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)
123 (eval-and-compile (require 'cl))
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 gnus-summary-grouplens-lab-line-format
134 "%U%R%z%uL%I%(%[%4L: %-20,20n%]%) %s\n"
135 "*The line format spec in summary GroupLens mode buffers.")
137 (defvar grouplens-pseudonym ""
138 "User's pseudonym. This pseudonym is obtained during the registration process")
140 (defvar grouplens-bbb-host "grouplens.cs.umn.edu"
141 "Host where the bbbd is running" )
143 (defvar grouplens-bbb-port 9000
144 "Port where the bbbd is listening" )
146 (defvar grouplens-newsgroups
147 '("comp.lang.c++" "rec.humor" "rec.food.recipes" "comp.groupware"
148 "mn.general" "rec.arts.movies" "rec.arts.movies.current-films"
149 "comp.lang.java" "comp.os.linux.announce" "comp.os.linux.misc"
150 "comp.os.linux.development.apps" "comp.os.linux.development.system")
151 "*Groups that are part of the GroupLens experiment.")
153 (defvar grouplens-prediction-display 'prediction-spot
155 prediction-spot -- an * corresponding to the prediction between 1 and 5,
156 confidence-interval -- a numeric confidence interval
157 prediction-bar -- |##### | the longer the bar, the better the article,
158 confidence-bar -- | ----- } the prediction is in the middle of the bar,
159 confidence-spot -- ) * | the spot gets bigger with more confidence,
160 prediction-num -- plain-old numeric value,
161 confidence-plus-minus -- prediction +/i confidence")
163 (defvar grouplens-score-offset 0
164 "Offset the prediction by this value.
165 Setting this variable to -2 would have the following effect on grouplens
173 the reason a user might want to do this is to combine grouplens
174 predictions with scores calculated by other score methods")
176 (defvar grouplens-score-scale-factor 1
177 "This variable allow sthe user to magify the effect of grouplens scores.
178 The scale factor is applied after the offset.")
180 (defvar gnus-grouplens-override-scoring t
181 "Tell Grouplens to override the normal Gnus scoring mechanism.
182 If this variable is non-nill than Grouplens will completely override
183 the normal scoring mechanism of Gnus. When nil, Grouplens will not
184 override the normal scoring mechanism so both can be used at once.")
186 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
187 ;;;; Program global variables
188 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
189 (defvar grouplens-bbb-token "0"
190 "Current session token number")
192 (defvar grouplens-bbb-process nil
193 "Process Id of current bbbd network stream process")
195 (defvar grouplens-bbb-buffer nil
196 "Buffer associated with the BBBD process")
198 (defvar grouplens-rating-alist nil
199 "Current set of message-id rating pairs")
201 (defvar grouplens-current-hashtable (make-hash-table :test 'equal :size 100))
202 ;; this seems like a pretty ugly way to get around the problem, but If
203 ;; I don't do this, then the compiler complains when I call gethash
205 (eval-when-compile (setq grouplens-current-hashtable
206 (make-hash-table :test 'equal :size 100)))
208 (defvar grouplens-current-group nil)
210 (defvar bbb-mid-list nil)
212 (defvar bbb-alist nil)
214 (defvar bbb-timeout-secs 10
215 "Number of seconds to wait for some response from the BBB before
216 we give up and assume that something has died..." )
218 (defvar grouplens-previous-article nil
219 "message-id of the last article read")
221 (defvar bbb-read-point)
222 (defvar bbb-response-point)
224 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
225 ;;;; Utility Functions
226 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
227 (defun bbb-connect-to-bbbd (host port)
228 (unless grouplens-bbb-buffer
229 (setq grouplens-bbb-buffer
230 (get-buffer-create (format " *BBBD trace: %s*" host)))
232 (set-buffer grouplens-bbb-buffer)
233 (make-local-variable 'bbb-read-point)
