parser.ts

import*aspathfrom"path";
import*astsfrom"ntypescript";
import*ashtmlparser2from"htmlparser2";

import"deno.land/std/fs/mod.ts";
import"deno.land/std/path/mod.ts";

import{download}from"./utils";

importtype{ISub}from"./typings";

classSubmissionimplementsISub{
name: "";
info: "";
time: "";
status: "Accepted";
runtime: "";
memory: "";
code: "";
}

/**
 * 解析器
 * @author yalda
 * @date 2019.08
 */
exportclassParserTS{
privatesubmissions: Submission[]=[];

/**
 * 加载文件
 */
publicload=({ filePath }: any): Parser=>{
filePath=path.join(filePath,"index.ts");
letfile=fs.readFileSync(filePath,{encoding: "utf8"}).trim();

constsourseFile: ts.SourceFile=ts.createSourceFile(
"code.ts",
file,
ts.ScriptTarget.ES5,
true,
);
this.parseSourse(sourseFile);
returnthis;
};

/**
 * 递归遍历 AST
 */
privateparseSourse(node: ts.SourceFile){
constsyntax: ts.Node=node
.getChildren()
.find((n: ts.Node)=>ts.formatSyntaxKind(n.kind)=="SyntaxList");
this.parseSyntax(syntax);
}

/**
 * 函数语句 & 箭头函数定义语句进行格式化
 */
privateparseSyntax(syntax: ts.Node){
const_this=this;
syntax.getChildren().forEach((stmt: ts.Node)=>{
constkind=ts.formatSyntaxKind(stmt.kind);
if(kind=="FunctionDeclaration"||kind=="VariableStatement"){
constsubmission=newSubmission();
submission.sourse=stmt.getText();
constinfo: Info=_this.parseDoc(stmt);
submission.info=info;
submission.name=info.title;
_this.submissions.push(submission);
}
});
}

/**
 * 解析注解进行格式化
 */
privateparseDoc(stmt: ts.Node): Info{
constinfo=newInfo();
constcommNode: any=stmt
.getChildren()
.find((n: ts.Node)=>ts.formatSyntaxKind(n.kind)==="JSDocComment");
let[title, ...comment]=(commNode.comment||"").split("\n");
info.title=title;
info.comment=comment.join("\n");
commNode
.getChildren()
.forEach((n: any)=>(info[n.tagName.text]=n.comment));
returninfo;
}

/**
 * 获取 sourse map
 */
getgetSourse(): Submission[]{
returnthis.submissions;
}
}

// parse html
classParseHtml{}

letstr: string=fs.readFileSync("./test.md",{encoding: "utf8"});

str=str.replace(/\\n/g,"");
str=str.replace(/\\t/g,"");
str=str.replace(/\n/g,"");
str=str.replace(/\t/g,"");

lets=newSet();
letc={
value: "",
cache: "",
};// context
constparser=newhtmlparser2.Parser(
{
asynconopentag(name: any,attribs){
// 块级作用域
if(name==="p"){
// 段落
return"\n**\n";
}
if(name==="code"){
return"`";
}
if(name==="pre"){
return"```bash\n";
}
if(name==="em"||name==="i"){
return"**";
}
if(name==="strong"||name==="b"){
return"*";
}
if(name==="ul"||name==="ol"){
// <ul> \n
}
if(name==="li"){
// <li> - ***\n
}
if(name==="img"){
// \![alt](src 'title')
const{ src }=attribs;
// let buffer = await download(src);
// fs.writeFileSync('./assets/images', buffer, {
// encoding: 'binary'
// });
return`![](${src})`;
}
if(name==="a"){
return`[]()`;
}
},
ontext(text: string){
// Example
if(
text==="Example:"||
text==="Example 1:"||
text==="Example 2:"||
text==="Example 3:"||
text==="Example 4:"||
text==="Example 5:"
){
}
// Note
if(text==="Note:"||text==="NOTE:"){
}
// Allow Up
if(text==="Follow up:"){
}
// Constraints:
if(text==="Constraints:"){
}
// Credits
if(text==="Credits:"){
}
},
onclosetag(name: string){
if(name==="p"){
// 段落
return"\n";
}
if(name==="code"){
return"`";
}
if(name==="pre"){
return"```\n\n";
}
if(name==="em"||name==="i"){
return"**";
}
if(name==="strong"||name==="b"){
return"*";
}
if(name==="ul"||name==="ol"){
// </ul> \n
}
if(name==="li"){
// </li> - ***\n
}
if(name==="img"){
// \n
}
if(name==="a"){
return`[]()`;
}
},
onerror(e){},
onend(){},
},
{decodeEntities: true},
);

parser.write(str);
parser.end();