1 ;;; gnus-gl.el --- an interface to GroupLens for Gnus
2 ;; Copyright (C) 1995,96,97,98 Free Software Foundation, Inc.
4 ;; Author: Brad Miller <bmiller@cs.umn.edu>
5 ;; Keywords: news, score
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
26 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
27 ;; GroupLens software and documentation is copyright (c) 1995 by Paul
28 ;; Resnick (Massachusetts Institute of Technology); Brad Miller, John
29 ;; Riedl, Jon Herlocker, and Joseph Konstan (University of Minnesota),
30 ;; and David Maltz (Carnegie-Mellon University).
32 ;; Permission to use, copy, modify, and distribute this documentation
33 ;; for non-commercial and commercial purposes without fee is hereby
34 ;; granted provided that this copyright notice and permission notice
35 ;; appears in all copies and that the names of the individuals and
36 ;; institutions holding this copyright are not used in advertising or
37 ;; publicity pertaining to this software without specific, written
38 ;; prior permission. The copyright holders make no representations
39 ;; about the suitability of this software and documentation for any
40 ;; purpose. It is provided ``as is'' without express or implied
43 ;; The copyright holders request that they be notified of
44 ;; modifications of this code. Please send electronic mail to
45 ;; grouplens@cs.umn.edu for more information or to announce derived
47 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
48 ;; Author: Brad Miller
50 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
52 ;; User Documentation:
53 ;; To use GroupLens you must load this file.
54 ;; You must also register a pseudonym with the Better Bit Bureau.
55 ;; http://www.cs.umn.edu/Research/GroupLens
57 ;; ---------------- For your .emacs or .gnus file ----------------
59 ;; As of version 2.5, grouplens now works as a minor mode of
60 ;; gnus-summary-mode. To get make that work you just need a couple of
62 ;; (setq gnus-use-grouplens t)
63 ;; (setq grouplens-pseudonym "")
64 ;; (setq grouplens-bbb-host "grouplens.cs.umn.edu")
66 ;; (setq gnus-summary-default-score 0)
69 ;; How do I Rate an article??
70 ;; Before you type n to go to the next article, hit a number from 1-5
71 ;; Type r in the summary buffer and you will be prompted.
72 ;; Note that when you're in grouplens-minor-mode 'r' masks the
73 ;; usual reply binding for 'r'
75 ;; What if, Gasp, I find a bug???
76 ;; Please type M-x gnus-gl-submit-bug-report. This will set up a
77 ;; mail buffer with the state of variables and buffers that will help
78 ;; me debug the problem. A short description up front would help too!
80 ;; How do I display the prediction for an article:
81 ;; If you set the gnus-summary-line-format as shown above, the score
82 ;; (prediction) will be shown automatically.
85 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
88 ;; gnus-scores-articles contains the articles
89 ;; When scoring is done, the call tree looks something like:
90 ;; gnus-possibly-score-headers
91 ;; ==> gnus-score-headers
92 ;; ==> gnus-score-load-file
93 ;; ==> get-all-mids (from the eval form)
95 ;; it would be nice to have one that gets called after all the other
96 ;; headers have been scored.
97 ;; we may want a variable gnus-grouplens-scale-factor
98 ;; and gnus-grouplens-offset this would probably be either -3 or 0
99 ;; to make the scores centered around zero or not.
101 ;; According to Lars, Norse god of gnus, the simple way to insert a
102 ;; call to an external function is to have a function added to the
103 ;; variable gnus-score-find-files-function This new function
104 ;; gnus-grouplens-score-alist will return a core alist that
105 ;; has (("message-id" ("<message-id-xxxx>" score) ("<message-id-xxxy>" score))
106 ;; This seems like it would be pretty inefficient, though workable.
108 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
110 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
112 ;; 3. Add some more ways to rate messages
113 ;; 4. Better error handling for token timeouts.
115 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
117 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
122 (eval-when-compile (require 'cl))
124 (require 'gnus-score)
127 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
129 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
131 (defvar gnus-summary-grouplens-line-format
132 "%U\%R\%z%l%I\%(%[%4L: %-20,20n%]%) %s\n"
133 "*The line format spec in summary GroupLens mode buffers.")
