[elpa] externals/jami-bot 63d7df8c5b 01/12: initial commit

[ELPA Syncer]

branch: externals/jami-bot
commit 63d7df8c5b6397d86bef9c0b7b2557ae11a88335
Author: Hanno Perrey <hanno@hoowl.se>
Commit: Hanno Perrey <hanno@hoowl.se>

    initial commit
---
 LICENSE     | 675 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 README.org  |  36 ++++
 jami-bot.el | 288 ++++++++++++++++++++++++++
 3 files changed, 999 insertions(+)

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000000..13fdf8f0e3
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,675 @@
+
+                    GNU GENERAL PUBLIC LICENSE
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+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
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+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/README.org b/README.org
new file mode 100644
index 0000000000..da69252177
--- /dev/null
+++ b/README.org
@@ -0,0 +1,36 @@
+#+title: =jami-bot=: An extendable Elisp chat bot for the distributed, private 
messenger Jami
+
+An extendable chat bot for the distributed, private messenger GNU Jami written
+in Emacs Lisp. It interacts with the locally-installed Jami daemon via D-Bus 
and
+reacts to both plain text messages and file transfers sent to local accounts.
+Further processing of either or both can be configured by adding functions to
+the abnormal hooks, =jami-bot-text-message-functions= and
+=jami-bot-data-transfer-functions=, respectively.
+
+Additionally, the bot allows special actions to be triggered by sending a
+text message starting with an exclamation mark and a command keyword.
+Further commands than the ones included can be configured by mapping them to
+functions through =jami-bot-command-function-alist=.
+
+Set up =jami-bot= by executing =jami-bot-register=. This will set up the
+message handler, =jami-bot--messageReceived-handler=, to be called on the
+=messageReceived= D-Bus signal.
+
+* Demo
+The extension =org-jami-bot= showcases how =jami-bot= can be used as a
+note-taking interface on the go: 
[[https://hoowl.se/org-jami-bot.html][Note-taking on the go: Capturing messages 
and
+images sent via Jami in Org mode]]
+* Extending functionality of =jami-bot=
+I have written two blog posts explaining the principles behind =jami-bot= and
+the Org mode extension =org-jami-bot=, respectively. These should provide you a
+good starting point to extend either package:
+
+- [[https://hoowl.se/jami-bot.html][An extendable GNU Jami chat bot written in 
Elisp]]
+- [[https://hoowl.se/org-jami-bot.html][Note-taking on the go: Capturing 
messages and images sent via Jami in Org mode]]
+* Troubleshooting
+** Stuck messages / no reply from =jami-bot=
+Especially should your network connectivity drop out, Jami might not be able 
to sync messages and you will see no reply. Try to stop the Jami daemon:
+#+begin_src emacs-lisp
+killall jamid
+#+end_src
+and then run =M-x jami-bot-register= to restart it and register =jami-bot= to 
listen on the /messageReceived/ signal.
diff --git a/jami-bot.el b/jami-bot.el
new file mode 100644
index 0000000000..6102e75467
--- /dev/null
+++ b/jami-bot.el
@@ -0,0 +1,288 @@
+;;; jami-bot.el --- An extendable chat bot for the private messenger GNU Jami 
-*- lexical-binding: t; -*-
+;;
+;; Copyright (C) 2023 Hanno Perrey
+;;
+;; Author: Hanno Perrey <http://gitlab.com/hperrey>
+;; Maintainer: Hanno Perrey <hanno@hoowl.se>
+;; Created: April 15, 2023
+;; Modified: April 15, 2023
+;; Version: 0.0.1
+;; Keywords: comm, jami, messenger, chat bot, dbus
+;; Homepage: https://gitlab.com/hanno/jami-bot
+;; Package-Requires: ((emacs "27.1"))
+;;
+;; This file is not part of GNU Emacs.
+;;
+;;    This program is free software: you can redistribute it and/or modify
+;;    it under the terms of the GNU General Public License as published by
+;;    the Free Software Foundation, either version 3 of the License, or
+;;    (at your option) any later version.
+;;
+;;    This program 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 General Public License for more details.
+;;
+;;    You should have received a copy of the GNU General Public License
+;;    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+;;
+;;; Commentary:
+;;
+;; An extendable chat bot for the distributed, private messenger Jami. It
+;; interacts with the locally-installed Jami daemon via D-Bus and reacts to
+;; both plain text messages and file transfers sent to local accounts. Further
+;; processing of either or both can be configured by adding functions to the
+;; abnormal hooks, `jami-bot-text-message-functions' and
+;; `jami-bot-data-transfer-functions', respectively.
+;;
+;; Additionally, the bot allows special actions to be triggered by sending a
+;; text message starting with an exclamation mark and a command keyword.
+;; Further commands than the ones included can be configured by mapping them to
+;; functions through `jami-bot-command-function-alist'.
+;;
+;; Set up `jami-bot' by executing `jami-bot-register'. This will set up the
+;; message handler, `jami-bot--messageReceived-handler', to be called on the
+;; `messageReceived' D-Bus signal.
