1 ;;; gnus-gl.el --- an interface to GroupLens for Gnus
2 ;; Copyright (C) 1995,96 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' maskes 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 aritcle:
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 (require 'gnus-score)
125 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
127 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
129 (defvar gnus-summary-grouplens-line-format
130 "%U%R%z%l%I%(%[%4L: %-20,20n%]%) %s\n"
131 "*The line format spec in summary GroupLens mode buffers.")
133 (defvar grouplens-pseudonym ""
134 "User's pseudonym. This pseudonym is obtained during the registration process")
136 (defvar grouplens-bbb-host "grouplens.cs.umn.edu"
137 "Host where the bbbd is running" )
139 (defvar grouplens-bbb-port 9000
140 "Port where the bbbd is listening" )
142 (defvar grouplens-newsgroups
143 '("comp.lang.c++" "rec.humor" "rec.food.recipes" "comp.groupware"
144 "mn.general" "rec.arts.movies" "rec.arts.movies.current-films"
145 "comp.lang.java" "comp.os.linux.announce" "comp.os.linux.misc"
146 "comp.os.linux.development.apps" "comp.os.linux.development.system")
147 "*Groups that are part of the GroupLens experiment.")
149 (defvar grouplens-prediction-display 'prediction-spot
151 prediction-spot -- an * corresponding to the prediction between 1 and 5,
152 confidence-interval -- a numeric confidence interval
153 prediction-bar -- |##### | the longer the bar, the better the article,
154 confidence-bar -- | ----- } the prediction is in the middle of the bar,
155 confidence-spot -- ) * | the spot gets bigger with more confidence,
156 prediction-num -- plain-old numeric value,
157 confidence-plus-minus -- prediction +/i confidence")
159 (defvar grouplens-score-offset 0
160 "Offset the prediction by this value.
161 Setting this variable to -2 would have the following effect on
170 The reason is that a user might want to do this is to combine
171 GroupLens predictions with scores calculated by other score methods.")
173 (defvar grouplens-score-scale-factor 1
174 "This variable allows the user to magnify the effect of GroupLens scores.
175 The scale factor is applied after the offset.")
177 (defvar gnus-grouplens-override-scoring 'override
178 "Tell Grouplens to override the normal Gnus scoring mechanism.
179 GroupLens scores can be combined with gnus scores in one of three ways.
180 'override -- just use grouplens predictions for grouplens groups
181 'combine -- combine grouplens scores with gnus scores
182 'separate -- treat grouplens scores completely separate from gnus")
185 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
186 ;;;; Program global variables
187 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
188 (defvar grouplens-bbb-token "0"
189 "Current session token number")
191 (defvar grouplens-bbb-process nil
192 "Process Id of current bbbd network stream process")
194 (defvar grouplens-bbb-buffer nil
195 "Buffer associated with the BBBD process")
197 (defvar grouplens-rating-alist nil
198 "Current set of message-id rating pairs")
200 (defvar grouplens-current-hashtable (make-hash-table :test 'equal :size 100))
201 ;; this seems like a pretty ugly way to get around the problem, but If
202 ;; I don't do this, then the compiler complains when I call gethash
204 (eval-when-compile (setq grouplens-current-hashtable
205 (make-hash-table :test 'equal :size 100)))
207 (defvar grouplens-current-group nil)
209 (defvar bbb-mid-list nil)
211 (defvar bbb-alist nil)
213 (defvar bbb-timeout-secs 10
214 "Number of seconds to wait for some response from the BBB.
215 If this times out we give up and assume that something has died..." )
217 (defvar grouplens-previous-article nil
218 "Message-ID of the last article read.")