234 (setq bbb-read-point (point-min))))
235 ;; clear the trace buffer of old output
237 (set-buffer grouplens-bbb-buffer)
239 ;; open the connection to the server
240 (setq grouplens-bbb-process nil)
242 (condition-case error
243 (setq grouplens-bbb-process
244 (open-network-stream "BBBD" grouplens-bbb-buffer host port))
245 (error (gnus-message 3 "Error: Failed to connect to BBB")
247 (and (null grouplens-bbb-process)
249 ;; (set-process-filter grouplens-bbb-process 'bbb-process-filter)
251 (set-buffer grouplens-bbb-buffer)
252 (setq bbb-read-point (point-min))
253 (or (bbb-read-response grouplens-bbb-process)
255 grouplens-bbb-process)
257 ;; (defun bbb-process-filter (process output)
259 ;; (set-buffer (bbb-process-buffer process))
260 ;; (goto-char (point-max))
263 (defun bbb-send-command (process command)
264 (goto-char (point-max))
267 (setq bbb-read-point (point))
268 (setq bbb-response-point (point))
269 (set-marker (process-mark process) (point)) ; process output also comes here
270 (process-send-string process command)
271 (process-send-string process "\r\n"))
273 (defun bbb-read-response (process) ; &optional return-response-string)
274 "This function eats the initial response of OK or ERROR from the BBB."
275 (let ((case-fold-search nil)
277 (goto-char bbb-read-point)
278 (while (and (not (search-forward "\r\n" nil t))
279 (accept-process-output process bbb-timeout-secs))
280 (goto-char bbb-read-point))
281 (setq match-end (point))
282 (goto-char bbb-read-point)
283 (setq bbb-read-point match-end)
286 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
288 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
290 "return the token number if login is successful, otherwise return nil"
292 (setq grouplens-bbb-token nil)
293 (if (not (equal grouplens-pseudonym ""))
295 (bbb-connect-to-bbbd grouplens-bbb-host grouplens-bbb-port)))
298 (set-buffer (process-buffer bbb-process))
299 (bbb-send-command bbb-process
300 (concat "login " grouplens-pseudonym))
301 (if (bbb-read-response bbb-process)
302 (setq grouplens-bbb-token (bbb-extract-token-number))
303 (gnus-message 3 "Error: Grouplens login failed")))))
304 (gnus-message 3 "Error: you must set a pseudonym"))
307 (defun bbb-extract-token-number ()
308 (let ((token-pos (search-forward "token=" nil t) ))
309 (if (looking-at "[0-9]+")
310 (buffer-substring token-pos (match-end 0)))))
312 (gnus-add-shutdown 'bbb-logout 'gnus)
315 "logout of bbb session"
317 (bbb-connect-to-bbbd grouplens-bbb-host grouplens-bbb-port)))
320 (set-buffer (process-buffer bbb-process))
321 (bbb-send-command bbb-process (concat "logout " grouplens-bbb-token))
322 (bbb-read-response bbb-process))
325 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
327 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
329 (defun bbb-build-mid-scores-alist (groupname)
330 "this function can be called as part of the function to return the
331 list of score files to use. See the gnus variable
332 gnus-score-find-score-files-function.
334 *Note:* If you want to use grouplens scores along with calculated scores,
335 you should see the offset and scale variables. At this point, I don't
336 recommend using both scores and grouplens predictions together."
337 (setq grouplens-current-group groupname)
338 (if (member groupname grouplens-newsgroups)
339 (let* ((mid-list (bbb-get-all-mids))
340 (predict-list (bbb-get-predictions mid-list groupname)))
341 (setq grouplens-previous-article nil)
342 ;; scores-alist should be a list of lists:
343 ;; ((("message-id" ("<mid1>" score1 nil s) ("<mid2> score2 nil s))))
344 ;;`((("message-id" . ,predict-list))) ; Yes, this is the return value
345 (list (list (list (append (list "message-id") predict-list)))))
348 (defun bbb-get-predictions (midlist groupname)
349 "Ask the bbb for predictions, and build up the score alist."
