;;; spine.el — personal reading tracker, served from Emacs
;; --- package bootstrap ------------------------------------------------
(require 'package)
(add-to-list 'package-archives
'("melpa" . "https://melpa.org/packages/")
t)
(package-initialize)
(dolist (pkg '(simple-httpd mustache ht))
(unless (package-installed-p pkg)
(package-refresh-contents)
(package-install pkg)))
(require 'simple-httpd)
(require 'mustache)
(require 'ht)
(require 'cl-lib)
;; --- configuration ----------------------------------------------------
(defvar spine-port 8080
"Port for the Spine HTTP server.")
(defvar spine-host nil
"Host for the Spine HTTP server.
nil means localhost only. Set to a string like \"0.0.0.0\" to listen on
all interfaces.")
(defvar spine-org-file "~/spine/books.org"
"Path to the spine.org data file.")
(defvar spine-template-dir
(expand-file-name "templates/"
(file-name-directory load-file-name))
"Directory containing .mustache templates.")
;; --- template rendering -----------------------------------------------
(defun spine-render (name context)
"Render templates/NAME.mustache with CONTEXT (an ht hash table).
Returns the rendered string."
(mustache-render
(with-temp-buffer
(insert-file-contents
(expand-file-name name spine-template-dir))
(buffer-string))
context))
(defun spine--h (text)
"HTML-escape TEXT."
(when text
(let ((s text))
(setq s (replace-regexp-in-string "&" "&" s))
(setq s (replace-regexp-in-string "<" "<" s))
(setq s (replace-regexp-in-string ">" ">" s))
(setq s (replace-regexp-in-string "\"" """ s))
s)))
(defun spine-index-model (books &optional selected-id)
"Build the view model ht for templates/index.mustache from BOOKS.
SELECTED-ID expands the matching book's detail section."
(let* ((status-labels
'(("WANT" . "on deck")
("READING" . "reading")
("READ" . "read")
("ABANDONED" . "abandoned")))
(format-icons
'(("hardcover" . "ti-book")
("ebook" . "ti-device-tablet")
("audiobook" . "ti-headphones")))
(order '("WANT" "READING" "READ" "ABANDONED"))
(grouped (make-hash-table :test 'equal))
(total (length books))
(reading-count 0))
(dolist (book books)
(when (equal "READING" (plist-get book :status))
(cl-incf reading-count)))
(dolist (book books)
(let ((status (or (plist-get book :status) "WANT")))
(push book (gethash status grouped))))
(let ((groups nil))
(dolist (status order)
(let ((group-books (nreverse (gethash status grouped))))
(when group-books
(let ((book-models nil))
(dolist (book group-books)
(let* ((id (plist-get book :id))
(selected (equal id selected-id))
(fmt (plist-get book :format))
(rating (plist-get book :rating))
(notes (plist-get book :notes))
(status (or (plist-get book :status) "WANT"))
(model
(ht
("format_icon"
(or (cdr (assoc fmt format-icons)) ""))
("status_class" (downcase status))
("status_label" (downcase status))
("title" (plist-get book :title))
("author" (or (plist-get book :author) ""))
("tags_inline"
(let ((tags (plist-get book :tags)))
(when tags
(mapconcat (lambda (tag) (concat ":" tag ":"))
tags " "))))
("rec_via" (plist-get book :rec_by))
("rating_display"
(when (and rating (> (length rating) 0))
(make-string (string-to-number rating) ?\u2605)))
("selected" selected)
("detail"
(when selected
(ht
("meta"
(let ((added (plist-get book :added))
(fmt (plist-get book :format)))
(cond
((and added fmt)
(format "started %s · %s" added fmt))
(added (format "started %s" added))
(fmt (format "format: %s" fmt))
(t ""))))
("notes"
(when notes
(cl-loop for (date text) in notes
collect (ht
("date" (format "[%s]" date))
("text" text)))))))))))
(push model book-models)))
(push (ht ("label" (cdr (assoc status status-labels)))
("count" (length group-books))
("books" (nreverse book-models)))
groups)))))
(ht ("app_title" "spine")
("total_books" total)
("reading_count" reading-count)
("groups" (nreverse groups))))))
(defun spine--extract-notes (hl-begin hl-end)
"Extract reading notes from headline body between HL-BEGIN and HL-END.
