# HG changeset patch
# User Goffi <goffi@goffi.org>
# Date 1592578071 -7200
# Node ID 63328c793a9ebc57450d13062a986f686a0c2dfd
# Parent  37a582b0fe535df544b3a806d8440ea3f6433beb
pages: new method `exposeToScripts` to make variables accessible to scripts in browser

diff -r 37a582b0fe53 -r 63328c793a9e libervia/server/pages.py
--- a/libervia/server/pages.py	Fri Jun 19 16:47:51 2020 +0200
+++ b/libervia/server/pages.py	Fri Jun 19 16:47:51 2020 +0200
@@ -45,10 +45,11 @@
 from sat.core.log import getLogger
 from sat_frontends.bridge.bridge_frontend import BridgeException
 
-from libervia.server.constants import Const as C
-from libervia.server import session_iface
-from libervia.server.utils import quote, SubPage
-from libervia.server.classes import WebsocketMeta
+from .constants import Const as C
+from . import session_iface
+from .utils import quote, SubPage
+from .classes import WebsocketMeta
+from .classes import Script
 
 log = getLogger(__name__)
 
@@ -541,6 +542,20 @@
             )
             self.pageError(request, C.HTTP_FORBIDDEN)
 
+    def exposeToScripts(
+        self,
+        request: server.Request,
+        **kwargs: str
+    ) -> None:
+        """Make a local variable available to page script as a global variable
+
+        No check is done for conflicting name, use this carefully
+        """
+        template_data = request.template_data
+        scripts = template_data.setdefault("scripts", utils.OrderedSet())
+        for name, value in kwargs.items():
+            scripts.add(Script(content=f"var {name}={value!r};"))
+
     def registerURI(self, uri_tuple, get_uri_cb):
         """Register a URI handler