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' 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 (require 'gnus-score)
126 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
128 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
130 (defvar gnus-summary-grouplens-line-format
131 "%U\%R\%z%l%I\%(%[%4L: %-20,20n%]%) %s\n"
132 "*The line format spec in summary GroupLens mode buffers.")
134 (defvar grouplens-pseudonym ""
135 "User's pseudonym. This pseudonym is obtained during the registration process")
137 (defvar grouplens-bbb-host "grouplens.cs.umn.edu"
138 "Host where the bbbd is running" )
140 (defvar grouplens-bbb-port 9000
141 "Port where the bbbd is listening" )
143 (defvar grouplens-newsgroups
144 '("comp.groupware" "comp.human-factors" "comp.lang.c++"
145 "comp.lang.java" "comp.os.linux.admin" "comp.os.linux.advocacy"
146 "comp.os.linux.announce" "comp.os.linux.answers"
147 "comp.os.linux.development" "comp.os.linux.development.apps"
148 "comp.os.linux.development.system" "comp.os.linux.hardware"
149 "comp.os.linux.help" "comp.os.linux.m68k" "comp.os.linux.misc"
150 "comp.os.linux.networking" "comp.os.linux.setup" "comp.os.linux.x"
151 "mn.general" "rec.arts.movies" "rec.arts.movies.current-films"
152 "rec.food.recipes" "rec.humor")
153 "*Groups that are part of the GroupLens experiment.")
155 (defvar grouplens-prediction-display 'prediction-spot
157 prediction-spot -- an * corresponding to the prediction between 1 and 5,
158 confidence-interval -- a numeric confidence interval
159 prediction-bar -- |##### | the longer the bar, the better the article,
160 confidence-bar -- | ----- } the prediction is in the middle of the bar,
161 confidence-spot -- ) * | the spot gets bigger with more confidence,
162 prediction-num -- plain-old numeric value,
163 confidence-plus-minus -- prediction +/i confidence")
165 (defvar grouplens-score-offset 0
166 "Offset the prediction by this value.
167 Setting this variable to -2 would have the following effect on
176 The reason is that a user might want to do this is to combine
177 GroupLens predictions with scores calculated by other score methods.")
179 (defvar grouplens-score-scale-factor 1
180 "This variable allows the user to magnify the effect of GroupLens scores.
181 The scale factor is applied after the offset.")
183 (defvar gnus-grouplens-override-scoring 'override
184 "Tell GroupLens to override the normal Gnus scoring mechanism.
185 GroupLens scores can be combined with gnus scores in one of three ways.
186 'override -- just use grouplens predictions for grouplens groups
187 'combine -- combine grouplens scores with gnus scores
188 'separate -- treat grouplens scores completely separate from gnus")
191 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
192 ;;;; Program global variables
193 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
194 (defvar grouplens-bbb-token "0"
195 "Current session token number")
197 (defvar grouplens-bbb-process nil
198 "Process Id of current bbbd network stream process")
200 (defvar grouplens-bbb-buffer nil
201 "Buffer associated with the BBBD process")
203 (defvar grouplens-rating-alist nil
204 "Current set of message-id rating pairs")
206 (defvar grouplens-current-hashtable (make-hash-table :test 'equal :size 100))
207 ;; this seems like a pretty ugly way to get around the problem, but If
208 ;; I don't do this, then the compiler complains when I call gethash
210 (eval-when-compile (setq grouplens-current-hashtable
211 (make-hash-table :test 'equal :size 100)))
213 (defvar grouplens-current-group nil)
215 (defvar bbb-mid-list nil)
217 (defvar bbb-alist nil)
219 (defvar bbb-timeout-secs 10
220 "Number of seconds to wait for some response from the BBB.
221 If this times out we give up and assume that something has died..." )
223 (defvar grouplens-previous-article nil
224 "Message-ID of the last article read.")
