protocol:

	split to multiple proto files

9 files changed, 459 insertions, 303 deletions

diff --git a/protocol/auth.proto b/protocol/auth.proto
new file mode 100644
index 0000000..a39d2ad
--- /dev/null
+++ b/protocol/auth.proto
@@ -0,0 +1,38 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+enum PASSWD_HASH_TYPE {
+	HASH_NONE = 0;
+	HASH_MD5 = 1;
+	HASH_SHA2 = 2;
+	HASH_SHA512 = 3;
+}
+
+message client_auth_request {
+	required bytes password = 1;
+	optional PASSWD_HASH_TYPE hash_type = 2 [default = HASH_NONE];
+}
+
+message server_auth_reply {
+	required bool status = 1; //true == success, false == error
+	optional string auth_token = 2; //must be set if no error
+	optional string error_description = 3; //readable description must be set on error
+}
+
diff --git a/protocol/core.proto b/protocol/core.proto
new file mode 100644
index 0000000..53f887a
--- /dev/null
+++ b/protocol/core.proto
@@ -0,0 +1,29 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+import "settings.proto";
+
+message core_info //core info for client currently for editable server settings, server version and proto version only
+{
+	optional int32 proto_version = 1 [default = 1];
+	required int32 version = 2;
+	repeated setting settings = 3;
+}
+
diff --git a/protocol/download.proto b/protocol/download.proto
new file mode 100644
index 0000000..d40ecb9
--- /dev/null
+++ b/protocol/download.proto
@@ -0,0 +1,82 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+import "misc.proto";
+
+message client_download_add_request {
+	required string module_name = 1;
+	repeated int_string_pair params = 2;
+}
+
+message client_download_start_request {
+	required int32 download_id = 1;
+}
+
+message client_download_stop_request {
+	required int32 download_id = 1;
+}
+
+message client_download_delete_request {
+	required int32 download_id = 1;
+	optional bool with_data = 2 [default = false];
+}
+
+message client_download_action_request {
+	required int32 download_id = 1;
+	required int32 action_id = 2;
+}
+
+message client_downloads_request {
+	repeated int_string_pair params = 1;
+}
+
+message client_download_request {
+	required int32 download_id = 1;
+	repeated int_string_pair params = 2;
+}
+
+
+enum DOWNLOAD_CONTENT_ENTRY_TYPE {
+	DOWNLOAD_CONTENT_ENTRY_TYPE_FILE = 0;
+	DOWNLOAD_CONTENT_ENTRY_TYPE_DIRECTORY = 1;
+}
+
+message download_content_entry {
+	required string name = 1;
+	optional DOWNLOAD_CONTENT_ENTRY_TYPE type = 2 [default = DOWNLOAD_CONTENT_ENTRY_TYPE_FILE];
+	repeated download_content_entry children = 3;
+	optional int64 size = 4 [default = 0];
+	optional int64 downloaded = 5 [default = 0];
+}
+
+
+message download {
+	required int32 id = 1;
+	required string name = 2;
+	required string module_name = 3;
+	optional download_content_entry content = 4;
+	required int64 size = 5;
+	required int64 downloaded = 6;
+	required int32 state = 7; //download state as defined in api_module_downloader.h, or module defined state
+}
+
+message server_download_reply {
+	required download download = 1;
+}
diff --git a/protocol/events.proto b/protocol/events.proto
new file mode 100644
index 0000000..f543577
--- /dev/null
+++ b/protocol/events.proto
@@ -0,0 +1,107 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+import "ui.proto";
+
+//TODO: extended ui updates subscriptions proto part (ui data messages on timer, e.t.c.)