350 (if (or (null grouplens-bbb-token)
351 (equal grouplens-bbb-token "0"))
352 (gnus-message 3 "Error: You are not logged in to a BBB")
353 (gnus-message 5 "Fetching Predictions...")
355 (predict-command (build-predict-command midlist groupname
356 grouplens-bbb-token))
357 (bbb-process (bbb-connect-to-bbbd grouplens-bbb-host
358 grouplens-bbb-port)))
361 (set-buffer (process-buffer bbb-process))
362 (bbb-send-command bbb-process predict-command)
363 (if (bbb-read-response bbb-process)
364 (setq predict-list (bbb-get-prediction-response bbb-process))
365 (gnus-message 1 "Invalid Token, login and try again")
367 (setq bbb-alist predict-list))))
369 (defun bbb-get-all-mids ()
370 (let ((index (nth 1 (assoc "message-id" gnus-header-index)))
371 (articles gnus-newsgroup-headers)
373 (setq bbb-mid-list nil)
375 (progn (setq art (car articles)
376 this (aref art index)
377 articles (cdr articles))
378 (setq bbb-mid-list (cons this bbb-mid-list))))
381 (defun build-predict-command (mlist grpname token)
382 (let ((cmd (concat "getpredictions " token " " grpname "\r\n"))
385 (setq art (car mlist)
386 cmd (concat cmd art "\r\n")
388 (setq cmd (concat cmd ".\r\n"))
391 (defun bbb-get-prediction-response (process)
392 (let ((case-fold-search nil)
394 (goto-char bbb-read-point)
395 (while (and (not (search-forward ".\r\n" nil t))
396 (accept-process-output process bbb-timeout-secs))
397 (goto-char bbb-read-point))
398 (setq match-end (point))
399 (goto-char (+ bbb-response-point 4)) ;; we ought to be right before OK
400 (build-response-alist)))
402 ;; build-response-alist assumes that the cursor has been positioned at
403 ;; the first line of the list of mid/rating pairs. For now we will
404 ;; use a prediction of 99 to signify no prediction. Ultimately, we
405 ;; should just ignore messages with no predictions.
406 (defun build-response-alist ()
409 (setq grouplens-current-hashtable (make-hash-table :test 'equal :size 100))
411 (cond ((looking-at "\\(<.*>\\) :nopred=")
412 (push `(,(bbb-get-mid) ,gnus-summary-default-score nil s) resp)
415 ((looking-at "\\(<.*>\\) :pred=\\([0-9]\.[0-9][0-9]\\) :conflow=\\([0-9]\.[0-9][0-9]\\) :confhigh=\\([0-9]\.[0-9][0-9]\\)")
416 (push `(,(bbb-get-mid) ,(bbb-get-pred) nil s) resp)
417 (cl-puthash (bbb-get-mid)
418 (list (bbb-get-pred) (bbb-get-confl) (bbb-get-confh))
419 grouplens-current-hashtable)
422 ((looking-at "\\(<.*>\\) :pred=\\([0-9]\.[0-9][0-9]\\)")
423 (push `(,(bbb-get-mid) ,(bbb-get-pred) nil s) resp)
424 (cl-puthash (bbb-get-mid)
425 (list (bbb-get-pred) 0 0)
426 grouplens-current-hashtable)
432 ;; these two functions assume that there is an active match lying
433 ;; around. Where the first parenthesized expression is the
434 ;; message-id, and the second is the prediction. Since gnus assumes
435 ;; that scores are integer values?? we round the prediction.
