Port over saveable command from Python

commands/img/img.go

@@ -0,0 +1,110 @@
+package img
+
+import (
+	"errors"
+	"net/http"
+	"time"
+
+	"github.com/Fluffy-Bean/lynxie/app"
+	"github.com/Fluffy-Bean/lynxie/utils"
+	"github.com/bwmarrin/discordgo"
+)
+
+const maxFileSize = 1024 * 1024 * 10 // 10MB
+
+var client = http.Client{
+	Timeout: 10 * time.Second,
+}
+
+func RegisterImgCommands(a *app.App) {
+	a.RegisterCommand("saveable", registerSaveable(a))
+
+	a.RegisterCommandAlias("gif", "saveable")
+}
+
+func registerSaveable(a *app.App) app.Callback {
+	return func(h *app.Handler, args []string) app.Error {
+		fileEndpoint, err := getClosestImage(h)
+		if err != nil {
+			return app.Error{
+				Msg: "Could not get image",
+				Err: err,
+			}
+		}
+
+		req, err := http.NewRequest(http.MethodGet, fileEndpoint, nil)
+		if err != nil {
+			return app.Error{
+				Msg: "",
+				Err: err,
+			}
+		}
+
+		if req.ContentLength > maxFileSize {
+			return app.Error{
+				Msg: "Could not get image",
+				Err: errors.New("requested file is too big"),
+			}
+		}
+
+		res, err := client.Do(req)
+		if err != nil {
+			return app.Error{
+				Msg: "",
+				Err: err,
+			}
+		}
+		defer res.Body.Close()
+
+		h.Session.ChannelMessageSendComplex(h.Message.ChannelID, &discordgo.MessageSend{
+			Embed: &discordgo.MessageEmbed{
+				Title:       "Saveable",
+				Description: "Image converted to GIF :3",
+				Image: &discordgo.MessageEmbedImage{
+					URL: "attachment://image.gif",
+				},
+				Color: utils.ColorFromRGB(255, 255, 255),
+			},
+			Files: []*discordgo.File{
+				{
+					Name:        "image.gif",
+					ContentType: "image/gif",
+					Reader:      res.Body,
+				},
+			},
+			Reference: h.Reference,
+		})
+
+		return app.Error{}
+	}
+}
+
+func getClosestImage(h *app.Handler) (string, error) {
+	// Get message attachments
+	if len(h.Message.Attachments) >= 1 {
+		if h.Message.Attachments[0].Size > maxFileSize {
+			return "", errors.New("file size is too big")
+		}
+
+		return h.Message.Attachments[0].ProxyURL, nil
+	}
+
+	// If no attachments exist... see if the message is replying to someone
+	if h.Message.ReferencedMessage != nil {
+		if len(h.Message.ReferencedMessage.Attachments) >= 1 {
+			if h.Message.ReferencedMessage.Attachments[0].Size > maxFileSize {
+				return "", errors.New("file size is too big")
+			}
+
+			return h.Message.ReferencedMessage.Attachments[0].ProxyURL, nil
+		}
+
+		// Maybe replying to an embed...?
+		if len(h.Message.ReferencedMessage.Embeds) >= 1 {
+			//... no file size is provided
+			return h.Message.ReferencedMessage.Embeds[0].Image.ProxyURL, nil
+		}
+	}
+
+	return "", errors.New("no files exists")
+}

main.go

@@ -5,6 +5,7 @@ import (
 
 	"github.com/Fluffy-Bean/lynxie/app"
 	"github.com/Fluffy-Bean/lynxie/commands/debug"
+	"github.com/Fluffy-Bean/lynxie/commands/img"
 	"github.com/Fluffy-Bean/lynxie/commands/porb"
 	"github.com/Fluffy-Bean/lynxie/commands/tinyfox"
 	"github.com/bwmarrin/discordgo"
@@ -18,6 +19,7 @@ func main() {
 	})
 
 	debug.RegisterDebugCommands(a)
+	img.RegisterImgCommands(a)
 	tinyfox.RegisterTinyfoxCommands(a)
 	porb.RegisterPorbCommands(a)