Support Sieve RFC3894

dev/Sieve/Commands.js

@@ -2,6 +2,8 @@
  * https://tools.ietf.org/html/rfc5228#section-2.9
  */
 
+import { capa } from 'Sieve/Utils';
+
 import {
 	GrammarCommand,
 	GrammarString,
@@ -102,11 +104,13 @@ export class FileIntoCommand extends GrammarCommand
 
 	toString()
 	{
+		return 'fileinto '
 			// https://datatracker.ietf.org/doc/html/rfc3894
-		// :copy
+			+ ((this.copy && capa.includes('copy')) ? ':copy ' : '')
 			// https://datatracker.ietf.org/doc/html/rfc5490#section-3.2
-		// :create
+			+ ((this.create && capa.includes('mailbox')) ? ':create ' : '')
-		return 'fileinto ' + this._mailbox + ';';
+			+ this._mailbox
+			+ ';';
 	}
 
 	get mailbox()
@@ -141,9 +145,11 @@ export class RedirectCommand extends GrammarCommand
 
 	toString()
 	{
+		return 'redirect '
 			// https://datatracker.ietf.org/doc/html/rfc3894
-		// :copy
+			+ ((this.copy && capa.includes('copy')) ? ':copy ' : '')
-		return 'redirect ' + this._address + ';';
+			+ this._address
+			+ ';';
 	}
 
 	get address()

dev/Sieve/Parser.js

@@ -2,6 +2,8 @@
  * https://tools.ietf.org/html/rfc5228#section-8
  */
 
+import { capa, forEachObjectEntry } from 'Sieve/Utils';
+
 import {
 	BRACKET_COMMENT,
 	HASH_COMMENT,
@@ -84,7 +86,7 @@ import {
 } from 'Sieve/Extensions/rfc6609';
 
 const
-	Commands = {
+	AllCommands = {
 		// Control commands
 		if: IfCommand,
 		elsif: ElsIfCommand,
@@ -182,6 +184,17 @@ const
 export const parseScript = (script, name = 'script.sieve') => {
 	script = script.replace(/\r?\n/g, '\r\n');
 
+	// Only activate available commands
+	const Commands = {};
+	forEachObjectEntry(AllCommands, (key, cmd) => {
+		const requires = (new cmd).require;
+		if (!requires
+		 || (Array.isArray(requires) ? requires : [requires]).every(string => capa.includes(string))
+		) {
+			Commands[key] = cmd;
+		}
+	});
+
 	let match,
 		line = 1,
 		tree = [],

dev/Sieve/README.md

@@ -2,7 +2,7 @@ https://www.iana.org/assignments/sieve-extensions/sieve-extensions.xhtml
 
 - [ ] RFC2852 envelope-deliverby / redirect-deliverby
 - [ ] RFC3461 envelope-dsn / redirect-dsn
-- [ ] RFC3894 copy
+- [x] RFC3894 copy
 - [ ] RFC4790 comparator-*
 - [x] RFC5173 body
 - [x] RFC5183 environment

snappymail/v/0.0.0/app/templates/Views/User/PopupsSieveScript.html

@@ -25,7 +25,7 @@
 				<b data-i18n="POPUPS_SIEVE_SCRIPT/CAPABILITY_LABEL"></b>:
 				<span data-bind="text: $root.sieveCapabilities"></span>
 			</pre>
-			<textarea style="width:100%" data-bind="value: body, valueUpdate: 'input'"></textarea>
+			<textarea style="width:100%;height:60vh" data-bind="value: body, valueUpdate: 'input'"></textarea>
 		</div>
 	</div>
 	<div data-bind="visible: !$root.rawActive()">