Cloudstorage - Add option to view unsupported files (#5131)

Option to show all files in cloudstorage also not supported by KOReader. We can also download any file.
To show all files in CS we need to enable option Show unsupported files in file manager (introducing in #5129)
Close: #5006

frontend/apps/cloudstorage/dropbox.lua

@@ -17,14 +17,20 @@ end
 function DropBox:downloadFile(item, password, path, close)
     local code_response = DropBoxApi:downloadFile(item.url, password, path)
     if code_response == 200 then
-        UIManager:show(ConfirmBox:new{
-            text = T(_("File saved to:\n %1\nWould you like to read the downloaded book now?"),
-                path),
-            ok_callback = function()
-                close()
-                ReaderUI:showReader(path)
-            end
-        })
+        if G_reader_settings:isTrue("show_unsupported") then
+            UIManager:show(InfoMessage:new{
+                text = T(_("File saved to:\n%1"), path),
+            })
+        else
+            UIManager:show(ConfirmBox:new{
+                text = T(_("File saved to:\n %1\nWould you like to read the downloaded book now?"),
+                    path),
+                ok_callback = function()
+                    close()
+                    ReaderUI:showReader(path)
+                end
+            })
+        end
     else
         UIManager:show(InfoMessage:new{
             text = T(_("Could not save file to:\n%1"), path),

frontend/apps/cloudstorage/dropboxapi.lua

@@ -107,7 +107,8 @@ function DropBoxApi:listFolder(path, token)
                 type = tag,
             })
         --show only file with supported formats
-        elseif tag == "file" and DocumentRegistry:hasProvider(text) then
+        elseif tag == "file" and (DocumentRegistry:hasProvider(text)
+            or G_reader_settings:isTrue("show_unsupported")) then
             table.insert(dropbox_file, {
                 text = text,
                 url = files.path_display,

frontend/apps/cloudstorage/ftp.lua

@@ -26,14 +26,20 @@ function Ftp:downloadFile(item, address, user, pass, path, close)
         local file = io.open(path, "w")
         file:write(response)
         file:close()
-        UIManager:show(ConfirmBox:new{
-            text = T(_("File saved to:\n %1\nWould you like to read the downloaded book now?"),
-                path),
-            ok_callback = function()
-                close()
-                ReaderUI:showReader(path)
-            end
-        })
+        if G_reader_settings:isTrue("show_unsupported") then
+            UIManager:show(InfoMessage:new{
+                text = T(_("File saved to:\n%1"), path),
+            })
+        else
+            UIManager:show(ConfirmBox:new{
+                text = T(_("File saved to:\n %1\nWould you like to read the downloaded book now?"),
+                    path),
+                ok_callback = function()
+                    close()
+                    ReaderUI:showReader(path)
+                end
+            })
+        end
     else
         UIManager:show(InfoMessage:new{
             text = T(_("Could not save file to:\n%1"), path),

frontend/apps/cloudstorage/ftpapi.lua

@@ -54,7 +54,8 @@ function FtpApi:listFolder(address_path, folder_path)
                     type = type,
                 })
             --show only file with supported formats
-            elseif extension  and DocumentRegistry:hasProvider(item) then
+            elseif extension  and (DocumentRegistry:hasProvider(item)
+                or G_reader_settings:isTrue("show_unsupported")) then
                 type = "file"
                 table.insert(ftp_file, {
                     text = file_name,

frontend/apps/cloudstorage/webdav.lua

@@ -17,14 +17,20 @@ end
 function WebDav:downloadFile(item, address, username, password, local_path, close)
     local code_response = WebDavApi:downloadFile(address .. WebDavApi:urlEncode( item.url ), username, password, local_path)
     if code_response == 200 then
-        UIManager:show(ConfirmBox:new{
-            text = T(_("File saved to:\n%1\nWould you like to read the downloaded book now?"),
-                local_path),
-            ok_callback = function()
-                close()
-                ReaderUI:showReader(local_path)
-            end
-        })
+        if G_reader_settings:isTrue("show_unsupported") then
+            UIManager:show(InfoMessage:new{
+                text = T(_("File saved to:\n%1"), local_path),
+            })
+        else
+            UIManager:show(ConfirmBox:new{
+                text = T(_("File saved to:\n%1\nWould you like to read the downloaded book now?"),
+                    local_path),
+                ok_callback = function()
+                    close()
+                    ReaderUI:showReader(local_path)
+                end
+            })
+        end
     else
         UIManager:show(InfoMessage:new{
             text = T(_("Could not save file to:\n%1"), local_path),

frontend/apps/cloudstorage/webdavapi.lua

@@ -114,7 +114,8 @@ function WebDavApi:listFolder(address, user, pass, folder_path)
                         type = "folder",
                     })
                 end
-            elseif item:find("<d:resourcetype/>") and DocumentRegistry:hasProvider(item_name) then
+            elseif item:find("<d:resourcetype/>") and (DocumentRegistry:hasProvider(item_name)
+                or G_reader_settings:isTrue("show_unsupported")) then
                 table.insert(webdav_file, {
                     text = item_name,
                     url = util.urlDecode( item_path ),