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;;; markam -- Store/retrieve/manage bookmarks
;; Copyright (C) 2012 Tom Willemsen <tom at ryuslash dot org>
;; This program 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.
;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; The main program. For documentation you should consult the
;; README.org and/or any Texinfo documentation provided.
;;; Code:
(declare (uses paths
common))
(require-extension sqlite3)
(require-library posix srfi-4)
(define version "0.1.0")
;; If STR contains a \0 byte at the end, remove it, otherwise return
;; STR unchanged.
(: string-no-null (string -> string))
(define (string-no-null str)
(if (and (> (string-length str) 0)
(char=? (string-ref str (- (string-length str) 1)) #\nul))
(substring str 0 (- (string-length str) 1))
str))
;; Print URL, SECONDS, NAME and DESCRIPTION to the standard output
;; stream.
(: print-row (string fixnum string string -> void))
(define (print-row url seconds name description)
(format #t "~a~% ~a~% ~a~% ~a~%~%" (string-no-null name)
(string-no-null description) (string-no-null url)
(seconds->string seconds)))
;; Add NAME to the `tag' table in DB.
(define (add-tag db name)
(execute db "INSERT INTO tag VALUES (?)" name)
(last-insert-rowid db))
;; Add a bookmark to the `bookmark' table in DB. URL is the url of the
;; bookmark, NAME the title, DESCRIPTION a (possibly longer)
;; description of the bookmark and TAGS is a list of tags to assign to
;; it. Each tag will be created if necessary.
(define (add-bookmark db url name description tags)
(execute db "INSERT INTO bookmark VALUES (?, STRFTIME('%s'), ?, ?)"
url name description)
(let ((bookmark-id (last-insert-rowid db)))
(for-each (lambda (tag)
(let ((tag-id '()))
(condition-case
(set! tag-id
(first-result
db "SELECT rowid FROM tag WHERE name = ?" tag))
(exn (exn sqlite3)
(if (eq? (get-condition-property
exn 'sqlite3 'status) 'done)
(set! tag-id (add-tag db tag))
(signal exn))))
(execute db "INSERT INTO bookmark_tag VALUES (?, ?)"
bookmark-id tag-id)))
tags)))
;; Is STR a URL? Very naïve, assumes all URLs begin with either
;; `http://' or `https://', should be improved.
(define (url-string? str)
(and (> (string-length str) 7)
(or (string= (substring str 0 7) "http://")
(string= (substring str 0 8) "https://"))))
;; Display markam's help message.
(define (display-help)
(format #t (string-append
"Usage: markam [options]...~%"
" markam <url> <name> <description> [<tag>...]~%"
"~%"
"Possible options:~%"
"~%"
"--help, -h Display this help and exit~%"
"--version, -v Output version information and exit~%")))
;; Parse command-line arguments
(define (handle-regular-args args)
(do ((arg (car args) (and (not (null? args))
(car args))))
((or (null? arg) (not arg)))
(cond
((or (string= arg "-v") (string= arg "--version"))
(display-version)
(exit 0))
((or (string= arg "-h") (string= arg "--help"))
(display-help)
(exit 0))
(else
(format #t "Unrecognized option: ~a~%" (car args))))
(set! args (cdr args))))
;; Open a database connection, list bookmarks, create a bookmark or
;; pass arguments on to `handle-regular-args'.
(define (main args)
(let ((db (open-database (data-file "markam.db"))))
(cond
((null? args)
(for-each-row print-row db "select * from bookmark"))
((url-string? (car args))
(with-transaction
db (lambda ()
(add-bookmark
db (car args) (cadr args) (caddr args) (cdddr args)) #t)))
(else
(handle-regular-args args)))
(finalize! db #t)))
(main (command-line-arguments))
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