Added Sieve extension rfc5463

dev/Sieve/Extensions/rfc5463.js

@@ -0,0 +1,64 @@
+/**
+ * https://tools.ietf.org/html/rfc5463
+ */
+
+import {
+	GrammarCommand,
+	GrammarTest,
+	GrammarString,
+	GrammarStringList
+} from 'Sieve/Grammar';
+
+/**
+ * https://datatracker.ietf.org/doc/html/rfc5463#section-4
+ */
+export class IHaveTest extends GrammarTest
+{
+	constructor()
+	{
+		super();
+		this.capabilities = new GrammarStringList;
+	}
+
+	get require() { return 'ihave'; }
+
+	toString()
+	{
+		return 'ihave ' + this.capabilities;
+	}
+
+	pushArguments(args)
+	{
+		let l = args.length;
+		if (args[l-1] instanceof GrammarString) {
+			this.method = args[l-1];
+		}
+	}
+}
+
+/**
+ * https://datatracker.ietf.org/doc/html/rfc5463#section-5
+ */
+export class ErrorCommand extends GrammarCommand
+{
+	constructor()
+	{
+		super();
+		this.message = new GrammarString;
+	}
+
+	get require() { return 'ihave'; }
+
+	toString()
+	{
+		return 'error ' + this.message + ';';
+	}
+
+	pushArguments(args)
+	{
+		let l = args.length;
+		if (args[l-1] instanceof GrammarString) {
+			this.method = args[l-1];
+		}
+	}
+}