.env.template

@@ -0,0 +1 @@
+NEXT_AUTH_CSRF_TOKEN=

.gitignore

@@ -3,4 +3,3 @@
 
 # go executable
 hnbot
-hnbot.sqlite3

README.md

@@ -1,11 +1,7 @@
 # hnbot
 
-> Hello, I am a bot posting top stories from HN.
+> Hello, I am a bot crossposting top posts from HN.
 >
-> My original mission was to orange-pill HN by offering the OPs on HN to claim the sats their stories received here.
-However, my comments were shadowbanned and ultimately not approved by dang, the site admin.
-See this thread: [#164155](https://stacker.news/items/164155)
->
-> If you are one of these OPs and want to claim your sats, reply to this bio and we will find a solution!
+> I curate content to only post stuff which could be interesting for the SN community on a best-efforts basis.
 
--- https://stacker.news/hn
+-- https://stacker.news/items/161788

db/db.go

@@ -1,96 +0,0 @@
-package db
-
-import (
-	"database/sql"
-	"fmt"
-	"log"
-
-	"github.com/ekzyis/hnbot/hn"
-	_ "github.com/mattn/go-sqlite3"
-)
-
-var (
-	_db *sql.DB
-)
-
-func init() {
-	var err error
-	_db, err = sql.Open("sqlite3", "hnbot.sqlite3")
-	if err != nil {
-		log.Fatal(err)
-	}
-	migrate(_db)
-}
-
-func Query(query string, args ...interface{}) (*sql.Rows, error) {
-	return _db.Query(query, args...)
-}
-
-func migrate(db *sql.DB) {
-	if _, err := db.Exec(`
-		CREATE TABLE IF NOT EXISTS hn_items (
-			id INTEGER NOT NULL,
-			created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
-			time TIMESTAMP WITH TIMEZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
-			title TEXT NOT NULL,
-			url TEXT,
-			author TEXT NOT NULL,
-			ndescendants INTEGER NOT NULL,
-			score INTEGER NOT NULL,
-			rank INTEGER NOT NULL,
-			PRIMARY KEY (id, created_at)
-		);
-	`); err != nil {
-		err = fmt.Errorf("error during migration: %w", err)
-		log.Fatal(err)
-	}
-	if _, err := db.Exec(`
-		CREATE TABLE IF NOT EXISTS sn_items (
-			id INTEGER NOT NULL,
-			created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
-			hn_id INTEGER NOT NULL REFERENCES hn_items(id),
-			PRIMARY KEY (id, hn_id)
-		);
-	`); err != nil {
-		err = fmt.Errorf("error during migration: %w", err)
-		log.Fatal(err)
-	}
-}
-
-func ItemHasComment(parentId int) bool {
-	var count int
-	err := _db.QueryRow(`SELECT COUNT(1) FROM comments WHERE parent_id = ?`, parentId).Scan(&count)
-	if err != nil {
-		err = fmt.Errorf("error during item check: %w", err)
-		log.Fatal(err)
-	}
-	return count > 0
-}
-
-func SaveHnItems(story *[]hn.Item) error {
-	for i, s := range *story {
-		if err := SaveHnItem(&s, i+1); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-func SaveHnItem(s *hn.Item, rank int) error {
-	if _, err := _db.Exec(`
-			INSERT INTO hn_items(id, time, title, url, author, ndescendants, score, rank)
-			VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
-		s.ID, s.Time, s.Title, s.Url, s.By, s.Descendants, s.Score, rank); err != nil {
-		err = fmt.Errorf("error during item insert: %w", err)
-		return err
-	}
-	return nil
-}
-
-func SaveSnItem(id int, hnId int) error {
-	if _, err := _db.Exec(`INSERT INTO sn_items(id, hn_id) VALUES (?, ?)`, id, hnId); err != nil {
-		err = fmt.Errorf("error during sn item insert: %w", err)
-		return err
-	}
-	return nil
-}

go.mod

@@ -1,12 +1,12 @@
-module github.com/ekzyis/hnbot
+module gitlab.com/ekzyis/hnbot
 
