Reddit API script: fetching the top subreddit posts for "JavaScript" and writing to file.

reddit_api_top_subreddit_posts.go

 package main

import (
	"context"
	"fmt"
	"io"
	"os"
	"log"
	"github.com/vartanbeno/go-reddit/reddit"
)

var ctx = context.Background()

func WriteFile(subreddit string, filename string) error {
    data:=fetchPosts(subreddit);
    file, err := os.Create(filename)
    if err != nil {
        return err
    }
    defer file.Close()

    _, err = io.WriteString(file, data)
    if err != nil {
        return err
    }
    return file.Sync()
}

func EmptyFile(filename string) {
    e := os.Remove(filename)
    if e != nil {
        log.Fatal(e)
    }
    o, _ := os.Stat(filename)
    if o != nil {
        log.Fatal(o)
    }
}

func fetchPosts(sub string) string {
	id:= "fake"
	secret:= "alsofake"
	username:= "veryfake"
	password:= "extrafake"
	credentials := reddit.Credentials{ID: id, Secret: secret, Username: username, Password: password}
	client, _ := reddit.NewClient(credentials)
	posts, _, err :=client.Subreddit.TopPosts(ctx, sub, &reddit.ListPostOptions{
		ListOptions: reddit.ListOptions{
			Limit: 100,
		},
		Time: "today",
	})
        text:="";
	if err != nil {
		fmt.Println(err)
		text= "empty";
	}

	for _, post := range posts {
		texttitle:=fmt.Sprintf("* %s\n", post.Title)
		textlink:=fmt.Sprintf("** %s\n", post.URL)
		text=text+texttitle+textlink;
	}
	return text;
}

func main() {
	subreddit:="javascript"; 
	fn:=subreddit+".org"
	EmptyFile(fn)
	WriteFile(subreddit,fn);
}