mirror of https://github.com/velour/catbase.git
491 lines
12 KiB
Go
491 lines
12 KiB
Go
package meme
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"image"
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"image/color"
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"image/draw"
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"image/png"
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"net/http"
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"net/url"
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"path"
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"regexp"
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"strings"
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"time"
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"github.com/fogleman/gg"
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"github.com/google/uuid"
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"github.com/nfnt/resize"
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"github.com/rs/zerolog/log"
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"github.com/velour/catbase/bot"
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"github.com/velour/catbase/bot/msg"
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"github.com/velour/catbase/bot/user"
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"github.com/velour/catbase/config"
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)
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type MemePlugin struct {
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bot bot.Bot
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c *config.Config
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images cachedImages
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}
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type cachedImage struct {
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created time.Time
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repr []byte
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}
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type memeText struct {
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XPerc float64 `json:"x"`
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YPerc float64 `json:"y"`
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Text string `json:"t",omitempty`
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Caps bool `json:"c"`
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}
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var horizon = 24 * 7
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type cachedImages map[string]*cachedImage
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func (ci cachedImages) cleanup() {
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for key, img := range ci {
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if time.Now().After(img.created.Add(time.Hour * time.Duration(horizon))) {
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delete(ci, key)
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}
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}
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}
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func New(b bot.Bot) *MemePlugin {
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mp := &MemePlugin{
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bot: b,
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c: b.Config(),
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images: make(cachedImages),
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}
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horizon = mp.c.GetInt("meme.horizon", horizon)
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b.RegisterRegexCmd(mp, bot.Message, cmdMatch, mp.message)
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b.Register(mp, bot.Help, mp.help)
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mp.registerWeb(b.DefaultConnector())
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return mp
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}
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var cmdMatch = regexp.MustCompile(`(?i)^meme (?P<content>.+)$`)
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func (p *MemePlugin) message(r bot.Request) bool {
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minusMeme := r.Values["content"]
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log.Debug().Msgf("Calling sendMeme with text: %s", minusMeme)
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p.sendMeme(r.Conn, r.Msg.Channel, r.Msg.ChannelName, r.Msg.ID, r.Msg.User, minusMeme)
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return true
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}
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func (p *MemePlugin) help(c bot.Connector, kind bot.Kind, message msg.Message, args ...interface{}) bool {
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webRoot := p.c.Get("BaseURL", "https://catbase.velour.ninja")
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formats := p.c.GetMap("meme.memes", defaultFormats)
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msg := "Use `/meme [format] [text]` to create a meme.\nI know the following formats:"
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msg += "\n`[format]` can be a URL"
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msg += fmt.Sprintf("\nor a format from the list of %d pre-made memes listed on the website", len(formats))
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msg += fmt.Sprintf("\nHead over to %s/meme to view and add new meme formats", webRoot)
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msg += "\nYou can use `_` as a placeholder for empty text and a newline (|| on Discord) to separate top vs bottom."