436 (defun bbb-get-mid ()
437 (buffer-substring (match-beginning 1) (match-end 1)))
439 (defun bbb-get-pred ()
440 (let ((tpred (round (string-to-int (buffer-substring
444 (* grouplens-score-scale-factor (+ grouplens-score-offset tpred))
447 (defun bbb-get-confl ()
448 (string-to-number (buffer-substring (match-beginning 3) (match-end 3))))
450 (defun bbb-get-confh ()
451 (string-to-number (buffer-substring (match-beginning 4) (match-end 4))))
453 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
454 ;;;; Prediction Display
455 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
456 (defconst grplens-rating-range 4.0)
457 (defconst grplens-maxrating 5)
458 (defconst grplens-minrating 1)
459 (defconst grplens-predstringsize 12)
461 (defvar gnus-tmp-score)
462 (defun bbb-grouplens-score (header)
463 (let* ((rate-string (make-string 12 ? ))
464 (mid (aref header (nth 1 (assoc "message-id" gnus-header-index))))
465 (hashent (gethash mid grouplens-current-hashtable))
466 (iscore gnus-tmp-score)
467 (low (car (cdr hashent)))
468 (high (car (cdr (cdr hashent)))))
469 (aset rate-string 0 ?|)
470 (aset rate-string 11 ?|)
471 (unless (member grouplens-current-group grouplens-newsgroups)
472 (unless (equal grouplens-prediction-display 'prediction-num)
479 (if (and (bbb-valid-score iscore)
483 ((equal grouplens-prediction-display 'prediction-spot)
484 (setq rate-string (bbb-fmt-prediction-spot rate-string iscore)))
485 ;; confidence-interval
486 ((equal grouplens-prediction-display 'confidence-interval)
487 (setq rate-string (bbb-fmt-confidence-interval iscore low high)))
489 ((equal grouplens-prediction-display 'prediction-bar)
490 (setq rate-string (bbb-fmt-prediction-bar rate-string iscore)))
492 ((equal grouplens-prediction-display 'confidence-bar)
493 (setq rate-string (format "| %4.2f |" iscore)))
495 ((equal grouplens-prediction-display 'confidence-spot)
496 (setq rate-string (format "| %4.2f |" iscore)))
498 ((equal grouplens-prediction-display 'prediction-num)
499 (setq rate-string (bbb-fmt-prediction-num iscore)))
500 ;; confidence-plus-minus
501 ((equal grouplens-prediction-display 'confidence-plus-minus)
502 (setq rate-string (bbb-fmt-confidence-plus-minus iscore low high))
504 (t (gnus-message 3 "Invalid prediction display type")))
505 (aset rate-string 5 ?N) (aset rate-string 6 ?A))
509 ;; Gnus user format function that doesn't depend on
510 ;; bbb-build-mid-scores-alist being used as the score function, but is
511 ;; instead called from gnus-select-group-hook. -- LAB
512 (defun gnus-user-format-function-L (header)
513 (if (not (member grouplens-current-group grouplens-newsgroups))
514 ;; Return an empty string
516 (let* ((rate-string (make-string 12 ? ))
517 (mid (aref header (nth 1 (assoc "message-id" gnus-header-index))))
518 (hashent (gethash mid grouplens-current-hashtable))
519 (pred (or (nth 0 hashent) 0))
520 (low (nth 1 hashent))
521 (high (nth 2 hashent)))
523 (aset rate-string 0 ?|)
524 (aset rate-string 11 ?|)
525 (unless (equal grouplens-prediction-display 'prediction-num)
530 ;; If no entry in BBB hash mark rate string as NA and return
533 (aset rate-string 5 ?N)
534 (aset rate-string 6 ?A)
537 ((equal grouplens-prediction-display 'prediction-spot)
538 (bbb-fmt-prediction-spot rate-string pred))
