143 lines
5.1 KiB
EmacsLisp
143 lines
5.1 KiB
EmacsLisp
;;; spine.el — personal reading tracker, served from Emacs
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;; --- package bootstrap ------------------------------------------------
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(require 'package)
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(add-to-list 'package-archives
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'("melpa" . "https://melpa.org/packages/")
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t)
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(package-initialize)
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(dolist (pkg '(simple-httpd mustache ht))
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(unless (package-installed-p pkg)
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(package-refresh-contents)
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(package-install pkg)))
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(require 'simple-httpd)
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(require 'mustache)
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(require 'ht)
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(require 'cl-lib)
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;; --- configuration ----------------------------------------------------
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(defvar spine-port 8080
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"Port for the Spine HTTP server.")
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(defvar spine-host nil
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"Host for the Spine HTTP server.
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nil means localhost only. Set to a string like \"0.0.0.0\" to listen on
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all interfaces.")
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(defvar spine-org-file "~/spine/books.org"
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"Path to the spine.org data file.")
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(defvar spine-template-dir
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(expand-file-name "templates/"
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(file-name-directory load-file-name))
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"Directory containing .mustache templates.")
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;; --- template rendering -----------------------------------------------
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(defun spine-render (name context)
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"Render templates/NAME.mustache with CONTEXT (an ht hash table).
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Returns the rendered string."
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(mustache-render
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(with-temp-buffer
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(insert-file-contents
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(expand-file-name name spine-template-dir))
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(buffer-string))
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context))
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(defun spine--h (text)
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"HTML-escape TEXT."
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(when text
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(let ((s text))
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(setq s (replace-regexp-in-string "&" "&" s))
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(setq s (replace-regexp-in-string "<" "<" s))
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(setq s (replace-regexp-in-string ">" ">" s))
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(setq s (replace-regexp-in-string "\"" """ s))
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s)))
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(defun spine--extract-notes (hl-begin hl-end)
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"Extract reading notes from headline body between HL-BEGIN and HL-END.
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Returns list of (date-string text-string) pairs."
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(let ((notes nil))
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(save-excursion
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(goto-char hl-begin)
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;; Skip past PROPERTIES and LOGBOOK drawers
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(while (re-search-forward
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"^[ \t]*:\\(PROPERTIES\\|LOGBOOK\\):" hl-end t)
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(re-search-forward "^[ \t]*:END:" hl-end t))
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;; Collect note lines: "- [YYYY-MM-DD] text"
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(while (re-search-forward
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"^- \\[\\([0-9]\\{4\\}-[0-9]\\{2\\}-[0-9]\\{2\\}\\)\\] \\(.*\\)"
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hl-end t)
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(push (list (match-string 1) (match-string 2)) notes)))
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(nreverse notes)))
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(defun spine--prop (pos prop)
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"Get Org property PROP at headline position POS.
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Returns nil for empty or missing properties."
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(let ((val (save-excursion
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(goto-char pos)
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(org-entry-get nil prop))))
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(and val (> (length val) 0) val)))
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(defun spine-books ()
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"Return a list of plists, one per top-level headline in `spine-org-file'.
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Returns nil if the file is missing or cannot be parsed."
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(unless (file-exists-p spine-org-file)
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(message "spine-books: file not found: %s" spine-org-file)
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(cl-return-from spine-books nil))
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(condition-case err
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(with-temp-buffer
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(insert-file-contents spine-org-file)
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(org-mode)
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(let ((books nil))
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(org-element-map (org-element-parse-buffer 'headline) 'headline
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(lambda (hl)
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(when (= (org-element-property :level hl) 1)
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(let ((pos (org-element-property :begin hl)))
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(push (list :id (spine--prop pos "ID")
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:title (org-element-property :title hl)
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:status (org-element-property :todo-keyword hl)
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:author (spine--prop pos "AUTHOR")
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:isbn (spine--prop pos "ISBN")
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:cover (spine--prop pos "COVER")
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:format (spine--prop pos "FORMAT")
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:rec_by (spine--prop pos "REC_BY")
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:rec_note (spine--prop pos "REC_NOTE")
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:rating (spine--prop pos "RATING")
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:added (spine--prop pos "ADDED")
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:tags (org-element-property :tags hl)
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:notes (spine--extract-notes
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(org-element-property :begin hl)
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(org-element-property :end hl)))
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books)))))
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(nreverse books)))
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(error
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(message "spine-books: failed to parse %s: %s"
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spine-org-file (error-message-string err))
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nil)))
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(defvar spine-skip-server-start nil
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"When non-nil, do not start the HTTP server.
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Set by test harnesses that only need the model functions.")
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;; --- handlers ---------------------------------------------------------
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(defservlet hello text/html ()
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(insert (spine-render "hello.mustache"
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(ht ("title" "Spine")
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("message" "Hello from Emacs.")))))
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;; --- start ------------------------------------------------------------
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(unless spine-skip-server-start
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(setq httpd-host spine-host)
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(setq httpd-port spine-port)
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(httpd-start)
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(message "Spine listening on http://%s:%d"
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(or spine-host "localhost") spine-port))
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(provide 'spine)
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;;; spine.el ends here
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