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msg += "\nOR you can configure the text yourself with JSON. Send a code quoted message like:"
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msg += "```/meme doge `[{\"x\": 0.2, \"y\": 0.1, \"t\": \"such image\"},{\"x\": 0.7, \"y\": 0.5, \"t\": \"much meme\"},{\"x\": 0.4, \"y\": 0.8, \"t\": \"wow\"}]` ```"
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p.bot.Send(c, bot.Message, message.Channel, msg)
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return true
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}
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func (p *MemePlugin) bully(c bot.Connector, format, id string) (image.Image, string) {
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bullyIcon := ""
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for _, bully := range p.c.GetArray("meme.bully", []string{}) {
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if format == bully {
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if u, err := c.Profile(bully); err == nil {
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bullyIcon = u.Icon
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} else {
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log.Debug().Err(err).Msgf("could not get profile for %s", format)
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}
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formats := p.c.GetMap("meme.memes", defaultFormats)
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format = randEntry(formats)
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log.Debug().Msgf("After bullying:\nFormat: %s", format)
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break
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}
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}
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if u, err := c.Profile(id); bullyIcon == "" && err == nil {
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if u.IconImg != nil {
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return u.IconImg, format
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}
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bullyIcon = u.Icon
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}
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u, err := url.Parse(bullyIcon)
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if err != nil {
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log.Error().Err(err).Msg("error with bully URL")
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}
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bullyImg, err := DownloadTemplate(u)
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if err != nil {
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log.Error().Err(err).Msg("error downloading bully icon")
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}
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return bullyImg, format
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}
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func (p *MemePlugin) sendMeme(c bot.Connector, channel, channelName, msgID string, from *user.User, text string) {
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parts := strings.SplitN(text, " ", 2)
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if len(parts) != 2 {
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log.Debug().Msgf("Bad meme request: %v, %v", from, text)
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p.bot.Send(c, bot.Message, channel, fmt.Sprintf("%v tried to send me a bad meme request.", from.Name))
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return
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}
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isCmd, message := bot.IsCmd(p.c, parts[1])
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format := parts[0]
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log.Debug().Strs("parts", parts).Msgf("Meme:\n%+v", text)
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go func() {
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var config []memeText
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message = strings.TrimPrefix(message, "`")
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message = strings.TrimSuffix(message, "`")
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err := json.Unmarshal([]byte(message), &config)
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if err == nil {
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message = ""
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for _, c := range config {
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message += c.Text + "\n"
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}
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} else {
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if strings.Contains(message, "||") {
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parts = strings.Split(message, "||")
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} else {
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parts = strings.Split(message, "\n")
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}
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allConfigs := p.c.GetMap("meme.memeconfigs", map[string]string{})
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configtxt, ok := allConfigs[format]
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if !ok {
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config = defaultFormatConfig()
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log.Debug().Msgf("Did not find %s in %+v", format, allConfigs)
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} else {
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err = json.Unmarshal([]byte(configtxt), &config)
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if err != nil {
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log.Error().Err(err).Msgf("Could not parse config for %s:\n%s", format, configtxt)
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config = defaultFormatConfig()
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}
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}
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j := 0
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for i := range config {
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if len(parts) > i {
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if parts[j] != "_" {
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config[i].Text = parts[j]
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}
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j++
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}
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}
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}
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bullyImg, format := p.bully(c, format, from.ID)
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id, w, h, err := p.genMeme(format, bullyImg, config)
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if err != nil {
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msg := fmt.Sprintf("Hey %v, I couldn't download that image you asked for.", from.Name)
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p.bot.Send(c, bot.Ephemeral, channel, from.ID, msg)
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return
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}
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baseURL := p.c.Get("BaseURL", ``)
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u, _ := url.Parse(baseURL)
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u.Path = path.Join(u.Path, "meme", "img", id)
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log.Debug().Msgf("image is at %s", u.String())
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_, err = p.bot.Send(c, bot.Message, channel, "", bot.ImageAttachment{
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URL: u.String(),
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AltTxt: fmt.Sprintf("%s: %s", from.Name, message),
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Width: w,
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Height: h,
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})
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if err == nil && msgID != "" {
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p.bot.Send(c, bot.Delete, channel, msgID)
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}
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m := msg.Message{
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User: &user.User{
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ID: from.ID,
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Name: from.Name,
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Admin: false,
