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chatgpt-shell-google.el
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;;; chatgpt-shell-google.el --- Google-specific logic -*- lexical-binding: t -*-
;; Copyright (C) 2023 Alvaro Ramirez
;; Author: Alvaro Ramirez https://xenodium.com
;; URL: https://github.com/xenodium/chatgpt-shell
;; Package-Requires: ((emacs "28.1") (shell-maker "0.72.1"))
;; This package 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, or (at your option)
;; any later version.
;; This package 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Adds Google specifics for `chatgpt-shell'.
;;; Code:
(eval-when-compile
(require 'cl-lib))
(require 'shell-maker)
(require 'map)
(defvar chatgpt-shell-proxy)
(defcustom chatgpt-shell-google-key nil
"Google API key as a string or a function that loads and returns it."
:type '(choice (function :tag "Function")
(string :tag "String"))
:group 'chatgpt-shell)
(defcustom chatgpt-shell-google-api-url-base "https://generativelanguage.googleapis.com"
"Google API's base URL.
API url = base + path.
If you use Gemini through a proxy service, change the URL base."
:type 'string
:safe #'stringp
:group 'chatgpt-shell)
;; https://ai.google.dev/gemini-api/docs/tokens
;; A token is equivalent to _about_ 4 characters.
(cl-defun chatgpt-shell-google-make-model (&key version short-version path token-width context-window)
"Create a Google model.
Set VERSION, SHORT-VERSION, PATH, TOKEN-WIDTH, CONTEXT-WINDOW and
VALIDATE-COMMAND handler."
(unless version
(error "Missing mandatory :version param"))
(unless short-version
(error "Missing mandatory :short-version param"))
(unless path
(error "Missing mandatory :path param"))
(unless token-width
(error "Missing mandatory :token-width param for %s" version))
(unless context-window
(error "Missing mandatory :context-window param for %s" version))
`((:version . ,version)
(:short-version . ,short-version)
(:label . "Gemini")
(:provider . "Google")
(:path . ,path)
(:token-width . ,token-width)
(:context-window . ,context-window)
(:url-base . chatgpt-shell-google-api-url-base)
(:handler . chatgpt-shell-google--handle-gemini-command)
(:filter . chatgpt-shell-google--extract-gemini-response)
(:payload . chatgpt-shell-google--make-payload)
(:url . chatgpt-shell-google--make-url)
(:headers . chatgpt-shell-google--make-headers)
(:key . chatgpt-shell-google-key)
(:validate-command . chatgpt-shell-google--validate-command)))
(defun chatgpt-shell-google-models ()
"Build a list of Google LLM models available."
;; Context windows have been verified as of 11/26/2024. See
;; https://ai.google.dev/gemini-api/docs/models/gemini.
(list (chatgpt-shell-google-make-model :version "gemini-1.5-pro-latest"
:short-version "1.5-pro-latest"
:path "/v1beta/models/gemini-1.5-pro-latest"
:token-width 4
:context-window 2097152)
(chatgpt-shell-google-make-model :version "gemini-exp-1206"
:short-version "exp-1206"
:path "/v1beta/models/gemini-exp-1206"
:token-width 4
:context-window 2097152)
(chatgpt-shell-google-make-model :version "gemini-1.5-flash-latest"
:short-version "1.5-flash-latest"
:path "/v1beta/models/gemini-1.5-flash-latest"
:token-width 4
:context-window 1048576)
(chatgpt-shell-google-make-model :version "gemini-2.0-flash-exp"
:short-version "2.0-flash-exp"
:path "/v1beta/models/gemini-2.0-flash-exp"
:token-width 4
:context-window 1048576)
(chatgpt-shell-google-make-model :version "gemini-2.0-flash-thinking-exp-1219"
:short-version "2.0-flash-thinking-exp"
:path "/v1beta/models/gemini-2.0-flash-thinking-exp-1219"
:token-width 4
:context-window 32767)))
(defun chatgpt-shell-google--validate-command (_command _model _settings)
"Return error string if command/setup isn't valid."
(unless chatgpt-shell-google-key
"Variable `chatgpt-shell-google-key' needs to be set to your key.
Try M-x set-variable chatgpt-shell-google-key
or
(setq chatgpt-shell-google-key \"my-key\")"))
(defun chatgpt-shell-google-key ()
"Get the Google API key."
(cond ((stringp chatgpt-shell-google-key)
chatgpt-shell-google-key)
((functionp chatgpt-shell-google-key)
(condition-case _err
(funcall chatgpt-shell-google-key)
(error
"KEY-NOT-FOUND")))
(t
nil)))
(cl-defun chatgpt-shell-google--make-url (&key _command model settings)
"Create the API URL using MODEL and SETTINGS."
(unless model
(error "Missing mandatory :model param"))
(unless settings
(error "Missing mandatory :settings param"))
(concat chatgpt-shell-google-api-url-base
(or (map-elt model :path)
(error "Provider :path not found"))
(if (map-elt settings :streaming)
":streamGenerateContent"
":generateContent")
"?key="
(or (chatgpt-shell-google-key)
(error "Your chatgpt-shell-google-key is missing"))
"&alt=sse")) ;; Needed or streaming doesn't work.
