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config.yml

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# Default ignored files
/shelf/
/workspace.xml
# Editor-based HTTP Client requests
/httpRequests/
# Datasource local storage ignored files
/dataSources/
/dataSources.local.xml

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="ProjectModuleManager">
<modules>
<module fileurl="file://$PROJECT_DIR$/.idea/publicprintbot.iml" filepath="$PROJECT_DIR$/.idea/publicprintbot.iml" />
</modules>
</component>
</project>

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.idea/publicprintbot.iml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<module type="WEB_MODULE" version="4">
<component name="Go" enabled="true" />
<component name="NewModuleRootManager">
<content url="file://$MODULE_DIR$" />
<orderEntry type="inheritedJdk" />
<orderEntry type="sourceFolder" forTests="false" />
</component>
</module>

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<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="VcsDirectoryMappings">
<mapping directory="" vcs="Git" />
</component>
</project>

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GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for the
specific requirements.
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU AGPL, see
<https://www.gnu.org/licenses/>.

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README.md Normal file
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# PublicPrintBot
PublicPrintBot is a Telegram bot that allows anyone (or selected users) to print their stickers, images and documents on Cat Printer.
It uses the [massivebox/go-catprinter](https://git.massivebox.net/massivebox/go-catprinter) library to communicate with the printer.
It's a great trick for cons, hacker camps etc. If you're running this anywhere, please [let me know](https://massivebox.net/contact)!
## Deploying
- Build the project with `go build .`
- `cp config.example.yml config.yml`
- Edit `config.yml` according to your needs
- Turn on your printer and run the executable. Root privileges might be needed.

37
auth.go Normal file
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package main
func inArray(id int64, ids []int64) bool {
for _, v := range ids {
if v == id {
return true
}
}
return false
}
func (ctx *Context) isAuth(id int64) bool {
if ctx.Settings.Admin == id {
return true
}
if len(ctx.Settings.Blacklist) > 0 {
if inArray(id, ctx.Settings.Blacklist) {
return false
}
}
if len(ctx.PassedPasswordCheck) > 0 {
if inArray(id, ctx.PassedPasswordCheck) {
return true
}
}
if len(ctx.Settings.Whitelist) > 0 {
if inArray(id, ctx.Settings.Whitelist) {
return true
} else {
return false
}
}
if ctx.Settings.Password == "" {
return true
}
return false
}

10
config.example.yml Normal file
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token: "whatever" # bot token obtained from @BotFather
maxRatio: 0.1 # if (width / height) < maxRatio then the sticker can't be printed. 0.1 means the image can be at most 1:10
maxQueueLength: 5
maxProjects: 5
admin: 1458106307 # user ID of the admin, obtained for example via @GetIDsBot
mac: "41:c2:6f:0f:90:c7" # MAC address of the printer
# password: hello # Users will need to input this before being able to print
# blacklist: [12345, 67890]
# whitelist: [12345, 67890]
# dontPrint: true # Enable if you don't want images to be actually printed (useful for debugging purposes)

26
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module git.massivebox.net/massivebox/publicprintbot
go 1.22.6
require (
git.massivebox.net/massivebox/go-catprinter v0.0.0-20240910204530-46926935fbe2
github.com/go-telegram-bot-api/telegram-bot-api/v5 v5.5.1
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c
)
require (
github.com/JuulLabs-OSS/cbgo v0.0.1 // indirect
github.com/disintegration/imaging v1.6.2 // indirect
github.com/go-ble/ble v0.0.0-20240122180141-8c5522f54333 // indirect
github.com/konsorten/go-windows-terminal-sequences v1.0.1 // indirect
github.com/makeworld-the-better-one/dither/v2 v2.4.0 // indirect
github.com/mattn/go-colorable v0.1.6 // indirect
github.com/mattn/go-isatty v0.0.12 // indirect
github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b // indirect
github.com/mgutz/logxi v0.0.0-20161027140823-aebf8a7d67ab // indirect
github.com/pkg/errors v0.8.1 // indirect
github.com/raff/goble v0.0.0-20190909174656-72afc67d6a99 // indirect
github.com/sirupsen/logrus v1.5.0 // indirect
golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8 // indirect
golang.org/x/sys v0.0.0-20211204120058-94396e421777 // indirect
)

