50 lines
2.3 KiB
Scheme
50 lines
2.3 KiB
Scheme
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;;; convert.scm -- Convert the old database into a new one
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(declare (uses paths))
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(require-extension sqlite3)
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(require-library srfi-4)
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(define (blob->seconds blob)
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(u32vector-ref (blob->u32vector blob) 0))
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(define (convert-table db name converter #!optional select)
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(let ((count (first-result db (string-append "SELECT COUNT(*) FROM " name)))
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(progress 0))
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(for-each-row (lambda args
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(apply converter args)
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(set! progress (+ progress 1))
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(format #t "Converted ~s of ~s ~a rows\r~!" progress count name))
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db (or select (string-append "SELECT * FROM " name)))
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(newline)))
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(define (convert)
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(let ((old-db (open-database (data-file "linkwave.db")))
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(new-db (open-database (data-file "nlinkwave.db"))))
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(execute new-db "CREATE TABLE bookmark (url VARCHAR(255) UNIQUE, date INTEGER, name VARCHAR(255), description TEXT)")
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(execute new-db "CREATE TABLE tag (name VARCHAR(255) UNIQUE)")
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(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))")
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(convert-table old-db "bookmark"
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(lambda (url dateblob name description)
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(execute new-db "INSERT INTO bookmark VALUES (?, ?, ?, ?)"
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url (blob->seconds dateblob) name description)))
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(convert-table old-db "tag"
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(lambda (name)
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(execute new-db "INSERT INTO tag VALUES (?)" name)))
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(convert-table old-db "bookmark_tag"
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(lambda (url tag)
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(execute new-db "INSERT INTO bookmark_tag VALUES (?, ?)"
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(first-result new-db "SELECT rowid FROM bookmark WHERE url = ?" url)
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(first-result new-db "SELECT rowid FROM tag WHERE name = ?" tag)))
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"SELECT url, name FROM bookmark_tag JOIN tag ON (tag_id = tag.rowid)")
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(rename-file (data-file "linkwave.db") (data-file "old-linkwave.db"))
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(rename-file (data-file "nlinkwave.db") (data-file "linkwave.db"))
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(format #t "Database converted.~%")))
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(if (file-exists? "/home/slash/.local/share/linkwave/nlinkwave.db")
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(format #t "Converted database already exists.~%")
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(convert))
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