mirror of
https://gitee.com/langsisi_admin/serein-flow
synced 2026-03-03 00:00:49 +08:00
535 lines
28 KiB
C#
535 lines
28 KiB
C#
using Newtonsoft.Json.Linq;
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using Serein.Library;
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using Serein.Library.Utils;
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using Serein.Script.Node;
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using Serein.Script.Node.FlowControl;
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using System;
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using System.ComponentModel.Design;
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using System.Reactive;
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using System.Reflection;
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using System.Reflection.Metadata.Ecma335;
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using System.Runtime.CompilerServices;
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using System.Threading.Tasks;
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using System.Xml.Linq;
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namespace Serein.Script
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{
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/// <summary>
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/// 脚本解释器，负责执行 Serein 脚本
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/// </summary>
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public class SereinScriptInterpreter
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{
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private readonly Dictionary<ASTNode, Type> symbolInfos;
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/// <summary>
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/// 缓存对象方法调用节点
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/// </summary>
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private Dictionary<MemberFunctionCallNode, DelegateDetails> MethodNodeDelegateCaches { get; } = new Dictionary<MemberFunctionCallNode, DelegateDetails>();
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public SereinScriptInterpreter(Dictionary<ASTNode, Type> symbolInfos)
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{
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this.symbolInfos = symbolInfos;
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}
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public async Task<object?> InterpreterAsync(IScriptInvokeContext context, ProgramNode programNode)
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{
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var nodes = programNode.Statements;
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object? result = null;
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foreach (var node in nodes)
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{
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result = await InterpretAsync(context, node); // 解释每个节点
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if (context.IsReturn) break; // 如果需要提前返回，则停止执行
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}
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return result; // 返回最后一个节点的结果
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}
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/*
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async Task<object?> InterpreterAsync(IScriptInvokeContext context, ProgramNode node)
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{
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return null;
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}
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return await InterpreterAsync(context, node);
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*/
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private async Task<object?> InterpretAsync(IScriptInvokeContext context, ASTNode node)
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{
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switch (node)
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{
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case ProgramNode programNode: // 程序开始节点
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throw new Exception();
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case ReturnNode returnNode: // 程序退出节点
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async Task<object?> InterpreterReturnNodeAsync(IScriptInvokeContext context, ReturnNode returnNode)
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{
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object? returnValue = await InterpretAsync(context, returnNode.Value);
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context.IsNeedReturn = true;
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return returnValue;
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}
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return await InterpreterReturnNodeAsync(context, returnNode);
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#region 字面量节点
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case NullNode nullNode: // null
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return null; // 返回 null
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case CharNode charNode: // char字面量
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return charNode.Value; // 返回字符值
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case StringNode stringNode: // 字符串字面量
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return stringNode.Value; // 返回字符串值
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case BooleanNode booleanNode: // 布尔值字面量
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return booleanNode.Value; // 返回布尔值
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case NumberIntNode numberIntNode: // int整型数值字面量
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return numberIntNode.Value; // 返回 int 整型数值
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case NumberLongNode numberLongNode: // long整型数值字面量
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return numberLongNode.Value; // 返回 long 整型数值
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case NumberFloatNode numberFloatNode: // float浮点数值字面量
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return numberFloatNode.Value; // 返回 float 浮点数值
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case NumberDoubleNode numberDoubleNode: // double浮点数值字面量
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return numberDoubleNode.Value; // 返回 double 浮点数值
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#endregion
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case IdentifierNode identifierNode: // 变量定义
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return context.GetVarValue(identifierNode.Name);
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case IfNode ifNode: // if语句结构
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async Task<object?> InterpreterIfNodeAsync(IScriptInvokeContext context, IfNode ifNode)
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{
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var result = await InterpretAsync(context, ifNode.Condition) ?? throw new SereinSciptException(ifNode, $"条件语句返回了 null");
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if (result is not bool condition) throw new SereinSciptException(ifNode, "条件语句返回值不为 bool 类型");
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var branchNodes = condition ? ifNode.TrueBranch : ifNode.FalseBranch;
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if (branchNodes.Count == 0) return default;
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object? data = default;
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foreach (var branchNode in branchNodes)
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{