56
go.sum Normal file
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@ -0,0 +1,56 @@
git.massivebox.net/massivebox/go-catprinter v0.0.0-20240910204530-46926935fbe2 h1:EbeytdOW6Ld3tgYjs9gegazyQiaFzhUdpj01Ay78Xwk=
git.massivebox.net/massivebox/go-catprinter v0.0.0-20240910204530-46926935fbe2/go.mod h1:fq6nR/TugqWYFg5saNiPTOe4spwHfMKGihdVA5RrYJU=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/JuulLabs-OSS/cbgo v0.0.1 h1:A5JdglvFot1J9qYR0POZ4qInttpsVPN9lqatjaPp2ro=
github.com/JuulLabs-OSS/cbgo v0.0.1/go.mod h1:L4YtGP+gnyD84w7+jN66ncspFRfOYB5aj9QSXaFHmBA=
github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
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/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1ei82L+c=
github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
github.com/go-ble/ble v0.0.0-20240122180141-8c5522f54333 h1:bQK6D51cNzMSTyAf0HtM30V2IbljHTDam7jru9JNlJA=
github.com/go-ble/ble v0.0.0-20240122180141-8c5522f54333/go.mod h1:fFJl/jD/uyILGBeD5iQ8tYHrPlJafyqCJzAyTHNJ1Uk=
github.com/go-telegram-bot-api/telegram-bot-api/v5 v5.5.1 h1:wG8n/XJQ07TmjbITcGiUaOtXxdrINDz1b0J1w0SzqDc=
github.com/go-telegram-bot-api/telegram-bot-api/v5 v5.5.1/go.mod h1:A2S0CWkNylc2phvKXWBBdD3K0iGnDBGbzRpISP2zBl8=
github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/makeworld-the-better-one/dither/v2 v2.4.0 h1:Az/dYXiTcwcRSe59Hzw4RI1rSnAZns+1msaCXetrMFE=
github.com/makeworld-the-better-one/dither/v2 v2.4.0/go.mod h1:VBtN8DXO7SNtyGmLiGA7IsFeKrBkQPze1/iAeM95arc=
github.com/mattn/go-colorable v0.1.6 h1:6Su7aK7lXmJ/U79bYtBjLNaha4Fs1Rg9plHpcH+vvnE=
github.com/mattn/go-colorable v0.1.6/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
github.com/mattn/go-isatty v0.0.12 h1:wuysRhFDzyxgEmMf5xjvJ2M9dZoWAXNNr5LSBS7uHXY=
github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b h1:j7+1HpAFS1zy5+Q4qx1fWh90gTKwiN4QCGoY9TWyyO4=
github.com/mgutz/ansi v0.0.0-20170206155736-9520e82c474b/go.mod h1:01TrycV0kFyexm33Z7vhZRXopbI8J3TDReVlkTgMUxE=
github.com/mgutz/logxi v0.0.0-20161027140823-aebf8a7d67ab h1:n8cgpHzJ5+EDyDri2s/GC7a9+qK3/YEGnBsd0uS/8PY=
github.com/mgutz/logxi v0.0.0-20161027140823-aebf8a7d67ab/go.mod h1:y1pL58r5z2VvAjeG1VLGc8zOQgSOzbKN7kMHPvFXJ+8=
github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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/raff/goble v0.0.0-20190909174656-72afc67d6a99 h1:JtoVdxWJ3tgyqtnPq3r4hJ9aULcIDDnPXBWxZsdmqWU=
github.com/raff/goble v0.0.0-20190909174656-72afc67d6a99/go.mod h1:CxaUhijgLFX0AROtH5mluSY71VqpjQBw9JXE2UKZmc4=
github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
github.com/sirupsen/logrus v1.5.0 h1:1N5EYkVAPEywqZRJd7cwnRtCb6xJx7NH3T3WUTF980Q=
github.com/sirupsen/logrus v1.5.0/go.mod h1:+F7Ogzej0PZc/94MaYx/nvG9jOFMD2osvC3s+Squfpo=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/urfave/cli v1.22.2/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8 h1:hVwzHzIUGRjiF7EcUjqNxk3NCfkPxbDKRdnNE1Rpg0U=
golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20211204120058-94396e421777 h1:QAkhGVjOxMa+n4mlsAWeAU+BMZmimQAaNiMu+iUi94E=
golang.org/x/sys v0.0.0-20211204120058-94396e421777/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