540 ((equal grouplens-prediction-display 'confidence-interval)
541 (bbb-fmt-confidence-interval pred low high))
543 ((equal grouplens-prediction-display 'prediction-bar)
544 (bbb-fmt-prediction-bar rate-string pred))
546 ((equal grouplens-prediction-display 'confidence-bar)
547 (format "| %4.2f |" pred))
549 ((equal grouplens-prediction-display 'confidence-spot)
550 (format "| %4.2f |" pred))
552 ((equal grouplens-prediction-display 'prediction-num)
553 (bbb-fmt-prediction-num pred))
555 ((equal grouplens-prediction-display 'confidence-plus-minus)
556 (bbb-fmt-confidence-plus-minus pred low high))
559 (gnus-message 3 "Invalid prediction display type")
560 (aset rate-string 0 ?|)
561 (aset rate-string 11 ?|)
564 (defun bbb-valid-score (score)
565 (or (equal grouplens-prediction-display 'prediction-num)
566 (and (>= score grplens-minrating)
567 (<= score grplens-maxrating))))
569 (defun bbb-requires-confidence (format-type)
570 (or (equal format-type 'confidence-plus-minus)
571 (equal format-type 'confidence-spot)
572 (equal format-type 'confidence-interval)))
574 (defun bbb-have-confidence (clow chigh)
578 (defun bbb-fmt-prediction-spot (rate-string score)
580 (round (* (/ (- score grplens-minrating) grplens-rating-range)
581 (+ (- grplens-predstringsize 4) 1.49)))
585 (defun bbb-fmt-confidence-interval (score low high)
586 (if (bbb-have-confidence low high)
587 (format "|%4.2f-%4.2f |" low high)
588 (bbb-fmt-prediction-num score)))
590 (defun bbb-fmt-confidence-plus-minus (score low high)
591 (if (bbb-have-confidence low high)
592 (format "|%3.1f+/-%4.2f|" score (/ (- high low) 2.0))
593 (bbb-fmt-prediction-num score)))
595 (defun bbb-fmt-prediction-bar (rate-string score)
597 (step (/ grplens-rating-range (- grplens-predstringsize 4)))
598 (half-step (/ step 2))
599 (loc (- grplens-minrating half-step)))
600 (while (< i (- grplens-predstringsize 2))
602 (aset rate-string i ?#)
603 (aset rate-string i ? ))
605 (setq loc (+ loc step)))
609 (defun bbb-fmt-prediction-num (score)
610 (format "| %4.2f |" score))
612 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
614 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
616 ;; The message-id for the current article can be found in
617 ;; (aref gnus-current-headers (nth 1 (assoc "message-id" gnus-header-index)))
619 (defun bbb-put-ratings ()
620 (if (and grouplens-rating-alist
621 (member gnus-newsgroup-name grouplens-newsgroups))
622 (let ((bbb-process (bbb-connect-to-bbbd grouplens-bbb-host
624 (rate-command (build-rate-command grouplens-rating-alist)))
627 (set-buffer (process-buffer bbb-process))
628 (gnus-message 5 "Sending Ratings...")
629 (bbb-send-command bbb-process rate-command)
630 (if (bbb-read-response bbb-process)
631 (setq grouplens-rating-alist nil)
633 "Token timed out: call bbb-login and quit again")
635 (gnus-message 5 "Sending Ratings...Done"))
636 (gnus-message 3 "No BBB connection")))
637 (setq grouplens-rating-alist nil)))
639 (defun build-rate-command (rate-alist)
641 (cmd (concat "putratings " grouplens-bbb-token
642 " " grouplens-current-group " \r\n")))
644 (setq this (car rate-alist)
645 cmd (concat cmd (car this) " :rating=" (cadr this) ".00"
646 " :time=" (cddr this) "\r\n")
647 rate-alist (cdr rate-alist)))
648 (concat cmd ".\r\n")))
650 ;; Interactive rating functions.