+
+// event subscription part begin
+
+//TODO: rework
+//TODO: download state chage events
+
+
+message subscription_download_ui_info {
+	optional client_download_ui_data_request download_ui_data = 1;
+	optional bool one_shot = 3 [default = false];
+	required int64 interval = 4;
+}
+
+
+message unsubscription_download_ui_info {
+	required int32 id = 1; //ui element id
+}
+
+
+//subscription type
+enum SUBSCRIPTION_TYPE {
+	S_UI_CHANGE = 0;
+	S_SETTING_CHANGE = 1;
+	S_DOWNLOAD_STATE_CHANGE = 2;
+	S_DOWNLOAD_ADDED = 3;
+	S_DOWNLOAD_DELETED = 4;
+}
+
+//download state subscription for download state changes (can be module defined)
+enum SUBSCRIPTION_DOWNLOAD_STATE {
+	S_D_STARTED = 0;
+	S_D_STOPPED = 1;
+}
+
+message subscription_download_state_change {
+	repeated SUBSCRIPTION_DOWNLOAD_STATE states = 1;
+}
+
+//information about subscription request
+message client_event_subscription_request {
+	required SUBSCRIPTION_TYPE type = 1; //type must be set
+	required string module_name = 2; //module name must be set, can be "" for all installed modules supported subscription type
+	optional subscription_download_ui_info download_ui_info = 3;
+	optional subscription_download_state_change download_state_change = 4;
+}
+
+
+//unsubscript from events of specified type
+//here is two variants of unsubscription
+
+//1. can be customized to unsubscript from few aubscriptions at once
+message client_event_unsubscription_request {
+	required SUBSCRIPTION_TYPE type = 1;
+	required string module_name = 2;
+	optional unsubscription_download_ui_info ui_info = 3;
+	optional subscription_download_state_change download_state_change = 4; //reusing defined structure to avoid code duplication
+}
+
+//2. unsubscript by id given in "server_event_subscription_reply"
+message client_event_unsubscription_by_id_request {
+	required int32 subscription_id = 1;
+}
+
+message server_event_subscription_reply {
+	required SUBSCRIPTION_TYPE type = 1;
+	required string module_name = 2;
+	optional subscription_download_ui_info ui_info = 3;
+
+	required bool status = 1000;
+	optional string status_description = 1001;
+	optional int32 subscription_id = 1002 [default = -1];
+}
+
+message server_event_unsubscription_reply {
+	required SUBSCRIPTION_TYPE type = 1;
+	required string module_name = 2;
+	optional unsubscription_download_ui_info ui_info = 3;
+
+	required bool status = 1000;
+	optional string status_description = 1001;
+	optional int32 subscription_id = 1002;
+}
+
+//event subscription part end
diff --git a/protocol/misc.proto b/protocol/misc.proto
new file mode 100644
index 0000000..152c7f5
--- /dev/null
+++ b/protocol/misc.proto
@@ -0,0 +1,31 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+message int_string_pair {
+	required int32 id = 1;
+	required string value = 2;
+}
+
+message string_pair
+{
+	required string name = 1;
+	required string value = 2;
+}
diff --git a/protocol/module.proto b/protocol/module.proto
new file mode 100644
index 0000000..2376b7b
--- /dev/null
+++ b/protocol/module.proto
@@ -0,0 +1,47 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+import "settings.proto";
+import "ui.proto";
+import "misc.proto";
+
+enum SERVER_MODULE_TYPE {
+	SERVER_MODULE_DOWNLOADER = 0;
+	SERVER_MODULE_METADATA_STORAGE = 1;
+}
+
+
+
+message module_info //general module info for client including settings, download info ui and module specific menus
+{
+	required SERVER_MODULE_TYPE type = 1;
+	required string name = 2; //unique (used as module id)
+	required string version = 3;
+	optional string description = 4 [default = "no description specified"];
+	repeated setting settings = 5;
+	repeated module_download_ui_element_info download_info_ui = 6; //module defined download info ui, always complete here
+	repeated module_download_ui_element_info download_creation_ui = 7; //module defined download creation ui, always complete here
+	repeated module_download_menu_element_info download_menu = 8; //module defined download menu info, may not present
+	repeated module_download_menu_element_info download_content_menu = 9; //menu for files and folders inside download root, may not present
+	repeated string_pair get_downloads_parameters_info = 10; //info about additional parameters which may be passed to api_module_downloader::get_download, api_module_downloader::get_downloads
+	repeated int_string_pair download_state_name = 11; //module defined download states description, we have a few hardcoded states necessary for every downloader: 0 = stopped, 1 = running, ...
+}
+
+
diff --git a/protocol/settings.proto b/protocol/settings.proto
new file mode 100644
index 0000000..ff0e9a3
--- /dev/null
+++ b/protocol/settings.proto
@@ -0,0 +1,43 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+//TODO: settings:
+// children ?
+// groups ?