 go 1.20
 
 require (
-	github.com/dustin/go-humanize v1.0.1
-	github.com/ekzyis/snappy v0.8.0
-	github.com/joho/godotenv v1.5.1
-	github.com/mattn/go-sqlite3 v1.14.22
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
+	github.com/namsral/flag v1.7.4-pre // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.8.2 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
-
-require gopkg.in/guregu/null.v4 v4.0.0 // indirect

go.sum

@@ -1,10 +1,20 @@
-github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
-github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
-github.com/ekzyis/snappy v0.8.0 h1:e7dRR384XJgNYa1FWNIZmqITSHOSanteBFXQJPfcQwg=
-github.com/ekzyis/snappy v0.8.0/go.mod h1:UksYI0dU0+cnzz0LQjWB1P0QQP/ghx47e4atP99a5Lk=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
 github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
-github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
-github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
-gopkg.in/guregu/null.v4 v4.0.0 h1:1Wm3S1WEA2I26Kq+6vcW+w0gcDo44YKYD7YIEJNHDjg=
-gopkg.in/guregu/null.v4 v4.0.0/go.mod h1:YoQhUrADuG3i9WqesrCmpNRwm1ypAgSHYqoOcTu/JrI=
+github.com/namsral/flag v1.7.4-pre h1:b2ScHhoCUkbsq0d2C15Mv+VU8bl8hAXV8arnWiOHNZs=
+github.com/namsral/flag v1.7.4-pre/go.mod h1:OXldTctbM6SWH1K899kPZcf65KxJiD7MsceFUpB5yDo=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
+github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

hn.go

@@ -0,0 +1,70 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+)
+
+type ItemID = int
+
+type Story struct {
+	ID          ItemID
+	By          string // username of author
+	Time        int    // UNIX timestamp
+	Descendants int    // number of comments
+	Kids        []ItemID
+	Score       int
+	Title       string
+	Url         string
+}
+
+func fetchTopStoriesFromHN() []Story {
+	// API docs: https://github.com/HackerNews/API
+
+	url := "https://hacker-news.firebaseio.com/v0/topstories.json"
+	resp, err := http.Get(url)
+	if err != nil {
+		log.Fatal("Error fetching top stories:", err)
+	}
+	defer resp.Body.Close()
+	log.Printf("GET %s %d\n", url, resp.StatusCode)
+
+	var ids []int
+	err = json.NewDecoder(resp.Body).Decode(&ids)
+	if err != nil {
+		log.Fatal("Error decoding top stories JSON:", err)
+	}
+
+	// we are only interested in the first page of top stories
+	const limit = 30
+	ids = ids[:limit]
+
+	var stories [limit]Story
+	for i, id := range ids {
+		story := fetchStoryByID(id)
+		stories[i] = story
+	}
+
+	// Can't return [30]Story as []Story so we copy the array
+	return stories[:]
+}
+
+func fetchStoryByID(id ItemID) Story {
+	url := fmt.Sprintf("https://hacker-news.firebaseio.com/v0/item/%d.json", id)
+	resp, err := http.Get(url)
+	if err != nil {
+		log.Fatal("Error fetching story:", err)
+	}
+	defer resp.Body.Close()
+	log.Printf("GET %s %d\n", url, resp.StatusCode)
+
+	var story Story
+	err = json.NewDecoder(resp.Body).Decode(&story)
+	if err != nil {
+		log.Fatal("Error decoding story JSON:", err)
+	}
+
+	return story
+}

