1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
;;; gnus-logic.el --- advanced scoring code for Gnus
;; Copyright (C) 1996-2012 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(eval-when-compile (require 'cl))
(require 'gnus)
(require 'gnus-score)
(require 'gnus-util)
;;; Internal variables.
(defvar gnus-advanced-headers nil)
;; To avoid having 8-bit characters in the source file.
(defvar gnus-advanced-not (intern (format "%c" 172)))
(defconst gnus-advanced-index
;; Name to index alist.
'(("number" 0 gnus-advanced-integer)
("subject" 1 gnus-advanced-string)
("from" 2 gnus-advanced-string)
("date" 3 gnus-advanced-date)
("message-id" 4 gnus-advanced-string)
("references" 5 gnus-advanced-string)
("chars" 6 gnus-advanced-integer)
("lines" 7 gnus-advanced-integer)
("xref" 8 gnus-advanced-string)
("head" nil gnus-advanced-body)
("body" nil gnus-advanced-body)
("all" nil gnus-advanced-body)))
(autoload 'parse-time-string "parse-time")
(defun gnus-score-advanced (rule &optional trace)
"Apply advanced scoring RULE to all the articles in the current group."
(let (new-score score multiple)
(dolist (gnus-advanced-headers gnus-newsgroup-headers)
(when (setq multiple (gnus-advanced-score-rule (car rule)))
(setq new-score (or (nth 1 rule)
gnus-score-interactive-default-score))
(when (numberp multiple)
(setq new-score (* multiple new-score)))
;; This rule was successful, so we add the score to this
;; article.
(if (setq score (assq (mail-header-number gnus-advanced-headers)
gnus-newsgroup-scored))
(setcdr score
(+ (cdr score) new-score))
(push (cons (mail-header-number gnus-advanced-headers)
new-score)
gnus-newsgroup-scored)
(when trace
(push (cons "A file" rule)
;; Must be synced with `gnus-score-edit-file-at-point'.
gnus-score-trace)))))))
(defun gnus-advanced-score-rule (rule)
"Apply RULE to `gnus-advanced-headers'."
(let ((type (car rule)))
(cond
;; "And" rule.
((or (eq type '&) (eq type 'and))
(pop rule)
(if (not rule)
t ; Empty rule is true.
(while (and rule
(gnus-advanced-score-rule (car rule)))
(pop rule))
;; If all the rules were true, then `rule' should be nil.
(not rule)))
;; "Or" rule.
((or (eq type '|) (eq type 'or))
(pop rule)
(if (not rule)
nil
(while (and rule
(not (gnus-advanced-score-rule (car rule))))
(pop rule))
;; If one of the rules returned true, then `rule' should be non-nil.
rule))
;; "Not" rule.
((or (eq type '!) (eq type 'not) (eq type gnus-advanced-not))
(not (gnus-advanced-score-rule (nth 1 rule))))
;; This is a `1-'-type redirection rule.
((and (symbolp type)
(string-match "^[0-9]+-$\\|^\\^+$" (symbol-name type)))
(let ((gnus-advanced-headers
(gnus-parent-headers
gnus-advanced-headers
(if (string-match "^\\([0-9]+\\)-$" (symbol-name type))
;; 1- type redirection.
(string-to-number
(substring (symbol-name type)
(match-beginning 1) (match-end 1)))
;; ^^^ type redirection.
(length (symbol-name type))))))
(when gnus-advanced-headers
(gnus-advanced-score-rule (nth 1 rule)))))
;; Plain scoring rule.
((stringp type)
(gnus-advanced-score-article rule))
;; Bug-out time!
(t
(error "Unknown advanced score type: %s" rule)))))
(defun gnus-advanced-score-article (rule)
;; `rule' is a semi-normal score rule, so we find out what function
;; that's supposed to do the actual processing.
(let* ((header (car rule))
(func (assoc (downcase header) gnus-advanced-index)))
(if (not func)
(error "No such header: %s" rule)
;; Call the score function.
(funcall (caddr func) (or (cadr func) header)
(cadr rule) (caddr rule)))))
(defun gnus-advanced-string (index match type)
"See whether string MATCH of TYPE matches `gnus-advanced-headers' in INDEX."
(let* ((type (or type 's))
(case-fold-search (not (eq (downcase (symbol-name type))
(symbol-name type))))
(header (or (aref gnus-advanced-headers index) "")))
(cond
((memq type '(r R regexp Regexp))
(string-match match header))
((memq type '(s S string String))
(string-match (regexp-quote match) header))
((memq type '(e E exact Exact))
(string= match header))
((memq type '(f F fuzzy Fuzzy))
(string-match (regexp-quote (gnus-simplify-subject-fuzzy match))
header))
(t
(error "No such string match type: %s" type)))))
(defun gnus-advanced-integer (index match type)
(if (not (memq type '(< > <= >= =)))
(error "No such integer score type: %s" type)
(funcall type (or (aref gnus-advanced-headers index) 0) match)))
(defun gnus-advanced-date (index match type)
(let ((date (apply 'encode-time (parse-time-string
(aref gnus-advanced-headers index))))
(match (apply 'encode-time (parse-time-string match))))
(cond
((eq type 'at)
(equal date match))
((eq type 'before)
(time-less-p match date))
((eq type 'after)
(time-less-p date match))
(t
(error "No such date score type: %s" type)))))
(defun gnus-advanced-body (header match type)
(when (string= header "all")
(setq header "article"))
(with-current-buffer nntp-server-buffer
(let* ((request-func (cond ((string= "head" header)
'gnus-request-head)
((string= "body" header)
'gnus-request-body)
(t 'gnus-request-article)))
ofunc article handles)
;; Not all backends support partial fetching. In that case, we
;; just fetch the entire article.
;; When scoring by body, we need to peek at the headers to detect the
;; content encoding
(unless (or (gnus-check-backend-function
(intern (concat "request-" header))
gnus-newsgroup-name)
(string= "body" header))
(setq ofunc request-func)
(setq request-func 'gnus-request-article))
(setq article (mail-header-number gnus-advanced-headers))
(gnus-message 7 "Scoring article %s..." article)
(when (funcall request-func article gnus-newsgroup-name)
(when (string= "body" header)
(setq handles (gnus-score-decode-text-parts)))
(goto-char (point-min))
;; If just parts of the article is to be searched and the
;; backend didn't support partial fetching, we just narrow to
;; the relevant parts.
(when ofunc
(if (eq ofunc 'gnus-request-head)
(narrow-to-region
(point)
(or (search-forward "\n\n" nil t) (point-max)))
(narrow-to-region
(or (search-forward "\n\n" nil t) (point))
(point-max))))
(let* ((case-fold-search (not (eq (downcase (symbol-name type))
(symbol-name type))))
(search-func
(cond ((memq type '(r R regexp Regexp))
're-search-forward)
((memq type '(s S string String))
'search-forward)
(t
(error "Invalid match type: %s" type)))))
(goto-char (point-min))
(prog1
(funcall search-func match nil t)
(widen)))
(when handles (mm-destroy-parts handles))))))
(provide 'gnus-logic)
;;; gnus-logic.el ends here
|
