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(in-package :extreload)
(defvar *wg* (wait-group:make-wait-group))
(defvar *devtools-root-call-id* (make-instance 'call-id))
(defvar *reloaded-count* 0)
(defvar *extension-targets-count* 0)
(defvar *last-session-id* "")
(defconstant +timeout-seconds+ 5)
(opts:define-opts
(:name :socket-url
:description "DevTools protocol WebSocket URL"
:long "socket-url"
:arg-parser #'identity
:meta-var "SOCKET_URL")
(:name :reload-current-tab
:description "pass this to reload the active Chrome tab"
:long "reload-current-tab")
(:name :help
:description "print this help menu"
:short #\h
:long "help")
(:name :version
:description "show the program version"
:short #\V
:long "version"))
(defun main ()
(handler-bind ((error #'(lambda (e)
(exit-with-error e sysexits:+unavailable+))))
(let ((config (parse-options)))
;; Store the WebSocket client as a global.
(defvar *client* (ws-client config))
(trivial-timeout:with-timeout (+timeout-seconds+)
(with-websocket-connection (*client*)
(wsd:on :message *client*
#'(lambda (message)
(ws-on-message
message
(extension-ids config)
(reload-current-tab config))))
(websocket-send *client* (target-get-targets-msg
(next-call-id *devtools-root-call-id*)))
(wait-group:wait *wg*))))))
(defun ws-on-message (message extension-ids reload-current-tab)
(let* ((response (jsown:parse message))
(targets (parse-get-targets-response response)))
(when targets
(let ((targets (extension-targets targets)))
(setf *extension-targets-count* (length targets))
(reload-extensions targets extension-ids)))
(if (target-attached-to-target-msg-p response)
(reload-extension (json-obj-get
(json-obj-get response "params")
"sessionId")))
(when (and reload-current-tab
(runtime-evaluate-msg-p response))
(reload-tab (json-obj-get
(json-obj-get response "result")
"sessionId")))
;; Failed to reload tab.
(when (jsown:keyp (json-obj-get response "result") "exceptionDetails")
(reload-tab (json-obj-get response "sessionId")))
(format t "Response: ~a~%" response)
(format t "~a~%" *wg*)
(wait-group:done *wg*)))
(defun json-obj-get (obj key)
(handler-case
(jsown:val obj key)
(simple-error (e)
(let ((s (format nil "~A" e)))
(if (search "not available" s)
nil)))))
;;; TODO: Rename to attach-extensions
(defun reload-extensions (targets extension-ids)
(labels ((requested-extension-p (target)
(find-if
#'(lambda (id)
(uiop:string-prefix-p
(concatenate 'string "chrome-extension://" id)
(json-obj-get target "url")))
extension-ids)))
(dolist (extension (filter #'requested-extension-p targets))
(attach-to-target extension))))
(defun attach-to-target (extension)
(let ((target-id (json-obj-get extension "targetId")))
(websocket-send *client*
(target-attach-to-target-msg
(next-call-id *devtools-root-call-id*)
target-id))))
(defun reload-extension (session-id)
;; Use call ID "1" as this is the first message sent to the attached target.
(format t "reloading EXTENSION~%")
(setf *last-session-id* session-id)
(websocket-send *client*
(runtime-evaluate-msg 1 session-id "chrome.runtime.reload()"))
(incf *reloaded-count*))
(defun reload-tab (session-id)
;; Use call ID "2" as this will always be sent after a `reload-extension`
;; message.
(format t "reloading NOW~%")
(websocket-send
*client*
(runtime-evaluate-msg 2 session-id "chrome.tabs.reload()")))
(defun extension-targets (targets)
(labels ((extensionp (target)
(string= (json-obj-get target "type")
"background_page")))
(filter #'extensionp targets)))
(defun websocket-send (client data)
(wsd:send client data)
(wait-group:add *wg*))
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