226 (defvar bbb-read-point)
227 (defvar bbb-response-point)
229 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
230 ;;;; Utility Functions
231 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
232 (defun bbb-connect-to-bbbd (host port)
233 (unless grouplens-bbb-buffer
234 (setq grouplens-bbb-buffer
235 (get-buffer-create (format " *BBBD trace: %s*" host)))
237 (set-buffer grouplens-bbb-buffer)
238 (make-local-variable 'bbb-read-point)
239 (setq bbb-read-point (point-min))))
240 ;; clear the trace buffer of old output
242 (set-buffer grouplens-bbb-buffer)
244 ;; open the connection to the server
245 (setq grouplens-bbb-process nil)
247 (condition-case error
248 (setq grouplens-bbb-process
249 (open-network-stream "BBBD" grouplens-bbb-buffer host port))
250 (error (gnus-message 3 "Error: Failed to connect to BBB")
252 (and (null grouplens-bbb-process)
254 ;; (set-process-filter grouplens-bbb-process 'bbb-process-filter)
256 (set-buffer grouplens-bbb-buffer)
257 (setq bbb-read-point (point-min))
258 (or (bbb-read-response grouplens-bbb-process)
260 grouplens-bbb-process)
262 ;; (defun bbb-process-filter (process output)
264 ;; (set-buffer (bbb-process-buffer process))
265 ;; (goto-char (point-max))
268 (defun bbb-send-command (process command)
269 (goto-char (point-max))
272 (setq bbb-read-point (point))
273 (setq bbb-response-point (point))
274 (set-marker (process-mark process) (point)) ; process output also comes here
275 (process-send-string process command)
276 (process-send-string process "\r\n"))
278 (defun bbb-read-response (process) ; &optional return-response-string)
279 "This function eats the initial response of OK or ERROR from the BBB."
280 (let ((case-fold-search nil)
282 (goto-char bbb-read-point)
283 (while (and (not (search-forward "\r\n" nil t))
284 (accept-process-output process bbb-timeout-secs))
285 (goto-char bbb-read-point))
286 (setq match-end (point))
287 (goto-char bbb-read-point)
288 (setq bbb-read-point match-end)
291 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
293 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
295 "return the token number if login is successful, otherwise return nil"
297 (setq grouplens-bbb-token nil)
298 (if (not (equal grouplens-pseudonym ""))
300 (bbb-connect-to-bbbd grouplens-bbb-host grouplens-bbb-port)))
303 (set-buffer (process-buffer bbb-process))
304 (bbb-send-command bbb-process
305 (concat "login " grouplens-pseudonym))
306 (if (bbb-read-response bbb-process)
307 (setq grouplens-bbb-token (bbb-extract-token-number))
308 (gnus-message 3 "Error: GroupLens login failed")))))
309 (gnus-message 3 "Error: you must set a pseudonym"))
312 (defun bbb-extract-token-number ()
313 (let ((token-pos (search-forward "token=" nil t) ))
314 (if (looking-at "[0-9]+")
315 (buffer-substring token-pos (match-end 0)))))
317 (gnus-add-shutdown 'bbb-logout 'gnus)
320 "logout of bbb session"
322 (bbb-connect-to-bbbd grouplens-bbb-host grouplens-bbb-port)))
325 (set-buffer (process-buffer bbb-process))
326 (bbb-send-command bbb-process (concat "logout " grouplens-bbb-token))
327 (bbb-read-response bbb-process))
330 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
332 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
334 (defun bbb-build-mid-scores-alist (groupname)
335 "this function can be called as part of the function to return the
336 list of score files to use. See the gnus variable
337 gnus-score-find-score-files-function.
339 *Note:* If you want to use grouplens scores along with calculated scores,
340 you should see the offset and scale variables. At this point, I don't
341 recommend using both scores and grouplens predictions together."
342 (setq grouplens-current-group groupname)
343 (if (member groupname grouplens-newsgroups)
344 (let* ((mid-list (bbb-get-all-mids))
345 (predict-list (bbb-get-predictions mid-list groupname)))
346 (setq grouplens-previous-article nil)
347 ;; scores-alist should be a list of lists:
348 ;; ((("message-id" ("<mid1>" score1 nil s) ("<mid2> score2 nil s))))
349 ;;`((("message-id" . ,predict-list))) ; Yes, this is the return value
350 (list (list (list (append (list "message-id") predict-list)))))
353 (defun bbb-get-predictions (midlist groupname)
354 "Ask the bbb for predictions, and build up the score alist."