135 (defvar grouplens-pseudonym ""
137 This pseudonym is obtained during the registration process")
139 (defvar grouplens-bbb-host "grouplens.cs.umn.edu"
140 "Host where the bbbd is running" )
142 (defvar grouplens-bbb-port 9000
143 "Port where the bbbd is listening" )
145 (defvar grouplens-newsgroups
146 '("comp.groupware" "comp.human-factors" "comp.lang.c++"
147 "comp.lang.java" "comp.os.linux.admin" "comp.os.linux.advocacy"
148 "comp.os.linux.announce" "comp.os.linux.answers"
149 "comp.os.linux.development" "comp.os.linux.development.apps"
150 "comp.os.linux.development.system" "comp.os.linux.hardware"
151 "comp.os.linux.help" "comp.os.linux.m68k" "comp.os.linux.misc"
152 "comp.os.linux.networking" "comp.os.linux.setup" "comp.os.linux.x"
153 "mn.general" "rec.arts.movies" "rec.arts.movies.current-films"
154 "rec.food.recipes" "rec.humor")
155 "*Groups that are part of the GroupLens experiment.")
157 (defvar grouplens-prediction-display 'prediction-spot
159 prediction-spot -- an * corresponding to the prediction between 1 and 5,
160 confidence-interval -- a numeric confidence interval
161 prediction-bar -- |##### | the longer the bar, the better the article,
162 confidence-bar -- | ----- } the prediction is in the middle of the bar,
163 confidence-spot -- ) * | the spot gets bigger with more confidence,
164 prediction-num -- plain-old numeric value,
165 confidence-plus-minus -- prediction +/i confidence")
167 (defvar grouplens-score-offset 0
168 "Offset the prediction by this value.
169 Setting this variable to -2 would have the following effect on
178 The reason is that a user might want to do this is to combine
179 GroupLens predictions with scores calculated by other score methods.")
181 (defvar grouplens-score-scale-factor 1
182 "This variable allows the user to magnify the effect of GroupLens scores.
183 The scale factor is applied after the offset.")
185 (defvar gnus-grouplens-override-scoring 'override
186 "Tell GroupLens to override the normal Gnus scoring mechanism.
187 GroupLens scores can be combined with gnus scores in one of three ways.
188 'override -- just use grouplens predictions for grouplens groups
189 'combine -- combine grouplens scores with gnus scores
190 'separate -- treat grouplens scores completely separate from gnus")
193 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
194 ;;;; Program global variables
195 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
196 (defvar grouplens-bbb-token nil
197 "Current session token number")
199 (defvar grouplens-bbb-process nil
200 "Process Id of current bbbd network stream process")
202 (defvar grouplens-bbb-buffer nil
203 "Buffer associated with the BBBD process")
205 (defvar grouplens-rating-alist nil
206 "Current set of message-id rating pairs")
208 (defvar grouplens-current-hashtable nil
209 "A hashtable to hold predictions from the BBB")
211 (defvar grouplens-current-group nil)
213 ;;(defvar bbb-alist nil)
215 (defvar bbb-timeout-secs 10
216 "Number of seconds to wait for some response from the BBB.
217 If this times out we give up and assume that something has died..." )
219 (defvar grouplens-previous-article nil
220 "Message-ID of the last article read.")
222 (defvar bbb-read-point)
223 (defvar bbb-response-point)
225 (defun bbb-renew-hash-table ()
226 (setq grouplens-current-hashtable (make-vector 100 0)))
228 (bbb-renew-hash-table)
230 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
231 ;;;; Utility Functions
232 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
234 (defun bbb-connect-to-bbbd (host port)
235 (unless grouplens-bbb-buffer
236 (setq grouplens-bbb-buffer
237 (gnus-get-buffer-create (format " *BBBD trace: %s*" host)))
239 (set-buffer grouplens-bbb-buffer)
240 (make-local-variable 'bbb-read-point)
241 (make-local-variable 'bbb-response-point)
242 (setq bbb-read-point (point-min))))
244 ;; if an old process is still running for some reason, kill it
245 (when grouplens-bbb-process
247 (when (eq 'open (process-status grouplens-bbb-process))
248 (set-process-buffer grouplens-bbb-process nil)
249 (delete-process grouplens-bbb-process))))
251 ;; clear the trace buffer of old output
253 (set-buffer grouplens-bbb-buffer)
256 ;; open the connection to the server
258 (condition-case error
259 (setq grouplens-bbb-process
260 (open-network-stream "BBBD" grouplens-bbb-buffer host port))
261 (error (gnus-message 3 "Error: Failed to connect to BBB")
263 (and (null grouplens-bbb-process)
266 (set-buffer grouplens-bbb-buffer)
267 (setq bbb-read-point (point-min))
268 (or (bbb-read-response grouplens-bbb-process)
271 ;; return the process
272 grouplens-bbb-process)
274 (defun bbb-send-command (process command)
275 (goto-char (point-max))
278 (setq bbb-read-point (point))
279 (setq bbb-response-point (point))
280 (set-marker (process-mark process) (point)) ; process output also comes here
281 (process-send-string process command)
282 (process-send-string process "\r\n")
283 (process-send-eof process))
285 (defun bbb-read-response (process)
286 "This function eats the initial response of OK or ERROR from the BBB."