96
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package main
import (
tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
"strconv"
)
func (ctx *Context) handleUpdate(update tgbotapi.Update) {
if update.Message != nil {
ctx.messageHandler(update)
}
if update.CallbackQuery != nil {
ctx.callbackQueryHandler(update)
}
}
func (ctx *Context) callbackQueryHandler(update tgbotapi.Update) {
if !ctx.isAuth(update.CallbackQuery.From.ID) || len(update.CallbackQuery.Data) < 3 {
ctx.callbackQuery(update.CallbackQuery.ID, "❌ Unauthorized")
return
}
if update.CallbackQuery.Data == "next" {
ctx.Next <- update.CallbackQuery.From.ID
ctx.callbackQuery(update.CallbackQuery.ID, "✅ Confirmed")
return
}
queryType := update.CallbackQuery.Data[0]
queryCmd := rune(update.CallbackQuery.Data[1])
queryID, err := strconv.Atoi(update.CallbackQuery.Data[2:])
if err != nil {
return
}
if queryType == 'w' {
ctx.editWip(queryCmd, queryID, update.CallbackQuery.Message.Chat.ID, update.CallbackQuery.Message.MessageID, update.CallbackQuery.ID)
}
}
func (ctx *Context) messageHandler(update tgbotapi.Update) {
if ctx.isAuth(update.Message.From.ID) {
if update.Message.Sticker != nil {
ctx.createProject(update.Message.Sticker.FileID, update.Message.From.ID)
}
if update.Message.Photo != nil {
if len(update.Message.Photo) > 0 {
ctx.createProject(update.Message.Photo[len(update.Message.Photo)-1].FileID, update.Message.From.ID)
}
}
if update.Message.Document != nil {
ctx.createProject(update.Message.Document.FileID, update.Message.From.ID)
}
} else {
if update.Message.Sticker != nil || update.Message.Photo != nil || update.Message.Document != nil {
ctx.sendMessage(update.Message.From.ID, "🛑 You currently <b>don't have the authorization to print.</b> Check for a passcode near the printer and send it here as a message.")
}
}
if update.Message.Text == "/start" {
ctx.startHandler(update)
}
if update.Message.Text == ctx.Settings.Password && !ctx.isAuth(update.Message.From.ID) {
ctx.PassedPasswordCheck = append(ctx.PassedPasswordCheck, update.Message.From.ID)
ctx.sendMessage(update.Message.From.ID, "✅ Authorized")
}
if update.Message.From.ID == ctx.Settings.Admin && update.Message.Text == "/next" {
ctx.Next <- update.Message.From.ID
ctx.sendMessage(update.Message.From.ID, "sent, left: "+strconv.Itoa(len(ctx.Next)))
}
}
func (ctx *Context) startHandler(update tgbotapi.Update) {
txt := "👋 <b>Welcome to PublicPrintBot!</b> Send me a sticker, a photo or file and I will print it for you."
if !ctx.isAuth(update.Message.From.ID) {
txt += "\n\n🛑 You currently <b>don't have the authorization to print.</b> Check for a passcode near the printer and send it here as a message."
}
kb := tgbotapi.NewInlineKeyboardMarkup(
tgbotapi.NewInlineKeyboardRow(
tgbotapi.NewInlineKeyboardButtonURL("📚 Code", "https://git.massivebox.net/massivebox/publicprintbot"),
),
)
ctx.sendMessage(update.Message.From.ID, txt, kb)
}

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package main
import (
"log"
)
type JobChan chan int // receives project IDs
type NextChan chan int64 // receives user IDs for whoever clicks the next button
func (ctx *Context) waitForNext(userID int64) {
for n := range ctx.Next {
if n == userID || n == ctx.Settings.Admin {
return
}
}
}
func (ctx *Context) listenJobChannel() {
for jobID := range ctx.Queue {
job := ctx.Projects[jobID]
msgID := ctx.sendMessage(job.User, "🐾 <b>Your image is being printed!</b> Don't forget to <u>click the button below once you've cut your sticker off the roll</u>.", getNextKeyboard())
err := ctx.Client.Print(job.Og, job.Options, false)
if err != nil {
log.Println("Error printing image", err.Error())
ctx.sendMessage(job.User, "❗️ Got an error printing image, try again")
return
}
ctx.waitForNext(job.User)
ctx.editMessage(job.User, msgID, "🤗 All done, thanks!")
ctx.Projects[jobID] = nil
}
}

