feat: add reaction to react with an emoji

reaction/discordReaction.go

@@ -0,0 +1,112 @@
+package reaction
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+	"time"
+)
+
+type DiscordMessageResponse struct {
+	ID        string `json:"id"`
+	ChannelID string `json:"channel_id"`
+	Reactions []struct {
+		Emoji struct {
+			Name string `json:"name"`
+		} `json:"emoji"`
+		Me    bool `json:"me"`
+		Count int  `json:"count"`
+	} `json:"reactions"`
+}
+
+func ReactWithDiscordReaction(conf map[string]any) error {
+	botToken := os.Getenv("DISCORD_BOT_TOKEN")
+	if botToken == "" {
+		return fmt.Errorf("DISCORD_BOT_TOKEN environment variable is not set")
+	}
+
+	channelID := "1442506377674096690"
+
+	emoji := "🦐"
+
+	latestMessageID, err := getLatestMessage(botToken, channelID)
+	if err != nil {
+		return fmt.Errorf("error getting latest message: %w", err)
+	}
+
+	if latestMessageID == "" {
+		return nil
+	}
+
+	err = addReaction(botToken, channelID, latestMessageID, emoji)
+	if err != nil {
+		return fmt.Errorf("error adding reaction: %w", err)
+	}
+
+	return nil
+}
+
+func getLatestMessage(botToken, channelID string) (string, error) {
+	url := fmt.Sprintf("https://discord.com/api/v10/channels/%s/messages?limit=1", channelID)
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return "", err
+	}
+
+	req.Header.Set("Authorization", fmt.Sprintf("Bot %s", botToken))
+	req.Header.Set("Content-Type", "application/json")
+
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(resp.Body)
+		return "", fmt.Errorf("Discord API error (status %d): %s", resp.StatusCode, string(body))
+	}
+
+	var messages []DiscordMessageResponse
+	if err := json.NewDecoder(resp.Body).Decode(&messages); err != nil {
+		return "", err
+	}
+
+	if len(messages) == 0 {
+		return "", nil
+	}
+
+	return messages[0].ID, nil
+}
+
+func addReaction(botToken, channelID, messageID, emoji string) error {
+	encodedEmoji := url.PathEscape(emoji)
+	apiURL := fmt.Sprintf("https://discord.com/api/v10/channels/%s/messages/%s/reactions/%s/@me",
+		channelID, messageID, encodedEmoji)
+
+	req, err := http.NewRequest("PUT", apiURL, nil)
+	if err != nil {
+		return err
+	}
+
+	req.Header.Set("Authorization", fmt.Sprintf("Bot %s", botToken))
+	req.Header.Set("Content-Type", "application/json")
+
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusNoContent {
+		body, _ := io.ReadAll(resp.Body)
+		return fmt.Errorf("Discord API error (status %d): %s", resp.StatusCode, string(body))
+	}
+
+	return nil
+}

templates/config.go

@@ -174,6 +174,26 @@ var Services = map[string]*Service{
 				},
 				Handler: reaction.ReactWithDiscordMsg,
 			},
+			"discord_add_emoji": {
+				Name:        "discord_add_emoji",
+				Description: "Add emoji to last msg",
+				Service:     "Discord",
+				Config: []ReactionField{
+					{
+						Name:     "channel_id",
+						Type:     "text",
+						Label:    "Channel ID",
+						Required: true,
+					},
+					{
+						Name:     "content",
+						Type:     "text",
+						Label:    "Message Content",
+						Required: true,
+					},
+				},
+				Handler: reaction.ReactWithDiscordReaction,
+			},
 		},
 	},