initial elisp binding

2 files changed, 152 insertions, 0 deletions

diff --git a/lisp/servall-client.el b/lisp/servall-client.el
new file mode 100644
index 0000000..2c6dd17
--- /dev/null
+++ b/lisp/servall-client.el
@@ -0,0 +1,50 @@
+;; -*- lexical-binding: t; -*-
+
+(defvar servall-endpoint "localhost:5555")
+(defvar servall-client-buffer-name "*servall-client*")
+
+(defun servall-api-wikipedia-search (query)
+  (servall-url-fetch-json
+   (concat servall-endpoint "/wikipedia/search/" query)))
+
+(defun servall-api-wikipedia-org (name)
+  (servall-url-fetch-json
+   (concat servall-endpoint "/wikipedia/org/" name)))
+
+(defun servall-parse-http-header (text)
+  (let ((status) (fields))
+    (with-temp-buffer
+      (insert text)
+      (goto-char (point-min))
+      (re-search-forward "^HTTP.*\\([0-9]\\{3\\}\\).*$")
+      (setq status (match-string 1))
+      (while (re-search-forward "^\\(.*?\\): \\(.*\\)$" nil t)
+        (push (cons (intern (match-string 1)) (match-string 2)) fields)))
+    (list (cons 'status status) (cons 'fields fields))))
+
+(defun servall-url-fetch-json (url &optional decompression with-header)
+  (with-current-buffer (get-buffer-create servall-client-buffer-name)
+    (goto-char (point-max))
+    (insert "[" (current-time-string) "] Request: " url "\n"))
+  (with-current-buffer (url-retrieve-synchronously url t)
+    (let ((header) (status) (fields) (json))
+      (delete-http-header)
+      (setq header (servall-parse-http-header (car kill-ring))
+            status (alist-get 'status header)
+            fields (alist-get 'fields header))
+      (with-current-buffer servall-client-buffer-name
+        (insert "[" (current-time-string) "] Response: " status "\n"))
+      (when decompression
+        (call-process-region (point) (point-max) "gunzip" t t t)
+        (goto-char (point-min)))
+      (call-interactively 'delete-trailing-whitespace)
+      (if (string= status "200")
+          (unless (= (point) (point-max))
+            (if with-header
+                (list
+                 (cons 'header fields)
+                 (cons 'json (json-read)))
+              (json-read)))
+        (error "HTTP error: %s" (buffer-substring (point) (point-max)))))))
+
+(provide 'servall-client)
diff --git a/lisp/servall-wikipedia.el b/lisp/servall-wikipedia.el
new file mode 100644
index 0000000..978e902
--- /dev/null
+++ b/lisp/servall-wikipedia.el
@@ -0,0 +1,102 @@
+;; -*- lexical-binding: t; -*-
+
+(defvar servall-results-mode-map special-mode-map)
+(defvar servall-results-buffer "*servall-results*")
+
+(define-derived-mode servall-results-mode org-mode "servall-results"
+  "Mode for showing and selecting results"
+  (setq-local buffer-read-only t
+              servall-results-update-function nil
+              servall-results-re-search-function nil
+              servall-results-open-function nil))
+
+(defun servall-results-update ()
+  (interactive)
+  (funcall servall-results-update-function))
+
+(defun servall-results-re-search ()
+  (interactive)
+  (call-interactively servall-results-re-search-function))
+
+(defun servall-results-open ()
+  (interactive)
+  (funcall servall-results-open-function))
+
+(define-key servall-results-mode-map "n" 'org-next-visible-heading)
+(define-key servall-results-mode-map "g" 'servall-results-update)
+(define-key servall-results-mode-map "\r" 'servall-results-open)
+(define-key servall-results-mode-map "p" 'org-previous-visible-heading)
+(define-key servall-results-mode-map "s" 'servall-results-re-search)
+
+(define-derived-mode servall-wikipedia-results-mode servall-results-mode
+  "servall-wikipedia-results"
+  "Mode for showing and selecting wikipedia results"
+  (setq-local servall-wikipedia-results-query nil))
+
+(defun servall-wikipedia-results-highlight ()
+  (save-excursion
+    (goto-char (point-min))
+    (while (re-search-forward "<span class=\"searchmatch\">\\(.*?\\)</span>" nil t)
+      (replace-match
+       (propertize (match-string 1) 'font-lock-face 'match)))))
+
+(defun servall-wikipedia-results-update ()
+  (let* ((resp (servall-api-wikipedia-search servall-wikipedia-results-query))
+         (results (alist-get 'search
+                             (alist-get 'query resp)))
+         (inhibit-read-only t))
+    (erase-buffer)
+    (mapc
+     (lambda (result)
+       (let ((title (alist-get 'title result)))
+         (insert
+          (propertize
+           (concat "* " title "\n")
+           'title title))
+         (insert (alist-get 'snippet result) "\n\n")))
+     results)
+    (servall-wikipedia-results-highlight)
+    (goto-char (point-min))))
+
+(defun servall-wikipedia-search (query)
+  (interactive "sWikipedia Query: ")
+  (with-current-buffer (get-buffer-create servall-results-buffer)
+    (servall-wikipedia-results-mode)
+    (setq servall-wikipedia-results-query query
+          servall-results-update-function 'servall-wikipedia-results-update
+          servall-results-re-search-function 'servall-wikipedia-search
+          servall-results-open-function 'servall-wikipedia-results-open)
+    (servall-results-update))
+  (switch-to-buffer servall-results-buffer))
+
+(defun servall-wikipedia-results-open ()
+  (when-let ((title (get-text-property (point) 'title)))
+    (switch-to-buffer-other-window (servall-wikipedia-load title))))
+
+(defun servall-wikipedia-to-name (title)
+  (replace-regexp-in-string " " "_" title))
+
+(defvar servall-wikipedia-view-mode-map special-mode-map)
+(defun servall-wikipedia-view-buffer (title)
+  (format "*wikipedia %s*" title))
+
+(defvar servall-wikipedia-view-mode-map special-mode-map)
+
+(define-derived-mode servall-wikipedia-view-mode org-mode
+  "servall-wikipedia-view"
+  "Mode for viewing wikipedia entries."
+  (setq-local buffer-read-only t
+              servall-wikipedia-title nil))
+
+(defun servall-wikipedia-load (title)
+  (let ((buffer (get-buffer-create (servall-wikipedia-view-buffer title))))
+    (with-current-buffer buffer
+      (servall-wikipedia-view-mode)
+      (setq servall-wikipedia-title title)
+      (let ((inhibit-read-only t))
+        (erase-buffer)
+        (insert (servall-api-wikipedia-org title)))
+      (goto-char (point-min)))
+    buffer))
+
+(provide 'servall-wikipedia)