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;;; linkwave -- 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:
;; Convert any old database file to one usable with this version of
;; linkwave. If you're just starting to use linkwave there should be
;; no need to use this.
;;; Code:
(declare (uses paths))
(require-extension sqlite3)
(require-library srfi-4)
(define (blob->seconds blob)
(if (u32vector? blob)
(u32vector-ref (blob->u32vector blob) 0)
0))
(define (convert-table db name converter #!optional select)
(let ((count (first-result db (string-append "SELECT COUNT(*) FROM " name)))
(progress 0))
(for-each-row (lambda args
(apply converter args)
(set! progress (+ progress 1))
(format #t "Converted ~s of ~s ~a rows\r~!" progress count name))
db (or select (string-append "SELECT * FROM " name)))
(newline)))
(define (convert)
(let ((old-db (open-database (data-file "linkwave.db")))
(new-db (open-database (data-file "nlinkwave.db"))))
(execute new-db "CREATE TABLE bookmark (url VARCHAR(255) UNIQUE, date INTEGER, name VARCHAR(255), description TEXT)")
(execute new-db "CREATE TABLE tag (name VARCHAR(255) UNIQUE)")
(execute new-db "CREATE TABLE bookmark_tag (bookmark_id INTEGER REFERENCES bookmark(rowid), tag_id INTEGER REFERENCES tag(rowid), PRIMARY KEY (bookmark_id, tag_id))")
(convert-table old-db "bookmark"
(lambda (url dateblob name description)
(execute new-db "INSERT INTO bookmark VALUES (?, ?, ?, ?)"
url (blob->seconds dateblob) name description)))
(convert-table old-db "tag"
(lambda (name)
(execute new-db "INSERT INTO tag VALUES (?)" name)))
(convert-table old-db "bookmark_tag"
(lambda (url tag)
(execute new-db "INSERT INTO bookmark_tag VALUES (?, ?)"
(first-result new-db "SELECT rowid FROM bookmark WHERE url = ?" url)
(first-result new-db "SELECT rowid FROM tag WHERE name = ?" tag)))
"SELECT url, name FROM bookmark_tag JOIN tag ON (tag_id = tag.rowid)")
(rename-file (data-file "linkwave.db") (data-file "old-linkwave.db"))
(rename-file (data-file "nlinkwave.db") (data-file "linkwave.db"))
(format #t "Database converted.~%")))
(if (file-exists? "/home/slash/.local/share/linkwave/nlinkwave.db")
(format #t "Converted database already exists.~%")
(convert))
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