hn/hn.go

@@ -1,105 +0,0 @@
-package hn
-
-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"log"
-	"net/http"
-	"regexp"
-	"strconv"
-)
-
-type Item struct {
-	ID          int
-	By          string // username of author
-	Time        int    // UNIX timestamp
-	Descendants int    // number of comments
-	Kids        []int
-	Score       int
-	Title       string
-	Url         string
-}
-
-var (
-	hnUrl         = "https://news.ycombinator.com"
-	hnFirebaseUrl = "https://hacker-news.firebaseio.com/v0"
-	hnLinkRegexp  = regexp.MustCompile(`(?:https?:\/\/)?news\.ycombinator\.com\/item\?id=([0-9]+)`)
-)
-
-func FetchTopItems() ([]Item, error) {
-	log.Println("[hn] fetch top items ...")
-
-	// API docs: https://github.com/HackerNews/API
-	url := fmt.Sprintf("%s/topstories.json", hnFirebaseUrl)
-	resp, err := http.Get(url)
-	if err != nil {
-		return nil, fmt.Errorf("error fetching HN top stories %w:", err)
-	}
-	defer resp.Body.Close()
-
-	var ids []int
-	err = json.NewDecoder(resp.Body).Decode(&ids)
-	if err != nil {
-		return nil, fmt.Errorf("error decoding HN top stories JSON: %w", err)
-	}
-
-	// we are only interested in the first page of top stories
-	const limit = 30
-	ids = ids[:limit]
-
-	var stories [limit]Item
-	for i, id := range ids {
-		var item Item
-		err := FetchItemById(id, &item)
-		if err != nil {
-			return nil, err
-		}
-		stories[i] = item
-	}
-
-	log.Println("[hn] fetch top items ... OK")
-	// Can't return [30]Item as []Item so we copy the array
-	return stories[:], nil
-}
-
-func FetchItemById(id int, hnItem *Item) error {
-	// log.Printf("[hn] fetch HN item %d ...\n", id)
-
-	url := fmt.Sprintf("https://hacker-news.firebaseio.com/v0/item/%d.json", id)
-	resp, err := http.Get(url)
-	if err != nil {
-		err = fmt.Errorf("error fetching HN item %d: %w", id, err)
-		return err
-	}
-	defer resp.Body.Close()
-
-	err = json.NewDecoder(resp.Body).Decode(&hnItem)
-	if err != nil {
-		err := fmt.Errorf("error decoding JSON for HN item %d: %w", id, err)
-		return err
-	}
-
-	// log.Printf("[hn] fetch HN item %d ... OK\n", id)
-	return nil
-}
-
-func ParseLink(link string) (int, error) {
-	match := hnLinkRegexp.FindStringSubmatch(link)
-	if len(match) == 0 {
-		return -1, errors.New("not a hacker news link")
-	}
-	id, err := strconv.Atoi(match[1])
-	if err != nil {
-		return -1, errors.New("integer conversion to string failed")
-	}
-	return id, nil
-}
-
-func UserLink(user string) string {
-	return fmt.Sprintf("%s/user?id=%s", hnUrl, user)
-}
-
-func ItemLink(id int) string {
-	return fmt.Sprintf("%s/item?id=%d", hnUrl, id)
-}

main.go

@@ -1,77 +1,32 @@
 package main
 
 import (
-	"errors"
 	"log"
-	"time"
 
-	"github.com/ekzyis/hnbot/db"
-	"github.com/ekzyis/hnbot/hn"
-	sn "github.com/ekzyis/hnbot/sn"
 	"github.com/joho/godotenv"
+	"github.com/namsral/flag"
 )
 
-func SyncHnItemsToDb() {
-	for {
-		now := time.Now()
-		dur := now.Truncate(time.Minute).Add(time.Minute).Sub(now)
-		log.Println("[hn] sleeping for", dur.Round(time.Second))
-		time.Sleep(dur)
+var (
+	SnApiToken string
+)
 
-		stories, err := hn.FetchTopItems()
-		if err != nil {
-			log.Println(err)
-			continue
-		}
-		if err := db.SaveHnItems(&stories); err != nil {
-			log.Println(err)
-			continue
-		}
+func init() {
+	err := godotenv.Load()
+	if err != nil {
+		log.Fatal("Error loading .env file")
+	}
+	flag.StringVar(&SnApiToken, "NEXT_AUTH_CSRF_TOKEN", "", "Token required for authorizing requests to stacker.news/api/graphql")
+	flag.Parse()
+	if SnApiToken == "" {
+		log.Fatal("NEXT_AUTH_CSRF_TOKEN not set")
 	}
 }
 
