--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libervia/web/pages/_browser/dialog.py	Fri Jun 02 16:49:28 2023 +0200
@@ -0,0 +1,131 @@
+"""manage common dialogs"""
+
+from browser import document, window, timer, console as log
+from template import Template
+
+log.warning = log.warn
+
+
+class Confirm:
+
+    def __init__(self, message, ok_label="", cancel_label="", ok_color="success"):
+        self._tpl = Template("dialogs/confirm.html")
+        self.message = message
+        self.ok_label = ok_label
+        assert ok_color in ("success", "danger")
+        self.ok_color = ok_color
+        self.cancel_label = cancel_label
+
+    def cancel_cb(self, evt, notif_elt):
+        notif_elt.remove()
+
+    def show(self, ok_cb, cancel_cb=None):
+        if cancel_cb is None:
+            cancel_cb = self.cancel_cb
+        notif_elt = self._tpl.get_elt({
+            "message": self.message,
+            "ok_label": self.ok_label,
+            "ok_color": self.ok_color,
+            "cancel_label": self.cancel_label,
+        })
+
+        document['notifs_area'] <= notif_elt
+        timer.set_timeout(lambda: notif_elt.classList.add('state_appended'), 0)
+        for cancel_elt in notif_elt.select(".click_to_cancel"):
+            cancel_elt.bind("click", lambda evt: cancel_cb(evt, notif_elt))
+        for cancel_elt in notif_elt.select(".click_to_ok"):
+            cancel_elt.bind("click", lambda evt: ok_cb(evt, notif_elt))
+
+    def _ashow_cb(self, evt, notif_elt, resolve_cb, confirmed):
+        evt.stopPropagation()
+        notif_elt.remove()
+        resolve_cb(confirmed)
+
+    async def ashow(self):
+        return window.Promise.new(
+            lambda resolve_cb, reject_cb:
+            self.show(
+                lambda evt, notif_elt: self._ashow_cb(evt, notif_elt, resolve_cb, True),
+                lambda evt, notif_elt: self._ashow_cb(evt, notif_elt, resolve_cb, False)
+            )
+        )
+
+
+class Notification:
+
+    def __init__(self):
+        self._tpl = Template("dialogs/notification.html")
+
+    def close(self, notif_elt):
+        notif_elt.classList.remove('state_appended')
+        notif_elt.bind("transitionend", lambda __: notif_elt.remove())
+
+    def show(
+        self,
+        message: str,
+        level: str = "info",
+        delay: int = 5
+    ) -> None:
+        # we log in console error messages, may be useful
+        if level in ("warning", "error"):
+            print(f"[{level}] {message}")
+        notif_elt = self._tpl.get_elt({
+            "message": message,
+            "level": level,
+        })
+        document["notifs_area"] <= notif_elt
+        timer.set_timeout(lambda: notif_elt.classList.add('state_appended'), 0)
+        timer.set_timeout(lambda: self.close(notif_elt), delay * 1000)
+        for elt in notif_elt.select('.click_to_close'):
+            elt.bind('click', lambda __: self.close(notif_elt))
+
+
+class RetryNotification:
+    def __init__(self, retry_cb):
+        self._tpl = Template("dialogs/retry-notification.html")
+        self.retry_cb = retry_cb
+        self.counter = 0
+        self.timer = None
+
+    def retry(self, notif_elt):
+        if self.timer is not None:
+            timer.clear_interval(self.timer)
+            self.timer = None
+        notif_elt.classList.remove('state_appended')
+        notif_elt.bind("transitionend", lambda __: notif_elt.remove())
+        self.retry_cb()
+
+    def update_counter(self, notif_elt):
+        counter = notif_elt.select_one(".retry_counter")
+        counter.text = str(self.counter)
+        self.counter -= 1
+        if self.counter < 0:
+            self.retry(notif_elt)
+
+    def show(
+        self,
+        message: str,
+        level: str = "warning",
+        delay: int = 5
+    ) -> None:
+        # we log in console error messages, may be useful
+        if level == "error":
+            log.error(message)
+        elif level == "warning":
+            log.warning(message)
+        self.counter = delay
+        notif_elt = self._tpl.get_elt({
+            "message": message,
+            "level": level,
+        })
+        self.update_counter(notif_elt)
+        document["notifs_area"] <= notif_elt
+        timer.set_timeout(lambda: notif_elt.classList.add('state_appended'), 0)
+        self.timer = timer.set_interval(self.update_counter, 1000, notif_elt)
+        for elt in notif_elt.select('.click_to_retry'):
+            elt.bind('click', lambda __: self.retry(notif_elt))
+
+
+
+
+notification = Notification()