頁面渲染模塊的作用是將我們從後臺獲取到的數據渲染到html頁面上。爲此,我們採用了geogle的開源html模板庫ctemplate,具體介紹可以百度。
我使用的是碼雲上大神編譯好的(只支持centOS7),其他環境需要自己編譯。
centos7版本,可以直接用
其他環境就需要自己在github上下載源碼自己編譯
#pragma once
#include "ctemplate/template.h"
#include <string>
#include <vector>
#include "oj_model.hpp"
class OjView
{
public:
//渲染html頁面,並且返回頁面·
static void ExpandAllQuestionsHtml(std::string* html, std::vector<Question>& ques) {
//獲取數據字典-》將拿到的試題數據按照一定順序保存到內存中
ctemplate::TemplateDictionary dict("all_questions");
for (const auto& que: ques) {
ctemplate::TemplateDictionary* section_dict = dict.AddSectionDictionary("question");
section_dict->SetValue("id", que._id);
section_dict->SetValue("id", que._id);
section_dict->SetValue("name", que._name);
section_dict->SetValue("star", que._star);
}
//2.獲取模板類的類指針,加載預定義的html頁面到內存中
ctemplate::Template* tl = ctemplate::Template::GetTemplate("./template/all_questions.html", ctemplate::DO_NOT_STRIP);
//3.渲染,拿着模板類的指針,將數據字典當中的數據更新到html頁面中
tl->Expand(html, &dict);
}
//id name star desc header
//ti'mu
static void ExpandOneQuestion(const Question ques, std::string& desc, std::string& header, std::string* html)
{
ctemplate::TemplateDictionary dict("question");
dict.SetValue("id", ques._id);
dict.SetValue("name", ques._name);
dict.SetValue("star", ques._star);
dict.SetValue("desc", desc);
dict.SetValue("header", header);
ctemplate::Template* tpl = ctemplate::Template::GetTemplate("./template/question.html", ctemplate::DO_NOT_STRIP);
tpl->Expand(html, &dict);
}
static void ExpandReason(const std::string& errorno, const std::string& reason, const std::string& stdout_reason, std::string* html)
{
ctemplate::TemplateDictionary dict("reason");
dict.SetValue("errono", errorno);
dict.SetValue("reason", reason);
dict.SetValue("stdout", stdout_reason);
ctemplate::Template* tpl = ctemplate::Template::GetTemplate("./template/reason.html", ctemplate::DO_NOT_STRIP);
tpl->Expand(html, &dict);
}
};