651 (defun bbb-summary-rate-article (rating &optional midin)
652 (interactive "nRating: ")
653 (when (member gnus-newsgroup-name grouplens-newsgroups)
654 (let ((mid (or midin (bbb-get-current-id))))
656 (>= rating grplens-minrating)
657 (<= rating grplens-maxrating)
659 (let ((oldrating (assoc mid grouplens-rating-alist)))
661 (setcdr oldrating (cons rating 0))
662 (push `(,mid . (,rating . 0)) grouplens-rating-alist))
663 (gnus-summary-mark-article nil (int-to-string rating)))
664 (gnus-message 3 "Invalid rating")))))
666 (defun grouplens-next-unread-article (rating)
667 "Select unread article after current one."
669 (if rating (bbb-summary-rate-article rating))
670 (gnus-summary-next-unread-article))
672 (defun grouplens-best-unread-article (rating)
673 "Select unread article after current one."
675 (if rating (bbb-summary-rate-article rating))
676 (gnus-summary-best-unread-article))
678 (defun grouplens-summary-catchup-and-exit (rating)
679 "Mark all articles not marked as unread in this newsgroup as read,
680 then exit. If prefix argument ALL is non-nil, all articles are
684 (bbb-summary-rate-article rating))
686 (gnus-summary-catchup-and-exit)
687 (gnus-summary-catchup-and-exit rating)))
689 (defun grouplens-score-thread (score)
690 "Raise the score of the articles in the current thread with SCORE."
691 (interactive "nRating: ")
694 (let ((articles (gnus-summary-articles-in-thread)))
696 (gnus-summary-goto-subject (car articles))
697 (gnus-set-global-variables)
698 (bbb-summary-rate-article score
700 (gnus-summary-article-header
702 (setq articles (cdr articles))))
704 (let ((gnus-summary-check-current t))
705 (or (zerop (gnus-summary-next-subject 1 t))
707 (gnus-summary-recenter)
708 (gnus-summary-position-point)
709 (gnus-set-mode-line 'summary))
712 (defun bbb-get-current-id ()
713 (if gnus-current-headers
714 (aref gnus-current-headers
715 (nth 1 (assoc "message-id" gnus-header-index)))
716 (gnus-message 3 "You must select an article before you rate it")))
718 (defun bbb-grouplens-group-p (group)
719 "Say whether GROUP is a GroupLens group."
720 (if (member group grouplens-newsgroups) " (GroupLens Enhanced)" ""))
722 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
723 ;; TIME SPENT READING
724 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
725 (defvar grouplens-current-starting-time nil)
727 (defun grouplens-start-timer ()
728 (setq grouplens-current-starting-time (current-time)))
730 (defun grouplens-elapsed-time ()
731 (let ((et (bbb-time-float (current-time))))
732 (- et (bbb-time-float grouplens-current-starting-time))))
734 (defun bbb-time-float (timeval)
735 (+ (* (car timeval) 65536)
738 (defun grouplens-do-time ()
739 (when (member gnus-newsgroup-name grouplens-newsgroups)
740 (when grouplens-previous-article
741 (let ((elapsed-time (grouplens-elapsed-time))
742 (oldrating (assoc grouplens-previous-article
743 grouplens-rating-alist)))
745 (push `(,grouplens-previous-article . (0 . ,elapsed-time))
746 grouplens-rating-alist)
747 (setcdr oldrating (cons (cadr oldrating) elapsed-time)))))
748 (grouplens-start-timer)
749 (setq grouplens-previous-article (bbb-get-current-id))))
751 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
753 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
755 (defconst gnus-gl-version "gnus-gl.el 2.11")
756 (defconst gnus-gl-maintainer-address "grouplens-bug@cs.umn.edu")
757 (defun gnus-gl-submit-bug-report ()
758 "Submit via mail a bug report on gnus-gl"
761 (reporter-submit-bug-report gnus-gl-maintainer-address
762 (concat "gnus-gl.el " gnus-gl-version)
763 (list 'grouplens-pseudonym
766 'grouplens-newsgroups
768 'grouplens-bbb-process
769 'grouplens-current-group
770 'grouplens-previous-article
776 (defun gnus-gl-get-trace ()
777 "Insert the contents of the BBBD trace buffer"
778 (if grouplens-bbb-buffer (insert-buffer grouplens-bbb-buffer)))
781 ;;; Additions to make gnus-grouplens-mode Warning Warning!!
