Qiita API v2で記事一覧を取得して、Markdown記法で日付ごとのファイルの先頭に追記していく。

QiitaNews.go

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"os"
	"time"
)

type structTags struct {
	Name    string   `json:"name"`
	Version []string `json:"versions"`
}

type structUser struct {
	Id   string `json:"id"`
	Name string `json:"name"`
}

type Post struct {
	Created_at     string       `json:"created_at"`
	Updated_at     string       `json:"updated_at"`
	Title          string       `json:"title"`
	Url            string       `json:"url"`
	Likes_count    int          `json:"likes_count"`
	Comments_count int          `json:"comments_count"`
	User           structUser   `json:"user"`
	Tags           []structTags `json:"tags"`
}

const (
	url_base  = "http://qiita.com/api/v2/items?per_page=10"
	path_base = "./github/"
)

func main() {

	jst := time.FixedZone("Asia/Tokyo", 9*60*60)

	beginTime := time.Now().Add(-2 * time.Hour).In(jst)
	beginTime = time.Date(beginTime.Year(), beginTime.Month(), beginTime.Day(), beginTime.Hour(), 0, 0, 0, jst)
	toTime := time.Now().Add(-1 * time.Hour).In(jst)
	toTime = time.Date(toTime.Year(), toTime.Month(), toTime.Day(), toTime.Hour(), 0, 0, 0, jst)

	log.Printf("%#v %#v \n", beginTime.Format("2006-01-02T15:04:05-07:00"), toTime.Format("2006-01-02T15:04:05-07:00"))
	textmd := fmt.Sprintf("# %s\n", beginTime.Format("2006-01-02 15:00～"))

	for page := 1; page < 3; page++ {
		url := fmt.Sprintf("%s&page=%d", url_base, page)
		resp, err := http.Get(url)
		if err != nil {
			log.Fatal(err.Error())
		}

		body, err := ioutil.ReadAll(resp.Body)
		if err != nil {
			log.Fatal(err.Error())
		}
		resp.Body.Close()

		var postsTemp []Post
		err = json.Unmarshal(body, &postsTemp)
		if err != nil {
			log.Fatal(err)
		}

		for _, post := range postsTemp {

			t, _ := time.Parse("2006-01-02T15:04:05-07:00", post.Created_at)
			fmt.Println(beginTime, ", ", t, ", ", toTime)
			if t.After(beginTime) && t.Before(toTime) {
				log.Printf("%#v \n", post)

				textmd += fmt.Sprintf("## [%s](%s)\n", post.Title, post.Url)

				textmd += fmt.Sprintf("##### ")
				for _, tag := range post.Tags {
					textmd += fmt.Sprintf("[%s](https://qiita.com/tags/%s), ", tag.Name, tag.Name)
				}
				textmd += fmt.Sprintf("\n")

				textmd += fmt.Sprintf("###### update:%s\n", t.Format("2006-01-02 15:04"))
				textmd += fmt.Sprintf("---\n")
			}
		}
	}

	filename := path_base + beginTime.Format("2006-01-02") + ".md"
	oldfile, _ := ioutil.ReadFile(filename)
	ioutil.WriteFile(filename, []byte(textmd), 0666)

	addfile, _ := os.OpenFile(filename, os.O_WRONLY|os.O_APPEND, 0666)
	defer addfile.Close()

	fmt.Fprintln(addfile, "\n\n\n")
	fmt.Fprintln(addfile, string(oldfile))
}