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},
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Channel: channel,
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ChannelName: channelName,
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Body: message,
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Command: isCmd,
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Time: time.Now(),
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}
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p.bot.Receive(c, bot.Message, m)
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}()
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}
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func (p *MemePlugin) slashMeme(c bot.Connector) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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r.ParseForm()
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log.Debug().Msgf("Meme:\n%+v", r.PostForm.Get("text"))
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channel := r.PostForm.Get("channel_id")
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channelName := r.PostForm.Get("channel_name")
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userID := r.PostForm.Get("user_id")
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from := r.PostForm.Get("user_name")
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text := r.PostForm.Get("text")
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log.Debug().Msgf("channel: %s", channel)
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user := &user.User{
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ID: userID, // HACK but should work fine
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Name: from,
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}
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p.sendMeme(c, channel, channelName, "", user, text)
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w.WriteHeader(200)
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w.Write(nil)
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}
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}
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func randEntry(m map[string]string) string {
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for _, e := range m {
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return e
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}
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return ""
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}
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func DownloadTemplate(u *url.URL) (image.Image, error) {
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res, err := http.Get(u.String())
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if err != nil {
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log.Error().Msgf("template from %s failed because of %v", u.String(), err)
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return nil, err
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}
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defer res.Body.Close()
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image, _, err := image.Decode(res.Body)
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if err != nil {
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log.Error().Msgf("Could not decode %v because of %v", u, err)
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return nil, err
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}
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return image, nil
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}
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var defaultFormats = map[string]string{
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"fry": "Futurama-Fry.jpg",
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"aliens": "Ancient-Aliens.jpg",
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"doge": "Doge.jpg",
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"simply": "One-Does-Not-Simply.jpg",
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"wonka": "Creepy-Condescending-Wonka.jpg",
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"grumpy": "Grumpy-Cat.jpg",
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"raptor": "Philosoraptor.jpg",
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}
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func (p *MemePlugin) findFontSize(config []memeText, w, h int, sizes []float64) float64 {
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fontSize := 12.0
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m := gg.NewContext(w, h)
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fontLocation := p.c.Get("meme.font", "impact.ttf")
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longestStr, longestW := "", 0.0
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for _, s := range config {
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err := m.LoadFontFace(fontLocation, 12) // problem
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if err != nil {
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log.Error().Err(err).Msg("could not load font")
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return fontSize
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}
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w, _ := m.MeasureString(s.Text)
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if w > longestW {
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longestStr = s.Text
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longestW = w
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}
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}
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for _, sz := range sizes {
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err := m.LoadFontFace(fontLocation, sz) // problem
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if err != nil {
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log.Error().Err(err).Msg("could not load font")
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return fontSize
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}
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topW, _ := m.MeasureString(longestStr)
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if topW < float64(w) {
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fontSize = sz
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break
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}
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}
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return fontSize
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}
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func defaultFormatConfig() []memeText {
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return []memeText{
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{XPerc: 0.5, YPerc: 0.05, Caps: true},
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{XPerc: 0.5, YPerc: 0.95, Caps: true},
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}
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}
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func defaultFormatConfigJSON() string {
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c, _ := json.Marshal(defaultFormatConfig())
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return string(c)
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}
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func (p *MemePlugin) genMeme(meme string, bully image.Image, config []memeText) (string, int, int, error) {
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fontSizes := []float64{48, 36, 24, 16, 12}
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formats := p.c.GetMap("meme.memes", defaultFormats)
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path := uuid.New().String()
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imgName, ok := formats[meme]
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if !ok {
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imgName = meme
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}
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u, err := url.Parse(imgName)
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if err != nil || u.Scheme == "" {
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log.Debug().Err(err).Str("imgName", imgName).Msgf("url not detected")
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if u, err = url.Parse("https://imgflip.com/s/meme/" + imgName); err != nil {
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return "", 0, 0, err
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}
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}
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log.Debug().Msgf("Attempting to download url: %s", u.String())