+
+//settings common proto part begin
+
+message setting_info {
+	optional string default_value = 1 [default = "empty"];
+	optional string minimal_value = 2 [default = "not set"];
+	optional string maximal_value = 3 [default = "not set"];
+	optional string description = 4;
+	repeated string dependencies = 5; //list containing all settings which must be turned on for this setting
+	repeated string blockers = 6; //list of settings which must be turned of for this setting
+}
+
+message setting {
+	required string name = 1 [default = "not set"]; //should be unique for every loaded module
+	optional setting_info info = 2;
+	optional string value = 3 [default = "empty"];
+}
+
+
+//settings common proto part end
diff --git a/protocol/udm.proto b/protocol/udm.proto
index d792a22..4b0fa34 100644
--- a/protocol/udm.proto
+++ b/protocol/udm.proto
@@ -18,312 +18,17 @@
 
 */
 
-
 //TODO: write readable proto description
 
-//ui common proto part begin
-
-enum MODULE_UI_ELEMENT_TYPE {
-	UI_EMPTY = 0; //helper type to set empty element
-	UI_STR = 1; //ui elements containing strings
-	UI_INTEGER = 2; //numeric only ui elements (use strings instead ?)
-	UI_PROGRESS_BAR = 3; //generic progress bar
-	UI_WINDOW = 4; //ui window ...
-	UI_GROUP = 5; //empty ui element to group children together in ui (tabs can be implemented using this type)
-}
-
-message module_download_ui_element_info {
-	optional MODULE_UI_ELEMENT_TYPE type = 1 [default = UI_EMPTY];
-	required int32 id = 2; //internal element id used to get element value (should be unique for every loaded module)
-	optional string name = 3 [default = "not set"]; //can be non unique
-	optional string description = 4;
-	optional bool data_required = 5 [default = false]; //ui element may required data specified (used in download creation ui)
-	repeated module_download_ui_element_info children = 6;
-}
-
-
-message module_download_menu_element_info {
-	required int32 id = 1;
-	required string name = 2;
-	optional string description = 3;
-	optional bool data_required = 4 [default = false];
-	repeated module_download_menu_element_info children = 5; //element with children cannot be executed, it's just container
-}
-
-
-message module_download_ui_element_data {
-	required int32 ui_id = 1; //should be unique for every loaded module
-	required string data = 2;
-}
-
-message module_download_ui_data {
-	repeated module_download_ui_element_data data = 1;
-	required string download_id = 2;
-}
-
-message server_download_ui_data_reply {
-	required string module_name = 1;
-	required module_download_ui_data data = 2;
-}
-
-message client_download_ui_data_request {
-	required string module_name = 1;
-	required string download_id = 2;
-	repeated int32 ui_id = 3; //should be unique for for every loaded module
-}
-
-
-//ui common proto part end
-
-//TODO: extended ui updates subscriptions proto part (ui data messages on timer, e.t.c.)
-
-// event subscription part begin
-
-//TODO: rework
-//TODO: download state chage events
-
-
-message subscription_download_ui_info {
-	optional client_download_ui_data_request download_ui_data = 1;
-	optional bool one_shot = 3 [default = false];
-	required int64 interval = 4;
-}
-
-
-message unsubscription_download_ui_info {
-	required int32 id = 1; //ui element id
-}
-
-
-//subscription type
-enum SUBSCRIPTION_TYPE {
-	S_UI_CHANGE = 0;
-	S_SETTING_CHANGE = 1;
-	S_DOWNLOAD_STATE_CHANGE = 2;
-	S_DOWNLOAD_ADDED = 3;
-	S_DOWNLOAD_DELETED = 4;
-}
-
-//download state subscription for download state changes (can be module defined)
-enum SUBSCRIPTION_DOWNLOAD_STATE {
-	S_D_STARTED = 0;
-	S_D_STOPPED = 1;
-}
-
-message subscription_download_state_change {
-	repeated SUBSCRIPTION_DOWNLOAD_STATE states = 1;
-}
-
-//information about subscription request
-message client_event_subscription_request {
-	required SUBSCRIPTION_TYPE type = 1; //type must be set
-	required string module_name = 2; //module name must be set, can be "" for all installed modules supported subscription type
-	optional subscription_download_ui_info download_ui_info = 3;
-	optional subscription_download_state_change download_state_change = 4;
-}
-
-
-//unsubscript from events of specified type
-//here is two variants of unsubscription
-
-//1. can be customized to unsubscript from few aubscriptions at once
-message client_event_unsubscription_request {
-	required SUBSCRIPTION_TYPE type = 1;
-	required string module_name = 2;
-	optional unsubscription_download_ui_info ui_info = 3;
-	optional subscription_download_state_change download_state_change = 4; //reusing defined structure to avoid code duplication
-}
-
-//2. unsubscript by id given in "server_event_subscription_reply"
