package handler

import (
	"fmt"
	"html/template"
	"io/ioutil"
	"os"
	"strings"

	"github.com/gin-gonic/gin"
	"github.com/russross/blackfriday"
)

func Article(c *gin.Context) {
	id := c.Param("id")

	id = strings.Replace(id, "-", "/", -1)

	articleBasePath := os.Getenv("ARTICLE_PATH")

	articlePath := articleBasePath + "/" + id + ".md"

	if _, err := os.Stat(articlePath); os.IsNotExist(err) {
		c.String(200, "文章不存在")

		return
	}

	// 读取Go Markdown文件
	input, err := ioutil.ReadFile(articlePath)
	if err != nil {
		fmt.Println(err)
		os.Exit(1)
	}

	// 转换为HTML
	output := blackfriday.MarkdownCommon(input)

	c.HTML(200, "article.html", gin.H{
		"content": template.HTML(string(output)),
	})
}