220 (defvar bbb-read-point)
221 (defvar bbb-response-point)
223 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
224 ;;;; Utility Functions
225 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
226 (defun bbb-connect-to-bbbd (host port)
227 (unless grouplens-bbb-buffer
228 (setq grouplens-bbb-buffer
229 (get-buffer-create (format " *BBBD trace: %s*" host)))
231 (set-buffer grouplens-bbb-buffer)
232 (make-local-variable 'bbb-read-point)
233 (setq bbb-read-point (point-min))))
234 ;; clear the trace buffer of old output
236 (set-buffer grouplens-bbb-buffer)
238 ;; open the connection to the server
239 (setq grouplens-bbb-process nil)
241 (condition-case error
242 (setq grouplens-bbb-process
243 (open-network-stream "BBBD" grouplens-bbb-buffer host port))
244 (error (gnus-message 3 "Error: Failed to connect to BBB")
246 (and (null grouplens-bbb-process)
248 ;; (set-process-filter grouplens-bbb-process 'bbb-process-filter)
250 (set-buffer grouplens-bbb-buffer)
251 (setq bbb-read-point (point-min))
252 (or (bbb-read-response grouplens-bbb-process)
254 grouplens-bbb-process)
256 ;; (defun bbb-process-filter (process output)
258 ;; (set-buffer (bbb-process-buffer process))
259 ;; (goto-char (point-max))
262 (defun bbb-send-command (process command)
263 (goto-char (point-max))
266 (setq bbb-read-point (point))
267 (setq bbb-response-point (point))
268 (set-marker (process-mark process) (point)) ; process output also comes here
269 (process-send-string process command)
270 (process-send-string process "\r\n"))
272 (defun bbb-read-response (process) ; &optional return-response-string)
273 "This function eats the initial response of OK or ERROR from the BBB."
274 (let ((case-fold-search nil)
276 (goto-char bbb-read-point)
277 (while (and (not (search-forward "\r\n" nil t))
278 (accept-process-output process bbb-timeout-secs))
279 (goto-char bbb-read-point))
280 (setq match-end (point))
281 (goto-char bbb-read-point)
282 (setq bbb-read-point match-end)
285 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
287 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
289 "return the token number if login is successful, otherwise return nil"
291 (setq grouplens-bbb-token nil)
292 (if (not (equal grouplens-pseudonym ""))
294 (bbb-connect-to-bbbd grouplens-bbb-host grouplens-bbb-port)))
297 (set-buffer (process-buffer bbb-process))
298 (bbb-send-command bbb-process
299 (concat "login " grouplens-pseudonym))
300 (if (bbb-read-response bbb-process)
301 (setq grouplens-bbb-token (bbb-extract-token-number))
302 (gnus-message 3 "Error: Grouplens login failed")))))
303 (gnus-message 3 "Error: you must set a pseudonym"))
306 (defun bbb-extract-token-number ()
307 (let ((token-pos (search-forward "token=" nil t) ))
308 (if (looking-at "[0-9]+")
309 (buffer-substring token-pos (match-end 0)))))
311 (gnus-add-shutdown 'bbb-logout 'gnus)
314 "logout of bbb session"
316 (bbb-connect-to-bbbd grouplens-bbb-host grouplens-bbb-port)))
319 (set-buffer (process-buffer bbb-process))
320 (bbb-send-command bbb-process (concat "logout " grouplens-bbb-token))
321 (bbb-read-response bbb-process))
324 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
326 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
328 (defun bbb-build-mid-scores-alist (groupname)
329 "this function can be called as part of the function to return the
330 list of score files to use. See the gnus variable
331 gnus-score-find-score-files-function.
333 *Note:* If you want to use grouplens scores along with calculated scores,
334 you should see the offset and scale variables. At this point, I don't
335 recommend using both scores and grouplens predictions together."
336 (setq grouplens-current-group groupname)
337 (if (member groupname grouplens-newsgroups)
338 (let* ((mid-list (bbb-get-all-mids))
339 (predict-list (bbb-get-predictions mid-list groupname)))
340 (setq grouplens-previous-article nil)
341 ;; scores-alist should be a list of lists:
342 ;; ((("message-id" ("<mid1>" score1 nil s) ("<mid2> score2 nil s))))
343 ;;`((("message-id" . ,predict-list))) ; Yes, this is the return value
344 (list (list (list (append (list "message-id") predict-list)))))
347 (defun bbb-get-predictions (midlist groupname)
348 "Ask the bbb for predictions, and build up the score alist."