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data = await InterpretAsync(context, branchNode);
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if (branchNode is ReturnNode) // 遇到 Return 语句 提前退出
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{
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context.IsNeedReturn = true;
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break;
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}
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}
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return data;
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}
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return await InterpreterIfNodeAsync(context, ifNode);
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case WhileNode whileNode: // while语句结构
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async Task<object?> InterpreterWhileNodeAsync(IScriptInvokeContext context, WhileNode whileNode)
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{
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object? data = default;
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while (true)
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{
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var result = await InterpretAsync(context, whileNode.Condition) ?? throw new SereinSciptException(whileNode, $"循环节点条件返回了 null");
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if (result is not bool condition) throw new SereinSciptException(whileNode, "循环节点条件返回值不为 bool 类型");
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if (!condition) break;
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if (whileNode.Body.Count == 0) break;
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foreach (var node in whileNode.Body)
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{
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data = await InterpretAsync(context, node);
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if (node is ReturnNode) // 遇到 Return 语句 提前退出
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{
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context.IsNeedReturn = true;
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break ;
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}
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}
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}
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return data;
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}
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await InterpreterWhileNodeAsync(context, whileNode);
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return default;
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case AssignmentNode assignmentNode: // 变量赋值语句
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async Task InterpreterAssignmentNodeAsync(IScriptInvokeContext context, AssignmentNode assignmentNode)
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{
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if (assignmentNode.Target is IdentifierNode identifierNode)
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{
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var value = await InterpretAsync(context, assignmentNode.Value);
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context.SetVarValue(identifierNode.Name, value);
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}
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}
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await InterpreterAssignmentNodeAsync(context, assignmentNode);
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return default;
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case BinaryOperationNode binaryOperationNode: // 二元运算操作
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async Task<object?> InterpreterBinaryOperationNodeAsync(IScriptInvokeContext context, BinaryOperationNode binaryOperationNode)
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{
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// 递归计算二元操作
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var left = await InterpretAsync(context, binaryOperationNode.Left);
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if (left == null ) throw new SereinSciptException(binaryOperationNode.Left, $"左值尝试使用 null");
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var right = await InterpretAsync(context, binaryOperationNode.Right);
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if (right == null) throw new SereinSciptException(binaryOperationNode.Right, "右值尝试使用计算 null");
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var op = binaryOperationNode.Operator;
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var result = BinaryOperationEvaluator.EvaluateValue(left, op, right);
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return result;
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}
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return await InterpreterBinaryOperationNodeAsync(context, binaryOperationNode);
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case CollectionAssignmentNode collectionAssignmentNode: // 集合赋值节点
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async Task InterpreterCollectionAssignmentNodeAsync(IScriptInvokeContext context, CollectionAssignmentNode collectionAssignmentNode)
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{
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var collectionValue = await InterpretAsync(context, collectionAssignmentNode.Collection.Collection);
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if (collectionValue is null)
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{
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throw new ArgumentNullException($"解析{collectionAssignmentNode}节点时，集合返回空。");
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}
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var indexValue = await InterpretAsync(context, collectionAssignmentNode.Collection.Index);
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if (indexValue is null)
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{
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throw new ArgumentNullException($"解析{collectionAssignmentNode}节点时，索引返回空。");
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}
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var valueValue = await InterpretAsync(context, collectionAssignmentNode.Value);
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SetCollectionValue(collectionValue, indexValue, valueValue);
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}
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await InterpreterCollectionAssignmentNodeAsync(context, collectionAssignmentNode);
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return default;
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case CollectionIndexNode collectionIndexNode: // 集合获取索引对应值
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async Task<object?> InterpreterCollectionIndexNodeAsync(IScriptInvokeContext context, CollectionIndexNode collectionIndexNode)
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{
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var collectionValue = await InterpretAsync(context, collectionIndexNode.Collection);
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if (collectionValue is null)
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{
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throw new ArgumentNullException($"解析{collectionIndexNode}节点时，集合返回空。");
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}
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var indexValue = await InterpretAsync(context, collectionIndexNode.Index);
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if (indexValue is null)
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{
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throw new ArgumentNullException($"解析{collectionIndexNode}节点时，索引返回空。");
