764ff89 | 201 | (define (we-are-twtxt) |
be96956c SK |
202 | (define uri |
203 | "https://raw.githubusercontent.com/mdom/we-are-twtxt/master/we-are-twtxt.txt") | |
204 | (str->feeds (uri-fetch uri))) | |
4764ff89 | 205 | |
e96264cc | 206 | (define (setup-logging) |
4764ff89 SK |
207 | (define logger (make-logger #f #f 'debug #f)) |
208 | (define log-chan (make-log-receiver logger 'debug)) | |
209 | (void (thread (λ () | |
210 | [date-display-format 'iso-8601] | |
211 | [let loop () | |
212 | (define data (sync log-chan)) | |
213 | (define level (vector-ref data 0)) | |
214 | (define msg (vector-ref data 1)) | |
215 | (define ts (date->string (current-date) #t)) | |
216 | (eprintf "~a [~a] ~a~n" ts level msg) | |
217 | (loop)]))) | |
218 | (current-logger logger)) | |
219 | ||
220 | (define (main) | |
8fae9613 SK |
221 | (define user-agent |
222 | (let* | |
223 | ([prog-name "tt"] | |
1d753430 | 224 | [prog-version "0.3.4"] |
a991df6f | 225 | [prog-uri "https://github.com/xandkar/tt"] |
8fae9613 | 226 | [user-feed-file (expand-user-path "~/twtxt-me.txt")] |
a991df6f SK |
227 | [user |
228 | (if (file-exists? user-feed-file) | |
229 | (let ([user (first (file->feeds user-feed-file))]) | |
230 | (format "+~a; @~a" (feed-uri user) (feed-nick user))) | |
231 | (format "+~a" prog-uri))] | |
232 | ) | |
233 | (format "~a/~a (~a)" prog-name prog-version user))) | |
8fae9613 | 234 | |
e96264cc | 235 | (setup-logging) |
4764ff89 | 236 | (current-http-response-auto #f) |
8fae9613 | 237 | (current-http-user-agent user-agent) |
4764ff89 | 238 | (date-display-format 'rfc2822) |
e96264cc | 239 | |
be96956c SK |
240 | (define args (current-command-line-arguments)) |
241 | (define feeds | |
242 | (if (vector-empty? args) | |
243 | (we-are-twtxt) | |
244 | (file->feeds (vector-ref args 0)))) | |
b201e854 | 245 | (define out-format 'multi-line) |
895a32cf SK |
246 | (define num_workers 15) ; 15 was fastest out of the tried 1, 5, 10, 15 and 20. |
247 | (timeline-print out-format (timeline num_workers feeds))) | |
4764ff89 SK |
248 | |
249 | (main) |