Returns list of (date-string text-string) pairs."
(let ((notes nil))
(save-excursion
(goto-char hl-begin)
;; Skip past PROPERTIES and LOGBOOK drawers
(while (re-search-forward
"^[ \t]*:\\(PROPERTIES\\|LOGBOOK\\):" hl-end t)
(re-search-forward "^[ \t]*:END:" hl-end t))
;; Collect note lines: "- [YYYY-MM-DD] text"
(while (re-search-forward
"^- \\[\\([0-9]\\{4\\}-[0-9]\\{2\\}-[0-9]\\{2\\}\\)\\] \\(.*\\)"
hl-end t)
(push (list (match-string 1) (match-string 2)) notes)))
(nreverse notes)))
(defun spine--prop (pos prop)
"Get Org property PROP at headline position POS.
Returns nil for empty or missing properties."
(let ((val (save-excursion
(goto-char pos)
(org-entry-get nil prop))))
(and val (> (length val) 0) val)))
(defun spine-books ()
"Return a list of plists, one per top-level headline in `spine-org-file'.
Returns nil if the file is missing or cannot be parsed."
(if (not (file-exists-p spine-org-file))
(progn
(message "spine-books: file not found: %s" spine-org-file)
nil)
(condition-case err
(with-temp-buffer
(insert-file-contents spine-org-file)
(org-mode)
(let ((books nil))
(org-element-map (org-element-parse-buffer 'headline) 'headline
(lambda (hl)
(when (= (org-element-property :level hl) 1)
(let ((pos (org-element-property :begin hl)))
(push (list :id (spine--prop pos "ID")
:title (org-element-property :title hl)
:status (org-element-property :todo-keyword hl)
:author (spine--prop pos "AUTHOR")
:isbn (spine--prop pos "ISBN")
:cover (spine--prop pos "COVER")
:format (spine--prop pos "FORMAT")
:rec_by (spine--prop pos "REC_BY")
:rec_note (spine--prop pos "REC_NOTE")
:rating (spine--prop pos "RATING")
:added (spine--prop pos "ADDED")
:tags (org-element-property :tags hl)
:notes (spine--extract-notes
(org-element-property :begin hl)
(org-element-property :end hl)))
books)))))
(nreverse books)))
(error
(message "spine-books: failed to parse %s: %s"
spine-org-file (error-message-string err))
nil))))
(defun spine-render-empty-state ()
"Render a page indicating no books file was found."
(concat "\n\n\n"
"\n"
"\n"
"Spine\n"
"\n"
"\n\n"
"\n"
"\n"
"\n"
"No books yet.
\n"
"\n"
"\n\n"))
(defvar spine-skip-server-start nil
"When non-nil, do not start the HTTP server.
Set by test harnesses that only need the model functions.")
;; --- handlers ---------------------------------------------------------
(defservlet index text/html (path query request)
(let ((books (spine-books)))
(if books
(insert (spine-render "index.mustache"
(spine-index-model books (cadr (assoc "id" query)))))
(insert (spine-render-empty-state)))))
(defun httpd/ (proc uri-path query request)
"Redirect root to /index."
(httpd-redirect proc "/index" 302))
;; --- start ------------------------------------------------------------
(unless spine-skip-server-start
(setq httpd-host spine-host)
(setq httpd-port spine-port)
(httpd-start)
(message "Spine listening on http://%s:%d"
(or spine-host "localhost") spine-port))
(provide 'spine)
;;; spine.el ends here