349 (if (or (null grouplens-bbb-token)
350 (equal grouplens-bbb-token "0"))
351 (gnus-message 3 "Error: You are not logged in to a BBB")
352 (gnus-message 5 "Fetching Predictions...")
354 (predict-command (bbb-build-predict-command midlist groupname
355 grouplens-bbb-token))
356 (bbb-process (bbb-connect-to-bbbd grouplens-bbb-host
357 grouplens-bbb-port)))
360 (set-buffer (process-buffer bbb-process))
361 (bbb-send-command bbb-process predict-command)
362 (if (bbb-read-response bbb-process)
363 (setq predict-list (bbb-get-prediction-response bbb-process))
364 (gnus-message 1 "Invalid Token, login and try again")
366 (setq bbb-alist predict-list))))
368 (defun bbb-get-all-mids ()
369 (let ((index (nth 1 (assoc "message-id" gnus-header-index)))
370 (articles gnus-newsgroup-headers)
372 (setq bbb-mid-list nil)
374 (progn (setq art (car articles)
375 this (aref art index)
376 articles (cdr articles))
377 (setq bbb-mid-list (cons this bbb-mid-list))))
380 (defun bbb-build-predict-command (mlist grpname token)
381 (let ((cmd (concat "getpredictions " token " " grpname "\r\n"))
384 (setq art (car mlist)
385 cmd (concat cmd art "\r\n")
387 (setq cmd (concat cmd ".\r\n"))
390 (defun bbb-get-prediction-response (process)
391 (let ((case-fold-search nil)
393 (goto-char bbb-read-point)
394 (while (and (not (search-forward ".\r\n" nil t))
395 (accept-process-output process bbb-timeout-secs))
396 (goto-char bbb-read-point))
397 (setq match-end (point))
398 (goto-char (+ bbb-response-point 4)) ;; we ought to be right before OK
399 (bbb-build-response-alist)))
401 ;; build-response-alist assumes that the cursor has been positioned at
402 ;; the first line of the list of mid/rating pairs. For now we will
403 ;; use a prediction of 99 to signify no prediction. Ultimately, we
404 ;; should just ignore messages with no predictions.
405 (defun bbb-build-response-alist ()
408 (setq grouplens-current-hashtable (make-hash-table :test 'equal :size 100))
410 (cond ((looking-at "\\(<.*>\\) :nopred=")
411 (push `(,(bbb-get-mid) ,gnus-summary-default-score nil s) resp)
414 ((looking-at "\\(<.*>\\) :pred=\\([0-9]\.[0-9][0-9]\\) :conflow=\\([0-9]\.[0-9][0-9]\\) :confhigh=\\([0-9]\.[0-9][0-9]\\)")
415 (push `(,(bbb-get-mid) ,(bbb-get-pred) nil s) resp)
416 (cl-puthash (bbb-get-mid)
417 (list (bbb-get-pred) (bbb-get-confl) (bbb-get-confh))
418 grouplens-current-hashtable)
421 ((looking-at "\\(<.*>\\) :pred=\\([0-9]\.[0-9][0-9]\\)")
422 (push `(,(bbb-get-mid) ,(bbb-get-pred) nil s) resp)
423 (cl-puthash (bbb-get-mid)
424 (list (bbb-get-pred) 0 0)
425 grouplens-current-hashtable)
431 ;; these two functions assume that there is an active match lying
432 ;; around. Where the first parenthesized expression is the
433 ;; message-id, and the second is the prediction. Since gnus assumes
434 ;; that scores are integer values?? we round the prediction.