 func main() {
-	if err := godotenv.Load(); err != nil {
-		log.Fatal(err)
-	}
-
-	// fetch HN front page every minute in the background and store state in db
-	go SyncHnItemsToDb()
-
-	// check every 15 minutes if there is now a HN item that is worth posting to SN
-	for {
-		var (
-			filtered *[]hn.Item
-			err      error
-		)
-
-		now := time.Now()
-		dur := now.Truncate(time.Minute).Add(15 * time.Minute).Sub(now)
-		log.Println("[sn] sleeping for", dur.Round(time.Second))
-		time.Sleep(dur)
-
-		if filtered, err = sn.CurateContent(); err != nil {
-			log.Println(err)
-			continue
-		}
-
-		log.Printf("[sn] found %d item(s) to post\n", len(*filtered))
-
-		for _, item := range *filtered {
-			_, err := sn.Post(&item, sn.PostOptions{SkipDupes: false})
-			if err != nil {
-				var dupesErr *sn.DupesError
-				if errors.As(err, &dupesErr) {
-					log.Println(dupesErr)
-					parentId := dupesErr.Dupes[0].Id
-					if err := db.SaveSnItem(parentId, item.ID); err != nil {
-						log.Println(err)
-					}
-					continue
-				}
-				log.Println(err)
-				continue
-			}
-		}
+	stories := fetchTopStoriesFromHN()
+	filtered := filterByRelevanceForSN(&stories)
+	for _, story := range *filtered {
+		postToSN(&story)
 	}
 }

sn.go

@@ -0,0 +1,120 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+)
+
+type GraphQLPayload struct {
+	Query     string                 `json:"query"`
+	Variables map[string]interface{} `json:"variables,omitempty"`
+}
+
+type Dupe struct {
+	Id    int    `json:"id,string"`
+	Url   string `json:"url"`
+	Title string `json:"title"`
+}
+
+type DupesResponse struct {
+	Data struct {
+		Dupes []Dupe `json:"dupes"`
+	} `json:"data"`
+}
+
+func filterByRelevanceForSN(stories *[]Story) *[]Story {
+	// TODO: filter by relevance
+
+	slice := (*stories)[0:1]
+	return &slice
+}
+
+func fetchDupes(url string) *[]Dupe {
+	body := GraphQLPayload{
+		Query: `
+			query Dupes($url: String!) {
+				dupes(url: $url) {
+					id
+					url
+					title
+				}
+			}`,
+		Variables: map[string]interface{}{
+			"url": url,
+		},
+	}
+
+	bodyJSON, err := json.Marshal(body)
+	if err != nil {
+		log.Fatal("Error during json.Marshal:", err)
+	}
+
+	apiUrl := "https://stacker.news/api/graphql"
+	req, err := http.NewRequest("POST", apiUrl, bytes.NewBuffer(bodyJSON))
+	if err != nil {
+		panic(err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Cookie", fmt.Sprintf("__Host-next-auth.csrf-token=%s", SnApiToken))
+
+	client := http.DefaultClient
+	resp, err := client.Do(req)
+	if err != nil {
+		panic(err)
+	}
+	defer resp.Body.Close()
+
+	var dupesResp DupesResponse
+	err = json.NewDecoder(resp.Body).Decode(&dupesResp)
+	if err != nil {
+		log.Fatal("Error decoding dupes JSON:", err)
+	}
+
+	return &dupesResp.Data.Dupes
+}
+
+func postToSN(story *Story) {
+	dupes := fetchDupes(story.Url)
+	if len(*dupes) > 0 {
+		return
+	}
+
+	body := GraphQLPayload{
+		Query: `
+            mutation upsertLink($url: String!, $title: String!) {
+                upsertLink(url: $url, title: $title) {
+                    id
+                }
+            }
+        `,
+		Variables: map[string]interface{}{
+			"url":   story.Url,
+			"title": story.Title,
+		},
+	}
+
+	bodyJSON, err := json.Marshal(body)
+	if err != nil {
+		log.Fatal("Error during json.Marshal:", err)
+	}
+
+	apiUrl := "https://stacker.news/api/graphql"
+	req, err := http.NewRequest("POST", apiUrl, bytes.NewBuffer(bodyJSON))
+	if err != nil {
+		panic(err)
+	}
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Cookie", fmt.Sprintf("__Host-next-auth.csrf-token=%s", SnApiToken))
+
+	client := http.DefaultClient
+	resp, err := client.Do(req)
+	if err != nil {
+		panic(err)
+	}
+	defer resp.Body.Close()
+
+	log.Printf("POST %s %d\n", apiUrl, resp.StatusCode)
+}

