From c1d2b6dfbc9c8e7e0cc08f84f1635b776a738e07 Mon Sep 17 00:00:00 2001
From: stardiviner <numbchild@gmail.com>
Date: Thu, 18 Nov 2021 14:26:22 +0800
Subject: [PATCH] prototype of org-contacts contact complete

---
 org-contacts.el | 96 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)

diff --git a/org-contacts.el b/org-contacts.el
index 8aed353..945435e 100644
--- a/org-contacts.el
+++ b/org-contacts.el
@@ -642,6 +642,102 @@ description."
                  (run-hook-with-args-until-success
                   'org-contacts-complete-functions string))))))))
 
+(defun org-contacts-org-complete--annotation-function (candidate)
+  "Return org-contacts tags of contact candidate."
+  ;; TODO
+  "Tags: ")
+
+(defun org-contacts-org-complete--doc-function (candidate)
+  "Return org-contacts content of contact candidate."
+  (let ((name (plist-get candidate :name))
+        (file (plist-get candidate :file))
+        (position (plist-get candidate :position)))
+    (company-doc-buffer
+     ;; get org-contact headline and property drawer.
+     (with-current-buffer (find-file-noselect file)
+       (goto-char position)
+       (when (derived-mode-p 'org-mode)
+         ;; `org-edit-src-code' is not a real narrowing command.
+         ;; Remove this first conditional if you don't want it.
+         (cond ((ignore-errors (org-edit-src-code))
+                (delete-other-windows))
+               ((org-at-block-p)
+                (org-narrow-to-block))
+               (t (org-narrow-to-subtree)))
+         (buffer-substring (point-min) (point-max)))))))
+
+(defun org-contacts-org-complete--location-function (candidate)
+  "Return org-contacts location of contact candidate."
+  (let ((name (plist-get candidate :name))
+        (file (plist-get candidate :file))
+        (position (plist-get candidate :position)))
+    (with-current-buffer (find-file-noselect file)
+      (goto-char position)
+      (cons (current-buffer) position))))
+
+(defun org-contacts-org-complete-function ()
+  "Function used in `completion-at-point-functions' in `org-mode' to complete @name."
+  (when-let* ((bounds (bounds-of-thing-at-point 'symbol))
+              (begin (1- (car bounds)))
+              (end (cdr bounds))
+              (symbol (buffer-substring-no-properties begin end))
+              (org-contacts-prefix-p (string-prefix-p "@" symbol))
+              ;; (prefix (substring-no-properties symbol 1 nil))
+              )
+    (when org-contacts-prefix-p
+      (list begin
+            end
+            
+            ;; (all-completions
+            ;;  prefix
+            ;;  (mapcar
+            ;;   (lambda (contact) (plist-get contact :name))
+            ;;   (org-contacts--all-contacts))
+            ;;  'stringp)
+
+            (completion-table-dynamic
+             (lambda (_)
+               (mapcar
+                (lambda (contact) (plist-get contact :name))
+                (org-contacts--all-contacts))))
+
+            ;; :predicate 'stringp
+            ;; :exclusive 'no
+            ;; properties check out `completion-extra-properties'
+            ;; :annotation-function #'org-contacts-org-complete--annotation-function
+            ;; :exit-function ; TODO change completion candidate inserted contact name into org-contact link??
+
+            ;; :company-docsig #'identity                                    ; metadata
+            ;; :company-doc-buffer #'org-contacts-org-complete--doc-function ; doc popup
+            ;; :company-location #'org-contacts-org-complete--location-function
+            ))))
+
+(add-hook 'completion-at-point-functions 'org-contacts-org-complete-function nil 'local)
+
+(try-completion
+ "tri"
+ (mapcar
+  (lambda (contact) (plist-get contact :name))
+  (org-contacts--all-contacts)))
+
+(all-completions "Chr" (nth 2 (org-contacts-org-complete-function)))
+
+;; @Chris
+
+;; (type-of
+;;  (all-completions
+;;   "tri"
+;;   (mapcar
+;;    (lambda (contact) (plist-get contact :name))
+;;    (org-contacts--all-contacts))
+;;   'stringp))
+
+;;; TEST
+;;; @chris
+;; (add-hook 'completion-at-point-functions 'org-contacts-org-complete-function nil 'local)
+;; (remove-hook 'completion-at-point-functions 'org-contacts-completion-at-point 'local)
+;; (add-to-list 'completion-at-point-functions 'org-contacts-org-complete-function)
+
 (defun org-contacts-gnus-get-name-email ()
   "Get name and email address from Gnus message."
   (if (gnus-alive-p)