Merge branch '6-show-error-if-dupes-exist-and-add-option-to-override' into 'develop'

Resolve "Show error if dupes exist and add option to override"

Closes #6

See merge request ekzyis/hnbot!5

.env.template

@@ -1,3 +1,3 @@
 SN_AUTH_COOKIE=
-DISCORD_WEBHOOK=
 DISCORD_TOKEN=
+DISCORD_CHANNEL_ID=

discord.go

@@ -1,68 +1,53 @@
 package main
 
 import (
-	"bytes"
-	"encoding/json"
+	"errors"
+	"fmt"
 	"log"
-	"net/http"
+	"strings"
 
 	"github.com/bwmarrin/discordgo"
+	"github.com/dustin/go-humanize"
 	"github.com/joho/godotenv"
 	"github.com/namsral/flag"
 )
 
 var (
-	DiscordWebhook string
-	DiscordToken   string
-	DiscordClient  *discordgo.Session
+	DiscordToken     string
+	dg               *discordgo.Session
+	DiscordChannelId string
 )
 
-type DiscordEmbedFooter struct {
-	Text    string `json:"text"`
-	IconUrl string `json:"icon_url"`
-}
-
-type DiscordEmbed struct {
-	Title     string             `json:"title"`
-	Url       string             `json:"url"`
-	Color     int                `json:"color"`
-	Footer    DiscordEmbedFooter `json:"footer"`
-	Timestamp string             `json:"timestamp"`
-}
-
-type DiscordWebhookPayload struct {
-	Embeds []DiscordEmbed `json:"embeds"`
-}
-
 func init() {
 	err := godotenv.Load()
 	if err != nil {
 		log.Fatal("Error loading .env file")
 	}
-	flag.StringVar(&DiscordWebhook, "DISCORD_WEBHOOK", "", "Webhook to send logs to discord")
 	flag.StringVar(&DiscordToken, "DISCORD_TOKEN", "", "Discord bot token")
+	flag.StringVar(&DiscordChannelId, "DISCORD_CHANNEL_ID", "", "Discord channel id")
 	flag.Parse()
-	if DiscordWebhook == "" {
-		log.Fatal("DISCORD_WEBHOOK not set")
-	}
 	if DiscordToken == "" {
 		log.Fatal("DISCORD_TOKEN not set")
 	}
+	if DiscordChannelId == "" {
+		log.Fatal("DISCORD_CHANNEL_ID not set")
+	}
 	initBot()
 }
 
 func initBot() {
 	var err error
-	DiscordClient, err = discordgo.New(DiscordToken)
+	dg, err = discordgo.New("Bot " + DiscordToken)
 	if err != nil {
 		log.Fatal("error creating discord session:", err)
 	}
-	DiscordClient.AddHandler(func(s *discordgo.Session, event *discordgo.Ready) {
+	dg.AddHandler(func(s *discordgo.Session, event *discordgo.Ready) {
 		log.Println("Logged in as", event.User.Username)
 	})
-	DiscordClient.AddHandler(onMessage)
-	DiscordClient.Identify.Intents = discordgo.IntentsGuildMessages | discordgo.IntentsMessageContent
-	err = DiscordClient.Open()
+	dg.AddHandler(onMessage)
+	dg.AddHandler(onMessageReact)
+	dg.Identify.Intents = discordgo.IntentsGuildMessages | discordgo.IntentsMessageContent | discordgo.IntentGuildMessageReactions
+	err = dg.Open()
 	if err != nil {
 		log.Fatal("error opening connection to discord: ", err, " -- Is your token correct?")
 	}
@@ -73,29 +58,110 @@ func onMessage(s *discordgo.Session, m *discordgo.MessageCreate) {
 	if m.Author.ID == s.State.User.ID {
 		return
 	}
-	id, err := ParseHackerNewsLink(m.Content)
+	hackerNewsId, err := ParseHackerNewsLink(m.Content)
+	if err != nil {
+		return
+	}
+	story := FetchStoryById(hackerNewsId)
+	_, err = PostStoryToStackerNews(&story, PostStoryOptions{SkipDupes: false})
+	if err != nil {
+		var dupesErr *DupesError
+		if errors.As(err, &dupesErr) {
+			SendDupesErrorToDiscord(hackerNewsId, dupesErr)
+		} else {
+			log.Fatal("unexpected error returned")
+		}
+	}
+}
+
+func onMessageReact(s *discordgo.Session, reaction *discordgo.MessageReactionAdd) {
+	if reaction.UserID == s.State.User.ID {
+		return
+	}
+	if reaction.Emoji.Name != "⏭️" {
+		return
+	}
+	m, err := s.ChannelMessage(reaction.ChannelID, reaction.MessageID)
+	if err != nil {
+		log.Println("error:", err)
+		return
+	}
+	if len(m.Embeds) == 0 {
+		return
+	}
+	embed := m.Embeds[0]
+	if !strings.Contains(embed.Title, "dupe(s) found for") {
+		return
+	}
+	id, err := ParseHackerNewsLink(embed.Footer.Text)
 	if err != nil {
 		return
 	}
 	story := FetchStoryById(id)
-	PostStoryToStackerNews(&story)
+	id, err = PostStoryToStackerNews(&story, PostStoryOptions{SkipDupes: true})
+	if err != nil {
+		log.Fatal("unexpected error returned")
+	}
 }
 