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}
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var result = GetCollectionValue(collectionValue, indexValue);
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return result;
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}
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return await InterpreterCollectionIndexNodeAsync(context, collectionIndexNode);
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case ClassTypeDefinitionNode classTypeDefinitionNode: // 类型定义
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void InterpreterClassTypeDefinitionNode(IScriptInvokeContext context, ClassTypeDefinitionNode classTypeDefinitionNode)
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{
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var className = classTypeDefinitionNode.ClassType.TypeName;
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if (SereinScript.MountType.ContainsKey(className))
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{
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//SereinEnv.WriteLine(InfoType.WARN, $"异常信息 : 类型重复定义，代码在第{classTypeDefinitionNode.Row}行: {classTypeDefinitionNode.Code.Trim()}");
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return;
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}
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if (DynamicObjectHelper.GetCacheType(className) == null)
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{
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var propertyTypes = classTypeDefinitionNode.Propertys.ToDictionary(p => p.Key, p => symbolInfos[p.Value]);
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var type = DynamicObjectHelper.CreateTypeWithProperties(propertyTypes, className); // 实例化新的类型
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SereinScript.MountType[className] = type; // 定义对象
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}
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}
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InterpreterClassTypeDefinitionNode(context, classTypeDefinitionNode);
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return default;
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case TypeNode typeNode: // 类型
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return default;
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case ObjectInstantiationNode objectInstantiationNode: // 类型实例化
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async Task<object?> InterpreterObjectInstantiationNodeAsync(IScriptInvokeContext context, ObjectInstantiationNode objectInstantiationNode)
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{
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if (!SereinScript.MountType.TryGetValue(objectInstantiationNode.Type.TypeName, out var type))
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{
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type = symbolInfos[objectInstantiationNode.Type];
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if (type is null)
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{
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throw new SereinSciptException(objectInstantiationNode, $"使用了未定义的类型\"{objectInstantiationNode.Type.TypeName}\"");
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}
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}
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// 获取参数
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var args = objectInstantiationNode.Arguments.Count == 0 ? [] :
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(await objectInstantiationNode.Arguments.SelectAsync(
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async argNode => await InterpretAsync(context, argNode)))
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.ToArray();
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var obj = Activator.CreateInstance(type, args: args);// 创建对象
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if (obj is null)
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{
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throw new SereinSciptException(objectInstantiationNode, $"类型创建失败\"{objectInstantiationNode.Type.TypeName}\"");
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}
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for (int i = 0; i < objectInstantiationNode.CtorAssignments.Count; i++)
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{
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var ctorAssignmentNode = objectInstantiationNode.CtorAssignments[i];
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var propertyName = ctorAssignmentNode.MemberName;
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var value = await InterpretAsync(context, ctorAssignmentNode.Value);
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SetPropertyValue(obj, propertyName, value);
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}
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return obj;
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}
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return await InterpreterObjectInstantiationNodeAsync(context, objectInstantiationNode);
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case CtorAssignmentNode ctorAssignmentNode:
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return default;
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case ExpressionNode expressionNode: // 类型表达式（链式调用）
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return await InterpretAsync(context, expressionNode.Value); // 直接计算表达式的值
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case MemberAccessNode memberAccessNode: // 对象成员访问
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async Task<object?> InterpreterMemberAccessNodeAsync(IScriptInvokeContext context, MemberAccessNode memberAccessNode)
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{
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var target = await InterpretAsync(context, memberAccessNode.Object);
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var memberName = memberAccessNode.MemberName;
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if(target is null) throw new SereinSciptException(memberAccessNode, $"无法获取成员，对象为 null \"{memberAccessNode.Object.Code}\"");
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var value = GetPropertyValue(target, memberName);
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return value;
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}
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return await InterpreterMemberAccessNodeAsync(context, memberAccessNode);
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case MemberAssignmentNode memberAssignmentNode: // 对象成员赋值
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async Task<object?> InterpreterMemberAssignmentNodeAsync(IScriptInvokeContext context, MemberAssignmentNode memberAssignmentNode)
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{
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var target = await InterpretAsync(context, memberAssignmentNode.Object);
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var memberName = memberAssignmentNode.MemberName;
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var value = await InterpretAsync(context, memberAssignmentNode.Value);
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if (target is null) throw new SereinSciptException(memberAssignmentNode, $"无法设置成员，对象为 null \"{memberAssignmentNode.Object.Code}\"");
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SetPropertyValue(target, memberName, value);
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return value;
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}
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return await InterpreterMemberAssignmentNodeAsync(context, memberAssignmentNode);