287 (let ((case-fold-search nil)
289 (goto-char bbb-read-point)
290 (while (and (not (search-forward "\r\n" nil t))
291 (accept-process-output process bbb-timeout-secs))
292 (goto-char bbb-read-point))
293 (setq match-end (point))
294 (goto-char bbb-read-point)
295 (setq bbb-read-point match-end)
298 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
300 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
302 "return the token number if login is successful, otherwise return nil."
304 (setq grouplens-bbb-token nil)
305 (if (not (equal grouplens-pseudonym ""))
307 (bbb-connect-to-bbbd grouplens-bbb-host grouplens-bbb-port)))
310 (set-buffer (process-buffer bbb-process))
311 (bbb-send-command bbb-process
312 (concat "login " grouplens-pseudonym))
313 (if (bbb-read-response bbb-process)
314 (setq grouplens-bbb-token (bbb-extract-token-number))
315 (gnus-message 3 "Error: GroupLens login failed")))))
316 (gnus-message 3 "Error: you must set a pseudonym"))
319 (defun bbb-extract-token-number ()
320 (let ((token-pos (search-forward "token=" nil t)))
321 (when (looking-at "[0-9]+")
322 (buffer-substring token-pos (match-end 0)))))
324 (gnus-add-shutdown 'bbb-logout 'gnus)
327 "logout of bbb session."
328 (when grouplens-bbb-token
330 (bbb-connect-to-bbbd grouplens-bbb-host grouplens-bbb-port)))
333 (set-buffer (process-buffer bbb-process))
334 (bbb-send-command bbb-process (concat "logout " grouplens-bbb-token))
335 (bbb-read-response bbb-process))))))
337 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
339 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
341 (defun bbb-build-mid-scores-alist (groupname)
342 "this function can be called as part of the function to return the list of score files to use.
343 See the gnus variable gnus-score-find-score-files-function.
345 *Note:* If you want to use grouplens scores along with calculated scores,
346 you should see the offset and scale variables. At this point, I don't
347 recommend using both scores and grouplens predictions together."
348 (setq grouplens-current-group groupname)
349 (when (member groupname grouplens-newsgroups)
350 (setq grouplens-previous-article nil)
351 ;; scores-alist should be a list of lists:
352 ;; ((("message-id" ("<mid1>" score1 nil s) ("<mid2> score2 nil s))))
353 ;;`((("message-id" . ,predict-list))) ; Yes, this is the return value
356 (list (append (list "message-id")
357 (bbb-get-predictions (bbb-get-all-mids) groupname)))))))
359 (defun bbb-get-predictions (midlist groupname)
360 "Ask the bbb for predictions, and build up the score alist."
361 (gnus-message 5 "Fetching Predictions...")
362 (if grouplens-bbb-token
363 (let ((bbb-process (bbb-connect-to-bbbd grouplens-bbb-host
364 grouplens-bbb-port)))
367 (set-buffer (process-buffer bbb-process))
368 (bbb-send-command bbb-process
369 (bbb-build-predict-command midlist groupname
370 grouplens-bbb-token))
371 (if (bbb-read-response bbb-process)
372 (bbb-get-prediction-response bbb-process)
373 (gnus-message 1 "Invalid Token, login and try again")
375 (gnus-message 3 "Error: You are not logged in to a BBB")
378 (defun bbb-get-all-mids ()
379 (mapcar (function (lambda (x) (mail-header-id x))) gnus-newsgroup-headers))
381 (defun bbb-build-predict-command (mlist grpname token)
382 (concat "getpredictions " token " " grpname "\r\n"
383 (mapconcat 'identity mlist "\r\n") "\r\n.\r\n"))
385 (defun bbb-get-prediction-response (process)
386 (let ((case-fold-search nil))
387 (goto-char bbb-read-point)
388 (while (and (not (search-forward ".\r\n" nil t))
389 (accept-process-output process bbb-timeout-secs))
390 (goto-char bbb-read-point))
391 (goto-char (+ bbb-response-point 4));; we ought to be right before OK
392 (bbb-build-response-alist)))
394 ;; build-response-alist assumes that the cursor has been positioned at
395 ;; the first line of the list of mid/rating pairs.
