implement the ForceUnspam sieve action

dev/Sieve/Commands.js

@@ -11,7 +11,8 @@ import {
 	DiscardCommand,
 	FileIntoCommand,
 	KeepCommand,
-	RedirectCommand
+	RedirectCommand,
+	ForceUnspamCommand
 } from 'Sieve/Commands/Actions';
 
 import {
@@ -75,6 +76,7 @@ export const
 		FileIntoCommand,
 		KeepCommand,
 		RedirectCommand,
+		ForceUnspamCommand,
 		// Test commands
 		AddressTest,
 		AllOfTest,

dev/Sieve/Commands/Actions.js

@@ -109,3 +109,10 @@ export class KeepCommand extends ActionCommand
 export class DiscardCommand extends ActionCommand
 {
 }
+
+/**
+ * https://tools.ietf.org/html/rfc5228#section-4.4
+ */
+export class ForceUnspamCommand extends ActionCommand
+{
+}

dev/Sieve/Model/Filter.js

@@ -16,7 +16,8 @@ export const FilterAction = {
 	Discard: 'Discard',
 	Vacation: 'Vacation',
 	Reject: 'Reject',
-	Forward: 'Forward'
+	Forward: 'Forward',
+	ForceUnspam: 'ForceUnspam'
 };
 
 /**
@@ -93,6 +94,9 @@ export class FilterModel extends AbstractModel {
 					case FilterAction.Discard:
 						result = rl.i18n(root + 'DISCARD');
 						break;
+					case FilterAction.ForceUnspam:
+						result = rl.i18n(root + 'FORCE_UNSPAM');
+						break;
 					// no default
 				}
 
@@ -112,6 +116,8 @@ export class FilterModel extends AbstractModel {
 						return result + 'None';
 					case FilterAction.Discard:
 						return result + 'Discard';
+					case FilterAction.ForceUnspam:
+						return result + 'ForceUnspam';
 					case FilterAction.MoveTo:
 					default:
 						return result + 'MoveToFolder';

dev/Sieve/Model/Script.js

@@ -139,6 +139,10 @@ function filtersToSieveScript(filters)
 			case 'Discard':
 				result.push(sTab + 'discard;');
 				break;
+			case 'ForceUnspam':
+					require.fileinto = 1;
+					result.push(sTab + 'fileinto "INBOX";');
+				break;
 			case 'Vacation':
 				if (value) {
 					require.vacation = 1;

dev/Sieve/View/Filter.js

@@ -150,6 +150,8 @@ export class FilterPopupView extends rl.pluginPopupView {
 
 		this.actionTypeOptions.push({ id: FilterAction.Discard, name: i18nFilter('ACTION_DISCARD') });
 
+		this.actionTypeOptions.push({ id: FilterAction.ForceUnspam, name: i18nFilter('FORCE_UNSPAM') });
+
 		this.typeOptionsSize([
 			{ id: FilterConditionType.Over, name: i18nFilter('TYPE_OVER') },
 			{ id: FilterConditionType.Under, name: i18nFilter('TYPE_UNDER') }