355 (if (or (null grouplens-bbb-token)
356 (equal grouplens-bbb-token "0"))
358 (gnus-message 3 "Error: You are not logged in to a BBB")
360 (gnus-message 5 "Fetching Predictions...")
362 (predict-command (bbb-build-predict-command midlist groupname
363 grouplens-bbb-token))
364 (bbb-process (bbb-connect-to-bbbd grouplens-bbb-host
365 grouplens-bbb-port)))
368 (set-buffer (process-buffer bbb-process))
369 (bbb-send-command bbb-process predict-command)
370 (if (bbb-read-response bbb-process)
371 (setq predict-list (bbb-get-prediction-response bbb-process))
372 (gnus-message 1 "Invalid Token, login and try again")
374 (setq bbb-alist predict-list))))
376 (defun bbb-get-all-mids ()
377 (let ((index (nth 1 (assoc "message-id" gnus-header-index)))
378 (articles gnus-newsgroup-headers)
380 (setq bbb-mid-list nil)
382 (progn (setq art (car articles)
383 this (aref art index)
384 articles (cdr articles))
385 (setq bbb-mid-list (cons this bbb-mid-list))))
388 (defun bbb-build-predict-command (mlist grpname token)
389 (let ((cmd (concat "getpredictions " token " " grpname "\r\n"))
392 (setq art (car mlist)
393 cmd (concat cmd art "\r\n")
395 (setq cmd (concat cmd ".\r\n"))
398 (defun bbb-get-prediction-response (process)
399 (let ((case-fold-search nil)
401 (goto-char bbb-read-point)
402 (while (and (not (search-forward ".\r\n" nil t))
403 (accept-process-output process bbb-timeout-secs))
404 (goto-char bbb-read-point))
405 (setq match-end (point))
406 (goto-char (+ bbb-response-point 4));; we ought to be right before OK
407 (bbb-build-response-alist)))
409 ;; build-response-alist assumes that the cursor has been positioned at
410 ;; the first line of the list of mid/rating pairs. For now we will
411 ;; use a prediction of 99 to signify no prediction. Ultimately, we
412 ;; should just ignore messages with no predictions.
413 (defun bbb-build-response-alist ()
416 (setq grouplens-current-hashtable (make-hash-table :test 'equal :size 100))
418 (cond ((looking-at "\\(<.*>\\) :nopred=")
419 (push `(,(bbb-get-mid) ,gnus-summary-default-score nil s) resp)
422 ((looking-at "\\(<.*>\\) :pred=\\([0-9]\.[0-9][0-9]\\) :conflow=\\([0-9]\.[0-9][0-9]\\) :confhigh=\\([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) (bbb-get-confl) (bbb-get-confh))
426 grouplens-current-hashtable)
429 ((looking-at "\\(<.*>\\) :pred=\\([0-9]\.[0-9][0-9]\\)")
430 (push `(,(bbb-get-mid) ,(bbb-get-pred) nil s) resp)
431 (cl-puthash (bbb-get-mid)
432 (list (bbb-get-pred) 0 0)
433 grouplens-current-hashtable)
439 ;; these two functions assume that there is an active match lying
440 ;; around. Where the first parenthesized expression is the
441 ;; message-id, and the second is the prediction. Since gnus assumes
442 ;; that scores are integer values?? we round the prediction.
