100 lines
3.4 KiB
EmacsLisp
100 lines
3.4 KiB
EmacsLisp
;;; calibre-book.el --- Create and manage Lisp representations of books -*- lexical-binding:t -*-
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;; Copyright (C) 2023 Free Software Foundation, Inc.
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;; Author: Kjartan Oli Agustsson <kjartanoli@disroot.org>
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;; Maintainer: Kjartan Oli Agustsson <kjartanoli@disroot.org>
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;; This file is part of calibre.el.
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;; calibre.el is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; calibre.el is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with calibre.el. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Functions for creating and accessing the values of Lisp
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;; representations of books
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;;; Code:
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(require 'parse-time)
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(cl-defstruct calibre-book
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(id nil
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:read-only t
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:type integer
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:documentation "The ID of the book in the Calibre database.")
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(title nil
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:type string
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:documentation "The title of the book.")
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(authors nil
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:type list
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:documentation "The authors of the book.")
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(publisher nil
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:type (or string null)
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:documentation "The publisher of the book.")
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(series nil
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:type (or string null)
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:documentation "The series the book is a part of.")
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(series-index 1
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:type number
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:documentation "The book's position within its series.")
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(formats nil
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:read-only t
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:type list
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:documentation "The formats the book is available in.")
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(timestamp nil
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:read-only t
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:type list)
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(pubdate nil
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:type list
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:documentation "The book's publication date.")
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(last-modified nil
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:type list
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:documentation "The last time the book was modified.")
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(tags nil
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:type list
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:documentation "Tags associated with the book.")
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(path nil
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:type string
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:documentation "The book's position within the library")
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(file-name nil
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:type string
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:documentation "The book's filename, sans extension."))
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(defcustom calibre-format-preferences '(pdf epub)
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"The preference order of file formats."
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:type '(repeat :tag "Format" symbol)
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:package-version '("calibre" . "0.1.0")
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:group 'calibre)
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(defun calibre-book--pick-format (book)
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"Return the preferred format for BOOK."
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(let ((pref (seq-intersection calibre-format-preferences
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(calibre-book-formats book))))
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(car (if pref pref (calibre-book-formats book)))))
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(defun calibre-book-sort-by-series (a b)
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"Return t if A should appear before B when sorting by series."
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(if (not (calibre-book-series a))
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t
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(if (not (calibre-book-series b))
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nil
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(let ((v (compare-strings (calibre-book-series a) nil nil
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(calibre-book-series b) nil nil)))
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(if (numberp v)
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(< v 0)
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(< (calibre-book-series-index a)
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(calibre-book-series-index b)))))))
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(provide 'calibre-book)
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;;; calibre-book.el ends here
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