(cl-defun chatgpt-shell-google--make-headers (&key _model _settings)
"Create the API headers."
(list "Content-Type: application/json; charset=utf-8"))
(cl-defun chatgpt-shell-google--make-payload (&key _model context settings)
"Create the API payload using MODEL CONTEXT and SETTINGS."
(chatgpt-shell-google--make-gemini-payload
:context context
:temperature (map-elt settings :temperature)
:system-prompt (map-elt settings :system-prompt)))
(cl-defun chatgpt-shell-google--handle-gemini-command (&key model command context shell settings)
"Handle Gemini COMMAND (prompt) using MODEL, CONTEXT, SHELL, and SETTINGS."
(shell-maker-make-http-request
:async t
:url (chatgpt-shell-google--make-url :model model
:settings settings)
:proxy chatgpt-shell-proxy
:data (chatgpt-shell-google--make-gemini-payload
:prompt command
:context context
:temperature (map-elt settings :temperature)
:system-prompt (map-elt settings :system-prompt))
:headers (list "Content-Type: application/json; charset=utf-8")
:filter #'chatgpt-shell-google--extract-gemini-response
:shell shell))
(cl-defun chatgpt-shell-google--make-gemini-payload (&key prompt context system-prompt temperature)
"Create the request payload.
Compose using PROMPT, CONTEXT, SYSTEM-PROMPT and TEMPERATURE."
(append
(when system-prompt
`((system_instruction . ((parts . ((text . ,system-prompt)))))))
`((contents . ,(vconcat
(chatgpt-shell-google--gemini-user-model-messages
(append context
(when prompt
(list (cons prompt nil)))))))
(generation_config . ((temperature . ,(or temperature 1))
;; 1 is most diverse output.
(topP . 1))))))
(defun chatgpt-shell-google--gemini-user-model-messages (context)
"Convert CONTEXT to gemini messages.
Sequence must be a vector for json serialization.
For example:
[
((role . \"user\") (parts . ((text . \"hello\"))))
((role . \"model\") (parts . ((text . \"world\"))))
]"
(let ((result))
(mapc
(lambda (item)
(when (car item)
(push (list (cons 'role "user")
(cons 'parts (vconcat ;; Vector for json
(list (list (cons 'text (car item))))))) result))
(when (cdr item)
(push (list (cons 'role "model")
(cons 'parts (vconcat ;; Vector for json
(list (list (cons 'text (cdr item))))))) result)))
context)
(nreverse result)))
(defun chatgpt-shell-google--extract-gemini-response (raw-response)
"Extract Gemini response from RAW-RESPONSE."
(if-let* ((whole (shell-maker--json-parse-string raw-response))
(response (or (let-alist whole
.error.message)
(let-alist whole
(mapconcat (lambda (choice)
(let-alist choice
(or .delta.content
.message.content)))
.choices "")))))
response
(if-let ((chunks (shell-maker--split-text raw-response)))
(let ((response)
(pending)
(result))
(mapc (lambda (chunk)
;; Response chunks come in the form:
;; data: {...}
;; data: {...}
(if-let* ((is-data (equal (map-elt chunk :key) "data:"))
(obj (shell-maker--json-parse-string (map-elt chunk :value)))
(text (let-alist obj
(or (let-alist (seq-first .candidates)
(cond ((seq-first .content.parts)
(let-alist (seq-first .content.parts)
.text))
((equal .finishReason "RECITATION")
"")
((equal .finishReason "STOP")
"")
((equal .finishReason "CANCELLED")
"Error: Request cancellled.")
((equal .finishReason "CRASHED")
"Error: An error occurred. Try again.")
((equal .finishReason "END_OF_PROMPT")
"Error: Couldn't generate a response. Try rephrasing.")
((equal .finishReason "LENGTH")
"Error: Response is too big. Try rephrasing.")
((equal .finishReason "TIME")
"Error: Timed out.")
((equal .finishReason "SAFETY")
"Error: Flagged for safety.")
((equal .finishReason "LANGUAGE")
"Error: Flagged for language.")
((equal .finishReason "BLOCKLIST")
"Error: Flagged for forbidden terms.")
((equal .finishReason "PROHIBITED_CONTENT")
"Error: Flagged for prohibited content.")
((equal .finishReason "SPII")
"Error: Flagged for sensitive personally identifiable information.")
(.finishReason
(format "\n\nError: Something's up (%s)" .finishReason))))
.error.message))))
(unless (string-empty-p text)
(setq response (concat response text)))
(setq pending (concat pending
(or (map-elt chunk :key) "")
(map-elt chunk :value)))))
chunks)
(setq result
(list (cons :filtered (unless (string-empty-p response)
response))
(cons :pending pending)))
result)
(list (cons :filtered nil)
(cons :pending raw-response)))))
(provide 'chatgpt-shell-google)
;;; chatgpt-shell-google.el ends here