+;;
+;;; Code:
+
+(require 'dbus)
+
+(defvar jami-bot-account-user-names nil
+  "List of account user names that `jami-bot' handles messages for.
+
+        If set to nil then `jami-bot' will react to any message
+        send to a local account. The user name is also sometimes
+        referred to as address in Jami and should be a 40
+        character has such as
+        \"badac18e13ec1a6e1266600e457859afebfb9c46\".")
+
+(defvar jami-bot-command-function-alist
+  '(("!ping" . jami-bot--command-function-ping)
+    ("!help" . jami-bot--command-function-help))
+  "Alist mapping command strings in message body to functions to be executed.
+
+Each command needs to start with an exclamation mark '!' and
+consist of a single (lowercase) word. The corresponding function needs to 
accept
+the account id, the conversation id and the message alist as
+arguments and return a string (that is sent as reply to the original 
message).")
+
+(defvar jami-bot-text-message-functions nil
+  "A list of functions that will be called when processing a plain text 
message.
+
+Functions must take the ACCOUNT and CONVERSATION ids as well as
+the actual MSG as arguments. Their return value will be ignored.")
+
+(defvar jami-bot-download-path "~/jami/"
+"Path in which to store files downloaded from conversations.
+
+Will be created if not existing yet.")
+
+(defvar jami-bot-data-transfer-functions nil
+  "A list of functions that will be called when processing a data transfer 
message.
+
+Functions must take the ACCOUNT and CONVERSATION ids as well as
+the actual MSG and the local downloaded file name, DLNAME, as
+arguments. Their return value will be ignored.")
+
+(defvar jami-bot--jami-local-account-ids nil
+  "List of `jami' local accounts user ids and name pairs.
+
+Caches output of dbus-methods 'getAccountList' and
+'getAccountDetails'. For internal use in `jami-bot'.")
+
+(defun jami-bot--messageReceived-handler (account conversation msg)
+  "Handle messages from Jami's `messageReceived' D-Bus signal.
+
+  ACCOUNT and CONVERSATION are the corresponding ids to which the
+  MSG belongs to. The latter contains additional fields such as
+  `author' and `body'. The field `type' is used to identify which
+  function to call for further processing."
+  ;; make sure we are not reacting to messages sent from our own local
+  ;; account(s) or accounts we are not to monitor
+  (unless jami-bot--jami-local-account-ids
+    (jami-bot--refresh-accountid-list))
+  (let ((author (cadr (assoc "author" msg)))
+        (type (cadr (assoc "type" msg))))
+    (when (or
+           (and jami-bot-account-user-names
+                 ;; account id should match a user name to be monitored
+                 (member (car (rassoc account 
jami-bot--jami-local-account-ids))
+                         jami-bot-account-user-names)
+                 ;; .. but msg should not be authored by ourselves
+                 (not (member author jami-bot-account-user-names)))
+            ;; no account filter: check msg not from local account
+           (and (not jami-bot-account-user-names)
+                (not (assoc author jami-bot--jami-local-account-ids))))
+      (message "jami-bot received %s message from %s on account %s." type 
author account)
+      (pcase type
+        ("text/plain"
+         (jami-bot--process-text-message
+          account
+          conversation
+          msg))
+        ("application/data-transfer+json"
+         (jami-bot--process-data-transfer
+          account
+          conversation
+          msg))
+        ;; ignore merges of the conversation; usually transparent to the user
+        ;; anyway
+        ("merge" (ignore))
+        ;; ignore new members joining
+        ("member" (ignore))
+        (_
+         (jami-bot--process-unknown-type
+          account
+          conversation
+          msg))))))
+
+(defun jami-bot--process-unknown-type (account conversation msg)
+"Handle messages of unknown type by sending an error message as reply.
+
+  ACCOUNT and CONVERSATION are the corresponding ids to which the
+  MSG belongs to."
+  (let ((type (cadr (assoc "type" msg))))
+    (message "Error: received message with unkonwn type: %s" type)
+    (jami-bot-reply-to-message
+     account
+     conversation
+     msg
+     (format "Unknown message type: %s" type))))
+
+(defun jami-bot-select-and-insert-local-account ()
+  "Prompt user for a local Jami user account and insert id at position."
+  (interactive)
+  (jami-bot--refresh-accountid-list)
+  (insert (completing-read "Pick a account user name to insert: " 
jami-bot--jami-local-account-ids)))
+
+(defun jami-bot-register ()
+  "Ping the Jami daemon and register `jami-bot' handler for receiving 
messages."
+  (interactive)
+  (or (dbus-ping :session "cx.ring.Ring")
+      (error "Jami Daemon (jamid) not available through dbus. Please check 
Jami installation"))
+  (dbus-register-signal :session "cx.ring.Ring"
+                      "/cx/ring/Ring/ConfigurationManager"
+                      "cx.ring.Ring.ConfigurationManager"
+                      "messageReceived"
+                      #'jami-bot--messageReceived-handler))
+
+(defun jami-bot--process-text-message (account conversation msg)
+  "Process plain text messages and parse the message body for commands.