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case MemberFunctionCallNode memberFunctionCallNode: // 对象方法调用
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async Task<object?> InterpreterMemberFunctionCallNodeAsync(IScriptInvokeContext context, MemberFunctionCallNode memberFunctionCallNode)
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{
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var target = await InterpretAsync(context, memberFunctionCallNode.Object);
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if (!MethodNodeDelegateCaches.TryGetValue(memberFunctionCallNode, out DelegateDetails? delegateDetails))
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{
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var methodName = memberFunctionCallNode.FunctionName;
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var methodInfo = memberFunctionCallNode.Arguments.Count == 0 ? target?.GetType().GetMethod(methodName, []) : target?.GetType().GetMethod(methodName);// 获取参数列表的类型
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if (methodInfo is null) throw new SereinSciptException(memberFunctionCallNode, $"对象没有方法\"{memberFunctionCallNode.FunctionName}\"");
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delegateDetails = new DelegateDetails(methodInfo);
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MethodNodeDelegateCaches[memberFunctionCallNode] = delegateDetails;
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} // 查询是否有缓存
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// 获取参数
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var arguments = memberFunctionCallNode.Arguments.Count == 0 ? [] :
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(await memberFunctionCallNode.Arguments.SelectAsync(
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async argNode => await InterpretAsync(context, argNode)))
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.ToArray();
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// 调用方法
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var reuslt = await delegateDetails.InvokeAsync(target, arguments);
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return reuslt;
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}
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return await InterpreterMemberFunctionCallNodeAsync(context, memberFunctionCallNode);
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case FunctionCallNode functionCallNode: // 外部挂载的函数调用
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async Task<object?> InterpreterFunctionCallNodeAsync(IScriptInvokeContext context, FunctionCallNode functionCallNode)
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{
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// 获取流程上下文
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if (context.FlowContext != null && functionCallNode.FunctionName.Equals("getFlowApi", StringComparison.OrdinalIgnoreCase))
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{
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return context.FlowContext;
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}
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else if (functionCallNode.FunctionName.Equals("getScriptApi", StringComparison.OrdinalIgnoreCase))
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{
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return context;
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}
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// 获取参数
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var arguments = functionCallNode.Arguments.Count == 0 ? [] :
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(await functionCallNode.Arguments.SelectAsync(
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async argNode => await InterpretAsync(context, argNode)))
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.ToArray();
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var funcName = functionCallNode.FunctionName;
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object? instance = null; // 静态方法不需要传入实例，所以可以传入null
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// 查找并执行对应的函数
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if (!SereinScript.FunctionDelegates.TryGetValue(funcName, out DelegateDetails? function))
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throw new SereinSciptException(functionCallNode, $"没有挂载方法\"{functionCallNode.FunctionName}\"");
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if (!function.EmitMethodInfo.IsStatic)
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{
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if (!SereinScript.DelegateInstances.TryGetValue(funcName, out var action))
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{
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throw new SereinSciptException(functionCallNode, $"挂载方法 {funcName} 时需要同时给定获取实例的 Func<object>");
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}
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instance = action.Invoke();// 非静态的方法需要获取相应的实例
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if (instance is null)
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{
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throw new SereinSciptException(functionCallNode, $"函数 {funcName} 尝试获取实例时返回了 null ");
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}
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}
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var result = await function.InvokeAsync(instance, arguments);
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return result;
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}
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return await InterpreterFunctionCallNodeAsync(context, functionCallNode);
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default: // 未定义的节点类型
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throw new Exception($"解释器未实现的节点类型 {node.GetType()}");
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}
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}
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/// <summary>
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/// 设置对象成员
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/// </summary>
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/// <param name="target">对象</param>
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/// <param name="memberName">属性名称</param>
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/// <param name="value">属性值</param>
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/// <exception cref="Exception"></exception>
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private void SetPropertyValue(object target, string memberName, object? value)
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{
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var targetType = target?.GetType();
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if (targetType is null) return;
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var propertyInfo = targetType.GetProperty(memberName);
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if (propertyInfo is null)
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{
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var fieldInfo = target?.GetType().GetRuntimeField(memberName);
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if (fieldInfo is null)
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{
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throw new Exception($"类型 {targetType} 对象没有成员\"{memberName}\"");
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}
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else
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{
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var convertedValue = Convert.ChangeType(value, fieldInfo.FieldType);
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fieldInfo.SetValue(target, convertedValue);