396 (defun bbb-build-response-alist ()
400 ((looking-at "\\(<.*>\\) :nopred=")
401 ;;(push `(,(bbb-get-mid) ,gnus-summary-default-score nil s) resp)
404 ((looking-at "\\(<.*>\\) :pred=\\([0-9]\.[0-9][0-9]\\) :conflow=\\([0-9]\.[0-9][0-9]\\) :confhigh=\\([0-9]\.[0-9][0-9]\\)")
405 (setq mid (bbb-get-mid)
407 (push `(,mid ,pred nil s) resp)
408 (gnus-sethash mid (list pred (bbb-get-confl) (bbb-get-confh))
409 grouplens-current-hashtable)
412 ((looking-at "\\(<.*>\\) :pred=\\([0-9]\.[0-9][0-9]\\)")
413 (setq mid (bbb-get-mid)
415 (push `(,mid ,pred nil s) resp)
416 (gnus-sethash mid (list pred 0 0) grouplens-current-hashtable)
422 ;; these "get" functions assume that there is an active match lying
423 ;; around. Where the first parenthesized expression is the
424 ;; message-id, and the second is the prediction, the third and fourth
425 ;; are the confidence interval
427 ;; Since gnus assumes that scores are integer values?? we round the
429 (defun bbb-get-mid ()
430 (buffer-substring (match-beginning 1) (match-end 1)))
432 (defun bbb-get-pred ()
433 (let ((tpred (string-to-number (buffer-substring (match-beginning 2)
436 (round (* grouplens-score-scale-factor
437 (+ grouplens-score-offset tpred)))
440 (defun bbb-get-confl ()
441 (string-to-number (buffer-substring (match-beginning 4) (match-end 4))))
443 (defun bbb-get-confh ()
444 (string-to-number (buffer-substring (match-beginning 4) (match-end 4))))
446 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
447 ;;;; Prediction Display
448 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
449 (defconst grplens-rating-range 4.0)
450 (defconst grplens-maxrating 5)
451 (defconst grplens-minrating 1)
452 (defconst grplens-predstringsize 12)
454 (defvar gnus-tmp-score)
455 (defun bbb-grouplens-score (header)
456 (if (eq gnus-grouplens-override-scoring 'separate)
457 (bbb-grouplens-other-score header)
458 (let* ((rate-string (make-string 12 ?\ ))
459 (mid (mail-header-id header))
460 (hashent (gnus-gethash mid grouplens-current-hashtable))
461 (iscore gnus-tmp-score)
462 (low (car (cdr hashent)))
463 (high (car (cdr (cdr hashent)))))
464 (aset rate-string 0 ?|)
465 (aset rate-string 11 ?|)
466 (unless (member grouplens-current-group grouplens-newsgroups)
467 (unless (equal grouplens-prediction-display 'prediction-num)
474 (if (and (bbb-valid-score iscore)
478 ((equal grouplens-prediction-display 'prediction-spot)
479 (setq rate-string (bbb-fmt-prediction-spot rate-string iscore)))
480 ;; confidence-interval
481 ((equal grouplens-prediction-display 'confidence-interval)
482 (setq rate-string (bbb-fmt-confidence-interval iscore low high)))
484 ((equal grouplens-prediction-display 'prediction-bar)
485 (setq rate-string (bbb-fmt-prediction-bar rate-string iscore)))
487 ((equal grouplens-prediction-display 'confidence-bar)
488 (setq rate-string (format "| %4.2f |" iscore)))
490 ((equal grouplens-prediction-display 'confidence-spot)
491 (setq rate-string (format "| %4.2f |" iscore)))
493 ((equal grouplens-prediction-display 'prediction-num)
494 (setq rate-string (bbb-fmt-prediction-num iscore)))
495 ;; confidence-plus-minus
496 ((equal grouplens-prediction-display 'confidence-plus-minus)
497 (setq rate-string (bbb-fmt-confidence-plus-minus iscore low high))
499 (t (gnus-message 3 "Invalid prediction display type")))
500 (aset rate-string 5 ?N) (aset rate-string 6 ?A))
503 ;; Gnus user format function that doesn't depend on
