feat: add molang package

1. upgrade bukkit chat
2. fix config update error

Signed-off-by: MiaoWoo <admin@yumc.pw>

packages/molang/src/parser/expressions/statement.ts

@@ -0,0 +1,102 @@
+import { Expression, IExpression } from '../expression'
+import { StaticExpression } from './static'
+import { VoidExpression } from './void'
+
+export class StatementExpression extends Expression {
+	type = 'StatementExpression'
+	protected didReturn?: boolean = undefined
+	protected wasLoopBroken = false
+	protected wasLoopContinued = false
+
+	constructor(protected expressions: IExpression[]) {
+		super()
+	}
+
+	get allExpressions() {
+		return this.expressions
+	}
+	setExpressionAt(index: number, expr: IExpression) {
+		this.expressions[index] = expr
+	}
+
+	get isReturn() {
+		if (this.didReturn !== undefined) return this.didReturn
+
+		// This breaks scope vs. statement parsing for some reason
+		let i = 0
+		while (i < this.expressions.length) {
+			const expr = this.expressions[i]
+
+			if (expr.isBreak) return false
+			if (expr.isContinue) return false
+			if (expr.isReturn) {
+				this.didReturn = true
+				return true
+			}
+			i++
+		}
+		this.didReturn = false
+		return false
+	}
+
+	get isBreak() {
+		if (this.wasLoopBroken) {
+			this.wasLoopBroken = false
+			return true
+		}
+		return false
+	}
+	get isContinue() {
+		if (this.wasLoopContinued) {
+			this.wasLoopContinued = false
+			return true
+		}
+		return false
+	}
+
+	isStatic() {
+		let i = 0
+		while (i < this.expressions.length) {
+			if (!this.expressions[i].isStatic()) return false
+			i++
+		}
+		return true
+	}
+
+	eval() {
+		this.didReturn = false
+		this.wasLoopBroken = false
+		this.wasLoopContinued = false
+		let i = 0
+		while (i < this.expressions.length) {
+			let res = this.expressions[i].eval()
+
+			if (this.expressions[i].isReturn) {
+				this.didReturn = true
+				return res
+			} else if (this.expressions[i].isContinue) {
+				this.wasLoopContinued = true
+				return
+			} else if (this.expressions[i].isBreak) {
+				this.wasLoopBroken = true
+				return
+			}
+			i++
+		}
+		return 0
+	}
+
+	toString() {
+		let str = ''
+		for (const expr of this.expressions) {
+			if (
+				expr instanceof VoidExpression ||
+				(expr instanceof StaticExpression && !expr.isReturn)
+			)
+				continue
+			str += `${expr.toString()};`
+		}
+
+		return str
+	}
+}