435 (defun bbb-get-mid ()
436 (buffer-substring (match-beginning 1) (match-end 1)))
438 (defun bbb-get-pred ()
439 (let ((tpred (string-to-number (buffer-substring
443 (round (* grouplens-score-scale-factor (+ grouplens-score-offset tpred)))
446 (defun bbb-get-confl ()
447 (string-to-number (buffer-substring (match-beginning 3) (match-end 3))))
449 (defun bbb-get-confh ()
450 (string-to-number (buffer-substring (match-beginning 4) (match-end 4))))
452 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
453 ;;;; Prediction Display
454 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
455 (defconst grplens-rating-range 4.0)
456 (defconst grplens-maxrating 5)
457 (defconst grplens-minrating 1)
458 (defconst grplens-predstringsize 12)
460 (defvar gnus-tmp-score)
461 (defun bbb-grouplens-score (header)
462 (if (eq gnus-grouplens-override-scoring 'separate)
463 (bbb-grouplens-other-score header)
464 (let* ((rate-string (make-string 12 ? ))
465 (mid (aref header (nth 1 (assoc "message-id" gnus-header-index))))
466 (hashent (gethash mid grouplens-current-hashtable))
467 (iscore gnus-tmp-score)
468 (low (car (cdr hashent)))
469 (high (car (cdr (cdr hashent)))))
470 (aset rate-string 0 ?|)
471 (aset rate-string 11 ?|)
472 (unless (member grouplens-current-group grouplens-newsgroups)
473 (unless (equal grouplens-prediction-display 'prediction-num)
480 (if (and (bbb-valid-score iscore)
484 ((equal grouplens-prediction-display 'prediction-spot)
485 (setq rate-string (bbb-fmt-prediction-spot rate-string iscore)))
486 ;; confidence-interval
487 ((equal grouplens-prediction-display 'confidence-interval)
488 (setq rate-string (bbb-fmt-confidence-interval iscore low high)))
490 ((equal grouplens-prediction-display 'prediction-bar)
491 (setq rate-string (bbb-fmt-prediction-bar rate-string iscore)))
493 ((equal grouplens-prediction-display 'confidence-bar)
494 (setq rate-string (format "| %4.2f |" iscore)))
496 ((equal grouplens-prediction-display 'confidence-spot)
497 (setq rate-string (format "| %4.2f |" iscore)))
499 ((equal grouplens-prediction-display 'prediction-num)
500 (setq rate-string (bbb-fmt-prediction-num iscore)))
501 ;; confidence-plus-minus
502 ((equal grouplens-prediction-display 'confidence-plus-minus)
503 (setq rate-string (bbb-fmt-confidence-plus-minus iscore low high))
505 (t (gnus-message 3 "Invalid prediction display type")))
506 (aset rate-string 5 ?N) (aset rate-string 6 ?A))
510 ;; Gnus user format function that doesn't depend on
511 ;; bbb-build-mid-scores-alist being used as the score function, but is
512 ;; instead called from gnus-select-group-hook. -- LAB
513 (defun bbb-grouplens-other-score (header)
514 (if (not (member grouplens-current-group grouplens-newsgroups))
515 ;; Return an empty string
517 (let* ((rate-string (make-string 12 ? ))
518 (mid (aref header (nth 1 (assoc "message-id" gnus-header-index))))
519 (hashent (gethash mid grouplens-current-hashtable))
520 (pred (or (nth 0 hashent) 0))
521 (low (nth 1 hashent))
522 (high (nth 2 hashent)))
524 (aset rate-string 0 ?|)
525 (aset rate-string 11 ?|)
526 (unless (equal grouplens-prediction-display 'prediction-num)
531 ;; If no entry in BBB hash mark rate string as NA and return
534 (aset rate-string 5 ?N)
535 (aset rate-string 6 ?A)
538 ((equal grouplens-prediction-display 'prediction-spot)
539 (bbb-fmt-prediction-spot rate-string pred))
541 ((equal grouplens-prediction-display 'confidence-interval)
542 (bbb-fmt-confidence-interval pred low high))
544 ((equal grouplens-prediction-display 'prediction-bar)
545 (bbb-fmt-prediction-bar rate-string pred))
547 ((equal grouplens-prediction-display 'confidence-bar)