504 ;; bbb-build-mid-scores-alist being used as the score function, but is
505 ;; instead called from gnus-select-group-hook. -- LAB
506 (defun bbb-grouplens-other-score (header)
507 (if (not (member grouplens-current-group grouplens-newsgroups))
508 ;; Return an empty string
510 (let* ((rate-string (make-string 12 ?\ ))
511 (mid (mail-header-id header))
512 (hashent (gnus-gethash mid grouplens-current-hashtable))
513 (pred (or (nth 0 hashent) 0))
514 (low (nth 1 hashent))
515 (high (nth 2 hashent)))
517 (aset rate-string 0 ?|)
518 (aset rate-string 11 ?|)
519 (unless (equal grouplens-prediction-display 'prediction-num)
524 ;; If no entry in BBB hash mark rate string as NA and return
527 (aset rate-string 5 ?N)
528 (aset rate-string 6 ?A)
531 ((equal grouplens-prediction-display 'prediction-spot)
532 (bbb-fmt-prediction-spot rate-string pred))
534 ((equal grouplens-prediction-display 'confidence-interval)
535 (bbb-fmt-confidence-interval pred low high))
537 ((equal grouplens-prediction-display 'prediction-bar)
538 (bbb-fmt-prediction-bar rate-string pred))
540 ((equal grouplens-prediction-display 'confidence-bar)
541 (format "| %4.2f |" pred))
543 ((equal grouplens-prediction-display 'confidence-spot)
544 (format "| %4.2f |" pred))
546 ((equal grouplens-prediction-display 'prediction-num)
547 (bbb-fmt-prediction-num pred))
549 ((equal grouplens-prediction-display 'confidence-plus-minus)
550 (bbb-fmt-confidence-plus-minus pred low high))
553 (gnus-message 3 "Invalid prediction display type")
554 (aset rate-string 0 ?|)
555 (aset rate-string 11 ?|)
558 (defun bbb-valid-score (score)
559 (or (equal grouplens-prediction-display 'prediction-num)
560 (and (>= score grplens-minrating)
561 (<= score grplens-maxrating))))
563 (defun bbb-requires-confidence (format-type)
564 (or (equal format-type 'confidence-plus-minus)
565 (equal format-type 'confidence-spot)
566 (equal format-type 'confidence-interval)))
568 (defun bbb-have-confidence (clow chigh)
572 (defun bbb-fmt-prediction-spot (rate-string score)
574 (round (* (/ (- score grplens-minrating) grplens-rating-range)
575 (+ (- grplens-predstringsize 4) 1.49)))
579 (defun bbb-fmt-confidence-interval (score low high)
580 (if (bbb-have-confidence low high)
581 (format "|%4.2f-%4.2f |" low high)
582 (bbb-fmt-prediction-num score)))
584 (defun bbb-fmt-confidence-plus-minus (score low high)
585 (if (bbb-have-confidence low high)
586 (format "|%3.1f+/-%4.2f|" score (/ (- high low) 2.0))
587 (bbb-fmt-prediction-num score)))
589 (defun bbb-fmt-prediction-bar (rate-string score)
591 (step (/ grplens-rating-range (- grplens-predstringsize 4)))
592 (half-step (/ step 2))
593 (loc (- grplens-minrating half-step)))
594 (while (< i (- grplens-predstringsize 2))
596 (aset rate-string i ?#)
597 (aset rate-string i ?\ ))
599 (setq loc (+ loc step)))
603 (defun bbb-fmt-prediction-num (score)
604 (format "| %4.2f |" score))
606 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
608 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
610 (defun bbb-put-ratings ()
611 (if (and grouplens-bbb-token
612 grouplens-rating-alist
613 (member gnus-newsgroup-name grouplens-newsgroups))
614 (let ((bbb-process (bbb-connect-to-bbbd grouplens-bbb-host
616 (rate-command (bbb-build-rate-command grouplens-rating-alist)))
619 (set-buffer (process-buffer bbb-process))
620 (gnus-message 5 "Sending Ratings...")