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package main
import (
"git.massivebox.net/massivebox/go-catprinter"
"github.com/go-telegram-bot-api/telegram-bot-api/v5"
"log"
)
type Context struct {
Settings *Settings
Bot *tgbotapi.BotAPI
Client *catprinter.Client
Queue JobChan
Next NextChan
Projects map[int]*Project
PassedPasswordCheck []int64
}
func main() {
log.Println("Starting...")
s := getSettings()
c, err := catprinter.NewClient()
if err != nil {
log.Fatalln("Error creating client", err)
}
log.Println("Connecting to printer...")
err = c.Connect(s.Mac)
if err != nil {
log.Fatalln("Error connecting to printer", err)
}
bot, err := tgbotapi.NewBotAPI(s.BotToken)
if err != nil {
log.Fatalln("Error creating bot API client", err)
}
u := tgbotapi.NewUpdate(0)
u.Timeout = 60
updates := bot.GetUpdatesChan(u)
c.Debug.DontPrint = s.DontPrint
ctx := &Context{
Settings: &s,
Bot: bot,
Client: c,
Queue: make(JobChan, s.MaxQueueLength),
Next: make(NextChan),
Projects: make(map[int]*Project),
PassedPasswordCheck: make([]int64, 0),
}
log.Println("Startup done. " +
"Listening for updates...")
go ctx.listenJobChannel()
for update := range updates {
go ctx.handleUpdate(update)
}
}

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package main
import (
"errors"
"git.massivebox.net/massivebox/go-catprinter"
"github.com/makeworld-the-better-one/dither/v2"
"image"
"log"
"strconv"
)
type Project struct {
Og image.Image
User int64
Options *catprinter.PrinterOptions
DitherStrength float32
}
func (ctx *Context) createProject(fileID string, userID int64) {
tmpMsgID := ctx.sendMessage(userID, "⏳ Processing...")
img, err := ctx.fileIDtoImage(fileID)
if err != nil {
if errors.Is(err, image.ErrFormat) {
ctx.sendMessage(userID, "🚫 File can't be parsed as an image. If you've sent a sticker, make sure it's not animated or part of an animated set.")
return
}
log.Println("Got error getting image from FileID", err)
ctx.sendMessage(userID, "🚫 Got an error obtaining image, try again")
return
}
if float32(img.Bounds().Dx())/float32(img.Bounds().Dy()) < ctx.Settings.MaxRatio {
ctx.sendMessage(userID, "🚫 Your image is too tall, please send a shorter image.")
return
}
wip := Project{
Og: img,
Options: catprinter.NewOptions(),
User: userID,
DitherStrength: 1,
}
putId := -1
for i := 0; i < ctx.Settings.MaxProjects; i++ {
if ctx.Projects[i] == nil {
putId = i
break
}
}
if putId == -1 {
ctx.sendMessage(userID, "🚫 We can't accept this project for now, try again later")
return
}
ctx.Projects[putId] = &wip
ctx.sendImage(userID, ctx.Client.FormatImage(wip.Og, wip.Options), getEditKeyboard(wip.Options, putId))
ctx.deleteMessage(tmpMsgID, userID)
}
func changeBlackPointOrDitherStrength(proj *Project, delta float32) bool {
if proj.Options.Dither() {
if (proj.DitherStrength < 0.1 && delta < 0) || (proj.DitherStrength > 0.9 && delta > 0) {
return false
}
proj.DitherStrength += delta
proj.Options.SetDitherAlgo(dither.ErrorDiffusionStrength(dither.FloydSteinberg, proj.DitherStrength))
} else {
if (proj.Options.BlackPoint() < 0.1 && delta < 0) || (proj.Options.BlackPoint() > 0.9 && delta > 0) {
return false
}
proj.Options.SetBlackPoint(proj.Options.BlackPoint() + delta)
}
return true
}
func (ctx *Context) editWip(queryCmd rune, projID int, userID int64, msgID int, cqID string) {
proj := ctx.Projects[projID]
if proj == nil {
ctx.callbackQuery(cqID, "🤨 Project not found", true)
return
}
if proj.User != userID {
ctx.callbackQuery(cqID, "🔒 Can't edit this project", true)
return
}
const limitTxt = "🛑 You've reached the limit"
switch queryCmd {
case 't': // toggle dithering
proj.Options.SetBlackPoint(0.5)
proj.DitherStrength = 1
proj.Options.SetDitherAlgo(dither.ErrorDiffusionStrength(dither.FloydSteinberg, proj.DitherStrength))
proj.Options.SetDither(!proj.Options.Dither())
break
case 'l': // lighter
done := changeBlackPointOrDitherStrength(proj, -0.1)
if !done {
ctx.callbackQuery(cqID, limitTxt, true)
return
}
break
case 'b': // darker
done := changeBlackPointOrDitherStrength(proj, +0.1)
if !done {
ctx.callbackQuery(cqID, limitTxt, true)
return
}
break
case 'p': // print
if len(ctx.Queue) >= ctx.Settings.MaxQueueLength {
ctx.callbackQuery(cqID, "🛑 There are already too many projects in queue, please wait...", true)
return
}
ctx.Queue <- projID
ctx.callbackQuery(cqID, "🖨 Waiting to print... There is/are "+strconv.Itoa(len(ctx.Queue))+" project(s) in queue before you.", true)
ctx.editImage(userID, msgID, ctx.Client.FormatImage(proj.Og, proj.Options))
return
case 'd': // discard
ctx.Projects[projID] = nil
ctx.callbackQuery(cqID, "🗑 Project discarded", true)
ctx.deleteMessage(msgID, userID)
return
}
ctx.callbackQuery(cqID, "⏳ Loading...")
ctx.editImage(userID, msgID, ctx.Client.FormatImage(proj.Og, proj.Options), getEditKeyboard(proj.Options, projID))
}