548 (format "| %4.2f |" pred))
550 ((equal grouplens-prediction-display 'confidence-spot)
551 (format "| %4.2f |" pred))
553 ((equal grouplens-prediction-display 'prediction-num)
554 (bbb-fmt-prediction-num pred))
556 ((equal grouplens-prediction-display 'confidence-plus-minus)
557 (bbb-fmt-confidence-plus-minus pred low high))
560 (gnus-message 3 "Invalid prediction display type")
561 (aset rate-string 0 ?|)
562 (aset rate-string 11 ?|)
565 (defun bbb-valid-score (score)
566 (or (equal grouplens-prediction-display 'prediction-num)
567 (and (>= score grplens-minrating)
568 (<= score grplens-maxrating))))
570 (defun bbb-requires-confidence (format-type)
571 (or (equal format-type 'confidence-plus-minus)
572 (equal format-type 'confidence-spot)
573 (equal format-type 'confidence-interval)))
575 (defun bbb-have-confidence (clow chigh)
579 (defun bbb-fmt-prediction-spot (rate-string score)
581 (round (* (/ (- score grplens-minrating) grplens-rating-range)
582 (+ (- grplens-predstringsize 4) 1.49)))
586 (defun bbb-fmt-confidence-interval (score low high)
587 (if (bbb-have-confidence low high)
588 (format "|%4.2f-%4.2f |" low high)
589 (bbb-fmt-prediction-num score)))
591 (defun bbb-fmt-confidence-plus-minus (score low high)
592 (if (bbb-have-confidence low high)
593 (format "|%3.1f+/-%4.2f|" score (/ (- high low) 2.0))
594 (bbb-fmt-prediction-num score)))
596 (defun bbb-fmt-prediction-bar (rate-string score)
598 (step (/ grplens-rating-range (- grplens-predstringsize 4)))
599 (half-step (/ step 2))
600 (loc (- grplens-minrating half-step)))
601 (while (< i (- grplens-predstringsize 2))
603 (aset rate-string i ?#)
604 (aset rate-string i ? ))
606 (setq loc (+ loc step)))
610 (defun bbb-fmt-prediction-num (score)
611 (format "| %4.2f |" score))
613 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
615 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
617 ;; The message-id for the current article can be found in
618 ;; (aref gnus-current-headers (nth 1 (assoc "message-id" gnus-header-index)))
620 (defun bbb-put-ratings ()
621 (if (and grouplens-rating-alist
622 (member gnus-newsgroup-name grouplens-newsgroups))
623 (let ((bbb-process (bbb-connect-to-bbbd grouplens-bbb-host
625 (rate-command (bbb-build-rate-command grouplens-rating-alist)))
628 (set-buffer (process-buffer bbb-process))
629 (gnus-message 5 "Sending Ratings...")
630 (bbb-send-command bbb-process rate-command)
631 (if (bbb-read-response bbb-process)
632 (setq grouplens-rating-alist nil)
634 "Token timed out: call bbb-login and quit again")
636 (gnus-message 5 "Sending Ratings...Done"))
637 (gnus-message 3 "No BBB connection")))
638 (setq grouplens-rating-alist nil)))
640 (defun bbb-build-rate-command (rate-alist)
642 (cmd (concat "putratings " grouplens-bbb-token
643 " " grouplens-current-group " \r\n")))
645 (setq this (car rate-alist)
646 cmd (concat cmd (car this) " :rating=" (cadr this) ".00"
647 " :time=" (cddr this) "\r\n")
648 rate-alist (cdr rate-alist)))
649 (concat cmd ".\r\n")))
651 ;; Interactive rating functions.
652 (defun bbb-summary-rate-article (rating &optional midin)
653 (interactive "nRating: ")
654 (when (member gnus-newsgroup-name grouplens-newsgroups)
655 (let ((mid (or midin (bbb-get-current-id))))
657 (>= rating grplens-minrating)
658 (<= rating grplens-maxrating)
660 (let ((oldrating (assoc mid grouplens-rating-alist)))
662 (setcdr oldrating (cons rating 0))
663 (push `(,mid . (,rating . 0)) grouplens-rating-alist))
664 (gnus-summary-mark-article nil (int-to-string rating)))
665 (gnus-message 3 "Invalid rating")))))
667 (defun grouplens-next-unread-article (rating)
668 "Select unread article after current one."