782 ;;; This version of the gnus-grouplens-mode does
783 ;;; not work with gnus-5.x. The "old" way of
784 ;;; setting up GroupLens still works however.
786 (defvar gnus-grouplens-mode nil
787 "Minor mode for providing a GroupLens interface in Gnus summary buffers.")
789 (defvar gnus-grouplens-mode-map nil)
791 (unless gnus-grouplens-mode-map
792 (setq gnus-grouplens-mode-map (make-keymap))
794 gnus-grouplens-mode-map
795 "n" grouplens-next-unread-article
796 "r" bbb-summary-rate-article
797 "k" grouplens-score-thread
798 "c" grouplens-summary-catchup-and-exit
799 "," grouplens-best-unread-article))
801 (defun gnus-grouplens-make-menu-bar ()
802 (unless (boundp 'gnus-grouplens-menu)
804 gnus-grouplens-menu gnus-grouplens-mode-map ""
806 ["Login" bbb-login t]
807 ["Rate" bbb-summary-rate-article t]
808 ["Next article" grouplens-next-unread-article t]
809 ["Best article" grouplens-best-unread-article t]
810 ["Raise thread" grouplens-score-thread t]
811 ["Report bugs" gnus-gl-submit-bug-report t]))))
813 (defun gnus-grouplens-mode (&optional arg)
814 "Minor mode for providing a GroupLens interface in Gnus summary buffers."
816 (when (and (eq major-mode 'gnus-summary-mode)
817 (member gnus-newsgroup-name grouplens-newsgroups))
818 (make-local-variable 'gnus-grouplens-mode)
819 (setq gnus-grouplens-mode
820 (if (null arg) (not gnus-grouplens-mode)
821 (> (prefix-numeric-value arg) 0)))
822 (when gnus-grouplens-mode
823 (if (not (fboundp 'make-local-hook))
824 (add-hook 'gnus-select-article-hook 'grouplens-do-time)
825 (make-local-hook 'gnus-select-article-hook)
826 (add-hook 'gnus-select-article-hook 'grouplens-do-time nil 'local))
827 (if (not (fboundp 'make-local-hook))
828 (add-hook 'gnus-exit-group-hook 'bbb-put-ratings)
829 (make-local-hook 'gnus-exit-group-hook)
830 (add-hook 'gnus-exit-group-hook 'bbb-put-ratings nil 'local))
831 (make-local-variable 'gnus-score-find-score-files-function)
832 (if gnus-grouplens-override-scoring
833 (setq gnus-score-find-score-files-function
834 'bbb-build-mid-scores-alist)
835 (add-hook 'gnus-select-group-hook
837 (bbb-build-mid-scores-alist gnus-newsgroup-name))))
838 (make-local-variable 'gnus-summary-line-format)
839 (if (null gnus-grouplens-override-scoring)
841 (setq gnus-summary-line-format gnus-summary-grouplens-lab-line-format))
842 (make-local-variable 'gnus-summary-line-format-spec)
845 (when (and menu-bar-mode
846 (gnus-visual-p 'grouplens-menu 'menu))
847 (gnus-grouplens-make-menu-bar))
848 (unless (assq 'gnus-grouplens-mode minor-mode-alist)
849 (push '(gnus-grouplens-mode " GroupLens") minor-mode-alist))
850 (unless (assq 'gnus-grouplens-mode minor-mode-map-alist)
851 (push (cons 'gnus-grouplens-mode gnus-grouplens-mode-map)
852 minor-mode-map-alist))
853 (run-hooks 'gnus-grouplens-mode-hook))))
857 ;;; gnus-gl.el ends here