443 (defun bbb-get-mid ()
444 (buffer-substring (match-beginning 1) (match-end 1)))
446 (defun bbb-get-pred ()
447 (let ((tpred (string-to-number (buffer-substring
451 (round (* grouplens-score-scale-factor (+ grouplens-score-offset tpred)))
454 (defun bbb-get-confl ()
455 (string-to-number (buffer-substring (match-beginning 3) (match-end 3))))
457 (defun bbb-get-confh ()
458 (string-to-number (buffer-substring (match-beginning 4) (match-end 4))))
460 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
461 ;;;; Prediction Display
462 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
463 (defconst grplens-rating-range 4.0)
464 (defconst grplens-maxrating 5)
465 (defconst grplens-minrating 1)
466 (defconst grplens-predstringsize 12)
468 (defvar gnus-tmp-score)
469 (defun bbb-grouplens-score (header)
470 (if (eq gnus-grouplens-override-scoring 'separate)
471 (bbb-grouplens-other-score header)
472 (let* ((rate-string (make-string 12 ? ))
473 (mid (aref header (nth 1 (assoc "message-id" gnus-header-index))))
474 (hashent (gethash mid grouplens-current-hashtable))
475 (iscore gnus-tmp-score)
476 (low (car (cdr hashent)))
477 (high (car (cdr (cdr hashent)))))
478 (aset rate-string 0 ?|)
479 (aset rate-string 11 ?|)
480 (unless (member grouplens-current-group grouplens-newsgroups)
481 (unless (equal grouplens-prediction-display 'prediction-num)
488 (if (and (bbb-valid-score iscore)
492 ((equal grouplens-prediction-display 'prediction-spot)
493 (setq rate-string (bbb-fmt-prediction-spot rate-string iscore)))
494 ;; confidence-interval
495 ((equal grouplens-prediction-display 'confidence-interval)
496 (setq rate-string (bbb-fmt-confidence-interval iscore low high)))
498 ((equal grouplens-prediction-display 'prediction-bar)
499 (setq rate-string (bbb-fmt-prediction-bar rate-string iscore)))
501 ((equal grouplens-prediction-display 'confidence-bar)
502 (setq rate-string (format "| %4.2f |" iscore)))
504 ((equal grouplens-prediction-display 'confidence-spot)
505 (setq rate-string (format "| %4.2f |" iscore)))
507 ((equal grouplens-prediction-display 'prediction-num)
508 (setq rate-string (bbb-fmt-prediction-num iscore)))
509 ;; confidence-plus-minus
510 ((equal grouplens-prediction-display 'confidence-plus-minus)
511 (setq rate-string (bbb-fmt-confidence-plus-minus iscore low high))
513 (t (gnus-message 3 "Invalid prediction display type")))
514 (aset rate-string 5 ?N) (aset rate-string 6 ?A))
518 ;; Gnus user format function that doesn't depend on
519 ;; bbb-build-mid-scores-alist being used as the score function, but is
520 ;; instead called from gnus-select-group-hook. -- LAB
521 (defun bbb-grouplens-other-score (header)
522 (if (not (member grouplens-current-group grouplens-newsgroups))
523 ;; Return an empty string
525 (let* ((rate-string (make-string 12 ? ))
526 (mid (aref header (nth 1 (assoc "message-id" gnus-header-index))))
527 (hashent (gethash mid grouplens-current-hashtable))
528 (pred (or (nth 0 hashent) 0))
529 (low (nth 1 hashent))
530 (high (nth 2 hashent)))
532 (aset rate-string 0 ?|)
533 (aset rate-string 11 ?|)
534 (unless (equal grouplens-prediction-display 'prediction-num)
539 ;; If no entry in BBB hash mark rate string as NA and return
542 (aset rate-string 5 ?N)
543 (aset rate-string 6 ?A)
546 ((equal grouplens-prediction-display 'prediction-spot)
547 (bbb-fmt-prediction-spot rate-string pred))
549 ((equal grouplens-prediction-display 'confidence-interval)
550 (bbb-fmt-confidence-interval pred low high))
552 ((equal grouplens-prediction-display 'prediction-bar)
553 (bbb-fmt-prediction-bar rate-string pred))
555 ((equal grouplens-prediction-display 'confidence-bar)