670 (if rating (bbb-summary-rate-article rating))
671 (gnus-summary-next-unread-article))
673 (defun grouplens-best-unread-article (rating)
674 "Select unread article after current one."
676 (if rating (bbb-summary-rate-article rating))
677 (gnus-summary-best-unread-article))
679 (defun grouplens-summary-catchup-and-exit (rating)
680 "Mark all articles not marked as unread in this newsgroup as read,
681 then exit. If prefix argument ALL is non-nil, all articles are
685 (bbb-summary-rate-article rating))
687 (gnus-summary-catchup-and-exit)
688 (gnus-summary-catchup-and-exit rating)))
690 (defun grouplens-score-thread (score)
691 "Raise the score of the articles in the current thread with SCORE."
692 (interactive "nRating: ")
695 (let ((articles (gnus-summary-articles-in-thread)))
697 (gnus-summary-goto-subject (car articles))
698 (gnus-set-global-variables)
699 (bbb-summary-rate-article score
701 (gnus-summary-article-header
703 (setq articles (cdr articles))))
705 (let ((gnus-summary-check-current t))
706 (or (zerop (gnus-summary-next-subject 1 t))
708 (gnus-summary-recenter)
709 (gnus-summary-position-point)
710 (gnus-set-mode-line 'summary))
713 (defun bbb-get-current-id ()
714 (if gnus-current-headers
715 (aref gnus-current-headers
716 (nth 1 (assoc "message-id" gnus-header-index)))
717 (gnus-message 3 "You must select an article before you rate it")))
719 (defun bbb-grouplens-group-p (group)
720 "Say whether GROUP is a GroupLens group."
721 (if (member group grouplens-newsgroups) " (GroupLens Enhanced)" ""))
723 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
724 ;; TIME SPENT READING
725 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
726 (defvar grouplens-current-starting-time nil)
728 (defun grouplens-start-timer ()
729 (setq grouplens-current-starting-time (current-time)))
731 (defun grouplens-elapsed-time ()
732 (let ((et (bbb-time-float (current-time))))
733 (- et (bbb-time-float grouplens-current-starting-time))))
735 (defun bbb-time-float (timeval)
736 (+ (* (car timeval) 65536)
739 (defun grouplens-do-time ()
740 (when (member gnus-newsgroup-name grouplens-newsgroups)
741 (when grouplens-previous-article
742 (let ((elapsed-time (grouplens-elapsed-time))
743 (oldrating (assoc grouplens-previous-article
744 grouplens-rating-alist)))
746 (push `(,grouplens-previous-article . (0 . ,elapsed-time))
747 grouplens-rating-alist)
748 (setcdr oldrating (cons (cadr oldrating) elapsed-time)))))
749 (grouplens-start-timer)
750 (setq grouplens-previous-article (bbb-get-current-id))))
752 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
754 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
756 (defconst gnus-gl-version "gnus-gl.el 2.12")
757 (defconst gnus-gl-maintainer-address "grouplens-bug@cs.umn.edu")
758 (defun gnus-gl-submit-bug-report ()
759 "Submit via mail a bug report on gnus-gl"
762 (reporter-submit-bug-report gnus-gl-maintainer-address
763 (concat "gnus-gl.el " gnus-gl-version)
764 (list 'grouplens-pseudonym
767 'grouplens-newsgroups
769 'grouplens-bbb-process
770 'grouplens-current-group
771 'grouplens-previous-article
777 (defun gnus-gl-get-trace ()
778 "Insert the contents of the BBBD trace buffer"
779 (if grouplens-bbb-buffer (insert-buffer grouplens-bbb-buffer)))
782 ;;; Additions to make gnus-grouplens-mode Warning Warning!!
783 ;;; This version of the gnus-grouplens-mode does
784 ;;; not work with gnus-5.x. The "old" way of
785 ;;; setting up GroupLens still works however.
