feat: Would you like to read the downloaded book for OPDS (#2370)

frontend/apps/opdscatalog/opdscatalog.lua

@@ -6,6 +6,9 @@ local Screen = require("device").screen
 local DEBUG = require("dbg")
 local _ = require("gettext")
 local Blitbuffer = require("ffi/blitbuffer")
+local ReaderUI = require("apps/reader/readerui")
+local ConfirmBox = require("ui/widget/confirmbox")
+local T = require("ffi/util").template
 
 local OPDSCatalog = InputContainer:extend{
     title = _("OPDS Catalog"),
@@ -43,6 +46,16 @@ function OPDSCatalog:init()
         is_borderless = true,
         has_close_button = true,
         close_callback = function() return self:onClose() end,
+        file_downloaded_callback = function(downloaded_file)
+            UIManager:show(ConfirmBox:new{
+                text = T(_("File saved to:\n %1\nWould you like to read the downloaded book now?"),
+                    downloaded_file),
+                ok_callback = function()
+                    self:onClose()
+                    ReaderUI:showReader(downloaded_file)
+                end
+            })
+        end,
     }
 
     self[1] = FrameContainer:new{

frontend/ui/widget/opdsbrowser.lua

@@ -479,10 +479,9 @@ function OPDSBrowser:downloadFile(item, format, remote_url)
 
     if c == 200 then
         DEBUG("file downloaded to", local_path)
-        UIManager:show(InfoMessage:new{
-            text = _("File saved to:\n") .. local_path,
-            timeout = 3,
-        })
+        if self.file_downloaded_callback then
+            self.file_downloaded_callback(local_path)
+        end
     else
         DEBUG("response", {r, c, h})
         UIManager:show(InfoMessage:new{
@@ -514,7 +513,7 @@ function OPDSBrowser:showDownloads(item)
                         UIManager:close(self.download_dialog)
                         UIManager:show(InfoMessage:new{
                             text = _("Downloading may take several minutes…"),
-                            timeout = 3,
+                            timeout = 1,
                         })
                     end
                     table.insert(line, button)