37
settings.go Normal file
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package main
import (
"gopkg.in/yaml.v3"
"log"
"os"
)
type Settings struct {
BotToken string `yaml:"token"`
MaxRatio float32 `yaml:"maxRatio"`
MaxQueueLength int `yaml:"maxQueueLength"`
MaxProjects int `yaml:"maxProjects"`
Admin int64 `yaml:"admin"`
Password string `yaml:"password"`
Blacklist []int64 `yaml:"blacklist"`
Whitelist []int64 `yaml:"whitelist"`
Mac string `yaml:"mac"`
DontPrint bool `yaml:"dontPrint"`
}
func getSettings() Settings {
file, err := os.ReadFile("./config.yml")
if err != nil {
log.Fatalln("Error reading config", err)
}
var s = Settings{}
err = yaml.Unmarshal(file, &s)
if err != nil {
log.Fatalln("Error parsing config", err)
}
return s
}

202
telegram.go Normal file
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package main
import (
"bytes"
"git.massivebox.net/massivebox/go-catprinter"
tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
_ "golang.org/x/image/webp"
"image"
_ "image/gif"
_ "image/jpeg"
"image/png"
_ "image/png"
"io"
"log"
"net/http"
"strconv"
)
func (ctx *Context) sendMessage(chatID int64, text string, keyboard ...tgbotapi.InlineKeyboardMarkup) int {
msg := tgbotapi.NewMessage(chatID, text)
msg.ParseMode = tgbotapi.ModeHTML
if len(keyboard) > 0 {
msg.ReplyMarkup = &keyboard[0]
}
sent, err := ctx.Bot.Send(msg)
if err != nil {
log.Println("Couldn't send message to user", chatID, err.Error())
}
return sent.MessageID
}
func (ctx *Context) sendImage(chatID int64, img image.Image, keyboard ...tgbotapi.InlineKeyboardMarkup) {
fImg, err := imageToFileBytes(img)
if err != nil {
log.Println("Couldn't encode image to send", chatID, err.Error())
return
}
msg := tgbotapi.NewPhoto(chatID, fImg)
if len(keyboard) > 0 {
msg.ReplyMarkup = &keyboard[0]
}
_, err = ctx.Bot.Send(msg)
if err != nil {
log.Println("Couldn't send image to user", chatID, err.Error())
}
}
func (ctx *Context) editImage(chatID int64, msgId int, img image.Image, keyboard ...tgbotapi.InlineKeyboardMarkup) {
fImg, err := imageToFileBytes(img)
if err != nil {
log.Println("Couldn't encode image to edit", chatID, err.Error())
return
}
msg := tgbotapi.EditMessageMediaConfig{
BaseEdit: tgbotapi.BaseEdit{
ChatID: chatID,
MessageID: msgId,
},
Media: tgbotapi.NewInputMediaPhoto(fImg),
}
if len(keyboard) > 0 {
msg.BaseEdit.ReplyMarkup = &keyboard[0]
}
_, err = ctx.Bot.Send(msg)
if err != nil {
log.Println("Couldn't send image edit to user", chatID, err.Error())
}
}