+
+  ACCOUNT and CONVERSATION are the corresponding ids to which the
+  message MSG belongs to. Messages containing commands must start
+  with an exclamation mark (\"!\") followed by the single-word
+  command. Each command is mapped to a function via
+  `jami-bot-command-function-alist' which will be executed when
+  the command is received.
+
+  If the message does not start with an exclamation mark, the
+  abnormal hook `jami-bot-text-message-functions' will be run for
+  further processing."
+  (let ((body (cadr (assoc-string "body" msg))))
+    ;; check for criteria handling first line of body as command
+    ;;  - string starts with '!' and is a single word
+    (if (string-prefix-p "!" body)
+        ;; command in msg body
+        (let*
+            ((cmd (downcase (substring body 0 (string-match-p "[^[:word:]!]" 
body))))
+             (fcn (cdr (assoc-string cmd jami-bot-command-function-alist))))
+          ;; remove the command from the message body
+          (setcdr (assoc-string "body" msg)
+                  (list (string-trim-left (string-remove-prefix cmd body))))
+          (if fcn
+            ;; call function and reply with return value
+            (jami-bot-reply-to-message
+             account
+             conversation
+             msg
+             (funcall fcn account conversation msg))
+            ;; no matching command defined:
+            ;; report error as reply to msg
+            (jami-bot-reply-to-message
+             account
+             conversation
+             msg
+             (format "Unknown command: %s" cmd))))
+      ;; not a command in msg body: run hook instead
+      (run-hook-with-args 'jami-bot-text-message-functions
+                          account conversation msg))))
+
+(defun jami-bot--command-function-ping (_account _conversation msg)
+  "Return the string 'pong!' followed by the message's body.
+
+Example for a basic jami bot command handling function. Acts on MSG
+received via _ACCOUNT in _CONVERSATION. The latter two are unused."
+  (let ((body (cadr (assoc-string "body" msg))))
+    (format "pong! %s" body)))
+
+(defun jami-bot--command-function-help (_account _conversation _msg)
+  "Return a summary of available commands.
+
+Acts on _MSG received via _ACCOUNT in _CONVERSATION, none of
+which are used."
+  (let (result)
+    (dolist (cmd jami-bot-command-function-alist (string-join result "\n"))
+      (push (concat "- " (car cmd) " :: "
+                    (car (split-string (documentation (cdr cmd)) "\n"))) 
result))))
+
+(defun jami-bot--process-data-transfer (account conversation msg)
+  "Process data transfer from received messages.
+
+  Downloads files to the path given by `jami-bot-download-path'
+  and calls the abnormal hook `jami-bot-data-transfer-functions'
+  for further processing. ACCOUNT and CONVERSATION are the
+  corresponding ids to which the message MSG belongs to."
+  (let* ((id (cadr (assoc-string "id" msg)))
+         (fileid (cadr (assoc-string "fileId" msg)))
+         (filename (cadr (assoc-string "displayName" msg)))
+         (dlpath (file-name-as-directory
+                  (expand-file-name jami-bot-download-path)))
+         (dlname (concat dlpath (format-time-string "%Y%m%d-%H%M") "_" 
filename)))
+    (unless (file-directory-p dlpath) (make-directory dlpath 't))
+    (message "jami-bot: downloading file %s" dlname)
+    (jami-bot--dbus-cfgmgr-call-method "downloadFile" account conversation id 
fileid dlname)
+    (run-hook-with-args 'jami-bot-data-transfer-functions account conversation 
msg dlname)))
+
+(defun jami-bot--dbus-cfgmgr-call-method (method &rest args)
+  "Call Jami ConfigurationManager dbus METHOD with arguments ARGS."
+  (apply #'dbus-call-method `(:session
+                    "cx.ring.Ring"
+                    "/cx/ring/Ring/ConfigurationManager"
+                    "cx.ring.Ring.ConfigurationManager"
+                    ,method ,@(when args args))))
+
+(defun jami-bot-send-message (account conversation text &optional reply)
+  "Add TEXT to CONVERSATION via ACCOUNT. REPLY specifies a message id."
+  (jami-bot--dbus-cfgmgr-call-method "sendMessage"
+                                     account
+                                     conversation
+                                     text
+                                     `(,@(if reply reply ""))
+                                     :int32 0))
+
+(defun jami-bot-reply-to-message (account conversation msg text)
+  "Add TEXT as a reply to MSG in CONVERSATION via ACCOUNT."
+  (let ((id (cadr (assoc-string "id" msg))))
+    (jami-bot-send-message account conversation text id)))
+
+(defun jami-bot--refresh-accountid-list ()
+  "Update cached values of known local account ids.
+
+The values are stored in `jami-bot--jami-local-account-ids'."
+  (let ((accounts (jami-bot--dbus-cfgmgr-call-method
+                   "getAccountList")))
+    (let ((value))
+      (dolist (acc accounts)
+        (push (cons (cadr (assoc-string
+                           "Account.username"
+                           (jami-bot--dbus-cfgmgr-call-method
+                            "getAccountDetails"
+                            acc))) acc)
+              value))
+      (setq jami-bot--jami-local-account-ids value)))
+  jami-bot--jami-local-account-ids)
+
+(provide 'jami-bot)
+;;; jami-bot.el ends here