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;;; my-wikipedia.el -- wikipedia client -*- lexical-binding: t -*-
;; Copyright (C) 2023 Free Software Foundation.
;; Author: Yuchen Pei <id@ypei.org>
;; Package-Requires: ((emacs "28.2"))
;; This file is part of dotfiles.
;; dotfiles is free software: you can redistribute it and/or modify it under
;; the terms of the GNU Affero General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; dotfiles 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 Affero General
;; Public License for more details.
;; You should have received a copy of the GNU Affero General Public
;; License along with dotfiles. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; wikipedia client.
;;; Code:
(require 'my-utils)
(require 'my-markup)
(require 'my-net)
;; TODO: much of these can be generalised to any mediawiki site
(defvar my-wikipedia-lang "en")
(defvar my-wikipedia-host
(format "https://%s.wikipedia.org" my-wikipedia-lang))
(defun my-grok-wikipedia (url)
"groks wikipedia by url and returns the info of the wikipedia entry."
(with-current-buffer (url-retrieve-synchronously url)
(my-delete-http-header)
(goto-char (point-min))
(let ((results (my-grok-wikipedia-get-imdb-rating))
(html
(libxml-parse-html-region (point-min) (point-max))))
(append (my-grok-wikipedia-html html url) results))))
(defun my-grok-wikipedia-get-imdb-rating ()
(when (re-search-forward
"\\(https://\\(www\\.\\)?imdb.com/title/tt[0-9]+/\\)" nil t)
(let ((url (match-string 1)))
(with-current-buffer (url-retrieve-synchronously
(concat url "ratings"))
(goto-char (point-min))
(when
(re-search-forward
"\\([0-9,]+\\)\\s-*IMDb.*?\\([0-9\\.]+\\) / 10" nil t)
(list (cons "IMDB-link" url)
(cons "IMDB-rating" (match-string 2))
(cons "IMDB-rated-by" (match-string 1))))))))
(defun my-wikipedia-api-summary (title)
(my-url-fetch-json
(format "%s/api/rest_v1/page/summary/%s" my-wikipedia-host title)))
(defun my-grok-wikipedia-summary (url)
"get wikipedia summary using the rest api"
(let ((resp (my-wikipedia-api-summary
(replace-regexp-in-string ".*/wiki/" "" url))))
(list (cons "Wikipedia-link"
(alist-get 'page
(alist-get 'desktop
(alist-get 'content_urls resp))))
(cons "Description" (my-clean-property-value
(alist-get 'extract resp)))
(cons "Title" (alist-get 'title resp))
(cons "Cover" (alist-get 'source
(alist-get 'thumbnail resp)))
(cons "Latitude" (when-let (coord (alist-get 'coordinates resp))
(number-to-string (alist-get 'lat coord))))
(cons "Longitude" (when-let (coord (alist-get 'coordinates resp))
(number-to-string
(alist-get 'lon coord)))))))
(defun my-grok-wikipedia-html (html url)
(let* ((result (my-grok-wikipedia-summary url))
(info (car (dom-by-class html "infobox")))
(ths (dom-by-tag info 'th))
(tds (mapcar (lambda (th)
(my-dom-remove-style
(car (dom-by-tag (dom-parent info th) 'td))))
ths))
(len (length ths)))
(dotimes (unused len)
(let* ((key (my-clean-property-key
(dom-texts (pop ths) "")))
(value (my-clean-property-value
(dom-texts (pop tds) "")))
(to-push
(cond ((string-empty-p key) nil)
((string-empty-p value) nil)
((string= key "Coordinates")
(my-grok-wikipedia-clean-coordinates value))
((or (member key '("Website" "Source" "URL")))
(list (cons key (my-grok-wikipedia-fix-url value))))
(t (list (cons key value))))))
(mapc (lambda (pair) (push pair result)) to-push)))
(reverse result)))
(defun my-grok-wikipedia-clean-coordinates (raw)
(let ((float-re "\\([-+]?[0-9]+\\(?:\\.[0-9]*\\)?\\)"))
(string-match (format "%s; %s$" float-re float-re) raw)
(list (cons "Latitude" (match-string 1 raw))
(cons "Longitude" (match-string 2 raw)))))
(defun my-grok-wikipedia-fix-url (url)
(let* ((urlobj (url-generic-parse-url url))
(filename (url-filename urlobj)))
(unless (url-type urlobj)
(setf (url-type urlobj) "https")
(string-match "^\\([^/]+\\)\\(/.*\\)?$" filename)
(setf (url-host urlobj) (match-string 1 filename))
(setf (url-filename urlobj) (or (match-string 2 filename) ""))
(setf (url-fullness urlobj) t))
(url-recreate-url urlobj)))
(defun my-wikipedia-api-search (query)
(my-url-fetch-json
(format
"%s/w/api.php?action=query&format=json&list=search&srsearch=%s"
my-wikipedia-host query)))
(defun my-wikipedia-search (query)
(interactive "sQuery: ")
(generic-search-open
(alist-get 'search
(alist-get 'query
(my-wikipedia-api-search query)))
(format "wikipedia-query:%s" query)
`((formatter . my-wikipedia-format-result)
(default-action . my-wikipedia-grok-action)
(keymap . ,my-wikipedia-button-keymap))))
(defun my-wikipedia-format-result (result)
(concat
(format "%s (%d words)"
(alist-get 'title result)
(alist-get 'wordcount result))
(propertize
(format "\n\n%s"
(my-wikipedia-highlight-snippet-matches
(alist-get 'snippet result)))
'face 'default)))
(defun my-wikipedia-highlight-snippet-matches (snippet)
(with-temp-buffer
(insert snippet)
(goto-char (point-min))
(while (re-search-forward "<span class=\"searchmatch\">\\(.*?\\)</span>" nil t)
(replace-match
(propertize (match-string 1) 'face 'match)))
(buffer-string)))
(defun my-wikipedia-grok-action (info)
(interactive)
(my-org-grok (format "%s/wiki/%s"
my-wikipedia-host
(alist-get 'title info))))
(defun my-wikipedia-fetch-wiki ()
(interactive)
(my-fetch-url (format "/wiki/%s?action=raw"
my-wikipedia-host
(alist-get 'title
(get-text-property (point) 'button-data)))))
(defvar my-wikipedia-button-keymap
(let ((kmap (make-sparse-keymap)))
(set-keymap-parent kmap button-map)
(define-key kmap "f" 'my-wikipedia-fetch-wiki)
kmap))
(provide 'my-wikipedia)
;;; my-wikipedia.el ends here
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