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}
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}
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else
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{
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if (value is null)
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{
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propertyInfo.SetValue(target, null);
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return;
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}
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var valueTtpe = value.GetType();
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if (propertyInfo.PropertyType.IsAssignableFrom(valueTtpe))
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{
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propertyInfo.SetValue(target, value);
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}
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else if (propertyInfo.PropertyType.FullName == valueTtpe.FullName)
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{
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propertyInfo.SetValue(target, value);
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}
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else
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{
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throw new Exception($"类型 {targetType} 对象成员\"{memberName}\" 赋值时异常");
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}
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}
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}
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/// <summary>
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/// 从对象获取值
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/// </summary>
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/// <param name="target">对象</param>
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/// <param name="memberName">成员名称</param>
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/// <returns></returns>
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/// <exception cref="Exception"></exception>
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private object? GetPropertyValue(object target, string memberName)
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{
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var targetType = target?.GetType();
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if (targetType is null) return null;
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var propertyInfo = targetType.GetProperty(memberName);
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if (propertyInfo is null)
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{
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var fieldInfo = target?.GetType().GetRuntimeField(memberName);
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if (fieldInfo is null)
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{
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throw new Exception($"类型 {targetType} 对象没有成员\"{memberName}\"");
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}
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else
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{
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return fieldInfo.GetValue(target);
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}
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}
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else
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{
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return propertyInfo.GetValue(target);
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}
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}
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/// <summary>
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/// 设置集合成员
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/// </summary>
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/// <param name="collectionValue"></param>
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/// <param name="indexValue"></param>
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/// <param name="valueValue"></param>
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/// <returns></returns>
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/// <exception cref="ArgumentException"></exception>
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private void SetCollectionValue(object collectionValue, object indexValue, object valueValue)
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{
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// 解析数组/集合名与索引部分
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var targetType = collectionValue.GetType(); // 目标对象的类型
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#region 处理键值对
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if (targetType.IsGenericType && targetType.GetGenericTypeDefinition() == typeof(Dictionary<,>))
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{
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// 目标是键值对
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var method = targetType.GetMethod("set_Item", BindingFlags.Public | BindingFlags.Instance);
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if (method is not null)
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{
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method.Invoke(collectionValue, [indexValue, valueValue]);
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}
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}
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#endregion
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#region 处理集合对象
|
||
else
|
||
{
|
||
if (indexValue is int index)
|
||
{
|
||
// 获取数组或集合对象
|
||
// 访问数组或集合中的指定索引
|
||
if (collectionValue is Array array)
|
||
{
|
||
if (index < 0 || index >= array.Length)
|
||
{
|
||
throw new ArgumentException($"解析{collectionValue}节点时，数组下标越界。");
|
||
}
|
||
array.SetValue(valueValue, index);
|
||
return;
|
||
}
|
||
else if (collectionValue is IList<object> list)
|
||
{
|
||
if (index < 0 || index >= list.Count)
|
||
{
|
||
throw new ArgumentException($"解析{collectionValue}节点时，数组下标越界。");
|
||
}
|
||
list[index] = valueValue;
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
#endregion
|
||
throw new ArgumentException($"解析异常， {collectionValue} 并非有效集合。");
|
||
}
|
||
|
||
/// <summary>
|
||
/// 获取集合中的成员
|
||
/// </summary>
|
||
/// <param name="collectionValue"></param>
|
||
/// <param name="indexValue"></param>
|
||
/// <returns></returns>
|
||
/// <exception cref="ArgumentException"></exception>
|
||
private object? GetCollectionValue(object collectionValue, object indexValue)
|
||
{
|
||
// 解析数组/集合名与索引部分
|
||
var targetType = collectionValue.GetType(); // 目标对象的类型
|
||
#region 处理键值对
|
||
if (targetType.IsGenericType && targetType.GetGenericTypeDefinition() == typeof(Dictionary<,>))
|
||
{
|
||
// 目标是键值对
|
||
var method = targetType.GetMethod("get_Item", BindingFlags.Public | BindingFlags.Instance);
|
||
if (method is not null)
|
||
{
|
||
var value = method.Invoke(collectionValue, [indexValue]);
|
||
return value;
|
||
}
|
||
}
|
||
#endregion
|
||
#region 处理集合对象
|
||
else
|
||
{
|
||
if (indexValue is int index)
|
||
{
|
||
// 获取数组或集合对象
|
||
// 访问数组或集合中的指定索引
|
||
if (collectionValue is Array array)
|
||
{
|
||
if (index < 0 || index >= array.Length)
|
||
{
|
||
throw new ArgumentException($"解析{collectionValue}节点时，数组下标越界。");
|
||
}
|
||
|
||
return array.GetValue(index);
|
||
}
|
||
else if (collectionValue is IList<object> list)
|
||
{
|
||
if (index < 0 || index >= list.Count)
|
||
{
|
||
throw new ArgumentException($"解析{collectionValue}节点时，数组下标越界。");
|
||
}
|
||
return list[index];
|
||
}
|
||
}
|
||
}
|
||
#endregion
|
||
|
||
throw new ArgumentException($"解析{collectionValue}节点时，左值并非有效集合。");
|
||
}
|
||
|
||
|
||
}
|
||
}
|
