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1;;;; News page for Ellinika
2;;;; Copyright (C) 2004, 2005, 2006 Sergey Poznyakoff
3;;;;
4;;;; This program is free software; you can redistribute it and/or modify
5;;;; it under the terms of the GNU General Public License as published by
6;;;; the Free Software Foundation; either version 2 of the License, or
7;;;; (at your option) any later version.
8;;;;
9;;;; This program is distributed in the hope that it will be useful,
10;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
11;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12;;;; GNU General Public License for more details.
13;;;;
14;;;; You should have received a copy of the GNU General Public License
15;;;; along with this program; if not, write to the Free Software
16;;;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17;;;;
18
19;;; Tailor this statement to your needs if necessary.
20(set! %load-path (cons "GUILE_SITE" %load-path))
21
22(use-modules ifelse(IFACE,[CGI],(www cgi),(guile-user))
23 (gamma sql)
24 (gamma gettext)
25 (xmltools dict)
26 (ellinika xlat)
27 (ellinika cgi))
28
29ifelse(IFACE,[CGI],(cgi:init))
30
31(define tmpl (if (and monima-nea-template-file-name
32 (cgi:value "timestamp"))
33 monima-nea-template-file-name
34 nea-template-file-name))
35
36(ellinika-cgi-init tmpl)
37
38(define conn #f)
39(define article #f)
40(define accepted-lang (map
41 (lambda (s)
42 (cond
43 ((string-split s #\;) =>
44 (lambda (l)
45 (car l)))
46 (else
47 s)))
48 (string-split (or
49 (getenv "HTTP_ACCEPT_LANGUAGE")
50 "")
51 #\,)))
52
53(define nea-max-rows 20) ;; FIXME: Move to the config
54
55(define (permalink tag timestamp)
56 (display (string-append "<" tag " class=\"permalink\">"))
57 (display "<a href=\"")
58 (display (make-cgi-name cgi-script-name "timestamp" timestamp))
59 (display "\">[permanent link]</a>")
60 (display (string-append "</" tag ">")))
61
62(define (sql-error-handler err descr)
63 (format #t "<h1 class=\"error\">~A</h1>\n"
64 (_ "ΣΦΆΛΜΑ: σύνδεση με την βάση δεδομένων απέτυχε."))
65 (with-output-to-port
66 (current-error-port)
67 (lambda ()
68 (display err)
69 (display ": ")
70 (display descr))))
71
72(defmacro catch-sql (expr)
73 `(catch 'gsql-error
74 (lambda () ,expr)
75 (lambda (key err descr)
76 (sql-error-handler err descr))))
77
78(defmacro assert-article (. expr)
79 `(if article
80 (cond
81 ((null? article)
82 (format #t "<h1 class=\"error\">~A</h1>\n"
83 (_ "Κάμια καταχώρηση")))
84 (else
85 ,@expr))))
86
87(define (make-sql-list input-list)
88 (let loop ((str "")
89 (input-list input-list))
90 (if (null? input-list)
91 (string-append "(" str ")")
92 (loop (string-append str
93 (if (string-null? str) "'" ",'")
94 (car input-list) "'")
95 (cdr input-list)))))
96
97(define (get-sql-lang conn ident langlist)
98 (let ((res (map car (sql-query conn
99 (string-append
100 "SELECT lang "
101 "FROM newsart "
102 "WHERE ident=" ident " "
103 "AND lang in " (make-sql-list langlist))))))
104 (cond
105 ((null? res)
106 #f)
107 (else
108 (call-with-current-continuation
109 (lambda (return)
110 (for-each
111 (lambda (elt)
112 (if (member elt res)
113 (return elt)))
114 langlist)))))))
115
116(define (make-my-lang-list)
117 (map language-code (cons target-language
118 accepted-lang)))
119
120
121(define (collect-entries from fwd)
122 (let loop ((start from)
123 (result '()))
124 (cond
125 ((not fwd)
126 (set! start (- start nea-max-rows))
127 (if (< start 0)
128 (set! start 0))))
129 (call-with-current-continuation
130 (lambda (return)
131 (let ((tuples (sql-query
132 conn
133 (format #f
134 "SELECT date,ident FROM news ORDER BY 1 DESC LIMIT ~A,~A"
135 start nea-max-rows))))
136 (cond
137 ((null? tuples)
138 (cons start (if fwd (reverse result) result)))
139 (else
140 (let ((langlist (make-my-lang-list))
141 (rest (- nea-max-rows (length result)))
142 (ctr 0))
143 (for-each
144 (lambda (entry)
145 (let ((lang (get-sql-lang conn (list-ref entry 1) langlist)))
146 (set! ctr (1+ ctr))
147 (if lang
148 (let ((hdr (sql-query conn
149 (string-append
150 "SELECT header,lang "
151 "FROM newsart "
152 "WHERE ident=" (list-ref entry 1) " "
153 "AND lang='" lang "' "
154 "LIMIT 1"))))
155 (cond
156 (hdr
157 (set! result (cons
158 (cons (caar hdr) entry)
159 result))
160 (set! rest (1- rest))
161 (cond
162 ((= 0 rest)
163 (if fwd
164 (return (cons (+ ctr start) (reverse result)))
165 (return (cons (+ start (- nea-max-rows ctr))
166 result)))))))))))
167
168 (if fwd
169 tuples
170 (reverse tuples)))
171
172 (cond
173 ((and (not fwd) (= 0 start))
174 (cons start (if fwd (reverse result) result)))
175 (else
176 (if fwd
177 (set! start (+ ctr start)))
178 (loop start result)))))))))))
179
180(define (summary)
181 (catch-sql
182 (let* ((count (catch #t
183 (lambda ()
184 (string->number
185 (caar (sql-query conn "SELECT count(*) FROM news"))))
186 (lambda args
187 0)))
188 (from (catch #t
189 (lambda ()
190 (let ((x (string->number (cgi:value "from"))))
191 (if (< x count)
192 x
193 0)))
194 (lambda args
195 0)))
196 (fwd (let ((dir (cgi:value "dir")))
197 (or (not dir)
198 (string=? dir "1"))))
199 (entries (collect-entries from fwd)))
200
201 (let ((start (car entries))
202 (result (cdr entries)))
203 (cond
204 ((null? result)
205 (display "<div align=\"center\">")
206 (display (_ "Κανένα νέα"))
207 (display "</div>"))
208 (else
209 (let ((num-entries (length result))
210 (begin (if fwd from start))
211 (end (if fwd start from))
212 (id (cgi:value "id")))
213
214 (cond
215 ((not (and (= from 0) (< num-entries nea-max-rows)))
216 (display "<p>")
217 (format #t (_ "Εγγραφείς ~A - ~A") begin end)
218 (display "</p>")))
219
220 (display "<table class=\"news-summary frame\">\n")
221 (let ((ctr 0)
222 (langlist (make-my-lang-list)))
223 (for-each
224 (lambda (entry)
225 (display "<tr class=\"")
226 (display (if (= (modulo ctr 2) 0) "even" "odd"))
227 (display "\">\n")
228 (set! ctr (1+ ctr))
229 (display "<td class=\"date\">")
230 (display (list-ref entry 1))
231 (display "</td>")
232 (display "<td class=\"subject")
233 (cond
234 ((and id (string=? (list-ref entry 2) id))
235 (display " current\">")
236