-message client_event_unsubscription_by_id_request {
-	required int32 subscription_id = 1;
-}
-
-message server_event_subscription_reply {
-	required SUBSCRIPTION_TYPE type = 1;
-	required string module_name = 2;
-	optional subscription_download_ui_info ui_info = 3;
-
-	required bool status = 1000;
-	optional string status_description = 1001;
-	optional int32 subscription_id = 1002 [default = -1];
-}
-
-message server_event_unsubscription_reply {
-	required SUBSCRIPTION_TYPE type = 1;
-	required string module_name = 2;
-	optional unsubscription_download_ui_info ui_info = 3;
-
-	required bool status = 1000;
-	optional string status_description = 1001;
-	optional int32 subscription_id = 1002;
-}
-
-//event subscription part end
-
-
-
-//dowloads proto part begin
-
-message client_download_add_request {
-	required string module_name = 1;
-	repeated int_string_pair params = 2;
-}
-
-message client_download_start_request {
-	required int32 download_id = 1;
-}
-
-message client_download_stop_request {
-	required int32 download_id = 1;
-}
-
-message client_download_delete_request {
-	required int32 download_id = 1;
-	optional bool with_data = 2 [default = false];
-}
-
-message client_download_action_request {
-	required int32 download_id = 1;
-	required int32 action_id = 2;
-}
-
-message int_string_pair {
-	required int32 id = 1;
-	required string value = 2;
-}
-message client_downloads_request {
-	repeated int_string_pair params = 1;
-}
-
-message client_download_request {
-	required int32 download_id = 1;
-	repeated int_string_pair params = 2;
-}
-
-
-enum DOWNLOAD_CONTENT_ENTRY_TYPE {
-	DOWNLOAD_CONTENT_ENTRY_TYPE_FILE = 0;
-	DOWNLOAD_CONTENT_ENTRY_TYPE_DIRECTORY = 1;
-}
-
-message download_content_entry {
-	required string name = 1;
-	optional DOWNLOAD_CONTENT_ENTRY_TYPE type = 2 [default = DOWNLOAD_CONTENT_ENTRY_TYPE_FILE];
-	repeated download_content_entry children = 3;
-	optional int64 size = 4 [default = 0];
-	optional int64 downloaded = 5 [default = 0];
-}
-
-
-message download {
-	required int32 id = 1;
-	required string name = 2;
-	required string module_name = 3;
-	optional download_content_entry content = 4;
-	required int64 size = 5;
-	required int64 downloaded = 6;
-	required int32 state = 7; //download state as defined in api_module_downloader.h, or module defined state
-}
-
-message server_download_reply {
-	required download download = 1;
-}
-
-
-//downloads proto part end
-
-
-
-//TODO: settings:
-// children ?
-// groups ?
-
-//settings common proto part begin
-
-message setting_info {
-	optional string default_value = 1 [default = "empty"];
-	optional string minimal_value = 2 [default = "not set"];
-	optional string maximal_value = 3 [default = "not set"];
-	optional string description = 4;
-	repeated string dependencies = 5; //list containing all settings which must be turned on for this setting
-	repeated string blockers = 6; //list of settings which must be turned of for this setting
-}
-
-message setting {
-	required string name = 1 [default = "not set"]; //should be unique for every loaded module
-	optional setting_info info = 2;
-	optional string value = 3 [default = "empty"];
-}
-
-
-//settings common proto part end
-
-
-//module related messages begin
-
-enum SERVER_MODULE_TYPE {
-	SERVER_MODULE_DOWNLOADER = 0;
-	SERVER_MODULE_METADATA_STORAGE = 1;
-}
-
-message string_pair
-{
-	required string name = 1;
-	required string value = 2;
-}
-
-
-message module_info //general module info for client including settings, download info ui and module specific menus
-{
-	required SERVER_MODULE_TYPE type = 1;
-	required string name = 2; //unique (used as module id)
-	required string version = 3;
-	optional string description = 4 [default = "no description specified"];
-	repeated setting settings = 5;
-	repeated module_download_ui_element_info download_info_ui = 6; //module defined download info ui, always complete here
-	repeated module_download_ui_element_info download_creation_ui = 7; //module defined download creation ui, always complete here
-	repeated module_download_menu_element_info download_menu = 8; //module defined download menu info, may not present
-	repeated module_download_menu_element_info download_content_menu = 9; //menu for files and folders inside download root, may not present
-	repeated string_pair get_downloads_parameters_info = 10; //info about additional parameters which may be passed to api_module_downloader::get_download, api_module_downloader::get_downloads
-	repeated int_string_pair download_state_name = 11; //module defined download states description, we have a few hardcoded states necessary for every downloader: 0 = stopped, 1 = running, ...