556 (format "| %4.2f |" pred))
558 ((equal grouplens-prediction-display 'confidence-spot)
559 (format "| %4.2f |" pred))
561 ((equal grouplens-prediction-display 'prediction-num)
562 (bbb-fmt-prediction-num pred))
564 ((equal grouplens-prediction-display 'confidence-plus-minus)
565 (bbb-fmt-confidence-plus-minus pred low high))
568 (gnus-message 3 "Invalid prediction display type")
569 (aset rate-string 0 ?|)
570 (aset rate-string 11 ?|)
573 (defun bbb-valid-score (score)
574 (or (equal grouplens-prediction-display 'prediction-num)
575 (and (>= score grplens-minrating)
576 (<= score grplens-maxrating))))
578 (defun bbb-requires-confidence (format-type)
579 (or (equal format-type 'confidence-plus-minus)
580 (equal format-type 'confidence-spot)
581 (equal format-type 'confidence-interval)))
583 (defun bbb-have-confidence (clow chigh)
587 (defun bbb-fmt-prediction-spot (rate-string score)
589 (round (* (/ (- score grplens-minrating) grplens-rating-range)
590 (+ (- grplens-predstringsize 4) 1.49)))
594 (defun bbb-fmt-confidence-interval (score low high)
595 (if (bbb-have-confidence low high)
596 (format "|%4.2f-%4.2f |" low high)
597 (bbb-fmt-prediction-num score)))
599 (defun bbb-fmt-confidence-plus-minus (score low high)
600 (if (bbb-have-confidence low high)
601 (format "|%3.1f+/-%4.2f|" score (/ (- high low) 2.0))
602 (bbb-fmt-prediction-num score)))
604 (defun bbb-fmt-prediction-bar (rate-string score)
606 (step (/ grplens-rating-range (- grplens-predstringsize 4)))
607 (half-step (/ step 2))
608 (loc (- grplens-minrating half-step)))
609 (while (< i (- grplens-predstringsize 2))
611 (aset rate-string i ?#)
612 (aset rate-string i ? ))
614 (setq loc (+ loc step)))
618 (defun bbb-fmt-prediction-num (score)
619 (format "| %4.2f |" score))
621 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
623 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
625 ;; The message-id for the current article can be found in
626 ;; (aref gnus-current-headers (nth 1 (assoc "message-id" gnus-header-index)))
628 (defun bbb-put-ratings ()
629 (if (and grouplens-rating-alist
630 (member gnus-newsgroup-name grouplens-newsgroups))
631 (let ((bbb-process (bbb-connect-to-bbbd grouplens-bbb-host
633 (rate-command (bbb-build-rate-command grouplens-rating-alist)))
636 (set-buffer (process-buffer bbb-process))
637 (gnus-message 5 "Sending Ratings...")
638 (bbb-send-command bbb-process rate-command)
639 (if (bbb-read-response bbb-process)
640 (setq grouplens-rating-alist nil)
642 "Token timed out: call bbb-login and quit again")
644 (gnus-message 5 "Sending Ratings...Done"))
645 (gnus-message 3 "No BBB connection")))
646 (setq grouplens-rating-alist nil)))
648 (defun bbb-build-rate-command (rate-alist)
650 (cmd (concat "putratings " grouplens-bbb-token
651 " " grouplens-current-group " \r\n")))
653 (setq this (car rate-alist)
654 cmd (concat cmd (car this) " :rating=" (cadr this) ".00"
655 " :time=" (cddr this) "\r\n")
656 rate-alist (cdr rate-alist)))
657 (concat cmd ".\r\n")))
659 ;; Interactive rating functions.
660 (defun bbb-summary-rate-article (rating &optional midin)
661 (interactive "nRating: ")
662 (when (member gnus-newsgroup-name grouplens-newsgroups)
663 (let ((mid (or midin (bbb-get-current-id))))
665 (>= rating grplens-minrating)
666 (<= rating grplens-maxrating)
668 (let ((oldrating (assoc mid grouplens-rating-alist)))
670 (setcdr oldrating (cons rating 0))
671 (push `(,mid . (,rating . 0)) grouplens-rating-alist))
672 (gnus-summary-mark-article nil (int-to-string rating)))
673 (gnus-message 3 "Invalid rating")))))
675 (defun grouplens-next-unread-article (rating)
676 "Select unread article after current one."