621 (bbb-send-command bbb-process rate-command)
622 (if (bbb-read-response bbb-process)
623 (setq grouplens-rating-alist nil)
625 "Token timed out: call bbb-login and quit again")
627 (gnus-message 5 "Sending Ratings...Done"))
628 (gnus-message 3 "No BBB connection")))
629 (setq grouplens-rating-alist nil)))
631 (defun bbb-build-rate-command (rate-alist)
632 (concat "putratings " grouplens-bbb-token " " grouplens-current-group " \r\n"
633 (mapconcat '(lambda (this) ; form (mid . (score . time))
635 " :rating=" (cadr this) ".00"
636 " :time=" (cddr this)))
640 ;; Interactive rating functions.
641 (defun bbb-summary-rate-article (rating &optional midin)
642 (interactive "nRating: ")
643 (when (member gnus-newsgroup-name grouplens-newsgroups)
644 (let ((mid (or midin (bbb-get-current-id))))
646 (>= rating grplens-minrating)
647 (<= rating grplens-maxrating)
649 (let ((oldrating (assoc mid grouplens-rating-alist)))
651 (setcdr oldrating (cons rating 0))
652 (push `(,mid . (,rating . 0)) grouplens-rating-alist))
653 (gnus-summary-mark-article nil (int-to-string rating)))
654 (gnus-message 3 "Invalid rating")))))
656 (defun grouplens-next-unread-article (rating)
657 "Select unread article after current one."
660 (bbb-summary-rate-article rating))
661 (gnus-summary-next-unread-article))
663 (defun grouplens-best-unread-article (rating)
664 "Select unread article after current one."
667 (bbb-summary-rate-article rating))
668 (gnus-summary-best-unread-article))
670 (defun grouplens-summary-catchup-and-exit (rating)
671 "Mark all articles not marked as unread in this newsgroup as read, then exit.
672 If prefix argument ALL is non-nil, all articles are marked as read."
675 (bbb-summary-rate-article rating))
677 (gnus-summary-catchup-and-exit)
678 (gnus-summary-catchup-and-exit rating)))
680 (defun grouplens-score-thread (score)
681 "Raise the score of the articles in the current thread with SCORE."
682 (interactive "nRating: ")
685 (let ((articles (gnus-summary-articles-in-thread))
687 (while (setq article (pop articles))
688 (gnus-summary-goto-subject article)
689 (bbb-summary-rate-article score
691 (gnus-summary-article-header article)))))
693 (let ((gnus-summary-check-current t))
694 (or (zerop (gnus-summary-next-subject 1 t))
696 (gnus-summary-recenter)
697 (gnus-summary-position-point)
698 (gnus-set-mode-line 'summary))
700 (defun bbb-exit-group ()
702 (bbb-renew-hash-table))
704 (defun bbb-get-current-id ()
705 (if gnus-current-headers
706 (mail-header-id gnus-current-headers)
707 (gnus-message 3 "You must select an article before you rate it")))
709 (defun bbb-grouplens-group-p (group)
710 "Say whether GROUP is a GroupLens group."
711 (if (member group grouplens-newsgroups) " (GroupLens Enhanced)" ""))
713 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
714 ;; TIME SPENT READING
715 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
716 (defvar grouplens-current-starting-time nil)
718 (defun grouplens-start-timer ()
719 (setq grouplens-current-starting-time (current-time)))
721 (defun grouplens-elapsed-time ()
722 (let ((et (bbb-time-float (current-time))))
723 (- et (bbb-time-float grouplens-current-starting-time))))
725 (defun bbb-time-float (timeval)
726 (+ (* (car timeval) 65536)
729 (defun grouplens-do-time ()
730 (when (member gnus-newsgroup-name grouplens-newsgroups)
731 (when grouplens-previous-article
732 (let ((elapsed-time (grouplens-elapsed-time))
733 (oldrating (assoc grouplens-previous-article
734 grouplens-rating-alist)))
736 (push `(,grouplens-previous-article . (0 . ,elapsed-time))
737 grouplens-rating-alist)
738 (setcdr oldrating (cons (cadr oldrating) elapsed-time)))))
739 (grouplens-start-timer)
740 (setq grouplens-previous-article (bbb-get-current-id))))
742 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
744 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
746 (defconst gnus-gl-version "gnus-gl.el 2.50")
747 (defconst gnus-gl-maintainer-address "grouplens-bug@cs.umn.edu")
748 (defun gnus-gl-submit-bug-report ()
749 "Submit via mail a bug report on gnus-gl."