787 (defvar gnus-grouplens-mode nil
788 "Minor mode for providing a GroupLens interface in Gnus summary buffers.")
790 (defvar gnus-grouplens-mode-map nil)
792 (unless gnus-grouplens-mode-map
793 (setq gnus-grouplens-mode-map (make-keymap))
795 gnus-grouplens-mode-map
796 "n" grouplens-next-unread-article
797 "r" bbb-summary-rate-article
798 "k" grouplens-score-thread
799 "c" grouplens-summary-catchup-and-exit
800 "," grouplens-best-unread-article))
802 (defun gnus-grouplens-make-menu-bar ()
803 (unless (boundp 'gnus-grouplens-menu)
805 gnus-grouplens-menu gnus-grouplens-mode-map ""
807 ["Login" bbb-login t]
808 ["Rate" bbb-summary-rate-article t]
809 ["Next article" grouplens-next-unread-article t]
810 ["Best article" grouplens-best-unread-article t]
811 ["Raise thread" grouplens-score-thread t]
812 ["Report bugs" gnus-gl-submit-bug-report t]))))
814 (defun gnus-grouplens-mode (&optional arg)
815 "Minor mode for providing a GroupLens interface in Gnus summary buffers."
817 (when (and (eq major-mode 'gnus-summary-mode)
818 (member gnus-newsgroup-name grouplens-newsgroups))
819 (make-local-variable 'gnus-grouplens-mode)
820 (setq gnus-grouplens-mode
821 (if (null arg) (not gnus-grouplens-mode)
822 (> (prefix-numeric-value arg) 0)))
823 (when gnus-grouplens-mode
824 (if (not (fboundp 'make-local-hook))
825 (add-hook 'gnus-select-article-hook 'grouplens-do-time)
826 (make-local-hook 'gnus-select-article-hook)
827 (add-hook 'gnus-select-article-hook 'grouplens-do-time nil 'local))
828 (if (not (fboundp 'make-local-hook))
829 (add-hook 'gnus-exit-group-hook 'bbb-put-ratings)
830 (make-local-hook 'gnus-exit-group-hook)
831 (add-hook 'gnus-exit-group-hook 'bbb-put-ratings nil 'local))
832 (make-local-variable 'gnus-score-find-score-files-function)
833 (cond ((eq gnus-grouplens-override-scoring 'combine)
834 ;; either add bbb-buld-mid-scores-alist to a list
836 (if (listp gnus-score-find-score-files-function)
837 (setq gnus-score-find-score-files-function
838 (append 'bbb-build-mid-scores-alist
839 gnus-score-find-score-files-function ))
840 (setq gnus-score-find-score-files-function
841 (list gnus-score-find-score-files-function
842 'bbb-build-mid-scores-alist))))
843 ;; leave the gnus-score-find-score-files variable alone
844 ((eq gnus-grouplens-override-scoring 'separate)
845 (add-hook 'gnus-select-group-hook
847 (bbb-build-mid-scores-alist gnus-newsgroup-name))))
848 ;; default is to override
849 (t (setq gnus-score-find-score-files-function
850 'bbb-build-mid-scores-alist)))
851 (make-local-variable 'gnus-summary-line-format)
852 (setq gnus-summary-line-format
853 gnus-summary-grouplens-line-format)
854 (make-local-variable 'gnus-summary-line-format-spec)
855 (setq gnus-summary-line-format-spec nil)
858 (when (and menu-bar-mode
859 (gnus-visual-p 'grouplens-menu 'menu))
860 (gnus-grouplens-make-menu-bar))
861 (unless (assq 'gnus-grouplens-mode minor-mode-alist)
862 (push '(gnus-grouplens-mode " GroupLens") minor-mode-alist))
863 (unless (assq 'gnus-grouplens-mode minor-mode-map-alist)
864 (push (cons 'gnus-grouplens-mode gnus-grouplens-mode-map)
865 minor-mode-map-alist))
866 (run-hooks 'gnus-grouplens-mode-hook))))
870 ;;; gnus-gl.el ends here