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const parser = require("@babel/parser");
//从AST中找到相应的节点
const traverse = require("@babel/traverse").default;
//提供了很多和 AST 的 Node 节点相关的辅助函数
const t = require("@babel/types");
//将 AST 树重新转为对应的代码字符串
const generate = require("babel-generator").default;
const template = require("@babel/template").default;
const isIwant_replaceElement = (path) => {
const createMenuEntryParent = path.findParent(path => path.isMemberExpression());
const isIwant = t.isIdentifier(path.node, {name: "_createMenuEntry"})
&& createMenuEntryParent.node
&& createMenuEntryParent.node.object
&& createMenuEntryParent.node.object.object
&& createMenuEntryParent.node.object.object.name === "ReplaceMenuProvider";
return isIwant;
};
const isIwant_commandStack = (path) => path.node && path.node.id && path.node.id.name === "CommandInitializer";
const isIwant_initBpmn = (path)=>{
let isIwantLeftPropertiesName = false;
let isIwantLeftInstanceName = false;
try{
isIwantLeftPropertiesName = path.get("left.property").isIdentifier({name:"_init"});
isIwantLeftInstanceName = path.get("left.object.object").isIdentifier({name:"PropertiesPanel"});
}finally {
return isIwantLeftPropertiesName && isIwantLeftInstanceName;
}
};
const isIwant_elementDocuEntry = (path)=>{
let isIwantVariableDeclarations = false;
try{
isIwantVariableDeclarations = path.get("declarations.0").node.id.name === "processRef";
}finally {
return isIwantVariableDeclarations;
}
};
const isIwant_conditionalEntry = (path)=>{
let isIwantConditionalEntry = false;
try{
const node = path.get("declarations.0").node;
if(node.id.name === "bo" && node.init.callee.name === "getBusinessObject"){
const moduleExportsParams=path.parentPath.parent.params.reduce((result,item)=>{
result.push(item.name);
return result;
},[]);
isIwantConditionalEntry = ["group","element","bpmnFactory","translate"].every(item=>moduleExportsParams.includes(item));
}
}finally {
return isIwantConditionalEntry ;
}
};
const isIwant_Element_BusinessObject =(path) =>{
let isIwantElementAndBusinessObject = false;
try{
const node = path.get("declarations.0").node;
if(node.id.name === "bo" && node.init.callee.name === "getBusinessObject"){
const moduleExportsParams=path.parentPath.parent.params.reduce((result,item)=>{
result.push(item.name);
return result;
},[]);
isIwantElementAndBusinessObject = ["element","bpmnFactory","options","translate"].every(item=>moduleExportsParams.includes(item));
}
}finally {
return isIwantElementAndBusinessObject;
}
};
module.exports = function (source) {
let ast = parser.parse(source, {
sourceType: "module",
plugins: ["dynamicImport"]
});
traverse(ast, {
Identifier(path) {
if (isIwant_replaceElement(path)) {
const parent = path.findParent(path => path.isAssignmentExpression());
const rightFunctionExpression = parent.get("right");
const functionBody = rightFunctionExpression.get("body").get("body");
const astVmReplaceElement_1 = template.ast(`var vm=window.vm.$children[0];`);
const astVmReplaceElement_2 = template.ast(`vm.$set(vm.bpmnPanel,'replaceElement',replaceElement);`);
const astVmReplaceElement_3 = template.ast(`window.bpmnPanel.replaceElement = replaceElement;`);
functionBody[2].insertBefore(astVmReplaceElement_1);
functionBody[2].insertBefore(astVmReplaceElement_2);
functionBody[2].insertBefore(astVmReplaceElement_3);
}
},
FunctionDeclaration(path) {
Eif(isIwant_commandStack(path)){
const functionBody = path.get("body").get("body");
const astCommandStackVm = template.ast(`var vm=window.vm.$children[0];`);
const astCommandStackVmSet = template.ast(`vm.$set(vm.bpmnPanel,'bpmnPanelCommandStack',commandStack);`);
const astCommandStack = template.ast(`window.bpmnPanel.bpmnPanelCommandStack=commandStack;`);
functionBody[0].insertBefore(astCommandStackVm);
functionBody[0].insertBefore(astCommandStackVmSet);
functionBody[0].insertBefore(astCommandStack);
}
},
AssignmentExpression(path) {
if(isIwant_initBpmn(path)){
const functionBody = path.get("right.body.body");
const astBpmnPanel = template.ast(`window.bpmnPanel={};`);
//[NodePath...] NodePath可以使用insertBefore方法
functionBody[0].insertBefore(astBpmnPanel);
}
},
VariableDeclaration(path){
if(isIwant_elementDocuEntry(path)){
const astBpmnPanelElementDocuEntryVm = template.ast(`var vm=window.vm.$children[0];`);
const astBpmnPanelElementDocuEntryVmSet = template.ast(`vm.$set(vm.bpmnPanel,'bpmnPanelElementDocuEntry',group.entries[0]);`);
const astBpmnPanelElementDocuEntry = template.ast(`window.bpmnPanel.bpmnPanelElementDocuEntry=group.entries[0];`);
const functionBody = path.container;
//[Node...] Node类型不能使用insertBefore方法
functionBody.splice(path.key,0,astBpmnPanelElementDocuEntryVm,astBpmnPanelElementDocuEntryVmSet,astBpmnPanelElementDocuEntry);
}
if(isIwant_conditionalEntry(path)){
const astBpmnPanelConditionalEntryVm = template.ast(`var vm=window.vm.$children[0];`);
const astBpmnPanelConditionalEntryVmSet = template.ast(`vm.$set(vm.bpmnPanel,'bpmnPanelConditionalEntry',group.entries[0]);`);
const astBpmnPanelConditionalEntry = template.ast(`window.bpmnPanel.bpmnPanelConditionalEntry=group.entries[0];`);
const functionBody = path.container;
//[Node...] Node类型不能使用insertBefore方法
functionBody.push(...[astBpmnPanelConditionalEntryVm,astBpmnPanelConditionalEntryVmSet,astBpmnPanelConditionalEntry]);
}
if(isIwant_Element_BusinessObject(path)){
const astVm = template.ast(`var vm=window.vm.$children[0];`);
const astElementVmSet = template.ast(`vm.$set(vm.bpmnPanel,'bpmnPanelElement',element);`);
const astBusinessObjectVmSet = template.ast(`vm.$set(vm.bpmnPanel,'bpmnPanelBusinessObject',bo);`);
const astElement = template.ast(`window.bpmnPanel.bpmnPanelElement=element;`);
const astBusinessObject = template.ast(`window.bpmnPanel.bpmnPanelBusinessObject=bo;`);
const functionBody = path.container;
functionBody.splice(path.key+1,0,astVm,astElementVmSet,astBusinessObjectVmSet,astElement,astBusinessObject);
}
}
});
return generate(ast).code;
};
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