[web] Make button "Delete all" remove only orders from current se… (#49)

- Make button "Delete all" remove only orders from current selected power.
- Reorganize code
- [web] Remove bugged and useless function gameReloaded() from game page.
- This function caused error `engine.getPhaseType is not a function` for
  games with deadlines.
- Move function saveGameToDisk into its own file.
- [web] Add documentation to methods involved in orders management to help understand what happens.
- Move methods getServerOrders() from game GUI component to game engine object.
- Rename method onSetNoOrders to onSetEmptyOrdersSet.
- Rename property in PowerActionsForm: onNoOrders => onPass.
- [web] Update sending orders to send request clearOrders when local orders list is null.

- Renamed local file:
  - components/power_order => power_orders
  - forms/power_actions_form => power_order_creation_form

- Move power orders buttons bar to a separate file:
  - components/power_orders_actions_bar

- [web] Improve messages about local/server defined orders.

1 files changed, 18 insertions, 0 deletions

diff --git a/diplomacy/web/src/gui/utils/saveGameToDisk.js b/diplomacy/web/src/gui/utils/saveGameToDisk.js
new file mode 100644
index 0000000..aae69a4
--- /dev/null
+++ b/diplomacy/web/src/gui/utils/saveGameToDisk.js
@@ -0,0 +1,18 @@
+export function saveGameToDisk(game, onError) {
+    if (game.client) {
+        game.client.save()
+            .then((savedData) => {
+                const domLink = document.createElement('a');
+                domLink.setAttribute(
+                    'href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(JSON.stringify(savedData)));
+                domLink.setAttribute('download', `${game.game_id}.json`);
+                domLink.style.display = 'none';
+                document.body.appendChild(domLink);
+                domLink.click();
+                document.body.removeChild(domLink);
+            })
+            .catch(exc => onError(`Error while saving game: ${exc.toString()}`));
+    } else {
+        onError(`Cannot save this game.`);
+    }
+}