-func SendEmbedToDiscord(embed DiscordEmbed) {
-	bodyJSON, err := json.Marshal(
-		DiscordWebhookPayload{
-			Embeds: []DiscordEmbed{embed},
+func SendDupesErrorToDiscord(hackerNewsId int, dupesErr *DupesError) {
+	title := fmt.Sprintf("%d dupe(s) found for %s:", len(dupesErr.Dupes), dupesErr.Url)
+	color := 0xffc107
+	var fields []*discordgo.MessageEmbedField
+	for _, dupe := range dupesErr.Dupes {
+		fields = append(fields,
+			&discordgo.MessageEmbedField{
+				Name:   "Title",
+				Value:  dupe.Title,
+				Inline: false,
+			},
+			&discordgo.MessageEmbedField{
+				Name:   "Id",
+				Value:  StackerNewsItemLink(dupe.Id),
+				Inline: true,
+			},
+			&discordgo.MessageEmbedField{
+				Name:   "Url",
+				Value:  dupe.Url,
+				Inline: true,
+			},
+			&discordgo.MessageEmbedField{
+				Name:   "User",
+				Value:  dupe.User.Name,
+				Inline: true,
+			},
+			&discordgo.MessageEmbedField{
+				Name:   "Created",
+				Value:  humanize.Time(dupe.CreatedAt),
+				Inline: true,
+			},
+			&discordgo.MessageEmbedField{
+				Name:   "Sats",
+				Value:  fmt.Sprint(dupe.Sats),
+				Inline: true,
+			},
+			&discordgo.MessageEmbedField{
+				Name:   "Comments",
+				Value:  fmt.Sprint(dupe.NComments),
+				Inline: true,
+			},
+		)
+	}
+	embed := discordgo.MessageEmbed{
+		Title:  title,
+		Color:  color,
+		Fields: fields,
+		Footer: &discordgo.MessageEmbedFooter{
+			Text:    HackerNewsItemLink(hackerNewsId),
+			IconURL: "https://news.ycombinator.com/y18.gif",
 		},
-	)
+	}
+	SendEmbedToDiscord(&embed)
+}
+
+func SendEmbedToDiscord(embed *discordgo.MessageEmbed) {
+	_, err := dg.ChannelMessageSendEmbed(DiscordChannelId, embed)
 	if err != nil {
 		log.Fatal("Error during json.Marshal:", err)
 	}
-	req, err := http.NewRequest("POST", DiscordWebhook, bytes.NewBuffer(bodyJSON))
-	req.Header.Set("Content-Type", "application/json")
-	client := &http.Client{}
-	resp, err := client.Do(req)
-	if err != nil {
-		log.Println("Discord webhook error:", err)
-	}
-	defer resp.Body.Close()
 }

