Prepare some Sieve restructuring for GUI

dev/Sieve/Commands/Controls.js

@@ -0,0 +1,92 @@
+/**
+ * https://tools.ietf.org/html/rfc5228#section-2.9
+ * A control structure is a control command that ends with a block instead of a semicolon.
+ */
+
+import {
+	GrammarCommand,
+	GrammarStringList,
+	GrammarQuotedString
+} from 'Sieve/Grammar';
+
+/**
+ * https://tools.ietf.org/html/rfc5228#section-3.1
+ * Usage:
+ *    if <test1: test> <block1: block>
+ *    elsif <test2: test> <block2: block>
+ *    else <block3: block>
+ */
+export class ConditionalCommand extends GrammarCommand
+{
+	constructor()
+	{
+		super();
+		this.test = null;
+	}
+
+	toString()
+	{
+		return this.identifier + ' ' + this.test + ' ' + this.commands;
+	}
+/*
+	public function pushArguments(array $args): void
+	{
+		args.forEach((arg, i) => {
+			if (':' === args[i-1][0]) {
+				this[args[i-1].replace(':','_')].value = arg.value;
+			}
+		});
+		print_r($args);
+		exit;
+	}
+*/
+}
+
+export class IfCommand extends ConditionalCommand
+{
+}
+
+export class ElsIfCommand extends ConditionalCommand
+{
+}
+
+export class ElseCommand extends ConditionalCommand
+{
+	toString()
+	{
+		return this.identifier + ' ' + this.commands;
+	}
+}
+
+/**
+ * https://tools.ietf.org/html/rfc5228#section-3.2
+ */
+export class RequireCommand extends GrammarCommand
+{
+	constructor()
+	{
+		super();
+		this.capabilities = new GrammarStringList();
+	}
+
+	toString()
+	{
+		return 'require ' + this.capabilities + ';';
+	}
+
+	pushArguments(args)
+	{
+		if (args[0] instanceof GrammarStringList) {
+			this.capabilities = args[0];
+		} else if (args[0] instanceof GrammarQuotedString) {
+			this.capabilities.push(args[0]);
+		}
+	}
+}
+
+/**
+ * https://tools.ietf.org/html/rfc5228#section-3.3
+ */
+export class StopCommand extends GrammarCommand
+{
+}