func (ctx *Context) editMessage(chatID int64, msgId int, text string, keyboard ...tgbotapi.InlineKeyboardMarkup) {
msg := tgbotapi.NewEditMessageText(chatID, msgId, text)
msg.ParseMode = tgbotapi.ModeHTML
if len(keyboard) > 0 {
msg.ReplyMarkup = &keyboard[0]
}
_, err := ctx.Bot.Send(msg)
if err != nil {
log.Println("Couldn't send edit to user", chatID, err.Error())
}
}
func (ctx *Context) callbackQuery(cqID string, text string, alert ...bool) {
var showAlert = false
if len(alert) > 0 {
showAlert = alert[0]
}
_, err := ctx.Bot.Request(tgbotapi.CallbackConfig{
CallbackQueryID: cqID,
Text: text,
ShowAlert: showAlert,
})
if err != nil {
log.Println("Couldn't send callback", cqID, err.Error())
}
}
func (ctx *Context) deleteMessage(msgID int, chatID int64) {
_, err := ctx.Bot.Request(tgbotapi.DeleteMessageConfig{
MessageID: msgID,
ChatID: chatID,
})
if err != nil {
log.Println("Couldn't send delete to user", chatID, err.Error())
}
}
func (ctx *Context) fileIDtoImage(fileID string) (image.Image, error) {
directURL, err := ctx.Bot.GetFileDirectURL(fileID)
if err != nil {
return nil, err
}
resp, err := http.Get(directURL)
if err != nil {
return nil, err
}
defer resp.Body.Close()
imgData, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
img, _, err := image.Decode(bytes.NewReader(imgData))
if err != nil {
return nil, err
}
return img, nil
}
func imageToFileBytes(img image.Image) (tgbotapi.FileBytes, error) {
buf := new(bytes.Buffer)
err := png.Encode(buf, img)
if err != nil {
return tgbotapi.FileBytes{}, err
}
return tgbotapi.FileBytes{
Bytes: buf.Bytes(),
Name: "img.png",
}, nil
}
func getEditKeyboard(opts *catprinter.PrinterOptions, projectID int) tgbotapi.InlineKeyboardMarkup {
var (
emoji = '❌'
wl = "⬜️ Lighter"
wb = "⬛️ Darker"
)
if opts.Dither() {
emoji = '✅'
wl = "⬛️ Lower Strength"
wb = "⬜️ Higher Strength"
}
pid := strconv.Itoa(projectID)
return tgbotapi.NewInlineKeyboardMarkup(
tgbotapi.NewInlineKeyboardRow(
tgbotapi.NewInlineKeyboardButtonData(string(emoji)+" Dithering", "wt"+pid),
),
tgbotapi.NewInlineKeyboardRow(
tgbotapi.NewInlineKeyboardButtonData(wl, "wl"+pid),
tgbotapi.NewInlineKeyboardButtonData(wb, "wb"+pid),
),
tgbotapi.NewInlineKeyboardRow(
tgbotapi.NewInlineKeyboardButtonData("🖨 Print", "wp"+pid),
tgbotapi.NewInlineKeyboardButtonData("🗑 Discard", "wd"+pid),
),
)
}
func getNextKeyboard() tgbotapi.InlineKeyboardMarkup {
return tgbotapi.NewInlineKeyboardMarkup(
tgbotapi.NewInlineKeyboardRow(
tgbotapi.NewInlineKeyboardButtonData("✅ I have obtained my sticker", "next"),
),
)
}