main.go

@@ -7,7 +7,7 @@ func main() {
 		stories := FetchHackerNewsTopStories()
 		filtered := CurateContentForStackerNews(&stories)
 		for _, story := range *filtered {
-			PostStoryToStackerNews(&story)
+			PostStoryToStackerNews(&story, PostStoryOptions{SkipDupes: false})
 		}
 		time.Sleep(time.Hour)
 	}

sn.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/bwmarrin/discordgo"
 	"github.com/dustin/go-humanize"
 	"github.com/joho/godotenv"
 	"github.com/namsral/flag"
@@ -18,10 +19,17 @@ type GraphQLPayload struct {
 	Variables map[string]interface{} `json:"variables,omitempty"`
 }
 
+type SnUser struct {
+	Name string `json:"name"`
+}
 type Dupe struct {
-	Id    int    `json:"id,string"`
-	Url   string `json:"url"`
-	Title string `json:"title"`
+	Id        int       `json:"id,string"`
+	Url       string    `json:"url"`
+	Title     string    `json:"title"`
+	User      SnUser    `json:"user"`
+	CreatedAt time.Time `json:"createdAt"`
+	Sats      int       `json:"sats"`
+	NComments int       `json:"ncomments"`
 }
 
 type DupesResponse struct {
@@ -30,6 +38,15 @@ type DupesResponse struct {
 	} `json:"data"`
 }
 
+type DupesError struct {
+	Url   string
+	Dupes []Dupe
+}
+
+func (e *DupesError) Error() string {
+	return fmt.Sprintf("%s has %d dupes", e.Url, len(e.Dupes))
+}
+
 type User struct {
 	Name string `json:"name"`
 }
@@ -123,6 +140,12 @@ func FetchStackerNewsDupes(url string) *[]Dupe {
 					id
 					url
 					title
+					user {
+						name
+					}
+					createdAt
+					sats
+					ncomments
 				}
 			}`,
 		Variables: map[string]interface{}{
@@ -141,11 +164,17 @@ func FetchStackerNewsDupes(url string) *[]Dupe {
 	return &dupesResp.Data.Dupes
 }
 
-func PostStoryToStackerNews(story *Story) {
-	dupes := FetchStackerNewsDupes(story.Url)
-	if len(*dupes) > 0 {
-		log.Printf("%s was already posted. Skipping.\n", story.Url)
-		return
+type PostStoryOptions struct {
+	SkipDupes bool
+}
+
+func PostStoryToStackerNews(story *Story, options PostStoryOptions) (int, error) {
+	if !options.SkipDupes {
+		dupes := FetchStackerNewsDupes(story.Url)
+		if len(*dupes) > 0 {
+			log.Printf("%s was already posted. Skipping.\n", story.Url)
+			return -1, &DupesError{story.Url, *dupes}
+		}
 	}
 
 	body := GraphQLPayload{
@@ -183,6 +212,7 @@ func PostStoryToStackerNews(story *Story) {
 		story.Score, story.Descendants,
 	)
 	CommentStackerNewsPost(comment, parentId)
+	return parentId, nil
 }
 
 func StackerNewsItemLink(id int) string {
@@ -213,15 +243,15 @@ func SendStackerNewsEmbedToDiscord(title string, id int) {
 	Timestamp := time.Now().Format(time.RFC3339)
 	url := StackerNewsItemLink(id)
 	color := 0xffc107
-	embed := DiscordEmbed{
+	embed := discordgo.MessageEmbed{
 		Title: title,
-		Url:   url,
+		URL:   url,
 		Color: color,
-		Footer: DiscordEmbedFooter{
+		Footer: &discordgo.MessageEmbedFooter{
 			Text:    "Stacker News",
-			IconUrl: "https://stacker.news/favicon.png",
+			IconURL: "https://stacker.news/favicon.png",
 		},
 		Timestamp: Timestamp,
 	}
-	SendEmbedToDiscord(embed)
+	SendEmbedToDiscord(&embed)
 }