fixed pocket main thread crash on nil current page, added info page to alarm test app

pocket/pocket.lua

@@ -150,7 +150,7 @@ function pocket.init_nav(smem)
         ---@class pocket_app
         local app = {
             loaded = false,
-            cur_page = nil,    ---@type nav_tree_page
+            cur_page = nil,    ---@type nav_tree_page|nil
             pane = pane,
             paned_pages = {},  ---@type nav_tree_page[]
             sidebar_items = {} ---@type sidebar_entry[]
@@ -348,7 +348,7 @@ function pocket.init_nav(smem)
     function nav.get_containers() return self.containers end
 
     -- get the currently active page
-    ---@return nav_tree_page
+    ---@return nav_tree_page|nil
     function nav.get_current_page()
         return self.apps[self.cur_app].get_current_page()
     end

pocket/startup.lua

@@ -22,7 +22,7 @@ local pocket    = require("pocket.pocket")
 local renderer  = require("pocket.renderer")
 local threads   = require("pocket.threads")
 
-local POCKET_VERSION = "v1.0.0"
+local POCKET_VERSION = "v1.0.1"
 
 local println = util.println
 local println_ts = util.println_ts

pocket/threads.lua

@@ -58,8 +58,10 @@ function threads.thread__main(smem)
                     pocket_comms.link_update()
 
                     -- update any tasks for the active page
+                    if nav.get_current_page() then
                         local page_tasks = nav.get_current_page().tasks
                         for i = 1, #page_tasks do page_tasks[i]() end
+                    end
 
                     loop_clock.start()
                 elseif sv_wd.is_timer(param1) then

pocket/ui/apps/alarm.lua

@@ -155,14 +155,27 @@ local function new_view(root)
 
     --#endregion
 
+    --#region info page
+
+    app.new_page(nil, 3)
+
+    local info_div = Div{parent=page_div}
+
+    TextBox{parent=info_div,x=2,y=1,text="This app provides tools to test alarm sounds by alarm and by tone (1-8)."}
+    TextBox{parent=info_div,x=2,y=6,text="The system must be idle (all units stopped with no alarms active) for testing to run."}
+    TextBox{parent=info_div,x=2,y=12,text="Currently, testing will be denied unless you have a Facility Authentication Key set (this will change in the future)."}
+
+    --#endregion
+
     -- setup multipane
-    local u_pane = MultiPane{parent=page_div,x=1,y=1,panes={alarms_div,tones_div}}
+    local u_pane = MultiPane{parent=page_div,x=1,y=1,panes={alarms_div,tones_div,info_div}}
     app.set_root_pane(u_pane)
 
     local list = {
         { label = " # ", tall = true, color = core.cpair(colors.black, colors.green), callback = db.nav.go_home },
         { label = " \x13 ", color = core.cpair(colors.black, colors.red), callback = function () app.switcher(1) end },
-        { label = " \x0f ", color = core.cpair(colors.black, colors.yellow), callback = function () app.switcher(2) end }
+        { label = " \x0f ", color = core.cpair(colors.black, colors.yellow), callback = function () app.switcher(2) end },
+        { label = " ? ", color = core.cpair(colors.black, colors.blue), callback = function () app.switcher(3) end }
     }
 
     app.set_sidebar(list)