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path: root/cheetah-bot.go
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// this is about the sloppiest code i have ever written in my life, i would not
// recommend running this yourself.
package main

import (
	"bufio"
	"fmt"
	"io"
	"io/ioutil"
	"os"
	"time"
	/*
		// imgur stuff
		"github.com/koffeinsource/go-imgur"
		"github.com/koffeinsource/go-klogger"
		"io/ioutil"
		"log"
		"net/http"
	*/

	"github.com/turnage/graw/reddit"

	"github.com/McKael/madon"
)

func main() {
	// prepare day file
	df, err := os.OpenFile("/var/local/cheetahs/day.txt", os.O_RDWR|os.O_CREATE, 0644)
	if err != nil {
		fmt.Println("Failed to open file: ", err)
		os.Exit(1)
	}
	defer df.Close()

	// read in current day
	var day int
	_, err = fmt.Fscanf(df, "%d", &day)
	if err != nil {
		if err == io.EOF {
			// default to day 1 if day file was just created by os.O_CREATE
			day = 1
		} else {
			fmt.Println("Failed to read day: ", err)
			os.Exit(1)
		}
	}

	filename := fmt.Sprintf("/var/local/cheetahs/D%03d.jpg", day)
	descriptionFilename := fmt.Sprintf("/var/local/cheetahs/D%03d.desc", day)

	description, err := ioutil.ReadFile(descriptionFilename)
	if err != nil {
		fmt.Println("Failed to read description: ", err)
		os.Exit(1)
	}

	reddit, err := reddit.NewBotFromAgentFile("/var/local/cheetahs/cheetah-reddit.agent", 0)
	if err != nil {
		fmt.Println("Failed to create bot handle: ", err)
		os.Exit(1)
	}

	mastoToken := new(madon.UserToken)
	var mastoId, mastoSecret string

	mf, err := os.Open("/var/local/cheetahs/cheetah-masto.agent")
	if err != nil {
		fmt.Println("Failed to open file: ", err)
		os.Exit(1)
	}
	defer mf.Close()
	_, err = fmt.Fscanf(mf, "App ID: %s\nApp Secret: %s\nUser Token: %s", &mastoId, &mastoSecret, &mastoToken.AccessToken)
	if err != nil {
		fmt.Println("Failed to read mastodon authentication: ", err)
		os.Exit(1)
	}

	masto, err := madon.RestoreApp("cheetah-bot", "botsin.space", mastoId, mastoSecret, mastoToken)

	/*
		// create imgur client and upload to imgur
		imgur := new(imgur.Client)
		imgur.HTTPClient = new(http.Client)
		imgur.Log = new(klogger.CLILogger)
		log.SetOutput(ioutil.Discard)
		imgur.ImgurClientID = "9657b96ca0b7f38" // definitely not a random client id pulled off of github
		imgurStruct, st, err := imgur.UploadImageFromFile(filename, "", "", "")
		if st != 200 || err != nil {
			fmt.Printf("Failed to upload to imgur: %v (status %v)\n", err, st)
			os.Exit(1)
		}
		imgurImage := imgurStruct.Link
	*/

	mastoImage, err := masto.UploadMedia(filename, "", "")
	if err != nil {
		fmt.Println("Failed to upload image to mastodon: ", err)
		os.Exit(1)
	}

	titleReddit := fmt.Sprintf("Posting cheetah pics every day until I run out — Day %d — %s", day, description)
	titleMasto := fmt.Sprintf("Day %d: %s\n#cheetah\n", day, description)

	curYear, curMonth, curDay := time.Now().Date()
	titleGemini := "# Cheetah a Day\n\n"
	linkGemini := fmt.Sprintf("=> D%03d.jpg %04d-%02d-%02d - Day %[1]d: %[5]s", day, curYear, curMonth, curDay, description)

	// do the final culminating posts
	// open old and new indexes
	geminiOrig, err := os.Open("/var/gemini/nytpu.com/cheetahs/index.gmi")
	if err != nil {
		fmt.Println("Failed to open file: ", err)
		os.Exit(1)
	}
	defer geminiOrig.Close()
	geminiNew, err := os.OpenFile("/var/gemini/nytpu.com/cheetahs/index.gmi.new", os.O_RDWR|os.O_CREATE, 0666)
	if err != nil {
		fmt.Println("Failed to open file: ", err)
		os.Exit(1)
	}
	defer geminiNew.Close()

	// write header and new link to new index
	io.WriteString(geminiNew, titleGemini)
	io.WriteString(geminiNew, linkGemini)

	// skip i lines in old file
	reader := bufio.NewReader(geminiOrig)
	total := 0
	for i := 0; i < 9; i++ {
		row, err := reader.ReadSlice('\n')
		if err != nil {
			fmt.Println("Failed to get skip line in file: ", err)
			os.Exit(1)
		}
		total += len(row)
	}
	_, err = geminiOrig.Seek(int64(total), io.SeekStart)
	if err != nil {
		fmt.Println("Failed to seek in file: ", err)
		os.Exit(1)
	}
	// copy the rest of old file
	_, err = io.Copy(geminiNew, geminiOrig)
	if err != nil {
		fmt.Println("Failed to update gemini file: ", err)
		os.Exit(1)
	}
	// move new to old once writing is confirmed to have been successful
	err = os.Rename("/var/gemini/nytpu.com/cheetahs/index.gmi.new", "/var/gemini/nytpu.com/cheetahs/index.gmi")
	if err != nil {
		fmt.Println("Failed to move file: ", err)
		os.Exit(1)
	}

	//reddit.PostLink("nytpu", titleReddit, mastoImage.URL)
	reddit.PostLink("Cheetahs", titleReddit, mastoImage.URL)
	masto.PostStatus(titleMasto, 0, []int64{mastoImage.ID}, false, "", "public")

	// write day.txt for next day
	df.Seek(0, io.SeekStart)
	_, err = fmt.Fprintf(df, "%03d\n", day+1)
	if err != nil {
		fmt.Printf("Failed to update file to day %03d: %v", day+1, err)
		os.Exit(1)
	}

	err = os.Rename(filename, fmt.Sprintf("/var/gemini/nytpu.com/cheetahs/D%03d.jpg", day))
	if err != nil {
		fmt.Printf("Failed to rename \"%v\": %v", filename, err)
	}
	/*err = os.Remove(descriptionFilename)
	if err != nil {
		fmt.Printf("Failed to remove \"%v\": %v", filename, err)
	}*/
}