678 (if rating (bbb-summary-rate-article rating))
679 (gnus-summary-next-unread-article))
681 (defun grouplens-best-unread-article (rating)
682 "Select unread article after current one."
684 (if rating (bbb-summary-rate-article rating))
685 (gnus-summary-best-unread-article))
687 (defun grouplens-summary-catchup-and-exit (rating)
688 "Mark all articles not marked as unread in this newsgroup as read,
689 then exit. If prefix argument ALL is non-nil, all articles are
693 (bbb-summary-rate-article rating))
695 (gnus-summary-catchup-and-exit)
696 (gnus-summary-catchup-and-exit rating)))
698 (defun grouplens-score-thread (score)
699 "Raise the score of the articles in the current thread with SCORE."
700 (interactive "nRating: ")
703 (let ((articles (gnus-summary-articles-in-thread)))
705 (gnus-summary-goto-subject (car articles))
706 (gnus-set-global-variables)
707 (bbb-summary-rate-article score
709 (gnus-summary-article-header
711 (setq articles (cdr articles))))
713 (let ((gnus-summary-check-current t))
714 (or (zerop (gnus-summary-next-subject 1 t))
716 (gnus-summary-recenter)
717 (gnus-summary-position-point)
718 (gnus-set-mode-line 'summary))
721 (defun bbb-get-current-id ()
722 (if gnus-current-headers
723 (aref gnus-current-headers
724 (nth 1 (assoc "message-id" gnus-header-index)))
725 (gnus-message 3 "You must select an article before you rate it")))
727 (defun bbb-grouplens-group-p (group)
728 "Say whether GROUP is a GroupLens group."
729 (if (member group grouplens-newsgroups) " (GroupLens Enhanced)" ""))
731 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
732 ;; TIME SPENT READING
733 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
734 (defvar grouplens-current-starting-time nil)
736 (defun grouplens-start-timer ()
737 (setq grouplens-current-starting-time (current-time)))
739 (defun grouplens-elapsed-time ()
740 (let ((et (bbb-time-float (current-time))))
741 (- et (bbb-time-float grouplens-current-starting-time))))
743 (defun bbb-time-float (timeval)
744 (+ (* (car timeval) 65536)
747 (defun grouplens-do-time ()
748 (when (member gnus-newsgroup-name grouplens-newsgroups)
749 (when grouplens-previous-article
750 (let ((elapsed-time (grouplens-elapsed-time))
751 (oldrating (assoc grouplens-previous-article
752 grouplens-rating-alist)))
754 (push `(,grouplens-previous-article . (0 . ,elapsed-time))
755 grouplens-rating-alist)
756 (setcdr oldrating (cons (cadr oldrating) elapsed-time)))))
757 (grouplens-start-timer)
758 (setq grouplens-previous-article (bbb-get-current-id))))
760 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
762 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
764 (defconst gnus-gl-version "gnus-gl.el 2.12")
765 (defconst gnus-gl-maintainer-address "grouplens-bug@cs.umn.edu")
766 (defun gnus-gl-submit-bug-report ()
767 "Submit via mail a bug report on gnus-gl"
770 (reporter-submit-bug-report gnus-gl-maintainer-address
771 (concat "gnus-gl.el " gnus-gl-version)
772 (list 'grouplens-pseudonym
775 'grouplens-newsgroups
777 'grouplens-bbb-process
778 'grouplens-current-group
779 'grouplens-previous-article
785 (defun gnus-gl-get-trace ()
786 "Insert the contents of the BBBD trace buffer"
787 (if grouplens-bbb-buffer (insert-buffer grouplens-bbb-buffer)))
790 ;;; Additions to make gnus-grouplens-mode Warning Warning!!
791 ;;; This version of the gnus-grouplens-mode does
792 ;;; not work with gnus-5.x. The "old" way of
793 ;;; setting up GroupLens still works however.