-}
-
-//module related messages end
-
-//core related messages begin
-
-message core_info //core info for client currently for editable server settings, server version and proto version only
-{
-	optional int32 proto_version = 1 [default = 1];
-	required int32 version = 2;
-	repeated setting settings = 3;
-}
-
-//core related messages end
-
-
-//auth proto part begin
-
-enum PASSWD_HASH_TYPE {
-	HASH_NONE = 0;
-	HASH_MD5 = 1;
-	HASH_SHA2 = 2;
-	HASH_SHA512 = 3;
-}
-
-message client_auth_request {
-	required bytes password = 1;
-	optional PASSWD_HASH_TYPE hash_type = 2 [default = HASH_NONE];
-}
-
-message server_auth_reply {
-	required bool status = 1; //true == success, false == error
-	optional string auth_token = 2; //must be set if no error
-	optional string error_description = 3; //readable description must be set on error
-}
+import "ui.proto";
+import "events.proto";
+import "download.proto";
+import "misc.proto";
+import "settings.proto";
+import "module.proto";
+import "auth.proto";
+import "core.proto";
 
-//auth proto part end
 
 //TODO: large datatransfer proto part
 // it should be in separate connection
diff --git a/protocol/ui.proto b/protocol/ui.proto
new file mode 100644
index 0000000..387e17c
--- /dev/null
+++ b/protocol/ui.proto
@@ -0,0 +1,74 @@
+/*
+	Copyright © 2015 Gluzskiy Alexandr (sss)
+
+    This file is part of Unknown Download Manager (UDM).
+
+    UDM is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    UDM is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with UDM.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+//ui common proto part begin
+
+enum MODULE_UI_ELEMENT_TYPE {
+	UI_EMPTY = 0; //helper type to set empty element
+	UI_STR = 1; //ui elements containing strings
+	UI_INTEGER = 2; //numeric only ui elements (use strings instead ?)
+	UI_PROGRESS_BAR = 3; //generic progress bar
+	UI_WINDOW = 4; //ui window ...
+	UI_GROUP = 5; //empty ui element to group children together in ui (tabs can be implemented using this type)
+}
+
+message module_download_ui_element_info {
+	optional MODULE_UI_ELEMENT_TYPE type = 1 [default = UI_EMPTY];
+	required int32 id = 2; //internal element id used to get element value (should be unique for every loaded module)
+	optional string name = 3 [default = "not set"]; //can be non unique
+	optional string description = 4;
+	optional bool data_required = 5 [default = false]; //ui element may required data specified (used in download creation ui)
+	repeated module_download_ui_element_info children = 6;
+}
+
+
+message module_download_menu_element_info {
+	required int32 id = 1;
+	required string name = 2;
+	optional string description = 3;
+	optional bool data_required = 4 [default = false];
+	repeated module_download_menu_element_info children = 5; //element with children cannot be executed, it's just container
+}
+
+
+message module_download_ui_element_data {
+	required int32 ui_id = 1; //should be unique for every loaded module
+	required string data = 2;
+}
+
+message module_download_ui_data {
+	repeated module_download_ui_element_data data = 1;
+	required string download_id = 2;
+}
+
+message server_download_ui_data_reply {
+	required string module_name = 1;
+	required module_download_ui_data data = 2;
+}
+
+message client_download_ui_data_request {
+	required string module_name = 1;
+	required string download_id = 2;
+	repeated int32 ui_id = 3; //should be unique for for every loaded module
+}
+
+
+//ui common proto part end
+