sn/sn.go

@@ -1,102 +0,0 @@
-package sn
-
-import (
-	"database/sql"
-	"fmt"
-	"log"
-	"time"
-
-	"github.com/dustin/go-humanize"
-	"github.com/ekzyis/hnbot/db"
-	"github.com/ekzyis/hnbot/hn"
-	sn "github.com/ekzyis/snappy"
-)
-
-type DupesError = sn.DupesError
-
-func CurateContent() (*[]hn.Item, error) {
-	var (
-		rows *sql.Rows
-		err  error
-	)
-	if rows, err = db.Query(`
-		SELECT t.id, time, title, url, author, score, ndescendants
-		FROM (
-			SELECT id, MIN(created_at) AS start, MAX(created_at) AS end
-			FROM hn_items
-			WHERE rank = 1 AND id NOT IN (SELECT hn_id FROM sn_items) AND length(title) >= 5
-			GROUP BY id
-			HAVING unixepoch(end) - unixepoch(start) >= 3600
-			ORDER BY time ASC
-			LIMIT 1
-		) t JOIN hn_items ON t.id = hn_items.id AND t.end = hn_items.created_at;
-	`); err != nil {
-		err = fmt.Errorf("error querying hn_items: %w", err)
-		return nil, err
-	}
-	defer rows.Close()
-
-	var items []hn.Item
-	for rows.Next() {
-		var item hn.Item
-		if err = rows.Scan(&item.ID, &item.Time, &item.Title, &item.Url, &item.By, &item.Score, &item.Descendants); err != nil {
-			err = fmt.Errorf("error scanning hn_items: %w", err)
-			return nil, err
-		}
-		items = append(items, item)
-	}
-	if err = rows.Err(); err != nil {
-		err = fmt.Errorf("error iterating hn_items: %w", err)
-		return nil, err
-	}
-	return &items, nil
-}
-
-type PostOptions struct {
-	SkipDupes bool
-}
-
-func Post(item *hn.Item, options PostOptions) (int, error) {
-	c := sn.NewClient()
-	url := item.Url
-	if url == "" {
-		url = hn.ItemLink(item.ID)
-	}
-	log.Printf("post to SN: %s ...\n", url)
-
-	if !options.SkipDupes {
-		dupes, err := c.Dupes(url)
-		if err != nil {
-			return -1, err
-		}
-		if len(*dupes) > 0 {
-			return -1, &sn.DupesError{Url: url, Dupes: *dupes}
-		}
-	}
-
-	title := item.Title
-	if len(title) > 80 {
-		title = title[0:80]
-	}
-
-	comment := fmt.Sprintf(
-		"This link was posted by [%s](%s) %s on [HN](%s). It received %d points and %d comments.",
-		item.By,
-		hn.UserLink(item.By),
-		humanize.Time(time.Unix(int64(item.Time), 0)),
-		hn.ItemLink(item.ID),
-		item.Score, item.Descendants,
-	)
-
-	parentId, err := c.PostLink(url, title, comment, "tech")
-	if err != nil {
-		return -1, fmt.Errorf("error posting link: %w", err)
-	}
-
-	log.Printf("post to SN: %s ... OK \n", url)
-	if err := db.SaveSnItem(parentId, item.ID); err != nil {
-		return -1, err
-	}
-
-	return parentId, nil
-}

sn_test.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFetchDupes(t *testing.T) {
+	// TODO: mock HTTP request
+	url := "https://en.wikipedia.org/wiki/Dishwasher_salmon"
+	dupes := fetchDupes(url)
+	assert.NotEmpty(t, *dupes, "Expected at least one duplicate")
+}