795 (defvar gnus-grouplens-mode nil
796 "Minor mode for providing a GroupLens interface in Gnus summary buffers.")
798 (defvar gnus-grouplens-mode-map nil)
800 (unless gnus-grouplens-mode-map
801 (setq gnus-grouplens-mode-map (make-keymap))
803 gnus-grouplens-mode-map
804 "n" grouplens-next-unread-article
805 "r" bbb-summary-rate-article
806 "k" grouplens-score-thread
807 "c" grouplens-summary-catchup-and-exit
808 "," grouplens-best-unread-article))
810 (defun gnus-grouplens-make-menu-bar ()
811 (unless (boundp 'gnus-grouplens-menu)
813 gnus-grouplens-menu gnus-grouplens-mode-map ""
815 ["Login" bbb-login t]
816 ["Rate" bbb-summary-rate-article t]
817 ["Next article" grouplens-next-unread-article t]
818 ["Best article" grouplens-best-unread-article t]
819 ["Raise thread" grouplens-score-thread t]
820 ["Report bugs" gnus-gl-submit-bug-report t]))))
822 (defun gnus-grouplens-mode (&optional arg)
823 "Minor mode for providing a GroupLens interface in Gnus summary buffers."
825 (when (and (eq major-mode 'gnus-summary-mode)
826 (member gnus-newsgroup-name grouplens-newsgroups))
827 (make-local-variable 'gnus-grouplens-mode)
828 (setq gnus-grouplens-mode
829 (if (null arg) (not gnus-grouplens-mode)
830 (> (prefix-numeric-value arg) 0)))
831 (when gnus-grouplens-mode
832 (gnus-make-local-hook 'gnus-select-article-hook)
833 (gnus-add-hook 'gnus-select-article-hook 'grouplens-do-time nil 'local)
834 (gnus-make-local-hook 'gnus-exit-group-hook)
835 (gnus-add-hook 'gnus-exit-group-hook 'bbb-put-ratings nil 'local)
836 (make-local-variable 'gnus-score-find-score-files-function)
837 (cond ((eq gnus-grouplens-override-scoring 'combine)
838 ;; either add bbb-buld-mid-scores-alist to a list
840 (if (listp gnus-score-find-score-files-function)
841 (setq gnus-score-find-score-files-function
842 (append 'bbb-build-mid-scores-alist
843 gnus-score-find-score-files-function ))
844 (setq gnus-score-find-score-files-function
845 (list gnus-score-find-score-files-function
846 'bbb-build-mid-scores-alist))))
847 ;; leave the gnus-score-find-score-files variable alone
848 ((eq gnus-grouplens-override-scoring 'separate)
849 (add-hook 'gnus-select-group-hook
851 (bbb-build-mid-scores-alist gnus-newsgroup-name))))
852 ;; default is to override
853 (t (setq gnus-score-find-score-files-function
854 'bbb-build-mid-scores-alist)))
856 ;; Change how summary lines look
857 (make-local-variable 'gnus-summary-line-format)
858 (make-local-variable 'gnus-summary-line-format-spec)
859 (setq gnus-summary-line-format gnus-summary-grouplens-line-format)
860 (setq gnus-summary-line-format-spec nil)
861 (gnus-update-format-specifications nil 'summary)
862 (gnus-update-summary-mark-positions)
865 (when (and menu-bar-mode
866 (gnus-visual-p 'grouplens-menu 'menu))
867 (gnus-grouplens-make-menu-bar))
868 (unless (assq 'gnus-grouplens-mode minor-mode-alist)
869 (push '(gnus-grouplens-mode " GroupLens") minor-mode-alist))
870 (unless (assq 'gnus-grouplens-mode minor-mode-map-alist)
871 (push (cons 'gnus-grouplens-mode gnus-grouplens-mode-map)
872 minor-mode-map-alist))
873 (run-hooks 'gnus-grouplens-mode-hook))))
877 ;;; gnus-gl.el ends here