752 (reporter-submit-bug-report gnus-gl-maintainer-address
753 (concat "gnus-gl.el " gnus-gl-version)
754 (list 'grouplens-pseudonym
757 'grouplens-newsgroups
759 'grouplens-bbb-process
760 'grouplens-current-group
761 'grouplens-previous-article)
765 (defun gnus-gl-get-trace ()
766 "Insert the contents of the BBBD trace buffer."
767 (when grouplens-bbb-buffer
768 (insert-buffer grouplens-bbb-buffer)))
771 ;; GroupLens minor mode
774 (defvar gnus-grouplens-mode nil
775 "Minor mode for providing a GroupLens interface in Gnus summary buffers.")
777 (defvar gnus-grouplens-mode-map nil)
779 (unless gnus-grouplens-mode-map
780 (setq gnus-grouplens-mode-map (make-keymap))
782 gnus-grouplens-mode-map
783 "n" grouplens-next-unread-article
784 "r" bbb-summary-rate-article
785 "k" grouplens-score-thread
786 "c" grouplens-summary-catchup-and-exit
787 "," grouplens-best-unread-article))
789 (defun gnus-grouplens-make-menu-bar ()
790 (unless (boundp 'gnus-grouplens-menu)
792 gnus-grouplens-menu gnus-grouplens-mode-map ""
794 ["Login" bbb-login t]
795 ["Rate" bbb-summary-rate-article t]
796 ["Next article" grouplens-next-unread-article t]
797 ["Best article" grouplens-best-unread-article t]
798 ["Raise thread" grouplens-score-thread t]
799 ["Report bugs" gnus-gl-submit-bug-report t]))))
801 (defun gnus-grouplens-mode (&optional arg)
802 "Minor mode for providing a GroupLens interface in Gnus summary buffers."
804 (when (and (eq major-mode 'gnus-summary-mode)
805 (member gnus-newsgroup-name grouplens-newsgroups))
806 (make-local-variable 'gnus-grouplens-mode)
807 (setq gnus-grouplens-mode
808 (if (null arg) (not gnus-grouplens-mode)
809 (> (prefix-numeric-value arg) 0)))
810 (when gnus-grouplens-mode
811 (make-local-hook 'gnus-select-article-hook)
812 (add-hook 'gnus-select-article-hook 'grouplens-do-time nil 'local)
813 (make-local-hook 'gnus-exit-group-hook)
814 (add-hook 'gnus-exit-group-hook 'bbb-exit-group nil 'local)
815 (make-local-variable 'gnus-score-find-score-files-function)
818 ((eq gnus-grouplens-override-scoring 'combine)
819 ;; either add bbb-buld-mid-scores-alist to a list
821 (if (listp gnus-score-find-score-files-function)
822 (setq gnus-score-find-score-files-function
823 (append 'bbb-build-mid-scores-alist
824 gnus-score-find-score-files-function))
825 (setq gnus-score-find-score-files-function
826 (list gnus-score-find-score-files-function
827 'bbb-build-mid-scores-alist))))
828 ;; leave the gnus-score-find-score-files variable alone
829 ((eq gnus-grouplens-override-scoring 'separate)
830 (add-hook 'gnus-select-group-hook
832 (bbb-get-predictions (bbb-get-all-mids)
833 gnus-newsgroup-name))))
834 ;; default is to override
836 (setq gnus-score-find-score-files-function
837 'bbb-build-mid-scores-alist)))
839 ;; Change how summary lines look
840 (make-local-variable 'gnus-summary-line-format)
841 (make-local-variable 'gnus-summary-line-format-spec)
842 (setq gnus-summary-line-format gnus-summary-grouplens-line-format)
843 (setq gnus-summary-line-format-spec nil)
844 (gnus-update-format-specifications nil 'summary)
845 (gnus-update-summary-mark-positions)
848 (when (and menu-bar-mode
849 (gnus-visual-p 'grouplens-menu 'menu))
850 (gnus-grouplens-make-menu-bar))
852 'gnus-grouplens-mode " GroupLens" gnus-grouplens-mode-map)
853 (gnus-run-hooks 'gnus-grouplens-mode-hook))))
857 ;;; gnus-gl.el ends here