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img, err := DownloadTemplate(u)
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if err != nil {
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log.Debug().Msgf("failed to download image: %s", err)
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return "", 0, 0, err
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}
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r := img.Bounds()
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w := r.Dx()
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h := r.Dy()
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// /meme2 5guys [{"x": 0.1, "y": 0.1, "t": "test"}]
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maxSz := p.c.GetFloat64("maxImgSz", 750.0)
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if w > h {
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scale := maxSz / float64(w)
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w = int(float64(w) * scale)
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h = int(float64(h) * scale)
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} else {
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scale := maxSz / float64(h)
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w = int(float64(w) * scale)
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h = int(float64(h) * scale)
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}
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log.Debug().Msgf("trynig to resize to %v, %v", w, h)
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img = resize.Resize(uint(w), uint(h), img, resize.Lanczos3)
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r = img.Bounds()
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w = r.Dx()
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h = r.Dy()
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log.Debug().Msgf("resized to %v, %v", w, h)
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if bully != nil {
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img = p.applyBully(img, bully)
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}
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m := gg.NewContext(w, h)
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m.DrawImage(img, 0, 0)
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fontLocation := p.c.Get("meme.font", "impact.ttf")
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m.LoadFontFace(fontLocation, p.findFontSize(config, w, h, fontSizes))
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for i, c := range config {
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if c.Caps {
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config[i].Text = strings.ToUpper(c.Text)
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}
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}
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// Apply black stroke
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m.SetHexColor("#000")
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strokeSize := 6
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for dy := -strokeSize; dy <= strokeSize; dy++ {
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for dx := -strokeSize; dx <= strokeSize; dx++ {
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// give it rounded corners
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if dx*dx+dy*dy >= strokeSize*strokeSize {
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continue
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}
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for _, c := range config {
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x := float64(w)*c.XPerc + float64(dx)
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y := float64(h)*c.YPerc + float64(dy)
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m.DrawStringAnchored(c.Text, x, y, 0.5, 0.5)
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}
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}
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}
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// Apply white fill
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m.SetHexColor("#FFF")
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for _, c := range config {
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x := float64(w) * c.XPerc
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y := float64(h) * c.YPerc
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m.DrawStringAnchored(c.Text, x, y, 0.5, 0.5)
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}
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i := bytes.Buffer{}
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png.Encode(&i, m.Image())
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p.images[path] = &cachedImage{time.Now(), i.Bytes()}
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log.Debug().Msgf("Saved to %s\n", path)
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return path, w, h, nil
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}
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func (p *MemePlugin) applyBully(img, bullyImg image.Image) image.Image {
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dst := image.NewRGBA(img.Bounds())
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scaleFactor := p.c.GetFloat64("meme.bullyScale", 0.1)
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position := p.c.GetString("meme.bullyPosition", "botright")
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scaleFactor = float64(img.Bounds().Max.X) * scaleFactor / float64(bullyImg.Bounds().Max.X)
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newSzX := uint(float64(bullyImg.Bounds().Max.X) * scaleFactor)
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newSzY := uint(float64(bullyImg.Bounds().Max.Y) * scaleFactor)
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bullyImg = resize.Resize(newSzX, newSzY, bullyImg, resize.Lanczos3)
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draw.Draw(dst, img.Bounds(), img, image.Point{}, draw.Src)
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srcSz := img.Bounds().Size()
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w, h := bullyImg.Bounds().Max.X, bullyImg.Bounds().Max.Y
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pt := image.Point{srcSz.X - w, srcSz.Y - h}
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switch position {
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case "botleft":
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pt = image.Point{0, srcSz.Y - h}
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case "topright":
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pt = image.Point{srcSz.X - w, 0}
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case "topleft":
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pt = image.Point{0, 0}
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}
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rect := image.Rect(pt.X, pt.Y, srcSz.X, srcSz.Y)
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draw.DrawMask(dst, rect, bullyImg, image.Point{}, &circle{image.Point{w / 2, h / 2}, w / 2}, image.Point{}, draw.Over)
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return dst
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}
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// the following is ripped off of https://blog.golang.org/image-draw
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type circle struct {
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p image.Point
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r int
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}
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func (c *circle) ColorModel() color.Model {
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return color.AlphaModel
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}
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func (c *circle) Bounds() image.Rectangle {
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return image.Rect(c.p.X-c.r, c.p.Y-c.r, c.p.X+c.r, c.p.Y+c.r)
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}
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func (c *circle) At(x, y int) color.Color {
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xx, yy, rr := float64(x-c.p.X)+0.5, float64(y-c.p.Y)+0.5, float64(c.r)
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if xx*xx+yy*yy < rr*rr {
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return color.Alpha{255}
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}
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return color.Alpha{0}
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}
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